WO2020048529A1

WO2020048529A1 - Handheld power tool, and control method and operation method therefor

Info

Publication number: WO2020048529A1
Application number: PCT/CN2019/104744
Authority: WO
Inventors: 钟红风; 郑悦; 张士松; 孙益民
Original assignee: 苏州宝时得电动工具有限公司
Priority date: 2018-09-06
Filing date: 2019-09-06
Publication date: 2020-03-12
Also published as: CN110877324A; CN210998541U

Abstract

A handheld power tool, and a control method and operation method therefor. The handheld power tool comprises: a machine casing; a motor (12a); a chuck mechanism, comprising a body (151a), a plurality of clamping jaws (152a), and an adjusting member; a transmission mechanism; a mode selection mechanism, comprising a mode selection member (301a), wherein when the mode selection member (301a) is in a first position, the handheld power tool is in a drilling mode, and when the mode selection member (301a) is in a second position, the handheld power tool is in a chuck adjustment mode; a control module (66) used for responding to the movement of the mode selection member (301a) when the handheld power tool is in the chuck adjustment mode, and controlling the motor (12a) to rotate in a predetermined direction so as to implement the opening or closing of the clamping jaws (152a). When an operator is working, the clamping jaws (152a) may be directly closed or opened by means of corresponding components of the mode switching function, which thus facilitates the release and locking of a tool head, and has high flexibility.

Description

Hand-held power tool, control method and operation method thereof

This application claims the priority of a Chinese patent application with a filing date of September 6, 2018, application number 2018110377676, and an invention name of "Handheld Power Tool and Control Method and Operation Method", the entire contents of which are incorporated herein by reference. In this application.

Technical field

The invention relates to the technical field of power tools, in particular to a handheld power tool and a control method and an operation method thereof.

Background technique

A hand-held power tool, such as an electric drill, is used to drill a workpiece (such as a wooden board or a cement board) or a screwdriver is used to loosen or tighten the screw. The drive shaft is provided with a chuck for holding a tool head. Depending on the function of the hand-held power tool, different specifications and types of tool heads can be selected (such as screwdriver bits, flat drills for drilling on wooden boards, impact drills for drilling on cement boards, and Twist drills drilled on steel plates, etc.), when changing the tool head, you first need to open the chuck to release the tool head originally clamped to the chuck, then insert the new tool head and then lock it in the chuck. The chuck usually includes a chuck core body connected to the main shaft of the power tool. A plurality of chucks movably disposed on the chuck core body and movable along the chuck core shaft are sleeved on the outside of the chuck core body and are connected with the chuck. Claw-threaded adjustments (such as nut sleeves). A mode adjustment operation member is connected to the adjustment member. Under normal circumstances, the user can manually rotate the mode adjustment operation member to cause the adjustment member to rotate relative to the stationary output shaft and the collet core body. The rotation of the adjustment member promotes the clamp that is matched with its thread. The jaw is reciprocally moved at an angle with respect to the collet core body at an angle along the axis of the collet core body, thereby achieving clamping or relaxation of the working part. To meet the work requirements, the clamping force of the chuck to the tool head is often high, manual operation is not tight, it is laborious, and it is difficult to meet the requirements of the clamping force.

During use, especially during mode switching, the operator needs to hold the handle part with one hand and perform the start-up control with the gripped hand. When the mode is switched, the other hand is also required to rotate the adjustment part, especially When the workpiece needs to be moved, the operator will constantly switch between various actions, which is very inconvenient to operate.

Summary of the Invention

Based on this, it is necessary to provide a hand-held power tool that is easy to operate.

The above objective is achieved through the following technical solutions:

A hand-held power tool includes:

A case with a handle portion;

A motor provided in the casing;

A chuck mechanism includes a main body, a plurality of clamping jaws movably disposed relative to the main body, and an adjusting member that is threadedly connected to the plurality of clamping jaws. The relative movement of the adjusting member and the main body can drive the plurality of clamping jaws to close together. Or open to lock or release the tool head;

A transmission mechanism capable of outputting the power of the motor to the chuck mechanism;

A mode selection mechanism for operatively switching the handheld power tool between at least a drilling mode and a chuck adjustment mode; when the handheld power tool is in a drilling mode, the motor can drive the The main body, the clamping jaw, and the adjustment member rotate together; when the hand-held power tool is in a chuck adjustment mode, one of the adjustment member and the body can rotate relative to the other of the two to enable A plurality of the clamping jaws are closed or opened relative to the body; the mode selection mechanism includes a mode selection member capable of moving between a first position and a second position with respect to the casing. When the mode selector is in the first position, the handheld power tool is in a drilling mode; when the mode selector is in the second position, the handheld power tool is in a chuck adjustment mode; the handheld The power tool further includes a control module for responding to the movement of the mode selector when the hand-held power tool is in a chuck adjustment mode, and controlling the motor to rotate in a predetermined direction. To effect opening of the jaws or closed.

In one embodiment, when the hand-held power tool is switched to the chuck adjustment mode, the control module is capable of responding to the movement of the mode selector and controlling the motor to rotate in a first rotation direction, and when the The hand-held power tool is switched to the chuck adjustment mode again, and the control module can respond to the movement of the mode selector and control the motor to rotate in a second rotation direction opposite to the first rotation direction, so that the mode selection The alternating operation of the pieces can realize the alternate opening and closing of the jaws.

In one embodiment, the mode selection member is disposed adjacent to the handle portion, and when an operator holds the handle portion, the operator can simultaneously operate the mode selection with a hand holding the handle portion Pieces.

In one of the embodiments, the motion of the mode selector between the first position and the second position is a linear motion.

In one embodiment, an end of the chuck mechanism remote from the motor is a first end of the chuck mechanism, and when the mode selector moves from the first position to the second position, The mode selector moves in a direction away from the first end and closer to the motor.

In one embodiment, the hand-held power tool includes a trigger mechanism, and when the mode selection member is operated and the hand-held power tool is placed in a chuck adjustment mode, the trigger mechanism can respond to the operation of the mode selection member and cause the The control module controls the motor to rotate in a predetermined rotation direction.

In one embodiment, the trigger mechanism includes a switch trigger and a bypass switch capable of moving under the action of a mode selector, and when the mode selector moves and places the hand-held power tool in a chuck adjustment mode The mode selector can trigger the bypass switch to be closed by the switch trigger, so that the bypass switch is connected to the control module, and the control module controls the motor to rotate in a predetermined direction. Turn.

In one embodiment, the trigger mechanism includes a signal detection module, and the signal detection module is electrically connected to the control module. When the mode selector moves and the handheld power tool is in the chuck adjustment mode, all The signal detection module is capable of generating a trigger signal and transmitting the trigger signal to the control module, and the control module controls the motor to rotate in a predetermined rotation direction.

In one embodiment, the handheld power tool further includes a power supply, and the signal detection module includes a first trigger electrically connected to the power supply and a second trigger electrically connected to the control module. A component, when the mode selection member moves along the first position to the second position, the first trigger or the second trigger moves under the action of the mode selection member and causes the The first trigger is electrically connected to the second trigger, and the signal detection module generates a high-level signal and transmits it to the control module so that the control module controls the motor to rotate in a predetermined rotation direction.

In one embodiment, the control module includes a signal processing unit and a controller for controlling the rotation of the motor. The signal processing unit is configured to receive a trigger signal from the signal detection module and adjust the motor according to the previous chuck. The rotation direction in the mode processes a signal and outputs it to the controller, which controls the motor to rotate in a direction opposite to that in the previous chuck adjustment mode.

In one embodiment, the housing further includes a main body portion that houses the motor and extends along the axial direction of the motor, the handle portion is disposed at an angle to the main body portion, and the power tool further includes The switch trigger of the handle part, when the hand-held power tool is in the drilling mode, the operator can press the switch trigger in the bending direction of the grip finger while holding the handle part, so that the switch trigger is moved closer to the palm position to Start the motor.

In one of the embodiments, the control module further includes an interlock control unit, and when the motor is started under the action of one of the mode selector or the switch trigger, the interlock control unit causes the The motor no longer rotates in the other operation.

In one of the embodiments, the movement of the mode selector between the first position and the second position is an axial movement of the motor.

In one of the embodiments, the mode selection mechanism further includes a mode resetting element that elastically abuts the mode selection element, and the mode selection element is operable to move from the first position against the force of the mode resetting element. To the second position, and capable of returning from the second position to the first position under the action of the elastic force of the mode resetting element.

In one embodiment, the mode selection mechanism includes a bracket slidably disposed on the casing, and the mode selection member is pivotally disposed on the bracket and can be at an initial position relative to the first bracket relative to the bracket. Rotating between a position, the initial position is closer to the body than the first position and away from the switch trigger.

In one embodiment, a rotation resetting member is further provided between the mode selecting member and the casing, and the mode selecting member is operable to move the force of the mode resetting element from the initial position to the first position, It can return to the initial position from the first position under the action of the rotation resetting member.

In one of the embodiments, the mode selection mechanism further includes a connecting member and a locking element capable of axially moving along the motor shaft under the action of the mode selection member, and the locking element is non-rotatably opposite to The casing is provided;

When the hand-held power tool is in the chuck adjustment mode, the locking element locks the body relative to the casing, the connection member connects the adjustment member and the motor shaft in a rotation direction, and the control module Controlling the motor to rotate and transmitting power to the adjusting member through the motor, so that the adjusting member can rotate relative to the body and the clamping claw;

When the hand-held power tool is in a drilling mode, the locking element is separated from the body, and the connecting member disconnects power transmission between the motor shaft and the adjusting member, and the body is in the motor After starting, it can be driven by the motor shaft to drive the clamping jaw and the adjusting member to rotate.

In one of the embodiments, when the hand-held power tool is switched between the drilling mode and the chuck adjustment mode through the mode selector, the connecting member and the locking element are synchronized by the mode selector motion.

In one embodiment, a moving direction of the connecting member and the locking element is the same as a moving direction of the mode selecting member.

A method for operating a hand-held power tool, which is applied to the hand-held power tool according to the above technical features. The method includes the following steps:

S1: Operate the mode selector with the hand holding the handle portion, and move the mode selector from the first position to the second position;

S2: Release mode selector.

In one of the embodiments, S3: once again select the hand operation mode holding part of the handle part to move it from the first position to the second position;

S4: Release mode selector.

In one embodiment, before moving the operation mode selection member from the first position to the second position, the method further includes moving the mode selection member from the initial position to the first position.

In one embodiment, the movement of the operation mode selector from the first position to the second position is a linear motion, and the movement of the operation mode selector from the initial position to the first position is a rotational motion.

In one embodiment, the direction of the linear movement of the mode selector from the first position to the second position is a first direction along the motor axis, wherein the first direction is a direction away from the chuck mechanism and close to the motor, The rotation of the operation mode selector from the initial position to the first position is a rotation of the mode selector around a pivot axis.

In one embodiment, in step S1, the motor is rotated in the first rotation direction, and in step S3, the motor is rotated in the second rotation direction opposite to the first rotation direction.

A method for operating a hand-held power tool, which is applied to the hand-held power tool according to the above technical features. The hand-held power tool includes a reversing switch for controlling the turning of the motor, and the reversing switch has a first control. The position and the second control position, wherein the control method includes the following steps:

S10: Operate the reversing switch with a hand holding the handle portion, and move the reversing switch to the first control position or the second control position;

S11: Operate the mode selector with a hand holding the handle portion, and move the mode selector from the first position to the second position;

S12: Release mode selector.

A control method of a hand-held power tool, which is applied to the hand-held power tool according to the above technical features. The hand-held tool includes a trigger switch for starting a drilling mode, and controls a motor to perform forward rotation and reverse rotation. A reversing switch, when the mode selector is in the second position, the first switch is triggered, the hand-held power tool is in a start-up chuck adjustment mode, and the control method includes:

The first switch is triggered to start the first control circuit, and the control module controls the motor to rotate forward or reverse in a preset mode regardless of the reversing switch; or

The trigger switch is triggered to start the second control circuit, and the control module controls the motor to rotate forward or reverse according to the reversing signal of the reversing switch.

In one embodiment, the control method further includes, when the mode selector is in the first position, activating a second control circuit to control the motor to rotate forward or reverse according to a commutation signal of a commutation switch.

In one embodiment, the step of starting the first control circuit, the control module controlling the motor to rotate forward or reverse according to a preset mode regardless of the commutation switch includes:

Determine whether the signal detection mode generates a trigger signal;

If yes, the control module controls the motor to rotate according to a preset first direction, where the first direction is forward rotation or reverse rotation;

The first switch is triggered again to determine whether the signal detection module detects a trigger signal;

If so, the control motor is rotated in a second direction opposite to the first direction.

In one embodiment, the first switch is triggered again, and the step of determining whether the signal detection module generates a trigger signal includes:

It is determined whether the first switch is triggered again, and the control module detects whether the time of the trigger signal meets the preset first time, and if so, controls the motor to rotate in a second direction opposite to the first direction.

In one embodiment, the control method specifically includes:

Determine whether the signal detection mode generates a trigger signal;

If yes, control the motor to rotate according to a preset direction, that is, the first direction, and modify the preset direction to a second direction opposite to the first direction, where the first direction is a forward rotation or a reverse rotation;

The first switch is triggered again to determine whether the signal detection module generates a trigger signal;

If yes, the control motor is rotated according to a preset second direction, and the preset direction is changed to the first direction.

In one embodiment, the step of triggering the trigger switch to start the second control circuit to control the motor to rotate forward or reverse in accordance with the steering signal of the reversing switch includes:

The trigger switch is triggered to start a second control circuit;

The control module obtains the current turning signal of the reversing switch;

The control module controls the motor to control the motor to rotate forward or reverse according to the current steering signal.

In one embodiment, the control method further includes:

When the first control circuit is started, the control motor rotates forward or reverse according to a preset mode regardless of the reversing switch. At this time, the control module shields the trigger signal of the trigger switch;

When the second control circuit is started, the control motor rotates forward or reverse according to the position of the reversing switch. At this time, the control module shields the trigger signal of the first switch.

A hand-held power tool includes:

A motor having a motor shaft capable of outputting rotational power;

A casing, comprising a handle portion for holding and a main body portion accommodating a motor;

The chuck assembly includes a main body, a plurality of clamping jaws movably disposed relative to the body, and an adjusting member that is threadedly connected to the plurality of clamping jaws. An end of the chuck assembly remote from the motor is the chuck assembly. First end

A transmission mechanism having a drive shaft capable of outputting the power of the motor, and

A mode selection mechanism for operatively switching the handheld power tool between at least a drilling mode and a chuck adjustment mode; when the handheld power tool is in a drilling mode, the drive shaft drives the The body, the clamping jaw, and the adjustment member rotate together; when the hand-held power tool is in a chuck adjustment mode, one of the adjustment member and the body can be driven by the motor relative to the two Another rotation to move the plurality of clamping jaws relative to the body to close or open;

The mode selection mechanism includes a mode selection member capable of moving between a first position and a second position relative to the casing, and when the mode selection member is in the first position, the hand-held power tool is in a drilling mode ;

When the mode selector is in the second position, the hand-held power tool is in the chuck adjustment mode; when the mode selector is moved from the first position to the second position, the mode selector is moved away from the first position. The direction of one end moves; when the operator holds the handle portion, the operator can simultaneously operate the mode selector with a hand holding the handle portion.

In one embodiment, the movement of the mode selector between the first position and the second position is an axial movement along the motor shaft.

In one of the embodiments, the mode selection mechanism further includes a mode resetting element elastically abutting the mode selection element, and the mode selection element is operable to overcome the force of the mode resetting element from the first The position is moved to the second position, and can be restored from the second position to the first position by the elastic force of the mode reset element.

In one embodiment, the handle portion is disposed at an angle to the main body portion, the power tool further includes a switch trigger provided on the handle portion, and the mode selection member is disposed adjacent to the switch trigger.

In one of the embodiments, the mode selection member at least partially overlaps the jaw.

When the mode selecting member is in the second position, the locking element locks the body relative to the casing, and the connecting member can transmit the rotational power of the motor shaft to the adjusting member so that all the The adjusting member can be rotated relative to the body;

When the mode selection member is in the first position, the locking element is separated from the body, the connection member disconnects power transmission between the motor shaft and the adjustment member, and the body is driven by the motor shaft Driving thereby drives the adjustment member to rotate.

In one embodiment, when the mode selection member moves between the first position and the second position, the connecting member and the locking element move synchronously under the action of the mode selection member.

In one embodiment, the transmission mechanism includes an output planetary gear train including an output sun gear, an output planet gear meshed with the output sun gear and rotatably disposed on the body, and An output ring gear coupled to the output planetary gear;

When the mode selector is in the first position, the locking element is connected to the output ring gear without relative rotation, and the drive shaft drives the body to rotate through the output planetary gear.

In one embodiment, when the mode selector is in the second position, the locking element is disconnected from the output ring gear, and the output ring gear rotates under the driving of the planetary gear, so The connecting member is drivingly connected between the output ring gear and the adjusting member in a rotation direction to transmit the rotating power of the motor to the adjusting member.

In one embodiment, when the mode selecting member is located at the first position, the connecting member is located on a side of the output ring gear away from the motor and is connected to the adjusting member without relative rotation;

When the hand-held power tool is switched from the drilling mode to the chuck adjustment mode, the connecting member and the locking element move along the axis of the motor shaft toward the motor, so that the connection The member meshes with the output ring gear in the rotation direction, and at the same time, the locking element is disengaged from the output ring gear and fixes the body relative to the casing.

After adopting the above technical solution, the present invention has at least the following technical effects:

The hand-held power tool of the present invention and its control method and operation method. After the operation mode selection member, the hand-held power tool is in the chuck adjustment mode, and the control module will correspondingly move the operation member to control the motor to rotate in a predetermined direction to achieve the clamping The jaws open or close to release and lock the tool head. In this way, when the operator is working, the clamping jaw can be directly closed or opened by the corresponding mode switching function component, which facilitates the release and locking of the tool head and has high flexibility.

BRIEF DESCRIPTION OF THE DRAWINGS

1 is a partially exploded perspective view of a transmission mechanism and a chuck assembly in a first embodiment of the present invention;

2 is a perspective view of a screwdriver according to a first embodiment of the present invention;

3 is a cross-sectional view of a screwdriver in a chuck adjustment mode with a clamping jaw in a first embodiment of the present invention;

4 is a cross-sectional view of a screwdriver in a chuck adjustment mode in a first embodiment of the present invention, and a clamping jaw is in a released state;

5 is a cross-sectional view of a screwdriver in a drilling mode according to a first embodiment of the present invention, and the screwdriver is in a low-speed state;

6 is a cross-sectional view of a screwdriver in a drilling mode according to a first embodiment of the present invention, and the screwdriver is in a high-speed state;

7 is an enlarged view of a portion A in FIG. 3;

FIG. 8 is a schematic diagram of a positional relationship between a mode selector and a chute when a clamping jaw is in an open state in a chuck adjustment mode in the first embodiment of the present invention; FIG.

FIG. 9 is a schematic diagram of a motor reversing switch triggered by an opening trigger of a switching ring in a state corresponding to FIG. 8; FIG.

10 is a schematic diagram showing a positional relationship between a mode selector and a chute when a screwdriver is in a low-speed state in a drilling mode according to the first embodiment of the present invention;

11 is a schematic diagram showing a relationship between a position of a switching ring and a position of a motor reversing switch in a state corresponding to FIG. 10;

FIG. 12 is a schematic diagram showing a positional relationship between a mode selector and a chute when a clamping jaw of a chuck adjustment mode is in a locked state in the first embodiment of the present invention; FIG.

FIG. 13 is a schematic diagram of a motor trigger switch being triggered by a lock trigger of a switching ring in a state corresponding to FIG. 12; FIG.

14 is a schematic perspective view of a second ring gear with a shift wire in the first embodiment of the present invention;

15 is a schematic diagram of a positional relationship among a gear box housing, a shift wire, a mode selection member, and a switching ring in the first embodiment of the present invention;

16 is a schematic perspective view of a mode selector and a slider connected to the mode selector in the first embodiment of the present invention;

17 is a schematic perspective view of a switching ring in the first embodiment of the present invention;

18 is a schematic perspective view of a screwdriver in a low-speed state in a drilling mode according to the first embodiment of the present invention;

19 is a schematic perspective view of a screwdriver in a high-speed state in a drilling mode according to the first embodiment of the present invention;

20 is a schematic perspective view in a state corresponding to FIG. 8;

21 is a schematic perspective view of a state corresponding to FIG. 12;

22 is a schematic perspective view of an output ring gear and a second push rod assembly connected thereto in the first embodiment of the present invention;

23 is a schematic perspective view of a body lock and a first push rod assembly connected thereto in the first embodiment of the present invention;

24 is a partially exploded perspective view of a transmission mechanism and a chuck assembly in a second embodiment of the present invention;

25 is a cross-sectional view of a screwdriver in a drilling mode according to a second embodiment of the present invention;

26 is a cross-sectional view of a screwdriver in a chuck adjustment mode according to a second embodiment of the present invention;

27 is a partial cross-sectional view of a screwdriver in a drilling mode according to a third embodiment of the present invention;

FIG. 28 is a partial sectional view of an intermediate state where the screwdriver is switched from the drilling mode to the chuck adjustment mode in the third embodiment of the present invention; FIG.

29 is a partial cross-sectional view of an intermediate state where the screwdriver is switched from a drilling mode to a chuck adjustment mode in a third embodiment of the present invention;

30 is a partial cross-sectional view of a screwdriver in a chuck adjustment mode according to a third embodiment of the present invention;

31 is an exploded perspective view of a partial structure of a screwdriver in a fourth embodiment of the present invention;

32 is a schematic cross-sectional view of a screwdriver in a drilling mode according to a fourth embodiment of the present invention;

33 is a schematic partial structural diagram of a screwdriver in a drilling mode according to a fourth embodiment of the present invention;

34 is a schematic cross-sectional view of a screwdriver in a chuck adjustment mode in a fourth embodiment of the present invention;

35 is a partial structural diagram of a screwdriver in a chuck adjustment mode in a fourth embodiment of the present invention;

35a is a schematic partial structural diagram of a screwdriver in a drilling mode and a trigger switch at an end position in a fourth embodiment of the present invention;

36 is a schematic structural diagram of a screwdriver in a fourth embodiment of the present invention, in which an operator holds a handle portion with one hand and operates a mode selection member;

37 is a schematic cross-sectional view of a partial structure of a screwdriver in a chuck adjustment mode in a fourth embodiment of the present invention;

38 is a schematic cross-sectional view of a partial structure of a screwdriver in a chuck adjustment mode in a fourth embodiment of the present invention;

39 is a schematic cross-sectional view of a partial structure of a screwdriver in a drilling mode according to a fourth embodiment of the present invention;

FIG. 40 is a schematic partial structural diagram of a screwdriver according to an embodiment of the present invention, in which the mode selection member is located at the second position, the first abutment portion abuts the first limit arm, and the first limit arm is adapted to drive the limit mechanism to press. Pivot in a preset direction;

FIG. 41 is a partial structural schematic diagram of a screwdriver according to an embodiment of the present invention. When the mode selection member continues to move in the first direction, the mode selection member continues to push the interlock unit to rotate, and the second limit arm will abut against the switch trigger ;

42 is a schematic diagram of a partial structure of a screwdriver according to an embodiment of the present invention, in which a switch trigger moves in a first direction to an end position, and a first limit arm abuts on a mode selection member;

43 is an axial cross-sectional view of a screwdriver in a low-speed position in a drilling mode according to a fifth embodiment of the present invention;

44 is a top cross-sectional view of a screwdriver in a low-speed position in a drilling mode according to a fifth embodiment of the present invention;

45 is an axial sectional view of a screwdriver in a high-speed position in a drilling mode according to a fifth embodiment of the present invention;

46 is a top cross-sectional view of a screwdriver in a high-speed position in a drilling mode according to a fifth embodiment of the present invention;

47 is an axial sectional view of an intermediate state when the screwdriver is switched from the drilling mode high speed position to the chuck adjustment mode in the fifth embodiment of the present invention;

FIG. 48 is a top sectional view of an intermediate state when the screwdriver is switched from the drilling mode high speed position to the chuck adjustment mode in the fifth embodiment of the present invention; FIG.

FIG. 49 is an axial sectional view of a screwdriver in a chuck adjustment mode in a fifth embodiment of the present invention; FIG.

50 is a top cross-sectional view of a screwdriver in a chuck adjustment mode in a fifth embodiment of the present invention;

FIG. 51 is a schematic diagram illustrating a cooperation between a speed selector and a mode selector of a screwdriver in a fifth embodiment of the present invention; FIG.

52 is a schematic structural diagram of a speed selection member of a screwdriver in a fifth embodiment of the present invention;

53 is a schematic structural diagram of a dial of a screwdriver in a fifth embodiment of the present invention;

FIG. 54 is a schematic structural diagram of the screwdriver shown in FIG. 36, in which an operator holds a handle portion with one hand and operates a switchboard machine;

55 is a schematic diagram of a modification of a mode selector in a fifth embodiment of the present invention;

56 is a schematic circuit connection diagram of the screwdriver shown in FIG. 36;

FIG. 57 is a schematic structural diagram of an electrical component connection in the screwdriver shown in FIG. 36; FIG.

58 is a flowchart of a control method of a handheld power tool;

FIG. 59 is a flowchart of a control method of a handheld power tool.

detailed description

In order to make the objectives, technical solutions, and advantages of the present invention clearer, the hand-held power tool, the control method, and the operation method of the present invention will be further described in detail below through embodiments and the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

The serial numbers of components in this article, such as "first", "second", etc., are only used to distinguish the described objects and do not have any order or technical meaning. The terms “connection” and “connection” in this application include direct and indirect connections (connections) unless otherwise specified. In the description of the present invention, it should be understood that the terms "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", The orientations or positional relationships indicated by "bottom", "inner", "outer", "clockwise", "counterclockwise" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description. , Rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention.

In the present invention, unless explicitly stated and defined otherwise, the first feature "on" or "down" of the second feature may be the first and second features in direct contact, or the first and second features indirectly through an intermediate medium. contact. Moreover, the first feature is "above", "above", and "above" the second feature. The first feature is directly above or obliquely above the second feature, or only indicates that the first feature is higher in level than the second feature. The first feature is “below”, “below”, and “below” of the second feature. The first feature may be directly below or obliquely below the second feature, or it may simply indicate that the first feature is less horizontal than the second feature.

First embodiment

In a preferred embodiment of the hand-held power tool of the present invention, the hand-held power tool is a screwdriver. According to different power sources, it can be divided into a pneumatic screwdriver, a hydraulic screwdriver and an electric screwdriver. For AC points, the present invention preferably uses a DC electric screwdriver as an example for specific description.

Referring to FIG. 1 to FIG. 6, the DC electric screwdriver 10 includes a casing, a motor 12 that provides rotational power, a battery 18 for power supply, a transmission mechanism, and a chuck assembly. Output device 15 in the chuck housing 1104.

The cabinet includes a handle portion for holding and a main body portion for accommodating a motor. The handle portion is disposed at an angle to the main body portion, and the handle portion includes a handle housing 1102 for forming a grip handle. The main body portion includes a main housing 1101 that is fixedly connected to the handle housing 1102 and can be used to support and cover the motor 12. . Specifically, the main casing 1101 is a cylindrical structure extending in a horizontal direction formed by the chuck casing 1104 (front casing) and the rear casing 1103 being abutted. In this embodiment, the main housing 1101 and the handle housing 1102 are arranged at an obtuse angle K. Preferably, the angle K is between 100 degrees and 130 degrees, so that the handle is more comfortable to operate. The main housing 1101 has a rear position (the forward and rear directions mentioned in the present invention refer to the forward and rear directions of the hand-held power tool shown in FIG. 4 as a reference standard, that is, from the rear to the forward direction by the motor to The direction of the output device 15) is the rear end surface and the front end surface. The main housing 1101 houses the motor 12, the transmission mechanism, and at least part of the output device 15 in this order from the rear end surface to the front end surface. In this embodiment, what needs to be explained is In this embodiment, the chuck housing 1104 and the rear housing 1103 are fixedly connected, that is, the chuck housing of the power tool is always non-rotating. In this way, when the power tool is working, the chuck extends When entering a narrow space, there is no need to worry about the collet housing contacting the outer wall of the narrow space, which makes the accessibility of the collet good. Preferably, both the handle case 1102 and the rear case 1103 are composed of a half case, and the half case of the rear case 1103 and the half case of the handle case 1102 are integrally formed, and the chuck case 1104 is a cylindrical case. (See Figure 1). It can be understood that, in other embodiments, the chuck housing 1104 may also be composed of two half housings, or the half housing on the same side of the chuck housing 1104, the rear housing 110, and the handle housing 1102 may be integrally formed. To form two symmetrical half shells that make up the chassis. Of course, it can be understood that, in other embodiments, the chuck housing 1104 can also be configured to be rotatable relative to the rear housing 1103. For example, when the power tool is working, the chuck housing 1104 rotates with the output device 15.

A button switch 19 is provided on an upper portion of the handle housing 1102 near the main housing 1101, and a battery 18 is fixed to a rear portion of the handle housing 1101. As a preferred embodiment, the battery 18 may be a lithium-ion battery. It should be noted that the lithium-ion battery mentioned here is based on lithium ion extraction-the general name of the rechargeable battery that is included in the reaction. Depending on the positive electrode material, it can constitute many systems, such as "lithium manganese" batteries, "lithium iron" "Batteries, etc. Of course, the battery may also be other types of batteries, such as nickel-cadmium, nickel-hydrogen and the like, which are well known to those skilled in the art.

The transmission mechanism includes at least one stage of a variable-speed planetary gear train, and the variable-speed planetary gear train includes a shifting ring gear capable of moving in a first shifting position and a second shifting position. When located in the first shift position, the transmission mechanism can output at a first transmission ratio; when located in the second shift position, the transmission mechanism can output at a second transmission ratio that is greater than the first transmission ratio.

In this embodiment, the transmission mechanism is specifically a planetary gear reduction mechanism 13, which has a drive shaft capable of outputting the power of the motor 12, so that the rotary motion output from the motor shaft of the motor 12 is decelerated to the output through the planetary gear reduction mechanism 13. The device 15 is further driven by the output device 15 to rotate the tool head so that the tool head outputs at a required speed.

With continued reference to FIGS. 1-6, the motor 12 has a motor shaft capable of outputting rotational power. In a preferred embodiment of the present invention, the motor 12 is a motor. The motor is fixed in the rear case 1103 through a positioning rib (not shown in the figure) and screws 17 in the casing. The motor has a forward direction from the rear case 1103. The extended motor shaft 121 extends into the planetary gear reduction mechanism 13 and is output after being decelerated by the planetary gear reduction mechanism 13.

Preferably, the planetary gear reduction mechanism 13 is a two-stage planetary gear reduction mechanism, which includes a first-stage planetary gear train 131 near the motor, and a second-stage planetary gear train 132 near the output device 15. The first stage planetary gear train 131 includes a first sun gear 1310 fixed to the motor shaft 121, a first planet gear 1311 meshing with the first sun gear 1310 and disposed on the outer periphery of the first sun gear 1310, and a first planet gear 1311. The meshed first ring gear 1312 and the first planet carrier 1313 for supporting the first planet gear 1311, the second stage planetary gear train 132 includes a second sun gear 1320 fixedly disposed on the first planet carrier 1313, and A second planetary gear 1321 meshed with the two sun gears 1320, a second ring gear 1322 meshed with the second planetary gear 1321, and a second planet carrier 1323 for supporting the second planetary gear 1321.

The output device 15 includes an output shaft 150. The output shaft 150 includes a main body 151, a clamping groove 153 disposed on the main body 151 and at a certain angle with respect to the axis of the output shaft 150, and a receiving hole for receiving a tool head. The output device 15 further includes a setting A plurality of clamping jaws and a regulating member screwed with the clamping jaws are arranged in the clamping groove and around the accommodating hole. The adjusting member defines an end of the chuck assembly 15 away from the motor 12 as a first end. Optionally, the adjusting member can be sleeved on the outer periphery of the plurality of clamping jaws, and the adjusting member is rotated relative to the outer periphery of the plurality of clamping jaws to realize axial movement along the clamping jaws. Of course, in other embodiments of the present invention, the adjusting member may be disposed on the inner periphery of the plurality of clamping jaws, and the adjusting member is rotated relative to the inner periphery of the plurality of clamping jaws to realize axial movement along the clamping jaws. Exemplarily, the adjusting member is sleeved on the outer periphery of the plurality of clamping jaws.

Preferably, the adjusting member includes a nut sleeve 154, an inner thread (not shown) is provided on an inner peripheral wall of the nut sleeve 154, and an external thread 1521 is provided on a side of the clamping jaw 152 facing the inner thread. When the clamping jaw 152 is rotated, the interaction between the internal thread and the external thread 1521 causes the clamping jaw 152 to open or close. Preferably, the nut sleeve 154 is rotatably but not axially disposed on the body 151. Preferably, a ring groove 1511 is provided on the upper and outer periphery of the body 151, and a nut sleeve 154 is rotatably provided in the ring groove (not shown in the figure), and the ring groove can limit the axial movement of the nut sleeve 154. Referring to FIG. 7, the body 151 includes a first flange 1512 and a second flange 1513 respectively located at two ends of the ring groove. The first flange 1512 can abut against the end of the nut sleeve 154 near the tool head to restrict the nut sleeve 154. Moving toward the end where the tool head is located (that is, moving forward), the second flange 1513 can axially limit the end where the nut sleeve 154 is close to the motor 12 to prevent the nut sleeve 154 from moving toward the motor (ie Move backwards). It can be understood that when the clamping jaw 152 clamps or closes the tool head, the nut sleeve 154 will increase the force from the clamping jaw 152 (jaw thread) when the nut sleeve 154 rotates, and the nut sleeve 154 has an axial rearward The tendency of movement, that is, the nut sleeve 154 will cause the second flange 1513 to bear a large backward axial force. For this reason, an end bearing 155 and a gasket are provided between the nut sleeve 154 and the second flange 1513. 156. Preferably, the gasket 156 is a wear-resistant metal gasket.

In this embodiment, to facilitate installation, the nut sleeve 154 is formed by splicing two half-circle half nut sleeves. Of course, in other embodiments, the arrangement manner of the nut sleeve 154 may also be composed of three or more half nut sleeves. Understandably, in order to effectively fix the two half nut sleeves together, a nut sleeve 157 is sleeved on the outside of the two half nut sleeves. In this embodiment, the diameter of the receiving hole is not less than 10 mm. Preferably, the diameter of the receiving hole is between 10 mm and 13 mm. It can be understood that, in other embodiments, the structure of the adjusting member may also be in other forms. For example, the threaded part of the adjusting member is located in the area surrounded by the clamping jaws, the clamping jaws are provided with internal threads, and the adjusting members are provided with External thread mating with internal thread.

Referring to FIG. 5 and FIG. 6, in this embodiment, the second ring gear 1322 (that is, equivalent to the speed change ring gear in this embodiment) can be located at a first speed change position (close to the motor) along the motor output shaft 121 with respect to the casing. (See Figure 6) and a second shift position (see Figure 5) away from the motor. When the second ring gear 1322 is located in the first shifting position, the second ring gear 1322 is rotatably disposed on the casing, and the second ring gear 1322 meshes with the first planet carrier 1313 and the second planet gear 1321 at the same time. Therefore, the first planetary carrier 1313, the second planetary gear 1321, and the second ring gear 1322 rotate together, and the second stage planetary gear train 132 has no deceleration output, that is, the second planetary carrier 1323 has the same rotation speed as the first planetary carrier 1313. The second planet carrier 1323 outputs high speed. When the second ring gear 1322 is located at the second shifting position, the second ring gear 1322 is fixed to the rear case 110 in a non-rotatable manner in the circumferential direction, and the second ring gear 1322 is in contact with the first planet during the axial movement. The carrier 1313 is disengaged but the second ring gear 1322 is still engaged with the second planetary gear 1321, so that the second planetary carrier 1323 outputs a predetermined reduction gear ratio relative to the first planetary carrier 1313, and the second planetary carrier 1323 outputs Low speed.

1 and 5, the first planet carrier 1313 includes a first pin (not shown) for mounting the first planet wheel 1311, a first planet carrier body 1314, and a first disc-shaped body 1314 disposed away from the first The first planet carrier output shaft 1315 on the surface of the pin. In this embodiment, the screwdriver further includes a gear box housing located on the outer side of the first-stage planetary gear train 131 and the second-stage planetary gear train 132 for encapsulating the first and second-stage

planetary gear trains

131 and 132, preferably The gearbox housing includes a gearbox rear cover 1121 for isolating the motor from the first-stage planetary gear train 131, and a gearbox circumferentially surrounding the first-stage planetary gear train 131 and the second-stage planetary gear train 132. The sleeve 1122 and the front end cover 1123 located between the second-stage planetary gear train 132 and the output device 15 are provided in the middle of the front end cover 1123 along the axial direction with a hollow support sleeve 1124 (see FIG. 1 or FIG. 3) The driving shaft 1325 of the second planetary carrier 1323 is rotatably disposed in the support sleeve 1124 and extends to the inside of the output device 15. Therefore, the hollow supporting sleeve 1124 can well perform the driving shaft 1325 of the second planetary carrier 1323. The support makes the output of the second stage planet carrier 1323 more stable. In other embodiments, a second rotary support 1327 such as a needle bearing or an oil bearing may be further provided between the outer wall of the driving shaft 1325 of the second planet carrier 1323 and the inner wall of the support sleeve 1324. Preferably, in order to better support the output device 15, the above-mentioned body 151 is rotatably supported outside the support sleeve 1324. In other embodiments, a third rotation support may be provided between the support sleeve 1324 and the body 151. Piece 1328. In order to support the output device 15 and the second planet carrier 1323 without increasing the axial length of the hand-held power tool to facilitate holding and operation, the support sleeve 1324 is used to support the second planet carrier 1323 and the support sleeve 1324. A portion for supporting the output device 15 at least partially axially overlaps or the second rotation support 1327 and the third rotation support 1328 overlap at least partially axially. Preferably, in this embodiment, the distance L1 from the side of the rear end cover close to the transmission mechanism to the side of the output shaft 150 away from the motor is not more than 80mm. In this embodiment, the length of the whole machine is not more than 145mm, that is, The length L2 from the tail end of the main casing 1101 to the head end of the main casing is not more than 145 mm. In this embodiment, if the chuck housing 1104 (front housing) is fixedly connected to the rear housing 1103, in order to further support the output device 15, that is, to further support the body 151, the body 151 and the chuck housing A first rotation support 16 is provided between the bodies 1104 (front casing) to support the body 151. Preferably, the first rotation support 16 is a support bearing, and the output device 15 is mounted on the first rotation support 16 and Under the action of the third rotating support 1328, the output shaft 150 is more stable in output and higher in working accuracy. The first rotating support 16 has an inner end near the adjusting member and an outer end far from the adjusting member, and the outer end is flush with the first end of the main casing 1101.

In this embodiment, the transmission mechanism includes an output planetary gear train. The output planetary gear train is rotatably fixed to the output planetary gear 1581 on the body 151. The output planetary gear 1581 is located outside the output planetary gear 1581 and meshes with the output planetary gear 1581. The shaft 1325 is provided with an output sun gear 1583 that meshes with the output planet gear 1581. In this embodiment, in order to facilitate processing and manufacturing of the output device 15, the body 151 includes a first body 1501a and a second body 151b rotatably connected to the first body 1501a. In order to meet the requirements between the first body 1501a and the second body 151b, The strength requirement during torque transmission, preferably, one of the first body 1501a and the second body 151b extends to the other body to form an extension 151c that at least partially axially overlaps the other body, and passes through the first body 1501a and the second body The overlapping portion of the body 151b abuts in the circumferential direction for torque transmission, and the first body 1501a and the second body 151b are fixedly connected by press-fitting. The first body 1501a is located between the planetary gear reduction mechanism 13 and the output planetary gear 1581.

1 and 4, in order to further shorten the axial length of the handheld power tool, the projection of the clamping groove 153 on the axis of the output shaft 150 and the projection of the output planetary wheel on the axis of the output shaft 150 at least partially overlap, that is, the clamping groove 153 is at least partially located on the extension 151c. Preferably, the projection of the clamping groove 153 on the axis of the output shaft 150 and the projection of the first body 1501a on the axis of the output shaft 150 at least partially axially overlap, that is, the clamping groove 153 is at least partially disposed on the first body 1501a to provide Space for the jaw 153 to move in the direction of the motor when opened. In other words, referring to FIGS. 3 and 4, the movement of the gripper 152 along the grip groove can move between the front end position in which the gripper 152 is closed and the rear end position in which the gripper 152 is fully opened, and when the gripper 152 moves to the rear end In the position, the projection of the clamping jaw 152 in the axial direction and the projection of the output planetary gear 1581 in the axial direction at least partially overlap. More preferably, in order to shorten the axial length of the body 151 as much as possible to shorten the axial length of the power tool, when the jaw 152 moves to the rear position, the distance from the end surface of the body 151 near the front cover to the front cover is L3 ( (Not shown in the figure), the distance from the part of the jaw close to the front cover to the front cover is L4 (not shown), and L3 ≤ L4, in other words, in order to shorten the axial length of the body as much as possible to shorten the Axial length, when the jaw 152 is moved to the rear end position (even when the jaw is fully opened), the rear end portion of the jaw 152 is axially rearward of the rear end portion of the body or the rear end of the jaw 152 The portion is flush with the rear end portion of the body in the axial direction.

Referring to FIG. 6, in this embodiment, the output device 15 further includes an output pin 1584 fixed on the body 151, and the output planetary gear 1581 is rotatably disposed on the output pin 1584. Preferably, in order to facilitate the assembly of the output device 15, the output pin 1584 may be selectively fixed to the first body 1501a or the second body 151b. In this embodiment, preferably, the output pin 1584 is close to one end of the first body 1501a. It is fixed to the first body 1501a. The end of the output pin 1584 near the second body 151b is spaced from the second body 151b. That is, the end of the output pin 1584 near the second body 151b is in a suspended state, and it is not fixed to the second body.体 151b. In order to reduce the friction between the end of the output planetary gear 1581 and the first body 1501a or the second body 151b, a washer 1337 is provided between the output planetary gear 1581 and the

first bodies

1501a and 151b (see FIGS. 1 and 7). Preferably, the gasket 1337 is a metal gasket. It should be noted that the output pin 1584 may also be fixed on the second body 1335, or one end of the output pin 1584 is fixed on the first body 1501a, and the other end is fixed on the second body 151b. It can be understood that, in other embodiments, the structure of the output device 15 may also be in other forms, and details are not described herein again.

In this embodiment, the screwdriver further includes a mode selection mechanism. The mode selection mechanism is operable to switch the screwdriver between at least a drilling mode (hereinafter referred to as a drill mode) and a chuck adjustment mode (hereinafter referred to as an auto chuck mode). When the screwdriver is in the drill mode, the power of the motor 12 drives the body 151, the clamping jaw 152, the adjustment member and the tool head (screwdriver head) together to perform the work through the drive shaft; when the screwdriver is in the autochuck mode, the nut One of the sleeve 154 and the main body 151 can be driven by the motor 12 to rotate relative to the other, so as to move the plurality of clamping jaws 152 relative to the main body 151 to perform a closing or opening action. Preferably, the main body 151 and the main body 151 and The clamping jaw 152 in 151 does not rotate, and the nut sleeve 154 rotates relative to the clamping jaw 152 to make the clamping jaw 152 close or open.

The output sun gear 1583 is located on the second planet carrier drive shaft 1325 protruding from the outside of the hollow support sleeve 1124 and meshes with the output planet gear 1581 provided on the body 151 to transmit the rotation of the second-stage planetary gear train 132 to the output装置 15。 Device 15. In this embodiment, the output ring gear 1332 has a first working position that is close to the motor in the axial direction and a second working position that is far from the motor. See FIGS. 4-5. When the screwdriver is in drill mode, the output ring gear 1582 is located at the first position. In a working position, the output ring gear 1582 is non-rotatable and fixed relative to the casing, that is, the output ring gear 1582 cannot be rotated relative to the casing, and the output ring gear 1582 meshes with the output planetary gear 1581. Therefore, the output sun gear 1583 transmits the rotation to the output planet gear 1581, and the output planet gear 1581 drives the body 151, the clamping jaw, and the tool head located in the body 151 to rotate under the action of the fixed output ring gear 1582.

Referring to FIGS. 3-4, when the screwdriver is in the autochuck mode and the output ring gear 1582 is in the second working position, the output ring gear 1582 is still engaged with the third planetary gear 1331, but can be rotated relative to the casing, that is, When the output ring gear 1582 is in the second working position, the output planetary gear 1581 transmits rotation to the output ring gear 1582, so that the output ring gear 1582 rotates relative to the casing. In the second working position, the output ring gear 1582 can simultaneously transmit rotation to the nut sleeve 154 to rotate the nut sleeve 154 relative to the clamping jaw 152, so that the clamping jaw 152 can perform an opening or closing action as required.

It can be known from the above description that in the autochuck mode, when the output ring gear 1582 is in the second working position, the output planetary gear 1581 transmits the rotation to the output ring gear 1582 and further transmits the rotation to the nut sleeve 154 through the output ring gear 1582 to make the nut The sleeve 154 rotates relative to the body 151 (clamping claw 152) which does not rotate at this time, so that the clamping claw 152 can perform an opening or closing action as required. Preferably, in this embodiment, the body 151 is selectively locked to the casing so that the nut sleeve 154 can rotate relative to the body 151 and the clamping jaw 152 provided in the body 151. Preferably, in this embodiment, the first The main body 1501a is selectively locked to the casing to realize the fixing of the main body 151 relative to the casing.

Referring to FIG. 1, in order to realize that the first body 1501a is fixed relative to the casing in the autochuck mode, the mode selection mechanism includes a locking element for fixing the first body 1501a, and the locking element is always fixed to the casing in a non-rotatable circumferential direction. However, it can be moved axially relative to the casing to switch between the first lock position and the second lock position. Preferably, in this embodiment, the lock element is moved in the axial direction to realize the lock element in the first lock position. Switch between the position and the second lock position, and the first lock position is close to the first body 1501a, and the second lock position is far from the first body 1501a. Referring to FIG. 3 and FIG. 4, when the screwdriver is in an autochuck mode, the locking element is located at the first locking position, and the locking element locks the first body 1501a to the casing in a non-rotatable manner in the circumferential direction. Referring to FIGS. 4-5, when in the drill mode, the locking element is located at the second lock position, the locking element releases the circumferential lock on the first body 1501a, and the output planetary wheel 1581 can drive the body 151 and the inside of the body 151. The jaws 152 rotate together. It should be noted that according to the above description, in this embodiment, since the output ring gear 1582 is in a first working position that is not rotatable relative to the casing in the drill mode, the mode selection mechanism further includes the output ring gear 1582 The structure fixed to the casing in the first working position, such as an internal ring gear lock. In order to simplify the internal structure of the screwdriver in this embodiment, the locking element can also be used to circumferentially fix the output ring gear 1582. In the embodiment, the locking element also functions as an internal ring gear lock, that is, the locking element includes a body lock 134 for locking the body and an internal ring gear lock 181 for locking the output ring gear 1582.

The structure of the locking element and how the locking element functions as the body lock 134 and the ring gear lock (not labeled in the figure) in the drill mode and the autochuck mode will be described in detail below with reference to the drawings. Referring to FIGS. 4-5, in the drill mode, when the locking element is in the second lock position, the output ring gear 1582 is in the first working position. At this time, the locking element (body lock 134) releases the circumferential lock on the first body 1501a, and at the same time is connected to the output ring gear 1582 and the output ring gear 1582 is non-rotatably fixed to the casing, so that the output planetary gear 1581 The body 151 and the clamping jaw 152 can be driven to rotate, that is, the body lock 134 is separated from the first body 1501a, and the ring gear lock is connected to the output ring gear 1582. Preferably, the ring gear lock includes a through groove 1340 provided on the inner wall of the locking element. The output ring gear 1582 is provided with a ring gear lock tooth 1582a that cooperates with the through groove 1340, the above-mentioned through groove 1340 of the body lock 134, and the output tooth The ring gear locking tooth 1582a at the end of the ring 1582 realizes the circumferential fixing of the output ring gear 1582, that is, the ring gear locking tooth 1582a of the output ring gear 1582 is inserted into the corresponding axial through groove 1340 to achieve the fixing of the output ring gear. At this time, the output sun gear 1583 transmits torque to the third planet gear 1331, and under the action of the output ring gear 1582, the output planet gear 1581 revolves around the output sun gear 1583 to drive the body 151 and the clamping jaw 152 to rotate, and through the clamp The claw 152 drives the tool head to work. Of course, it can be understood that, in other embodiments, the main body lock and the fourth locking member matched with the main body lock may also be in other forms, and details are not described herein again.

When the screwdriver passes the mode selection mechanism from the drill mode to the autochuck mode, the locking element is moved from the second lock position toward the first body 1501a (backward movement) to the first lock position to achieve the first The body 1501a is locked while the output ring gear 1582 is moved from the first working position away from the first body 1501a and close to the nut sleeve 154 (forward) to the second working position to achieve separation from the ring gear lock and from the nut sleeve 154 rotary connection. Preferably, the first body 1501a is provided with a first locking member mated with the body lock 134. In this embodiment, the first locking member is a lock block 1510 provided on the first body 1501a, and the body lock 134 is provided with The second locking member mated with the first locking member, preferably the second locking member is the aforementioned through groove 1340, that is, the locking element (body lock 134) is mated with the lock block 1510 through the through groove 1340 to realize the first body. 1501a lock. Therefore, in the autochuck mode, when the locking element is in the first locking position, the output ring gear 1582 is in the second working position. At this time, the locking element circumferentially locks the body 151 and the clamping jaw 152, and the output ring gear 1582 is driven. The nut sleeve 154 rotates relative to the jaw 152.

Referring to FIG. 1 and FIG. 6, in this embodiment, in the autochuck mode, in order to ensure that after the clamping jaw 152 clamps the tool head or after the clamping jaw 152 has been released, the clamping jaw 152 will not continue to clamp or continue to open. That is, the nut sleeve 154 does not continue to apply torque to the clamping jaw 152, and the output ring gear 1582 and the nut sleeve 154 are provided between the output ring gear 1582 and the nut sleeve 154 after the clamping jaw 152 is clamped or fully opened. Clutch mechanism 20 for intermittent torque transmission. The clutch mechanism 20 includes a first clutch member 21 capable of being rotatably connected to the output ring gear 1582, and a second clutch member 22 rotatably connected to the nut sleeve 154 and axially movable relative to the nut sleeve 154. After being clamped or fully opened at 152, the second clutch member 22 moves axially forward, the first clutch member 21 is disengaged from the second clutch member 22, and the output ring gear 1582 no longer transmits torque to the nut sleeve 154. Preferably, the first clutch member 21 is a snap ring sleeved on the outer periphery of the body 151, wherein an end of the snap ring near the output ring gear 1582 is provided with an engaging tooth that cooperates with the internal teeth of the output ring gear 1582 to achieve torque transmission. 211. An end of the snap ring near the second clutch member 22 is provided with a clutch moving end tooth 212 for torque transmission with the second clutch member 22. The second clutch member 22 is provided with a clutch static end tooth 222 which cooperates with the clutch moving end tooth 212, and the front end of the second clutch member 22 is provided with a clutch elastic member 23, so that when the clamping jaw 152 is clamped or fully opened, That is, when the torque between the first clutch member 21 and the second clutch member 22 increases to a predetermined value, the second clutch member 22 compresses the clutch elastic member 23 so that the clutch end teeth 212 and the clutch static end teeth 222 are spaced between them. Disconnect. After the second clutch member 22 is disengaged from the first clutch member 21, the second clutch member 22 moves backward under the action of the clutch elastic member 23, that is, it automatically resets and pushes the second clutch member 22 to the clutch end tooth 212 The meshing position with the clutch static end tooth 222. Therefore, after the clamping claw 152 is clamped or fully opened, the clutch mechanism 20 performs a repeated automatic trip operation.

Referring to FIG. 1, the clutch moving end teeth 212 and the clutch static end teeth 222 include a guide inclined surface (not shown in the figure). The guide inclined surface enables the second clutch member 22 to compress the clutch elastic member 23 to make the first clutch member 21 and the second The clutch 22 is separated. It should be noted that when the clamping jaw 152 is clamped or fully opened, the guide inclined surface will also cause the first clutch 21 to move closer to the motor, that is, the first clutch 21 will be subjected to a backward movement. Axial force, in order to prevent the first clutch 21 from moving backward to press the output ring gear 1582 (It should be noted that when the output ring gear 1582 receives an axial force from the first clutch when it is tripped, it also That is, when receiving the clutch force, the output ring gear 1582 will also give an axial force to the mode selection mechanism that drives its movement, such as an axial force to the operating member that drives the output ring gear 1582, so that the operating member will be stressed), The screwdriver 10 further includes an axial abutting member that abuts axially with the first clutch member 21. Preferably, the axial contact member is a third flange 1514 (see FIG. 7) provided on the body 151.

From the above description of the working principle of the electric screwdriver in the drill mode and the autochuck mode, it can be known that when in the chuck adjustment mode, the body 151 is fixed relative to the casing, and the

clutch members

21 and 22 can transmit the rotational power of the motor to The adjusting member thus enables the adjusting member to rotate relative to the body, and when the rotational force transmitted between the first clutch member and the second clutch member reaches a predetermined value (that is, after the chuck is clamped or opened in place), the above clutch At least one of the

members

21 and 22 moves against the force of the clutch elastic member 23 to disconnect the first clutch member 21 and the second clutch member 22, thereby disconnecting the connection between the transmission mechanism and the adjusting member in the rotation direction; When in the drilling mode, the

clutch members

21 and 22 cannot transmit the rotation power of the motor to the adjustment member, and the body 151 is connected to the motor in the rotation direction and drives the gripper 152 and the adjustment member to rotate to drive the tool head to perform work. Therefore, whether the electric screwdriver is in the drill mode or the autochuck mode, the first clutch member 21 and the second clutch member 22 are always engaged by the clutch elastic member 23, and only when the jaw is completely opened or closed, the first Only the two clutch members 22 overcome the force of the clutch elastic member 23 and separate from the first clutch member. Therefore, the degree of engagement between the first clutch member 21 and the second clutch member and the trip force are mainly affected by the clutch elastic member 23. The magnitude of the clutch "trip" force is relatively constant, even if the first clutch member and the second clutch member The magnitude of the predetermined rotational force for the clutch to separate is relatively stable.

The operation member 30 and the structure related to the operation member 30 of the mode selection mechanism in this embodiment will be further described below with reference to FIGS. 8 to 23. According to the above description of the "trip" principle of the clutch mechanism 20 in the autochuck mode, it can be known that under the action of the clutch elastic member 23, the clutch static end teeth 222 and the clutch movable end teeth 212 repeatedly engage and disengage, which results in Loud noise, and the sound can be very harsh, especially at higher speeds. In this embodiment, the chute for moving the operating member 30 in the mode selection mechanism is set, so that the screwdriver can be in the autochuck mode only in the low-speed mode. At this time, the operation member 30 is equivalent to a mode selection member of a mode selection mechanism, and a switch operation between the drill mode and the autochuck mode of the hand-held power tool is realized by dialing the operation member 30. Referring to FIG. 8 to FIG. 13, the chute has a first chute 311 for switching between the high-speed position and the low-speed position of the operating member in the drill working mode, and when the operating member 30 slides at the high-speed position and the low-speed position, the operating member 30 The second ring gear 1322 can be driven to move between the first shift position and the second shift position. In addition, the chute also includes a second chute 312 for switching to the autochuck mode. The second chute 312 is connected to the corresponding low-speed position in the first chute 311, so that the operating member 30 can only follow the low-speed position. The second chute 312 moves to switch from the drill mode to the autochuck mode. Preferably, the second sliding groove 312 is two sections, which are respectively disposed on both sides of the first sliding groove 311 to realize the clamping groove 3121 of the clamping jaw 152 in the autochuck mode and the opening groove 3122 for releasing the clamping jaw, respectively. . Preferably, the first sliding groove 311 extends along the axial direction of the motor shaft 121 on the casing, and the second sliding groove 32 is distributed on both sides of the first sliding groove 311 and is substantially perpendicular to the first sliding groove 311. Therefore, the slide groove is roughly a "T" groove structure on the housing.

Referring to FIG. 14 to FIG. 16, in the present embodiment, in the drill mode, the operating member 30 drives the second ring gear 1322 to move between the first shift position and the second shift position through a connecting component in the casing, preferably The connecting assembly includes an arc-shaped shifting wire 41 and a sliding member 42 that connects the shifting wire 41 and the operating member 30 and can be moved axially under the driving of the operating member 30. The two free ends of the shifting wire 41 are respectively located at the second In the ring groove 1326 of the ring gear 1322, the second ring gear 1322 is moved by the shift wire 41. In order to allow the slider 42 to move along the predetermined path in the casing, a gear box housing is provided for sliding Piece 42 moves the slide rail 1125 axially. Preferably, the sliding member 42 is disposed between the two free ends of the shift wire 41, and the shift wire 41 is pivotally connected to the gear box housing at a middle position between the sliding member 42 and the free end. In this embodiment, the operating member 30 and the sliding member 42 can rotate relative to each other, that is, when the operating member 30 can rotate relative to the sliding member 42 to switch the screwdriver from the drill mode to the autochuck mode. Preferably, the sliding member 42 is provided with an arc-shaped groove 421 along the circumferential direction, and the front end of the operation member 30 is provided with a guide block 300 that cooperates with the arc-shaped groove. When the operation member 30 is switched between the high speed position and the low speed position, the guide block 300 The arc-shaped groove 421 drives the sliding member 42 to move axially; when the operating member rotates at a low-speed position, that is, the operating member 30 moves along the second sliding groove at a low-speed position, the guide block 300 can rotate in the arc-shaped groove 421 so that The operation member 30 rotates with respect to the slider 42.

Preferably, the mode selection mechanism further includes a switching ring 43 sleeved on the outside of the gear box housing and capable of being driven and rotated by the operating member 30, a guide member (not shown in the figure), a push rod assembly 45, and the above-mentioned both capable of locking the body 151 It can also lock the locking element of the output ring gear 1582. Preferably, the switching ring 43 is provided with a slot 431, so that the operating member 30 can move axially along the slot 431 to achieve the high-speed position and the low-speed position in the drill mode. When the operating member 30 moves along the second chute at a low speed position, that is, when the operating member 30 rotates in the circumferential direction, the operating member 30 abuts the switching ring 43 in the circumferential direction during the rotation to make the switching ring 43 Rotating together, the switching ring 43 is provided with a first guide groove 4321 and a second guide groove 4322. The push rod assembly 45 includes a first push rod assembly 451 connected to the locking element and a second push rod assembly 452 connected to the output ring gear 1582. Preferably, the guide is a switching pin, and the switching pin includes a connection to the first The push rod assembly 451 and the first switch pin 4514 of the first guide groove 4321 and the second switch pin 4524 connected to the second push rod assembly 452 and the first guide groove 4322.

Referring to FIG. 8 to FIG. 11 and FIG. 18 to FIG. 21, when the operating member 30 is switched from the position shown in FIG. 10 to the position shown in FIG. 8, that is, the low-speed state of the drill mode is switched to the gripper 152 in the auto-chuck mode. In the open state, the switching ring 43 rotates with the operating member 30 in the direction of the arrow L in FIG. 11 under the action of the operating member 30. The first guide groove 4321 on the switching ring 43 passes through the first switching pin 4514 and the first push rod. The component 451 drives the locking element to move axially backward, and at the same time, the second guide groove 4322 on the switching ring 43 drives the output ring gear 1582 to move forward axially through the second switching pin 4524 and the second push rod assembly 452 to The body 151 is fixed and the output ring gear 1582 and the nut sleeve 154 are rotationally connected. Preferably, in this embodiment, the switching ring 43 is further provided with an opening trigger 433 and a locking trigger 434. After the output ring gear 1582 and the locking element move to a predetermined position, opening the trigger 433 triggers the motor reversing switch. 435 causes the motor to drive the nut sleeve 154 to rotate in a predetermined direction to open the clamping jaw 152. Referring to FIGS. 10 to 12 and 19 to 21, when the operating member 30 is switched from the position shown in FIG. 10 to the position shown in FIG. 12, that is, the low speed state of the drill mode is switched to the gripper 152 in the auto chuck mode. In the closed state, the switching ring 43 triggers the motor reversing switch 435 through the locking trigger 434 connected to the switching ring 43 so that the motor drives the nut sleeve 154 to rotate in a predetermined direction to perform the closing action of the clamping jaw 152. The claws 152 are basically the same when opened, and will not be repeated here.

Referring to FIG. 23, preferably, the first push rod assembly 451 includes a first link 4513 connected to the first switching pin 4514 and is connected to the locking element through the first link 4513 to drive the locking element to move axially forward and backward. Preferably, the first push rod assembly 451 further includes a first self-aligning element 4510, wherein the first self-aligning element 4510 includes a first push rod 4511 connected to the first switching pin 4514 and disposed on the first push rod 4511. The first elastic element 4512 at the front end is located between the first push rod 4511 and the first link 4513. When the first switching pin 4514 moves forward, it can push the first link 4513 to move forward through the first push rod 4511 and the first elastic element 4512 located at the front end of the first push rod 4511. Preferably, the first connecting rod 4513 extends radially in front of the first elastic element 4512 with a first blocking member 4518 (see FIG. 1), and the first elastic element 4512 abuts on the first blocking member 4518. The first connecting rod 4513 is provided with an axially extending connecting rod slot 4515 (see FIG. 20), and the first switching pin shaft 4514 passes through the connecting rod slot 4515 so that the first switching pin shaft 4514 is in the first guide slot. 4321 can drive the first connecting rod 4513 to move backward when it moves backward and provides space for the first switching pin 4514 to move when the first switching pin 4514 moves forward. The second push rod assembly 452 includes a second link 4523 connected to the second switching pin 4524, and is connected to the output ring gear 1582 through the second link 4523 to drive the output ring gear 1582 to move back and forth axially.

Referring to FIG. 22, preferably, the second push rod assembly 452 further includes a second self-aligning element 4520, wherein the second self-aligning element 4520 includes a first push rod 4511 connected to the second switching pin 4524 and disposed on the first A second elastic element 4522 at the front end of the two push rods 4521 and located between the second push rod 4521 and the second link 4523. When the second switching pin 4524 moves forward, it can push the second link 4523 to move forward through the second push rod 4521 and the second elastic element 4522 located at the front end of the second push rod 4521. A second resisting member 4528 (see FIG. 1) extends radially in front of the second elastic member 4522 from the second link 4523, and the second resilient member 4522 abuts on the second resisting member 4528. The second connecting rod 4523 is provided with a second connecting rod slot 4525 (see FIG. 1) extending axially, and the second switching pin shaft passes through the second connecting rod slot 4525 so that the second switching pin shaft 4524 is at the first When the two guide grooves 4322 move backward, the second link 4523 can be driven to move backward and provide the second switching pin 4524 with space for movement when the second switching pin 4524 moves forward. In this embodiment, by setting the first push rod assembly 451 to the first self-aligning element 4510, the locking element can be moved forward to mesh with the output ring gear 1582. When the "top tooth" phenomenon occurs, after the output ring gear 1582 rotates a certain angle Through the first self-aligning element 4510, the locking element and the output ring gear 1582 smoothly mesh into position. Understandably, by setting the second push rod assembly 452 to the second self-aligning element 4520, the line output ring gear 1582 can be moved forward and the “top tooth” phenomenon occurs during the meshing process with the meshing teeth 211 of the first clutch 21. After the output ring gear 1582 rotates a certain angle, the second self-aligning element 4520 is used to smoothly mesh the output ring gear 1582 with the meshing teeth 211 in place.

Refer to 18-FIG. 21, where FIGS. 18 and 19 are state diagrams of the corresponding relationship between the switching ring 43 and the switching pin in the drill mode, and the screwdriver in FIG. 18 is in a high-speed state, and the screwdriver in FIG. 19 is in a low-speed state. 20 and FIG. 21 are state diagrams corresponding to the switching ring 43 and the switching pin in the autochuck mode, that is, FIG. 19 is a state diagram corresponding to FIG. 10, and FIG. 20 is a state diagram corresponding to FIG. 8. 21 is a state diagram corresponding to FIG. 12. When the operating member 30 is switched from FIG. 10 to FIG. 8, the switching ring 43 is turned from the state shown in FIG. 19 in the direction of arrow B in FIG. 19 to the state shown in FIG. 20. At this time, the first guide groove 4321 passes through the first The switching pin 4514 drives the first push rod 4511 to move forward. When the first push rod 4511 moves forward, the first push rod 4511 compresses the first elastic element 4512 and presses the first link 4513 through the first elastic element 4512. The locking element is driven forward by the first link 4513, and the second guide groove 4322 drives the second push rod 4521 to move backward through the second switch pin 4524, and the second push rod 4521 or the second switch pin 4524 Drive the second link 4523 to move backward. When the switching ring 43 is turned from the state shown in FIG. 19 in the direction of the arrow F in FIG. 19 to the state shown in FIG. 21, the first guide groove 4321 drives the first push rod 4511 to move forward through the first switching pin 4514. When a push rod 4511 moves forward, the first push rod 4511 compresses the first elastic element 4512 and presses the first link 4513 through the first elastic element 4512 to drive the locking element to move forward through the first link 4513. Referring to FIG. 20, preferably, a gearbox housing is provided with a first groove 1126 extending axially on the outer side thereof, and the first push rod 4511 and the first elastic element 4512 are located in the first groove 1126 so as to be able to move along the first groove 1126. A groove 1126 performs axial movement. The first link 4513 is located in the first groove 1126 and is disposed above the first push rod 4511 and the first elastic element 4512. A second groove 1127 extending axially is also provided on the outer side of the gear box housing. The second push rod 4521 and the second elastic element 4522 are located in the second groove 1126 so as to enable the shaft to follow the second groove 1127. The second connecting rod 4523 is located in the second groove 1127 and covers the second push rod 4521 and the second elastic element 4522. Preferably, the first putter assembly 451 and the second putter assembly 452 are at least two groups.

Understandably, in other embodiments, the first switching pin 4514 may also be directly connected to the first connecting rod 4513 directly, so that the axial movement of the first switching pin 4514 directly drives the first connecting rod 4513. Axial motion. However, compared with the first switching pin 4514 described above, which is connected to the first self-aligning element 4510, when the first switching pin 4514 moves forward, it contacts the first elastic element 4512 through the first pusher 4511 and further passes the first An elastic element 4512 pushes the first link 4513 forward. In the above manner, after the operation member 30 is operated in place, if the slot 1340 on the locking element does not mesh with the lock block 1510 on the first body 1501a, That is to say, the "top teeth" phenomenon. Because of the existence of the first elastic element 4512, after the body 151 rotates, the compressed first elastic element 1322 will continue to push the first link 4513 to make the slot 1340 of the locking element again. Engages with the lock block 1510 on the first body 1501a.

Figures 24 to 26 show a screwdriver 10 'according to a second embodiment of the present invention. This embodiment discloses another way to realize that in the autochuck mode, the body 151' is rotated and fixed by the body lock 134 'while outputting teeth The ring 1582 ′ drives the nut sleeve 154 ′ to rotate; in the drill mode, the body lock 134 ′ releases the fixing of the body 151 ′, and at the same time the output ring gear 1582 ′ is fixed relative to the casing, and the body 151 ′ is driven by the motor to drive the gripper 152 ′ Turn to realize the rotation of the tool head, and it is not necessary to move the output ring gear 1582 ′ axially when the mode is switched, so that the output ring gear 1582 ′ can be stably fixed in the housing, so that the output of the screwdriver 10 ′ is more stable.

The operating element in this embodiment is different from the above-mentioned first embodiment in that the operating element includes a speed operating element (not shown in the figure) for speed adjustment in drill mode, and the mode selecting mechanism includes a mode selecting element 301 ′ and a switching ring 43. ′, A body lock 134 ′ for locking the body, a third switching pin 4534 ′, a third push rod assembly 453 ′, a connecting member 182 ′, and an inner ring gear lock 181 ′.

Specifically, the same as the first embodiment described above is that the body lock 134 ′ is always fixed to the casing in a non-rotatable circumferential direction, but can be axially moved relative to the casing to be between the first lock position and the second lock position. The body lock 134 ′ is switched between the first lock position and the second lock position by moving in the axial direction, and the first lock position is close to the first body 1501a ′ and the second lock position is far from the first lock position. A body 1501a ′. When the screwdriver is in the autochuck mode and the body lock 134 ′ is in the first lock position, the body lock 134 ′ locks the body 151 ′ circumferentially to the casing. When in the drill mode, the body lock 134 ′ is located at the first position. In the second lock position, the body lock 134 'releases the circumferential lock on the first body 1501a', and the output planet gear 1581 'can drive the body 151' and the clamping jaw 152 'holding the tool head to rotate together.

Preferably, the mode selection member 301 ′ is a rotating ring sleeved on the outside of the casing, the switching ring 43 ′ is rotatably connected to the mode selection member 301 ′, and the switching ring 43 ′ is provided with a third guide groove 432 ′. In other embodiments, the switching ring 43 ′ and the mode selection member 301 ′ may be integrally formed, that is, the guide groove 432 ′ is provided on the inner wall of the switching ring 43 ′, and the guide groove 432 ′ is used to be driven by the third switching pin 4534 ′. The third push rod assembly 453 'realizes an axial movement. One end of the third push rod assembly 453 ′ is movably disposed in the third guide groove 432 ′ through the third switching pin 4534 ′, and the other end is connected to the connecting member 182 ′ for driving the connecting member 182 ′ to move axially. The connecting piece 182 'can be moved between a first switching position close to the ring gear lock 181' and a second switching position away from the ring gear lock 181 '. The connecting piece 182' is always in contact with the output tooth during the axial movement. The ring 1582 'is rotationally connected. The inner ring gear lock 181 ′ is fixed in a non-rotatable manner relative to the casing. When the connecting member 182 ′ is in the first switching position, the connecting member 182 ′ is rotatably connected to the inner ring gear lock 181 ′ and passes through the inner ring gear lock 181 ′. Limit the rotation of the output ring gear 1582 ′, that is, the output ring gear 1582 ′ is fixed relative to the casing circumferentially at this time; when the connecting member 182 ′ is in the second switching position, the connecting member 182 ′ and the internal ring gear lock 181 ′ shaft To the direction of separation, the output ring gear 1582 'can drive the connecting member 182' to rotate together.

In this embodiment, in order to realize that the mode selection member 301 ′ causes the third push rod assembly 453 ′ to drive the connecting member 182 ′, the body lock 134 ′ can also be moved to the corresponding position. Preferably, the body lock 134 ′ is connected to A third elastic element 135 ′ is also provided between the piece 182 ′ and the body lock 134 ′ between the end remote from the output ring gear 1582 ′ and the casing. After the connecting member 182 ′ moves axially, the connecting member 182 ′ no longer axially contacts the body lock 134 ′, and the body lock 134 ′ can move axially under the action of the third elastic element 135 ′. After the movement, the connecting member 182 'pushes the body lock 134' back to the corresponding position by overcoming the force of the third elastic element 135 '.

The principle of switching between the drill mode and the autochuck mode of the screwdriver 10 'will be further described below with reference to Figs. 24-26.

Referring to FIG. 25, when the screwdriver is in a drill mode, the body lock 134 ′ is located at a second lock position away from the first body 1501a ′, and the body lock 134 ′ is axially separated from the first body 1501a ′, that is, the body lock 134 ′ is not The first body 1501a ′ is locked, so that the body 151 ′ is rotatably disposed in the casing; at the same time, the connecting member 182 ′ is located at a first switching position near the ring gear lock 181 ′, and the connecting member 182 ′ The locking tooth 1821 ′ (see FIG. 24) meshes with the ring gear fixing tooth 1811 ′ on the inner peripheral wall of the ring gear lock 181 ′, and the output ring gear 1582 ′ is non-rotatably fixed to the casing. Therefore, the planet is output in this mode The wheel 1581 ′ drives the body 151 ′ and the clamping jaw 152 ′ to rotate, and further drives the tool head located in the clamping jaw 152 ′ to work.

When the rotation mode selector 301 ′ is in the autochuck mode, that is, when the screwdriver 10 ′ is switched from the state shown in FIG. 25 to the state shown in FIG. 26, the mode selector 301 ′ drives the switching ring 43 ′ to rotate, and the third pusher The assembly 453 ′ drives the connecting member 182 ′ to move away from the ring gear lock 181 ′ under the action of the third guide groove 432 ′ of the switching ring 43 ′, that is, the connecting member 182 ′ moves forward from the first switching position to the first In the second switching position, the locking tooth 1821 ′ on the outer periphery of the connecting member 182 ′ is disengaged from the inner ring fixing tooth 1811 ′ on the inner peripheral wall of the inner ring lock 181 ′, and the output ring gear 1582 ′ can drive the connecting member 182 ′ together. Rotate relative to the case. It should be noted that when the connecting member 182 ′ is moved forward from the first switching position to the second switching position, the connecting member 182 ′ is simultaneously connected to the nut sleeve 154 ′, so the rotation of the output ring gear 1582 ′ can drive the nut The sleeve 154 'rotates. Because the connecting member 182 ′ abuts axially with the body lock 134 ′, when the connecting member 182 ′ is moved forward from the first switching position to the second switching position, the body lock 134 ′ is under the action of the third elastic element 135 ′ Moving from a first lock position away from the first body 1501a ′ to a second lock position close to the first body 1501a ′, the body lock 134 ′ is connected with the first body through the planet carrier lock teeth (not shown in the figure) on its inner peripheral wall. The locking block 1510 'on 1501a' is engaged to realize the locking of the first body 1501a '. Therefore, in this mode, the output ring gear 1582 ′ can be rotated relative to the fixed first body 1501 a ′ and the clamping jaw 152 ′ through the connecting member 182 ′, thereby achieving the opening or closing action of the clamping jaw 152 ′.

When continuing to rotate the mode selector 301 ′, when the screwdriver is switched from auto mode to drill mode, the mode selector 301 ′ drives the switching ring 43 ′ to rotate, and the rotation of the switching ring 43 ′ causes the third pusher assembly 453 ′ to overcome the third The elastic force of the elastic element 135 ′ drives the connecting member 182 ′ and the body lock 134 ′ abutted by the first connecting member 182 ′ to move backward together, so that the screwdriver returns to the drill mode. Preferably, when the connecting member 182 ′ is moved backward from the second switching position to the first switching position, the locking teeth 1821 ′ on the outer periphery of the connecting member 182 ′ can smoothly fix the teeth with the inner ring gear of the inner ring gear lock 181 ′. 1811 ′ meshes, a fourth elastic element (not shown in the figure) is provided on the rear side of the ring gear lock 181 ′, so that the locking teeth 1821 ′ on the outer periphery of the connecting member 182 ′ and the ring gear of the ring gear lock 181 ′ When the “top teeth” of the fixed tooth 1811 ′ appear, the connecting piece 182 ′ is compressed by the ring gear lock 181 ′ to rotate the fourth elastic element, and the ring gear lock 181 ′ is engaged in position after the rotation.

This embodiment further includes a clutch mechanism 20 ′ for disconnecting the torque transmission between the output ring gear 1582 ′ and the nut sleeve 154 ′ when the clamping jaw 152 is locked or opened. The clutch mechanism 20 ′ includes a coupling mechanism 182 ′ The first clutch 21 'that is rotationally connected to the connecting member 182' after the front movement and the second clutch 22 'that is rotationally connected to the nut sleeve 154'. The first clutch 21 'and the casing at the front end thereof are provided. Clutch elastic member 23 '. After the clamping jaw 152 ′ is locked or fully opened, the first clutch member 21 ′ moves forward against the elastic force of the clutch elastic member 23 ′ to disconnect the torque between the first clutch member 21 ′ and the second clutch member 22 ′. transfer.

It should be noted that in the second embodiment of the present invention, the output ring gear 1582 ′ does not need to be moved axially during the mode switching, that is, the output ring gear 1582 ′ is axially opposite to the casing motor shaft. Fixed, the mode selection member 301 ′ is operatively moved between the first position and the second position to drive the connection member 182 ′, so that the connection member 182 ′ is connected to the output ring gear 1582 ′ in the rotation direction in the chuck adjustment mode. And the clutch member, and the connection member 182 'in the drilling mode disconnects the connection between the output ring gear 1582' and the clutch members 21 ', 22' in the rotation direction. Because the inner peripheral teeth of the output ring gear 1582 ′ need to mesh with the outer ring teeth of the output planetary gear 1581 ′, in general, the meshing between the inner peripheral teeth of the output ring gear 1582 ′ and the outer ring teeth of the output planetary gear 1581 ′ The smaller the clearance, the more stable the transmission, but when the output ring gear 1582 ′ needs to move axially, the meshing gap must be increased, otherwise the axial movement of the output ring gear will be blocked or more difficult, which makes the transmission stability worse. . In the second embodiment of the present invention, the axial movement is performed by the connecting member 182 ′, thereby avoiding the problem of poor transmission stability caused by the axial movement of the output ring gear 1582 ′.

FIGS. 27-30 show a partial cross-sectional view of a screwdriver 10 ″ of a third embodiment of the present invention. This embodiment discloses another way to realize the rotation of the body 151 ″ through the body lock 134 ″ in the autochuck mode, while The output ring gear 1582 ″ drives the nut sleeve 154 ″ to rotate and the body lock 134 ″ unlocks the body 151 ″ in the drill mode. At the same time, the output ring gear 1582 ″ is fixed relative to the casing, and the body 151 ″ drives the clip under the drive of the motor. The claw 152 ″ is rotated to realize the rotation of the driving tool head.

The mode selection mechanism in this embodiment includes a mode selection member 301 ″, a switching ring (not shown) provided with a guide groove (not shown), a guide member, a connecting member 182 ″, a body lock 134 ″, and an inner Ring gear lock. Preferably, the mode selection member 301 ″ is a rotating ring sleeved on the outside of the casing or chuck housing, and the guide member includes a third switching pin 4534 ″ for driving the connecting member 182 ″ to move axially, The guide groove includes a third guide groove 432 "for moving the third switching pin 4534". Preferably, in this embodiment, the switching ring is integrally formed with the mode selection member 301 ", that is, a guide groove is provided on the inner peripheral surface of the mode selection member 301". One end of the third switching pin 4534 ″ is movably disposed in the third guide groove 432 ″, and the other end is connected to the connecting member 182 ″ to drive the connecting member 182 ″ to move axially. The body lock 134 "is movable between a first lock position near the first body 1501a" and a second lock position far from the first body 1501a ", but is not fixed in the circumferential direction relative to the casing. It is the same as the second embodiment described above. Similarly, the connecting member 182 ″ in this embodiment is always rotatably connected to the output ring gear 1582 ″, the internal ring gear lock 181 ″ is non-rotatably fixed to the casing, and the connecting member 182 ″ is axially moved to realize the lock with the internal ring gear 181 ″ meshes or separates to achieve the circumferential fixation or rotation of the output ring gear 1582 ″, that is, the connecting member 182 ′ can be in the first switching position near the ring gear lock 181 ″ and away from the ring gear lock 181 "The second switching position is moved between the second switching position, and the connecting piece 182" is always rotationally connected to the output ring gear 1582 "during the axial movement. The internal ring gear lock 181" is not rotatable in the circumferential direction and is fixed relative to the casing. When the piece 182 ″ is in the first switching position, the connecting piece 182 ′ is rotatably connected with the ring gear lock 181 ′ and the rotation of the output ring gear 1582 ″ is restricted by the ring gear lock 181 ″, that is, the output ring gear 1582 ″ is opposite to It is fixed in the circumferential direction of the casing; when the connecting piece 182 In the second switching position, connecting element 182 'and the lock ring 181' axially spaced output ring gear 1582 'can drive link 182' rotate together, while the connecting member 182 'and the nut sleeve 154 "rotary connector.

The main difference between this embodiment and the second embodiment described above is the structure and movement of the body lock 134 "in this embodiment. The switching pin in this embodiment also includes a connection with the body lock 134" for driving the body lock 134 " The fourth switch pin 4516 ″ for radial movement, the guide groove further includes a fourth guide slot (not shown) for one end of the fourth switch pin 4516 ″ to move. One end is connected to the body lock 134 ″ for driving the body lock 134 ″ to perform radial movement, so that the body lock 134 ″ can lock and unlock the first body 1501a ″. Preferably, the fourth switch pin in this embodiment 4516 ″ is integrally formed with the body lock 134 ″. Referring to FIG. 27, when the screwdriver 10 ″ is in the drill mode, the body lock 134 ″ is radially separated from the first body 1501a ″, and the ring gear lock 181 ″ is rotatably connected to the output ring gear 1582 ″ through the connecting member 182 ″, and The connecting piece 182 ″ is separated from the nut sleeve 154 ″. Therefore, in this mode, the rotation of the body 151 ″ can rotate the jaw 152 ″ and the tool head located in the jaw 152 ″ together. See FIG. 29, when the screwdriver 10 “In autochuck mode, the body lock 134 ″ is radially engaged with the first body 1501a ″ to rotate and fix the body 151 ″ relative to the casing, while the ring gear lock 181 ″ passes through the connecting member 182 ″ and the output ring gear 1582 ″ The connection piece 182 ″ is rotatably connected with the nut sleeve 154 ″. Therefore, in this mode, the output ring gear 1582 ″ can drive the connection piece 182 ″ and the nut sleeve 154 ″ together with the jaw 152 ″ in the body 151 ″. Rotating causes the jaws to open or close.

Referring to FIGS. 28 to 29, when the screwdriver 10 ″ is switched from the drill mode to the autochuck mode, the connection member 182 ″ is first disconnected from the ring gear lock 181 ″ during the movement, and the connection member 182 ″ continues Move, the connecting piece 182 "is connected with the nut sleeve 154", and the body lock 134 "is connected with the body 151a" at this time. It should be noted that, in this embodiment, when the clamping jaw 152 ″ is opened or locked, the clutch mechanism 20 ″ disconnects the connection between the output ring gear 1582 ″ and the nut sleeve 154 ″, which is different from the above embodiment. In this embodiment, the clutch moving end teeth 212 "are fixedly connected to the connecting member 182", the clutch static end teeth 212 "are fixed to the nut sleeve 154", and the clutch elastic member 23 "is provided between the connecting member 182" and the casing. . Referring to FIG. 30, in the autochuck mode, after the output ring gear 1582 ″ drives the nut sleeve 154 ″ through the connecting member 182 ″ so that the clamping jaw 152 ″ is clamped or fully opened, the connecting member 182 ″ presses against the clutch elastic member 23 ″, and the clutch The moving end tooth 212 "is separated from the clutch static end tooth 222". Preferably, in order to prevent the movement of the connecting member 182 "from causing the movement of the third switching pin 4534" and the mode selection member 301 "connected to the connecting member 182" during the "trip", the connecting member 182 "is provided with There is an axially extending clutch groove 182a "so that the connector 182" can move relative to the third switching pin 4534 "when" tripped ". It should be noted that from the description of the working principle of the screwdriver 10 ″ in the drill mode switching and the autochuck mode and the switching principle of the drill mode to the autochuck mode in this embodiment, it can be known that the clutch mechanism 20 ″ in this embodiment The first clutch (not shown in the figure) and the second clutch (not shown in the figure) are not always meshed, which is basically the same as the clutch mechanism described in the background art. Only in the autochuck mode, the first clutch and the first clutch The two clutch pieces only mesh (that is, the clutch moving end teeth 212 "and the clutch static end teeth 222" only mesh).

Fourth Embodiment

31-42, 54, 56, 56 and 57 are schematic diagrams of an electric screwdriver 10a according to another embodiment of the present invention. The screwdriver 10a includes a casing, a motor 12a, a battery 18 for power supply, a transmission mechanism, and A chuck assembly includes a chuck housing (front housing) 1104a and an output device 15a located at least partially within the chuck housing 1104a. Specifically, the cabinet includes a rear case 1103a extending horizontally, a handle case 1102a for forming a holding handle fixedly connected to the rear case 1103a, a chuck case 1104a (front case), and a rear case. The body 1103a is abutted to form a main casing extending in the horizontal direction, and the main casing forms a receiving cavity for receiving at least a part of the output device 15a.

The motor 12a is disposed in the casing and outputs rotational power. The output device 15a includes an output shaft 150a, and the output shaft 150a is provided with a receiving hole 1500a for receiving a tool head. The transmission mechanism is located between the motor 12a and the output device 15a to transmit the rotational power of the motor 12a to the output device 15a. The mode selection mechanism is used to switch the screwdriver 10a at least between the drilling mode or the chuck adjustment mode.

Referring to FIGS. 31-36, the output shaft 150a includes a main body 151a, a clamping jaw 152a provided around the receiving hole 1500a to clamp the tool head, and a clamping groove 153a provided on the main body 151a to receive the clamping jaw 152a. The output device 15a further includes an output planetary gear 1581a, an output ring gear 1582a located outside the output planetary gear 1581a, and an adjusting member provided outside the body 151a and capable of rotating relative to the body 151a and the clamping jaw 152a to lock or open the clamping jaw 152a. Basically the same as the above embodiment, the adjusting member includes a nut sleeve 154a, an internal thread (not shown in the figure) is provided on the inner peripheral wall of the nut sleeve 154a, and an external thread 1521a is provided on the side facing the internal thread of the clamping jaw 152a. When the sleeve 154a rotates relative to the clamping jaw 152a, the interaction between the internal thread and the external thread 1521a causes the clamping jaw 152a to open or close. The transmission mechanism is provided with an output sun gear 1583a for driving the output planet gear 1581a to rotate.

The mode selection mechanism includes a connecting member 420a capable of connecting the output ring gear 1582a and the adjusting member axially along the motor shaft under the action of the mode selection member 301a, and a locking element 130a capable of selectively preventing the output ring gear 1582a or the body 151a from rotating. The locking element 130a is non-rotatably disposed with respect to the casing, wherein when in the drilling mode, the locking element 130a is separated from the body 151a and is connected to the output ring gear 1582a to prevent the output ring gear 1582a from rotating in the circumferential direction, and The power between the output ring gear 1582a and the adjusting member is disconnected and transmitted under the action of the connecting member 420a, so that the body 151a and the clamping jaw 152a can be rotated by the motor 12a to drive the tool head to perform work; when the screwdriver 10a is drilled by a drill When the hole mode is switched to the chuck adjustment mode, the locking element 130a is connected to the body 151a and disengaged from the output ring gear 1582a to prevent the body 151a from rotating in the circumferential direction and release the circumferential limitation of the output ring gear 1582a, and the output ring gear 1582a and The adjusting member is connected under the action of the connecting member 420a, so that the output ring gear 1582a can drive the adjusting member to rotate relative to the body 151a and the clamping claw 152a under the action of the motor 12a. Achieve the jaws open or closed 152a. Therefore, as with the first embodiment described above, the locking element 130a in this embodiment includes both a body lock for locking the body 151a and an internal ring gear lock for locking the output ring gear 1582a. In other words, the The main body lock of the locking body 151a and the inner ring gear lock for locking the output ring gear 1582a are inseparably connected or integrally formed. Unlike the first embodiment described above, this embodiment enables the autochuck mode by providing a connecting member 420a. The output ring gear 1582a is connected in the rotation direction of the adjusting member, but in the drill mode, the output ring gear 1582a and the adjusting member are disconnected in the rotating direction, instead of being realized by axially moving the output ring gear 1582a.

In this embodiment, the mode selection mechanism further includes a first push rod assembly 451a connected to the locking element 130a for pushing the locking element 130a to move to realize that the locking element 130a selectively locks the body 151a or the output ring gear 1582a, and a connection The first putter assembly 451a and the fourth putter assembly 454a of the connection member 420a. Therefore, the fourth putter assembly 454a can drive the connection member 420a to move under the action of the first putter assembly 451a. Preferably, in this embodiment, the locking element 130a is moved in the axial direction to switch the locking element 130a between the first locking position and the second locking position, and the connecting member 420a is realized in the first connecting position through axial movement. And the second off position.

The following will further describe how the first putter assembly 451a drives the fourth putter assembly 454a and the connecting member 420a connected to the fourth putter assembly 454a to move with reference to FIGS. 31 and 37-39. The fourth putter assembly 454a includes a fourth link 4541a, the first putter assembly 451a includes a first link 4513a, one end of the first link 4513a is connected to the mode connection member 302a, and the other end is connected to the locking element 130a. When the screwdriver is switched from the drill mode to the autochuck mode, that is, the first link 4513a moves backward under the action of the external force, at this time the first link 4513a drives the locking element 130a to move axially backward. In order to enable the first link 4513a to drive the fourth link 4541a to move axially backward, and the movement stroke of the first link 4513a (that is, the locking element 130a) and the fourth link 4541a (that is, the connecting member 420a) The movement strokes may be different or asynchronous. One of the first link 4513a or the fourth link 4541a is provided with an axially extending link guide groove 4510a, and the other of the first link 4513a or the fourth link 4541a is provided. A link guide 4542a is located in the link guide groove 4510a. In this embodiment, the link guide 4510a is provided on the first link 4513a, and the link guide 4542a is located on the fourth link 4541a. After the first link 4513a drives the locking element 130a to move axially backward a certain distance, the locking element 130a is disconnected from the output ring gear 1582a at this time, and the link guide 4542a and the link guide groove 4512a continue to move backward The abutment, therefore, the first link 4513a not only drives the locking element 130a to move axially backward, but also drives the fourth link 4514a to move axially backward. At this time, the locking element 130a and the body 151a are connected in the rotation direction The body 151a is locked, and at the same time, the connecting member 420a is axially moved backward and connected to the output ring gear 1582a. The screwdriver is switched to the autochuck mode.

When the screwdriver is switched from auto chuck to drill mode, the first link 4513a drives the locking element 130a to move forward in the axial direction under the external force. In order to enable the first link 4513a to drive the fourth link 4541a to move forward in the axial direction, a push rod elastic member 480a is further provided between the first push rod assembly 451a and the fourth link 4541a, wherein the first push rod assembly 451a first drives the locking element 130a to move axially forward, and the forward movement of the first push rod assembly 451a compresses the push rod elastic member 480a, and passes through the push rod elastic member 480a after the push rod elastic member 480a is compressed to a certain degree. The fourth link 4541a is pushed forward. By arranging the putter elastic member 480a between the first putter assembly 451a and the fourth link 4541a, the putter elastic member 480a can push the fourth link 4541a except when the first link 4513a can move forward in the axial direction. The axial direction is forward. The setting of the push rod elastic member 480a can also occur when the screwdriver is switched from drill mode to auto chuck mode. If the connecting member 420a is in the process of axially backward movement and the output ring gear 1582a is engaged during the meshing process, When the "top teeth", the "top teeth" phenomenon was eliminated in time.

Referring to FIGS. 32-33, when in the drill mode, the connecting member 420a is located on the side of the output ring gear 1582a away from the motor 12 and is connected to the adjusting member without relative rotation, and the locking element 130a is located in the second locking position. 130a releases the circumferential lock on the body 151a by axial movement and circumferentially locks the output ring gear 1582a. At the same time, the connecting member 420a disconnects the connection between the output ring gear 1582a and the adjusting member. The output planetary gear 1581a can drive the body 151a. Together with the gripper 152a located in the body 151a.

When the hand-held power tool is switched from the drilling mode to the chuck adjustment mode, the connecting piece 420a and the locking element 130a move along the motor shaft axially toward the motor 12a, so that the connecting piece 420a and the output ring gear are rotated in the rotating direction. 1582a is engaged while the locking element 130a is disengaged from the output ring gear 1582a and the body 151a is fixed relative to the casing.

Referring to FIG. 34 and FIG. 35, when the screwdriver is in the autochuck mode, the locking element 130a is located at the first locking position, the connecting piece 420a is located at the first connecting piece position, and the locking element 130a locks the body 151a circumferentially in a non-rotatable manner. At the same time, the connecting member 420a connects the output ring gear 1582a with the adjusting member.

The screwdriver 10a further includes a clutch mechanism 20a located between the adjusting member and the output ring gear 1582a for disconnecting the torque transmission between the output ring gear 1582a and the adjusting member after the jaw 152a is opened or closed in the autochuck mode. The clutch mechanism 20a includes a first clutch member 21a that can be rotatably connected to the output ring gear 1582a, a second clutch member 22a that is rotatably connected to the adjustment member and can move axially relative to the adjustment member, and a clutch elastic member 23a. This embodiment In the middle, the clutch elastic member 23a is located between the second clutch member 22a and the chuck housing 1104a (front housing). After the clamping claw 152a is clamped or fully opened, the second clutch member 22a compresses the clutch elastic member 23a. The clutch member 22a moves axially forward, the first clutch member 21a is disengaged from the second clutch member 22a, and the output ring gear 1582a no longer transmits torque to the adjusting member (nut sleeve 154a). Preferably, the first clutch member 21a is a snap ring sleeved on the outer periphery of the body 151a, the snap ring is provided with an axially extending clutch tooth groove 211a, and the connecting member 420a is provided with a connecting tooth 421a that cooperates with the tooth groove 211a. In this embodiment, the connecting member 420a and the first clutch 21a are always engaged, that is, the connecting tooth 421a is always located in the clutch tooth groove 211a, and the connecting tooth 421a moves axially backward in the clutch tooth groove 211a, that is, The axial direction moves toward the output ring gear 1582a, so as to realize the connection between the first clutch 21a and the output ring gear 1582a. Of course, it can be understood that in other embodiments, the clutch structure 20a can also be provided in other ways, such as the clutch elastic member 23a is located between the first clutch member 21a and the housing 11a. After the clamping claw 152a is clamped or fully opened, The first clutch member 22a compresses the clutch elastic member 23a, the first clutch member moves axially, the first clutch member 21a is disengaged from the second clutch member 22a, and the output ring gear 1582a no longer transmits torque to the nut sleeve 154a.

The mode selection mechanism further includes a mode selection member 301a capable of moving between the first position and the second position with respect to the casing. When the mode selection member 301a is in the first position, the handheld power tool 10a is in a drilling mode; When the member 301a is in the second position, the handheld power tool 10a is in the chuck adjustment mode; when the mode selector 301a is moved from the first position to the second position, the mode selector 301a is away from the first end (the output shaft 150a is in the axial direction It has an end provided with a receiving hole 1500a). In this embodiment, the movement of the mode selection member 301a between the first position and the second position is an axial movement along the motor shaft, that is, the mode selection member 301a is in the first position and the second position along the front-rear direction of the main housing 1101. Between positions.

The mode selector 301a is connected to the first putter assembly 451a to transmit the movement of the mode selector 301a to the first putter assembly 451a. In this embodiment, when the operator holds the handle portion, the operator can hold the handle by The part of the hand simultaneously operates the mode selector 301a. Specifically, in order to facilitate the operator to switch modes when holding the handle housing 1102a with one hand, a mode selector 301a is provided adjacent to the handle housing 1102a so that the operator can hold the handle and control mode simultaneously with one hand. The selector 301a moves linearly. Preferably, in this embodiment, when the screwdriver is switched to the autochuck mode, the mode selection member 301a moves in the first direction under the pressure of the finger. Preferably, the output shaft 150a has a receiving hole 1500a provided in the axial direction. The first end and the second end opposite to the first end, and the first direction is the direction from the first end to the second end, that is, the mode selector 301a has a first position and is moved from the initial position to the position in the first direction. Therefore, when the mode selector 301a moves to the second position in the first direction, the screwdriver is in the autochuck mode. In addition, the mode selection mechanism in this embodiment further includes a mode resetting element 303a that elastically abuts the mode selecting element 301a, and the mode resetting element 303a is located between the mode selecting element 301a and the casing. The mode selector 301a is operable to overcome the force of the first elastic element 303a from the first position to the second position, and can return to the first position from the second position by the elastic force of the first elastic element 303a. .

After the mode selector 301a moves to the second position in the first direction, the mode reset element 303a is in an elastic energy storage state under the action of the external force through the mode selector 301a, that is, when the mode reset element 303a is a tension spring, the mode is reset. The element 303a is stretched by the external force. When the mode resetting element 303a is a compression spring, the mode resetting element 303a is compressed by the external force. When the external force is released, the mode selecting member 301a is moved to the initial position by the mode resetting element 303a. It should be noted that when the screwdriver 10a is switched from the drill mode to the autochuck mode, the locking element 130a and the connecting member 420a in this embodiment both move in the first direction, which is consistent with the moving direction of the mode selector 301a ( That is, the moving direction of the connecting member 420a and the locking member 130a is the same as the moving direction of the mode selection member 301a. This setting mode enables the mode selection member 301a to pass a simple linkage mechanism (such as the first pusher assembly 451a and the fourth The push rod assembly 454a) can drive the locking element 130a and the connecting member 420a to move. Compared with the moving direction of the locking member 130a or the connecting member 420a and the mode selection member 301a, the linkage mechanism does not need to switch the moving direction. The linkage mechanism has a simple structure.

In this embodiment, the screwdriver further includes a switch trigger 304a for controlling power to or from the motor 12 and a first control component for controlling the movement of the motor 12 according to the movement of the switch trigger 304a. The movement stroke of the switch trigger 304a includes a starting position where the motor 12 is in a power-off state, movement between an end position where the motor 12 is in an activated state, and a predetermined position which controls the motor 12 to output at a predetermined speed between the starting position and the end position.

In order to facilitate the control of the speed of the motor 12 when the switch trigger 304a is operated, as the stroke of the movement of the switch trigger 304a is different, the first control component makes the rotation speed of the motor 12 different. That is, the rotation speed of the motor 12 is set in proportion to the stroke of the trigger switch 304a from the starting position, and the larger the stroke of the trigger switch 304a from the starting position, the higher the rotation speed of the motor. The movement mode of the mode selector 301a in this embodiment is basically the same. In order to facilitate the operator to conveniently control the switch trigger 304a when holding the handle with one hand, the switch trigger 304a is provided adjacent to the handle housing so that the operator can The hand simultaneously holds the handle and controls the switch trigger 304a for movement. The movement of the switch trigger 304a is preferably a linear movement. The switch trigger 304a has an initial position for the switch disconnecting the motor from the power supply and an end position for connecting the motor to the power supply. The greater the stroke of the switch trigger 304a moving in the first direction, that is, the farther the operation position is from the output position, the higher the rotation speed of the motor.

Further, the mode selector 301a is disposed adjacent to the switch trigger 304a, so that the operator can simultaneously hold the handle with one hand and selectively control the linear movement of one of the mode selector 301a and the switch trigger 304a.

It can be known from the description of the first embodiment that when the screwdriver is in the autochuck mode, if the speed of the motor is high, the “tripping” sound is likely to be harsh and the operating environment is poor. In order to avoid this problem, it is necessary to limit the stroke of the movement of the switch trigger 304a, so as to avoid that a large stroke of the movement of the switch trigger 304 causes a high motor rotation speed. Referring to FIGS. 32-35, in this embodiment, the screwdriver further includes an interlocking unit 305a, which is pivotally disposed in the casing and can be pivoted according to a preset by the mode selector 301a. Direction for pivoting motion.

The interlocking unit 305a includes a first limit arm 3051a and a second limit arm 3052a. Referring to FIG. 35, when the mode selector 301a is switched to the second position according to the arrow F1 in the figure, the mode selector 301a forces the first A limit arm 3051 drives the interlock unit 305a to pivot, and the free end of the second limit arm 3052a moves to a predetermined position between the initial position and the end position of the switch trigger 304a. When the switch trigger moves from the initial position to the end position The interlocking unit 305 a can abut the switch trigger 304 at a predetermined position to limit the stroke of the switch trigger 304 a from moving beyond the predetermined position, thereby controlling the rotation speed of the motor 12. In order to prevent the operator from mistakenly operating the mode selector 301a in the drill mode and the motor speed is high, when the switch trigger 304a moves to any position between the predetermined position and the end position, if the mode selector 301a is operated, the mode When the selector 301a drives the interlocking unit 305 to pivot through the first limit arm 3051a, the second limit arm 3052a abuts the switch trigger, thereby preventing the mode selector 301a from moving to the second position, and the mode selector 301a cannot move to Second position. In this embodiment, a mode connection member 302a is further provided between the interlocking unit 305a and the first link 4513a. Preferably, the mode connection member 302a is an elastic steel wire.

Referring to FIGS. 31-35, in this embodiment, the mode selection member 301a is provided with a mode switching groove 3011a that guides the free end movement of the first limit arm 3051a. When the mode selection member 301a moves in the first direction, The free end of the first limit arm 3051a moves according to the preset path under the action of the mode switching slot 3011a, the interlocking unit 305a pivots in a preset direction, and the second limit arm 3052a pivots to the end position and Between the initial positions, the switch trigger 304a cannot move from the initial position to the end position; see FIG. 35a, when the switch trigger 304a is switched from the initial position to the end position in the drill mode, the free end of the second limit arm 3052a is The set rotation direction can abut the switch trigger 304a, that is, the free end of the second limit arm 3052a cannot be pivoted beyond the end position to the end position and the initial position. Therefore, the interlocking unit 305a cannot follow the preset The direction is pivoted to the first limit position, so the mode selector at this time cannot be operated.

In other embodiments of the present invention, the arrangement of the interlocking unit 305a may also adopt other forms of structures, as shown in FIGS. 40-42. The interlocking unit 305a ′ is pivotally disposed on the casing, and can be selected in the mode. The piece 301a 'is driven to perform a pivoting motion according to a preset pivoting direction. The interlocking unit 305a ′ includes a first limit arm 3051a ′ and a second limit arm 3052a ′. When the mode selector 301a ′ is switched from FIG. 40 to FIG. 41, that is, when it is switched to the second position, The mode selector 301a ′ forces the first limit arm 3051a ′ to bring the interlocking unit 305a ′ to pivot to the first limit position, and the free end of the second limit arm 3052a ′ moves to the position between the switch initial position and the switch end position. A predetermined position to limit the stroke of the switch trigger 304a 'movement. Referring to FIG. 42, when the switch trigger 304 a ′ moves to the end position, the second limit arm 3052 a ′ abuts against the travel switch in a preset pivot direction, and the mode selector 301 a ′ cannot move to the second position. The mode selection member 301a 'is provided with a first abutment portion 3011a' which is in contact with the first limit arm 3051a '. See FIGS. 40-41. When the mode selection member 301a' moves in the first direction, the first contact The connecting portion 3011a ′ abuts the first limit arm 3051a ′, and the first limit arm 3051a ′ drives the interlocking unit 305a ′ to pivot in a preset direction. The switch trigger 304a ′ is provided with a second abutting portion 3041a ′ capable of abutting against the second limit arm 3052a ′. When the switch trigger 304a ′ moves in the first direction, the second abutting portion 3041a ′ and the second limit The position arm 3052a ′ abuts, and the second limit arm 3052a ′ drives the interlocking unit 305a ′ to pivot, so that the free end of the first limit arm 3051a ′ moves between the initial position and the second position. When the mode selection member 301a 'moves in the first direction, the first abutment portion 3011a' abuts against the first limit arm 3051a ', and the mode selection member 301a' cannot move to the second position, that is, the mode selection member 301a ' Unable to switch the screwdriver to autochuck mode. In addition, in this embodiment, the mode connecting member 302a 'is directly connected to the mode selecting member 301a', that is, the mode connecting member 302a 'is not connected to the mode selecting member 301a' through the limit mechanism 305a '.

The transmission mechanism is the same as the first implementation. In this embodiment, the transmission mechanism is a planetary gear reduction mechanism 13a. The planetary gear reduction mechanism 13a is preferably a two-stage planetary gear reduction mechanism, including a first-stage planet close to the motor. The gear train 131a and the second-stage planetary gear train 132a near the output device 15a. The first stage planetary gear train 131a includes a first sun gear 1310a fixed to a motor shaft 121a, a first planet gear 1311a meshing with the first sun gear 1310a and disposed on the outer periphery of the first sun gear 1310a, and a first planet gear 1311a The meshed first ring gear 1312a and the first planet carrier 1313a for supporting the first planet gear 1311a. The second stage planetary gear train 132a includes a second sun gear 1320a fixedly disposed on the first planet carrier 1313a, and A second planetary gear 1321a meshed with the two sun gears 1320a, a second ring gear 1322a meshed with the second planetary gear 1321a, and a second planet carrier 1323a for supporting the second planetary gear 1321a. The second ring gear 1322a (that is, equivalent to the shifting ring gear in this embodiment) is movable relative to the casing between the first shifting position near the motor and the second shifting position away from the motor along the motor shaft 121a. When the second ring gear 1322a is in the first shifting position, the second ring gear 1322a is rotatably disposed in the casing, and the second ring gear 1322a meshes with the first planet carrier 1313a and the second planet gear 1321a at the same time. Therefore, the first planet carrier 1313a, the second planet gear 1321a, and the second ring gear 1322a rotate together, and the second planetary gear train 132a has no deceleration output, that is, the second planet carrier 1323a and the first planet carrier 1313a have the same rotation speed. The second planet carrier 1323a outputs high speed. When the second ring gear 1322a is in the second shifting position, the second ring gear 1322a is fixed to the rear case 110a in a non-rotatable manner in the circumferential direction, and the second ring gear 1322a is in contact with the first planet during the axial movement. The carrier 1313a is disengaged but the second ring gear 1322a is still engaged with the second planet gear 1321a, so that the second planet carrier 1323a outputs a predetermined reduction gear ratio relative to the first planet carrier 1313a, and the second planet carrier 1323a outputs Low speed. At the same time, when the mode selector 301a is moved from the first position to the second position, the second ring gear 1322a (ie, the speed change ring gear) can be moved to the first speed change position. In this embodiment, the mode selector 301a is provided with a switch trigger (not shown). When the mode selector 301a moves to the second position, the switch trigger is triggered, the power supply circuit of the motor is turned on, and the motor 12 is driven. The adjusting member is rotated relative to the body 151a to realize the opening or closing of the clamping jaw. It should be noted that, in the above-mentioned first embodiment, in order to ensure that the rotation speed of the output shaft 150 is low in the autochuck mode, a “T” slot structure is provided so that the second planetary carrier outputs low speed in the autochuck mode. In this embodiment, in order to ensure that the rotation speed of the output shaft 150 is low in the autochuck mode, the screwdriver 10a further includes a position sensor 24a and a second control component. The position sensor 24a is used to detect the position of the second ring gear 1322a, and The position signal of the second ring gear 1322a is transmitted to the second control component, and the second control component controls the rotation speed of the motor according to the position of the second ring gear 1322a so that the output shaft 15a can always be output in the autochuck low speed mode when in the autochuck mode. That is, output is performed at a speed lower than a preset speed. It should be noted that the autochuk low speed mode in this embodiment is not a specific value, as long as the speed of the output shaft 15a is lower than a preset speed value.

In this embodiment, the above-mentioned mode selection member 301a drives the locking element 130a and the connecting member 420a to move through the first pusher assembly 451a and the fourth pusher assembly 454a, respectively. When the mode is switched, the

locking elements

130a and 130a and The movement strokes of the connecting member 420a are inconsistent. It can be understood that in other embodiments, the movement strokes of the locking member 130a and the connecting member 420a can be set to be the same, that is, the locking member 130a and the connecting member 420a can be connected by the same connection. The rods move synchronously.

Referring to FIGS. 31 to 34, 56 and 57, in an embodiment, the handheld power tool further includes a control module 66, which is electrically connected to the motor 12a. The control module 66 is used for the handheld power tool. The tool is in response to the movement of the mode selection member 301a in the chuck adjustment mode, and controls the motor 12a to rotate in a predetermined direction to achieve the opening or closing of the clamping claw 152a. That is, after the hand-held power tool is in the chuck adjustment mode, the control module 66 can respond to the mode selector 301a and control the motor 12a to rotate in a predetermined direction to realize the opening or closing of the clamping claw 152a. After the operator operates the mode selector 301a, the handheld power tool is placed in the autochuck mode. At this time, the control module 66 can control the motor 12a to rotate in the first rotation direction or the second rotation direction opposite to the first rotation direction. Release and tighten the tool head. That is, in the autochuck mode, the operator can control the forward rotation or reverse rotation of the motor 12a only through the operation mode selector 301a. In this way, when the motor 12a rotates, the nut sleeve 154a can be driven to rotate by the output planetary gear train. The nut sleeve 154a rotates relative to the clamping jaw 152a, so that the clamping jaw 152a is opened or closed to release or lock the tool head.

In an embodiment, when the hand-held power tool is switched to the chuck adjustment mode, the control module 66 can respond to the movement of the mode selector 301a and control the motor 12a to rotate in the first rotation direction, and when the hand-held power tool is switched to the chuck again In the head adjustment mode, the control module 66 can respond to the movement of the mode selection member 301a and control the motor 12a to rotate in a second rotation direction opposite to the first rotation direction, so that the alternate operation of the mode selection member 301a can realize the alternate opening of the grippers 152a. With closed.

Specifically, when the operator operates the mode selector 301a, the mode selector 301a is first moved from the first position to the second position, so that the hand-held power tool is switched to the chuck adjustment mode. During the movement of the mode selector 301a from the first position to the second position, when the locking element 130a is located at the first locking position, the output ring gear 1582 is located at the second working position. At this time, the locking element 130a moves the body 151a and the clamp The claws 152a are locked in the circumferential direction so that the body 151a and the clamping claws 152a cannot rotate. After the mode selection member 301a moves to the second position, the handheld power tool is in the chuck adjustment mode, and the control module 66 can respond to the movement of the mode selection member 301a. At this time, the control module 66 controls the motor 12a to rotate in a preset rotation direction. Specifically, the motor 12a can indirectly drive the output ring gear 1582 to rotate, and then the output ring gear 1582 drives the nut sleeve 154a to rotate relative to the clamping claw 152a to achieve locking or release of the tool head.

That is, the mode selector 301a has two control strokes, the first control stroke is a mechanical control stroke, and the second control stroke is an electronically controlled control stroke. After operating the mode selector 301a, the mode selector 301a first controls the locking element 130a to lock the body 151a, so that the handheld power tool is in the chuck adjustment mode. Then, the operation of the mode selector 301a can be responded by the control module 66, and then the control module 66 controls the motor 12a to rotate in the first rotation direction or the second rotation direction. It can be understood that the first rotation direction and the second rotation direction herein refer to the forward rotation and the reverse rotation of the motor 12a. Exemplarily, when the first rotation direction is the forward rotation direction of the motor 12a, the second rotation direction is the reverse rotation direction of the motor 12a. Of course, when the first rotation direction can also be illustrated as the forward and reverse direction of the motor 12a, the second rotation direction is illustrated as the reverse direction of the motor 12a.

In this way, the operating mode selector 301a puts the hand-held power tool in the chuck adjustment mode. The control module 66 can control the motor 12a to rotate in the first rotation direction, that is, the motor 12a rotates forward. At this time, the motor 12a can be driven by the output ring gear 1582. The nut sleeve 154a rotates relative to the clamping jaw 152a, so that the clamping jaw 152a is closed to lock the tool head. At this time, the operation of the mode selection member 301a is released, and the mode selection member 301a is reset to the first position under the action of the mode reset element, that is, the power tool is in the drilling mode, and the operator can use the hand-held power tool to perform corresponding operations. Operations such as drilling. After use, the tool head needs to be replaced or removed or the installation position of the tool head is unreasonable and needs to be adjusted. Operate the mode selector 301a to the chuck adjustment mode again. The control module 66 responds to the movement of the mode selector 301a. The control module 66 can control the motor. 12a rotates in a direction opposite to the rotation direction of the motor 12a in the last autochuck mode, that is, in the second rotation direction, that is, the motor 12a is reversed. At this time, the motor 12a can drive the nut sleeve 154a through the output ring gear 1582. As the jaw 152a is rotated, the jaw 152a is opened to release the tool head. After the operation of the tool head, such as disassembly, replacement, and position adjustment, is completed, the tool head is locked in the above manner. The reciprocating operation in this way realizes the locking and releasing of the tool head. In this way, the locking and releasing process of the tool head is simple, and the operator can complete the replacement of the operating accessories with one hand, which is convenient for the operator.

It is worth noting that the control module 66 has a memory function and can store the previous rotation direction of the motor 12a. In this case, the control module 66 controls the motor 12a to rotate in a direction opposite to the previous rotation direction. That is, when the control module 66 controls the motor 12a to rotate in the first rotation direction, the control module 66 controls the motor 12a to rotate in the second rotation direction. In this way, when the operator controls the release and locking of the tool head through the operation mode selection member 301a, there is no need to operate other keys, and the mode can be switched and the tool head can be locked or released only by operating one button, which is convenient to use. In addition, when the hand-held power tool is powered off, the control module 66 can automatically store the rotation direction before the motor 12a is powered off. When the hand-held power tool is powered on again, the control module 66 can control the motor according to the rotation direction before the power-down 12a turns.

With the handheld power tool of the above embodiment, when the operator holds the handle portion, the operator can simultaneously operate the mode selection member 301a with the hand holding the handle portion, and after the operation mode selection member 301a, the control module 66 can The control motor 12a is rotated in a first rotation direction or a second rotation direction opposite to the first rotation direction to release and lock the tool head. In this way, when the operator is working, one-handed operation and control of the hand-held power tool can be realized, and the corresponding mode switching function and the collapsing or opening of the chuck mechanism can be realized, which facilitates the release and locking of the tool head and has high flexibility .

Optionally, the hand-held power tool further includes a reversing switch provided on the handle portion, and the reversing switch is electrically connected to the control module 66. The reversing switch is used to control the forward rotation or reverse rotation of the motor 12a. When the operator operates the reversing switch, after the motor is started, the control module 66 can control the motor 12a to rotate in a preset rotation direction according to internal control information. Exemplarily, the reversing switch can move between a first position and a second position relative to the casing. When an operator operates the reversing switch to bring it to the first position, the control module 66 controls the motor 12a in the first rotation direction When the operator operates the reversing switch in the second position, the control module 66 controls the motor 12a to rotate in the second direction, that is, reverse.

Understandably, when the hand-held power tool is in the drill mode, the operator operates the reversing switch to place it in the first position or the second position, and controls the motor 12a to rotate forward or reverse by the reversing switch. When the operator operates the trigger switch After starting the motor, the motor 12a rotates forward or reverse according to the position of the reversing switch, so that the main body 151a, the clamping jaw 152a, the adjusting member and the tool head are rotated together to perform work by the driving shaft.

Understandably, in other embodiments, the operation of the mode selection member 301a can be realized from the drilling mode to the chuck adjustment mode and the motor is started, but the motor cannot be reversed by the operation mode selection member 301a. At this time, the Reversing switch for reversing. In this way, when the operator operates the mode selector 301a to the chuck adjustment mode, if the reversing switch is in the first position at this time, the control module 66 starts the motor to rotate forward in response to the operation of the mode selector; when the operator operates the mode selector 301a to chuck adjustment mode, if the reversing switch is in the second position at this time, the control module 66 starts the motor to reverse rotation in response to the operation of the mode selector; of course, in other embodiments of the present invention, the reversing switch can also It is set as two separate switches, one of which controls the motor to rotate forward and the other to control the motor to reverse rotation.

Understandably, when the hand-held power tool is in the auto chuck mode, the operator can also control the closing and opening of the gripper through the reversing switch and the trigger switch. In other words, the mode selector 301a can switch the power tool from the drilling mode to the chuck adjustment mode, but the reversing of the motor needs to be controlled by the reversing switch, and the starting of the motor needs to be realized by the trigger switch. Specifically, after operating the mode selection member 301a and the body 151a is locked, the output ring gear 1582a is connected to the nut sleeve 154a in the rotation direction through the connecting member 420a, and then the forward and reverse control switch is switched to the first position or the second position At this time, when the trigger switch is operated again, the motor 12a is started, the output ring gear 1582 drives the nut sleeve 154a to rotate relative to the clamping jaw 152a, so that the clamping jaw 152a is opened or closed to release or lock the tool head.

Referring to FIGS. 36 and 54, in an embodiment, when an operator holds the handle portion, the operator can simultaneously operate the mode selection member 301 a with a hand holding the handle portion. In this way, when the operator uses the hand-held power tool to work, he can realize one-handed operation and control of the hand-held power tool, and realize the corresponding mode switching function and the collapsing or opening of the chuck mechanism, which facilitates the release and locking of the tool head. Tight and flexible.

Referring to FIGS. 31 to 34, 56 and 57, in one embodiment, after the mode selector 301a is operated, the control module 66 can respond to the operation of the mode selector 301a and control the motor to rotate in a predetermined direction. When operated again When the mode selector is in the chuck adjustment mode, the control module 66 can respond to the operation of the mode selector 301a and control the motor to rotate in the direction opposite to that in the previous chuck adjustment mode, for example, in the last chuck adjustment mode The motor 12a rotates forward, and the mode selector 301a is operated again. The motor 12a reverses. If the last operation mode selector 301a is in the chuck adjustment mode, the control module 66 responds to the operation of the mode selector 301a and controls the motor 12a to reverse. , The mode selection member 301a is operated again, and the motor 12a rotates forward. Specifically, the power tool further includes a trigger mechanism. When the mode selection member 301a is operated and the handheld power tool is in the chuck adjustment mode, the trigger mechanism can generate a trigger. The signal is transmitted to the control module 66. After receiving the trigger signal, the control module 66 controls the previous chuck according to the motor 12a. The rotational direction of the motor rotation control mode section, i.e. the control module then receives the trigger signal and the last control motor in the direction opposite the collet adjustment mode to rotate.

Exemplarily, after the mode selection member 301a is moved from the first position to the second position, the handheld power tool is in the chuck adjustment mode. At this time, the operation of the mode selection member 301a enables the trigger mechanism to be triggered, and the trigger mechanism sends the trigger. A signal is sent to the control module 66, that is, the trigger mechanism is communicated with the control module, and the control module 66 can control the motor 12a to rotate. When the mode selector 301a returns from the second position to the first position, the mode selector 301a is disengaged from the trigger mechanism. At this time, the control module no longer sends a trigger signal to the control module, the trigger mechanism and the control module 66 form an open circuit, and the control module 66 The motor 12a cannot be controlled to rotate.

In one embodiment, the trigger mechanism includes a switch trigger 306a and a bypass switch 308a that can move under the action of the mode selection member 301a. When the mode selection member 301a moves and the handheld power tool is in the chuck adjustment mode, the mode selection The component 301a can trigger the bypass switch 308a to be closed by the switch trigger 306a, so that the bypass switch 308a and the control module 66 are turned on, and the control module 66 controls the motor 12a to rotate in a predetermined direction. The bypass switch 308 a is electrically connected to the control module 66. After the mode selector 301a moves to the second position, the mode selector 301a can touch the bypass switch 308a through the switch trigger 306a. At this time, the bypass switch 308a is turned on with the controller, and the controller can control the motor 12a to rotate.

Referring to FIG. 46, FIG. 46 shows a working principle diagram of the chuck adjustment mode. When the mode selection member is moved to the second position, that is, the chuck adjustment mode, the control module determines whether to control the motor according to whether a trigger signal is received. Rotate in the first direction. If a trigger signal is received, the motor is controlled to rotate in the first rotation direction. If not, the motor is not controlled to rotate. When the mode selector is triggered again, the control module continues to determine whether the trigger signal is received. No, the motor still does not rotate, if it does, the motor rotates in the second direction.

It can be understood that the switch triggering element 306a may be disposed on the mode selecting element 301a, or may be disposed near the bypass switch 308a. Exemplarily, the switch trigger 306a may be disposed near the bypass switch 308a. After the mode selector 301a moves to the second position, the mode selector 301a can touch the switch trigger 306a, so that the switch trigger 306a touches the bypass switch 308a. At this time, the bypass switch 308a and the control module 66 are turned on. Of course, when the switch trigger 306a is set on the mode selector 301a, that is, the mode selector can drive the switch trigger 306a to move synchronously, while the mode selector 301a moves to the second position, the switch trigger 306a can trigger the bypass The switch 308a makes the bypass switch 308a and the control module 66 conductive.

In one embodiment, the trigger mechanism includes a signal detection module, and the signal detection module is electrically connected to the control module 66. When the mode selector 301a moves and the handheld power tool is in the chuck adjustment mode, the signal detection module can generate a trigger signal. The trigger signal is transmitted to the control module 66, and the control module 66 controls the motor 12a to rotate in a predetermined rotation direction according to the trigger signal. That is, the signal detection module is used to identify whether the mode selection element 301a moves to the second position. After the mode selection element 301a moves to the second position, the signal detection module can generate a trigger signal. The trigger signal here is equivalent to the work of the above embodiment. signal. After the signal detection module transmits the trigger signal to the control module 66, the control module 66 operates, and the control module 66 then controls the motor 12a to rotate in the opposite rotation direction from the previous chuck mode according to the previous rotation direction of the motor.

In one embodiment, the hand-held power tool further includes a power supply, and the signal detection module or trigger mechanism includes a trigger switch 308a. The trigger switch includes a first trigger member electrically connected to the power source and a first trigger member electrically connected to the control module 66. Two trigger elements. When the mode selection element 301a moves to the second position in the first direction, the first trigger element or the second trigger element moves under the action of the mode selection element 301a and causes the first trigger element and the second trigger element to electrically Because of this, the trigger switch 308a generates a high-level signal and transmits it to the control module 66, so that the control module 66 controls the motor 12a to rotate in a predetermined rotation direction. Understandably, the power supply here is the battery pack.

The first trigger element and the second trigger element are in an open state in a normal state. After the operator operates the mode selection member 301a, the first trigger and / or the second trigger will generate corresponding actions, so that the first trigger and the second trigger are electrically connected. At this time, the signal detection module will generate a high Level signal. The high-level signal is the trigger signal of the above embodiment. After receiving the high-level signal, the control module 66 controls the motor 12a to rotate in the direction opposite to the previous rotation according to the rotation direction of the motor 12a in the last chuck adjustment mode (ie, the autochuck mode).

Of course, in other embodiments, the signal detection module or trigger mechanism may also be a sensor. Preferably, the signal detection module or trigger mechanism includes a magnet provided on the mode selector 301a and a Hall sensor provided on the housing. When the mode selector 301a drives the magnet to move to the second position, the Hall sensor can generate a detection signal (trigger signal) and transmit the detection signal to the control module. After receiving the trigger signal, the control module receives the trigger signal according to the motor in the previous chuck adjustment mode. The direction of rotation is to control the motor to rotate in the direction opposite to the last time.

In an embodiment, the control module 66 includes a signal processing unit and a controller for controlling the rotation of the motor 12a. The signal processing unit is configured to receive a trigger signal from the signal detection module and to rotate the motor 12a in the previous chuck adjustment mode according to the rotation The direction processes the signal and outputs it to the controller. The controller controls the motor 12a to rotate in a direction opposite to that in the previous chuck adjustment mode. Of course, in other embodiments of the present invention, the signal processing unit may be further connected to the bypass switch 308a. After being triggered, the bypass switch 308a can enable the signal processing unit to rotate according to the motor 12a in the previous chuck adjustment mode. The direction processing signal is output to the controller, so that the controller controls the motor 12a to rotate in a direction opposite to that in the previous chuck adjustment mode.

Exemplarily, the control module 66 of the present invention includes the above-mentioned signal processing unit and a controller. For example, the controller includes 6 MOS, and the motor 12a is controlled to forward or reverse by the conduction sequence of the 6 MOS. It can be understood that the signal processing unit and the controller may be independent units. Of course, the signal processing unit and the controller may also be integrated and set, that is, the controller also has a signal processing function.

Optionally, the controller includes, but is not limited to, an MCU, a PLC, or a CPU, and may also be other structures capable of controlling functions, such as a control circuit and the like. Exemplarily, the controller is an MCU. The signal processing unit is used to output a control signal for controlling the rotation of the motor 12a.

Specifically, after the operator operates the mode selector 301a, the bypass switch 308a is turned on. The bypass switch 308a can transmit the high-voltage signal of the battery pack to the control module 66. At the same time, the control module (signal processing unit and control Device). The signal processing unit outputs a control signal for controlling the rotation of the motor 12a, and transmits the control signal to the controller. After receiving the control signal, the controller controls the motor 12a to rotate according to the preset rotation direction of the control signal. When the mode selector 301a is reset, the signal processing unit and the controller are powered off, and the motor 12a stops rotating. When the operator operates the switch board to make the battery pack and the control module 66 conductive, the signal processing unit and the controller are powered on. In an embodiment, the signal processing unit includes an information storage sub-unit for storing rotation information (such as a rotation direction) of the control motor 12a in the last chuck mode, and a signal output sub-unit for outputting a control signal to the controller. The information storage subunit is used to store the control signal of the motor 12a rotating in the first rotation direction. At the same time, the signal processing unit can correct the control signal after receiving the trigger signal caused by the mode adjustment member to the trigger module, and the signal can be corrected by the signal. The output subunit outputs a control signal to the controller, so that the controller controls the motor 12a to rotate in a direction opposite to the last chuck adjustment mode according to the control signal.

The information storage sub-unit has a memory function to store and memorize the control signals output by the information output sub-unit. The control signal in the information storage sub-unit is transmitted to the controller through the signal output sub-unit. After receiving the control signal, the controller controls the motor 12a to rotate around the first rotation direction according to the control signal. In addition, when the controller receives the control signal, the controller feeds back the control signal to the counting unit, so that the counting unit corrects the control signal therein, so that the control signal that previously controlled the motor 12a to rotate in the first rotation direction becomes control A control signal for the motor 12a to rotate in the second rotation direction. In this way, when the mode selector 301a is operated next time, the counting unit outputs a corrected control signal, and transmits the signal to the controller through the output signal unit. The controller controls the motor 12a to rotate in the second rotation direction according to the control signal. The controller feeds back the control signal to the counting unit, and the counting unit corrects the control signal so that the control signal that previously controlled the motor 12a to rotate in the second rotation direction becomes a control signal that controls the motor 12a to rotate in the first rotation direction. By reciprocating the control signal in this way, the rotation direction of the motor 12a is controlled.

It should be noted that the control signal output by the counting unit is controlled by the working signal sent from the bypass switch 308a. Specifically, after the bypass switch 308a is triggered, an operating signal may be issued. At this time, the bypass switch 308a can transmit the working signal to the signal processing unit, and the signal processing unit sends out the control signal stored therein after receiving the working signal, so that the controller controls the motor 12a to rotate according to the control signal.

Exemplarily, a control signal for controlling the rotation of the motor 12a in the first rotation direction is stored in the counting unit. After the operation mode selector 301a moves to the second position, the bypass switch 308a sends an operating signal to the signal processing unit, so that the first control signal in the counting unit is transmitted to the controller through the output signal unit, and the controller is connected to the first control The signal control motor 12a rotates around the first rotation direction. In addition, when the controller receives the first control signal, the controller feeds back the first control signal to the counting unit, so that the counting unit corrects the first control signal to become the second control signal. When the operation mode selector 301a moves to the second position again, the bypass switch 308a sends a working signal to the signal processing unit, so that the counting unit outputs a second control signal, which is transmitted to the controller through the output signal unit. The control signal controls the motor 12a to rotate in the second rotation direction. At the same time, the controller feeds back the second control signal to the counting unit, and the counting unit corrects the second control signal to become the first control signal.

Further, the information storage and modification manner of the information storage sub-unit is as follows. The counting manner of the units in the information storage unit is i = 0 or i = 1. Exemplarily, when i = 0, the counting unit outputs a first control signal, and when i = 1, the counting unit outputs a second control signal. Of course, when i = 0, the counting unit outputs the second control signal, and when i = 1, the counting unit outputs the first control signal.

The number counted in the information storage subunit is i = 0. When the operation mode selector 301a is moved to the second position, the bypass switch 308a sends a working signal to the signal processing unit. The signal processing unit reads i = 0 in the signal storage subunit to generate a first control signal. The control signal is transmitted to the controller through the output signal unit, and the controller controls the motor 12a to rotate about the first rotation direction according to the first control signal. In addition, when the controller receives the first control signal, the controller feeds back the first control signal to the counting unit, so that the number counted in the information storage subunit changes from i = 0 to i = 1. When the operation mode selector 301a moves to the second position again, the bypass switch 308a sends a working signal to the signal processing unit. The signal processing unit reads i = 1 to generate a second control signal. The second control signal passes the output signal unit. Transmitted to the controller, the controller controls the motor 12a to rotate in the second rotation direction according to the second control signal, and at the same time, the controller feeds back the second control signal to the information storage subunit, and the number of information storage subunits is changed from i = 1 to i = 0.

Of course, in other embodiments of the present invention, the information storage sub-unit may count the operation times of the mode selector 301a (that is, the number of times the mode selector triggers the trigger mechanism), such as odd and even times. For an odd number of times, a second control signal is output for an even number of times.

In this application, the information storage sub-unit is used to store and memorize the information about the previous rotation direction of the motor, so that in the next chuck adjustment mode, the rotation direction of the motor is opposite to the previous rotation direction. It should be noted that the storage of information And memory function may be long-term or short-term. For example, when the information is stored and memorized for a long time, the rotation direction of the motor in the next chuck adjustment mode is opposite to the previous rotation direction at any time. Of course, in other embodiments, the information storage subunit has a time limit for the storage and memory of confidence. For example, only when the last time the gripper is released or closed until the next time the gripper is released or closed is less than the predetermined time, the rotation of the motor Only in the opposite direction. Such as the predetermined time is less than 5s or 10s or other values. See Figure 47 for the control logic in this mode. Specifically, the mode selector is triggered. If not, the motor does not rotate. If it is, the motor rotates in the first direction. Operate the mode selector again to determine whether the control module has received it. Trigger signal and whether it is operated within a preset time. If it is, the motor rotates in the second direction opposite to the last time. If the control module receives the trigger signal but the time exceeds the preset time, the motor defaults to rotate along the first time. Direction. Of course, if the control module does not receive the trigger signal, the motor does not rotate.

In one embodiment, the mode selector 301a is a push-type structure. In other words, the mode selector 301a and the switchboard are both press-type. When the operator presses the mode selector 301a, the mode selector 301a moves from the first position to the second position, the locking element 130a locks the body 151a circumferentially, and the body 151a cannot rotate relative to the casing. When the operator releases the mode selector 301a, the mode selector 301a is automatically reset, the locking element 130a is disengaged from the body 151a, and the body 151a can rotate relative to the casing. Of course, in other embodiments of the present invention, the mode selector 301a may also be a sliding button, a dial, or the like.

In one embodiment, the mode selector 301a is disposed near the switch. It can be understood that the mode selection member 301a may be located above the switchboard machine, directly above, or diagonally above. Of course, in other embodiments of the present invention, the mode selection member 301a may also be located below the switch trigger or other positions close to the switch trigger. This can ensure that the mode selector 301a is located near the switchboard machine. When the operator holds the handle part with one hand, the mode selector 301a can be operated with one finger to achieve one-handed operation: at the same time, the other hand can be supported For tool heads (such as batch heads or others), the disassembly and assembly process of the entire tool head has better maneuverability and optimizes the user experience.

Exemplarily, the mode selector 301a is located above the switchboard machine. When the mode selector 301a is in the first position, the operator can press the switch trigger in the bending direction of the gripping finger while holding the handle portion, so that the switch trigger is moved closer to the palm position to start the motor 12a.

In one embodiment, the control module 66 further includes an interlock control unit. When the motor 12a is activated by one of the mode selector 301a or the switch trigger, the interlock control unit makes the motor 12a no longer follow the other two. Operation for rotation. In other words, when one of the switch board machine and the mode operating member is connected to the control module 66, the other is short-circuited with the control module 66 before, and it does not work no matter how much it is pressed. Exemplarily, when the mode selector 301a controls the bypass switch 308a to turn on the control module 66, the interlocking unit causes the switch board machine and the control module 66 to be disconnected. The switch board machine does not operate no matter how the switch board machine is pressed. This can ensure the safety of the handheld power tool during operation.

It should be noted that the controller has a flag bit. When the flag bit of the controller is N = 0, it means that the controller is powered off, and there is a disconnection between the controller and the switch board machine and the mode operating member. The controller cannot control the motor 12a to rotate. . When the flag of the controller is N = 1, it means that the controller is powered on, and the controller is a path between the trigger and the switch or the mode operating member, and the controller can control the motor 12a to rotate. In addition, when one of the switch board machine and the mode operation member is connected to the controller as a path, the controller's flag bit changes from N = 0 to N = 1, and the other switch board machine and the mode operation member give the switch. After the signal, since the flag bit of the controller is N = 1, it will not have any effect on the circuit that is already connected. In other words, when one of the switch board machine and the mode operating member is in the power circuit, the other component will fail.

It is worth noting that the manner in which the forward rotation and reverse rotation of the motor 12a are controlled by the mode selector 301a in this embodiment is not limited to this embodiment, and can also be applied to other embodiments. For example, as long as the mode selector 301a is The movement between the one position and the second position may be a linear movement. Exemplarily, the method of controlling the forward rotation and reverse rotation of the motor 12a through the mode selector 301a can also be applied to the third embodiment, and only a simple deformation of the trigger mechanism is required.

The present invention also provides a method for closing and expanding a hand-held power tool gripper 152a. The control method is applied to the hand-held power tool of any of the above embodiments, and the rotation of the motor 12a is automatically controlled by the control mode selector 301a. To lock or release. The control method includes the following steps:

S1: Operate the mode selector with the hand holding the handle to move the mode selector from the first position to the second position; S2: Release the mode selector; S3: Use the hand to operate the mode selector with the handle again It moves from the first position to the second position; S4: release mode selector.

Before moving the operation mode selector from the first position to the second position, the method further includes moving the mode selector from the initial position to the first position. Preferably, the movement of the operation mode selector from the first position to the second position is a linear movement, and the movement of the operation mode selector from the initial position to the first position is a rotary movement. Preferably, the direction of the linear movement of the mode selector from the first position to the second position is a first direction along the axis of the motor, wherein the first direction is a direction away from the chuck mechanism and close to the motor, the operation mode Rotating the selector from the initial position to the first position rotates the mode selector about the pivot axis.

Preferably, in the above step S1, the motor is rotated in the first rotation direction, and in the above step S3, the motor is rotated in the second rotation direction opposite to the first rotation direction.

When the rotation direction of the motor is controlled by the reversing switch in the chuck adjustment mode, the operation method is as follows, S10: Operate the reversing switch with the hand holding the handle portion, and move the reversing switch to the first control position or Second control position; S11: Operate the mode selector with a hand holding the handle portion to move the mode selector from the first position to the second position; S12: Release the mode selector.

Referring to FIG. 57, FIG. 57 shows connection relationships of a trigger switch, a reversing switch, a control module, a trigger mechanism, and a bypass switch. The power tool includes two parallel circuits that can control the direction of rotation of the motor. When the mode selector is in the second position, the first switch is triggered (bypass switch 308a), and the hand-held power tool is in the When the chuck adjustment mode is activated, the first switch is triggered to start the first control circuit to control the motor to rotate forward or reverse in a preset mode regardless of the reversing switch; or the trigger switch is triggered to start the second control circuit and control the motor in accordance with The reversing signal of the reversing switch is forward or reverse. When the mode selector is in the first position, the second control circuit is activated to control the motor to rotate forward or reverse according to the reversing signal of the reversing switch. The step of starting the first control circuit to control the motor to rotate forward or reverse according to a preset mode regardless of the reversing switch includes: the control module determines whether the signal detection mode (ie, the trigger switch) generates a trigger signal; if yes, then The control motor rotates according to a preset first direction, where the first direction is forward or reverse; the first switch is triggered again to determine whether the signal detection module detects a trigger signal; if so, the control motor rotates in a direction opposite to the first direction Turn in the second direction. When the first switch is triggered again, determining whether the signal detection module detects the trigger signal includes: determining whether the first switch is triggered again, and whether the time when the signal detection module detects the trigger signal satisfies a preset first time, and if so, controls The motor rotates in a second direction opposite to the first direction. Determine whether a trigger signal is detected in the signal detection mode; if so, control the motor to rotate in a preset direction, that is, the first direction, and modify the preset direction to a second direction opposite to the first direction, where the first direction is a forward rotation Or reverse; the first switch is triggered again to determine whether the signal detection module detects the trigger signal; if so, the motor is controlled to rotate according to a preset second direction, and the preset direction is changed to the first direction. The trigger switch is triggered to start the second control circuit, and the step of controlling the motor to rotate forward or reverse according to the turning signal of the reversing switch includes: the trigger switch is triggered to start the second control circuit; the control module obtains the current turning signal of the reversing switch. ; The control module controls the motor to rotate forward or reverse according to the current steering signal. When the first control circuit starts, the control motor rotates forward or reverse according to a preset mode regardless of the reversing switch. At this time, the control module shields the trigger signal of the trigger switch; when the second control circuit When starting, the control motor rotates forward or reverse according to the position of the reversing switch. At this time, the control module shields the trigger signal of the first switch.

When the operator controls the gripper 152a of the hand-held power tool to close or open, the operation mode selector 301a moves from the first position to the second position, so that the hand-held power tool is in the chuck adjustment mode. The signal detection module can generate a trigger signal and The trigger signal is passed to the control module 66. After receiving the trigger signal, the control module 66 can process the trigger signal according to the rotation direction, so that the motor 12a rotates according to the preset first rotation direction. At this time, the motor 12a can drive the nut sleeve 154a relative to the clamp through the output ring gear 1582. The claw 152a rotates to realize one action of closing or expanding the clamping jaw 152a, for example, closing the clamping jaw 152a to lock the tool head.

The operation mode selector 301 a is moved from the first position to the second position again, so that the hand-held power tool is in the chuck adjustment mode. The signal detection module can generate a trigger signal and transmit the trigger signal to the control module 66. After receiving the trigger signal, the control module 66 can process the trigger signal according to the rotation direction, so that the motor 12a rotates according to the preset second rotation direction. At this time, the motor 12a can drive the nut sleeve 154a relative to the clamp through the output ring gear 1582. The claw 152a is rotated to realize another action of closing or expanding the clamping claw 152a, for example, the clamping claw 152a is opened to release the tool head.

In one embodiment, the signal detection module includes a bypass switch 308a, and the steps of the signal detection module generating a trigger signal and outputting the trigger signal to the control module 66 include: operating mode selector 301a to the chuck adjustment mode to close the bypass switch 308a, bypass The switch 308 a outputs a high-level signal to the control module 66.

After the operator operates the mode selector 301a, the mode selector 301a moves and puts the hand-held power tool in the chuck adjustment mode. The mode selector 301a can trigger the bypass switch 308a to be closed by the switch trigger 306a to close the bypass switch 308a. Then, it is connected to the control module 66. At this time, the bypass switch 308a can output a working signal to the controller, and the control module 66 controls the motor 12a to rotate in a predetermined direction. It can be understood that the working signal here is the trigger signal described above. Optionally, the working signal is a high-level signal.

In an embodiment, the operation mode selector 301a to the chuck adjustment mode causes the bypass switch 308a to be closed. After the bypass switch 308a outputs a high-level signal to the control module 66, the method further includes the following steps: the operation mode selector 301a resets under the action of the mode reset element to turn off the bypass switch 308a, and the bypass switch 308a cannot output a high-level signal.

After the closing and opening operation of the gripper 152a is completed, the mode selector 301a returns from the second position to the first position at the mode reset element. At this time, the bypass switch 308a forms a disconnection with the controller, and the bypass switch 308a cannot output. The operation signal, and thus the control module 66 cannot control the motor 12a to rotate.

Fifth Embodiment

43-53 are schematic diagrams of a screwdriver 10b according to a fifth embodiment of the present invention. The screwdriver 10b includes a casing, a motor 12b, a battery for power supply, a transmission mechanism, and a chuck assembly. The chuck assembly includes a chuck housing. (Front case) 1104b and output device 15b located at least partially within the chuck case 1104b. Specifically, the cabinet includes a rear case 1103b extending horizontally, a handle case 1102b for forming a holding handle fixedly connected to the rear case 1103b, a chuck case 1104b (front case), and a rear case. The body 1103b is abutted to form a main casing extending in the horizontal direction, and the main casing forms a receiving cavity for receiving at least a part of the output device 15b.

The motor 12b is disposed in the casing and outputs rotational power. The output device 15b includes an output shaft 150b, and the output shaft 150b is provided with a receiving hole 1500b for receiving a tool head. The transmission mechanism is located between the motor 12b and the output device 15b to transmit the rotational power of the motor 12b to the output device 15b. The mode selection mechanism is used to switch the screwdriver 10b at least between the drilling mode or the chuck adjustment mode.

As shown in FIGS. 43-44, the output shaft 150b includes a main body 151b, a clamping jaw (not shown) provided around the receiving hole 1500b to hold the tool head, and a clamping force provided on the body 151b to receive the clamping jaw. The clamping slot 153b, the output device 15a further includes an output planetary gear 1581b, an output ring gear 1582b located outside the output planetary gear 1581b, and an adjusting member provided outside the body 151b and capable of rotating relative to the body 151b and the clamping jaw to lock or open the clamping jaw It is basically the same as the above embodiment. The adjusting member includes a nut sleeve 154b. The inner wall of the nut sleeve 154b is provided with an internal thread (not shown in the figure). The side of the jaw facing the internal thread is provided with an external thread. When 154b rotates relative to the clamping jaw, the interaction between the internal thread and the external thread causes the clamping jaw to open or close. The transmission mechanism is provided with an output sun gear 1583b for driving the output planet gear 1581b to rotate.

As shown in FIGS. 43 to 50, the mode selection mechanism includes a connection member 420 b capable of connecting the output ring gear 1582 b and the adjustment member under the action of the mode selector 301 b along the motor shaft axially, and can selectively prevent the output ring gear 1582 b. Or the locking element 130b of the body 151b is rotated. The locking element 130b is provided non-rotatably with respect to the casing. Among them, when in the drilling mode (see FIGS. 43-46), the locking element 130b is separated from the body 151b and connected to the output ring gear 1582b to prevent the output ring gear 1582b from rotating in the circumferential direction, and the output ring gear 1582b and the adjustment The power between the pieces is disconnected and transmitted under the action of the connecting piece 420b, so that the body 151b and the clamping jaw can be rotated by the motor 12b to drive the tool head to perform the work; when the screwdriver 10b is switched from the drilling mode to the chuck adjustment In the mode (refer to FIGS. 47 to 50), the locking element 130b is connected to the body 151b and disengaged from the output ring gear 1582b to prevent the body 151b from rotating in the circumferential direction and release the circumferential limitation of the output ring gear 1582b, and the output ring gear 1582b The adjustment member is connected under the action of the connecting member 420b, so that the output ring gear 1582b can drive the adjustment member to rotate relative to the body 151b and the clamping jaw to realize the opening or closing of the clamping jaw under the action of the motor 12b. Therefore, as with the first embodiment described above, the locking element 130b in this embodiment includes both a body lock for locking the body 151b and an internal ring gear lock for locking the output ring gear 1582b. In other words, the The main body lock of the locking body 151b and the inner ring gear lock for locking the output ring gear 1582b are inseparably connected or integrally formed. Unlike the first embodiment described above, this embodiment enables the autochuck mode by providing a connecting member 420b. The output ring gear 1582b is connected in the rotation direction of the adjusting member, but in the drill mode, the output ring gear 1582b and the adjusting member are disconnected in the rotating direction, instead of being realized by axially moving the output ring gear 1582b.

Referring to FIG. 51, the mode selection mechanism includes a bracket 140 slidably disposed on the casing, a first push rod assembly 451b, and a mode connection member 302b. The bracket 140 includes a first sliding section 1401 extending along the axial direction of the motor shaft and a second sliding section 1403 disposed perpendicularly to the first sliding section 1401. The mode connection piece 302b is located between the second sliding section 1403 and the first putter assembly 451b, and is linked with the first putter assembly 451b to transmit the movement of the mode selection member 301b to the first putter assembly 451b to realize a handheld type Power tool mode switch.

It can be understood that the mode connection member 302b can be rotated relative to the bracket between the first operation position and the second operation position. After the mode connection piece 302b is rotated to the first operation position, the mode connection piece 302b can be pressed and the bracket 140 can be moved to lock the body circumferentially by locking the locking element, thereby realizing the mode switching of the hand-held power tool. When the rotary trigger is in the second operation position, the mode connection member 302b is in a free state and can be rotated relative to the bracket 140. When the operator operates the mode connector 302b, the bracket 140 cannot be moved.

It is worth noting that when the mode connection piece 302b is in the first operation position, the mode connection piece 302b moves to the extreme position, and the operation mode connection piece 302b can drive the bracket 140 to move synchronously. In addition, the mode connector 302b can only rotate between the first operation position and the second operation position. When the mode connection member 302b is in the second operation position, since the movement of the mode connection member 302b to the first operation position is not restricted, after the operator touches the mode connection member 302b, the mode connection member 302b will rotate relative to the bracket 140. Therefore, when a mode switch is required, the mode connector 302b can be rotated to the first operation position, and after the mode switch is completed, the mode connector 302b is rotated from the first operation position back to the second operation position.

After setting the mode connector 302b, it is convenient for the operator to identify the control buttons in the drill mode or the autochuck mode. Specifically, when the hand-held power tool is in a drill mode, the operator needs to operate the switchboard machine. If the operator touches the mode connector 302b, the mode connector 302b will rotate relative to the bracket 140, and the operator can clearly know that the operation position of the finger is misplaced and needs to be adjusted again. When the hand-held power tool needs to be switched to the autochuck mode, the operator's finger contacts the mode connector 302b, the mode connector 302b moves from the second operation position to the first operation position, and then presses the mode connector 302b to pass The mode connector 302b drives the bracket 140 to move from the first position to the second position.

In addition, the mode connection member 302b can increase the operating area of the mode selection member, while facilitating the operator to operate the mode selection member, it can also prevent the operator from pressing the wrong operation key. For example, when the mode selector and the switch board are in the pressing mode, the operator can clearly know whether the wrong button is pressed due to the setting of the mode connection member 302b.

Exemplarily, the first operation position is a vertical position, the second operation position is an inclined position, and the rear end of the rotary plate moving member is inclined toward a direction away from the first operation position. Of course, in other embodiments of the present invention, the first operation position and the second operation position may also be other positions that are easily mentioned above.

In this specific embodiment, the second sliding section 1403 of the bracket 140 is U-shaped facing away from the first sliding section 1401, the first pusher assembly 451b is connected to the open end of the second sliding section 1403, and the pattern connector 302b It is a U-shaped elastic steel wire whose opening faces the first push rod assembly 451b, and drives the first push rod assembly 451b to interlock the locking element 130b and the connecting member 420b under the action of an external force.

The first push rod assembly 451b includes a first connecting rod 4513b and a first connecting rod 4513b. One end of the first connecting rod 4513b is connected to the mode connecting piece 302b, and the other end is connected to the locking element 130b and the connecting piece 420b in common. The locking element 130b and the connecting member 402b are driven to move forward and backward simultaneously in the axial direction.

Same as the fourth embodiment, please refer to FIGS. 43-46. When the screwdriver 10b is in the drill mode, the locking element 130b is disengaged from the engaging teeth (not shown in the figure) on the body 151b and is engaged with the output ring gear. The engaging tooth portion (not shown) of 1582b is engaged, and the output ring gear 1582b is fixed relative to the casing; at the same time, the connecting member 420b is disengaged from the output ring gear 1582b.

Please refer to FIGS. 47-48. When the screwdriver 10b is switched from the drill mode to the autochuck mode, the locking element 130b and the connecting member 420b move axially backwards under the action of the first link 4513b, and the locking element 130b After being disconnected from the output ring gear 1582b, it continues to move to engage with the meshing teeth on the body 151b. Accordingly, the connecting member 420b meshes with the meshing tooth portion of the output ring gear 1582b.

It should be noted that in order to prevent the motor 12b from stalling when the connecting member 420b meshes with the output ring gear 1582b before the locking element 130b has disengaged the output ring gear 1582b, in this embodiment, preferably, the connecting member 420b and the output The axial distance d1 between the ring gears 1582b is greater than or equal to the axial length L1 of the output ring gear 1582b. Preferably, in this embodiment, the axial distance d1 between the connecting member 420b and the output ring gear 1582b is greater than or equal to the axial length L1 of the output ring gear 1582a. In one embodiment, it is understood that the connecting member 420b is close to the output ring gear 1582b. The distance from the side of the locking element 130b to the side of the output ring gear 1582b close to the output ring gear 1582b is d1, and the distance between the two side end surfaces of the output ring gear 1582b in the axial direction is L1 (not shown in the figure), and d1 is greater than or equal to L1. Among them, d1 is greater than or equal to L1 to prevent the motor 12b from stalling when the connecting member 420b meshes with the output ring gear 1582b before the locking element 130b has disengaged from the output ring gear 1582b. It can be understood that in other embodiments, the connection The axial distance d1 between the element 420b and the output ring gear 1582b is greater than or equal to the axial length L1 of the output ring gear 1582a. The axial distance between the connecting member 420d and the locking element 130d can make the output ring gear 1582d The meshing teeth will not simultaneously mesh with the meshing teeth on the connecting member 420d and the meshing teeth of the locking element 130d.

Please refer to FIGS. 49 to 50. When the screwdriver 10a is switched to the autochuck mode, the locking element 130a is disengaged from the meshing teeth of the output ring gear 1582a and meshes with the meshing teeth on the body 151a, and the body 151a is in the rotation direction. The upper part is locked, and at the same time, the connecting member 420a is connected to both the output ring gear 1582a and the first clutch member 21a, so that the adjusting member can be rotated relative to the body to open or close the jaw.

Please refer to Figure 43-Figure 50 again. The screwdriver 10b also includes between the adjustment member and the output ring gear 1582b for disconnecting between the output ring gear 1582b and the adjustment member in auto chuck mode and the jaws are opened or closed. A clutch mechanism 20b for torque transmission. The clutch mechanism 20b includes a first clutch member 21b that can be rotatably connected to the output ring gear 1582b, a second clutch member 22b that is rotatably connected to the adjustment member and can move axially relative to the adjustment member, and a clutch. The elastic member 23b. In this embodiment, the clutch elastic member 23b is located between the second clutch member 22b and the chuck housing 1104b (front housing). When the jaw is clamped or fully opened, the second clutch member 22b compresses the clutch elastic member 23b. The second clutch member 22b moves forward in the axial direction, the first clutch member 21b is disengaged from the second clutch member 22b, and the output ring gear 1582b no longer transmits torque to the adjusting member (nut sleeve 154a). Preferably, the first clutch member 21b is a snap ring sleeved on the outer periphery of the body 151b. The snap ring is provided with an axially extending clutch tooth groove (not shown in the figure, see FIG. 31 for details). Coupling connecting teeth (not shown in the figure, see FIG. 31 for details). In this embodiment, the connecting member 420b and the first clutch 21b are always engaged, that is, the connecting teeth are always located in the clutch slot, and the connecting teeth are moved axially backward in the clutch slot, that is, approaching axially. The output ring gear 1582b moves in the direction, so that the first clutch 21b and the output ring gear 1582b are connected. Of course, it can be understood that in other embodiments, the clutch structure 20b can also be provided in other ways, such as the clutch elastic member 23b is located between the first clutch member 21b and the housing 11b. After the clamping jaws are clamped or fully opened, the first A clutch member 21b compresses the clutch elastic member 23a, the first clutch member 21b moves axially, the first clutch member 21b is disengaged from the second clutch member 22b, and the output ring gear 1582b no longer transmits torque to the nut sleeve 154b.

Please refer to FIGS. 43 to 50. The mode selection mechanism further includes a mode selection member 301b capable of moving between the first position and the second position relative to the casing. When the mode selection member 301b is in the first position, the handheld power tool 10b In the drilling mode; when the mode selector 301b is in the second position, the handheld power tool 10b is in the chuck adjustment mode; when the mode selector 301b is moved from the first position to the second position, the mode selector 301b is away from the first The end (the output shaft 150b has an end provided with a receiving hole 1500b in the axial direction) is moved. In this embodiment, the movement of the mode selection member 301b between the first position and the second position is an axial movement along the motor shaft, that is, the mode selection member 301b moves in the first position and the second position along the front-rear direction of the main housing 1101. Between positions.

Please refer to FIG. 51 together. The mode selector 301b is pivoted to an end of the first sliding section 1401 that is not connected to the second sliding section 1403, and is exposed outside the handle portion. The switch trigger of the motor 12b is provided to be able to rotate relative to the bracket 140 between the initial position and the first position. Specifically, one of the mode selector 301b and the main body portion is provided with a clamping block 3010, and the other of the two is provided with a card slot (not shown).

Please continue to refer to FIGS. 43 to 50. When the mode selection member 301b is located at the initial position, the clamping block 3010 is mated with the card slot, and the mode selection member 301b is locked with respect to the casing, but cannot be pivoted with respect to the bracket 140 to avoid the mode selection member 301b was easily activated by accidental touch. When the mode selection member 301b is switched from the initial position to the first position, the clamping block 3010 is released from the restriction of the card slot. At this time, the mode selection member 301b can be normally activated under the external force, so as to be between the first position and the second position. The movement enables the hand-held power tool to be operatively switched between at least a drilling mode and a chuck adjustment mode.

The mode selection mechanism further includes a first resetting elastic member (not shown). The first resetting elastic member is deformably connected between the bracket 140 and the casing, and is used when the hand-held power tool is switched from the drill mode to the autochuck mode. The first reset elastic member stores energy; and when the hand-held power tool is switched from the automatic mode to the drill mode, the first reset elastic member releases energy, and the driving mode selection member 301b is moved from the second position to the first position to complete Switching of hand-held power tool drill mode.

Specifically, when the mode selector 301b moves from the first position to the second position under the action of an external force, the first sliding section 1401 and the second sliding section 1403 are synchronized and linked in the same direction (that is, backward movement) to drive the first The connecting rod 4513b drives the locking element 130b and the connecting member 420b to move axially backward. At this time, the first resetting elastic member stores energy, the locking element 130b is connected with the body 151b in the rotation direction, the body 151b is locked, and the connecting member 420b is axially moved backward and connected with the output ring gear 1582b. The screwdriver is switched to auto chuck mode.

When the external force disappears, the first resetting elastic member releases energy, the bracket 140 moves from back to front under the action of the elastic force, and the driving mode selection member 301b moves from the second position to the first position under the action of the elastic force, and drives the first A connecting rod 4513b drives the locking element 130b and the connecting member 420b to move forward in the axial direction. At this time, the connecting member 420b is located on the side of the output ring gear 1582b away from the motor 12b and is connected with the adjusting member without relative rotation. The locking element 130b is located in the second locking position. The locking element 130b releases the body 151b by axial movement. Circumferentially lock and circumferentially lock the output ring gear 1582b. At the same time, the connecting member 420b disconnects the connection between the output ring gear 1582b and the adjusting member. The output planetary gear 1581b can drive the body 151b and the clamping jaws located in the body 151b to rotate together. .

The transmission mechanism is located between the motor 12b and the output device 15b. The transmission mechanism includes a speed-shiftable ring gear that is movable by the shaft so that the transmission mechanism outputs at least two different first and second transmission ratios. The handheld power tool has at least a A low speed position corresponding to one transmission ratio and a high speed position corresponding to a second transmission ratio.

The transmission mechanism is the same as the first implementation. In this embodiment, the transmission mechanism is a planetary gear reduction mechanism 13b. The planetary gear reduction mechanism 13b is preferably a two-stage planetary gear reduction mechanism, including a first-stage planet close to the motor. Gear train, second stage planetary gear train near the output device 15b. The first stage planetary gear train 131b includes a first sun gear 1310b fixed to a motor shaft 121b, a first planet gear 1311b meshed with the first sun gear 1310b and disposed on the outer periphery of the first sun gear 1310b, and a first planet gear 1311b. The meshed first ring gear 1312b and the first planet carrier 1313b for supporting the first planet gear 1311b. The second-stage planetary gear train 132b includes a second sun gear 1320b fixedly disposed on the first planet carrier 1313b, and A second planetary gear 1321b meshed by the two sun gears 1320b, a second ring gear 1322b meshed with the second planetary gear 1321b, and a second planet carrier 1323b for supporting the second planetary gear 1321b. The second ring gear 1322b (that is, equivalent to the shifting ring gear in this embodiment) can move between the first shifting position near the motor and the second shifting position away from the motor along the 121b with respect to the casing. When the second ring gear 1322b is in the first shifting position, the second ring gear 1322b is rotatably disposed in the casing, and the second ring gear 1322b meshes with the first planet carrier 1313b and the second planet gear 1321b at the same time. Therefore, the first planet carrier 1313b, the second planet gear 1321b, and the second ring gear 1322b rotate together, and the second stage planetary gear train 132b has no deceleration output, that is, the second planet carrier 1323b has the same rotation speed as the first planet carrier 1313b. The second planet carrier 1323b outputs high speed. When the second ring gear 1322b is located in the second shifting position, the second ring gear 1322b is fixed to the rear case 110b in a non-rotatable manner in the circumferential direction, and the second ring gear 1322b is in contact with the first planet during the axial movement. The carrier 1313b is disengaged but the second ring gear 1322b is still engaged with the second planetary gear 1321b, so that the second planetary carrier 1323b outputs a predetermined reduction gear ratio relative to the first planetary carrier 1313b, and the second planetary carrier 1323b outputs Low speed. At the same time, when the mode selector 301b is moved from the first position to the second position, the second ring gear 1322b (that is, the speed change ring gear) can be moved to the first speed change position.

Please refer to FIGS. 51-53. This embodiment discloses that when the mode selector 301b is switched from the first position to the second position (that is, the hand-held power tool is switched from the drill mode to the chuck adjustment mode), the mode selector 301b can be linked. The second ring gear 1322b switches to the second shift position (ie, the low speed position) synchronously; and at the same time, when the mode selection member 301b returns to the first position, the speed selection member 1450 is driven by the elastic force of the second reset elastic member 1451. The second ring gear 1322b returns to the first shift position (ie, the high-speed position). In this way, it is guaranteed that in the drill mode, the high and low speed switching is not affected; when in the auto mode, the handheld power tool is forced to run at a low speed, and when it returns to the drill mode, the original high and low speed gears are not affected.

Specifically, the hand-held power tool further includes a speed selection member 1450 connected to the shifting ring gear (that is, the second ring gear 1322b in this embodiment) to drive the shifting ring gear to move in the first and second shifting positions. The second resetting elastic member 1451 (see FIG. 45), the main switching member 1452 and the auxiliary switching member 1453 between the speed selection members 1450.

The speed selection member 1450 is movably connected to the casing, and can move relative to the casing along the axial direction of the motor shaft under the action of an external force. The main switching member 1452 is rotatable about an axis with respect to the casing, and is drivingly connected between the speed selecting member 1450 and the variable speed ring gear. The main switching member 1452 is used to respond to the movement of the speed selecting member 1450 to place the handheld power tool at least in the low speed and high speed positions. Switch. One end of the auxiliary switching member 1453 is connected to the speed selection member 1450, and the other end is detachably abutted with the first link 4513b, so as to realize that the hand-held power tool is forced to be in a low-speed operation state in the autochuck mode, and when it returns to the drill mode It does not affect the original high and low speed gears.

The speed selector 1450 includes a dial body 14501 and a dial 14502. The dial body 14501 is generally a square plate. Two assembly positions 14503 are arranged along the moving direction of the speed selector 1450. The main switch 1452 and the auxiliary switch 1453 follow The speed selection member 1450 moves from the high-speed position to the low-speed position in the assembly position 14503 in sequence. The button 14502 includes a button body 14502a and a protrusion 14502b protruding from the surface of the button body 14502a facing the button body 14501. The protrusion 14502b is embedded in the assembly position 14503 where the main switch 14502 is located. When the knob 14502 is moved from the back to the front, the knob body 14501 is moved by the protrusion 14502b against the main switch 14502. After the knob 14502b is moved in place, the protrusion 14502b can still limit the main switch 14502 to prevent its erroneous movement. In addition, after the dial 14502 is moved into position, it can be fixed relative to the casing by means such as being engaged with the casing to complete the speed switching of the power tool.

The second elastic element 1451 is disposed between the torsion body 14501 and the casing (specifically, the gear box casing), and is used to provide the speed selecting member 1450 with a restoring force for moving from a low speed position to a high speed position.

The main switching member 1452 includes a first free end 14521 and a second free end 14522 which are respectively located on both sides of the pivot connection point between the main switch and the casing. The first free end 14521 is connected to the speed selection member 1450, and the second free end 14522 is connected to the speed change ring gear; and the first free end 14521 and the second free end 14522 rotate in opposite directions around the pivot point under the effect of external force.

Specifically, the first free end 14521 has a substantially arc-shaped structure, and is snapped into one of the assembling positions 14503. The second free end 14522 is formed by bending the ends of the first free end 14521 in an opposite manner, and is hooked on the shifting ring gear to drive the shifting ring gear between the first shifting position and the second shifting position under an external force. Switch.

The auxiliary switching member 1453 includes a third free end 14531 and a fourth free end 14532 respectively located on both sides of the pivot contact point between the auxiliary switch and the casing. The third free end 14531 is connected to the speed selection member 1450, the fourth free end 14532 and the first link 4513b are separably abutted; and the third free end 14531 and the fourth free end 14532 are opposite to each other about the pivot contact point under the action of an external force Direction of rotation.

Specifically, the third free end 14531 has a substantially arc-shaped structure, and is snapped into one of the assembling positions 14503. The fourth free end 14532 is formed by bending the ends of the third free end 14531 away from each other, and is located on a moving path where the first link 4513b moves axially along the motor shaft.

Preferably, the main switching member 1452 and the auxiliary switching member 1453 are pivotally connected to the chassis in a parallel manner, that is, the first free end 14521 in the main switching member 1452 and the third free end 14531 in the auxiliary switching member 1453 are located at the same pivot point. On one side, the second free end 14522 in the main switching member 1452 and the fourth free end 14532 in the auxiliary switching member 1453 are located on the same side of the pivot point.

Please refer to FIGS. 43-46. When the hand-held power tool is in the low speed of the drill, the speed selection member 1450 is located at the front, the first free end 14521 in the main switching member 1452 and the third free end 14531 in the auxiliary switching member 1453 are located. The respective pivot points are close to the side of the first link 4513b, and the second free end 14522 in the main switching member 1452 and the fourth free end 14532 in the auxiliary switching member 1453 are located on the side of the respective pivot points away from the first link 4513b. At this time, the distance between the fourth free end 14532 and the end of the first link 4513b in the auxiliary switching member 1453 is a certain distance.

When the hand-held power tool is switched from the drill low speed to the autochuck mode, pressing the mode selector 301b causes the first link 4513b to move backward to abut the fourth free end 14532 of the auxiliary switch 1453, making the speed selector 1450 can't switch from low speed to high speed under the action of external force, to ensure that the original low speed is always maintained in auto chuck mode.

When the mode selector 301b is released, the hand-held power tool returns to the drill mode from the autochuck mode through the first reset elastic member, and the end of the first link 4513b is away from the fourth free end 14532 of the auxiliary switching member 1453. It is reset and spaced a certain distance from the fourth free end 14532 in the auxiliary switching member 1453. At this time, the main switching member 1452 can be driven by operating the speed selection member 1450 to drive the gear ring gear to freely switch between high and low speed gears.

Please refer to FIGS. 47-48. When the high speed of the drill is switched to the autochuck mode, the speed selector 1450 is located at the rear, the first free end 14521 in the main switch 1452 and the third free end 14531 in the auxiliary switch 1453. Both are located on the side of each pivot point away from the first link 4513b, while the second free end 14522 in the main switching member 1452 and the fourth free end 14532 in the auxiliary switching member 1453 are located on a side of the respective pivot contact near the first link 4513b side. Because the fourth free end 14532 of the auxiliary switching member 1453 is located on the moving path of the first link 4513b moving from front to back, when the mode selector 301b is pressed, the first link 4513b is moved backward, and the first link 4513b will The fourth free end 14532 in the auxiliary switching member 1453 moves backward, and the fourth free end 14532 in the auxiliary switching member 1453 pivots to drive the speed selection member 1450 forward, thereby forcing the main switching member 1452 to shift the gear ring gear from The first shift position (high speed position) is moved to the second shift position (low speed position) to ensure that the low speed position is always maintained in the auto chuck mode.

When the mode selector 301b is released, the hand-held power tool is returned to the drill mode by the first reset elastic member from the autochuck mode, and the speed selector 1450 abutted by the first connecting rod 4513b is under the action of the second reset elastic member 1451. Return to the high speed state, so that the original high speed gear in the drill state is not changed.

Through the design of the above scheme, it can be ensured that the high and low speed switching is not affected during the drilling. When in the autochuck mode, the handheld power tool is forced to run at low speed, and when it returns to the drill mode, the original high and low speed is not affected. Gear.

From the above description of different embodiments, the clutch mechanism and the clamping jaw in the present invention at least partially overlap along the axial direction of the driving shaft. It should be noted that when the clamping jaw is closed or opened, the clamping jaw can be driven along the driving axis. The shaft moves axially away from the front end position of the motor (as shown in FIG. 5) and near the rear end position of the motor (as shown in FIG. 4). In the present invention, the overlap or partial overlap with the clamping jaw along the axial direction of the drive shaft refers to It overlaps at any of the front end position and the rear end position.

The technical features of the embodiments described above can be arbitrarily combined. In order to simplify the description, all possible combinations of the technical features in the above embodiments have not been described. However, as long as there is no contradiction in the combination of these technical features, Should be considered as the scope of the description of this specification.

The above-mentioned embodiments only express several implementation manners of the present invention, and their descriptions are more specific and detailed, but they cannot be understood as limiting the scope of the patent of the present invention. It should be noted that, for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can be made, which all belong to the protection scope of the present invention. Therefore, the protection scope of the invention patent shall be subject to the appended claims.

Claims

A hand-held power tool includes:

A case with a handle portion;

A motor provided in the casing;

A chuck mechanism includes a main body, a plurality of clamping jaws movably disposed relative to the main body, and an adjusting member that is threadedly connected to the plurality of clamping jaws. The relative movement of the adjusting member and the main body can drive the plurality of clamping jaws to close together. Or open to lock or release the tool head;

A transmission mechanism capable of outputting the power of the motor to the chuck mechanism;

A mode selection mechanism for operatively switching the handheld power tool between at least a drilling mode and a chuck adjustment mode; when the handheld power tool is in a drilling mode, the motor can drive the The main body, the clamping jaw, and the adjustment member rotate together; when the hand-held power tool is in a chuck adjustment mode, one of the adjustment member and the body can rotate relative to the other of the two to enable A plurality of the clamping jaws are closed or opened relative to the body; the mode selection mechanism includes a mode selection member capable of moving between a first position and a second position with respect to the casing. When the mode selector is in the first position, the handheld power tool is in a drilling mode; when the mode selector is in the second position, the handheld power tool is in a chuck adjustment mode; the handheld The power tool further includes a control module for responding to the movement of the mode selector when the hand-held power tool is in a chuck adjustment mode, and controlling the motor to rotate in a predetermined direction. To effect opening of the jaws or closed.
The hand-held power tool according to claim 1, wherein when the hand-held power tool is switched to a chuck adjustment mode, the control module is capable of responding to the movement of the mode selector and controlling the motor along the first When the hand-held power tool is switched to the chuck adjustment mode again, the control module can respond to the movement of the mode selector and control the motor to rotate in a second rotation opposite to the first rotation direction. The direction is rotated, so that the alternate operation of the mode selector can realize the alternate opening and closing of the clamping jaws.
The hand-held power tool according to claim 1, wherein the mode selection member is disposed adjacent to the handle portion, and when the operator holds the handle portion, the operator can hold the handle by The hands of the parts operate the mode selector at the same time.
The hand-held power tool according to claim 1, wherein the movement of the mode selector between the first position and the second position is a linear motion.
The hand-held power tool according to claim 4, wherein an end of the chuck mechanism away from the motor is a first end of the chuck mechanism, and when the mode selector is moved from the first position When moving to the second position, the mode selector moves in a direction away from the first end and closer to the motor.
The hand-held power tool according to claim 2, wherein the hand-held power tool includes a trigger mechanism, and when the mode selection member is operated and the hand-held power tool is in a chuck adjustment mode, the trigger mechanism is capable of In response to the operation of the mode selector, the control module controls the motor to rotate in a predetermined rotation direction.
The hand-held power tool according to claim 6, wherein the trigger mechanism comprises a switch trigger and a bypass switch capable of moving under the action of a mode selector, and when the mode selector moves and causes the The hand-held power tool is in a chuck adjustment mode, and the mode selector can trigger the bypass switch to be closed by the switch trigger, so as to conduct the bypass switch to the control module and enable the control The module controls the motor to rotate in a predetermined direction.
The handheld power tool according to claim 6, wherein the trigger mechanism comprises a signal detection module, and the signal detection module is electrically connected to the control module, and when the mode selector moves and makes the handheld The power tool is in a chuck adjustment mode. The signal detection module can generate a trigger signal and transmit the trigger signal to the control module. The control module controls the motor to rotate in a predetermined rotation direction.
The hand-held power tool according to claim 8, wherein the hand-held power tool further comprises a power supply source, and the signal detection module includes a first trigger member electrically connected to the power supply source and the power source A second trigger element electrically connected to the control module, when the mode selection element moves along the first position to the second position, the first trigger element or the second trigger element selects in the mode And the first trigger is electrically connected to the second trigger, and the signal detection module generates a high-level signal and transmits it to the control module to enable the control module to control the The motor rotates in a predetermined rotation direction.
The handheld power tool according to any one of claims 8 or 9, wherein the control module includes a signal processing unit and a controller for controlling the rotation of the motor, and the signal processing unit is configured to receive a signal The trigger signal of the detection module detects the signal according to the rotation direction of the motor in the last chuck adjustment mode and outputs the signal to the controller. The controller controls the motor to rotate in a direction opposite to that in the last chuck adjustment mode.
The hand-held power tool according to any one of claims 1 to 9, wherein the casing further comprises a main body portion that houses the motor and extends in the axial direction of the motor, and the handle portion and the main body portion Set at an angle, the power tool further includes a switch trigger provided on the handle portion. When the hand-held power tool is in a drilling mode, an operator can press the finger in the bending direction of the holding finger while holding the handle portion. Switching the trigger thereby moves the switch trigger closer to the palm position to activate the motor.
The hand-held power tool according to claim 11, wherein the control module further comprises an interlocking control unit, and when the motor is started under the action of one of the mode selector or the switch trigger, The interlocking control unit makes the motor no longer rotate according to the other two operations.
The hand-held power tool according to any one of claims 1 to 9, wherein the movement of the mode selector between the first position and the second position is an axial movement of the motor.
The hand-held power tool according to any one of claims 1 to 9, wherein the mode selection mechanism further comprises a mode resetting element elastically abutting the mode selection element, and the mode selection element is operable It overcomes the force of the mode resetting element to move from the first position to the second position, and can recover from the second position to the first position under the action of the elastic force of the mode resetting element.
The hand-held power tool according to claim 11, wherein the mode selection mechanism includes a bracket slidably disposed on the casing, and the mode selection member is pivotally disposed on the bracket and can be opposite to each other. As the bracket rotates between an initial position and a first position, the initial position is close to the body and away from the switch trigger relative to the first position.
The hand-held power tool according to claim 15, wherein a rotation resetting member is further provided between the mode selecting member and the casing, and the mode selecting member is operable to overcome a force of the mode resetting member. It moves from the initial position to the first position, and can return to the initial position from the first position under the action of the rotating reset member.
The hand-held power tool according to any one of claims 1 to 9, wherein the mode selection mechanism further comprises a connecting member capable of axially moving along the motor shaft under the action of the mode selection member and A locking element, which is arranged non-rotatably with respect to the casing;

When the hand-held power tool is in the chuck adjustment mode, the locking element locks the body relative to the casing, the connection member connects the adjustment member and the motor shaft in a rotation direction, and the control module Controlling the motor to rotate and transmitting power to the adjusting member through the motor, so that the adjusting member can rotate relative to the body and the clamping claw;

When the hand-held power tool is in a drilling mode, the locking element is separated from the body, and the connecting member disconnects power transmission between the motor shaft and the adjusting member, and the body is in the motor After starting, it can be driven by the motor shaft to drive the clamping jaw and the adjusting member to rotate.
The hand-held power tool according to claim 17, wherein when the hand-held power tool is switched between the drilling mode and the chuck adjustment mode by a mode selection member, the connecting member and the locking element are at The mode selector moves synchronously.
The hand-held power tool according to claim 17, wherein the moving direction of the connecting member and the locking element is the same as the moving direction of the mode selecting member.
A method for operating a handheld power tool, which is applied to the handheld power tool according to claim 1, wherein the operation method includes the following steps:

S1: Operate the mode selector with the hand holding the handle portion, and move the mode selector from the first position to the second position;

S2: Release mode selector.
The operation method according to claim 20, wherein:

S3: once again select the hand operation mode selector holding the handle to move it from the first position to the second position;

S4: Release mode selector.
The operation method according to claim 20 or 21, before the operation mode selection member is moved from the first position to the second position, further comprising moving the mode selection member from the initial position to the first position.
The operation method according to claim 22, wherein the motion of the operation mode selector from the first position to the second position is a linear motion, and the motion of the operation mode selector from the initial position to the first position is a rotational motion.
The operating method according to claim 23, wherein the direction of the linear movement of the mode selector from the first position to the second position is a first direction along the motor axis, wherein the first direction is away from the chuck The mechanism is close to the direction of the motor, and when the operation mode selection member is rotated from the initial position to the first position, the mode selection member is rotated about a pivot axis.
The operating method according to claim 21, wherein in the step S1, the motor rotates in a first rotation direction, and in the step S3, the motor rotates in a second rotation direction opposite to the first rotation direction .
A method for operating a hand-held power tool, which is applied to the hand-held power tool according to claim 1, wherein the hand-held power tool includes a reversing switch for controlling motor steering, and the reversing switch has a first control The position and the second control position, wherein the control method includes the following steps:

S10: Operate the reversing switch with a hand holding the handle portion, and move the reversing switch to the first control position or the second control position;

S11: Operate the mode selector with a hand holding the handle portion, and move the mode selector from the first position to the second position;

S12: Release mode selector.
A control method of a hand-held power tool, which is applied to the hand-held power tool according to claim 1, the hand-held tool includes a trigger switch for starting a drilling mode, and controls a motor to perform forward and reverse direction The reversing switch is characterized in that when the mode selector is in the second position, the first switch is triggered, the hand-held power tool is in a start-up chuck adjustment mode, and the control method includes:

The first switch is triggered to start the first control circuit, and the control module controls the motor to rotate forward or reverse in a preset mode regardless of the reversing switch; or

The trigger switch is triggered to start the second control circuit, and the control module controls the motor to rotate forward or reverse according to the reversing signal of the reversing switch.
The control method according to claim 27, wherein the control method further comprises: when the mode selector is in the first position, activating a second control circuit, and controlling the motor to be positive according to a commutation signal of a commutation switch. Turn or reverse.
The control method according to claim 27, wherein the step of starting the first control circuit and controlling the motor to rotate forward or reverse in a preset mode irrespective of the commutation switch comprises:

Determine whether the signal detection mode generates a trigger signal;

If yes, the control module controls the motor to rotate according to a preset first direction, where the first direction is forward rotation or reverse rotation;

The first switch is triggered again to determine whether the signal detection module detects a trigger signal;

If so, the control motor is rotated in a second direction opposite to the first direction.
The control method according to claim 29, wherein the step of triggering the first switch again and determining whether the signal detection module generates a trigger signal comprises:

It is determined whether the first switch is triggered again, and the control module detects whether the time of the trigger signal meets the preset first time, and if so, controls the motor to rotate in a second direction opposite to the first direction.
The control method according to claim 29, wherein the control method specifically comprises:

Determine whether the signal detection mode generates a trigger signal;

If yes, control the motor to rotate according to a preset direction, that is, the first direction, and modify the preset direction to a second direction opposite to the first direction, where the first direction is a forward rotation or a reverse rotation;

The first switch is triggered again to determine whether the signal detection module generates a trigger signal;

If yes, the control motor is rotated according to a preset second direction, and the preset direction is changed to the first direction.
The control method according to claim 27, wherein the step of triggering the trigger switch, activating a second control circuit, and controlling the motor to rotate forward or reverse according to a turn signal of the reversing switch comprises:

The trigger switch is triggered to start a second control circuit;

The control module obtains the current turning signal of the reversing switch;

The control module controls the motor to control the motor to rotate forward or reverse according to the current steering signal.
The control method according to claim 27, wherein the control method further comprises:

When the first control circuit is started, the control motor rotates forward or reverse according to a preset mode regardless of the reversing switch. At this time, the control module shields the trigger signal of the trigger switch;

When the second control circuit is started, the control motor rotates forward or reverse according to the position of the reversing switch. At this time, the control module shields the trigger signal of the first switch.
A hand-held power tool includes:

A motor having a motor shaft capable of outputting rotational power;

A casing, comprising a handle portion for holding and a main body portion accommodating a motor;

The chuck assembly includes a main body, a plurality of clamping jaws movably disposed relative to the body, and an adjusting member that is threadedly connected to the plurality of clamping jaws. An end of the chuck assembly remote from the motor is the chuck assembly. First end

A transmission mechanism having a drive shaft capable of outputting the power of the motor, and

A mode selection mechanism for operatively switching the handheld power tool between at least a drilling mode and a chuck adjustment mode; when the handheld power tool is in a drilling mode, the drive shaft drives the The body, the clamping jaw, and the adjustment member rotate together; when the hand-held power tool is in a chuck adjustment mode, one of the adjustment member and the body can be driven by the motor relative to the two Another rotation is to move the plurality of clamping jaws relative to the body to close or open; and it is characterized by:

The mode selection mechanism includes a mode selection member capable of moving between a first position and a second position relative to the casing, and when the mode selection member is in the first position, the hand-held power tool is in a drilling mode ;

When the mode selector is in the second position, the hand-held power tool is in the chuck adjustment mode; when the mode selector is moved from the first position to the second position, the mode selector is moved away from the first position. The direction of one end moves; when the operator holds the handle portion, the operator can simultaneously operate the mode selector with a hand holding the handle portion.
The hand-held power tool according to claim 34, wherein the movement of the mode selector between the first position and the second position is an axial movement along the motor shaft.
The hand-held power tool according to claim 34 or 35, wherein the mode selection mechanism further comprises a mode resetting element elastically abutting the mode selection element, and the mode selection element is configured to operatively overcome The force of the mode resetting element moves from the first position to the second position, and can be restored from the second position to the first position under the action of the elastic force of the mode resetting element.
The hand-held power tool according to claim 34, wherein the handle portion is disposed at an angle to the main body portion, the power tool further comprises a switch trigger provided on the handle portion, and the mode selector Set next to the switch trigger.
The hand-held power tool according to claim 34, wherein the mode selection member and the jaw at least partially overlap.
The hand-held power tool according to claim 34, wherein the mode selection mechanism further comprises a connecting member and a locking member capable of axially moving along the motor shaft under the action of the mode selection member, and The locking element is non-rotatably disposed with respect to the casing;

When the mode selecting member is in the second position, the locking element locks the body relative to the casing, and the connecting member can transmit the rotational power of the motor shaft to the adjusting member so that all the The adjusting member can be rotated relative to the body;

When the mode selection member is in the first position, the locking element is separated from the body, the connection member disconnects power transmission between the motor shaft and the adjustment member, and the body is driven by the motor shaft Driving thereby drives the adjustment member to rotate.
The hand-held power tool according to claim 39, wherein when the mode selecting member is moved between the first position and the second position, the connecting member and the locking element are in the mode Synchronized movement under the action of the selector.
The hand-held power tool according to claim 39 or 40, wherein a movement direction of the connecting member and the locking element is the same as a movement direction of the mode selection member.
The hand-held power tool according to claim 39, wherein the transmission mechanism includes an output planetary gear train, and the output planetary gear train includes an output sun gear, which is rotatably engaged with the output sun gear An output planetary gear of the body and an output ring gear matched with the output planetary gear;

When the mode selector is in the first position, the locking element is connected to the output ring gear without relative rotation, and the drive shaft drives the body to rotate through the output planetary gear.
The hand-held power tool according to claim 42, wherein when the mode selector is in the second position, the locking element is disconnected from the output ring gear, and the output ring gear is at The planetary gear rotates under the driving of the planetary gear, and the connection member is transmission-connected between the output ring gear and the adjustment member in a rotation direction to transmit the rotational power of the motor to the adjustment member.
The hand-held power tool according to claim 43, wherein, when the mode selection member is in the first position, the connection member is located on a side of the output ring gear away from the motor and is adjusted with the adjustment The pieces are connected without relative rotation;

When the hand-held power tool is switched from the drilling mode to the chuck adjustment mode, the connecting member and the locking element move along the axis of the motor shaft toward the motor, so that the connection The member meshes with the output ring gear in the rotation direction, and at the same time, the locking element is disengaged from the output ring gear and fixes the body relative to the casing.