WO2013037325A1

WO2013037325A1 - Electrician's screwdriver and portable hand-held tool

Info

Publication number: WO2013037325A1
Application number: PCT/CN2012/081494
Authority: WO
Inventors: 鲍瑞那图强尼
Original assignee: 苏州宝时得电动工具有限公司
Priority date: 2011-09-16
Filing date: 2012-09-17
Publication date: 2013-03-21

Abstract

Disclosed is an electrician's screwdriver comprising a main machine housing, an electricity sensing device provided at the main machine housing, a working portion provided at one end of the machine shell of the main machine, with a motor for driving the working portion being provided within the main machine housing, and a battery unit for providing power for the motor, and with a controlling piece for the control of the motor being provided on the main machine housing; when the controlling piece is controlling the motor to work, the electrician's screwdriver is in an electrical mode, and when the controlling piece is controlling the motor not to work, the electrician's screwdriver is in a manual mode. The screwdriver is suitable for various occasions and is convenient in operation. Also disclosed in the present invention is a portable hand-held tool.

Description

Electrician screwdrivers and portable hand tools

The present invention relates to a portable hand tool and an electrician screwdriver.

Background technique

The electrician screwdrivers commonly used in the market, which have the functions of electric pen, insulation and the like, are small in size, so that it is convenient for the operator to carry around during installation and maintenance work. However, this type of electrician screwdriver is manually operated, and the screwing is time-consuming and labor-intensive, and does not utilize the work efficiency.

The electric screwdriver of the prior art, because of its use of a large electric motor, and a large battery pack for driving the motor, and some metal transmissions, the volume and weight are several times that of ordinary electrician screwdrivers. More than ten times, it is not suitable for some high-altitude places. In addition, electricians often need to detect voltage or work under high voltage conditions. Therefore, ordinary, single-function electric screws often cannot meet such requirements, and must carry other measuring tools, which are inconvenient to operate. In addition, in order to meet the long-term screwing operation, or to screw different materials and specifications for different working conditions, high-power motors, and large-capacity batteries, the total cost of electric screwdrivers is relatively high.

Summary of the invention

In order to overcome the deficiencies of the prior art, the present invention provides an electrician screwdriver which is suitable for various occasions and is convenient to operate.

The present invention is implemented as follows: An electrician screwdriver, comprising: a main body casing, a power measuring device disposed on the main body casing, and a working component disposed at one end of the main body casing, wherein the main casing is provided with a motor, and a battery unit for providing a driving force to the motor, wherein the main body housing is provided with a control member for controlling the motor, and when the control unit controls the operation of the motor, the electrician screwdriver is in an electric mode, when the control unit controls the motor to be inoperative, The electrician screwdriver is in manual mode.

An outer surface of the working component is provided with an insulating material; the motor shaft of the motor is double insulated. The power measuring device is configured to indicate an indicator element for detecting whether the area is charged; the indicator element is configured as a manifold.

a transmission mechanism for transmitting power of the motor to the working component is disposed between the motor and the working component; the transmission mechanism includes a full plastic gear mechanism; a gearbox housing is disposed in the main body housing, and the transmission mechanism is disposed in the gearbox Inside the housing, the gearbox housing is made of a plastic material.

The working component is connected to the main shaft, and a self-locking spindle is disposed between the main shaft and the motor Lock device.

A transmission mechanism is disposed between the motor and the working component, and the transmission mechanism includes an output end carrier, the self-locking device includes an adapter disk fixed opposite to the main shaft, and a fixed disk fixed relative to the main body casing, the fixed disk setting An inner circular surface, the adapter disk is disposed within a range of the inner circular surface, the outer periphery of the adapter disk has a plurality of planes, and the adapter disk is provided with a connection portion connected to the output end carrier, the output The end frame includes a plurality of legs extending between the plane and the inner circular surface, and the adjacent legs are respectively provided with rollers.

The main housing has a longitudinally extending main housing axis, and the working member has a working member axis that coincides or is parallel with the main housing axis.

The main housing has a longitudinally extending main housing axis, the axis of the battery unit being coincident or parallel with the main housing axis.

The ratio of the longitudinal dimension to the lateral dimension of the main body housing is set between 4.4 and 1.25; the ratio of the longitudinal dimension to the lateral dimension is preferably between 7 and 8; the longitudinal dimension of the main housing The setting range is between 200 mm and 35 mm; the lateral dimension of the main housing is set between 28 mm and 45 mm.

The motor includes at least two electric motors connected in series; the two electric motors have the same characteristics; the two electric motors have the same diameter.

The electric motor is an elongated cylindrical motor; the length-to-diameter ratio of the electric motor is set between 1.2 and 2. The length to diameter ratio of the electric motor is preferably set to 1.5.

A coupling is disposed between the two electric motors; the coupling is configured as a torsion spring.

The electrician screwdriver of the invention integrates the hand and the electric operation into one body, and the motor can be switched between the manual and the electric motor by the operation control member, and the operation is convenient; since the crucible is used for two longitudinal arrangement along the main casing The small motor makes the overall volume of the screwdriver small, and the weight is reduced and the cost is greatly reduced due to the use of the all-plastic planetary gear transmission mechanism. The operation is light and easy to carry. Since the hand tool is provided with a measuring device, it is suitable for many Portable hand tools that are convenient and easy to operate.

The invention also provides a low cost, easy to operate hand tool.

The present invention is implemented as follows: A portable hand tool includes: a main body housing, a working component disposed at one end of the main body casing, a power device for driving the working portion, and an energy device for driving the power device The battery unit includes at least two electric motors, and the electric motor is serially connected in the main body casing.

A coupling is disposed between the electric motors. The coupling is provided as a torsion spring.

The electric motor has an elongated cylindrical shape. The length to diameter ratio of the electric motor is set 5。 Between the range of 1.2 to 2. 6; preferably, the selected length to diameter ratio of 1.5.

The electric motor includes two motors of identical characteristics. The electric motor has the same diameter. 5毫米。 The diameter of the electric motor is not more than 38. 5mm.

The ratio of the longitudinal dimension to the lateral dimension of the portable hand tool is set between 4. 4 and 1.25. It is preferable to consider that the ratio of the longitudinal dimension to the lateral dimension is set between 7 and 8. The portable hand tool has a longitudinal dimension setting ranging from 200 mm to 35 mm. The portable hand tool has a lateral dimension setting ranging from 28 mm to 45 mm.

The main housing has a longitudinally extending main housing axis, the motor axis of the electric motor being coincident or parallel with the main housing axis. The axis of the battery unit coincides or is parallel to the axis of the main housing. The working component is parallel or coincident with the axis of the mainframe housing.

The host housing is provided with a power measuring device, and the power measuring device includes an indicating component for indicating whether the detecting area is charged. The indicator element is a fistula.

An outer surface of the working component is provided with an insulating material. The electric motor is a double insulated motor, and the motor shaft of the electric motor is provided with an insulating material.

A transmission mechanism for transmitting power of the power unit to the working member is disposed between the power unit and the working member. The transmission mechanism includes a full plastic gear mechanism. A gear box housing is disposed in the main body housing, and a transmission mechanism is disposed in the gear housing, and the gear housing is made of a plastic material.

The main body housing is provided with a control member for controlling the electric motor. When the control member controls the operation of the electric motor, the portable hand tool is in an electric mode, and when the control member controls the electric motor to be inoperative, the portable hand tool is at Manual mode.

The working component is connected to the main shaft, and a self-locking device for locking the main shaft is disposed between the main shaft and the power unit. A transmission mechanism is disposed between the power device and the working component, the transmission mechanism includes an output end carrier, the self-locking device includes an adapter disk fixed opposite to the main shaft, and a fixed disk fixed relative to the main body casing, The fixed disk is provided with an inner circular surface, the adapter disk is disposed within a range of the inner circular surface, the outer periphery of the adapter disk has a plurality of planes, and the adapter disk is provided with a connection with the output end carrier The output end frame includes a plurality of legs extending between the plane and the inner circular surface, and the adjacent legs are respectively provided with rollers.

The hand tool of the present invention has a lower cost due to the use of the cymbal for the two longitudinally arranged small motors, in particular the small diameter of the motor, which facilitates the small size of the hand tool; the weight is reduced due to the use of the all-plastic planetary gear transmission mechanism. Lightweight and easy to carry; Because of the spindle self-locking mechanism, the hand tool is not only suitable for electric, but also suitable for manual operation, making operation more convenient.

The invention also provides a hand-held tool that is convenient to carry and labor-saving. The present invention is implemented as follows: A portable hand tool includes: a main body casing, a working part disposed at one end of the main body casing, a motor for driving the working part, and a battery for supplying energy to the motor至之间之间之间。 The unit, the ratio of the ratio of the longitudinal dimension to the lateral dimension is set between 4.4 and 1.25.

The portable hand tool preferably takes into account that the ratio of the longitudinal dimension to the lateral dimension is set between 7 and 8. Portable handheld tools have a vertical dimension setting between 200mm and 35mm. Portable hand tools have lateral dimensions ranging from 2 8mm to 45 mm.

The main housing has a longitudinally extending main housing axis, the motor axis of the motor being coincident or parallel with the main housing axis. The axis of the battery unit coincides or is parallel to the axis of the main housing. The working component is parallel or coincident with the axis of the main housing.

The motor includes at least two electric motors that are serially connected within a main housing. A coupling is disposed between the electric motors, and the coupling is provided as a torsion spring.

The electric motor has an elongated cylindrical shape. The length-to-diameter ratio of the electric motor is set between 1.2 and 2. 6; preferably, the selected length-to-diameter ratio is about 1.5.

The electric motor includes two motors of identical characteristics. The electric motor has the same diameter.

An outer surface of the working member is provided with an insulating material, the motor is a double insulated motor, and the motor shaft of the motor is provided with an insulating material.

A transmission mechanism that transmits power of the motor to the working member is disposed between the motor and the working member. The transmission mechanism includes a full plastic gear mechanism, and a gear case housing is disposed in the main body housing, and the transmission mechanism is disposed in the gear case housing, and the gear case housing is made of a plastic material.

The main body housing is provided with a control member for controlling the motor, the portable hand tool is in an electric mode when the control member controls the operation of the motor, and the portable hand tool is in a manual mode when the control member controls the motor to be inoperative.

The working component is connected to the main shaft, and a self-locking device for locking the main shaft is disposed between the main shaft and the motor. A transmission mechanism is disposed between the motor and the working component, the transmission mechanism includes an output end carrier, the self-locking device includes an adapter disk fixed opposite to the main shaft, and a fixed disk fixed relative to the main body casing. The fixed disk is provided with an inner circular surface, the adapter disk is disposed within a range of the inner circular surface, the outer periphery of the adapter disk has a plurality of planes, and the adapter disk is provided with a connection portion connected with the output end carrier The output end frame includes a plurality of legs extending between the plane and the inner circular surface, and the adjacent legs are respectively provided with rollers. Advantageous Effects of the Invention: The hand tool of the present invention uses a suitable range of longitudinal dimension and lateral dimension ratio, so that the body size is easy to operate and carry; because of the use of the all-plastic planetary gear transmission mechanism, the weight is reduced and the operation is light. Easy to carry; Because the spindle self-locking mechanism is provided, the hand tool is not only suitable for electric power, but also suitable for manual operation, which makes the operation more convenient.

DRAWINGS

The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a perspective view of a screwdriver of a specific embodiment of the present invention.

2 is a partial cross-sectional view showing a screwdriver of a specific embodiment of the present invention;

3 is a schematic view showing the structure of a coupling of a screwdriver according to a specific embodiment of the present invention.

Figure 4 is a cross-sectional view taken along line B-B of Figure 3.

Figure 5 is a partially enlarged cross-sectional view of the transmission mechanism of Figure 2.

Figure 6 is an exploded perspective view of the self-locking device of the screwdriver of the embodiment of the present invention.

Figure 7 is a cross-sectional view taken along line A-A of Figure 5.

Figure 8 is a reference view of the state of use of the self-locking device of Figure 7 (when the spindle rotates counterclockwise).

Figure 9 is a reference view of the state of use of the self-locking device of Figure 7 (when the spindle rotates clockwise).

Figure 10 is a perspective view of a charging device for a screwdriver according to a specific embodiment of the present invention.

FIG. 11 is a perspective view showing the mounting of the screwdriver in the charging device according to the embodiment of the present invention. among them:

1-Host housing 9a-Gearbox housing 31-Fixed disc

2-handle part 10-screw 4 ratio 32-fixed pin

2a-inner cavity 11-PCB board 33-inner surface

3-Working parts 12-Controls 34-Adapter

3a-cavity 12a-forward control button 35-flat square hole

3b-insulation 12b-reverse control 36-plane

4_magnet 13_氖37 - roller

5 _ battery unit 14 - conductive spring 38 - spline teeth

6-First motor 15-resistor 40-output planet carrier

6a-first motor shaft 16-metal end cap 41-foot

6b-notch 17-wire 50-charger

7-Second motor 18-Self-locking device 51-Base

7a-second motor shaft 19-charging interface 52-support wall

7b-notch 20-electricity measuring device 52a- accommodating space 8-torsion spring 21-transparent window 53-indicator

8' - torsion spring head end 23-spindle 54-wire

8" - torsion spring end 24-flat part XI-axis

9-transmission mechanism

detailed description

Referring to FIG. 1 and FIG. 2, the portable hand tool is a screwdriver 10 comprising a vertically extending main body housing 1. The working component 3 is disposed at one end of the main body housing 1, and the opposite working part of the main body housing 1 The other end of the 3 is provided with a grip portion 2 that is gripped during operation, and the main housing 1 is provided with a control member 12 for controlling the working portion 3. The main body casing 1 has a longitudinally extending axis XI, wherein the working member 3 is disposed longitudinally with the main body casing 1. The working member of the embodiment is coaxial with the main casing 1, and may also be parallel to the main casing axis XI. Settings. The main body casing 1 can be snapped together by two Hough-type casings, or fixedly connected by screws or other fastening methods, or can be connected together by a plurality of tubular casings to form a main casing by suitable means. Body 1.

Referring further to FIG. 2, the working member 3 is located at the front of the main body casing 1, and the working member 3 is usually made of a metal material for holding or fixing a working head of various specifications and shapes (not shown). , such as a letter, cross, or star work head to meet the needs of different working conditions. The front end of the working member 3 is provided with a cavity 3a for fixing or holding the working head, and a magnet 4 is disposed at the bottom of the cavity 3a, and the arrangement of the magnet 4 facilitates positioning and mounting of the working head in the cavity 3a.

A first motor 6 and a second motor 7 that drive the operating member 3 are disposed in the main body casing 1. The first motor 6 and the second motor 7 in this embodiment are two motors having the same characteristics, and have an elongated cylindrical shape and are serially connected to the main body casing 1 along the longitudinal axis XI of the main casing 1. The motor axis of the first motor 6 and the second motor 7 are aligned with the axis XI of the main casing 1. The motor axis in this embodiment is coaxial with the axis XI of the main casing 1, and may of course be parallel. Settings. The first motor 6 and the second motor 7 are electric small motors, which output high speed and high torque. For example, a standard motor can be used. The brand is Mabuchi, model RC380, specification φ 24mm* 31mm, rated output power. 5.5w electric small motor. It is also possible to design the specific size of the motor according to the shape of the screwdriver. For example, the diameter and length of the motor can be φ 12mm*26.9mm, φ 15.4mm* 32. lmm, φ 16mm*25mm, or φ 21mm* 31mm, φ 38.5 For mm*65mm, etc., it is preferable to set the motor length to diameter ratio range from 1.2 to 2.6, and the ratio between length and diameter is preferably about 1.5. Since the small motor described above is used, the screwdriver 10 can be provided in an elongated shape. Of course, the cross-sectional dimension of the screwdriver 10 in the longitudinal extension direction thereof can be slightly changed, for example, a main casing housing the motor and the gear case. The lateral dimension of the body 1 and the handle portion 2 may not be exactly the same, but does not affect the screwdriver 10 is generally elongated; the cross section of the screwdriver 10 can be different shapes such as a circle, an ellipse, a triangle, a rectangle, etc., if the screwdriver is set to an elongated cylinder, the maximum diameter can be Φ 32 mm, φ 42 mm, etc.; the longitudinal dimension can be selected from 25 Omm, 32 Omm, 326mm, etc. In short, the ratio of the longitudinal dimension to the lateral dimension of the screwdriver 10 is set between 4.4 and 12.5, preferably at 7. Between 8 and 8, such an arrangement allows the electrician screwdriver 10 to be sized and easy to carry.

The first motor 6 is disposed adjacent to the workpiece component 3 with respect to the second motor 7. The transmission mechanism 9 is disposed between the first motor 7 and the working component 3, and the transmission mechanism 9 is received in the gearbox housing 9a in the main body housing 1. The rotation of the first motor 6a and the second motor 6b is transmitted to the working member 3 through the transmission mechanism 9. The transmission mechanism 9 in the gear case housing 9a may be provided as a primary gear reduction mechanism or a multi-stage gear reduction mechanism as needed. When the multi-stage gear reduction mechanism is provided, the output speed of the working member 3 can be adjusted by setting a control member. Of course, a torque adjustment mechanism may be provided in the gear case housing 9a for adjusting the output torque of the first motor 6 and the second motor 7. The transmission mechanism 9 can also be used with a non-gear transmission, such as a pulley drive.

A coupling is disposed between the first motor 6 and the second motor 7, and the coupling 本 in the present embodiment is a torsion spring 8. The torque output of the second motor 7 is transmitted to the first motor 6 through the coupling, and finally the total torque output of the first motor 6 and the second motor 7 is transmitted to the operating member 3 through the transmission mechanism 9. The specific operating parameters of the screwdriver 10 can be set as listed in the following table:

The handle portion 1 is located at one end of the main body casing 1 adjacent to the second motor 7. The handle portion 1 has a longitudinally extending grip portion for the operator to hold, the handle portion 1 is provided with a lumen 2a, and the inner chamber 2a is accommodated for The battery unit 5 is powered by a motor 6 and a second motor 7. The battery unit 5 in this embodiment comprises two lithium batteries in series with a nominal voltage of 3.6 volts. Of course, the number of batteries can be set according to actual needs. The battery unit 5 can be used with a rechargeable battery such as a nickel-hydrogen, nickel-cadmium, nickel-zinc, or lead-acid battery; or a disposable battery such as an alkaline dry battery. For the lithium battery solution, a lithium battery over-current and over-discharge protection PCB board with a switching circuit electrically connected to the battery unit 5, the first motor 6, and the second motor 7 is disposed on one side of the battery unit 5 in the inner chamber 2a. 11. The rotation direction of the first motor 6 and the second motor 7 is controlled by the forward rotation control knob 12a or the reverse rotation control knob 12b provided outside the handle portion 5, so that the screw can be tightened or the screw can be loosened. For other battery solutions, the first motor 6 and the second motor 7 can be controlled simply by mechanical switches. The screwdriver 10 is an electrician screwdriver, and the measuring device 20 is disposed on the other side of the battery unit 5 in the inner chamber 2a. The measuring device 20 includes a manifold 13 electrically connected through a wire 17, and a conductive spring 14 , the safety resistor 15 , the metal end cover 16 , wherein the metal end cover 16 is disposed at the tail end of the handle portion 2 . A transparent window 21 is provided on the handle portion 2 corresponding to the manifold 13, so that the operator can observe the lighting state of the manifold 13 to determine whether the working object is charged. Of course, the housing of the handle portion 2 can be made of a transparent material. Those skilled in the art can envisage that the indicating component in the measuring device for indicating the voltage of the detecting area can also be replaced by an acoustic or optical alarm, or LED, LCD, digital voltage, current display or the like.

Portable screwdriver 10 Since the measuring device 20 is provided, the operator can detect whether the workpiece or the surface of the housing is charged before screwing. When the power measuring device 20 is used, the operator holds the handle portion 2 and puts the thumb on the metal end cover 16, so that when the working member 3 with the working head touches the charged body, the voltage on the charged body passes through the working head. And the working part (metal body), the safety resistor 15, the manifold 13, the conductive spring 14 and the metal end 16 of the tail end of the handle part 2 are connected to the earth to form a loop. If the voltage between the workpiece or the surface of the housing and the ground exceeds 60 volts, the manifold in the measuring device 20 will illuminate, indicating that the workpiece or the surface of the housing is electrically charged.

Since the electrician screwdriver requires live working at 120V or 230V AC, it is required that the screwdriver 10 be able to withstand 1500V high voltage. Considering the safety of the operator, the main unit housing 1 that the operator can access and the handle portion for holding 2 It is preferred to use insulating materials such as rubber, plastic and other insulating materials. The working member 3 has a certain length extending in the longitudinal direction, so that an insulating layer 3b is provided on an outer surface of a portion thereof protruding from the main body casing 1, for example, a plastic sleeve or other insulating material which can be sleeved on the outer peripheral surface of the working member 3. . The first motor 6 and the second motor 7 in this embodiment are double insulated motors, that is, the motor shaft is provided with an insulating material, which functions to separate the strong electric power from the rear handle portion 2 and the human body to ensure the safety of operation. The double insulated motor is different from the ordinary DC motor, and the ordinary DC motor only sets the basic insulation. The transmission mechanism 9 uses all-plastic planetary gear teeth, and the gear box housing 9a uses a plastic housing. This arrangement not only protects the operator's safety, but also helps to reduce the weight of the screwdriver 10 and reduce the cost.

Referring to FIGS. 3 and 4, the first motor 6 is provided with a first motor shaft 6a on the side close to the second motor 7, and the second motor 7 is provided with a second motor shaft 7a on the side close to the first motor 6, A gap is provided between the first motor shaft 6a and the second motor shaft 7a. The central portions of the first motor shaft 6a and the second motor shaft 7a are respectively provided with notches 6b, 7b, and the slots 6b, 7b are respectively connected from the connecting end of the motor shaft in the longitudinal direction of the first motor shaft 6a and the second motor shaft 7a. The free end extends a certain length, and the torsion spring end 8' is bent and then snapped into the notch 6b, and the torsion spring end 8" is bent and then snapped into the slot 7b. The torsion spring 8 is disposed on the first motor shaft 6a. Between the second motor shaft 7a and the second motor shaft 7a, the first motor 6 and the second motor 7 can be kept coaxial and can maintain the same phase. The torsion spring 8 can control or suppress the generation of the first motor 6 and the second. The impact between the motors 7 can eliminate some of the eccentricity that can exist between the first motor 6 and the second motor 7. Of course, the torsion spring 8 in this embodiment can also be replaced with a flexible shaft or other flexible connecting member.

Referring to Figures 5, 6, and 7, the planetary gear train of the transmission mechanism 9 includes an output planet carrier 40. The screwdriver 10 is provided with a self-locking device 18, and the self-locking device 18 includes a fixed disk 31. A plurality of fixing pins 32 are uniformly disposed outside the circumference of the fixed disk 31, and the fixed pins 32 and the gear case 9 a is tightly coupled so that the fixed disk 32 is in a stationary state with respect to the main casing 1 and the gear case 9a, and an inner circular surface 33 is formed on the inner side of the circumference of the fixed disk 31. In the range of the inner circular surface 33, an adapter disk 34 is provided, and a flat hole 35 is formed in the center portion of the adapter disk 34. The main shaft 23 is connected to the working part 3, and the other end is provided as a flat portion 24, and the interposer 34 and the main shaft 23 are integrally connected by the flat hole 35 and the flat portion 24, so that the main shaft 23 can be rotated. The connection method used therein can be replaced by a spline and other connection means which are easily conceivable by those skilled in the art. The self-locking device 1 8 further includes a plurality of legs 41 projecting from the output end carrier 40 toward the working member 3, and the legs 41 are fixedly disposed on the output planet carrier 40.

A plurality of planes 36 are formed on the outer circumference of the adapter disk 34, and a connecting portion is disposed on one end of the adapter disk 34 adjacent to the output end carrier 10, the connecting portion is provided with spline teeth 38, and the adapter disk 34 is passed through the spline teeth. 38 loosely mates with the output planet carrier 10. Between the fixed disk 31 and the adapter disk 34, a more specific position is that a roller 37 is disposed between the inner circular surface 33 of the fixed disk 31 and the plane 36 of the adapter disk 34, and the roller 37 abuts against the inner circular surface 33. And plane 36, and can scroll at the location. Further, a leg 41 of the output end carrier 40 is inserted between each of the rollers 37, that is, the leg 41 is disposed between the inner circular surface 33 of the fixed disk 31 and the outer circular surface of the adapter disk 34. The leg 41 and the inner circular surface 33 of the fixed disk 31 and the adapter disk 34 are both in a clearance fit, so that the leg 41 can be rotated in the position.

With further reference to FIG. 8, when the control member 12 is triggered, taking the rotational output of the motor as an example, the rotational torque generated by the first motor 6 and the second motor 7 is transmitted to the output end carrier 40, and the output end carrier 10 is rotated relative to the adapter disk 34 mated with its spline, and the output planet carrier leg 41 is rotated in the corresponding direction with the output planet carrier 40. Wherein, when the leg 41 rotates for a slight displacement, it abuts against the roller 37, since the roller 37 is a small end of the face formed from the inner circular surface 33 and the plane 36 of the adapter disk 34. The big end is moved, so the roller 37 can be pushed by the output planet carrier foot 41, following the output end of the planet carrier 40, until the output end carrier 40 is in contact with the side of the spline teeth 38 of the adapter disc 34. The planet carrier legs 41 and the rollers 37 rotate the adapter disk 34 together. Thus, the rotational torque of the first motor 6 and the second motor 7 is transmitted to the spindle 23 fixedly coupled to the adapter disk 34, and further transmitted to the working member 3.

With further reference to FIG. 9, when the control member 12 is turned off, the first motor 6 and the second motor 7 stop rotating. No rotary torque output. If the operator still twists the working head housed in the workpiece member 3 in a clockwise direction, it will be manifested that the spindle 23 will rotate in the corresponding direction. Since the spindle 23 and the adapter disk 34 are integrated by a flat connection, the adapter disk 34 will also rotate in the corresponding direction with the spindle 23. The roller 37 is rolled from the first position indicated by the broken line to the second position indicated by the solid line, since the roller 37 is formed from the inner surface 32 and the plane 36 of the adapter disk 34. The large end moves toward the small end. At this time, the flat surface 36 of the fixed disk 31, the inner circular surface 33, and the plane 36 of the adapter disk 34 are tightened with each other, and the main shaft 23 cannot drive the output end carrier bracket 41 to rotate. That is, the spindle 23 is automatically locked. Due to the arrangement of the self-locking structure 18, the operator can choose to manually rotate the screw 10 to tighten the screw. It is especially suitable when the screwdriver is screwed to the basic position in the electric mode, the motor 6, 7 can be stopped by the control member 12, and in the manual mode, the screwdriver 10 is rotated to screw the screw in place, thereby avoiding The screw is over-screwed in the electric mode and causes the screw to slip. The screwdriver 10 is not only an electrician screwdriver, but also a hand and electric screwdriver. It is easy to operate and easy to carry.

In addition to electrician screwdrivers, the technical solution of the present invention is also applicable to other portable hand tools, such as hand-held electric oscillating machines, hand-held electric sanders, hand-held electric scissors, and the like, all of which fall within the scope of the present invention.

Referring to FIG. 10 and FIG. 11 , the charging device 50 electrically coupled to the screwdriver 10 includes a base 51 and a support wall 52 above the base 51 , wherein the base 51 is provided with a charging interface (not shown). And a wire 54 connected to the alternating current power source, the support wall 52 is provided in a semi-closed hollow cylindrical shape. Of course, it can also be arranged to receive other shapes of the screwdriver 10 inserted. Due to the slim body of the screwdriver 10, when the charging is required, the handle portion 3 of the screwdriver 10 can be inserted into the receiving portion 52a of the supporting wall 52, and the charging interface and the screw in the base 51 at this time. The batch charging interface 19 (refer to FIG. 2) automatically establishes an electrical connection, and the charging device 50 can charge the battery unit 5 of the screwdriver 10. Two indicators 53 are provided on the base 51 for indicating that the electrical connection of the charging device 50 to the screwdriver 10 has been established, and that the battery is fully charged. The color when the indicator light is on is indicated by red or green. Of course, other colors can also be used. For example, you can also set the battery fill indicator to light up when charging, and automatically turn off when fully charged. Or it is a red light when charging, and a green light when it is full. The screw set 10 and the charging device 50 are arranged such that the screwdriver 10 is inserted into the accommodating portion 52a of the charging device 50 after being used up, not only can the screwdriver 10 be charged in time, but also the screw. The batch 10 collection provides a containment space, and the operator does not need an additional toolbox to store it, and it can be taken out at the time of use, which is very convenient.

Claims

Claim

An electrician screwdriver, comprising: a main body casing, a power measuring device disposed on the main body casing, and a working component disposed at one end of the main body casing, wherein: the main casing is provided with a motor, and a motor unit for driving a driving force, wherein the main body housing is provided with a control member for controlling the motor, and when the control unit controls the operation of the motor, the electrician screwdriver is in an electric mode, when the control unit controls the motor to be inoperative, The electrician screwdriver is in manual mode.

2. The electrician screwdriver according to claim 1, wherein: the outer periphery of the working member is provided with an insulating material.

3. The electrician screwdriver according to claim 1, wherein the motor is a double insulated motor, and an insulating material is disposed on a motor shaft of the motor.

4. The electrician screwdriver of claim 1 wherein: said electrical measuring device includes an indicator member for indicating whether or not the detection region is energized.

The electrician screwdriver according to claim 1, wherein a transmission mechanism for transmitting power of the motor to the working member is provided between the motor and the working member.

6. The electrician screwdriver of claim 5 wherein: said transmission mechanism comprises a full plastic gear mechanism.

7. The electrician screwdriver according to claim 5, wherein: the main body housing is provided with a gear case housing, and the transmission mechanism is disposed in the gear box housing, and the gear box housing is made of a plastic material.

8. The electrician screwdriver according to claim 1, wherein: the working member is coupled to the main shaft, and a self-locking device for locking the main shaft is disposed between the main shaft and the motor.

9. The electrician screwdriver according to claim 8, wherein: a transmission mechanism is disposed between the motor and the working component, the transmission mechanism includes an output end carrier, and the self-locking device includes a fixed relative to the main shaft. And a fixed disk fixed relative to the main body casing, the fixed disk is provided with an inner circular surface, the adapter disk is disposed within a range of the inner circular surface, and the outer periphery of the adapter disk has a plurality of planes, the adapter disk is provided with a connecting portion connected to the output planet carrier, and the output end row frame includes a plurality of legs extending between the plane and the inner circular surface, wherein the adjacent legs are respectively Set up with rollers.

10. The electrician screwdriver of claim 1 wherein: said main housing has a longitudinally extending main housing axis, said battery unit having an axis that coincides or is parallel with said main housing axis.

1 1. The electrician screwdriver according to claim 1, wherein: a ratio of a longitudinal dimension to a lateral dimension of the main casing is set between 4. 4 and 1.5.

2. The electrician screwdriver according to claim 11, wherein: the longitudinal ruler of the main body casing The inch setting range is between 200mm and 350mm.

13. The electrician screwdriver according to claim 11, wherein: the main casing has a lateral dimension ranging between 28 mm and 45 mm.

14. The electrician screwdriver of claim 1 wherein: said motor comprises at least two electric motors connected in series.

15. The electrician screwdriver according to claim 14, wherein: said two electric motors have the same characteristics, and said two electric motors have the same diameter.

16. The electrician screwdriver according to claim 14, wherein: said electric motor is an elongated cylindrical motor, and said electric motor has a length to diameter ratio set between 1.2 and 2.6.

17. The electrician screwdriver according to claim 14, wherein a coupling is disposed between the two electric motors.

18. An electrician screwdriver according to claim 17, wherein the coupling is provided as a torsion spring.

19. A portable hand tool, comprising: a main body housing, a working component disposed at one end of the main body casing, a power device for driving the working portion, and a battery unit for supplying power to the power device, The utility model is characterized in that: the power device comprises at least two electric motors, and the electric motor is serially connected in the main body casing.

20. A portable hand tool comprising: a main body housing, a working component disposed at one end of the main body housing, a motor for driving the working portion, and a battery unit for powering the motor, wherein the main body housing is characterized by The ratio between the longitudinal dimension and the lateral dimension of the portable hand tool is set between 4.4 and 12.5.