Skid mechanism of automobile rearview mirror driver

Abstract

The utility model discloses a slipping mechanism of an automobile rearview mirror driver, which comprises a rotating shaft, a first gear, a second gear and an elastic piece are sequentially sleeved on the rotating shaft, a limit disc and a limit piece which are sleeved on the rotating shaft are arranged between the first gear and the second gear, the limit disc is provided with a first groove, the limit piece is embedded in the first groove, and the elastic piece is arranged in the first groove. One end of the limiting piece is connected with one end of the first gear in a matched mode, the side wall of the first groove is connected with the second gear in a matched mode, the elastic piece abuts against the second gear so that the second gear, the limiting piece, the limiting disc and the first gear can abut against each other in a matched mode, and therefore the second gear drives the first gear to be linked. By additionally arranging the limiting piece and the limiting disc, three friction surfaces of the second gear and the limiting piece, the limiting piece and the limiting disc and the limiting disc and the first gear are formed, the number of the friction surfaces is increased, friction force is enhanced, and the slipping effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile accessories, in particular to a sliding mechanism of an automobile rearview mirror driver. Background Art

[0002] Currently, the angle adjustment mechanism of existing automobile rearview mirrors can adjust the mirror angle and visual range, thereby providing the driver with an optimal rear view. The mirror drive of the automobile rearview mirror usually achieves the adjustment purpose through the cooperation of a transmission device and a straight rack or an arc rack. However, this type of automatically adjustable rearview mirror often causes the mirror to break due to over-travel of the mirror.

[0003] To overcome the problem of mirror cracking caused by rack rotation reaching its extreme position, existing technologies typically employ a slipping mechanism. This mechanism disengages the output gear from the transmission gear, causing slippage, thereby preventing the mirror from cracking due to continued force applied by the transmission mechanism at its extreme position. However, existing slipping mechanisms typically achieve both transmission and slipping through surface-to-surface contact. This reduces the friction surface area for slipping, leaving room for improvement. Summary of the Invention

[0004] The embodiment of the present application provides a slipping mechanism for a car rearview mirror driver, and by adding a limiting plate and a limiting plate, three friction surfaces are formed between the second gear and the limiting plate, between the limiting plate and the limiting plate, and between the limiting plate and the first gear, thereby increasing the number of friction surfaces, strengthening the friction force, and improving the slipping effect.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a sliding mechanism of a car rearview mirror driver, comprising a rotating shaft, on which a first gear, a second gear, and an elastic member are sequentially sleeved, a limit plate and a limit piece sleeved on the rotating shaft are provided between the first gear and the second gear, the limit plate is provided with a first groove, the limit piece is embedded in the inside of the first groove, one end of the limit piece is matched with one end of the first gear, the side wall of the first groove is matched with the second gear, the elastic member is pressed against the second gear so that the second gear, the limit piece, the limit plate, and the first gear are pressed against each other, thereby making the second gear drive the first gear in linkage.

[0006] Compared with the prior art, the advantages of the present invention are:

[0007] When the second gear rotates, the second gear is pressed against one end of the limit plate, thereby driving the limit plate to rotate. At the same time, the other end of the limit plate is pressed against one end of the limit plate, and the second gear is cooperated and connected with the side wall of the first groove of the limit plate, driving the limit plate to rotate. At the same time, the other end of the limit plate is pressed against one end of the first gear, and the limit plate is cooperated and connected with one end of the first gear, driving the first gear to rotate. Therefore, when the rearview mirror of the car rotates to the extreme position, as the resistance encountered by the first gear increases, the static friction between the first gear and the second gear is overcome, and the first gear and the second gear rotate relative to each other. The friction between the second gear and the limit plate, the limit plate and the limit plate, and the limit plate and the first gear is achieved, thereby achieving slipping. Compared with the prior art in which there is only one friction surface, the slipping effect is improved. Secondly, the structure of the slipping mechanism is very compact, and it is more stable and reliable than the slipping mechanism with a complex structure in the prior art.

[0008] As an improvement, a plurality of first protrusions are provided at the upper end of the first groove along the circumferential direction, and a second groove corresponding to the first protrusion is provided on the lower end face of the second gear. The first protrusion is inserted into the second groove, and the first protrusion is inserted into the second groove, so that the second gear is connected to the limit plate in a limiting manner.

[0009] As an improvement, the upper end face of the first gear is provided with several second protrusions along the circumferential direction, the limiting plate is provided with a first through hole, the limiting plate is provided with a second through hole corresponding to the second protrusion, the lower end of the side wall of the second protrusion is abutted against the side wall of the first through hole, the upper end of the second protrusion is inserted into the second through hole, the second through hole is adapted to the shape of the second protrusion, the upper end of the second protrusion is inserted into the second through hole, the lower end of the side wall of the second protrusion is abutted against the side wall of the first through hole, and while the limiting plate is limitedly connected to the first gear, the limiting plate is also limited to prevent the limiting plate from radial displacement.

[0010] As an improvement, the lower end face of the limiting plate is provided with a third protrusion which is staggered with the second through hole along the circumferential direction, the upper end of the side wall of the third protrusion is abutted against the side wall of the first through hole, and the lower end of the third protrusion is inserted between adjacent second protrusions so that the lower end face of the third protrusion is abutted against the upper end face of the first gear. The lower end face of the limiting plate is provided with a third protrusion and the upper end of the side wall of the third protrusion is abutted against the side wall of the first through hole, and the lower end of the third protrusion is inserted between adjacent second protrusions so that the lower end face of the third protrusion is abutted against the upper end face of the first gear, thereby further strengthening the limiting connection between the limiting plate and the first gear and the limiting of the limiting plate.

[0011] As an improvement, the upper end faces of the limiting plate, limiting plate and first gear are concave, and the lower end faces of the second gear, limiting plate and limiting plate are convex. By setting the end faces concave or convex, the contact area can be increased, thereby improving the friction between the components.

[0012] As an improvement, a limit block is also sleeved on the rotating shaft, the limit block is threadedly connected to the rotating shaft, the second gear is provided with a third groove, the elastic member is arranged inside the third groove, the upper end of the elastic member is against the limit block, and the lower end of the elastic member is against the bottom surface of the third groove. The elastic member is arranged inside the third groove, which provides space for the installation of the elastic member, making the structure more compact. The limit block is against the upper end of the elastic member, and the position of the limit block on the rotating shaft can be adjusted, so that the degree of tightness between the elastic member and the second gear can be adjusted. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0014] Figure 1 An exploded diagram of a sliding mechanism of a car rearview mirror actuator;

[0015] Figure 2 The figure is a cross-sectional schematic diagram of a sliding mechanism of a vehicle rearview mirror drive.

[0016] The marks in the above figure are: 1. rotating shaft; 2. first gear; 2.1. second protrusion; 3. second gear; 3.1. second groove; 3.2. third groove; 4. elastic member; 5. limiting plate; 5.1. first groove; 5.2. first protrusion; 5.3. first through hole; 6. limiting plate; 6.1. second through hole; 6.2. third protrusion; 7. limiting block. DETAILED DESCRIPTION

[0017] In the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "planar direction", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 understood as a limitation on the present invention.

[0018] like Figures 1 to 2As shown, a slip mechanism of a rearview mirror drive for an automobile comprises a rotating shaft 1, on which a first gear 2, a limiting plate 5, a limiting piece 6, a second gear 3, an elastic member 4, and a limiting block 7 are sequentially sleeved, the limiting plate 5 being provided with a first groove 5.1, the limiting piece 6 being embedded in the first groove 5.1, the upper end surface of the first gear 2 being circumferentially provided with a plurality of second protrusions 2.1, the limiting plate 5 being provided with a first through hole 5.3, the limiting piece 6 being provided with a second through hole 6.1 corresponding to the second protrusion 2.1, the lower end of the side wall of the second protrusion 2.1 being abutted against the side wall of the first through hole 5.3, the upper end of the second protrusion 2.1 being inserted into the second through hole 6.1, the second through hole 6.1 being adapted to the shape of the second protrusion 2.1, the lower end surface of the limiting piece 6 being circumferentially provided with third protrusions 6.2 staggered with the second through holes 6.1, The upper end of the side wall of the third protrusion 6.2 abuts against the side wall of the first through hole 5.3, and the lower end of the third protrusion 6.2 is inserted between the adjacent second protrusions 2.1 so that the lower end surface of the third protrusion 6.2 abuts against the upper end surface of the first gear 2. The upper end of the first groove 5.1 is provided with a plurality of first protrusions 5.2 along the circumferential direction, and the lower end surface of the second gear 3 is provided with a second groove 3.1 corresponding to the first protrusion 5.2. The first protrusion 5.2 is inserted into the second groove 3.1, and the second gear 3 is provided with a third groove 3.2. The elastic member 4 is provided inside the third groove 3.2, and the upper end of the elastic member 4 abuts against the limit block 7, and the lower end of the elastic member 4 abuts against the bottom surface of the third groove 3.2, so that the second gear 3, the limit plate 6, the limit plate 5, and the first gear 2 are tightly fitted with each other, so that the second gear 3 drives the first gear 2 to drive the linkage.

[0019] The upper end surfaces of the limiting piece 6 , the limiting plate 5 , and the first gear 2 are concavely arranged, and the lower end surfaces of the second gear 3 , the limiting piece 6 , and the limiting plate 5 are convexly arranged.

[0020] During normal operation, the driving assembly meshes with the second gear 3 and drives the second gear 3 to rotate. The second gear 3 is tightly pressed against one end of the limiting plate 6, thereby driving the limiting plate 6 to rotate. The other end of the limiting plate 6 is tightly pressed against one end of the limiting plate 5, and the second gear 3 is cooperated and connected with the side wall of the first groove 5.1 of the limiting plate 5, driving the limiting plate 5 to rotate. The other end of the limiting plate 5 is tightly pressed against one end of the first gear 2, and the limiting plate 6 is cooperated and connected with one end of the first gear 2, driving the first gear 2 to rotate. The first gear 2 is meshed with the transmission assembly and drives the rearview mirror of the car to rotate. When the rearview mirror of the car rotates to the limit position, as the resistance encountered by the first gear 2 increases, the first gear 2 is restricted from continuing to rotate. The first gear 2 and the second gear 3 rotate relative to each other, and slipping is achieved by friction between the second gear 3 and the limiting plate 6, the limiting plate 6 and the limiting plate 5, and the limiting plate 5 and the first gear 2.

[0021] The above is an exemplary description of the present invention in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the scope of protection of the present invention.

Claims

1. A sliding mechanism for a rearview mirror driver of an automobile, comprising a rotating shaft (1), wherein a first gear (2), a second gear (3), and an elastic member (4) are sequentially sleeved on the rotating shaft (1), characterized in that: A limiting plate (5) and a limiting piece (6) sleeved on the rotating shaft (1) are provided between the first gear (2) and the second gear (3); the limiting plate (5) is provided with a first groove (5.1); the limiting piece (6) is embedded in the interior of the first groove (5.1); one end of the limiting piece (6) is matched with one end of the first gear (2); the side wall of the first groove (5.1) is matched with the second gear (3); the elastic member (4) is pressed against the second gear (3) so that the second gear (3), the limiting piece (6), the limiting plate (5) and the first gear (2) are pressed against each other, thereby enabling the second gear (3) to drive the first gear (2) in linkage.

2. The sliding mechanism of a vehicle rearview mirror actuator according to claim 1, characterized in that: The upper end of the first groove (5.1) is provided with a plurality of first protrusions (5.2) along the circumferential direction, the lower end surface of the second gear (3) is provided with a second groove (3.1) corresponding to the first protrusions (5.2), and the first protrusions (5.2) are inserted into the second grooves (3.1).

3. The sliding mechanism of the automobile rearview mirror actuator according to claim 1, characterized in that: The upper end surface of the first gear (2) is provided with a plurality of second protrusions (2.1) along the circumferential direction, the limiting plate (5) is provided with a first through hole (5.3), the limiting plate (6) is provided with a second through hole (6.1) corresponding to the second protrusion (2.1), the lower end of the side wall of the second protrusion (2.1) abuts against the side wall of the first through hole (5.3), the upper end of the second protrusion (2.1) is inserted into the second through hole (6.1), and the second through hole (6.1) is adapted to the shape of the second protrusion (2.1).

4. The sliding mechanism of the automobile rearview mirror actuator according to claim 3, characterized in that: The lower end surface of the limiting piece (6) is provided with a third protrusion (6.2) staggered with the second through hole (6.1) along the circumferential direction; the upper end of the side wall of the third protrusion (6.2) abuts against the side wall of the first through hole (5.3); the lower end of the third protrusion (6.2) is inserted between adjacent second protrusions (2.1) so that the lower end surface of the third protrusion (6.2) abuts against the upper end surface of the first gear (2).

5. The sliding mechanism of the automobile rearview mirror actuator according to claim 1, characterized in that: The upper end surfaces of the limiting plate (6), the limiting disk (5) and the first gear (2) are concavely arranged, and the lower end surfaces of the second gear (3), the limiting plate (6) and the limiting disk (5) are convexly arranged.

6. The sliding mechanism of a vehicle rearview mirror actuator according to claim 1, characterized in that: A limit block (7) is also sleeved on the rotating shaft (1), and the limit block (7) is threadedly connected to the rotating shaft (1). The second gear (3) is provided with a third groove (3.2), and the elastic member (4) is arranged inside the third groove (3.2). The upper end of the elastic member (4) abuts against the limit block (7), and the lower end of the elastic member (4) abuts against the bottom surface of the third groove (3.2).

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