CN118024172A - Impact tool and electric tool - Google Patents

Abstract

The application discloses an impact tool and an electric tool, comprising: a motor; the output mechanism comprises an output shaft for outputting power outwards; the impact mechanism is used for applying impact force to the output shaft; a housing including a first housing extending substantially along a first axis, the first housing at least a portion of the motor; the first cover body is arranged at one end of the first shell, which is far away from the output mechanism, and a first bearing seat is formed or connected with the inner side surface of the first cover body and is used for supporting a bearing of one end of the driving shaft, which is far away from the output mechanism; the display mechanism comprises a man-machine interaction assembly and a holding assembly, wherein the man-machine interaction assembly is configured to be operated and can output information; the holding component is used for supporting the man-machine interaction component; the retaining assembly is arranged outside the first cover body. By adopting the scheme, the adaptive electric tool with the modularized structure is beneficial to platformness.

Description

Impact tool and electric tool

Technical Field

The present application relates to an electric tool, and more particularly, to an impact tool.

Background

An impact tool is a tool capable of outputting a rotational motion having an impact frequency, including but not limited to an impact wrench, an impact screwdriver. Such as impact wrenches for screwing bolts, nuts, impact screwdrivers typically unscrew or tighten screws, etc. In order to achieve a rotational movement with a certain impact frequency, the impact tool therefore needs to comprise an output member for outputting a rotational force, and also needs to comprise an impact mechanism for periodically impacting the output assembly.

The impact mechanism comprises an impact block, an anvil matched with the impact block and a main shaft connected to the motor. When the condition for starting the impact mechanism is reached, the impact block is periodically engaged with the anvil to output an impact force in the rotational direction.

In the related art, when a component having a man-machine interaction function is provided, an impact type tool basically adopts a structure integrated inside a housing, for example, mounted on a power supply mounting portion of the tool near a power supply device.

Disclosure of Invention

The application aims to provide an impact tool and an electric tool, which are flexibly adapted and provided with a man-machine interaction function.

In order to achieve the above object, the present application adopts the following technical scheme:

an impact tool, comprising: a motor including a drive shaft rotating about a first axis; the output mechanism comprises an output shaft for outputting power outwards; the impact mechanism is used for applying impact force to the output shaft; a housing including a first housing extending substantially along a first axis, the first housing at least a portion of the motor; the first cover body is arranged at one end of the first shell, which is far away from the output mechanism, and a first bearing seat is formed or connected with the inner side surface of the first cover body and is used for supporting a bearing of one end of the driving shaft, which is far away from the output mechanism; the display mechanism comprises a man-machine interaction assembly and a holding assembly, wherein the man-machine interaction assembly is configured to be operated and can output information; the holding component is used for supporting the man-machine interaction component; the retaining assembly is arranged outside the first cover body.

In some embodiments, the display mechanism is disposed at a rear end of the first cover along the first axis direction.

In some embodiments, when the maximum output torque of the impact tool is 850n·m or more, an axial length L from the front end of the housing to the rear end of the display mechanism is 175mm or less in the first axis direction.

In some embodiments, when the maximum output torque of the impact tool is equal to or greater than 200n·m and less than 850n·m, an axial length from a front end of the housing to a rear end of the display mechanism is equal to or less than 160mm in the first axis direction.

In some embodiments, the human-machine interaction component comprises: a display for being operated and/or displayed; and the second controller is used for controlling the display, is provided with a second control unit, is electrically connected with the first controller used for controlling the motor, and is provided with a first control unit.

In some embodiments, the retention assembly comprises: the second cover body is provided with a first accommodating part, and the display is arranged in the first accommodating part; the second cover body is formed with a display part for showing the display content of the display; and a fixing part, which is provided with an opening part adapted to the display area of the display, and a first connecting part is formed or connected at the periphery of the opening part, and the first connecting part tightly connects the display with the second controller.

In some embodiments, the display is located between the fixed portion and the second controller, and the first connecting portion is in interference fit with at least two sides of the second controller.

In some embodiments, the human-machine interaction assembly further comprises: and the TYPE-C interface is arranged on the second cover body and is provided with a channel for installing the TYPE-C interface, and the channel is of an integrated structure.

In some embodiments, a sealing cover is provided on the channel of the TYPE-C interface, the sealing cover including a first state covering the TYPE-C interface and a second state exposing the TYPE-C interface, the sealing cover being connected to the second cover when in the first state and the second state.

A power tool, comprising: a motor including a drive shaft rotating about a first axis; the output mechanism comprises an output shaft for outputting power outwards; a housing including a first housing extending substantially along a first axis, the first housing at least a portion of the motor; the first cover body is arranged at one end of the first shell far away from the output mechanism, a first bearing seat is formed or connected to the inner side surface of the first cover body, and the first bearing seat is used for supporting a bearing of one end of the driving shaft far away from the output mechanism; a second cover body formed with a receiving portion; the second cover body is connected to the outer side of the first cover body and/or the first shell.

The application provides an impact tool and an electric tool, wherein a relatively independent modularized display mechanism is directly arranged on a relatively complete electric tool. The modular structure of the double-layer or multi-layer rear cover is used, so that the adaptation between the platform products is facilitated. By using the split design of the first cover and the first shell, a universal display mechanism can be used between products with different specifications by only modifying the design of the first cover. The flexible adaptation of the product components among the same platform is realized, and the adaptation and the product upgrading among different platforms can be realized through the minimum cost investment.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present application;

FIG. 2 is a schematic diagram of a cross-sectional view of the embodiment of FIG. 1;

FIG. 3 is an exploded view of the impact mechanism of the embodiment of FIG. 1;

FIG. 4 is a schematic view of the impact mechanism of the embodiment of FIG. 1 with the impact block in a first position;

FIG. 5 is a schematic view of the impact mechanism of the embodiment of FIG. 1 with the impact block in a second position;

FIG. 6 is an exploded view of the structure of the housing and display mechanism of the embodiment of FIG. 1;

FIG. 7 is a schematic view of the other view of FIG. 6, wherein the grip is omitted;

FIG. 8 is a schematic view of the mechanism shown in FIG. 7;

FIG. 9 is an exploded view of the structure of the mechanism shown in FIG. 6;

FIG. 10 is a schematic view of the second cover of FIG. 9 from another perspective, showing primarily the inside of the second cover, with the seal cover in a second state;

FIG. 11 is an exploded view of the structure of the display mechanism when the holding assembly of the present application is provided with the second receiving portion;

fig. 12 is a schematic structural view of a display module formed by the fixing part, the display and the second controller;

FIG. 13 is a schematic view of the other view of FIG. 12 with the keys removed;

FIG. 14 is an exploded view of the structure from another perspective of FIG. 12;

FIG. 15 is a schematic view of the structure of the second cap and the sealing cap;

FIG. 16 is a schematic view of the structure of FIG. 15 from another perspective;

FIG. 17 is another schematic view of a display component, wherein a display interface of the display is primarily shown;

FIG. 18 is a schematic diagram of a control mechanism of the present application;

Fig. 19 is a flow chart of a method of controlling a status indicator lamp in the present application.

Detailed Description

The application is described in detail below with reference to the drawings and the specific embodiments.

In the description of the present application, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.

In the present application, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

The application is described in detail below with reference to the drawings and the specific embodiments.

For clarity of description of the technical solution of the present application, upper, lower, left, right, front and rear sides are also defined as shown in fig. 1 and 2.

Fig. 1 and 2 show an impact wrench 100 according to a first embodiment of the present application, including a power supply device 30. Wherein the power supply device 30 is used for providing electric power for the impact wrench 100. In this embodiment, the power supply device 30 is a battery pack that cooperates with a corresponding power circuit to power corresponding components within the impact wrench 100. It should be understood by those skilled in the art that the power supply device 30 is not limited to the use of a battery pack, and may also be implemented to supply power to corresponding components in the machine by using a commercial power source, an ac power source, and corresponding rectifying, filtering and voltage regulating circuits.

As shown in fig. 1 to 7, the impact wrench 100 includes a housing 11, a motor 12, an output mechanism 13, a transmission mechanism 14, and an impact mechanism 15. Wherein the motor 12 comprises a drive shaft 121 rotating about a first axis 101. In the present embodiment, the motor 12 is specifically provided as the motor 12, and hereinafter, the motor 12 is replaced with the motor 12, and the drive shaft 121 is replaced with the motor shaft 121, but this is not a limitation of the present application.

The output mechanism 13 includes an output shaft 131 for connecting and driving the work attachment in rotation. The front end of the output shaft 131 is provided with a clamping component 132 which can clamp corresponding working accessories, such as screwdrivers, drills, wrenches and the like, when different functions are realized.

The output shaft 131 is configured to output power, and the output shaft 131 rotates with the output axis, which is the second axis 102 in this embodiment. In this embodiment, the first axis 101 coincides with the second axis 102. In other alternative embodiments, the second axis 102 is disposed at an angle to the first axis 101. In other alternative embodiments, the first axis 101 and the second axis 102 are disposed parallel to each other but not coincident.

As shown in fig. 3 to 5, the impact mechanism 15 is used to provide an impact force to the output shaft 131. The impact mechanism 15 includes a main shaft 151, an impact block 152 fitted around the outer periphery of the main shaft 151, an anvil 153 provided at the front end of the impact block 152, and an elastic member 154. Wherein an anvil 153 is coupled to the output shaft 131. In the present embodiment, the anvil 153 includes an anvil 1531, and the output shaft 131 is formed at a front end of the anvil 1531. It will be appreciated that the anvil 1531 and the output shaft 131 may be integrally formed or separate pieces formed separately. The impact block 152 is driven by the main shaft 151, and the anvil 153 is engaged with and struck by the impact block 152.

The impact block 152 includes an impact block body and a pair of first end teeth 1521 radially symmetrically protruding from a front end surface of the impact block body. The anvil is provided with a pair of second end teeth 1532 radially symmetrically projecting on the rear face opposite the impact block.

The impact block 152 is supported on the main shaft 151 to rotate integrally with the main shaft 151 and is reciprocally slidable with respect to the main shaft 151 in the axial direction of the main shaft. In this embodiment, the axis of the main shaft coincides with the axis of the motor shaft. Thus, the impact block 152 reciprocally slides and rotates relative to the main shaft 151 in the direction of the first axis 101. In other alternative embodiments, the axis of the spindle may be parallel to, but not coincident with, the axis of the motor shaft.

The resilient member 154 provides a force to the impact block 152 that brings it closer to the anvil 153. In the present embodiment, the elastic member 154 is a coil spring.

The impact block 152 is also provided with a pair of first ball grooves 1522 which open frontward and extend rearward in the front-rear direction on the front end surface. The outer surface of the main shaft 151 is also formed with a pair of V-shaped second ball grooves. The first ball groove 1522 and the second ball groove 1511 have groove bottoms each of which is semicircular. The impact mechanism 15 also includes a ball 155. The ball 155 spans the first ball groove 1522 and the second ball groove 1511, thereby coupling the impact block 152 with the spindle 151. In this embodiment, the ball 155 is a steel ball. Since the impact block 152 and the spindle 151 are respectively provided with the V-shaped grooves which are concave inwards to form a ball channel together, the rolling ball 155 is arranged between the impact block 152 and the spindle 151 and is embedded into the ball channel, so that the spindle 151 can drive the impact block 152 to rotate through the rolling ball 155, and the impact block 152 drives the anvil to rotate through the cooperation of the anvil 153 to further drive the output shaft 131 to rotate.

During operation of the impact wrench 100, as shown in fig. 4-5, the impact block 152 includes a first position that moves forward to the most distal end and a second position that moves rearward to the most distal end. In the first position, the first end teeth 1521 of the impact block 152 are engaged with the anvil 153, i.e., the forward end of travel of the impact block 152 is stopped by the anvil 153.

When the impact wrench is empty, the impact mechanism does not impact, and the impact mechanism plays a role in transmission and transmits the rotation of the motor to the output shaft. When the impact tool is loaded, the rotation of the output shaft is blocked, and the rotation of the output shaft may be completely stopped due to the reduction of the rotation speed of the output shaft due to the different sizes of the loads. When the output shaft stops rotating completely, the anvil also stops rotating. The impact block also stops rotating due to the limited action of the anvil on the impact block in the circumferential direction, but the spindle continues to rotate, so that the ball is extruded to move along the ball path, and the impact block is driven to displace backwards along the axis of the spindle, namely to move towards the second position of the impact block, as shown in fig. 5. And simultaneously compressing the resilient member until the anvil is completely disengaged from the impact block, the impact block being in the second position. At this time, the main shaft drives the impact block to rotate at a certain rotation speed, and the elastic element rebounds axially, i.e. moves towards the first position of the impact block, as shown in fig. 4. At this time, the relative rotation speed between the impact block and the anvil is the rotation speed of the impact block, and when the impact block rotates to contact with the anvil, an impact force is applied to the anvil, and at this time, the impact block is at the first position. Under the action of the impact force, the output shaft continuously rotates for a certain angle against the load, then the output shaft stops rotating again, and the process is repeated.

As shown in fig. 2 to 5, a transmission mechanism 14 is provided between the motor 12 and the impact mechanism 15 for effecting transmission of power between the motor shaft 121 and the spindle 151. In this embodiment, the transmission 14 employs planetary gear reduction. Since the principle of operation of planetary gear reduction and the reduction produced by such a transmission are well known to those skilled in the art, a detailed description is omitted here for the sake of brevity.

As shown in fig. 1 to 2 and 6 to 7, the housing 11 includes a first case 111 and a first cover 112. The length direction of the first housing 111 extends substantially along the first axis 101. The housing 11 is also formed or connected with a grip 113 for user operation. The holding portion 113 and the first housing 111 form a T-shaped or L-shaped structure, which is convenient for a user to hold and operate. One end of the grip portion 113 is connected to the power supply device 30. When the power supply device 30 is a battery pack, the battery pack is detachably connected to the grip portion 113.

Wherein the first housing 111 at least partially houses the motor 12. The first cover 112 is mounted to an end of the first housing 111 remote from the output mechanism 13. In the present embodiment, the first cover 112 is mounted at the rear end of the first housing 111. It is understood that the first housing 111 is substantially cylindrical, and the rear end of the first housing 111 forms an opening. The first cover 112 extends along a radial direction of the first axis 101 to cover an opening at a rear end of the first housing 111. The first cover 112 includes an inner side 112a and an outer side 112b. It will be appreciated that the inner side 112a of the first cover 112 is the side opposite to the opening near the first housing 111. The inner side 112a of the first cover 112 is formed with or connected to a first bearing housing 114. The first bearing housing 114 is for supporting a first bearing 123. Since the first cover 112 is mounted to the rear end of the first housing 111, the first bearing 123 is a rear bearing of the motor 12 for supporting the rotational movement of the rear end of the motor shaft 121. The impact tool further comprises a display mechanism 16, the display mechanism 16 comprising a human-machine interaction component 17 and a holding component 18, the human-machine interaction component 17 being configured for operation and capable of outputting information. The holding assembly 18 is used for supporting the human-machine interaction assembly 17. The retaining assembly 18 is disposed on the outside 112b of the first cover. It will be appreciated that the outer side 112b of the first cover is the outer periphery of the first cover. In other alternative embodiments, the first cover may be disposed outside the first housing, or outside the junction between the first housing and the first cover. In the present embodiment, the display mechanism 16 is provided at the rear end of the first cover 112 in the direction of the first axis 101.

The display mechanism 16 is formed into a modular assembly structure that is relatively independent in structure using the retaining assembly 18 to support the human interaction assembly 17. The retaining assembly 18 is then mounted outside the first cover 112, with the first housing 111 and the first cover 112 being used to maintain the integrity of the impact tool assembly. That is, the relatively independent modular display mechanism 16 is mounted directly on the relatively complete impact tool. The modular structure of the double-layer or multi-layer rear cover is used, so that the adaptation between the platform products is facilitated. On the other hand, by using a split design of the first cover 112 and the first housing 111, the general display mechanism 16 can be used between products of different specifications by modifying only the design of the first cover 112. The flexible adaptation of the product components among the same platform is realized, and the adaptation and the product upgrading among different platforms can be realized through the minimum cost investment.

It will be appreciated that when a relatively horizontal surface is provided on the first housing 111 or a curved screen is used, the display mechanism may be provided on the outside of the first housing 111. The modular structure can be achieved as well, which is beneficial to the adaptation between the platform products. Of course, the display mechanism is arranged at the rear end, which is more beneficial to the operation and the viewing of operators.

In some embodiments, for example, in other types of power tools, particularly rotary output type power tools. When other functional components need to be added, for example, additional components of other hosts such as a lighting element and a detection function, a second cover body with a containing part is arranged and corresponds to a holding assembly. Wherein other functional components are not limited thereto, which is not a limitation of the spirit of the present application. The housing support of the second cover 181 requires additional functional components. The function of flexibly adapting the product components by the modular design can be achieved.

As shown in fig. 6 to 7, the first housing 111 is an integrally formed cylindrical housing. That is, the accommodation space inside the first housing 111 approximates a cylinder. In this embodiment, the housing 11 further includes an output housing 115. The output housing 115 serves to support the output shaft 131, and the output shaft 131 protrudes from the output housing 115 out of the casing 11. The front end of the first housing 111 is formed with a second opening, and the output housing 115 is connected to the second opening, that is, the output housing 115 is connected to the front end of the first housing 111. In this embodiment, the output housing 115 is also an integrally formed part. In the present embodiment, when the output housing 115 is connected to the first housing 111, the connection is made by an additional fastening member.

In some embodiments, a threaded connection is employed between the first housing and the output housing. That is, the portion of the output housing extending into the first housing is formed with external threads, the portion of the first housing contacting the output housing is formed with internal threads, and when the output housing is screwed into the first housing, the external threads of the output housing are engaged with the internal threads of the barrel to form a threaded connection. Because the fastening part is connected, the additional space is reserved for the fastening part, the radial size of the shell is increased, compared with the fastening part, the threaded connection does not need to protrude to occupy the additional radial space, the radial size of the shell is reduced, the impact tool can be applied to a narrower space, and the use experience of a user is improved.

In other alternative embodiments, the output housing is formed in the first housing, that is, the output housing forms one piece with the first housing. The output shell and the first shell are divided into two or more clamshell structures in the left-right or up-down direction, and a basically cylindrical structure is formed by connecting the clamshell structures.

As known in the related art, the motor 12 employed in the electric power tool includes a rotor and a stator, and can be divided into an inner rotor motor and an outer rotor motor according to the rotor position. In this embodiment, the motor 12 is an inner rotor motor. In other alternative embodiments, an external rotor motor may also be used. A motor shaft 121 is formed or attached to the rotor. The output power of the motor shaft 121 extends out of the rotor and stator. Wherein, the rear end of the motor shaft 121 is connected with a fan for heat dissipation and supports the rotational movement thereof through a first bearing 123.

The first cover 112 includes a first cover bottom 1121 having a plate shape extending radially along the first axis 101 and a first outer edge 1122 on the outer periphery of the first cover bottom 1121. Wherein the first outer edge 1122 extends along the first axis 101. The first bearing housing 114 is disposed on the first cover bottom 1121. The first bearing housing 114 has a bearing mounting hole provided therein. From the viewpoint of the capability of product mold manufacturing, the first cover 112 provided with the first bearing housing 114 is reinstalled as a separate component at the rear end of the first housing 111, so that the bearing mounting hole may extend partially into the first cover bottom 1121 in the direction of the first axis 101. And thus the axial distance of the first bearing 123 to the motor 12 can be reduced. So that the axial length of the housing 11 is reduced.

In the present embodiment, as illustrated in fig. 2, the display mechanism 16 is provided to the rear end of the first cover 112 in the direction of the first axis 101. As the axial length of the housing 11 decreases. And the axial length L from the front end of the housing 11 to the rear end of the display mechanism 16 decreases. Impact wrench 100 for different platforms, i.e. different output torques. When the maximum output torque of the impact tool is 850 N.m or more, the axial length L from the front end of the housing 11 to the rear end of the display mechanism 16 is 175mm or less along the first axis 101. In some embodiments, the axial length L from the front end of the housing 11 to the rear end of the display mechanism 16 is 170mm or less. When the maximum output torque of the impact tool is not less than 850 N.m and not less than 200 N.m, the axial length L from the front end of the housing 11 to the rear end of the display mechanism 16 is not more than 160mm in the direction of the first axis 101.

The display mechanism 16 is described in detail below.

As shown in fig. 7 to 17, the human-machine interaction assembly 17 includes a display 171 and a second controller 192. Wherein the display 171 is for being operated and/or displayed. In the present embodiment, the display 171 is used for displaying, that is, the display 171 is used for feedback, that is, information prompt, to the user. The display 171 may be, for example, a Liquid Crystal Display (LCD), a Light Emitting Diode (LED) display, including an Organic Light Emitting Diode (OLED) display, or an organic Electroluminescent (EL) display. The second controller 192 is for controlling the display 171. The second controller 192 is provided with a second control unit. As shown in fig. 2, the second controller 192 is electrically connected to the first controller 191 for controlling the motor 12, and the first controller 191 is provided with a first control unit. As further shown in fig. 7 to 17, in the present embodiment, the human-computer interaction component 17 further includes an input section 172 for setting by the user. The input portion 172 may be buttons, a keypad, a spin/dial knob, or the like. The second controller 192 is also used to receive and control the input 172. In the present embodiment, the input portion 172 is provided or connected to the second controller 192. The input portion 172 is disposed below the display 171.

In this embodiment, the second controller 192 is a control circuit board including a PCB circuit board (Printed Circuit Board) and an FPC circuit board (Flexible Printed Circuit board). The first controller 191 is also a control circuit board including a PCB circuit board (Printed Circuit Board) and an FPC circuit board (Flexible Printed Circuit board). The first control unit and the second control unit adopt special control chips, such as a singlechip and a micro control module MCU (Microcontroller Unit).

In other alternative embodiments, the display is configured as a touch pad so that the display and input are integrated. In other alternative embodiments, the input may be replaced with an external device, such as a smart phone, tablet computer, notebook computer, or the like.

In this embodiment, the man-machine interaction assembly 17 further comprises a status indicator 173 for indicating the working status of the impact tool. The status indicator 173 is disposed or connected to the second controller 192. A status indicator 173 is disposed above the display 171. Wherein the status indicator 173 comprises, for example, a Light Emitting Diode (LED). In other alternative embodiments, the human-machine interaction assembly 17 further comprises an audible indicator for indicating the working state of the impact tool. Wherein the audible prompts comprise e.g. a buzzer. It will be appreciated that the status indicator 173 and the audio prompter as status prompting means may be provided on the display 171 in combination.

As shown in fig. 9 to 10, the holding assembly 18 includes: a second cover 181 and a fixing portion 182. The second cover 181 has a first receiving portion 1811. The fixing portion 182 is used to form an integral part of the display 171 and the second controller 192. The first receiving portion 1811 is configured to receive the integral component. As shown in fig. 12 to 14, for convenience of reference, the fixing portion 182, the display 171 and the second controller 192 constitute an integral component called a display module. During use, the applicant has found that the impact tool, when in operation, can cause the vibration of the whole machine to be greater than that of other non-impact rotary output tools due to the output of impact force. This increases the requirements for anti-vibration performance of the display module.

As shown in fig. 12 to 14, in the present embodiment, the display 171 is provided at the rear end of the second controller 192. That is, the back surface of the display 171 is connected to the second controller 192, and the back surface of the display 171 is a non-display surface. Wherein the back of the display 171 is fixedly connected to the second controller 192. In this embodiment, a cushion pad is disposed between the back surface of the display 171 and the second controller 192, and an FPC is disposed on the side surface of the display 171 and connected to the second controller 192. The side of the display 171 is encapsulated or sealed with the second controller 192.

The fixing portion 182 is integrally formed as a frame structure. The fixing portion 182 includes: an opening 1821 and a first connection 1822. The opening 1821 corresponds to a display area of the display 171. A first connection portion 1822 is formed or connected to a peripheral side of the opening portion 1821. The first connection portion 1822 tightly connects the display 171 with the second controller 192. In this embodiment, the display 171 is located between the fixing portion 182 and the second controller 192, and the first connecting portion 1822 is in interference fit with at least two sides of the second controller 192. The display 171 and the second controller 192 are both located in the frame structure formed by the fixing portion 182. The first connection part 1822 includes four parts, which protrude from four corners of the display 171 toward the front side of the second controller 192 along the axis line, respectively. It is understood that the number of the first connection portions 1822 is not limited to four. The first connection portion 1822 is provided with a hook portion 1823. The hook portion 1823 is engaged with the front sides of the two sides of the second controller 192, that is, the back surface of the connection surface between the second controller 192 and the display 171. The first connecting portion 1822 has an elastic deformation amount, so the fixing portion 182 is pressed against the display surface of the display 171 by the interference fit between the first connecting portion 1822 and the second controller 192. In this example, the interference is 0.1mm. It is achieved that in case of vibrations, the display surface and the non-display surface of the display 171 are not displaced relative to each other. On the other hand, the components in the whole display module cannot relatively shift under the vibration condition.

As shown in fig. 9 to 10, the display module is accommodated in the first accommodating portion 1811. In this embodiment, a connection hole is provided in the second controller, and the display module is integrally connected in the second cover 181 by a fastener 185. A display portion 1812 for displaying the display content of the display 171 is formed on the second cover 181. The display portion 1812 is provided in the area of the first receiving portion 1811. In the present embodiment, the second cover 181 includes a first main body portion 181a, a protective sheath 181b, and a second connection portion 181c. The first body portion 181a has a cover-like structure as a whole. A first receiving portion 1811 is formed inside the first body portion 181 a. The first receiving portion 1811 is formed in a groove shape, and a receiving space is formed therein. The display portion 1812 includes an opening formed in the first body portion 181a at a corresponding position of the display 171. In this embodiment, since the separate input portion 172 is provided, the opening portion 1821 is covered with a transparent sheet-like display cover. For protecting the display 171. The display cover and the first body portion 181a may be two separate members or may be integrally formed.

A sealing member 1813 is provided between the periphery of the opening 1821 and the display module or between the first body portion 181a and the display module. The sealing member 1813 is elastically deformable. The sealing member 1813 is annular or generally annular. The sealing member 1813 is formed of a material having cushioning properties. As a material for forming the sealing member, a foamed urethane rubber may be used. The sealing member 1813 also functions as a buffer member for reducing an impact applied to the display 171.

As shown in fig. 9, a protective sleeve 181b is formed or attached to the outside of the first body portion 181a. The protective cover 181b forms an opening at the display portion 1812 and the input portion 172 for a user to view and operate. The protective sleeve 181b has a good appearance and protective effect. The protective sleeve 181b is connected to or integrally injection molded with the first body portion 181a. Or the protective sleeve 181b is made of an elastic material, and is sleeved or embedded in the first body portion 181a by elastic deformation.

The second connection portion 181c connects the first body portion 181a with the first cover 112 or the first housing 111. In the present embodiment, the second connection portion 181c connects the first body portion 181a and the first cover 112. The second connection portion 181c is connected to or formed on the first body portion 181 a. As shown in fig. 7, in the present embodiment, the second connection portion 181c is connected to the first cover 112 by a fastener. Such as threaded fasteners. In other alternative embodiments, the second connection portion 181c is provided with a hook portion or a buckle portion, and the first cover 112 or the first housing 111 is provided with a mating portion that receives the hook portion or the buckle portion. The second cover 181 may be detachably connected to the first cover 112 or the first casing 111.

In other alternative embodiments, as shown in fig. 11, the retention assembly 18 also includes a second receptacle 186. The second receiving portion 186 cooperates with the first receiving portion to form a box-like space. That is, the second receiving portion has a receiving groove formed therein opposite to the opening of the first receiving portion 1811. The second accommodating part is matched with the accommodating groove of the first accommodating part. The display module is arranged in a space formed by the second accommodating part and the first accommodating part. Wherein, the second accommodating part is entirely made of buffer material or at least the part forming the accommodating groove structure is made of buffer material, such as rubber. To achieve further buffering of vibrations received by the display module.

As shown in fig. 17, the screen size and the display area ratio of the display 171 are further improved due to the improvement of the vibration resistance of the display module in the present application. The screen size of the display 171 is 2.68 inches or less. In the present embodiment, the ratio of the display area of the display 171 to the area of the rear end face of the holding member 18 is 13% or more and 50% or less. The ergonomics of the product are improved. Further improvements in appearance, comfort of use and user adaptability are provided. In this embodiment, the display 171 can withstand vibrations of 40 to 60 m/s2 acceleration in the X/Y/Z directions under standard test conditions.

In the present embodiment, in order to maintain compactness of the overall length of the impact tool, an axial length L1 from the rear side of the holding assembly 18 to the front side of the display module is 15mm or less in the first axis 101 direction as shown in fig. 2. In some embodiments, the axial length L1 of the rear side of the retention assembly 18 to the front side of the display module is 13mm or less.

The human-machine interaction component 17 further comprises: and a communication interface. In this embodiment, the communication interface is a TYPE-C interface. In other alternative embodiments, a UBS interface, a serial interface, etc. may be provided. The second cover 181 has a channel 1831 formed therein to mount the TYPE-C interface 183. The TYPE-C interface 183 is used for connection and signal transmission with an upper computer. For updating of impact tool information. The TYPE-C interface 183 is coupled to the second controller 192.

A seal cap 184 is provided on the channel 1831 of the TYPE-C interface 183, the seal cap 184 comprising a first state covering the TYPE-C interface and a second state exposing the TYPE-C interface. In the first state and the second state, the sealing cover 184 is connected to the second cover 181. Wherein the channel 1831 is substantially rectangular. The TYPE-C interface is mounted in channel 1831. The channel 1831 extends radially along the first axis 101. In the present embodiment, the TYPE-C interface 183 is provided at the lower side of the second cover 181. The seal cover 184 is switched between the first state and the second state in the up-down direction. Specifically, the seal cap 184 includes a plug 1841 and a stop lever 1842 that cover the passageway. The limit lever 1842 is engaged with the limit groove 1814 inside the second cover 181. The channel 1831 for installing the TYPE-C interface is integrally formed with the second cover 181. To allow the seal cap 184 to fit into the second cap 181, two shaped or sized openings are provided in the channel 1831. Wherein, the first opening is used for making the stop lever 1842 enter the inner side of the second cover 181, and the second opening is connected with the first opening and used for limiting the stop lever 1842 to a position where the stop lever 1814 can enter.

In this embodiment, the host computer communicates with the second controller 192 via a TYPE-C interface.

The impact wrench 100 also includes a switch 194 for activating or deactivating the motor 12. The switch 194 is electrically connected to the control mechanism 19. The switch 194 is electrically connected to the first controller 191.

In the present embodiment, as shown in fig. 18, the control mechanism 19 of the impact wrench 100 includes: the first controller 191 and the second controller 192 described above. The first controller 191 is the main circuit board of the impact tool. The first controller 191 controls the power supply device to cut off or supply power to the motor 12. The second controller 192 receives the operation parameters set by the user and transmits them to the first controller 191. The first controller 191 controls the operation of the motor 12. Meanwhile, the first controller 191 transmits actual operation data of the motor 12 to the second controller 192, for example, forward or reverse rotation information of the output shaft 131. Wherein the second controller 192 controls the man-machine interaction assembly 17 to display and output information. The first control unit controls the rotational speed of the motor 12 by controlling electrical parameters such as current, voltage, duty cycle, etc. in the motor drive circuit. The motor drive circuit is mainly used for supplying power to the motor and is used for realizing the change and control of the electric parameters supplied to the motor 12 by the first control unit.

The control mechanism 19 also includes a detection assembly 193. Specifically, the detection assembly 193 includes: a first detection component 1931 and a second detection component 1932. The first detecting unit 1931 is used for judging whether an impact occurs between the impact mechanism 15 and the output shaft 131. In this embodiment, the first detecting component 1931 is configured to collect the current of the motor 12, and determine whether an impact occurs according to the current variation during the impact. In other alternative embodiments, the first detection component 1931 makes decisions and gathers by generating various physical signals upon impact, such as electrical signals, audio signals, etc., and then feeds back to the first control unit. The second detecting component 1932 is respectively connected to the motor 12 and the first control unit, and is configured to detect an operation parameter of the motor 12, and feed back to the first control unit, so that the first control unit adjusts the control of the motor 12.

In this embodiment, the status indicator 173 performs the first status display when the motor operation parameter reaches the setting, and performs the second status display when the motor operation parameter does not conform to the preset. As shown in fig. 19, after the motor is started, if the status indicator 173 is turned off, the switch 194 is continuously triggered. If the status indicator 173 is not turned off, the switch 194 is again triggered after the first interval until the status indicator 173 is turned off, and the switch 194 is continuously triggered.

When the impact mechanism begins to impact, the second detecting component 1932 detects that the motor operating parameter reaches the set operating parameter, and the status indicator 173 displays the first status. If the impact mechanism is not impacted or the second detecting component 1932 detects that the motor operation parameter does not reach the set operation parameter, the motor 12 is stopped, and the status indicator 173 displays a second status. The switch 194 is triggered again after the first interval or no operation is performed on the switch 194 after the first interval, the status indicator 173 is turned off. In the present embodiment, the first state is displayed with the status indicator lamp 173 displayed green, and the second state is displayed with the status indicator lamp 173 displayed red. In other alternative embodiments, different status displays may also be distinguished by blinking versus normal lighting, blinking at a different frequency, or other different colors. The first interval time is 3s, but the specific duration does not affect the essence of the application; the specific control flow is not limited to the impact tool with a constant torque output, as shown in fig. 19, and is specifically as follows:

(501) Starting;

(502) The state indicator lamp is in an off state, and a switch is triggered at the moment;

(503) Starting a motor, and working according to set operation parameters;

(504) Judging whether the impact mechanism applies impact force to the output shaft, if so, performing the step (505), and if not, turning to the step (503);

(505) Detecting the current operation parameters of the motor;

(506) Judging whether the operation parameters are satisfied, if yes, proceeding to step (507), otherwise proceeding to step (508)

(507) The first state of the state indicator lamp is displayed;

(508) Judging whether the motor is stopped, if so, performing a step (509), otherwise, turning to a step (505);

(509) And displaying a second state of the state indicator lamp.

As shown in fig. 17, the input portion of the human-machine interaction assembly 17 includes three operation members. Comprising the following steps: plus "+" key 1721, minus "-" key 1723, and confirm "v" key 1722. The specific use mode is as follows: long presses of the confirm key 1722 enter an adjustable state. For example, the long press is 1 s.+ -. 0.2s. Short presses of the confirm key 1722 will toggle under three or more adjustable items, e.g., 21ms±3ms short presses. In this embodiment, three adjustable items are provided on the display 171, including motor speed, impact time, and memory gear. When the operation parameter setting is required, namely, the motor rotation speed and the impact time are adjusted, the memory gear is displayed as 0. In other alternative embodiments, the adjustable items may be adjusted according to the setting requirements.

In the case of forward rotation of the motor 12, the add key 1721 is pressed in the adjustable state and the gear is increased by 1. Pressing the decrease key 1723 decreases the gear by 1. A long press of the up key 1721 or the down key 1723 enters a fast pacing mode, e.g., 500ms±50ms. The gear is regulated once when each interval is fixed, the quick speed regulating mode is released and the gear when the quick speed regulating mode is released is displayed. Wherein, the fixed time may be 100ms + -20 ms.

In the event that the motor 12 is reversed, the adjustable state includes two fixed gears, and pressing the plus or minus key will switch between the two fixed gears.

When the memory gear adjustment state is entered, the key-up gear is pressed to increase by 1, and the key-down gear is pressed to decrease by 1. The memory gear is a gear in which the user stores commonly used operation parameter data and arranges the data in sequence.

Exiting the adjustable state includes at least two ways: first, the motor 12 is started to exit the adjustable state by pressing the switch 194, and the man-machine interaction assembly 17 cannot be adjusted, i.e. the input part 172 is locked. Second, no operation time exceeds a preset time threshold, for example, 3s±0.5s, and the human-computer interaction component 17 is out of the adjustable state, i.e., the input part 172 is locked.

The foregoing has shown and described the basic principles, principal features and advantages of the application. It will be appreciated by persons skilled in the art that the above embodiments are not intended to limit the application in any way, and that all technical solutions obtained by means of equivalent substitutions or equivalent transformations fall within the scope of the application.

Claims (10)

1. An impact tool, comprising:

a motor including a drive shaft rotating about a first axis;

the output mechanism comprises an output shaft for outputting power outwards;

an impact mechanism for applying an impact force to the output shaft;

A housing including a first housing extending substantially along a first axis, the first housing at least a portion of the motor; the first cover body is mounted to one end, far away from the output mechanism, of the first shell body, a first bearing seat is formed or connected to the inner side surface of the first cover body, and the first bearing seat is used for supporting a bearing of one end, far away from the output mechanism, of the driving shaft;

the display mechanism comprises a man-machine interaction assembly and a holding assembly, wherein the man-machine interaction assembly is configured to be operated and can output information; the holding component is used for supporting the man-machine interaction component; the holding assembly is arranged outside the first cover body.

2. The impact tool of claim 1, wherein the display mechanism is disposed at a rear end of the first cover in a first axial direction.

3. The impact tool according to claim 1, wherein when the maximum output torque of the impact tool is 850n·m or more, an axial length L from a front end of the housing to a rear end of the display mechanism is 175mm or less in the first axis direction.

4. The impact tool according to claim 1, wherein when the maximum output torque of the impact tool is 200N-m or more and 850N-m or more, an axial length from a front end of the housing to a rear end of the display mechanism is 160mm or less in the first axial direction.

5. The impact tool of claim 1, wherein the human-machine interaction assembly comprises:

A display for being operated and/or displayed;

And the second controller is used for controlling the display, the second controller is provided with a second control unit, the second controller is electrically connected with the first controller used for controlling the motor, and the first controller is provided with a first control unit.

6. The impact tool of claim 5, wherein the retaining assembly comprises:

A second cover body formed with a first housing portion in which the display is disposed; the second cover body is provided with a display part for displaying the display content of the display;

And a fixing part, wherein an opening part which is suitable for the display area of the display is formed, a first connecting part is formed or connected on the periphery of the opening part, and the display and the second controller are tightly connected by the first connecting part.

7. The impact tool of claim 6, wherein the display is located between the fixed portion and the second controller, and the first connecting portion is interference fit with at least two sides of the second controller.

8. The impact tool of claim 6, wherein the human-machine interaction assembly further comprises: TYPE-C interface, be formed with the installation on the second lid TYPE-C interface's passageway, the passageway is integrated into one piece structure.

9. The impact tool of claim 8, wherein a sealing cover is provided on the channel of the TYPE-C interface, the sealing cover comprising a first state covering the TYPE-C interface and a second state exposing the TYPE-C interface, the sealing cover being connected to the second cover in both the first state and the second state.

10. A power tool, comprising:

a motor including a drive shaft rotating about a first axis;

the output mechanism comprises an output shaft for outputting power outwards;

A housing including a first housing extending substantially along a first axis, the first housing at least a portion of the motor; the first cover body is mounted to one end, far away from the output mechanism, of the first shell body, a first bearing seat is formed or connected to the inner side surface of the first cover body, and the first bearing seat is used for supporting a bearing of one end, far away from the output mechanism, of the driving shaft; a second cover body formed with a receiving portion; the second cover body is connected to the first cover body and/or the outer side of the first shell body.