Anti-collision rotatable mechanism for automobile rearview mirror

Abstract

The utility model discloses an anti-collision rotatable mechanism for an automobile rearview mirror, which relates to the technical field of automobile rearview mirrors and comprises a mounting frame and a rotating shaft assembly, and a rotating shaft, an upper connecting arm, a lower connecting arm, a disc spring, a fixing frame, a clamping sleeve, a bolt and a limiting piece are arranged in the rotating shaft assembly. The upper connecting arm and the lower connecting arm are compressed through the disc spring to form axial pre-tightening force, the rotating shaft is arranged in the upper connecting arm, the fixing frame and the lower connecting arm, and gear ring structures meshed with each other are arranged on the end face, making contact with the fixing frame, of the lower connecting arm. According to the technical scheme provided by the utility model, by adopting the spring gear ring assembly, the mechanism can allow the rearview mirror to rotate or fold when being impacted, so that the risk of damage to pedestrians and a vehicle is reduced. The disc spring exerts axial pre-tightening force to enable the upper connecting arm and the lower connecting arm to be tightly meshed, and it is guaranteed that the structural stability and reliability can be kept under any condition.

Description

Technical Field

[0001] This utility model relates to the field of automotive rearview mirror technology, and in particular to a collision-resistant rotatable mechanism for automotive rearview mirrors. Background Technology

[0002] As an important component of a vehicle's safety system, rearview mirrors primarily expand the driver's field of vision for a better understanding of the external environment. Depending on their installation location, rearview mirrors can be categorized into exterior rearview mirrors, lower rearview mirrors, and interior rearview mirrors. Passenger cars and other light passenger vehicles are typically equipped with exterior and interior rearview mirrors, while large commercial vehicles such as buses and trucks generally have exterior, lower, and interior rearview mirrors. In particular, for some commercial vehicles, the installation height of their rearview mirrors may be less than 2 meters, increasing the risk of collisions with pedestrians or other low-lying objects. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a collision-resistant rotatable mechanism for automobile rearview mirrors, so as to solve the problems in the background art.

[0004] In view of this, the present invention provides a collision-resistant rotatable mechanism for a car rearview mirror, including a mounting bracket and a rotating shaft assembly. The rotating shaft assembly internally includes a rotating shaft, an upper connecting arm, a lower connecting arm, a disc spring, a fixing bracket, a sleeve, bolts, and a limiting component. The upper and lower connecting arms are pressed together by the disc spring to form an axial preload. The rotating shaft is disposed in the upper connecting arm, the fixing bracket, and the lower connecting arm. The end face of the lower connecting arm that contacts the fixing bracket is provided with a meshing gear ring structure. The fixing bracket is fixedly connected to the mounting bracket. The limiting component is disposed on the fixing bracket and the lower connecting arm to limit the rotation angle.

[0005] Optionally, the disc spring is sleeved on the rotating shaft, and both ends of the disc spring abut against the connecting arm and the fixing frame, respectively.

[0006] Optionally, the meshing tooth profile of the gear ring structure is an involute tooth profile, and the meshing angle between the gear ring structure and the end face of the fixing frame is in the range of 30°-60°.

[0007] Optionally, the fixing bracket is detachably connected to the ferrule by bolts, and the ferrule and the mounting bracket are connected by an interference fit.

[0008] Optionally, the limiting member includes a limiting protrusion disposed on the outer wall of the fixed frame and an arc-shaped limiting block disposed on the lower connecting arm, with a limiting angle range of 0°-100°.

[0009] Optionally, the upper connecting arm and the lower connecting arm are made of zinc alloy die casting and have an anti-rust coating on their surfaces.

[0010] Optionally, the rotating shaft has a weight-reducing through hole in the middle and positioning steps at both ends.

[0011] As can be seen from the above technical solutions, the embodiments of this utility model have the following advantages:

[0012] 1. This utility model discloses a collision-resistant rotatable mechanism for automotive rearview mirrors. By employing a spring-tooth ring assembly, this mechanism allows the rearview mirror to rotate or fold upon impact, thereby reducing the risk of damage to pedestrians and the vehicle itself. A disc spring applies axial preload, ensuring a tight engagement between the upper and lower connecting arms and maintaining structural stability and reliability under all circumstances. This mechanism utilizes a simple yet effective mechanical structure, reducing the number of parts, lowering production costs, and simultaneously improving product durability and ease of maintenance.

[0013] 2. The present invention provides a collision-resistant rotatable mechanism for a car rearview mirror, which uses an upper connecting arm and a lower connecting arm formed by die casting of zinc alloy and is coated with an anti-rust coating, thereby extending the service life and enhancing the corrosion resistance.

[0014] These features and advantages of the present invention will be disclosed in detail in the following specific embodiments and accompanying drawings. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings:

[0016] Figure 1 This is a schematic diagram of the disassembly structure of the card sleeve of this utility model;

[0017] Figure 2 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the rotating shaft assembly of this utility model;

[0019] Figure 4 This is a rear view of the overall structure of this utility model.

[0020] Explanation of reference numerals in the attached drawings: 1. Mounting bracket; 21. Rotating shaft; 22. Upper connecting arm; 23. Lower connecting arm; 231. Gear ring structure; 24. Disc spring; 25. Fixing bracket; 26. Sleeve; 27. Bolt; 28. Limiting component; 281. Limiting protrusion; 282. Arc-shaped limiting block. Detailed Implementation

[0021] The technical solutions of the present utility model will be explained and described below with reference to the accompanying drawings. However, the following embodiments are only preferred embodiments of the present utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments in the implementation methods without creative effort are all within the protection scope of the present utility model.

[0022] The following describes in detail, with reference to the accompanying drawings, an anti-collision rotatable mechanism for a car rearview mirror according to an embodiment of the present invention.

[0023] Example 1

[0024] For easier understanding, please refer to Figures 1 to 4 This utility model provides an embodiment of a collision-prevention rotatable mechanism for a car rearview mirror, comprising a mounting bracket 1 and a rotating shaft assembly. The rotating shaft assembly internally includes a rotating shaft 21, an upper connecting arm 22, a lower connecting arm 23, a disc spring 24, a fixing bracket 25, a retaining sleeve 26, bolts 27, and a limiting member 28. The upper connecting arm 22 and the lower connecting arm 23 are pressed together by the disc spring 24 to form an axial preload. The rotating shaft 21 is disposed within the upper connecting arm 22, the fixing bracket 25, and the lower connecting arm 23. The end face of the lower connecting arm 23 that contacts the fixing bracket 25 is provided with a meshing gear ring structure 231. The fixing bracket 25 is fixedly connected to the mounting bracket 1. The limiting member 28 is disposed on the fixing bracket 25 and the lower connecting arm 23 to limit the rotation angle. The fixing bracket 25 is detachably connected to the retaining sleeve 26 by bolts 27, and the retaining sleeve 26 is connected to the mounting bracket 1 by an interference fit. The disc spring 24 is sleeved on the rotating shaft 21, and the two ends of the disc spring 24 abut against the connecting arm 22 and the fixing frame 25 respectively.

[0025] It should be noted that the rotating shaft assembly consists of a rotating shaft 21, an upper connecting arm 22, a lower connecting arm 23, a disc spring 24, a fixing bracket 25, a retaining sleeve 26, a bolt 27, and a limiting member 28. The rotating shaft 21 passes sequentially through the center holes of the upper connecting arm 22, the fixing bracket 25, and the lower connecting arm 23.

[0026] The limiting component 28 consists of a limiting protrusion 281 on the outer wall of the fixing frame 25 and an arc-shaped limiting block 282 on the lower connecting arm 23. The arc length of the arc-shaped limiting block 282 corresponds to a 100° rotation angle range. When an external force causes the rearview mirror to rotate, the limiting protrusion 281 contacts the arc-shaped limiting block 282 and prevents further rotation, thus avoiding structural damage.

[0027] In some embodiments, the meshing tooth profile of the toothed ring structure 231 is an involute tooth profile, and the meshing angle between the toothed ring structure 231 and the end face of the fixing frame 25 is in the range of 30°-60°.

[0028] It should be noted that the end face of the lower connecting arm 23 that contacts the fixed frame 25 is provided with a toothed ring structure 231 with an involute tooth shape. The tooth angle is designed to be 45° (within the range of 30°-60°) to balance the contact strength and rotational resistance. The corresponding end face of the fixed frame 25 is provided with a matching toothed ring, and the two are locked by preload after meshing.

[0029] In some embodiments, the limiting member 28 includes a limiting protrusion 281 disposed on the outer wall of the fixing frame 25 and an arc-shaped limiting block 282 disposed on the lower connecting arm 23, with a limiting angle range of 0°-100°.

[0030] The upper connecting arm 22 and the lower connecting arm 23 are made of zinc alloy by die casting, and the surface is coated with an anti-rust coating. Both the upper connecting arm 22 and the lower connecting arm 23 are made of zinc alloy by die casting, and the surface is electroplated for anti-rust treatment to improve corrosion resistance.

[0031] The rotating shaft 21 has a weight-reducing through hole in the middle and positioning steps at both ends. The weight-reducing through hole in the middle of the rotating shaft 21 reduces the overall weight while ensuring structural strength. The positioning steps at both ends of the rotating shaft 21 are used to limit the axial displacement of the connecting arm.

[0032] Working principle: The upper connecting arm 22 and the lower connecting arm 23 are pressed together by a disc spring 24 to form an axial preload. This ensures that the entire rotating shaft assembly maintains a tight engagement even under normal driving conditions, guaranteeing the stability and reliability of the rearview mirror. The rotating shaft 21 runs through the upper connecting arm 22, the mounting bracket 25, and the lower connecting arm 23. When the contact end face between the lower connecting arm 23 and the mounting bracket 25 is provided with a meshing gear ring structure 231, and the tooth profile of the gear ring structure 231 is an involute tooth profile, it ensures smooth and accurate rotation. The meshing angle range of the gear ring structure is 30°-60°, which not only enhances the rotational accuracy but also allows the rearview mirror to flexibly adjust the viewing angle within a certain range.

[0033] When a car rearview mirror is involved in a side collision, the preload provided by the disc spring 24 temporarily disengages the gear ring structure 231 between the lower connecting arm 23 and the fixing bracket 25, allowing the rearview mirror to rotate around the rotation axis 21 at a certain angle to avoid the collision. The limiting protrusion 281 and the arc-shaped limiting block 282 on the limiting member 28 limit the rotation angle range to 0°-100°, preventing damage caused by excessive rotation. Once the collision pressure disappears, the axial preload provided by the disc spring 24 will cause the upper and lower connecting arms to re-engage, restoring the rearview mirror to its original position and ensuring that it continues to perform its intended field of vision expansion function. The upper connecting arm 22 and the lower connecting arm 23 are made of zinc alloy die-casting and have an anti-rust coating on their surface, which increases structural strength and improves corrosion resistance. In addition, a weight-reducing through hole is provided in the middle of the rotation axis 21, further improving the overall durability and service life.

[0034] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A collision-resistant rotatable mechanism for a car rearview mirror, comprising a mounting bracket (1) and a rotating shaft assembly, characterized in that: The rotating shaft assembly is internally provided with a rotating shaft (21), an upper connecting arm (22), a lower connecting arm (23), a disc spring (24), a fixing frame (25), a sleeve (26), a bolt (27), and a limiting member (28). The upper connecting arm (22) and the lower connecting arm (23) are pressed together by the disc spring (24) to form an axial preload. The rotating shaft (21) is disposed in the upper connecting arm (22), the fixing frame (25), and the lower connecting arm (23). The end face of the lower connecting arm (23) that contacts the fixing frame (25) is provided with a meshing gear ring structure (231). The fixing frame (25) is fixedly connected to the mounting frame (1). The limiting member (28) is disposed on the fixing frame (25) and the lower connecting arm (23) to limit the rotation angle.

2. The anti-collision rotatable mechanism for a car rearview mirror according to claim 1, characterized in that: The disc spring (24) is sleeved on the rotating shaft (21), and the two ends of the disc spring (24) abut against the connecting arm (22) and the fixing frame (25) respectively.

3. The anti-collision rotatable mechanism for a car rearview mirror according to claim 1, characterized in that: The meshing tooth profile of the toothed ring structure (231) is an involute tooth profile, and the meshing angle between the toothed ring structure (231) and the end face of the fixing frame (25) is in the range of 30°-60°.

4. The anti-collision rotatable mechanism for a car rearview mirror according to claim 1, characterized in that: The fixing bracket (25) is detachably connected to the sleeve (26) by bolts (27), and the sleeve (26) is connected to the mounting bracket (1) by an interference fit.

5. The anti-collision rotatable mechanism for a car rearview mirror according to claim 1, characterized in that: The limiting member (28) includes a limiting protrusion (281) disposed on the outer wall of the fixed frame (25) and an arc-shaped limiting block (282) disposed on the lower connecting arm (23), with a limiting angle range of 0°-100°.

6. The anti-collision rotatable mechanism for a car rearview mirror according to claim 1, characterized in that: The upper connecting arm (22) and the lower connecting arm (23) are made of zinc alloy die casting and have an anti-rust coating on the surface.

7. The anti-collision rotatable mechanism for a car rearview mirror according to claim 1, characterized in that: The rotating shaft (21) has a weight-reducing through hole in the middle and positioning steps at both ends.

Images