A power tool transmission mechanism with shaft locking function

Abstract

The present invention discloses an electric tool transmission mechanism with a shaft locking function, which is used for power transmission of electric tools, and is mainly used for electric screwdrivers, electric screwdrivers and other electric tools, including a motor, a transmission mechanism and an output spindle. The transmission mechanism is composed of a reduction gear box and an axial locking device. The reduction gear box includes a speed change internal gear sleeve, an input gear and a transmission planetary gear. The axial locking device includes a shaft locking protective sleeve, a shaft locking cam, a shaft locking pin and a shaft locking intermediate piece. The present invention has a simple structure and a reasonable design, can increase torque and have a shaft locking effect, so that the electric tool to which the present invention is applied has a manual and automatic integration function. At the same time, the shaft locking cam combines a long pin and a short pin to control the movement of the shaft locking pin, which can effectively ensure the stable occurrence of the shaft locking effect, avoid shaft locking failure, and is more stable to use.

Description

Technical Field

[0001] The invention relates to the technical field of electric tools, in particular to an electric tool transmission mechanism with a shaft locking function. Background Art

[0002] Power tools refer to tools that use electrical energy to do work and output force. They usually include a work device, a transmission mechanism, and an output mechanism. The work device converts electrical energy into kinetic energy output, which can also be called an input device. The input function is transmitted through the transmission mechanism and then works outward through the output mechanism. Common power tools include electric screwdrivers, electric screwdrivers, etc.

[0003] Most commonly used power tools often do not have an axis lock function, that is, they cannot be used without power during daily use. A small number of power tools with an axis lock function often have certain defects. The most prominent defect is that the axis lock function is unstable, that is, when there is no power, the power tool will slip during use. The main reason is that the axial locking device is unstable and the locking structure cannot stably move to the locking position. Summary of the invention

[0004] In view of the above problems, the present invention discloses an electric tool transmission mechanism with a shaft locking function.

[0005] The specific technical solutions are as follows:

[0006] An electric tool transmission mechanism with a shaft locking function, characterized in that it comprises a motor, a transmission mechanism and an output spindle;

[0007] The motor is connected to the transmission mechanism for power output;

[0008] The transmission mechanism is composed of a reduction gearbox and an axial locking device. The reduction gearbox is a planetary gear reduction box, which is used for receiving and transmitting power and can be self-locking.

[0009] The output spindle is connected to the axial locking device, receives the power transmitted by the axial locking device, is used to connect to the electric tool head, and performs output work.

[0010] The above-mentioned electric tool transmission mechanism with an axis locking function, wherein the reduction gear box is connected to the motor, receives the power input by the motor, and outputs it to the axial locking device after gear transmission and torque increase; the axial locking device receives the power transmitted by the reduction gear box and transmits it to the output spindle, and at the same time, self-locks after losing power.

[0011] The above-mentioned electric tool transmission mechanism with shaft locking function, wherein the reduction gear box includes a speed change internal gear sleeve, an input gear and a transmission planetary gear, and the axial locking device includes a shaft locking protective sleeve, a shaft locking cam, a shaft locking pin and a shaft locking intermediate piece;

[0012] The speed change inner gear sleeve is in the shape of a cylindrical tube sleeve, and a circle of inner teeth distributed in an annular manner is provided on its inner wall. One end of the speed change inner gear sleeve is clamped with a limit buckle plate, and the other end is fixedly connected to the shaft lock protective sleeve. The transmission planetary gear is arranged in the speed change inner gear sleeve, and includes a gear plate and a first transmission gear. The gear plate is in the shape of a disc, and a first rotating shaft is provided on one side of the disc, and a transmission rotating tooth is provided on the other side. There are multiple first rotating shafts, and the multiple first rotating shafts are uniformly distributed circumferentially around the central axis of the gear plate. The first transmission gear corresponds to the first rotating shaft one by one, and is rotatably arranged on the first rotating shaft through a bearing, and its outer side is meshed with the inner teeth on the inner wall of the speed change inner gear sleeve, and the central axis of the transmission rotating tooth is consistent with the central axis of the gear plate;

[0013] The shaft lock protective sleeve is provided with an annular boss inside, and the shaft lock cam, shaft lock pin and shaft lock middle piece are arranged in the shaft lock protective sleeve through the boss. The shaft lock middle piece is disc-shaped, and a second rotating shaft is provided on one side thereof, and a long pin and a short pin are provided on the other side. There are multiple second rotating shafts, and the multiple second rotating shafts are evenly distributed circumferentially around the central axis of the shaft lock middle piece. The second rotating shaft extends into the speed change internal gear sleeve, and a second transmission gear is installed on it through a bearing. An output shaft is provided in the middle of the shaft lock cam, and a flange is provided on the edge. There are multiple flanges, and the multiple flanges are circumferentially uniform around the center of the shaft lock cam. Both sides of the flanges are pin grooves. A protrusion is arranged between adjacent flanges. The protrusion extends in the direction of the pin groove so that the spacing width between the pin groove and the shaft lock protective sleeve gradually decreases. The shaft lock pin is cylindrical, arranged at the pin groove, and protrudes from the flange surface. The number of the long pins and the short pins is the same, and they are circumferentially uniform and spaced. The long pin extends into the gap between the adjacent flanges, and the short pin is arranged at the flange and is located between the shaft lock pins on both sides of the flange.

[0014] The input gear is fixedly connected to the transmission shaft of the motor, passes through the limiting buckle plate, and meshes with the inner side of the first transmission gear. The transmission rotating gear meshes with the inner side of the second transmission gear. The outer side of the second transmission gear meshes with the inner tooth mouth on the inner wall of the speed change internal gear sleeve. The transmission main shaft is fixedly connected to the axial locking device through the output shaft.

[0015] The above-mentioned electric tool transmission mechanism with shaft locking function, wherein the number of the transmission planetary gears is multiple, and the multiple transmission planetary gears constitute a transmission planetary gear set, the first transmission gear on adjacent transmission planetary gears is meshed with the transmission rotating teeth, the transmission planetary gear at one end of the transmission planetary gear set is meshed with the input gear through the first transmission gear, and the other end is meshed with the inner side of the second transmission gear through the transmission rotating teeth to achieve transmission.

[0016] The above-mentioned electric tool transmission mechanism with shaft locking function, wherein the working modes of the electric tool transmission mechanism include automatic mode and manual mode, and have manual-automatic integrated function;

[0017] Automatic mode: The motor is driven by an external power source, and works through the input gear to the transmission planetary gear in the reduction gearbox, driving the first transmission gear to rotate. The rotating first transmission gear meshes with the internal teeth in the speed change internal gear sleeve, and the speed change internal gear sleeve is fixed. The first transmission gear drives the gear plate to rotate in the speed change internal gear sleeve. The rotating gear plate drives the second transmission gear to rotate through the transmission gear, and then drives the shaft lock middle piece to rotate; the rotating shaft lock middle piece drives the long pin and short pin on it to rotate synchronously, and the long pin pushes the shaft lock pin on one side of the flange to the pin groove and pushes the shaft lock cam to rotate. The rotating short pin will not push the shaft lock pin to the locking position; the rotating shaft lock cam causes the output shaft to rotate, driving the output spindle to rotate, and then power output is performed;

[0018] Manual mode: The motor has no external power supply and is not driven. The output spindle is subjected to external force and is transmitted to the axial locking device. At this time, the output shaft drives the shaft lock cam to rotate, and then drives the flange to rotate. The rotating flange squeezes the shaft lock pin on one side, causing the shaft lock pin to move synchronously, while the shaft lock pin on the other side is separated from the flange under the action of the static short pin and gradually approaches the raised part. Due to the reduction in the spacing width between the pin groove and the shaft lock protective sleeve, when the shaft lock pin reaches the locking position, the shaft lock pin is squeezed between the shaft lock cam and the shaft lock protective sleeve, frictionally locked, so that the shaft lock cam cannot rotate, resulting in a shaft locking effect. At this time, the output spindle can stably output power manually.

[0019] In the above-mentioned electric tool transmission mechanism with shaft locking function, the number of transmission planetary gears constituting the transmission planetary gear set is at least 2.

[0020] The above-mentioned electric tool transmission mechanism with shaft locking function, wherein the number of the flanges is at least 3, the number of the corresponding shaft locking pins is at least 6, and the ratio of the number of flanges to the number of shaft locking pins is 1:2;

[0021] The above-mentioned electric tool transmission mechanism with shaft locking function, wherein the long pins and short pins correspond to the flanges one by one and are the same in number;

[0022] In the above-mentioned electric tool transmission mechanism with shaft locking function, the protrusion is in the shape of an isosceles trapezoid.

[0023] The beneficial effects of the present invention are:

[0024] The present invention discloses an electric tool transmission mechanism with a shaft locking function, which is used for power transmission of electric tools, and is mainly used for electric screwdrivers, electric screwdrivers and other electric tools, including a motor, a transmission mechanism and an output spindle. The transmission mechanism is composed of a reduction gear box and an axial locking device. The reduction gear box includes a speed change internal gear sleeve, an input gear and a transmission planetary gear. The axial locking device includes a shaft locking protective sleeve, a shaft locking cam, a shaft locking pin and a shaft locking intermediate piece. The present invention has a simple structure and a reasonable design, can increase torque and have a shaft locking effect, so that the electric tool to which the present invention is applied has a manual and automatic integration function. At the same time, the shaft locking cam combines a long pin and a short pin to control the movement of the shaft locking pin, which can effectively ensure the stable occurrence of the shaft locking effect, avoid shaft locking failure, and is more stable to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the present invention.

[0026] Figure 2 Schematic diagram of the transmission mechanism.

[0027] Figure 3 It is a three-dimensional view of the front side of the transmission mechanism.

[0028] Figure 4 It is a three-dimensional view of the rear side of the transmission mechanism.

[0029] Figure 5 for Figure 2 Internal view of the vehicle (without the internal gear sleeve, shaft lock protective sleeve and limit buckle).

[0030] Figure 6 for Figure 3 Internal view of the vehicle (without the internal gear sleeve, shaft lock protective sleeve and limit buckle).

[0031] Figure 7 for Figure 4 Internal view of the vehicle (without the internal gear sleeve, shaft lock protective sleeve and limit buckle).

[0032] Figure 8 Schematic diagram of the input gear.

[0033] Fig. 9 Schematic diagram of the transmission planetary gear.

[0034] Fig.10 This is a three-dimensional diagram of the transmission planetary gear.

[0035] Fig.11 It is a three-dimensional diagram of the speed change internal gear sleeve.

[0036] Fig.12 It is a three-dimensional diagram of the shaft lock middle piece (the second transmission gear is not drawn).

[0037] Fig.13 This is the front view of the shaft lock middle piece.

[0038] Fig.14 This is the rear view of the shaft lock middle piece.

[0039] Fig.15 This is a three-dimensional view of the shaft lock cam.

[0040] Fig.16 This is the front view of the shaft lock cam.

[0041] Fig.17 for Figure 2 Middle, cross-section view in AA direction. DETAILED DESCRIPTION

[0042] In order to make the technical solution of the present invention clearer and more specific, the present invention is further described below in conjunction with embodiments. Any equivalent replacement of the technical features of the technical solution of the present invention and any solution derived by conventional reasoning shall fall within the protection scope of the present invention.

[0043] Embodiment 1

[0044] A power tool transmission mechanism with a shaft locking function in this embodiment includes a motor 30, a transmission mechanism 31 and an output spindle 32;

[0045] The motor is connected to the transmission mechanism for power output;

[0046] The transmission mechanism is composed of a reduction gearbox and an axial locking device. The reduction gearbox is a planetary gear reduction box, which is used for receiving and transmitting power and can be self-locking.

[0047] The output spindle is connected to the axial locking device, receives the power transmitted by the axial locking device, is used to connect to the electric tool head, and outputs work;

[0048] Among them, the reduction gearbox is connected to the motor transmission, receives the power input by the motor, and outputs it to the axial locking device after gear transmission and torque increase; the axial locking device receives the power transmitted by the reduction gearbox and transmits it to the output main shaft, and at the same time, self-locks after losing power.

[0049] Embodiment 2

[0050] The present embodiment is a power tool transmission mechanism with shaft locking function, wherein the reduction gear box 1 includes a speed change internal gear sleeve 3, an input gear 4 and a transmission planetary gear 5, and the axial locking device 2 includes a shaft locking protective sleeve 6, a shaft locking cam 7, a shaft locking pin 8 and a shaft locking intermediate piece 9;

[0051] The speed change inner gear sleeve 3 is in the shape of a cylindrical tube sleeve, and a circle of inner teeth 10 distributed in an annular manner is provided on its inner wall. One end of the speed change inner gear sleeve 3 is clamped with a limit buckle 11, and the other end is fixedly connected to the shaft lock protective sleeve 6. The transmission planetary gear 5 is arranged in the speed change inner gear sleeve 3, including a gear plate 12 and a first transmission gear 13. The gear plate 12 is in the shape of a disc, and a first rotating shaft 14 is provided on one side thereof, and a transmission rotating tooth 15 is provided on the other side. There are multiple first rotating shafts 14, and multiple first rotating shafts 14 are uniformly distributed circumferentially around the central axis of the gear plate 12. The first transmission gear 13 corresponds to the first rotating shaft 14 one by one, and is rotatably arranged on the first rotating shaft 14 through a bearing, and its outer side is meshed with the inner teeth 10 on the inner wall of the speed change inner gear sleeve 3, and the central axis of the transmission rotating tooth 15 is consistent with the central axis of the gear plate 12;

[0052] A ring-shaped boss 16 is arranged inside the shaft lock protective sleeve 6, and the shaft lock cam 7, the shaft lock pin 8 and the shaft lock middle piece 9 are arranged in the shaft lock protective sleeve 6 through the boss 16. The shaft lock middle piece 9 is in the shape of a disc, and a second rotating shaft 171 is arranged on one side thereof, and a long pin 22 and a short pin 23 are arranged on the other side. There are multiple second rotating shafts 171, and the multiple second rotating shafts 171 are uniformly distributed circumferentially around the central axis of the shaft lock middle piece 9. The second rotating shaft 171 extends into the internal gear sleeve 3 of the speed change, and a second transmission gear 172 is installed thereon through a bearing. An output shaft 21 is arranged in the middle of the shaft lock cam 7, and a flange 18 is arranged on the edge. There are multiple flanges 18, and the multiple flanges 18 are uniformly distributed circumferentially around the center of the shaft lock cam 7. There are pin grooves 19 on both sides of the flange 18, and a protrusion 20 is arranged between adjacent flanges 18. The protrusion 20 The shaft lock pin 8 is cylindrical, arranged at the pin groove 19, and protrudes from the surface of the flange 18. The number of the long pins 22 and the short pins 23 is the same, and they are arranged evenly and spaced in the circumferential direction. The long pins 22 extend into the gaps between adjacent flanges 18, and the short pins 23 are arranged at the flange 18, and are located between the shaft lock pins 8 on both sides of the flange 18;

[0053] The input gear 4 is fixedly connected to the transmission shaft of the motor 30, passes through the limit buckle 11, and meshes with the inner side of the first transmission gear 13. The transmission rotating gear 15 meshes with the inner side of the second transmission gear 172. The outer side of the second transmission gear 172 meshes with the inner tooth opening 10 on the inner wall of the speed change internal gear sleeve 3. The transmission main shaft 32 is fixedly connected to the axial locking device 2 through the output shaft 21.

[0054] This embodiment discloses the internal structure of the reduction gearbox and the axial locking device. The reduction gearbox is based on the principle of planetary gears to perform transmission and deceleration to increase torque. The axial locking device realizes transmission through an axial locking cam and an axial locking middle piece, and performs self-locking through an axial locking pin.

[0055] Embodiment 3

[0056] In this embodiment, a power tool transmission mechanism with a shaft lock function is provided, wherein the number of the transmission planetary gears 5 is multiple, and the multiple transmission planetary gears 5 constitute a transmission planetary gear set 24, the first transmission gears 13 on adjacent transmission planetary gears 5 are meshed with the transmission rotating teeth 15, the transmission planetary gear 5 at one end of the transmission planetary gear set 24 is meshed with the input gear 4 through the first transmission gear 13, and the other end is meshed with the inner side of the second transmission gear 171 through the transmission rotating teeth 15 to achieve transmission;

[0057] In this embodiment, the number of transmission planetary gears in the reduction gear box can be increased as needed to achieve a greater torque output.

[0058] Embodiment 4

[0059] The electric tool transmission mechanism with shaft locking function of this embodiment has an operating mode including an automatic mode and a manual mode, and has a manual-automatic integrated function;

[0060] Automatic mode: The motor is driven by an external power source, and works through the input gear to the transmission planetary gear in the reduction gearbox, driving the first transmission gear to rotate. The rotating first transmission gear meshes with the internal teeth in the speed change internal gear sleeve, and the speed change internal gear sleeve is fixed. The first transmission gear drives the gear plate to rotate in the speed change internal gear sleeve. The rotating gear plate drives the second transmission gear to rotate through the transmission gear, and then drives the shaft lock middle piece to rotate; the rotating shaft lock middle piece drives the long pin and short pin on it to rotate synchronously, and the long pin pushes the shaft lock pin on one side of the flange to the pin groove and pushes the shaft lock cam to rotate. The rotating short pin will not push the shaft lock pin to the locking position; the rotating shaft lock cam causes the output shaft to rotate, driving the output spindle to rotate, and then power output is performed;

[0061] Manual mode: The motor is not driven without external power supply. The output spindle is subjected to external force and is transmitted to the axial locking device. At this time, the output shaft drives the shaft lock cam to rotate, and then drives the flange to rotate. The rotating flange squeezes the shaft lock pin on one side, so that the shaft lock pin moves synchronously, while the shaft lock pin on the other side is separated from the flange under the action of the static short pin and gradually approaches the raised part. Since the spacing width between the pin groove and the shaft lock protective sleeve is reduced, when the shaft lock pin reaches the locking position, the shaft lock pin is squeezed between the shaft lock cam and the shaft lock protective sleeve, and friction locks, so that the shaft lock cam cannot rotate, resulting in a shaft locking effect. At this time, the output spindle can output power manually stably;

[0062] Moreover, since the reducer is often coated with lubricating oil, under the action of the lubricating oil, the shaft locking pin on the other side of the flange is often adsorbed in the pin groove and cannot effectively approach the raised part to produce a shaft locking effect. At this time, the short pin can push the shaft locking pin out, so that the shaft locking pin approaches the raised part, promoting the shaft locking effect, which can effectively ensure the stable occurrence of the shaft locking effect and avoid shaft locking failure.

[0063] Embodiment 5

[0064] The present embodiment is a power tool transmission mechanism with a shaft locking function, wherein the number of the transmission planetary gears constituting the transmission planetary gear set is at least 2, the number of the flanges is at least 3, the number of the corresponding shaft locking pins is at least 6, the number ratio of the flanges to the shaft locking pins is 1:2, and the long pins and the short pins correspond to the flanges one by one and are the same in number;

[0065] The number of flanges can be adjusted according to actual conditions, provided that the effective movement of the shaft lock pin is guaranteed. Properly increasing the number of flanges, long pins and short pins can effectively improve the response speed and stability of the shaft lock performance.

[0066] Embodiment 6

[0067] The present embodiment provides an electric tool transmission mechanism with a shaft locking function, wherein the protrusion is in the shape of an isosceles trapezoid, so that the width of the spacing between the pin groove and the shaft locking protective sleeve is smoothly reduced, which can effectively reduce the wear of the shaft locking pin and increase its service life.

[0068] To sum up, the electric tool transmission mechanism with shaft locking function of the present invention is used for power transmission of electric tools, mainly for electric screwdrivers, electric screwdrivers and other electric tools. It has a simple structure and reasonable design. It can increase the torque and have a shaft locking effect, so that the electric tool using the present invention has manual and automatic functions. At the same time, the shaft locking cam combines the long pin and the short pin to control the movement of the shaft locking pin, which can effectively ensure the stable occurrence of the shaft locking effect, avoid shaft locking failure, and is more stable to use.

[0069] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A power tool transmission mechanism with a shaft locking function, characterized in that: It includes a motor, a transmission mechanism and an output spindle; The motor is connected to the transmission mechanism for power output; The transmission mechanism is composed of a reduction gearbox and an axial locking device. The reduction gearbox is a planetary gear reduction box, which is used for receiving and transmitting power and can be self-locking. The output spindle is connected to the axial locking device, receives the power transmitted by the axial locking device, is used to connect to the electric tool head, and outputs work; The reduction gearbox includes a speed change internal gear sleeve, an input gear and a transmission planetary gear, and the axial locking device includes a shaft lock protective sleeve, a shaft lock cam, a shaft lock pin and a shaft lock intermediate piece; The speed change inner gear sleeve is in the shape of a cylindrical tube sleeve, and a circle of inner teeth distributed in an annular manner is provided on its inner wall. One end of the speed change inner gear sleeve is clamped with a limit buckle plate, and the other end is fixedly connected to the shaft lock protective sleeve. The transmission planetary gear is arranged in the speed change inner gear sleeve, and includes a gear plate and a first transmission gear. The gear plate is in the shape of a disc, and a first rotating shaft is provided on one side of the disc, and a transmission rotating tooth is provided on the other side. There are multiple first rotating shafts, and the multiple first rotating shafts are uniformly distributed circumferentially around the central axis of the gear plate. The first transmission gear corresponds to the first rotating shaft one by one, and is rotatably arranged on the first rotating shaft through a bearing, and its outer side is meshed with the inner teeth on the inner wall of the speed change inner gear sleeve, and the central axis of the transmission rotating tooth is consistent with the central axis of the gear plate; A circle of annular bosses are arranged inside the shaft lock protective sleeve, and the shaft lock cam, shaft lock pin and shaft lock middle piece are arranged in the shaft lock protective sleeve through the bosses. The shaft lock middle piece is disc-shaped, and a second rotating shaft is arranged on one side thereof, and a long pin and a short pin are arranged on the other side. There are multiple second rotating shafts, and the multiple second rotating shafts are evenly distributed circumferentially around the central axis of the shaft lock middle piece. The second rotating shaft extends into the speed change internal gear sleeve, and a second transmission gear is installed on it through a bearing. An output shaft is arranged in the middle of the shaft lock cam, and a flange is arranged on the edge. There are multiple flanges, and the multiple flanges are circumferentially uniform around the center of the shaft lock cam. Both sides of the flanges are pin grooves. A protrusion is arranged between adjacent flanges. The protrusion extends in the direction of the pin groove so that the spacing width between the pin groove and the shaft lock protective sleeve gradually decreases. The shaft lock pin is cylindrical, arranged at the pin groove, and protrudes from the flange surface. The number of the long pins and the short pins is the same, and they are circumferentially uniform and spaced. The long pin extends into the gap between the adjacent flanges, and the short pin is arranged at the flange and is located between the shaft lock pins on both sides of the flange. The input gear is fixedly connected to the transmission shaft of the motor, passes through the limiting buckle plate, and meshes with the inner side of the first transmission gear. The transmission rotating gear meshes with the inner side of the second transmission gear. The outer side of the second transmission gear meshes with the inner tooth mouth on the inner wall of the speed change internal gear sleeve. The output main shaft is fixedly connected to the axial locking device through the output shaft.

2. The electric tool transmission mechanism with shaft locking function according to claim 1, characterized in that: The reduction gearbox is connected to the motor transmission, receives the power input by the motor, and outputs it to the axial locking device after gear transmission and torque increase; the axial locking device receives the power transmitted by the reduction gearbox and transmits it to the output main shaft, and at the same time, self-locks after losing power.

3. The electric tool transmission mechanism with shaft locking function as claimed in claim 2, characterized in that: There are multiple transmission planetary gears, and multiple transmission planetary gears constitute a transmission planetary gear set. The first transmission gear on adjacent transmission planetary gears is meshed with the transmission rotating teeth. The transmission planetary gear at one end of the transmission planetary gear set is meshed with the input gear through the first transmission gear, and the other end is meshed with the inner side of the second transmission gear through the transmission rotating teeth to achieve transmission.

4. The electric tool transmission mechanism with shaft locking function as claimed in claim 3, characterized in that: The working modes of the electric tool transmission mechanism include automatic mode and manual mode, and it has a manual-automatic integrated function.

5. The electric tool transmission mechanism with shaft locking function as claimed in claim 4, characterized in that: Automatic mode: The motor is driven by an external power source, and works through the input gear to the transmission planetary gear in the reduction gearbox, driving the first transmission gear to rotate. The rotating first transmission gear meshes with the internal teeth in the speed change internal gear sleeve, and the speed change internal gear sleeve is fixed. The first transmission gear drives the gear plate to rotate in the speed change internal gear sleeve. The rotating gear plate drives the second transmission gear to rotate through the transmission gear, and then drives the shaft lock middle piece to rotate; the rotating shaft lock middle piece drives the long pin and short pin on it to rotate synchronously, and the long pin pushes the shaft lock pin on one side of the flange to the pin groove and pushes the shaft lock cam to rotate. The rotating short pin will not push the shaft lock pin to the locking position; the rotating shaft lock cam causes the output shaft to rotate, driving the output spindle to rotate, and then power output is performed; Manual mode: The motor has no external power supply and is not driven. The output spindle is subjected to external force and is transmitted to the axial locking device. At this time, the output shaft drives the shaft lock cam to rotate, and then drives the flange to rotate. The rotating flange squeezes the shaft lock pin on one side, causing the shaft lock pin to move synchronously, while the shaft lock pin on the other side is separated from the flange under the action of the static short pin and gradually approaches the raised part. Due to the reduction in the spacing width between the pin groove and the shaft lock protective sleeve, when the shaft lock pin reaches the locking position, the shaft lock pin is squeezed between the shaft lock cam and the shaft lock protective sleeve, frictionally locked, so that the shaft lock cam cannot rotate, resulting in a shaft locking effect. At this time, the output spindle can stably output power manually.

6. The electric tool transmission mechanism with shaft locking function as claimed in claim 5, characterized in that: The number of the transmission planetary gears constituting the transmission planetary gear set is at least 2.

7. The electric tool transmission mechanism with shaft locking function as claimed in claim 6, characterized in that: The number of the flanges is at least 3, and the number of the corresponding shaft locking pins is at least 6, and the ratio of the number of flanges to the number of shaft locking pins is 1:

2.

8. The electric tool transmission mechanism with shaft locking function as claimed in claim 7, characterized in that: The long pins and short pins correspond to the flanges one by one and have the same number.

9. The electric tool transmission mechanism with shaft locking function as claimed in claim 8, characterized in that: The raised portion is in an isosceles trapezoidal shape.

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