Swing arm structure of automobile sensor

Abstract

The utility model provides a swing arm structure of an automobile sensor, which comprises a shell and a swing arm, one end of the swing arm is provided with a connecting column, the shell is provided with a connecting groove which is rotatably connected with the connecting column, one end of the swing arm is also provided with an encircling part which is coaxial with the connecting column and is spaced from the connecting column, and the encircling part is embraced on the shell at the upper end of the connecting groove and is rotatably connected with the connecting groove. The connecting column and the inner wall of the connecting groove are arranged in a spaced mode, and a supporting part is arranged between the connecting column and the inner wall of the connecting groove. The supporting part is arranged between the connecting column and the inner wall of the connecting groove, so that the problem of shaking possibly caused by a gap between the connecting column and the connecting groove is solved, the swinging stability of the swing arm is improved, and the service life of the swing arm is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of height sensor technology, specifically to a swing arm structure for an automotive sensor. Background Technology

[0002] In the automotive industry, vehicle height sensors play a crucial role in vehicle stability, comfort, and the precise control of related systems. (Reference) Figure 1 As shown in the utility model patent with patent application number CN202222259919.5, a vehicle height sensor housing with a detachable sealing structure includes a housing 1 and a swing arm 2, which are rotatably connected. One end of the swing arm 2 is provided with a cylindrical connecting post 3, and the housing 1 is provided with a connecting groove 4 rotatably connected to it; the other end of the swing arm 2 is also provided with an annular circumferential part 5 coaxial with and spaced from the connecting post 3, which hugs the housing 1 and forms a rotatable connection.

[0003] To reduce the rotational resistance of the control arm 2, the design incorporates a gap 6 between the connecting post 3 and the inner wall of the connecting groove 4 to minimize friction. However, during long-term rotation of the control arm 2, this gap 6 can cause the control arm 2 to wobble. This wobble not only affects the accuracy of the vehicle height sensor's measurements, causing the vehicle suspension control system and automatic headlight adjustment system to malfunction based on changes in vehicle height, thus impacting vehicle stability and comfort, but it can also accelerate the wear of the control arm and related connecting components, reducing component lifespan and increasing vehicle maintenance costs and safety hazards. Utility Model Content

[0004] In view of the problems pointed out in the background art, this utility model proposes a swing arm structure for an automotive sensor to solve the above-mentioned technical problems.

[0005] The technical solution of this utility model is implemented as follows:

[0006] A swing arm structure for an automotive sensor includes a housing and a swing arm. One end of the swing arm is provided with a connecting post, and the housing is provided with a connecting groove for rotatable connection of the connecting post. One end of the swing arm is also provided with a circumferential portion coaxial with and spaced from the connecting post. The circumferential portion holds the housing at the upper end of the connecting groove and forms a rotatable connection. The connecting post and the inner wall of the connecting groove are spaced apart, and a support portion is provided between the connecting post and the inner wall of the connecting groove.

[0007] The present invention is further configured such that the support part is a ball bearing, and the side wall of the connecting column and the side wall of the connecting groove are respectively provided with annular rolling grooves, and the ball bearing is connected in the rolling groove.

[0008] The present invention is further configured such that the ball bearings are provided in a plurality of form.

[0009] The present invention is further configured such that the support part is a circular metal ring, which is sleeved on the connecting column. After the swing arm is installed, the outer wall of the metal ring is in contact with the side wall of the connecting groove.

[0010] The present invention is further provided that the outer wall of the connecting column is provided with an annular embedding groove for connecting with the metal ring.

[0011] The present invention is further configured such that the outer surface of the metal ring is an arc surface.

[0012] The present invention is further configured such that the metal ring is rotatably connected to the connecting column.

[0013] The present invention is further provided that the connecting column is provided with a weight reduction hole that extends upward and penetrates the swing arm.

[0014] The present invention is further configured such that a tooth-like interlocking structure is formed between the circumferential portion and the shell to axially restrict the connecting column and the shell.

[0015] The present invention is further configured such that the ball or metal ring is positioned near the lower end of the connecting post.

[0016] By adopting the above technical solution, the beneficial effects of this utility model are as follows:

[0017] The swing arm structure of the automotive sensor provided by this utility model solves the problem of swaying that may be caused by the gap between the connecting column and the connecting groove by setting a support part between the inner wall of the connecting column and the connecting groove, thereby improving the stability of the swing arm swing and extending its service life. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the existing technology.

[0020] Figure 2 This is a schematic diagram of the structure of embodiment one of this utility model.

[0021] Figure 3 This utility model Figure 2 Enlarged view of part A in the image.

[0022] Figure 4 This is a schematic diagram of the second embodiment of the present utility model.

[0023] Figure 5 This utility model Figure 4 Enlarged view of part B in the image.

[0024] The following are the labels in the attached diagram: 1. Housing; 2. Swing arm; 3. Connecting column; 4. Connecting groove; 5. Encircling part; 6. Gap; 7. Ball bearing; 8. Rolling groove; 9. Metal ring; 10. Embedding groove; 11. Weight reduction hole. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] For reference as follows Figures 1-5 The present invention will be described as follows:

[0027] Example: A swing arm structure for an automotive sensor includes a housing 1 and a swing arm 2. One end of the swing arm 2 is provided with a connecting post 3. The housing 1 is provided with a connecting groove 4 that is rotatably connected to the connecting post 3. One end of the swing arm 2 is also provided with a circumferential part 5 that is coaxial with and spaced apart from the connecting post 3. The circumferential part 5 holds the housing 1 at the upper end of the connecting groove 4 and forms a rotatable connection. The connecting post 3 and the inner wall of the connecting groove 4 are spaced apart to form a gap 6 to reduce friction.

[0028] A support portion is provided between the inner walls of the connecting column 3 and the connecting groove 4. By providing a support portion between the inner walls of the connecting column 3 and the connecting groove 4, effective radial support for the connecting column 3 is formed.

[0029] The support directly acts on the gap 6 between the connecting column 3 and the inner wall of the connecting groove 4. In the prior art, while the existence of this gap 6 can reduce the frictional resistance between the connecting column 3 and the inner wall of the connecting groove 4, it also makes it possible for the connecting column 3 to undergo radial displacement within the gap 6, which in turn causes the swing arm 2 to sway with the connecting column 3. The support, however, can fill or reduce the effective movement space of the gap 6 in the radial direction, limiting the unnecessary radial movement of the connecting column 3 within the gap 6.

[0030] When the swing arm 2 rotates, the connecting column 3 rotates relative to the connecting groove 4 around its axis, and the support part maintains a reasonable contact or fit with the connecting column 3 and the inner wall of the connecting groove 4. On the one hand, the support part does not significantly increase the frictional resistance when the connecting column 3 rotates, and can still maintain the flexibility of the swing arm 2 rotation; on the other hand, the support part can bear the radial force generated by the connecting column 3 due to the weight of the swing arm 2 itself, external vibration and other factors, and prevent the connecting column 3 from swaying within the gap 6, thereby avoiding unnecessary swinging deviation of the swing arm 2 with the connecting column 3.

[0031] In terms of long-term performance, this suppression of the wobbling of the connecting post 3 directly improves the stability of the swing arm 2's swing. Stable swing of the swing arm 2 reduces additional collisions and friction between it and the housing 1 caused by wobbling, lowering the wear rate of components such as the swing arm 2, connecting post 3, and connecting groove 4, thereby extending the service life of these components. Simultaneously, the stable swing characteristics also help ensure the accuracy of signals acquired by the automotive sensors through the swing arm 2, providing structural protection for the normal operation of the sensors.

[0032] In summary, the introduction of the support component effectively solves the problem of swing arm 2 swaying that may be caused by the presence of gap 6, while maintaining the low frictional resistance between the connecting column 3 and the connecting groove 4, thereby improving the swing stability of the swing arm 2 and extending its service life.

[0033] This application provides the following two implementation structures for the support structure:

[0034] Implementation Structure 1: The support part is a ball bearing 7, and the side wall of the connecting column 3 and the side wall of the connecting groove 4 are respectively provided with annular rolling grooves 8. The ball bearing 7 is connected in the rolling grooves 8 to form a rolling fit relationship.

[0035] Several balls 7 are provided. The multiple balls 7 are distributed circumferentially along the rolling groove 8, which can form radial support for the connecting column 3. This enhances the restriction effect on the radial displacement of the connecting column 3.

[0036] The ball bearing 7 is positioned near the lower end of the connecting column 3. The lower end of the connecting column 3 is the area where the force is concentrated during its rotation. Placing the ball bearing 7 here can more directly bear the radial force generated by the weight of the swing arm 2 and external vibrations on the connecting column 3, thereby improving the efficiency of suppressing the swaying of the connecting column 3.

[0037] During operation, when the swing arm 2 drives the connecting column 3 to rotate relative to the connecting groove 4, the balls 7 roll within the rolling groove 8. Compared to sliding friction, rolling friction has less resistance. Therefore, the arrangement of several balls 7 achieves radial constraint on the connecting column 3 without significantly increasing the frictional resistance of the connecting column 3's rotation, thus ensuring the flexibility of the swing arm 2's rotation. Furthermore, the rolling groove 8 acts as a limit for the balls 7, preventing them from disengaging from their mating positions during rolling and ensuring the long-term stable operation of the support component.

[0038] Implementation Structure Two: The support part is a circular metal ring 9, which is fitted onto the connecting column 3. After the swing arm 2 is installed, the outer wall of the metal ring 9 is in contact with the side wall of the connecting groove 4.

[0039] The outer side wall of the connecting post 3 is provided with an annular embedding groove 10 that connects to the metal ring 9, so as to realize the assembly of the metal ring 9 and the connecting post 3.

[0040] The outer surface of the metal ring 9 is an arc surface. After the swing arm 2 is installed, the outer wall of the metal ring 9 contacts the side wall of the connecting groove 4. The arc surface design allows the metal ring 9 and the side wall of the connecting groove 4 to form a point or line contact, which reduces the contact area between the two while ensuring contact stability, thereby reducing frictional resistance.

[0041] The metal ring 9 is rotatably connected to the connecting post 3. This prevents the metal ring 9 from becoming stuck and unable to rotate due to jamming with the side wall of the connecting groove 4.

[0042] The metal ring 9 is positioned near the lower end of the connecting post 3. This is consistent with the design principle of the ball bearing 7 in Implementation Structure 1, effectively bearing the radial force at the lower end of the connecting post 3 and enhancing the suppression of the connecting post 3's sway.

[0043] The embedded groove 10 serves to axially limit the metal ring 9, preventing axial displacement of the metal ring 9 on the connecting post 3 and ensuring stable contact between the metal ring 9 and the side wall of the connecting groove 4. Furthermore, the metal ring 9 adopts a circular structure, which, when fitted onto the connecting post 3, provides uniform circumferential support to the connecting post 3, preventing uneven local stress on the connecting post 3.

[0044] Both implementation structures, through specific structural designs, achieve radial constraint on the connecting column 3 to solve the swaying problem, while also taking into account the rotational flexibility of the swing arm 2, and can adapt to long-term rotating working environments, providing a specific and feasible structural solution for the stability of the swing arm 2 and the extension of its service life.

[0045] The connecting column 3 is provided with a weight-reducing hole 11 extending upward and penetrating through the swing arm 2. The weight-reducing hole 11 directly reduces the amount of material used in the connecting column 3 and the swing arm 2, thereby reducing the overall mass of the swing arm 2. With the weight of the swing arm 2 reduced, the inertial force during its rotation is also reduced. This not only reduces the external force required to drive the swing arm 2 to rotate, making the rotation of the swing arm 2 lighter and more flexible, but also reduces the load of the swing arm 2 on the connecting column 3, connecting groove 4 and other related connecting components, reducing the risk of fatigue damage to the components due to long-term stress.

[0046] The circumferential portion 5 and the housing 1 form a tooth-like interlocking structure to axially restrict the connecting post 3 and the housing 1. When the circumferential portion 5 grips the housing 1, the tooth-like structures of the two interlock. This interlocking relationship can effectively limit the relative displacement of the connecting post 3 and the housing 1 in the axial direction, preventing the connecting post 3 from dislodging from the connecting groove 4 or from axially moving.

[0047] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A swing arm structure for an automotive sensor, comprising a housing and a swing arm, wherein one end of the swing arm is provided with a connecting post, the housing is provided with a connecting groove for rotatable connection of the connecting post, and one end of the swing arm is also provided with a circumferential portion coaxial with and spaced from the connecting post, the circumferential portion holding the housing at the upper end of the connecting groove and forming a rotatable connection, the connecting post and the inner wall of the connecting groove being spaced apart, characterized in that: A support is provided between the inner wall of the connecting column and the connecting groove.

2. The swing arm structure of an automotive sensor according to claim 1, characterized in that: The support part is a ball bearing, and annular rolling grooves are provided on the side wall of the connecting column and the side wall of the connecting groove, and the ball bearing is connected in the rolling groove.

3. The swing arm structure of an automotive sensor according to claim 2, characterized in that: The ball bearings are provided in a plurality of units.

4. The swing arm structure of an automotive sensor according to claim 1, characterized in that: The support part is a circular metal ring, which is fitted onto the connecting column. After the swing arm is installed, the outer wall of the metal ring is in contact with the side wall of the connecting groove.

5. The swing arm structure of an automotive sensor according to claim 4, characterized in that: The outer wall of the connecting column is provided with an annular embedding groove for connecting with the metal ring.

6. The swing arm structure of an automotive sensor according to claim 4, characterized in that: The outer surface of the metal ring is an arc surface.

7. The swing arm structure of an automotive sensor according to claim 4, characterized in that: The metal ring is rotatably connected to the connecting post.

8. The swing arm structure of an automotive sensor according to claim 1, characterized in that: The connecting column is provided with a weight-reducing hole that extends upward and passes through the swing arm.

9. The swing arm structure of an automotive sensor according to claim 1, characterized in that: The encircling part and the shell form a tooth-like interlocking structure to axially restrict the connecting column and the shell.

10. The swing arm structure of an automotive sensor according to claim 2 or 4, characterized in that: The ball bearing or metal ring is positioned near the lower end of the connecting post.

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