Bidirectional automatic clutch transmission mechanism and gear reduction driving device

Abstract

The invention provides a bidirectional automatic clutch transmission mechanism and a gear reduction driving device. A bidirectional automatic clutch transmission mechanism comprises a driving wheel, a driven wheel and a roller keeping reset assembly. The inner wall of the driving wheel is provided with at least one pair of eccentric arc surfaces symmetrically arranged in the radial direction. The roller keeping and resetting assembly comprises a locking roller, a roller support used for containing the locking roller and a roller cover plate connected with the roller support. The roller cover plate is provided with at least one pair of elastic arms symmetrically arranged in the radial direction. And after the driving wheel stops rotating, the elastic arm subjected to elastic deformation is reset, and the reverse driving roller keeps the reset assembly rotating relative to the driving wheel, so that the locking roller moves from the locking area to the separation area to be separated from the locking state, and bidirectional automatic clutch is achieved.

Description

Technical Field

[0001] The present invention relates to a clutch mechanism and a gear reduction drive device having the mechanism, in particular to a bidirectional automatic clutch transmission mechanism and the gear reduction drive device, belonging to the technical field of mechanical transmission. Background Art

[0002] In automated mechanical equipment, especially equipment such as intelligent molded case circuit breakers that require switching between electric and manual operation, the clutch device is a key component for achieving power transmission and separation. Existing automatic clutch devices are usually implemented using mechanisms such as one-way bearings or ratchet pawls, and most of them can only achieve one-way automatic clutching, that is, they can only transmit power in a fixed direction of rotation and automatically separate in the opposite direction. This leads to limited application scenarios and cannot meet the use requirements in situations where the direction of movement is uncertain. If the clutch direction is to be changed, it needs to be redesigned or customized, which is not conducive to product standardization and mass production. In addition, in many applications, the clutch device and the gear reduction mechanism are two separately designed components. This design results in a complex structure and bulky volume of the overall drive device, which is not conducive to the development of equipment towards miniaturization and integration. Summary of the Invention

[0003] Based on the above background, an object of the present invention is to provide a bidirectional automatic clutch transmission mechanism capable of achieving bidirectional automatic clutching.

[0004] Another object of the present invention is to provide a gear reduction drive device that integrates the above-mentioned bidirectional automatic clutch transmission mechanism and has a compact structure.

[0005] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0006] A two-way automatic clutch transmission mechanism, comprising a driving wheel, a driven wheel coaxially arranged inside the driving wheel, and a roller holding and resetting assembly arranged between the driving wheel and the driven wheel; the inner wall of the driving wheel is provided with at least a pair of eccentric arc surfaces arranged symmetrically along the radial direction; the roller holding and resetting assembly comprises at least one locking roller, a roller bracket for accommodating the locking roller, and a roller cover plate connected to the roller bracket, the roller cover plate is provided with at least a pair of elastic arms arranged symmetrically along the radial direction; the locking roller is located between the eccentric arc surface of the driving wheel and the outer peripheral wall surface of the driven wheel The end of the eccentric arc surface is configured as a locking area for wedging the locking roller, and the middle part of the eccentric arc surface is configured as a separation area for allowing the locking roller to move; the inner wall of the driving wheel is also provided with a cover elastic arm driving wall for pushing the elastic arm corresponding to the roller cover to elastically deform when the driving wheel rotates; when the driving wheel stops rotating, the elastically deformed elastic arm is reset, and the roller is reversely driven to keep the reset assembly rotating relative to the driving wheel, so that the locking roller moves from the locking area to the separation area and is out of the locked state.

[0007] Preferably, the roller holding reset assembly also includes a roller return drive gear fixedly connected to the driven wheel, and a roller cover return drive surface is provided on the elastic arm. When the driven wheel rotates relative to the roller cover, the roller return drive gear pushes the roller cover return drive surface to cause the roller holding reset assembly to rotate.

[0008] The roller is provided to return the driving gear so that when the resetting force of the elastic arm is insufficient, the driven wheel can be rotated to force the driving roller to keep the resetting assembly in the reset position.

[0009] Preferably, a locking and giving way groove is provided on the outer periphery of the roller return drive gear, and when the elastic arm is elastically deformed, a part of the elastic arm is located in the locking and giving way groove.

[0010] The locking and giving way groove provides necessary movement space for the deformation of the elastic arm, thereby preventing the elastic arm from interfering with the roller return drive gear during the deformation process.

[0011] Preferably, the shortest straight-line distance L between the middle of the eccentric arc surface and the outer peripheral wall of the driven wheel, the shortest straight-line distance L1 between the end of the eccentric arc surface and the outer peripheral wall of the driven wheel, and the diameter D of the locking roller satisfy the following relationship: L>D>L1.

[0012] The above-mentioned dimensional relationship ensures that there is a movable gap in the separation area of ​​the eccentric arc surface of the locking roller, and an effective interference wedge can be formed in the locking area.

[0013] Preferably, the roller bracket is provided with a roller positioning cavity for accommodating the locking roller, and a roller cover positioning groove for positioningly connecting with the roller cover.

[0014] Preferably, the elastic arm is provided with a roller cover displacement driving surface for being pushed by the cover elastic arm driving wall.

[0015] The displacement driving surface of the roller cover serves as a specific force-bearing surface on the elastic arm to ensure the force transmission between the driving wheel and the elastic arm.

[0016] Preferably, the bidirectional automatic clutch transmission mechanism also includes an upper shell and a lower shell, and the driving wheel, the driven wheel and the roller holding reset assembly are enclosed in a cavity enclosed by the upper shell and the lower shell, and there is friction contact between the roller holding reset assembly and the upper shell and the lower shell.

[0017] Preferably, the outer periphery of the roller bracket is provided with at least one friction elastic arm for generating friction resistance with the upper shell, and the end of the friction elastic arm is provided with a friction elastic arm boss for abutting against the inner cavity wall of the upper shell.

[0018] A gear reduction drive device includes a motor, a gear reduction mechanism connected to the motor, and the bidirectional automatic clutch transmission mechanism as described above, wherein the input end of the gear reduction mechanism is fixedly connected to the output end of the motor, and the output end of the gear reduction mechanism is meshedly connected to the driving wheel of the bidirectional automatic clutch transmission mechanism.

[0019] Preferably, the gear reduction mechanism includes a drive transmission assembly and a parallel axis gear reduction assembly, the drive transmission assembly is a worm gear transmission assembly or a gear transmission assembly, and the parallel axis gear reduction assembly includes a plurality of reduction gears arranged in parallel and meshed in sequence.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] A bidirectional automatic clutch transmission mechanism of the present invention utilizes an elastic arm to store energy during the locking process and release the energy to drive the reset structure after stopping, thereby realizing automatic separation of the clutch. The entire clutch process is completely completed by the internal mechanical structure, with a simple structure and reliable operation. By adopting symmetrically arranged eccentric arc surfaces and symmetrically arranged elastic arm structures, the transmission mechanism has the same automatic clutch function of transmission separation in both forward and reverse directions, realizing bidirectional automatic clutching and greatly broadening its application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0023] Figure 1 This is a schematic diagram of the internal structure of a bidirectional automatic clutch transmission mechanism of the present invention;

[0024] Figure 2 It is a schematic diagram of the exploded structure of a bidirectional automatic clutch transmission mechanism of the present invention;

[0025] Figure 3 This is a schematic diagram of the exploded structure of the roller holding and resetting assembly in the present invention;

[0026] Figure 4 1 is a schematic top view of the structure of the roller holding and resetting assembly in the present invention;

[0027] Figure 5 It is a schematic diagram of the three-dimensional structure of the roller bracket in the present invention;

[0028] Figure 6 It is a schematic diagram of the three-dimensional structure of the roller cover in the present invention;

[0029] Figure 7 It is a schematic diagram of the three-dimensional structure of the roller return drive gear in the present invention;

[0030] Figure 8 Schematic diagram of the top view of the driving wheel in the present invention;

[0031] Figure 9 It is a schematic diagram of the three-dimensional structure of the driven wheel in the present invention;

[0032] Figure 10 It is a schematic diagram of the three-dimensional structure of a gear reduction drive device in which the drive transmission assembly is a worm gear transmission assembly according to the present invention;

[0033] Figure 11 It is a schematic diagram of the three-dimensional structure of a gear reduction drive device in which the drive transmission assembly is a gear transmission assembly according to the present invention;

[0034] In the figure: 1. driving wheel; 2. driven wheel; 3. upper housing; 4. lower housing; 5. roller retaining reset assembly; 10. motor; 20. gear reduction mechanism; 30. two-way automatic clutch transmission mechanism; 21. worm; 22. turbine; 23. first-stage reduction gear; 24. second-stage reduction gear; 25. third-stage reduction gear; 26. driving wheel drive gear; 27. rotor output gear; 101. eccentric arc surface; 102. cover plate elastic arm drive wall; 103. concentric arc transition section; 104, return groove; 201, output drive surface; 202, locking return drive surface; 501, locking roller; 502, roller bracket; 503, roller cover; 504, roller return drive gear; 5021, roller positioning cavity; 5022, roller cover positioning groove; 5023, friction elastic arm; 5024, friction elastic arm boss; 5031, elastic arm; 5032, roller cover return drive surface; 5033, roller cover displacement drive surface; 5041, locking yield groove. DETAILED DESCRIPTION

[0035] The technical solution of the present invention will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings. It should be understood that the implementation of the present invention is not limited to the following embodiments, and any form of modification and / or change made to the present invention will fall within the scope of protection of the present invention.

[0036] In the present invention, unless otherwise specified, all parts and percentages are by weight. The equipment and raw materials used are commercially available or commonly used in the art. The methods in the following embodiments, unless otherwise specified, are conventional methods in the art. The components or equipment in the following embodiments, unless otherwise specified, are all universal standard parts or components known to those skilled in the art. Their structures and principles are known to those skilled in the art through technical manuals or routine experimental methods.

[0037] The following detailed description of the embodiments of the present invention is made in conjunction with the accompanying drawings. In the following detailed description, for ease of explanation, many specific details are set forth to provide a comprehensive understanding of the embodiments of the present invention. However, one or more embodiments may be implemented by those skilled in the art without these specific details.

[0038] like Figure 1 and Figure 2 As shown, an embodiment of the present invention discloses a bidirectional automatic clutch transmission mechanism, including a driving wheel 1, a driven wheel 2 coaxially mounted inside the driving wheel 1, and a roller holding and resetting assembly 5 arranged in an annular space between the driving wheel 1 and the driven wheel 2. The three components are enclosed in a cavity formed by an upper shell 3 and a lower shell 4.

[0039] like Figure 3 and Figure 4As shown, the roller holding and resetting assembly 5 includes a cage-shaped roller bracket 502 , a plurality of locking rollers 501 , a roller cover plate 503 and a roller return drive gear 504 .

[0040] like Figure 5 As shown, the roller bracket 502 is provided with multiple roller positioning cavities 5021 evenly distributed along the circumference. Each roller positioning cavity 5021 is used to accommodate and guide the radial and axial movement of a locking roller 501. To ensure accurate assembly and positioning with the roller cover 503, the roller bracket 502 is also provided with a roller cover positioning groove 5022 and a roller return positioning groove. At least one friction elastic arm 5023 is integrally formed on the outer periphery of the roller bracket 502, with a friction elastic arm boss 5024 at its end.

[0041] like Figure 6 As shown, the roller cover 503 is provided with a positioning boss and a return positioning boss, which respectively correspond to the roller cover positioning groove 5022 and the roller return positioning groove on the roller bracket 502. During assembly, the locking roller 501 is placed in the roller positioning cavity 5021, and then the roller cover 503 is closed. The positioning boss and the return positioning boss are respectively inserted into the roller cover positioning groove 5022 and the roller return positioning groove of the roller bracket 502, thereby reliably positioning and connecting the roller cover 503 to the roller bracket 502 and enclosing the locking roller 501 in the roller positioning cavity 5021.

[0042] The roller cover 503 is also provided with at least one pair of radially symmetrically distributed elastic arms 5031. In this embodiment, three pairs of elastic arms 5031 are provided, evenly spaced around the outer circumference of the roller cover 503. Each elastic arm 5031 is provided with a roller cover displacement drive surface 5033 for being pushed and a roller cover return drive surface 5032 for being driven by the roller return drive gear 504.

[0043] The roller return drive gear 504 is fixedly connected to the driven wheel 2. When the driven wheel 2 rotates relative to the roller cover 503, the roller return drive gear 504 can push the roller cover return drive surface 5032 to keep the roller reset assembly 5 rotating. Figure 7 As shown, a locking and giving way groove 5041 is provided on the outer periphery of the roller return driving gear 504 . When the elastic arm 5031 is elastically deformed, a portion of the elastic arm 5031 is located in the locking and giving way groove 5041 .

[0044] like Figure 8As shown, the inner wall of the driving wheel 1 is provided with at least one pair of radially symmetrically arranged eccentric arc surfaces 101. In this embodiment, three pairs of eccentric arc surfaces 101 are provided, matching the number of elastic arms 5031. A concentric arc transition section 103 is provided between each pair of eccentric arc surfaces 101 as a connection, and the symmetry centerline of the pair of eccentric arc surfaces 101 is a radial line connecting the midpoint of the concentric arc transition section 103 and the axis of the driving wheel 1. The center of curvature of the eccentric arc surface 101 deviates from the geometric center of the driving wheel 1, resulting in a variable distance from a point on the eccentric arc surface 101 to the outer peripheral wall of the driven wheel 2. The central region of the eccentric arc surface 101 constitutes a separation zone with a larger gap, while the two ends of the eccentric arc surface 101 constitute a locking zone with a smaller gap. The shortest straight-line distance L between the middle of the eccentric arc surface 101 and the outer peripheral wall of the driven wheel 2, the shortest straight-line distance L1 between the end of the eccentric arc surface 101 and the outer peripheral wall of the driven wheel 2, and the diameter D of the locking roller 501 satisfy the following relationship: L>D>L1.

[0045] At the position corresponding to the roller cover displacement drive surface 5033 of the elastic arm 5031, the inner wall of the driving wheel 1 is provided with a return groove 104. The side wall of the return groove 104 is configured as the cover elastic arm drive wall 102, which is used to push the elastic arm 5031 corresponding to the roller cover 503 to undergo elastic deformation when the driving wheel 1 rotates. Therefore, the number of return grooves 104 is also set to three. Moreover, each return groove is located between two pairs of adjacent eccentric arc surfaces 101. Therefore, whether in the clockwise direction or the counterclockwise direction, the inner wall of the driving wheel 1 forms a cyclic repeating structure of concentric arc transition section 103-eccentric arc surface 101-cover elastic arm drive wall 102-return groove 104-cover elastic arm drive wall 102-eccentric arc surface 101-concentric arc transition section 103.

[0046] like Figure 9 As shown, the outer peripheral wall of the driven wheel 2 serves as an inner raceway for the locking roller 501. The output end of the driven wheel 2 is machined into a non-circular output drive surface 201. In this embodiment, it is a flat square structure with two parallel surfaces. This is used to directly form a surface-contact, anti-rotation, rigid connection with the inner hole of the external load, thereby reliably transmitting high torque. Furthermore, the other end of the driven wheel 2, away from its output end, is also machined into a non-circular locking return drive surface 202, which is used to fixedly connect to the roller return drive gear 504, thereby driving the roller return drive gear 504 to rotate when the driven wheel 2 rotates.

[0047] During assembly, the driven wheel 2 is inserted into the center of the driving wheel 1, and the pre-installed roller holding and reset assembly 5 is placed in the annular space between the two. Then, after the three are installed between the upper shell 3 and the lower shell 4, the friction elastic arm boss 5024 on the roller bracket 502 abuts against the inner cavity wall of the upper shell 3, and at the same time, the flat end surface of the roller cover 503 contacts the inner wall of the lower shell 4, thereby generating friction resistance between the roller holding and reset assembly 5 and the shell.

[0048] In the static state, the locking roller 501 is located in the separation zone in the middle of the eccentric arc surface 101. Since the gap L here is larger than the roller diameter D, the locking roller 501 cannot simultaneously wedge the driving wheel 1 and the driven wheel 2, so the bidirectional automatic clutch transmission mechanism 30 is in the disengaged state.

[0049] When the driving wheel 1 begins to rotate, the roller retaining reset assembly 5 experiences relative hysteresis due to frictional resistance. This relative motion pushes the locking roller 501 into the locking zone at the end of the eccentric arc surface 101. Because the gap L1 here is smaller than the roller diameter D, the locking roller 501 is wedged, forming a rigid connection between the driving wheel 1 and the driven wheel 2 via the locking roller 501. The torque of the driving wheel 1 is transmitted to the driven wheel 2 through the locking roller 501. During this process, the elastic arm driving wall 102 on the cover plate of the driving wheel 1 also synchronously pushes the corresponding elastic arm 5031 on the roller cover plate 503, causing the elastic arm 5031 to bend and deform and enter the locking and yielding groove 5041 of the roller return drive gear 504, storing mechanical energy in the form of elastic potential energy.

[0050] When the driving wheel 1 stops rotating, the thrust applied to the elastic arm 5031 disappears. The compressed elastic arm 5031 instantly releases its stored elastic energy, generating reverse thrust, driving the roller to keep the reset assembly 5 rotating relative to the driving wheel 1, pushing the locking roller 501 from the locking area back to the separation area, releasing the wedging state, and the two-way automatic clutch transmission mechanism 30 returns to the separation state.

[0051] Since all key structures are symmetrically arranged, the bidirectional automatic clutch transmission mechanism works in exactly the same way when rotating in the reverse direction.

[0052] In some cases, if the elastic force alone cannot reset the vehicle, the driven wheel 2 only needs to be rotated a small angle in the original direction of rotation, and the roller return drive gear 504 fixedly connected to it pushes the roller cover return drive surface 5032 on the elastic arm 5031. The pushing force causes the elastic arm 5031 to generate a reverse thrust to push the locking roller 501 back from the locking area to the separation area.

[0053] The present invention also discloses a gear reduction drive device, comprising a motor 10, a gear reduction mechanism 20 connected to the motor 10, and the aforementioned bidirectional automatic clutch transmission mechanism 30. The input end of the gear reduction mechanism 20 is fixedly connected to the output end of the motor 10, and the output end of the gear reduction mechanism 20 is meshedly connected to the driving wheel 1 of the bidirectional automatic clutch transmission mechanism 30.

[0054] The gear reduction mechanism 20 includes a drive transmission assembly and a parallel axis gear reduction assembly. Figure 10 As shown, the drive transmission assembly is a turbine 22 worm 21 transmission assembly. The parallel axis gear reduction assembly includes three reduction gears arranged in parallel and meshed in sequence, and a final driving wheel drive gear 26. The output end of the motor 10, which serves as a power source, is fixedly connected to the worm 21, and the worm 21 is meshed with the turbine 22 to form a drive transmission assembly with a large reduction ratio. Subsequently, the power is transmitted to the first-stage reduction gear 23, the second-stage reduction gear 24, the third-stage reduction gear 25 and the driving wheel drive gear 26 in sequence through the turbine 22 transmission gear coaxially arranged with the turbine 22, further reducing the speed and increasing the torque. The driving wheel drive gear 26 is meshed and connected to the driving wheel 1 to drive the driving wheel 1 to rotate. The driven wheel 2 of the two-way automatic clutch transmission mechanism 30, as the final output end of the entire gear reduction drive device, outputs power to the outside.

[0055] In another embodiment, the drive transmission assembly is a gear transmission assembly, specifically, Figure 11 As shown, the output end of the motor 10 is fixedly connected to the rotor output gear 27, which is engaged with the first-stage reduction gear 23 to transmit power to the second-stage reduction gear 24, the third-stage reduction gear 25 and the driving wheel drive gear 26 in sequence.

[0056] When the gear reduction drive device is operating, the motor 10 drives the gear reduction mechanism 20, which in turn drives the driving wheel 1 to rotate. The clutch automatically locks and outputs torque. When the motor 10 stops, the clutch automatically disengages, allowing the output end to be freely rotated forward and reverse by an external device, such as a circuit breaker manual operating handle, without reverse driving the gear reduction mechanism 20, thus achieving compatibility and seamless switching between electric and manual operation.

[0057] This gear reduction drive integrates a bidirectional automatic clutch function with a high reduction ratio transmission mechanism. It has a compact structure and reliable performance, providing an ideal solution for equipment such as intelligent circuit breakers that require miniaturized and highly reliable drive units.

[0058] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A two-way automatic clutch transmission mechanism, characterized by: The bidirectional automatic clutch transmission mechanism comprises a driving wheel (1), a driven wheel (2) coaxially arranged inside the driving wheel (1), and a roller holding and resetting assembly (5) arranged between the driving wheel (1) and the driven wheel (2); the inner wall of the driving wheel (1) is provided with at least one pair of eccentric arc surfaces (101) symmetrically arranged along the radial direction; the roller holding and resetting assembly (5) comprises at least one locking roller (501), a roller bracket (502) for accommodating the locking roller (501), and a roller cover (503) connected to the roller bracket (502); the roller cover (503) is provided with at least one pair of elastic arms (5031) symmetrically arranged along the radial direction; the locking roller (501) is located between the eccentric arc surface (101) of the driving wheel (1) and the driven wheel (2), the end of the eccentric arc surface (101) is configured as a locking area for wedging the locking roller (501), and the middle of the eccentric arc surface (101) is configured as a separation area for allowing the locking roller (501) to move; the inner wall of the driving wheel (1) is also provided with a cover elastic arm driving wall (102) for pushing the elastic arm (5031) corresponding to the roller cover plate (503) to elastically deform when the driving wheel (1) rotates; when the driving wheel (1) stops rotating, the elastic arm (5031) that has elastically deformed is reset, and the roller holding reset assembly (5) is reversely driven to rotate relative to the driving wheel (1), so that the locking roller (501) moves from the locking area to the separation area and is released from the locked state.

2. A two-way automatic clutch transmission mechanism according to claim 1, characterized in that: The roller holding reset assembly (5) further comprises a roller return drive gear (504) fixedly connected to the driven wheel (2); a roller cover plate return drive surface (5032) is provided on the elastic arm (5031); when the driven wheel (2) rotates relative to the roller cover plate (503), the roller return drive gear (504) pushes the roller cover plate return drive surface (5032) to rotate the roller holding reset assembly (5).

3. A two-way automatic clutch transmission mechanism according to claim 2, characterized in that: A locking and yielding groove (5041) is provided on the outer periphery of the roller return driving gear (504), and when the elastic arm (5031) is elastically deformed, a portion of the elastic arm (5031) is located in the locking and yielding groove (5041).

4. The bidirectional automatic clutch transmission mechanism according to claim 1, characterized in that: The shortest straight-line distance L between the middle of the eccentric arc surface (101) and the outer peripheral wall surface of the driven wheel (2), the shortest straight-line distance L1 between the end of the eccentric arc surface (101) and the outer peripheral wall surface of the driven wheel (2), and the diameter D of the locking roller (501) satisfy the following relationship: L>D>L1.

5. The bidirectional automatic clutch transmission mechanism according to claim 1, characterized in that: The roller bracket (502) is provided with a roller positioning cavity (5021) for accommodating the locking roller (501), and a roller cover plate positioning groove (5022) for positioning and connecting with the roller cover plate (503).

6. The bidirectional automatic clutch transmission mechanism according to claim 1, characterized in that: The elastic arm (5031) is provided with a roller cover plate displacement driving surface (5033) for being pushed by the cover plate elastic arm driving wall surface (102).

7. The bidirectional automatic clutch transmission mechanism according to claim 1, characterized in that: The bidirectional automatic clutch transmission mechanism further comprises an upper shell (3) and a lower shell (4); the driving wheel (1), the driven wheel (2) and the roller holding reset assembly (5) are enclosed in a cavity enclosed by the upper shell (3) and the lower shell (4); and the roller holding reset assembly (5) is in frictional contact with both the upper shell (3) and the lower shell (4).

8. The bidirectional automatic clutch transmission mechanism according to claim 7, characterized in that: The outer periphery of the roller bracket (502) is provided with at least one friction elastic arm (5023) for generating friction resistance with the upper shell (3), and the end of the friction elastic arm (5023) is provided with a friction elastic arm boss (5024) for abutting against the inner cavity wall of the upper shell (3).

9. A gear reduction drive device, characterized in that: The gear reduction drive device comprises a motor (10), a gear reduction mechanism (20) connected to the motor (10), and a bidirectional automatic clutch transmission mechanism according to any one of claims 1 to 8, wherein the input end of the gear reduction mechanism (20) is fixedly connected to the output end of the motor (10), and the output end of the gear reduction mechanism (20) is meshedly connected to the driving wheel (1) of the bidirectional automatic clutch transmission mechanism.

10. The gear reduction drive device according to claim 9, characterized in that: The gear reduction mechanism (20) comprises a drive transmission assembly and a parallel axis gear reduction assembly, wherein the drive transmission assembly is a worm gear transmission assembly or a gear transmission assembly, and the parallel axis gear reduction assembly comprises a plurality of reduction gears arranged in parallel and meshed in sequence.

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