WO2023050483A1

WO2023050483A1 - Operation method for electric screwdriver

Info

Publication number: WO2023050483A1
Application number: PCT/CN2021/123673
Authority: WO
Inventors: 杨勇
Original assignee: 苏州造物空间智能科技有限公司
Priority date: 2021-09-28
Filing date: 2021-10-14
Publication date: 2023-04-06
Also published as: CN113787484A

Abstract

The present invention provides an operation method for an electric screwdriver, comprising: holding a gripping portion so that a palm rest abuts against a palm, and manually controlling an electric screwdriver to work, or triggering, by means of a control switch, the electric screwdriver to perform electric work; or clamping the gripping portion by fingers so that the palm rest abuts against a middle finger or an index finger, and manually controlling the electric screwdriver to work; or clamping an operation region by fingers so that the palm rest abuts against the middle finger or the index finger, and triggering, by means of the control switch, the electric screwdriver to perform electric work. According to the present invention, the palm rest capable of freely pivoting is provided at the rear end of the electric screwdriver, such that by means of the operation method of the present invention, the resistance generated during the operation of the screwdriver is facilitated to be reduced, free rotation and operation of the screwdriver are convenient, and the practicality of the screwdriver and the comfort during use are improved.

Description

Operation method of electric screwdriver

technical field

The invention relates to an electric tool, in particular to an operation method of an electric screwdriver.

Background technique

At present, the operation method of the electric screwdriver is an electric tool used for screw installation and disassembly, which includes structures such as a bit, a motor, and a battery. However, when using the existing manual-integrated electric screwdriver, the rear end cannot be placed against the palm of the hand, so that it cannot be conveniently pivoted, thereby affecting the use of the tool. Therefore, in view of the above problems, it is necessary to propose a further solution.

Contents of the invention

The present invention aims to provide an operation method of an electric screwdriver, so as to overcome the deficiencies in the prior art and add a new way of using the electric screwdriver.

In order to solve the problems of the technologies described above, the technical solution of the present invention is:

A method for operating an electric screwdriver, comprising: a screwdriver body and a palm rest pivotally connected to the tail end of the screwdriver body;

The front part of the screwdriver body forms an operation area, the operation area has a control switch, and the rear area of the screwdriver body forms a grip part;

The method of operation includes:

Hold the holding part so that the palm rest is against the palm, manually control the electric screwdriver to work, or trigger the electric screwdriver to work electrically by controlling the switch;

or;

By clamping the grip part with fingers, making the palm rest against the middle finger or index finger, the electric screwdriver is manually controlled to work;

or;

Clamp the operating area with your fingers, make the palm rest against the middle finger or index finger, and trigger the electric screwdriver to perform electric work by controlling the switch;

or;

Hold the grip part with your thumb, index finger and middle finger to manually control the electric screwdriver to work, or hold the operating area with your thumb, index finger and middle finger, and trigger the electric screwdriver to work by controlling the switch. Electric work.

As an improvement to the operating method of the electric screwdriver of the present invention, the pivot of the palm rest is arranged coaxially with the axis of the screwdriver body, and the palm rest also has a force-bearing surface capable of abutting against a human hand.

As an improvement to the operation method of the electric screwdriver of the present invention, the palm rest can rotate 360° within the plane where it is located.

As an improvement to the operation method of the electric screwdriver of the present invention, the holding part is held so that when the palm rest is against the palm of the hand, the electric screwdriver is parallel to the back of the hand or perpendicular to the back of the hand.

As an improvement of the operation method of the electric screwdriver of the present invention, the control switch includes: a forward rotation button, a reverse rotation button and a speed regulation push button;

The forward rotation button and the reverse rotation button are arranged on one side of the front part, and the speed regulating push knob is arranged on the other side of the front part.

As an improvement to the operation method of the electric screwdriver of the present invention, the electric screwdriver also includes an end cover, the end cover is screwed to the tail end of the housing, and the end surface of the end cover is also equipped with a The palm rest is pivotally connected to the hinge.

As an improvement of the operation method of the electric screwdriver of the present invention, the electric part of the screwdriver body includes: a housing, a transmission mechanism, a circuit board and a power supply;

The power supply is arranged in the battery compartment at the rear of the housing, the transmission mechanism is located in the installation cavity at the front of the housing, the circuit board is located between the transmission mechanism and the power supply, and the power supply passes through The positive electrode piece is electrically connected to the circuit board, the circuit board is also electrically connected to the housing through the negative electrode piece, and the circuit board is electrically connected to the transmission mechanism.

As an improvement of the operation method of the electric screwdriver of the present invention, the transmission mechanism includes: an output shaft, a positioning sleeve, a shift fork, a straight pin and a motor, one end of the output shaft forms the output end of the electric part, and the shift fork It has a plurality of fork legs and a shift block located between any adjacent fork legs. The cylindrical pin, the positioning sleeve is sleeved on the fork pin of the shift fork, any of the cylindrical pins abuts against the inner surface of the positioning sleeve and the outer surface of the other end of the output shaft, and the motor The motor shaft is connected with the transmission fork.

As an improvement to the operation method of the electric screwdriver of the present invention, the inner surface of the fork of the shift fork facing the output shaft is a combination of an arc surface, a plane, and an arc surface; the inner surface of the shifting block is combined with a The surface connected to the adjacent fork on one side, and the surface connected to the adjacent fork on the other side, the inner surface of the shift block is inclined towards the center; the other end of the output shaft is abutted against the cylindrical pin The outer surface of is a combination of two planes.

As an improvement to the operation method of the electric screwdriver of the present invention, the circuit board includes a control circuit board and a speed regulation circuit board arranged up and down, the power supply is electrically connected to the control circuit board through the positive plate, and the control circuit board It is also electrically connected to the casing through the negative plate, the forward rotation button and the reverse rotation button are electrically connected to the control circuit board, and the speed regulation push knob is electrically connected to the speed regulation circuit board.

Compared with the prior art, the beneficial effect of the present invention is: the present invention sets a palm rest that can pivot freely at the rear end of the electric screwdriver, so according to the operation method of the present invention, it is beneficial to reduce the stress when the screwdriver is operated. The resistance facilitates the free rotation and operation of the screwdriver, and improves the practicability and comfort of the screwdriver.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments described in the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is the three-dimensional exploded schematic diagram of an embodiment of the electric screwdriver of the present invention;

Figure 2 is a schematic plan view of the combination of the output shaft, positioning sleeve, shift fork and cylindrical pin;

Fig. 3 is a three-dimensional exploded schematic diagram of the assembly shown in Fig. 2;

Fig. 4 is a sectional view of section A when the shift fork is in the active state and rotates clockwise;

Fig. 5 is a cross-sectional view of section A when the shift fork is in an active state and rotates counterclockwise;

Fig. 6 is a sectional view of section B when the shift fork is in an active state and rotates clockwise;

Fig. 7 is a sectional view of section B when the shift fork is in an active state and rotates counterclockwise;

Fig. 8 is a sectional view of section A when the output shaft is in active state and rotates clockwise;

Fig. 9 is a sectional view of section A when the output shaft is in active state and rotates counterclockwise;

Figure 10 is a sectional view of the B section when the output shaft is in the active state and rotates clockwise;

Fig. 11 is a cross-sectional view of the B section when the output shaft is in the active state and rotates counterclockwise;

Figure 12-15 is the operation method of the electric screwdriver according to one embodiment of the present invention. At this time, hold the grip part so that when the palm rest is against the palm of the hand, the electric screwdriver is parallel to the back of the hand;

Wherein, Fig. 12 corresponds to a schematic diagram of posture of forward rotation control in electric mode, Fig. 13 corresponds to a schematic diagram of posture of reverse rotation control in electric mode, Fig. 14 corresponds to a schematic diagram of posture of speed regulation in electric mode, and Fig. 15 corresponds to a schematic diagram of posture of manual mode;

Figure 16 - is the operation method of the electric screwdriver according to an embodiment of the present invention. At this time, hold the grip part so that when the palm rest is against the palm of the hand, the electric screwdriver is perpendicular to the back of the hand;

Wherein, Fig. 16 corresponds to a schematic diagram of posture of forward rotation control in electric mode, Fig. 17 corresponds to a schematic diagram of posture of reverse rotation control in electric mode, Fig. 18 corresponds to a schematic diagram of posture of speed regulation in electric mode, and Fig. 19 corresponds to a schematic diagram of posture of manual mode;

20-22 are the operation method of the electric screwdriver according to another embodiment of the present invention. At this time, the grip part or the operation area is clamped by the fingers, so that the palm rest is against the middle finger or the index finger;

Wherein, Fig. 20 corresponds to the attitude schematic diagram of forward rotation control in electric mode, Fig. 21 corresponds to the attitude diagram of reverse rotation control in electric mode, and Fig. 22 corresponds to the attitude diagram of manual mode;

Fig. 23 is an operation method of an electric screwdriver according to another embodiment of the present invention, at this time, the thumb, forefinger and middle finger are used to hold the grip part or operating area of the electric screwdriver.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

As shown in FIG. 1 , the operating method of an electric screwdriver according to an embodiment of the present invention includes: a bit 10 , an electric part 20 , a housing 30 , an end cover 40 and a palm rest 50 .

The electric part 20 is used to realize the rotation of the bit 10, and it is installed in the housing 30, and the bit 10 is installed at one end of the housing 30, and is connected with the output end of the electric part 20 in transmission. In this way, when the electric part 20 is working, it can drive the bit 10 to rotate forward or reversely.

The end cover 40 is mounted on the other end of the housing 30 , the palm rest 50 is pivotally connected to the end cover 40 , and the pivot axis of the palm rest 50 is coaxial with the axis of the housing 30 . So arranged, when the palm rest 50 is against the hand of the operator, the operation method of the electric screwdriver can pivot freely relative to the palm rest 50, which in turn helps to reduce the resistance during operation of the operation method of the electric screwdriver, and facilitates the operation of the electric screwdriver. Free rotation of the batch operation method as well as operation. At the same time, in order to make it easier for the palm rest 50 to abut against the operator's hand, the palm rest 50 also has a force-bearing surface capable of abutting against the hand.

In an embodiment of pivotal connection, the end cover 40 is screwed to the rear end of the housing 30 , and the end surface of the end cover 40 also has a rotating shaft 41 suitable for the pivotal connection of the palm rest 50 . In order to facilitate free pivoting of the palm rest 50 , the palm rest 50 is pivotally connected to the rotating shaft 41 through a bearing 51 . Therefore, the palm rest 50 can rotate 360° within the plane.

The casing 30 includes: an inner casing 31 and an outer casing 32 .

Wherein, the outer casing 32 is arranged axially through, and the above-mentioned end cap 40 is screwed on the tail end of the outer casing 32, and at the same time, the front end of the outer casing 32 is fastened with a protective cover 33, and the protective cover 33 is arranged axially through, so that The bit 10 can be assembled at the front end of the outer casing 32 .

The inner casing 31 is disposed in the outer casing 32 , and correspondingly, the outer casing 32 has a buckle that snaps into the inner casing 31 . Multiple buckles can be provided, and the multiple buckles are distributed on the inner side of the outer casing 32 along the circumferential direction, and snapped into corresponding slots. The inner casing 31 includes: a left casing 311 and a right casing 312 . The end surfaces of the left housing 311 and the right housing 312 are fitted together, and both of them jointly define an assembly space of the electric part 20 . The front part of the above-mentioned assembly space forms an installation cavity, and the rear part forms a battery compartment.

The electric part 20 includes: a transmission mechanism 21 , a circuit board 22 and a power supply 23 .

Wherein, the power supply 23 supplies power to the transmission mechanism 21 and the circuit board 22 , and the circuit board 22 controls the operation of the transmission mechanism 21 . In terms of installation, the power supply 23 is disposed in the battery compartment at the rear of the housing 30 , and the transmission mechanism 21 is located in the installation cavity at the front of the housing 30 .

The transmission mechanism 21 is used to directly drive the bit 10 to pivot, and it includes: an output shaft 211 , a positioning sleeve 212 , a shift fork 213 , a cylindrical pin 214 and a motor 215 .

Wherein, one end of the output shaft 211 forms the output end of the electric part 20, and the bit 10 is plugged into the output end. In order to facilitate the detachable insertion of the bit 10, the output shaft 211 is hollow, the bit 10 can be plugged into the output shaft 211, and the output shaft 211 is also provided with a magnet 216 capable of absorbing the bit 10, so as to prevent batch The head 10 is disengaged from the output shaft 211 . At the same time, the part of the bit 10 inserted into the output shaft 211 is designed to have at least one edge, so as to facilitate synchronous pivoting with the output shaft 211 . In addition, in order to facilitate the pivoting of the output shaft 211 , a bearing 217 is also provided between the output shaft 211 and the housing 30 .

The shift fork 213 has a plurality of fork legs 2131 and a shift block 2132 located between any adjacent fork legs 2131 . The shift fork 213 is set on the other end of the output shaft 211 through a plurality of fork legs 2131 and the shift block 2132, and a cylindrical pin 214 is arranged between any two adjacent fork legs 2131, and the positioning sleeve 212 is set on the shift fork 213 On the prong 2131 of the fork, any cylindrical pin 214 abuts against the inner surface of the positioning sleeve 212 and the outer surface of the other end of the output shaft 211 . Simultaneously, the motor 215 shaft of the motor 215 is in drive connection with the special-shaped hole offered on the shift fork 213 .

In one embodiment, as shown in FIGS. 2 and 3 , the inner surface of the fork foot 2131 of the shift fork 213 facing the output shaft 211 is a combination of an arc surface, a plane, and an arc surface. Two sides of the fork 2131 are 2131A. The surface of the shifting block 2132 connected to the adjacent fork 2131 on one side is 2132A, and the surface connected to the adjacent fork 2131 on the other side is 2132B. The surface 2132A and the surface 3132B are inclined towards the center. The outer surface where the other end of the output shaft 211 abuts against the cylindrical pin 214 is a combination of two

planes

211A, 211B. In order to facilitate the assembly of the positioning sleeve 212 , the two sides of the positioning sleeve 212 are also provided with limiting protrusions 2121 that snap into the housing 30 .

In this way, as shown in Figures 4, 5, 6, and 7, when the motor 215 is in the working state of driving output torque, the shift fork 213 rotates forward or reverse, and at the same time, the shifting blocks 2132A and 2132B are connected to the

output shafts

211A and 211B Engage to push the output shaft 211 to rotate; at the same time, its fork 2131 pushes the cylindrical pin 214, and the cylindrical pin 214 is now located in the center of the two surfaces of 211A and 211B. Therefore, no matter whether the shift fork 213 rotates forward or reverse, the output can be realized through the output shaft 211 .

When the cylindrical pin 214 is stuck between the positioning sleeve 212 and the output shaft 211, the output shaft 211 is locked by the positioning sleeve 212 due to the blocking of the cylindrical pin 214, and the reverse driving force of the output shaft 211 cannot be transmitted to the The fork is directly transferred to the positioning sleeve 212, and the positioning sleeve 212 has no relative degree of freedom with the housing 30, so that the output shaft 211 can be directly driven through the housing 30. At this time, since the above-mentioned palm rest 50 is provided, the free rotation and operation of the operation method of the electric screwdriver can be facilitated, and the practicability and comfort during use of the operation method of the electric screwdriver are improved.

In addition, when the motor 215 drives the shift fork 213 to rotate, as shown in FIGS. At this time, as shown in Figures 6 and 7, due to the push of the side 2131A of the fork 2131, the cylindrical pin 214 is at the largest gap between the output shaft 211 and the positioning sleeve 212, so that the cylindrical pin 214 can easily move with the mechanism , reducing rotation obstruction and noise.

As shown in Figures 8, 9, 10, and 11, when the output shaft 211 is in the active state, that is, when the output shaft 211 is actively rotating, it is in the manual mode at this time. The cylindrical pin 214 will be stuck between the output shaft plane 4 and the inner arc surface of the positioning sleeve 212 to form self-locking.

The circuit board 22 is located between the transmission mechanism 21 and the power supply 23 , the power supply 23 is electrically connected to the circuit board 22 through the positive plate, the circuit board 22 is also electrically connected to the housing 30 through the negative plate, and the circuit board 22 is electrically connected to the transmission mechanism 21 .

Wherein, the circuit board 22 includes: a control circuit board 221 and a speed regulating circuit board 222 arranged up and down. Specifically, the power supply 23 is electrically connected to the control circuit board 221 through the positive plate 24 , and the control circuit board 221 is also electrically connected to the housing 30 through the negative plate 25 , thus forming a control loop through the housing 30 .

In order to realize forward and reverse operations, the control circuit board 221 has a forward rotation button 223 and a reverse rotation button 224 arranged on one side of the housing 30, and the above-mentioned forward rotation button 223 and reverse rotation button 224 can be connected with corresponding contacts on the control circuit board 221. point against each other. At the same time, the speed regulating circuit board 222 has a speed regulating push knob 225 disposed on the other side of the housing 30 , so as to facilitate the speed regulating operation. Correspondingly, the speed regulating push knob 225 can abut against corresponding contacts on the speed regulating circuit board 222 .

The power supply 23 is specifically a battery, and the positive pole of the battery is connected to the circuit board 22 via the above-mentioned positive pole piece 24 . Wherein, the positive electrode sheet 24 is housed in a pull plate 226, and the positive electrode of the battery can be connected with the positive electrode sheet 24 when stretching in the pull plate 226, so that the battery cannot be connected when it is placed upside down, thereby playing a protective effect. Moreover, a spring 227 is also provided between the negative electrode of the battery and the end cap 40 .

Based on the electric screwdriver described in the above embodiment, the operation method of the electric screwdriver according to an embodiment of the present invention includes:

Hold the grip part so that the palm rest is against the palm, and the electric screwdriver is manually controlled to work, or the electric screwdriver is triggered to perform electric work by controlling the switch.

Wherein, hold the grip part so that when the palm rest is against the palm of the hand, the electric screwdriver is parallel to the back of the hand, and the operation method at this time is shown in Figure 12-15. Therefore, under this operation method, when the electric screwdriver is not started, the rotation of the electric screwdriver can be manually controlled, thereby realizing the manual operation of the electric screwdriver. Alternatively, the electric screwdriver is started by triggering the forward rotation button or the reverse button, and the speed of the screwdriver is adjusted by adjusting the speed, so that the electric screwdriver can perform electric work under the control of the electric part.

Similarly, hold the gripping part so that when the palm rest is against the palm of the hand, the electric screwdriver is perpendicular to the back of the hand, and the operation method at this time is shown in Figures 16-19. Therefore, under this operation method, when the electric screwdriver is not started, the rotation of the electric screwdriver can be manually controlled, thereby realizing the manual operation of the electric screwdriver. Alternatively, the electric screwdriver is started by triggering the forward rotation button or the reverse button, and the speed of the screwdriver is adjusted by adjusting the speed, so that the electric screwdriver can perform electric work under the control of the electric part.

Based on the electric screwdriver described in the above embodiment, the operation method of the electric screwdriver in another embodiment of the present invention includes:

Clamp the grip part with your fingers, make the palm rest against the middle finger or index finger, and manually control the electric screwdriver to work;

Clamp the operating area with your fingers, make the palm rest against the middle finger or index finger, and trigger the electric screwdriver to perform electric work through the control switch.

The operation method at this time is shown in Figure 20-22. Therefore, under this operation method, when the electric screwdriver is not started, the rotation of the electric screwdriver can be manually controlled, thereby realizing the manual operation of the electric screwdriver. Alternatively, the electric screwdriver is started by triggering the forward rotation button or the reverse button, and the speed of the screwdriver is adjusted by adjusting the speed, so that the electric screwdriver can perform electric work under the control of the electric part.

The operation method at this time is shown in Figure 23. Therefore, under this operation method, when the electric screwdriver is not started, the rotation of the electric screwdriver can be manually controlled, thereby realizing the manual operation of the electric screwdriver. Alternatively, the electric screwdriver is started by triggering the forward rotation button or the reverse button, and the speed of the screwdriver is adjusted by adjusting the speed, so that the electric screwdriver can perform electric work under the control of the electric part.

In summary, the present invention arranges a freely pivotable palm rest at the rear end of the electric screwdriver, so according to the operation method of the present invention, it is beneficial to reduce the resistance when the screwdriver is operated, facilitate the free rotation of the screwdriver and The operation improves the practicability of the screwdriver and the comfort during use.

It will be apparent to those skilled in the art that the invention is not limited to the details of the above-described exemplary embodiments, but that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Accordingly, the embodiments should be regarded in all points of view as exemplary and not restrictive, the scope of the invention being defined by the appended claims rather than the foregoing description, and it is therefore intended that the scope of the invention be defined by the appended claims rather than by the foregoing description. All changes within the meaning and range of equivalents of the elements are embraced in the present invention. Any reference sign in a claim should not be construed as limiting the claim concerned.

In addition, it should be understood that although this specification is described according to implementation modes, not each implementation mode only contains an independent technical solution, and this description in the specification is only for clarity, and those skilled in the art should take the specification as a whole , the technical solutions in the various embodiments can also be properly combined to form other implementations that can be understood by those skilled in the art.

Claims

A method for operating an electric screwdriver, characterized in that the electric screwdriver comprises: a screwdriver body and a palm rest pivotally connected to the tail end of the screwdriver body;

The front part of the screwdriver body forms an operation area, the operation area has a control switch, and the rear area of the screwdriver body forms a grip part;

The method of operation includes:

Hold the holding part so that the palm rest is against the palm, manually control the electric screwdriver to work, or trigger the electric screwdriver to work electrically by controlling the switch;

or;

By clamping the grip part with fingers, making the palm rest against the middle finger or index finger, the electric screwdriver is manually controlled to work;

or;

Clamp the operating area with your fingers, make the palm rest against the middle finger or index finger, and trigger the electric screwdriver to perform electric work by controlling the switch;

or;

Hold the grip part with your thumb, index finger and middle finger to manually control the electric screwdriver to work, or hold the operating area with your thumb, index finger and middle finger, and trigger the electric screwdriver to work by controlling the switch. Electric work.
The operation method of the electric screwdriver according to claim 1, wherein the pivot of the palm rest is arranged coaxially with the axis of the screwdriver body, and the palm rest also has a bearing that can be abutted against the human hand. strength surface.
The operation method of the electric screwdriver according to claim 1 or 2, characterized in that, the palm rest can rotate 360° within the plane where it is located.
The operation method of the electric screwdriver according to claim 1, wherein the electric screwdriver is parallel to the back of the hand or perpendicular to the back of the hand when the holding part is held so that the palm rest is against the palm of the hand.
The operation method of the electric screwdriver according to claim 1, wherein the control switch includes: a forward rotation button, a reverse rotation button, and a speed regulation push button;

The forward rotation button and the reverse rotation button are arranged on one side of the front part, and the speed regulating push knob is arranged on the other side of the front part.
The operation method of the electric screwdriver according to claim 1, characterized in that the electric screwdriver also includes an end cover, the end cover is screwed to the tail end of the housing, and the end surface of the end cover is There is also a hinge adapted to the pivotal connection of the palm rest.
The operating method of an electric screwdriver according to claim 1, wherein the electric part of the screwdriver body includes: a housing, a transmission mechanism, a circuit board, and a power supply;

The power supply is arranged in the battery compartment at the rear of the housing, the transmission mechanism is located in the installation cavity at the front of the housing, the circuit board is located between the transmission mechanism and the power supply, and the power supply passes through The positive electrode piece is electrically connected to the circuit board, the circuit board is also electrically connected to the housing through the negative electrode piece, and the circuit board is electrically connected to the transmission mechanism.
The operation method of an electric screwdriver according to claim 7, wherein the transmission mechanism comprises: an output shaft, a positioning sleeve, a shift fork, a cylindrical pin, and a motor, and one end of the output shaft forms the output of the electric part end, the shift fork has a plurality of fork legs and a shift block located between any adjacent fork legs, the fork legs of the shift fork are sleeved on the other end of the output shaft, and any two adjacent fork legs The cylindrical pins are arranged between them, the positioning sleeve is sleeved on the fork pin of the shift fork, any of the cylindrical pins is connected to the inner surface of the positioning sleeve and the outer surface of the other end of the output shaft Against each other, the motor shaft of the motor is in transmission connection with the shift fork.
The operation method of an electric screwdriver according to claim 8, wherein the inner surface of the fork of the shift fork facing the output shaft is a combination of an arc surface, a plane, and an arc surface; the shift block The inner surface of the shift block is the surface connected with the adjacent fork on one side, and the surface connected with the adjacent fork on the other side, the inner surface of the shift block is inclined towards the center; the other end of the output shaft is connected to the The outer surface against which the cylindrical pin abuts is a combination of two planes.
The method for operating an electric screwdriver according to claim 7, wherein the circuit board includes: a control circuit board and a speed regulation circuit board arranged up and down, and the power supply is electrically connected to the control circuit board through the positive plate , the control circuit board is also electrically connected to the housing through the negative plate, the forward rotation button and the reverse rotation button are electrically connected to the control circuit board, and the speed regulation push-knob is electrically connected to the speed regulation circuit board connect.