Transmission apparatus having clutch and differential functions

Abstract

A transmission apparatus having clutch and differential functions. The transmission apparatus comprises a housing portion (1). The housing portion (1) comprises a clutch unit (3) for use in an output shaft (2) or output shaft sections (2A, 2B). The clutch unit (3) is configured such that, when the output shaft (2) or the output shaft sections (2A, 2B) are in an inserted state within the housing portion (1) and when the housing portion (1) is in a closed state, the clutch unit drives the output shaft (2) or the output shaft sections (2A, 2B) to rotate synchronously in one direction within the housing portion (1) with the output shaft (2) or the output shaft sections (2A, 2B) serving as the axis. The clutch unit (3) can be activated when the housing portion (1) is in the closed state. In the closed state, the clutch unit (3) can be activated such that the transmission apparatus can freely switch between a state in which the clutch unit (3) rotates synchronously with the output shaft (2) or the output shaft sections (2A, 2B) in one direction and a state in which the output shaft (2) or the output shaft sections (2A, 2B) rotates freely.

Description

Transmission device with clutch and differential functions Technical Field

[0001] This invention relates to the field of transmission equipment technology, and in particular to a transmission device with clutch and differential functions. Background Technology

[0002] A lawnmower, also known as a lawn mower or lawn trimmer, consists of mowing blades, a motor, a walking mechanism, a handle, and a control unit. It can be divided into push lawnmowers and self-propelled lawnmowers. The walking mechanism of a lawnmower includes axles with rollers mounted on them. A push lawnmower is manually pushed, where the operator pushes the machine to rotate the rollers and move it. A self-propelled lawnmower is automatically driven, with the rollers rotated by a motor or engine. The component on the lawnmower that enables automatic movement is called the self-propelled mechanism.

[0003] When a lawnmower is working, it needs to move automatically in some areas and be pushed manually in others. Therefore, an automatic clutch is required. The automatic clutch can adaptively engage and disengage according to changes in the motor's operating state, eliminating the need for manual clutch operation. This allows the lawnmower's self-propelled mechanism to automatically switch between two working modes: automatic walking mode and manual pushing mode.

[0004] Furthermore, the lawnmower needs to turn during automatic movement, and the speed difference between the inner and outer shafts requires the installation of a differential. It also needs to be able to turn flexibly during automatic movement.

[0005] If the self-propelled unit on a lawnmower needs to be able to turn flexibly and automatically switch between working modes, then a differential and an automatic clutch must be installed on the self-propelled unit. How to integrate the differential and automatic clutch into the self-propelled unit, enabling it to turn flexibly and switch between working modes automatically, while also maintaining a compact structure and ensuring stable and smooth operation in all working modes, is an urgent problem to be solved. Technical issues

[0006] The present invention aims to solve the above-mentioned defects and provide a transmission device with clutch and differential functions. Technical solutions

[0007] To overcome the deficiencies in the prior art, the technical solution adopted by the present invention to solve its technical problem is: a transmission device with clutch and differential functions, comprising a housing, wherein the housing includes at least two housing segments A and B assembled together in the closed state, at least one insertion hole A and B for entering the interior of the housing, and an output shaft, wherein the output shaft is inserted into the housing through the insertion holes A and B on the housing, and the output shaft is rotatably disposed within the housing, and the output shaft is configured to extend at least partially to the outside of the housing in both the inserted state and the closed state of the housing, the output shaft being composed of a single piece or at least two output shaft segments A and B. The housing also includes a clutch unit for the output shaft or the output shaft segments A and B. The clutch unit is used to drive the output shaft or the output shaft segments A and B to rotate synchronously in one direction around the output shaft or the output shaft segments A and B as the axis when the output shaft or the output shaft segments A and B are inserted into the housing and when the housing is closed. The clutch unit can be activated when the housing is closed. In the closed state, the clutch unit can be activated to freely switch between a state in which the clutch unit rotates synchronously with the output shaft or the output shaft segments A and B in one direction and a state in which the output shaft or the output shaft segments A and B rotate freely.

[0008] The clutch unit is configured such that, in the closed state of the housing, based on the position of the output shaft or output shaft segments A and B within the housing, the clutch unit drives the output shaft or output shaft segments A and B to perform a simple angular displacement in the opposite direction of synchronous rotation in one direction within the housing, with the output shaft or output shaft segments A and B as the axis, so as to switch from the state where the output shaft or output shaft segments A and B are synchronously rotated in one direction by the clutch unit to the state where the output shaft or output shaft segments A and B can rotate freely;

[0009] After the clutch unit performs a simple angular displacement in the direction that drives the output shaft or the output shaft segments A and B to rotate synchronously, the state of free rotation of the output shaft or the output shaft segments A and B is switched to the state in which the clutch unit drives the output shaft or the output shaft segments A and B to rotate synchronously in one direction.

[0010] Further improvements include using at least one of the clutch units on the output shaft.

[0011] Further improvements include the clutch unit comprising a rotary drive unit for transmitting power, a rotary driven unit coaxially rotatably connected to the rotary drive unit, and a limiting unit for non-locking the rotation of the rotary driven unit. The rotary drive unit, rotary driven unit, and limiting unit are configured to axially penetrate the output shaft or output shaft segments A and B, and the rotary drive unit and rotary driven unit are rotatably mounted on the output shaft or output shaft segments A and B. At least one connecting shaft parallel to the output shaft or output shaft segments A and B is connected to the rotary driven unit. The connecting shaft is rotatably connected to the locking unit after passing through a corresponding arc-shaped hole A on the rotary drive unit. The rotary drive unit drives the locking unit to perform a simple angular displacement. After the locking unit performs a simple displacement, it engages with the rotary part connected to the output shaft or the output shaft segments A and B, thereby causing the output shaft or the output shaft segments A and B to rotate synchronously with the rotary drive unit. The output shaft or the output shaft segments A and B then perform a simple angular displacement in the opposite direction to the synchronous rotation of the rotary drive unit, causing the rotary part to disengage from the locking unit, thereby allowing the output shaft or the output shaft segments A and B to rotate freely. The housing part restricts the limiting unit from rotating about the output shaft or the output shaft segments A and B as the axis.

[0012] Further improvements include the restriction unit preferably having a two-claw spring or a multi-claw spring.

[0013] Further improvements include the rotary drive unit comprising a gear ring portion B with one closed end and both internal and external teeth, and a protrusion C. The protrusion C is coaxially connected to the closed end of the gear ring portion B, and the arc-shaped segment hole A is located on the closed end face of the gear ring portion B. The rotary driven part is coaxially rotatably disposed on the protrusion C. The gear ring portion B is used to accommodate the rotating part and the locking part. The internal teeth of the gear ring portion B are used to drive the locking part to perform a simple angular displacement, thereby disengaging and engaging the locking part with the rotating part.

[0014] Further improvements include the locking part comprising a column A rotatably connected to the connecting shaft, the column A having a toothed area B that meshes with the inner teeth of the gear ring part B and a locking tooth C for engaging or disengaging with the rotating part, wherein when the gear ring part B rotates, it will cause the locking part to undergo a simple angular displacement, thereby engaging or disengaging the locking tooth C with the rotating part.

[0015] A further improvement includes the rotating part comprising a connecting post A and a locking protrusion B connected to the output shaft or the output shaft segments A and B. The connecting post A is provided with at least one locking protrusion B circumferentially. The locking protrusion B contacts the locking tooth C to restrict the connecting post A, thereby causing the output shaft or the output shaft segments A and B to rotate synchronously with the rotating drive part.

[0016] Further improvements include that the rotating parts on the output shaft segments A and B are rotatably connected by a mating pin, and that the output shaft segments A and B are on the same straight line.

[0017] Further improvements include the housing portion further including a motor arranged and supported by the housing portion and a transmission unit located within the housing portion, wherein the output end of the motor is connected to a clutch unit via a transmission mechanism to provide power to the output shaft or the clutch unit on the output shaft segment A or B.

[0018] Further improvements include the transmission unit comprising a driving rotary gear connected to the output end of the motor, a driven transmission part two, and at least one driven transmission part one, wherein the driven transmission part one and the driven transmission part two are rotatably disposed within the housing, and the driven transmission part one and the driven transmission part two are meshed together, the driving rotary gear meshes with the driven transmission part two, and the driven transmission part one meshes with a clutch unit on the output shaft or on the output shaft segments A and B.

[0019] Further improvements include the driven transmission part two comprising an internal gear ring A with one end closed and a connecting gear two B coaxially connected to the internal gear ring A; the driven transmission part one comprising a toothed column A and a connecting gear one B coaxially connected to the toothed column A; the internal teeth of the internal gear ring A meshing with the driving rotating gear; the connecting gear two B meshing with the connecting gear one B; and the toothed column A meshing with the clutch unit. Beneficial effects

[0020] The beneficial effects of this invention are: This design uses a clutch unit connected to the output shaft to realize the functions of differential speed and clutch, and completes the switching of working modes under different working conditions of the motor, and can make flexible turns in the working state. This design has a simple and compact structure and runs smoothly in various working modes; The clutch unit with a special structure integrates the clutch and differential together, wherein the clutch and differential are realized by the disengagement or engagement of the locking part and the rotating part. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Figure 1 is an axonometric view of the present invention;

[0023] Figure 2 is a front cross-sectional view of the present invention;

[0024] Figure 3 is an axonometric view of the driven transmission unit 1 in this invention;

[0025] Figure 4 is an axonometric view of the driven transmission unit 2 in this invention;

[0026] Figure 5 is an exploded view of the present invention;

[0027] Figure 6 is an isometric view of the rotary drive unit in this invention;

[0028] Figure 7 is an isometric view of the locking part in this invention;

[0029] Figure 8 is an isometric view of the rotating part in this invention;

[0030] Figure 9 is an isometric view of the clutch unit and output shaft assembly in this invention;

[0031] Figure 10 is a top view of the clutch unit and output shaft in this invention;

[0032] Figure 11 is a cross-sectional axonometric view of the present invention;

[0033] Figure 12 is a front cross-sectional view of the clutch unit in this invention;

[0034] In the diagram, 1-box body, 1A, 1B-box body sections, 2-output shaft, 2A, 2B-output shaft segments, 3-clutch unit 3, 4-driven transmission part one, 4A-toothed column, 4B-connecting gear one, 5-driven transmission part two, 5A-internal gear ring, 5B-connecting gear two, 6-drive rotating gear, 7-motor, 8-limiting unit, 9-rotation drive part, 9A-arc-shaped hole, 9B-gear ring part, 9C-protrusion, 10-locking part, 10A-column, 10B-toothed area, 10C-locking tooth, 11-connecting pin, 12-rotating part, 12A-connecting column, 12B-locking protrusion, 13-connecting shaft, 14-rotation driven part, 15A, 15B-insertion hole. Embodiments of the present invention

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] As shown in Figures 1, 2, 11, and 12, a transmission device with clutch and differential functions includes a housing 1. The housing 1 includes at least two housing segments 1A and 1B assembled together in the closed state, at least one insertion hole 15A and 15B for entering the interior of the housing 1, and an output shaft 2. The output shaft 2 is inserted into the housing 1 through the insertion holes 15A and 15B and is rotatably disposed within the housing 1. The output shaft 2 is configured to extend at least partially outside the housing 1 in both the inserted and closed states. The output shaft 2 is composed of a single piece or at least two output shaft segments 2A and 2B. The housing 1 also includes... The clutch unit 3 is used in the output shaft 2 or the output shaft segments 2A and 2B. The clutch unit 3 is used to drive the output shaft 2 or the output shaft segments 2A and 2B to rotate synchronously in one direction within the housing 1 with the output shaft 2 or the output shaft segments 2A and 2B as the axis when the housing 1 is in the inserted state and when the housing 1 is in the closed state. The clutch unit 3 can be activated when the housing 1 is in the closed state, and in the closed state, the clutch unit 3 can be activated to freely switch between the state in which the clutch unit 3 rotates synchronously with the output shaft 2 or the output shaft segments 2A and 2B in one direction and the state in which the output shaft 2 or the output shaft segments 2A and 2B rotate freely.

[0037] The clutch unit 3 is configured such that, in the closed state of the housing 1, depending on the position of the output shaft 2 or the output shaft segments 2A and 2B within the housing 1, the clutch unit 3 drives the output shaft 2 or the output shaft segments 2A and 2B to perform a simple angular displacement in the opposite direction of synchronous rotation in one direction within the housing 1, with the output shaft 2 or the output shaft segments 2A and 2B as the axis. This allows the state of synchronous rotation of the output shaft 2 or the output shaft segments 2A and 2B in one direction driven by the clutch unit 3 to switch to a state of free rotation of the output shaft 2 or the output shaft segments 2A and 2B.

[0038] After the clutch unit 3 performs a simple angular displacement in the direction that drives the output shaft 2 or the output shaft segments 2A and 2B to rotate synchronously, the state in which the output shaft 2 or the output shaft segments 2A and 2B rotate freely is switched to the state in which the clutch unit 3 drives the output shaft 2 or the output shaft segments 2A and 2B to rotate synchronously in one direction.

[0039] In a further embodiment, at least one of the clutch units 3 is used on the output shaft 2, that is, one clutch unit 3 controls the output shaft 2.

[0040] As shown in Figures 2, 5, 11, and 12, the clutch unit 3 includes a rotary drive unit 9 for transmitting power, a rotary driven unit 14 rotatably connected to the rotary drive unit 9 on the same axis, and a limiting unit 8 for non-locking the rotation of the rotary driven unit 14. The rotary drive unit 9, the rotary driven unit 14, and the limiting unit 8 are configured to axially penetrate the output shaft 2 or the output shaft segments 2A and 2B, and the rotary drive unit 9 and the rotary driven unit 14 are rotatably mounted on the output shaft 2 or the output shaft segments 2A and 2B. At least one connecting shaft 13 parallel to the output shaft 2 or the output shaft segments 2A and 2B is connected to the rotary driven unit 14. The connecting shaft 13 passes through an arc-shaped hole 9A correspondingly opened on the rotary drive unit 9 and connects to the locking part. The 10 is rotated to allow the rotary drive unit 9 to drive the locking part 10 to perform a simple angular displacement. After the locking part 10 performs a simple displacement, it engages with the rotating part 12 connected to the output shaft 2 or the output shaft segments 2A and 2B, thereby causing the output shaft 2 or the output shaft segments 2A and 2B to rotate synchronously with the rotary drive unit 9. The output shaft 2 or the output shaft segments 2A and 2B performs a simple angular displacement in the opposite direction to the synchronous rotation of the rotary drive unit 9 in one direction, thereby disengaging the rotating part 12 from the locking part 10, and allowing the output shaft 2 or the output shaft segments 2A and 2B to rotate freely. The housing part 1 restricts the limiting unit 8 from rotating about the output shaft 2 or the output shaft segments 2A and 2B as the axis.

[0041] The rotation of the driven part 14 is non-locked by the limiting unit 8. When the drive part 9 rotates, the driven part 14 is still stationary because the limiting unit 8 exerts force on it. Then, the drive part 9 drives the locking part 10 to make a simple angular displacement, which causes the locking part 10 to engage with the rotating part 12. This causes the drive part 9, the driven part 14, and the output shaft 2 or the output shaft segments 2A and 2B to rotate synchronously in one direction. Therefore, the limiting unit 8 is the key to whether the locking part 10 and the rotating part 12 can engage or disengage.

[0042] In order to non-lock-fit the rotation of the rotary driven part 14 and smoothly engage and disengage the locking part 10 from the connecting shaft 13, the limiting unit 8 is preferably a two-claw spring or a multi-claw spring. The spring selected has a certain degree of elasticity. The multi-claw spring can non-lock-fit the rotation of the rotary driven part 14 under the action of elastic force. The elastic clamping force of the spring is small. While clamping the rotary driven part 14, the rotary driven part 14 can still rotate, which reduces the wear between the spring and the rotary driven part 14.

[0043] As shown in Figures 6, 9, and 10, the rotary drive unit 9 includes a gear ring portion 9B with one end closed and having both internal and external teeth, and a protrusion 9C. The protrusion 9C is coaxially connected to the closed end of the gear ring portion 9B, and the arc-shaped segment hole 9A is located on the closed end face of the gear ring portion 9B. The rotary driven part 14 is coaxially rotatably disposed on the protrusion 9C. The gear ring portion 9B is used to accommodate the rotating part 12 and the locking part 10. The internal teeth of the gear ring portion 9B are used to drive the locking part 10 to perform a simple angular displacement, thereby disengaging and engaging the locking part 10 with the rotating part 12. The external teeth of the gear ring portion 9B are used to receive power transmitted from the outside.

[0044] As shown in Figures 7, 9, and 10, the locking part 10 includes a column 10A rotatably connected to the connecting shaft 13. The column 10A is provided with a toothed area 10B that meshes with the internal teeth of the gear ring part 9B and a locking tooth 10C for engaging or disengaging with the rotating part 12. When the gear ring part 9B rotates, it will drive the locking part 10 to perform a simple angular displacement, thereby engaging or disengaging the locking tooth 10C with the rotating part 12, so as to make the clutch unit 3 and the output shaft 2 or the output shaft segments 2A and 2B rotate synchronously in one direction.

[0045] As shown in Figures 8, 9 and 10, the rotating part 12 includes a connecting post 12A and a locking protrusion 12B connected to the output shaft 2 or the output shaft segments 2A and 2B. The connecting post 12A is provided with at least one locking protrusion 12B in the circumferential direction. The locking tooth 10C contacts the locking protrusion 12B to restrict the connecting post 12A, thereby causing the output shaft 2 or the output shaft segments 2A and 2B to rotate synchronously with the rotating drive part 9.

[0046] As shown in Figures 2 and 5, the rotating parts 12 on the output shaft segments 2A and 2B are rotatably connected by the mating pins 11, and the output shaft segments 2A and 2B are on the same straight line. This design enables the self-propelled vehicle to move forward synchronously on both sides when starting, and to move forward and backward freely on both sides when stopping, and to achieve differential turning of the self-propelled vehicle when starting.

[0047] As shown in Figure 2, the housing 1 also includes a motor 7 arranged in the housing 1 and supported by the housing 1, and a transmission unit located in the housing 1. The output end of the motor 7 is connected to the clutch unit (3) through the transmission mechanism to provide power to the output shaft 2 or the clutch unit 3 on the output shaft section 2A, 2B. The transmission mechanism plays a transmission role.

[0048] According to Figures 2, 3, 4, 11, and 12, the transmission unit includes a driving rotary gear 6 connected to the output end of the motor 7, a driven transmission part 2 5, and at least one driven transmission part 1 4. The driven transmission part 1 4 and the driven transmission part 2 5 are rotatably disposed within the housing part 1, and the driven transmission part 1 4 and the driven transmission part 2 5 are meshed to transmit power. The driving rotary gear 6 is meshed with the driven transmission part 2 5 to provide power. The driven transmission part 1 4 is meshed with the clutch unit 3 on the output shaft 2 or the output shaft segments 2A and 2B to perform gear transmission and provide driving force to the clutch unit 3 to achieve automatic drive.

[0049] In a further embodiment, the driven transmission part 2 5 includes an internal gear ring 5A with one end closed and a connecting gear 2 5B coaxially connected to the internal gear ring 5A. The driven transmission part 1 4 includes a toothed column 4A and a connecting gear 1 4B coaxially connected to the toothed column 4A. The internal teeth of the internal gear ring 5A mesh with the driving rotating gear 6. The connecting gear 2 5B meshes with the connecting gear 1 4B. The toothed column 4A meshes with the clutch unit 3 to achieve gear transmission. This design provides power to the clutch unit 3 through the linkage of multiple gears.

[0050] Working principle:

[0051] In operation, the starter motor 7 drives the gear ring 9B to rotate through the transmission mechanism. Under the restriction of the limiting unit 8, the rotating driven part 14 is stationary. Since the toothed area 10B meshes with the internal teeth of the gear ring 9B, the rotation of the gear ring 9B drives the column 10A to rotate and perform a simple angular displacement, so that the locking tooth 10C contacts the locking protrusion 12B on the connecting column 12A and engages. The locking tooth 10C pushes the locking protrusion 12B to make the output shaft 2 or the output shaft segments 2A, 2B and the gear ring 9B rotate synchronously in one direction, thus being in the driving state for automatically driving the lawnmower forward.

[0052] In the non-working state, the motor 7 is stopped, and the gear ring 9B is not subjected to external force. By causing the output shaft 2 or output shaft segments 2A and 2B to rotate synchronously with the gear ring 9B in one direction, a simple angular displacement is made in the opposite direction. The connecting column 12A rotates, causing the locking protrusion 12B to push the locking tooth 10C to separate from the locking protrusion 12B so that the two are disengaged. After that, the rotating part 12 and the output shaft 2 or output shaft segments 2A and 2B can rotate freely. At this time, the lawnmower can be manually pushed to move freely back and forth.

[0053] Differential operating state: When the output shaft sections 2A and 2B and the gear ring section 9B rotate synchronously in one direction, when the lawnmower is manually pushed to turn, the inner and outer output shaft sections 2A and 2B rotate at different speeds. The speed of the outer output shaft section is greater than that of the inner output shaft section. When the speed of the outer output shaft section is greater than that of the gear ring section 9B, the locking protrusion 12B pushes the locking tooth 10C to separate from the locking protrusion 12B, thereby disengaging the two. At this time, the inner and outer output shaft sections can form a differential speed when turning, realizing the differential function.

[0054] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A transmission device with clutching and differential functions, characterized in that, The invention relates to a box (1) comprising at least two box parts (1A, 1B) assembled together in a closed state of the box (1), at least one insertion hole (15A, 15B) for accessing the interior of the box (1) and an output shaft (2) inserted into the box (1) through the insertion hole (15A, 15B) provided in the box (1) and arranged to rotate in the box (1), the output shaft (2) being configured to extend at least partially outside the box (1) in the inserted state of the box (1) and in the closed state of the box (1), the output shaft (2) being formed of one piece or at least two output shaft segments (2A, 2B), the box (1) further comprising a clutch unit (3) for the output shaft (2) or the output shaft segments (2A, 2B), the clutch unit (3) being configured to rotate the output shaft (2) or the output shaft segments (2A, 2B) in one direction in the box (1) with the output shaft (2) or the output shaft segments (2A, 2B) as an axis in the inserted state of the box (1) and in the closed state of the box (1), the clutch unit (3) being activatable in the closed state of the box (1), the clutch unit (3) being configured to switch freely between a state in which the clutch unit (3) rotates the output shaft (2) or the output shaft segments (2A, 2B) in one direction and a state in which the output shaft (2) or the output shaft segments (2A, 2B) are free to rotate in the closed state of the box (1), wherein the clutch unit (3) is configured to switch from the state in which the clutch unit (3) rotates the output shaft (2) or the output shaft segments (2A, 2B) in one direction to the state in which the output shaft (2) or the output shaft segments (2A, 2B) are free to rotate by simple angular displacement of the clutch unit (3) in the opposite direction of the output shaft (2) or the output shaft segments (2A, 2B) in the closed state of the box (1) depending on the position of the output shaft (2) or the output shaft segments (2A, 2B) in the box (1), the clutch unit (3) being configured to switch from the state in which the output shaft (2) or the output shaft segments (2A, 2B) are free to rotate to the state in which the clutch unit (3) rotates the output shaft (2) or the output shaft segments (2A, 2B) in one direction after simple angular displacement of the clutch unit (3) in the direction in which the clutch unit (3) rotates the output shaft (2) or the output shaft segments (2A, 2B).

2. The transmission device with clutching and differential functions according to claim 1, characterized in that: at least one clutch unit (3) is used on the output shaft (2).

3. The transmission device with clutching and differential functions according to claim 1, characterized in that: The clutch unit (3) comprises a rotary driving part (9) for transmitting power, a rotary driven part (14) coaxially connected with the rotary driving part (9), and a limiting unit (8) for limiting the rotation of the rotary driven part (14) in a non-locking manner. The rotary driving part (9), the rotary driven part (14) and the limiting unit (8) are axially penetrated by the output shaft (2) or the output shaft segment (2A, 2B), and the rotary driving part (9) and the rotary driven part (14) are rotationally arranged on the output shaft (2) or the output shaft segment (2A, 2B). The rotary driven part (14) is connected with at least one connecting shaft (13) parallel to the output shaft (2) or the output shaft segment (2A, 2B). The connecting shaft (13) is rotationally connected with a locking part (10) through an arc-shaped hole (9A) corresponding to the locking part (10) on the rotary driving part (9), so that the rotary driving part (9) drives the locking part (10) to simply angularly displace. After the simple angular displacement of the locking part (10), the locking part (10) is combined with a rotating part (12) connected with the output shaft (2) or the output shaft segment (2A, 2B), so that the output shaft (2) or the output shaft segment (2A, 2B) rotates synchronously with the rotary driving part (9). The output shaft (2) or the output shaft segment (2A, 2B) angularly displaces in the opposite direction to the synchronous rotation of the rotary driving part (9) in one direction, so that the rotating part (12) is separated from the locking part (10), and the output shaft (2) or the output shaft segment (2A, 2B) is free to rotate. The box part (1) limits the limiting unit (8) to rotate around the output shaft (2) or the output shaft segment (2A, 2B) as the axis.

4. The transmission device with clutching and differential functions according to claim 3, characterized in that: The limiting unit (8) is preferably a two-claw spring or a multi-claw spring.

5. The transmission device with clutching and differential functions according to claim 3, characterized in that: The rotary driving part (9) comprises a gear ring part (9B) with a closed end and both internal and external teeth, and a protruding part (9C). The protruding part (9C) is coaxially connected with the closed end of the gear ring part (9B), and the arc-shaped hole (9A) is located on the closed end surface of the gear ring part (9B). The rotary driven part (14) is coaxially rotationally arranged on the protruding part (9C). The gear ring part (9B) is internally provided with the rotating part (12) and the locking part (10). The internal teeth of the gear ring part (9B) are used to drive the locking part (10) to simply angularly displace, so that the locking part (10) is separated from or combined with the rotating part (12).

6. The transmission device with clutching and differential functions according to claim 3, characterized in that: The locking part (10) comprises a column (10A) rotationally connected with the connecting shaft (13). The column (10A) is provided with a tooth-shaped area (10B) engaged with the internal teeth of the gear ring part (9B), and a locking tooth (10C) used to combine or separate from the rotating part (12). When the gear ring part (9B) rotates, the locking part (10) angularly displaces to make the locking tooth (10C) combined with or separated from the rotating part (12).

7. The transmission device with clutching and differential function according to claim 3, characterized in that: The rotating part (12) comprises a connecting column (12A) connected with the output shaft (2) or the output shaft segment (2A, 2B) and a locking protrusion (12B), at least one locking protrusion (12B) is arranged circumferentially on the connecting column (12A), the locking protrusion (12B) is in contact with the locking tooth (10C) to limit the connecting column (12A) so as to make the output shaft (2) or the output shaft segment (2A, 2B) rotate synchronously with the rotating driving part (9).

8. The transmission device with clutching and differential functions according to claim 3, characterized in that: The rotating parts (12) on the output shaft segments (2A, 2B) are connected by the butt joint pin (11), and the output shaft segments (2A, 2B) are in the same straight line.

9. The transmission device with clutching and differential function according to claim 1, characterized in that: The box part (1) further comprises a motor (7) arranged in the box part (1) and supported by the box part (1) and a transmission unit in the box part (1), the output end of the motor (7) is connected with the clutch unit (3) through a transmission mechanism for providing power to the clutch unit (3) on the output shaft (2) or the output shaft segment (2A, 2B).

10. The transmission device with clutching and differential function according to claim 9, characterized in that: The transmission unit comprises a driving rotating gear (6) connected with the output end of the motor (7), a driven transmission part two (5) and at least one driven transmission part one (4), wherein the driven transmission part one (4) and the driven transmission part two (5) are arranged in rotation in the box part (1), the driven transmission part one (4) and the driven transmission part two (5) are arranged in meshing, the driving rotating gear (6) is arranged in meshing with the driven transmission part two (5), and the driven transmission part one (4) is arranged in meshing with the clutch unit (3) on the output shaft (2) or the output shaft segment (2A, 2B). The transmission unit comprises a driving rotating gear (6) connected with the output end of the motor (7), a driven transmission part two (5) and at least one driven transmission part one (4), wherein the driven transmission part one (4) and the driven transmission part two (5) are arranged in rotation in the box part (1), the driven transmission part one (4) and the driven transmission part two (5) are arranged in meshing, the driving rotating gear (6) is arranged in meshing with the driven transmission part two (5), and the driven transmission part one (4) is arranged in meshing with the clutch unit (3) on the output shaft (2) or the output shaft segment (2A, 2B).

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