A motor drive transmission mechanism

Abstract

The application relates to a rudder control technology field, in particular to a motor-driven transmission mechanism, which comprises a pin shaft device, the pin shaft device comprises a first pin shaft assembly and a second pin shaft assembly, the first pin shaft assembly is provided with a first pin shaft, the second pin shaft assembly is provided with a second pin shaft, the first pin shaft axis and the second pin shaft axis are arranged in space vertically, the first pin shaft axis extends horizontally along the front-back direction, and the second pin shaft axis extends horizontally along the left-right direction; the first pin shaft is provided with a first groove and a second groove which are vertically downwardly opened on the outer circumference, the second pin shaft is provided with a first protruding part; when the first protruding part is located in the first groove or the second groove, the first pin shaft stops moving in the front-back direction; when the first protruding part is away from the first groove or the second groove, the first pin shaft moves in the front-back direction, the state switching of the unlocking and the locking of the transmission mechanism is realized, and the transmission mechanism has the advantages of high reliability, quick response, low power consumption and the like.

Description

Technical Field

[0001] This invention relates to the field of servo control technology, and more specifically, to a motor-driven transmission mechanism. Background Technology

[0002] A servo motor is the actuator of a flight system, driving control surfaces to move according to system commands, thereby controlling the aircraft's attitude. The servo motor needs to be locked before flight; during flight, the control surfaces must first be unlocked and maintained in the unlocked state until the flight mission is completed. The servo motor mechanism uses a motor drive, which converts the motor's rotational motion into the control surface's rotational motion through a gear and ball screw transmission system. A common locking / unlocking mechanism uses an electromagnetic pin, which brakes the control surface's transmission gear. When locked, the electromagnetic pin is de-energized, and a spring pushes the pin to extend, blocking the transmission gear. When unlocked, the electromagnetic pin is energized, and the electromagnetic attraction pulls the pin out of the transmission gear, unlocking the aircraft.

[0003] However, the electromagnetic pin driven locking and unlocking mechanism generates continuous heat when the electromagnetic pin is in the engaged state. Due to the long flight time, the electromagnetic pin consumes a lot of power and generates a lot of heat during continuous operation, which restricts the implementation of the solution. Summary of the Invention

[0004] To address the issues of high power consumption and severe heat generation caused by the continuous operation of electromagnetic pins during long flight times, this invention provides a motor-driven transmission mechanism, including a pin assembly. The pin assembly comprises a first pin assembly and a second pin assembly. The first pin assembly has a first pin, and the second pin assembly has a second pin. The axes of the first and second pins are spatially perpendicular. The first pin axis extends horizontally in the front-rear direction, and the second pin axis extends horizontally in the left-right direction. The outer circumference of the first pin has a first groove and a second groove with vertically downward openings. The second pin has a first protrusion. When the first protrusion is located within the first or second groove, the first pin stops moving in the front-rear direction. When the first protrusion moves away from the first or second groove, the first pin moves in the front-rear direction.

[0005] In some embodiments, the motor drive transmission mechanism further includes a support device, the support device being provided with the pin device, the support device including a support base and a baffle, the right side of the support base and the left side of the baffle being fixedly connected.

[0006] In some embodiments, the first pin and the bracket are slidably connected, and the rear end of the first pin has a second protrusion extending in a direction perpendicular to the axis of the first pin, the second protrusion being located outside the rear side of the bracket.

[0007] In some embodiments, the first pin assembly includes a first spring, the rear end of the first spring abutting against the front side of the second protrusion, and the front end of the first spring abutting against the rear side of the bracket.

[0008] In some embodiments, the second pin and the baffle are slidably connected, and a third protrusion is provided at a position away from the right end of the second pin and the first protrusion. The third protrusion extends in a direction perpendicular to the axis of the second pin, and the left side of the baffle has a fourth protrusion extending to the left.

[0009] In some embodiments, the second pin assembly includes a second spring, the left end of which abuts against the right side of the third protrusion, the second spring being sleeved on the fourth protrusion, and the right end of which abuts against the left side of the baffle.

[0010] In some embodiments, the motor drive transmission mechanism further includes a cam device and a motor. The cam device includes a first cam assembly and a second cam assembly. The first cam assembly includes a first gear, and the second cam assembly includes a second gear. The first gear and the second gear mesh, and the motor drives the first cam assembly to rotate.

[0011] In some embodiments, the first cam assembly includes a first cam, a second groove is disposed near the front end of the first pin in the direction of the first pin axis, a third pin is disposed between the second groove and the front end of the first pin, the axis of the third pin is perpendicular to the axis of the first pin, a bearing is disposed at the top of the third pin, and the first cam and the outer circumferential surface of the bearing abut against each other.

[0012] In some embodiments, the first cam and the first gear are coaxially arranged, with the first cam located below the lower end face of the first gear.

[0013] In some embodiments, the second cam assembly includes a second cam, and the left end face of the second cam abuts against the second pin.

[0014] In some embodiments, the second cam and the second gear are coaxially arranged, with the second cam located below the lower end face of the second gear.

[0015] In some embodiments, the first pin assembly is provided with a first spring plate limit switch, and the second pin assembly is provided with a second spring plate limit switch. Both the first spring plate limit switch and the second spring plate limit switch can send signals to control the motor to start or stop.

[0016] To address the issues of high power consumption and severe heat generation caused by the continuous operation of electromagnetic pins during long flight times, this invention provides a motor-driven transmission mechanism, including a pin assembly. The pin assembly comprises a first pin assembly and a second pin assembly. The first pin assembly has a first pin, and the second pin assembly has a second pin. The axes of the first and second pins are spatially perpendicular. The first pin axis extends horizontally in the front-rear direction, and the second pin axis extends horizontally in the left-right direction. The outer circumference of the first pin has a first groove and a second groove with vertically downward openings. The second pin has a first protrusion. When the first protrusion is located within the first or second groove, the first pin stops moving in the front-rear direction. When the first protrusion moves away from the first or second groove, the first pin moves in the front-rear direction. Linear movement is achieved through two mutually perpendicular pins, with the second pin acting as a locking shaft to restrict the linear movement of the first pin. When the first protrusion of the second pin is located within the first or second groove of the first pin, the first pin is locked by the second pin, and its front-rear movement stops. When the first protrusion of the second pin moves away from the first or second groove of the first pin, the first pin can move in the front-back direction. By mechanically locking the first and second pins, the transmission mechanism can switch between unlocked and locked states. The transmission mechanism has advantages such as high reliability, fast response, and low power consumption. Attached Figure Description

[0017] Figure 1 A perspective view of a motor-driven transmission mechanism is shown;

[0018] Figure 2 A partial cross-sectional view of a motor-driven transmission mechanism is shown.

[0019] Figure 3 A perspective view of a motor-driven transmission mechanism omitting the support structure is shown;

[0020] Figure 4 A top view of a motor-driven transmission mechanism with an omitted support structure is shown;

[0021] Figure 5 A bottom view of a motor-driven transmission mechanism with the support structure omitted is shown;

[0022] Figure 6 A perspective view of the first pin shaft of a motor-driven transmission mechanism is shown.

[0023] Figure 7 A perspective view of the second pin shaft of a motor-driven transmission mechanism is shown.

[0024] Figure 8 A perspective view of a second cam assembly of a motor-driven transmission mechanism is shown;

[0025] Figure 9 A first cam assembly and a motor perspective view of a motor-driven transmission mechanism are shown;

[0026] Figure 10 A schematic diagram of the motion of the first pin and the second pin relative to their respective cam rotation angles is shown.

[0027] Reference numerals in the attached drawings: 01 Pin assembly, 111 First pin, 1111 First groove, 1112 Second groove, 1113 Second protrusion, 112 First spring, 113 Third pin, 1131 Bearing, 114 First spring plate limit switch, 121 Second pin, 1211 First protrusion, 1212 Third protrusion, 122 Second spring, 123 Second spring plate limit switch, 02 Bracket assembly, 21 Bracket seat, 22 Baffle, 221 Fourth protrusion, 03 Cam assembly, 31 First cam assembly, 311 First gear, 312 First cam, 32 Second cam assembly, 321 Second gear, 322 Second cam, 04 Motor. Detailed Implementation

[0028] The present disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present disclosure, and are not intended to imply any limitation on the scope of the disclosure.

[0029] As used herein, the term "comprising" and its variations are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "at least partially based on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment". The term "another embodiment" is to be interpreted as "at least one other embodiment". The terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments and are not intended to limit the indicated devices, elements, or components to having a specific orientation or being constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientations or positional relationships; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances. In addition, the terms "installed", "set up", "equipped with", "connected", and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, elements, or components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. Furthermore, the terms "first," "second," etc., are mainly used to distinguish different devices, elements, or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0030] This embodiment discloses a motor-driven transmission mechanism, such as... Figure 1 , 2As shown in Figures 6 and 7, a pin assembly 01 is included. The pin assembly 01 includes a first pin assembly (not shown) and a second pin assembly (not shown). The first pin assembly has a first pin 111, and the second pin assembly has a second pin 121. The axes of the first pin 111 and the second pin 121 are arranged vertically in space. The axis of the first pin 111 extends horizontally in the front-back direction, and the axis of the second pin 121 extends horizontally in the left-right direction. The outer circumference of the first pin 111 has a first groove 1111 and a second groove 1112 with vertically downward openings. The second pin 121 has a first protrusion 1211. When the first protrusion 1211 is located in the first groove 1111 or the second groove 1112, the first pin 111 stops moving in the front-back direction. When the first protrusion 1211 moves away from the first groove 1111 or the second groove 1112, the first pin 111 moves in the front-back direction.

[0031] In this embodiment, linear motion is achieved through two mutually perpendicular pins. The second pin 121 acts as a locking pin, restricting the linear motion of the first pin 111. When the first protrusion 1211 of the second pin 121 is located within the first groove 1111 or the second groove 1112 of the first pin 111, the first pin 111 is locked by the second pin 121, and the first pin 111 stops moving in the front-back direction. When the first protrusion 1211 of the second pin 121 moves away from the first groove 1111 or the second groove 1112 of the first pin 111, the first pin 111 moves in the front-back direction. By mechanically locking the first pin 111 and the second pin 121, the transmission mechanism achieves the switching between unlocked and locked states. The transmission mechanism has advantages such as high reliability, fast response, and low power consumption.

[0032] In this embodiment, the first pin 111 has a first groove 1111 and a second groove 1112 with a vertically downward opening on the outer circumference of the first pin 111, and the second pin 121 has a first protrusion 1211. Through the reciprocating motion of the second pin 121, the motion of the first pin 111 is realized to meet the needs of the transmission mechanism.

[0033] In some embodiments, such as Figure 1 and 2 As shown, the motor drive transmission mechanism also includes a support device 02, which is equipped with a pin device 01. The support device 02 includes a support base 21 and a baffle 22, with the right side of the support base 21 and the left side of the baffle 22 fixedly connected.

[0034] In this embodiment, the bracket device 02 is used to fix and support the pin device 01, providing a plane for fixing and supporting the pin device 01.

[0035] In this embodiment, the support device 02 is formed by the fixed connection between the right side of the support base 21 and the left side of the baffle 22. The support device 02 has a cavity inside, which accommodates a portion of the pin device 01.

[0036] In some embodiments, such as Figure 2 and 6 As shown, the first pin 111 and the bracket 21 are slidably connected. The rear end of the first pin 111 has a second protrusion 1113 extending vertically along the axis of the first pin 111. The second protrusion 1113 is located outside the rear side of the bracket 21.

[0037] In this embodiment, by setting the first pin 111 in the cavity inside the bracket 21, the first pin 111 slides along the cavity of the bracket 21, thereby realizing the movement of the first pin 111 in the front-back horizontal direction and preventing the first pin 111 from deviating.

[0038] In this embodiment, the second protrusion 1113 extends vertically along the axis of the first pin 111. The outer diameter of the second protrusion 1113 is larger than the cavity diameter of the bracket 21. The second protrusion 1113 is located outside the rear side of the bracket 21. The rear side of the bracket 21 prevents the second protrusion 1113 from entering the cavity of the bracket 21, thus limiting the forward movement distance of the first pin 111.

[0039] In some embodiments, such as Figure 4 and 5 As shown, the first pin assembly includes a first spring 112, the rear end of the first spring 112 abuts against the front side of the second protrusion 1113, and the front end of the first spring 112 abuts against the rear side of the bracket 21.

[0040] In this embodiment, the first spring 112 is fitted onto the first pin 111, with its rear end abutting against the front side of the second protrusion 1113 and its front end abutting against the rear side of the bracket 21. This ensures that the compression and elongation direction of the first spring 112 is the same as the movement direction of the first pin 111. When the first pin 111 moves forward, the distance between the second protrusion 1113 and the bracket 21 decreases, and the first spring 112 is compressed. When the first spring 112 is compressed, and the first pin 111 moves backward, the first spring 112 provides assistance for the backward movement of the first pin 111, reducing the system's energy consumption.

[0041] In some embodiments, such as Figure 2 As shown, the second pin 121 and the baffle 22 are slidably connected. A third protrusion 1212 is located at a position away from the right end of the second pin 121 and between the first protrusion 1211. The third protrusion 1212 extends vertically along the axis of the second pin 121. The left side of the baffle 22 has a fourth protrusion 221 extending to the left.

[0042] In this embodiment, a second pin 121 is disposed in a cavity in the baffle 22. The second pin 121 slides within the cavity of the baffle 22, thereby enabling the second pin 121 to move in the left and right horizontal directions.

[0043] In this embodiment, the third protrusion 1212 extends vertically along the axis of the second pin 121. The outer diameter of the third protrusion 1212 is larger than the inner diameter of the fourth protrusion 221. The third protrusion 1212 is located outside the surface of the fourth protrusion 221. The fourth protrusion 221 blocks the third protrusion 1212 from entering the cavity of the baffle 22, thus limiting the leftward movement distance of the second pin 121.

[0044] In some embodiments, such as Figure 2 , 3 As shown in Figures 4 and 5, the second pin assembly includes a second spring 122. The left end of the second spring 122 abuts against the right side of the third protrusion 1212. The second spring 122 is sleeved on the fourth protrusion 221. The right end of the second spring 122 abuts against the left side of the baffle 22.

[0045] In this embodiment, the second spring 122 is fitted onto the fourth protrusion 221, with its left end abutting against the right side of the third protrusion 1212 and its right end abutting against the left side of the baffle 22. This ensures that the compression and elongation direction of the second spring 122 is the same as the movement direction of the second pin 121. When the second pin 121 moves to the right, the distance between the third protrusion 1212 and the baffle 22 decreases, and the second spring 122 is compressed. When the second spring 122 is compressed, and the second pin 121 moves to the left, the second spring 122 provides assistance for the leftward movement of the second pin 121, reducing the system's energy consumption.

[0046] In some embodiments, such as Figure 1 , 2 As shown in Figures 6 and 7, the motor-driven transmission mechanism also includes a cam device 03 and a motor 04. The cam device 03 includes a first cam assembly 31 and a second cam assembly 32. The first cam assembly 31 includes a first gear 311, and the second cam assembly 32 includes a second gear 321. The first gear 311 and the second gear 321 mesh, and the motor 04 drives the first cam assembly 31 to rotate.

[0047] In this embodiment, the cam device 03 is used to transmit the torque of the motor 04. When the motor 04 drives the cam device 03 to rotate, the cam device 03 drives the first pin 111 and the second pin 121 to move.

[0048] In this embodiment, the motor 04 is used to provide power and is fixedly connected to the cam device 03 to drive the cam device 03 to move.

[0049] In this embodiment, motor 04 drives the first cam assembly 31 to rotate, and the first cam assembly 31 drives the second cam assembly 32 to rotate.

[0050] In this embodiment, the output shaft of motor 04 rotates, which drives the first gear 311 to rotate, and the first gear 311 drives the second gear 321 to rotate, thereby realizing the rotation of the first cam assembly 31 and the second cam assembly 32. The first cam assembly 31 drives the first pin 111 to move back and forth, and the second cam assembly 32 drives the second pin 121 to move left and right.

[0051] In some embodiments, such as Figure 2 , 6 As shown in Figure 9, the first cam assembly 31 includes a first cam 312, a second groove 1112 is provided near the front end of the first pin 111 along the axial direction of the first pin 111, a third pin 113 is provided between the second groove 1112 and the front end of the first pin 111, the axis of the third pin 113 is perpendicular to the axis of the first pin 111, a bearing 1131 is provided on the top of the third pin 113, and the outer circumferential surface of the first cam 312 and the bearing 1131 abuts against each other.

[0052] In this embodiment, the first cam 312 has a first lead portion, a second lead portion, and a third lead portion. When the first cam 312 contacts the bearing 1131 at the top of the third pin 113, since the first cam 312 has different leads, when the first cam 312 rotates, the first cam 312 pushes the follower bearing 1131 to move back and forth. The bearing 1131 drives the third pin 113 to move back and forth. The third pin 113 is set on the first pin 111, so that the first pin 111 can move in the back and forth direction.

[0053] In this embodiment, the bearing 1131 is used to abut against the first cam 312 to reduce the friction between the first pin 111 and the first cam 312 and extend the service life of the first pin 111.

[0054] In some embodiments, such as Figure 2 and 9 As shown, the first cam 312 and the first gear 311 are coaxially arranged, with the first cam 312 located below the lower end face of the first gear 311.

[0055] In this embodiment, the first cam 312 and the first gear 311 are fixed on a pin. When the first gear 311 rotates, the first gear 311 drives the pin to rotate, and the pin drives the first cam 312 to rotate.

[0056] In this embodiment, the first cam 312 and the first gear 311 are coaxially arranged, with the first cam 312 located below the lower end face of the first gear 311, thereby optimizing the spatial arrangement of the cam device 03 and saving space.

[0057] In some embodiments, such as Figure 2 and 8 As shown, the second cam assembly 32 includes a second cam 322, which abuts against the left end face of the second pin 121.

[0058] In this embodiment, the second cam 322 has a fourth lead portion, a fifth lead portion, a sixth lead portion and a seventh lead portion. When the second cam 322 abuts against the left end face of the second pin 121, since the second cam 322 has different leads, when the second cam 322 rotates, the second cam 322 pushes the follower second pin 121 to move left and right, so that the second pin 121 moves in the left and right direction.

[0059] In some embodiments, the second cam 322 and the second gear 321 are coaxially arranged, with the second cam 322 located below the lower end face of the second gear 321.

[0060] In this embodiment, the second cam 322 and the second gear 321 are fixed on a pin. When the second gear 321 rotates, the second gear 321 drives the pin to rotate, and the pin drives the second cam 322 to rotate.

[0061] In this embodiment, the second cam 322 and the second gear 321 are coaxially arranged, with the second cam 322 located below the lower end face of the second gear 321, thereby optimizing the spatial arrangement of the cam device 03 and saving space.

[0062] In this embodiment, the output shaft of motor 04 rotates, driving the first gear 311 to rotate. When the first gear 311 rotates, it drives the pin to rotate, which in turn drives the first cam 312 to rotate. The first cam 312 pushes the driven bearing 1131 to move back and forth, which in turn drives the third pin 113 to move back and forth. The third pin 113 is mounted on the first pin 111, enabling the first pin 111 to move in the back and forth direction. The first gear 311 drives the second gear 321 to rotate, which in turn drives the pin to rotate. The pin drives the second cam 322 to rotate, which in turn pushes the driven second pin 121 to move left and right, enabling the second pin 121 to move in the left and right direction. This achieves reciprocating linear motion of the two mutually perpendicular pins.

[0063] In some embodiments, the first pin assembly is provided with a first spring plate limit switch 114, and the second pin assembly is provided with a second spring plate limit switch 123. Both the first spring plate limit switch 114 and the second spring plate limit switch 123 can send signals to control the motor 04 to start or stop.

[0064] In this embodiment, the position information of the pin is fed back by the spring plate limit switch, so that the motor 04 can start or stop according to the position of the pin.

[0065] In this embodiment, the output shaft of motor 04 rotates, driving the first gear 311 to rotate. When the first gear 311 rotates, it drives the pin to rotate, which in turn drives the first cam 312 to rotate. The first cam 312 pushes the driven bearing 1131 to move back and forth, which in turn drives the third pin 113 to move back and forth. The third pin 113 is mounted on the first pin 111, enabling the first pin 111 to move in the back-and-forth direction. The first gear 311 drives the second gear 321 to rotate, which in turn drives the pin to rotate. The pin then drives the second cam 322 to rotate, which in turn pushes the driven second pin 121 to move left and right, enabling the second pin 121 to move in the left and right direction. The first pin 111 is mounted in the bracket 21, which limits the first pin 111. The first spring 112 is fitted onto the first pin 111 to provide assistance for its backward movement. The second pin 121 is installed in the baffle 22, which limits the second pin 121. A second spring 122 is installed between the baffle 22 and the second pin 121 to provide assistance for the second pin 121 to move to the left. A first spring plate limit switch 114 is installed on the first pin 111, and a second spring plate limit switch 123 is installed on the second pin 121. The first spring plate limit switch 114 and the second spring plate limit switch 123 are used to determine the positions of the first pin 111 and the second pin 121, respectively, and feed back the position information through signals to control the start or stop of the motor 04.

[0066] In this embodiment, the transmission ratio of the first gear 311 and the second gear 321 is 1:1. The rotation of the gears drives the cams fixed to each gear to rotate, thereby pushing the first pin 111 and the second pin 121 to move linearly. When the movement reaches a certain position, the first spring plate limit switch 114 and the second spring plate limit switch 123 send the position information back to control the start and stop of the drive motor 04 through signals, realizing the automatic unlocking and locking of the transmission mechanism.

[0067] During operation, the movement of the first pin 111 and the second pin 121 relative to their respective cam rotation angles is as follows: Figure 10As shown. When the first cam 312 and the second cam 322 begin to rotate, the lead of the second cam 322 starts from its minimum and gradually increases. The second pin 121 begins to move to the right from its leftmost end, the first protrusion 1211 moves within the first groove 1111, and the first pin 111 stops moving in the front-back direction. When the second cam 322 rotates 90°, the first protrusion 1211 moves away from the first groove 1111, the lead of the first cam 312 increases from its minimum, the first pin 111 moves forward, the lead of the second cam 322 remains unchanged, and the second pin 121 remains stationary. When the second cam 322 rotates 180°, the lead of the second cam 322 is at its minimum, and the second pin 121 returns to its initial position. The first protrusion 1211 moves within the second groove 1112, and the first pin 111 stops moving in the front-back direction. When the second cam 322 rotates 270°, the lead of the first cam 312 decreases from its maximum, the first pin 111 moves backward, the lead of the second cam 322 remains unchanged, and the second pin 121 remains stationary until the second cam 322 rotates 360°. After that, the lead of the second cam 322 gradually increases from its minimum, the second pin 121 starts moving to the right from its leftmost end, the first protrusion 1211 moves within the first groove 1111, and the first pin 111 stops moving in the front-back direction. The first pin 111 and the second pin 121 reciprocate.

[0068] In this embodiment, the locking and unlocking mechanisms operate mechanically, exhibiting high reliability and unaffected by time. The power consumption required for operation is very low, making it highly suitable for weapon systems operating for extended periods.

[0069] Those skilled in the art will understand that the above embodiments are specific examples of implementing this disclosure, and in practical applications, various changes can be made in form and detail without departing from the spirit and scope of this disclosure.

Claims

1. An electric motor drive transmission mechanism, characterised in that, The pin shaft device comprises a first pin shaft assembly and a second pin shaft assembly, the first pin shaft assembly has a first pin shaft, the second pin shaft assembly has a second pin shaft, the first pin shaft axis and the second pin shaft axis are arranged vertically in space, the first pin shaft axis extends horizontally in the front-rear direction, and the second pin shaft axis extends horizontally in the left-right direction; the first pin shaft has a first groove and a second groove which are vertically downwardly open on the outer circumference of the first pin shaft, and the second pin shaft has a first protruding part; when the first protruding part is located in the first groove or the second groove, the first pin shaft stops moving in the front-rear direction; when the first protruding part is away from the first groove or the second groove, the first pin shaft moves in the front-rear direction. The motor drive transmission mechanism further comprises a cam device and a motor, the cam device comprises a first cam assembly and a second cam assembly, the first cam assembly comprises a first gear, the second cam assembly comprises a second gear, the first gear and the second gear are engaged, and the motor drives the first cam assembly to rotate. The first cam assembly comprises a first cam, the second groove is arranged close to the front end of the first pin shaft in the direction of the first pin shaft axis, a third pin shaft is arranged between the second groove and the front end of the first pin shaft, the third pin shaft axis is perpendicular to the first pin shaft axis, a bearing is arranged on the top of the third pin shaft, and the first cam and the outer circumferential surface of the bearing abut. The second cam assembly comprises a second cam, and the second cam and the left end surface of the second pin shaft abut.

2. The motor drive transmission of claim 1, wherein, The motor drive transmission mechanism further comprises a support device, the support device is provided with the pin shaft device, and the support device comprises a support seat and a baffle.

3. The motor drive transmission of claim 2, wherein, The first pin shaft and the support seat are in sliding connection, the rear end of the first pin shaft has a second protruding part which extends vertically along the first pin shaft axis, and the second protruding part is located outside the rear side surface of the support seat.

4. The motor drive transmission of claim 3, wherein, The first pin shaft assembly comprises a first spring, the rear end of the first spring and the front side surface of the second protruding part abut, and the front end of the first spring and the rear side surface of the support seat abut.

5. The motor drive transmission of claim 2, wherein, The second pin shaft and the baffle are in sliding connection, a third protruding part which extends vertically along the second pin shaft axis is arranged between the position away from the right end of the second pin shaft and the first protruding part, and the left side surface of the baffle has a fourth protruding part which extends leftward.

6. The motor drive transmission of claim 5, wherein, The second pin shaft assembly comprises a second spring, the left end of the second spring and the right side surface of the third protruding part abut, the second spring is sleeved on the fourth protruding part, and the right end of the second spring and the left side surface of the baffle abut.

7. The motor drive transmission of claim 1, wherein, The first cam and the first gear are coaxially arranged, and the first cam is located below the lower end surface of the first gear.

8. The motor drive transmission of claim 1, wherein, The second cam and the second gear are coaxially arranged, and the second cam is located below the lower end surface of the second gear.

9. An electric motor drive transmission as claimed in any one of claims 1 to 8, wherein, The first pin shaft assembly is provided with a first spring sheet limit switch, and the second pin shaft assembly is provided with a second spring sheet limit switch, both of which can send signals to control the start or stop of the motor.

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