A vehicle controller bushing assembly and a vehicle controller

Abstract

This invention relates to the field of vehicle control technology, specifically to a vehicle controller bushing assembly and a vehicle controller. The vehicle controller bushing assembly includes a bushing and a pin. The bushing is cylindrical, and the pin is fitted inside the bushing and movable along the extension direction of the bushing. The bushing includes an inner annular surface, which includes two opposing arc segments and a connecting segment. The two arc segments are spaced apart along the forward direction of the vehicle, and the two connecting segments are respectively disposed between the two arc segments. The distance between the two connecting segments is equal to the diameter of the pin. A first gap is provided between the arc segments and the outer surface of the pin, and the connecting segment abuts against the outer circumferential surface of the pin. This solves the problems of noise and poor operation of traditional brake bushing assemblies during use.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle control, in particular to a vehicle controller bushing assembly and a vehicle controller. BACKGROUND

[0002] The deceleration braking process of a vehicle is driven by the brake to squeeze the brake caliper and the brake disc to generate braking force. During the braking process of the brake, a guide structure is provided to guide the moving direction of the brake caliper and other structures, which needs to be completely perpendicular to the lateral surface of the brake disc, so as to ensure that the brake caliper is fully and uniformly abutted to the brake disc, thereby being able to generate uniform braking force.

[0003] However, during the braking process of the brake, especially the heavy load braking of a commercial vehicle, the brake disc, brake caliper body, bracket and other components will bear a huge force and thermal deformation, so that the entire brake is in a high temperature state, which may cause the guide structure to be squeezed and further cause the brake to not only generate high-frequency vibration, such as screeching sound, creaking sound, etc., but also cause the guide direction of the brake caliper to deviate and affect the braking effect, especially in the downhill and other scenarios that require frequent braking. SUMMARY

[0004] To solve the problem that the traditional brake bushing assembly generates noise and has poor running condition during use, the present application provides a vehicle controller bushing assembly and a vehicle controller.

[0005] The first aspect of the present application provides a vehicle controller bushing assembly, comprising: a bushing and a pin; the bushing is cylindrical, the pin is sleeved in the bushing and can move along the extension direction of the bushing, the bushing comprises an inner annular surface, the inner annular surface comprises two oppositely arranged circular arc segments and connecting segments, the two circular arc segments are arranged at intervals along the forward direction of the vehicle, the two connecting segments are arranged between the two circular arc segments respectively, the interval distance between the two connecting segments is equal to the diameter of the pin, a first gap is arranged between the circular arc segment and the outer side surface of the pin, and the connecting segment abuts against the outer peripheral surface of the pin.

[0006] In some embodiments, the central angle of the circular arc segment is 160°-180°, the outer peripheral surface of the pin is provided with a fitting portion, the fitting portion is correspondingly arranged with the connecting segment, and the fitting portion can be fitted to the connecting segment.

[0007] In some embodiments, the two ends of the inner annular surface along the forward direction of the vehicle are provided with fixing grooves, and the bushing further comprises an abutting column arranged in the fixing groove, part of the abutting column protrudes out of the fixing groove, and a second gap is formed between the abutting column and the outer peripheral surface of the pin.

[0008] In some embodiments, the bottom surface of the fixing groove is arc-shaped, the side of the abutting column facing the fixing groove is provided with a fixing surface, the fixing surface is matched with the shape of the fixing groove, the side of the abutting column facing the bushing comprises a limiting surface, the outer circumferential surface of the column pin is a cylindrical surface, the limiting surface is a plane, and the limiting surface can abut against the outer circumferential surface of the column pin to limit the rotation of the abutting column.

[0009] In some embodiments, the depth of the fixing groove is 40% to 60% of the wall thickness of the bushing at the location of the fixing groove.

[0010] In some embodiments, the middle part of the fixing surface is provided with a communication groove, the communication groove is arranged around the fixing surface, and the two ends of the communication groove extend to the limiting surface, respectively.

[0011] In some embodiments, the limiting surface is provided with a first oil storage groove, and the first oil storage groove extends in the axial direction of the abutting column.

[0012] In some embodiments, the inner circumferential wall of the bushing is uniformly provided with a plurality of second oil storage grooves.

[0013] In some embodiments, the second oil storage groove extends in the extension direction of the bushing; and the second oil storage groove is arranged to be curved in the circumferential direction of the bushing.

[0014] The second aspect of the application provides a vehicle controller, which comprises a jaw body and the vehicle controller bushing assembly in the above technical solution, and the jaw body is provided with a mounting hole, and the bushing is arranged in the mounting hole.

[0015] To solve the problem that the traditional brake bushing assembly generates noise and has poor running condition in use, the application has the following advantages:

[0016] In the above technical solution, the inner annular surface matched with the pin of the bushing is arranged as including two oppositely arranged circular arc segments and connecting segments, so that the inner annular surface forms an elliptical cylindrical surface or a waist-shaped hole structure, and the longer axis of the inner annular surface extends along the vehicle running direction, and the distance between the two sides in the vertical direction is shorter, so that there is a first gap between the pin and the inner annular surface of the bushing on the two sides along the vehicle running direction. During use, a large amount of heat is generated due to friction and the like, and is transmitted to the bushing assembly, so that the bushing and the pin are thermally expanded. However, due to the difference in structure and material between the bushing and the pin, the expansion modes and expansion coefficients of the two are different. Therefore, when the temperature is high, the two are squeezed, worn, even stuck and locally stress concentrated. The first gap specially arranged in the inner hole of the traditional bushing allows the pin to slightly swing in the direction of the long axis of the inner annular surface after thermal expansion, so as to adapt to the deviation caused by thermal expansion, without unnatural deformation of the bushing or hard contact friction, thereby effectively absorbing the inevitable deformation and angle deviation of the vehicle controller during operation, avoiding friction vibration and noise caused by forced constraint. Meanwhile, the two oppositely arranged connecting segments in the inner annular surface can cooperate with the outer circumferential surface of the bushing and guide the movement of the pin, so that the above technical solution can guide and limit the movement of the pin while preventing abnormal noise and wear under high temperature. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 A vehicle controller bushing assembly structure schematic diagram of an embodiment is shown.

[0018] Figure 2 A top view structure schematic diagram of a bushing of an embodiment is shown.

[0019] Figure 3 A vehicle controller bushing assembly cross-sectional structure schematic diagram of an embodiment is shown.

[0020] Figure 4 A pin structure schematic diagram of an embodiment is shown.

[0021] Figure 5 A bushing structure schematic diagram of an embodiment is shown.

[0022] Figure 6 A structure schematic diagram of an abutting column of an embodiment is shown.

[0023] Reference signs: 10-bushing; 11-inner annular surface; 111-circular arc segment; 112-connecting segment; 12-fixing groove; 13-abutting column; 131-communicating groove; 132-first oil storage groove; 14-second oil storage groove; 20-pin; 21-adhesion part. DETAILED DESCRIPTION

[0024] The present disclosure will now be discussed with reference to a number of exemplary embodiments. It is to be appreciated that these embodiments are discussed solely for the purpose of enabling a better understanding of and, therefore, a better implementation of the present disclosure, and are not intended to suggest any limitation as to the scope of the present disclosure.

[0025] As used herein, the terms "comprises," "comprising," "includes," "including," "has," "having," "contains," "containing," or variations thereof, are to be construed as open-ended terms that do not exclude other components, elements, or steps. The terms "based on" and "based upon" are to be construed as "based at least in part on." The terms "one embodiment" and "an embodiment" are to be construed as "at least one embodiment." The term "another embodiment" is to be construed as "at least one other embodiment." The terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "vertical," "horizontal," "lateral," "longitudinal," and similar terms are used for clarity in describing the figures and are not to be construed as limiting the present disclosure to only the positions as shown. These terms primarily serve to more particularly describe the orientations and positional relationships between various elements as shown in the figures. The terms "mounted," "disposed," "provided," "connected," "coupled," and similar terms are to be construed as broadly as possible. For example, "connected" can mean fixedly connected, releasably connected, or integrally formed; "coupled" can mean mechanically or electrically connected, or connected via an intermediate medium; and "disposed" can mean directly or indirectly connected, or internal communication between two elements. The terms "first," "second," and the like do not necessarily denote any order, quantity, or importance, but are used to distinguish one element from another. Unless otherwise indicated, "plurality" means two or more.

[0026] A first aspect of the present embodiments discloses a vehicle controller bushing assembly, such as Figures 1 to 3As shown, it may include: a bushing 10 and a pin 20; the bushing 10 is cylindrical, the pin 20 is sleeved inside the bushing 10 and can move along the extension direction of the bushing 10, the bushing 10 includes an inner ring surface 11, the inner ring surface 11 includes two oppositely arranged arc segments 111 and a connecting segment 112, the two arc segments 111 are spaced apart along the forward direction of the vehicle, the two connecting segments 112 are respectively arranged between the two arc segments 111, the interval between the two connecting segments 112 is equal to the diameter of the pin 20, a first gap is provided between the arc segments 111 and the outer surface of the pin 20, and the connecting segment 112 abuts against the outer peripheral surface of the pin 20.

[0027] It should be noted that the vehicle controller generates braking force by the pressure and friction of the brake pads against the brake disc. This is especially important for commercial vehicles, where the weight increases further when carrying a large load of cargo. The vehicle controller is used not only for stopping but also for decelerating, particularly on long downhill sections where it frequently generates braking force to control speed and prevent loss of control due to excessive speed. However, the friction during braking generates a significant amount of heat, causing the vehicle controller temperature to rise, potentially reaching several hundred degrees Celsius without cooling measures. This heat is also conducted to the bushing components of the vehicle controller, often resulting in unusual noises such as whistling or creaking.

[0028] Furthermore, bushing 10 is a ring-shaped cylindrical structure, while in traditional designs, pin 20 is typically shaped to perfectly match the inner ring surface 11 of bushing 10. To ensure smooth movement of the vehicle controller, bushing 10 and pin 20 are already in a relatively tight fit at room temperature. However, after a significant temperature rise, their expansion coefficients differ due to the different materials. For example, in practical applications, bushing 10 and pin 20 may be made of different materials, and bushing 10 and the clamping body used to fix bushing 10 may also be made of different materials. For instance, bushing 10 is commonly made of copper or copper alloy, while other components such as the clamping body may be made of cast iron or steel. These material differences result in different expansion coefficients. Additionally, the different structures of bushing 10 and pin 20 lead to different expansion patterns during thermal expansion. Since the bushing 10 is installed on the clamp body by an interference fit, it is difficult for it to expand outward when it expands. Therefore, when the bushing 10 expands, the inner ring surface 11 may shrink. At the same time, the outer circumference of the pin 20 will expand outward, which will compress the fit clearance between the bushing 10 and the pin 20. This will cause excessive compression and wear between the bushing 10 and the pin 20, and may cause the bushing 10 to tilt relative to the pin 20 under the compression force, which will further cause it to jam and wear when it moves relative to the pin 20.

[0029] In the above-described technical solution, this application utilizes an inner annular surface 11 that mates with the bushing 10 and the pin 20, comprising two opposing arc segments 111 and a connecting segment 112. This inner annular surface 11 forms a structure similar to an elliptical cylinder or a waist-shaped hole, with its longer axis extending along the vehicle's travel direction and its vertically oriented sides having a shorter distance. This creates a first gap between the pin 20 and the inner annular surface 11 of the bushing 10 along the vehicle's travel direction. This first gap, specially designed compared to the conventional inner hole of the bushing 10, allows the pin 20 to undergo slight relative angular oscillations along the long axis of the inner annular surface 11 within the bushing 10 after thermal expansion. This better accommodates dimensional changes caused by thermal expansion, preventing brake lock-up due to excessively small gaps at high temperatures, ensuring the bushing 10's direction of travel remains unchanged, and thus preventing unnatural movement of the bushing 10. The deformation or hard contact friction effectively absorbs the unavoidable deformation and angular deviation generated by the vehicle controller during operation, while also avoiding frictional vibration and noise caused by forced constraints. At the same time, the two oppositely arranged connecting sections 112 of the inner ring surface 11 can cooperate with the outer peripheral surface of the bushing 10 and maintain the guiding function of the movement of the pin 20. This allows the above-mentioned technical solution of this application to effectively prevent abnormal noise and wear caused by high temperature while ensuring that the bushing 10 guides and limits the movement of the pin 20. The two arc segments 111 are spaced apart along the forward direction of the vehicle to avoid relative displacement of the pin 20 and the bushing 10 due to vertical vibration during vehicle movement. Therefore, the interval is only set along the forward direction of the vehicle, which ensures the stability of the guide and prevents thermal expansion from causing compression.

[0030] Furthermore, since the sliding between the pin 20 and bushing 10 of the vehicle controller is relative sliding, the grease between the bushing 10 and pin 20 of a conventional brake will gradually be lost or fail due to high temperature, water flow, dust contamination, and long-term use. Once lubrication is insufficient, the dry friction or boundary friction between the bushing 10 and pin 20 will increase sharply, which not only accelerates the wear of the bushing 10, but also makes it easier to induce stick-slip motion, which is also a common cause of low-frequency noises such as creaking. However, the setting of the first gap in this application allows the gap to store more grease, resulting in better lubrication.

[0031] As a specific implementation method, such as Figure 2 as well as Figure 4 As shown, the central angle of the arc segment 111 is 160°~180°, and the outer peripheral surface of the pin 20 is provided with a fitting part 21. The fitting part 21 is provided corresponding to the connecting segment 112, and the fitting part 21 can fit into the connecting segment 112.

[0032] Preferably, the central angle of the arc segment 111 is set to 180 degrees, that is, the arc segment 111 is a semicircle. In this case, the inner ring surface 11 of the bushing 10 formed is actually, compared with the traditional solution, the originally circular inner ring surface 11 is broken in the middle and stretched to both sides. The lengthened distance is the connecting segment 112 used for connection in the middle, and the two ends of the inner ring surface 11 form a first gap with the outer peripheral surface of the pin 20. That is, the maximum value of the first gap is half the length of the connecting segment 112. The maximum value of the first gap is set to 0.6mm to 0.9mm, preferably 0.75mm. If the cross-section of the pin 20 is only a perfect circle, its contact position with the bushing 10 will be a linear contact with a small contact area. Compared with the traditional solution where the entire contact surface is under force, the linear contact position of the pin 20 in this application has greater wear. After long-term use, it may lose its guiding function due to excessive wear, resulting in a shorter part life. Therefore, by setting the fitting part 21, the linear contact is improved to a surface contact, which increases the contact area between the pin 20 and the bushing 10, reduces the pressure at the contact position, slows down wear, and is more stable when facing vehicle vibration, making it less prone to relative movement, thereby further reducing wear and effectively extending the service life of the parts.

[0033] In some embodiments, such as Figure 2 , Figure 5 as well as Figure 6 As shown, the inner annular surface 11 has fixing grooves 12 at both ends along the vehicle's forward direction. The bushing 10 also includes an abutment post 13 disposed within the fixing groove 12. Part of the abutment post 13 protrudes from the fixing groove 12, and there is a second gap between the abutment post 13 and the outer peripheral surface of the pin 20. Due to structural characteristics, the first gap gradually increases from both ends to the middle. An excessively large gap may cause the pin 20 to become unstable when sliding relative to the bushing 10. Therefore, by using the abutment post 13, the first gap structure can be maintained as much as possible while limiting the excessive expansion and deformation of the pin 20 at this point, that is, limiting the expansion of the pin 20 to no more than the distance of the second gap. The abutment post 13 can also limit the excessive offset of the pin 20. The abutment post 13 can be installed into the fixing groove 12 by interference fit. In addition, during installation, the abutment post 13 or the fixing groove 12 can be observed to confirm whether they are indeed perpendicular to the working surface of the brake disc, serving as an installation reference.

[0034] Specifically, such as Figure 5 , Figure 6As shown, to ensure the abutment post 13 provides effective limiting, the bottom surface of the fixing groove 12 is arc-shaped. A fixing surface is provided on the side of the abutment post 13 facing the fixing groove 12, matching the shape of the fixing groove 12. The side of the abutment post 13 facing the bushing 10 includes a limiting surface. The outer circumferential surface of the pin 20 is cylindrical, while the limiting surface is planar. The limiting surface abuts against the outer circumferential surface of the pin 20 to restrict the rotation of the abutment post 13. The limiting surface contacts the pin 20 when it expands. At room temperature and in the assembled state, there is a gap between the limiting surface and the pin 20. The limiting surface increases the contact area between the abutment post 13 and the pin 20, resulting in more even force distribution. Furthermore, since the contact surface between the fixing groove 12 and the abutment post 13 is arc-shaped, the abutment post 13 may rotate relative to the fixing groove 12. The limiting surface prevents this rotation, thus providing a limiting effect.

[0035] Specifically, the depth of the fixing groove 12 is 40% to 60% of the wall thickness of the bushing 10 at that location. This ensures that the groove depth is sufficient while also preventing the bushing 10 wall thickness from being too thin and affecting its function.

[0036] Due to the arrangement of the abutment post 13, the first gap is divided into two parts. Although a gap still exists between the abutment post 13 and the pin 20 under normal conditions, the reduced gap makes it difficult for the grease on both sides of the abutment post 13 to replenish each other. Over time, this may lead to insufficient lubrication. Therefore, if... Figure 6 As shown, a connecting groove 131 is provided in the middle of the fixed surface. The connecting groove 131 surrounds the fixed surface, and its two ends extend to the limiting surface. The connecting groove 131 allows the grease on both sides of the abutment post 13 to replenish each other. Multiple connecting grooves 131 can be provided at intervals.

[0037] At the same time, to ensure the lubrication effect between the abutment post 13 and the pin 20, further, such as Figure 5 , Figure 6 As shown, a first oil reservoir 132 is provided on the limiting surface, and the first oil reservoir 132 extends along the axial direction of the abutment post 13. The provision of the first oil reservoir 132 allows more grease to be stored at the limiting surface, thereby ensuring the lubrication effect.

[0038] Furthermore, such as Figure 5 As shown, multiple second oil storage tanks 14 are evenly distributed on the inner peripheral wall of the bushing 10.

[0039] Specifically, such as Figure 5As shown, the second oil reservoir 14 extends along the extension direction of the bushing 10; the second oil reservoir 14 is configured to curve in the circumferential direction of the bushing 10. That is, the second oil reservoir 14 is configured as a curved oil reservoir, and these curved oil reservoirs, compared with straight grooves or dot-shaped pits, can more effectively form a continuous oil storage path on the inner wall of the bushing 10, ensuring that the grease is distributed more evenly and covers a larger area, and can be effectively distributed in both the circular and axial directions. At the same time, the curved design can better conform to the sliding trajectory of the moving parts, and can better guide the grease to flow and spread to the entire contact surface during movement. The curved transition is also generally less stress-concentrated than sharp right-angled grooves, and has less impact on the structural strength of the bushing 10.

[0040] During assembly or maintenance, both the first oil reservoir 132 and the second oil reservoir 14 are filled with high-performance, high-temperature brake grease. Even if the grease on the main sliding surface of the bushing 10's inner bore is scraped away or consumed during sliding, the grease stored in the groove can continuously seep out and replenish the sliding contact surface under the pressure of the bushing 10's thermal expansion and the movement of the pin 20. This continuous grease supply helps to form and maintain a thicker and more durable lubricating film between the pin 20 and the bushing 10, effectively separating the metal surfaces. Good lubrication can significantly reduce the coefficient of friction, especially reducing the occurrence of boundary friction, fundamentally suppressing the stick-slip vibration and abnormal noise caused by poor lubrication of the vehicle controller. At the same time, the tiny wear particles generated by the sliding of the bushing 10 and the pin 20 can also be stored in the groove, thereby reducing the risk of them acting as abrasives or causing jamming on the sliding surface. The arrangement of the first oil reservoir 132 and the second oil reservoir 14 ensures that the lubrication effect on the abutment column 13 is consistent with the lubrication effect on the inner wall of the bushing 10, making the lubrication of the entire pin 20 moving structure more uniform.

[0041] A second aspect of the present invention also provides a vehicle controller, which includes a clamp body and a vehicle controller bushing assembly as described above. The clamp body is provided with a mounting hole, and the bushing 10 is disposed in the mounting hole.

[0042] Those skilled in the art will understand that the above embodiments are specific examples of implementing this disclosure, and in practical applications, various changes can be made in form and detail without departing from the scope of this disclosure.

Claims

1. A vehicle controller bushing assembly, characterized by, The vehicle controller bushing assembly comprises: a bushing and a pin; the bushing is cylindrical, the pin is sleeved in the bushing and can move along the extension direction of the bushing, the bushing comprises an inner annular surface, the inner annular surface comprises two oppositely arranged circular arc segments and two connecting segments, the two circular arc segments are arranged at intervals along the advancing direction of the vehicle, the two connecting segments are arranged between the two circular arc segments respectively, the interval distance between the two connecting segments is equal to the diameter of the pin, a first gap is arranged between the circular arc segment and the outer side surface of the pin, and the connecting segment abuts against the outer peripheral surface of the pin. fixed grooves are arranged at the two ends of the inner annular surface along the advancing direction of the vehicle, and the bushing further comprises an abutting column arranged in the fixed groove, part of the abutting column protrudes out of the fixed groove, and a second gap is arranged between the abutting column and the outer peripheral surface of the pin.

2. The vehicle controller bushing assembly according to claim 1, wherein the central angle of the circular arc segment is 160°-180°, the outer peripheral surface of the pin is provided with a fitting part, the fitting part is arranged correspondingly to the connecting segment, and the fitting part can be fitted to the connecting segment.

3. The vehicle controller bushing assembly according to claim 1, wherein the bottom surface of the fixed groove is arc-shaped, the abutting column is provided with a fixing surface on the side facing the fixed groove, the fixing surface is matched with the shape of the fixed groove, the abutting column comprises a limiting surface on the side facing the bushing, the outer peripheral surface of the pin is a cylindrical surface, the limiting surface is a plane, and the limiting surface can abut against the outer peripheral surface of the pin to limit the rotation of the abutting column.

4. The vehicle controller bushing assembly according to claim 1, wherein the depth of the fixed groove is 40%-60% of the wall thickness of the bushing at the position of the fixed groove.

5. The vehicle controller bushing assembly according to claim 3, wherein a communication groove is arranged in the middle part of the fixing surface, the communication groove is arranged around the fixing surface, and the two ends of the communication groove respectively extend to the limiting surface.

6. The vehicle controller bushing assembly according to claim 3, wherein a first oil storage groove is arranged on the limiting surface and extends along the axial direction of the abutting column.

7. The vehicle controller bushing assembly according to claim 1, wherein a plurality of second oil storage grooves are uniformly arranged on the inner wall of the bushing.

8. The vehicle controller bushing assembly according to claim 7, wherein the second oil storage grooves extend along the extension direction of the bushing; the second oil storage grooves are arranged to be curved in the circumferential direction of the bushing.

9. A vehicle controller, comprising a clamp body and the vehicle controller bushing assembly according to any one of claims 1-8, wherein the clamp body is provided with a mounting hole, and the bushing is arranged in the mounting hole. ​

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