A two-way clutch and a clutch system

Abstract

The present invention relates to the technical field of automotive parts, and specifically relates to a two-way clutch for overload clutch between a driving motor and a lead screw of an automotive electric strut, including: a sleeve, a rotor and a clutch assembly; wherein, the sleeve is connected to an external lead screw assembly; the rotor is arranged in the sleeve and is connected to an external driving motor, and a plurality of groove groups are arranged on the outer surface of the rotor, and an outer contact surface is formed between two adjacent groove groups; each groove group is provided with the clutch assembly, and the clutch assembly is used to achieve overload clutch between the rotor and the sleeve. The present invention also provides a clutch system, including: a lead screw assembly, a driving motor and the two-way clutch. By mutually matching the provided rotor and the sleeve, and using the clutch assembly to realize the transmission separation between the rotor and the sleeve during overload, the gears of the speed reducer of the driving motor are prevented from being damaged.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive parts, and particularly to a two-way clutch and a clutch system. Background Art

[0002] The electric tailgate strut is a common automotive part. The common electric tailgate strut realizes the retraction and extension operation by driving the screw rod to rotate through a driving motor. There is a possibility of abuse or violent operation to varying degrees during the assembly process of the electric strut on the customer production line or during the subsequent use by the user, resulting in the driving motor being overloaded. In the overload operation, the planetary gears of the speed reducer will be damaged to varying degrees, thus affecting the subsequent normal use of the electric strut. In view of this, we propose a two-way clutch and a clutch system. Summary of the Invention

[0003] The purpose of the present invention is to provide a two-way clutch and a clutch system to solve the problems raised in the above background art.

[0004] To achieve the above purpose, the present invention provides the following technical solutions:

[0005] A two-way clutch for overload clutch between the driving motor of an automotive electric strut and the screw rod, comprising: a sleeve, a rotor and a clutch assembly; wherein, the sleeve is connected to the external screw rod assembly; the rotor is arranged inside the sleeve and is connected to the external driving motor. A plurality of groove groups are arranged on the outer surface of the rotor. An outer contact surface is formed between two adjacent groove groups, and the outer contact surface is in fit with the inner wall of the sleeve; the clutch assembly is arranged in each groove group, and the clutch assembly is used to realize the overload clutch between the rotor and the sleeve.

[0006] Preferably, the groove group includes: a left sliding groove and a right sliding groove, and an inner contact surface is formed between the left sliding groove and the right sliding groove; the clutch assembly includes: a transmission column and a spring; wherein, the transmission column is arranged on the inner contact surface, and springs are connected to both sides of the transmission column, and the springs provide elastic support.

[0007] Preferably, an arc transition surface is provided between the left sliding groove and the inner contact surface, and between the right sliding groove and the inner contact surface.

[0008] Preferably, the two ends of the spring on the left side of the transmission column are respectively fixed on the left sliding groove and the left side surface of the transmission column; the two ends of the spring on the right side of the transmission column are respectively fixed on the right sliding groove and the right side surface of the transmission column.

[0009] Preferably, a clamping post is arranged on the bottom surface of the sleeve; a gear post is arranged on the top surface of the rotor.

[0010] The present invention also provides a clutch system, including: a lead screw assembly, a drive motor, and the described bidirectional clutch;

[0011] The lead screw assembly is connected to the sleeve of the bidirectional clutch through a coupling;

[0012] The drive motor is connected to the rotor of the bidirectional clutch through a speed reducer.

[0013] Compared with the prior art, the beneficial effects of the present invention are: through the mutual cooperation of the rotor and the sleeve, and using the clutch assembly for transmission, when overload occurs, the clutch assembly can realize the transmission separation between the rotor and the sleeve, thereby avoiding damage to the gears of the speed reducer of the drive motor, with a simple structure and convenient practical use. Description of the Drawings

[0014] Figure 1 It is a schematic diagram of the overall structure of the first embodiment of the present invention;

[0015] Figure 2 It is a cross-sectional view of the overall structure of the first embodiment of the present invention;

[0016] Figure 3 It is a schematic diagram of the installation structure of the rotor and the clutch assembly in the first embodiment of the present invention;

[0017] Figure 4 It is the front view of the overall structure of the second embodiment of the present invention.

[0018] In the figure: 1. Sleeve; 11. Clamping post; 2. Rotor; 21. Groove group; 211. Left chute; 212. Right chute; 213. Inner contact surface; 214. Arc transition surface; 22. Outer contact surface; 23. Gear post; 3. Clutch assembly; 31. Transmission post; 32. Spring; 4. Lead screw assembly; 41. Coupling; 5. Drive motor; 51. Speed reducer. Detailed Embodiments

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0020] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0021] In the description of this patent, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "coupled", "set" should be understood in a broad sense. For example, it can be fixedly connected and set, or detachably connected and set, or integrally connected and set. For those of ordinary skill in the art, the specific meanings of the above terms in this patent can be understood according to specific circumstances. In the description of the present invention, "plurality" means two or more unless otherwise specifically defined.

[0022] Embodiment 1

[0023] A two-way clutch is used for overload clutch between the drive motor of an automotive electric strut and a lead screw, as Figures 1-3As shown in the figure, it includes: a sleeve 1, a rotor 2 and a clutch assembly 3; among them, the sleeve 1 is connected to the external lead screw assembly; the rotor 2 is arranged inside the sleeve 1 and is connected to the external drive motor. A plurality of groove groups 21 are arranged on the outer surface of the rotor 2. An outer contact surface 22 is formed between two adjacent groove groups 21, and the outer contact surface 22 is in contact with the inner wall of the sleeve 1. Specifically, the groove group 21 includes: a left chute 211 and a right chute 212, and an inner contact surface 213 is formed between the left chute 211 and the right chute 212; in each groove group 21 of this embodiment, a clutch assembly 3 is arranged, and the clutch assembly 3 is used to realize the overload clutch between the rotor 2 and the sleeve 1, and the clutch assembly 3 includes: a transmission column 31 and a spring 32; among them, the transmission column 31 is arranged on the inner contact surface 213, and springs 32 are connected to both sides of the transmission column 31, and the spring 32 is used to provide elastic support for the transmission column 31. Therefore, during the process of the drive motor driving the rotor 2 to rotate, due to the outer contact surface 22 on the inner wall of the rotor 2 and the transmission column 31 on the clutch assembly 3 both being in contact with the inner wall of the sleeve 1, when the rotor 2 rotates, it drives the sleeve 1 to rotate together, so that the lead screw assembly connected to the outside of the sleeve 1 rotates. When the drive motor is overloaded and continues to drive the rotor 2 to rotate, and during the process of the rotor 2 rotating clockwise or counterclockwise, the transmission column 31 rolls into the left chute 211 or the right chute 212 and compresses the spring 32. At this time, the frictional force between the transmission column 31 and the inner wall of the sleeve 1 is not enough to support the rotor 2 to drive the sleeve 1 to rotate together, so that the lead screw assembly stops working, avoiding damage to the reduction gear of the drive motor after loading. After the drive motor is turned off and stops working, the elastic recovery of the spring 32 pushes the transmission column 31 back to the inner contact surface 213 again, so as to achieve the overload clutch effect through this two-way clutch.

[0024] It should be noted that an arc transition surface 214 is provided between the left chute 211 and the inner contact surface 213, and between the right chute 212 and the inner contact surface 213. The arc transition surface 214 can enable the transmission column 31 to move better between the left chute 211, the right chute 212 and the inner contact surface 213, and when moving into the left chute 211 or the right chute 212, the frictional force between the rotor 2 and the inner wall of the sleeve 1 is reduced, realizing the clutch effect between the rotor 2 and the sleeve 1.

[0025] Specifically, the two ends of the spring 32 on the left side of the transmission column 31 are respectively fixed on the left chute 211 and the left side surface of the transmission column 31; the two ends of the spring 32 on the right side of the transmission column 31 are respectively fixed on the right chute 212 and the right side surface of the transmission column 31. It is convenient to use the spring 32 to provide elastic support for the transmission column 31, and when the transmission column 31 slides into the left chute 211 or the right chute 212, it can be pushed back to the inner contact surface 213 by the spring 32. In this embodiment, 4 springs 32 are provided, and are respectively arranged on both sides of the upper and lower ends of the limit column 31.

[0026] It should be noted that the bottom surface of the sleeve 1 is provided with a clamping post 11, which is convenient for connecting the external lead screw assembly in cooperation with the coupling by using the clamping post 11. The top surface of the rotor 2 is provided with a gear post 23, which is convenient for connecting the external driving motor in engagement with the reduction gearbox by using the gear post 23.

[0027] It can be easily seen from the above content that when the two-way clutch of this embodiment is in use, during the process of the driving motor driving the rotor 2 to rotate, the rotor 2 drives the sleeve 1 to rotate together through the frictional force between the outer contact surface 12, the inner contact surface 213 and the inner wall of the sleeve 1, so that the lead screw assembly connected to the outside of the sleeve 1 rotates. When an overload occurs, during the process of the driving motor continuing to pull the rotor 2 to rotate clockwise or counterclockwise, the transmission post 31 rolls into the left chute 211 or the right chute 212 and compresses the spring 32 on one side of it. At this time, the frictional force between the transmission post 31 and the inner wall of the sleeve 1 is not enough to support the rotor 2 to drive the sleeve 1 to rotate together, so that the lead screw assembly stops working, avoiding damage to the reduction gearbox gear of the driving motor. After the driving motor stops working, the elasticity of the spring 32 is restored, and the transmission post 31 is pushed back to the inner contact surface 213 again, so as to achieve the overload clutch effect through this two-way clutch. The structure is simple, easy to use, and convenient for popularization and promotion.

[0028] Embodiment 2

[0029] Embodiment 2 is an improved scheme of Embodiment 1. The improvement lies in providing a clutch system, as Figure 4 shown, including: a lead screw assembly 4, a driving motor 5 and a two-way clutch; wherein, the lead screw assembly 4 is connected to the sleeve 1 of the two-way clutch through a coupling 41; the driving motor 5 is connected to the rotor 2 of the two-way clutch through a reduction gearbox 51; specifically, the coupling 41 is connected to the sleeve 1 through a clamping post 11; the reduction gearbox 51 is connected to the rotor 1 through a gear post 23, and the assembly is convenient.

[0030] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A two-way clutch for overload clutch between the drive motor of an automotive electric strut and a lead screw, characterized in that, Comprising: A sleeve (1), a rotor (2) and a clutch assembly (3); Wherein, the sleeve (1) is connected to an external lead screw assembly; The rotor (2) is arranged inside the sleeve (1) and is connected to an external drive motor. A plurality of groove groups (21) are provided on the outer surface of the rotor (2). An outer contact surface (22) is formed between two adjacent groove groups (21), and the outer contact surface (22) is in contact with the inner wall of the sleeve (1); Each groove group (21) is provided with the clutch assembly (3), and the clutch assembly (3) is used to achieve overload clutch between the rotor (2) and the sleeve (1); The groove group (21) includes: a left chute (211) and a right chute (212), and an inner contact surface (213) is formed between the left chute (211) and the right chute (212); Between the left chute (211) and the inner contact surface (213), and between the right chute (212) and the inner contact surface (213) are arc transition surfaces (214); The clutch assembly (3) includes: a transmission column (31) and a spring (32); wherein, the transmission column (31) is arranged on the inner contact surface (213), and the spring (32) is connected to both sides of the transmission column (31), and the spring (32) is used to provide elastic support for the transmission column (31); Both ends of the spring (32) on the left side of the transmission column (31) are respectively fixed on the left chute (211) and the left side surface of the transmission column (31); Both ends of the spring (32) on the right side of the transmission column (31) are respectively fixed on the right chute (212) and the right side surface of the transmission column (31).

2. The bi-directional clutch according to claim 1, wherein: A clamping post (11) is provided on the bottom surface of the sleeve (1); A gear post (23) is provided on the top surface of the rotor (2).

3. A clutch system, characterized in that, Comprising: A lead screw assembly (4), a drive motor (5) and the two-way clutch according to claim 1 or 2; The lead screw assembly (4) is connected to the sleeve (1) of the two-way clutch through a coupling; The drive motor (5) is connected to the rotor (2) of the two-way clutch through a speed reducer.

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