Vehicle controller bushing assembly and vehicle controller

Abstract

The invention relates to the technical field of vehicle control, in particular to a vehicle controller bush assembly and a vehicle controller, and the vehicle controller bush assembly comprises a bush and a pin; the lining is cylindrical, the pin is sleeved with the lining and can move in the extending direction of the lining, the lining comprises an inner ring face, the inner ring face comprises two arc sections and two connecting sections, the two arc sections are oppositely arranged, the two arc sections are arranged at intervals in the advancing direction of a vehicle, and the two connecting sections are arranged between the two arc sections respectively. The spacing distance between the two connecting sections is equal to the diameter of the pin, a first gap is formed between the arc section and the outer side face of the pin, and the connecting sections abut against the outer circumferential face of the pin. In this way, the problems that a traditional brake lining assembly generates noise in the using process and is poor in operation condition are solved.

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 scenes 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: 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. A large amount of heat is generated during the use of the vehicle controller 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 mode and the expansion coefficient of the two are different. Therefore, when the temperature is high, the two will be extruded, 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 causing unnatural deformation of the bushing or causing hard contact friction, thereby effectively absorbing the inevitable deformation and angle deviation of the vehicle controller during operation, while avoiding friction vibration and noise caused by forced constraint. At the same time, 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

[0016] Figure 1 A vehicle controller bushing assembly structure schematic diagram of an embodiment is shown. Figure 2 A top view structure schematic diagram of a bushing of an embodiment is shown. Figure 3 A vehicle controller bushing assembly cross-sectional structure schematic diagram of an embodiment is shown. Figure 4 A structure schematic diagram of a pin of an embodiment is shown. Figure 5 A structure schematic diagram of a bushing of an embodiment is shown. Figure 6 A structure schematic diagram of an abutting column of an embodiment is shown.

[0017] 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

[0018] 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, the best mode for implementing the present disclosure, and are not intended to suggest any limitation as to the scope of the present disclosure.

[0019] 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 the like, shall mean the orientation or position as shown in the drawings. These terms are merely used to better describe the application and its embodiments, and are not intended to limit the orientation or position of the devices, elements, or components as described and claimed. Also, the terms "front," "rear," "top," "bottom," "over," "under," and the like, can be used in the present application to describe elements as they are depicted in the figures, but the application is not limited to the orientation or position of the elements as depicted in the figures. The terms "front," "rear," "top," "bottom," "over," "under," and the like, can be used in the present application to describe elements as they are depicted in the figures, but the application is not limited to the orientation or position of the elements as depicted in the figures. The terms "mounted," "disposed," "provided," "connected," "coupled," "linked," and the like, should be construed broadly, and can be understood to be direct connections, removable connections, or integral connections, as well as mechanical, electrical, or magnetic connections, or combinations thereof. The terms "mounted," "disposed," "provided," "connected," "coupled," "linked," and the like, should be construed broadly, and can be understood to be direct connections, removable connections, or integral connections, as well as mechanical, electrical, or magnetic connections, or combinations thereof. The terms "first," "second," and the like, are used merely to identify different elements, and are not intended to be construed as indicating relative importance of or quantity of the indicated elements. The term "a plurality" means two or more, unless otherwise specified.

[0020] A first aspect of the present embodiments discloses a vehicle controller bushing assembly, such as Figures 1 to 3As shown, the assembly can include: a bushing 10 and a pin 20; the bushing 10 is cylindrical, the pin 20 is sleeved in the bushing 10 and can move along the extension direction of the bushing 10, the bushing 10 includes an inner annular surface 11, the inner annular surface 11 includes two oppositely arranged circular arc segments 111 and connecting segments 112, the two circular arc segments 111 are arranged at intervals along the advancing direction of the vehicle, and the two connecting segments 112 are arranged between the two circular arc segments 111 respectively, the interval distance between the two connecting segments 112 is equal to the diameter of the pin 20, the first gap is arranged between the circular arc segment 111 and the outer side surface of the pin 20, and the connecting segment 112 abuts against the outer peripheral surface of the pin 20.

[0021] It should be noted that the vehicle controller of the vehicle needs to generate braking force by pressing the brake pad to rub against the brake disc, especially for commercial vehicles, because the vehicle weight is large, after carrying a large amount of goods, the overall vehicle weight will further increase, and the use of the vehicle controller is not only for parking, but also for vehicle deceleration, especially on long downhill sections, the vehicle will frequently generate braking force through the vehicle controller to control the vehicle speed, so as to avoid out of control due to too high vehicle speed. However, during braking, a large amount of heat will be generated due to friction, causing the temperature of the vehicle controller to rise, and without cooling measures, it may even rise to hundreds of degrees. These heat will also be conducted to the bushing 10 assembly of the vehicle controller, at this time, the vehicle controller often emits abnormal noises such as screeching and squeaking.

[0022] Moreover, the bushing 10 is a ring-shaped cylindrical structure, and in the traditional scheme, the pin 20 is usually completely matched with the shape of the inner annular surface 11 of the bushing 10. In order to ensure smooth movement of the vehicle controller, the bushing 10 and the pin 20 are already in a relatively tight fitting state at room temperature, but after the temperature rises significantly, due to the different expansion coefficients of different materials, for example, in actual use, the bushing 10 and the pin 20 may be made of different materials, and the body of the caliper for fixing the bushing 10 may also be made of different materials, for example, the bushing 10 is often made of copper or copper alloy as the material, while other parts such as the body of the caliper can be made of cast iron or steel materials. The difference between these materials makes them have different expansion coefficients. In addition, the bushing 10 and the pin 20 have different structures, so that they will have different expansion ways when they expand. Among them, the bushing 10 is installed on the body of the caliper through interference fit embedding, which makes it difficult to expand outward when it expands, therefore, the bushing 10 may shrink the inner annular surface 11 when it expands, at the same time, the pin 20 will expand outward, causing the fitting gap between the bushing 10 and the pin 20 to be compressed, at this time, it will cause excessive extrusion and wear between the bushing 10 and the pin 20, and the bushing 10 may tilt relative to the pin 20 under the extrusion force, further causing it to be stuck and additional wear when it moves relative to the pin 20.

[0023] In the above technical solution, the inner annular surface 11 matched with the pin 20 is provided with two oppositely arranged circular arc segments 111 and a connecting segment 112, so that the inner annular surface 11 forms an elliptical cylindrical surface or a waist-shaped hole structure, and the longer axis of the inner annular surface 11 extends in the direction of vehicle travel, and the distance between the two sides in the vertical direction is relatively small, so that the first gap is formed between the two sides of the pin 20 in the direction of vehicle travel and the inner annular surface 11 of the bushing 10. The first gap specially provided in the inner hole of the traditional bushing 10 allows the pin 20 to slightly swing in the direction of the long axis of the inner annular surface 11 after thermal expansion, so that the size change caused by thermal expansion can be better accommodated, the brake lock phenomenon caused by the too small gap in the high temperature environment is prevented, the running direction of the bushing 10 is ensured to be unchanged, so that the bushing 10 will not be deformed abnormally or produce hard contact friction, thereby effectively absorbing the inevitable deformation and angular deviation of the vehicle controller during operation, and avoiding friction vibration and noise caused by forced constraint. Meanwhile, the two oppositely arranged connecting segments 112 of the inner annular surface 11 can be matched with the outer circumferential surface of the bushing 10 and can guide the movement of the pin 20, so that the above technical solution can guide and limit the movement of the pin 20 while preventing abnormal noise and wear caused by thermal expansion.

[0024] In addition, since the sliding between the pin 20 of the vehicle controller and the bushing 10 is relative sliding, the lubricating grease between the bushing 10 and the pin 20 of the traditional brake will gradually be lost or fail due to high temperature, water flow, dust pollution and long-term use. Once the lubrication is insufficient, the dry friction or boundary friction between the bushing 10 and the pin 20 will increase sharply, not only accelerating the wear of the bushing 10, but also more easily inducing stick-slip motion, which is also a common cause of low-frequency noise such as creaking sound. However, the first gap in the present application can additionally store more lubricating grease, so that the lubrication effect is better.

[0025] As a specific embodiment, as shown in Figure 2 and Figure 4 The central angle of the circular arc segment 111 is 160°-180°, the outer circumferential surface of the pin 20 is provided with a fitting part 21, the fitting part 21 is correspondingly arranged with the connecting segment 112, and the fitting part 21 can be fitted with the connecting segment 112.

[0026] Preferably, the central angle of the circular arc segment 111 is set to 180 degrees, that is, the circular arc segment 111 is semicircular, and at this time, the inner annular surface 11 of the bushing 10 formed is actually compared with the traditional scheme, the originally circular inner annular surface 11 is disconnected in the middle and elongated to both sides, and the elongated distance is the length of the connecting segment 112 used for connection in the middle, and the two ends of the inner annular surface 11 form the first gap between 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, and the maximum value of the first gap is set to 0.6mm-0.9mm, preferably 0.75mm. If the cross section of the pin 20 is only a circle, the contact position with the bushing 10 will be linear contact, the contact area is small, compared with the traditional scheme that the entire contact surface is under stress, the linear contact position of the pin 20 in this application is greatly worn, and after long-term use, it may lose the guiding effect due to excessive wear, and the service life of the part is short. Therefore, by setting the fitting part 21, the linear contact is improved to surface contact, the contact area of the pin 20 and the bushing 10 is increased, the contact position pressure is reduced, the wear is slowed down, and when the vehicle is vibrating, it is more stable and less likely to move relatively, thereby further reducing wear and effectively prolonging the service life of the part.

[0027] In some embodiments, as shown in Figure 2 、 Figure 5 and Figure 6 , the inner annular surface 11 is provided with a fixed groove 12 at both ends in the vehicle forward direction, and the bushing 10 further comprises an abutting column 13 arranged in the fixed groove 12, part of the abutting column 13 protrudes from the fixed groove 12, and the abutting column 13 has a second gap with the outer peripheral surface of the pin 20. Due to the structural characteristics, the structure of the first gap gradually increases from both ends to the middle, and excessive gap may cause instability when the pin 20 slides relative to the bushing 10, therefore, by using the arranged abutting column 13, the first gap structure can be ensured as much as possible while limiting the excessive expansion deformation of the pin 20 at this position, that is, limiting the expansion of the pin 20 to not more than the distance of the second gap, and the arrangement of the abutting column 13 can also limit the excessive deviation of the pin 20. The abutting column 13 can be installed in the fixed groove 12 by interference fit. In addition, during installation, the abutting column 13 or the fixed groove 12 can be observed to confirm whether it is indeed perpendicular to the working surface of the brake disc as the installation reference.

[0028] Specifically, as shown in Figure 5 、 Figure 6As shown, in order to enable the abutting column 13 to play a better limiting role, the bottom surface of the fixing groove 12 is arc-shaped, the side of the abutting column 13 facing the fixing groove 12 is provided with a fixing surface, the fixing surface is matched with the shape of the fixing groove 12, the side of the abutting column 13 facing the bushing 10 comprises a limiting surface, the outer peripheral surface of the column pin 20 is a cylindrical surface, the limiting surface is a plane, and the limiting surface can abut against the outer peripheral surface of the column pin 20 to limit the rotation of the abutting column 13. The limiting surface can be in contact with the column pin 20 when the column pin 20 expands, and there is a gap between the limiting surface and the column pin 20 at normal temperature and in the assembled state. On the one hand, the setting of the limiting surface can increase the contact area between the abutting column 13 and the column pin 20, so that the stress is uniform. On the other hand, since the contact surface between the fixing groove 12 and the abutting column 13 is arc-shaped, the abutting column 13 can rotate relative to the fixing groove 12, and the setting of the limiting surface can prevent the abutting column 13 from rotating to play a limiting role.

[0029] Specifically, the depth of the fixing groove 12 is 40% to 60% of the wall thickness of the bushing 10 at the position of the fixing groove 12. This not only ensures that the depth of the groove is sufficient, but also ensures that the wall thickness of the bushing 10 is not too thin to affect the function of the bushing 10.

[0030] Due to the setting of the abutting column 13, the first gap is divided into two parts by the abutting column 13. Although there is still a gap between the abutting column 13 and the column pin 20 in the normal state, the reduced gap makes it difficult for the lubricating grease on both sides of the abutting column 13 to supplement each other, which may lead to insufficient lubrication in part over time. Therefore, as shown, Figure 6 As shown, the middle part of the fixing surface is provided with a communication groove 131, the communication groove 131 is arranged around the fixing surface, and the two ends of the communication groove 131 extend to the limiting surface respectively. Through the setting of the communication groove 131, the lubricating grease on both sides of the abutting column 13 can supplement each other, wherein the communication groove 131 can be spaced apart.

[0031] At the same time, in order to ensure the lubricating effect between the abutting column 13 and the column pin 20, further, Figure 5 , Figure 6 As shown, a first oil storage groove 132 is arranged on the limiting surface and extends in the axial direction of the abutting column 13. The setting of the first oil storage groove 132 enables the limiting surface to store more lubricating grease, thereby ensuring the lubricating effect.

[0032] Further, as shown, Figure 5 The inner peripheral wall of the bushing 10 is uniformly provided with a plurality of second oil storage grooves 14.

[0033] Specifically, as shown, Figure 5As shown, the second oil reservoir 14 is arranged along the extension direction of the bushing 10; the second oil reservoir 14 is arranged to bend in the circumferential direction of the bushing 10. That is, the second oil reservoir 14 is arranged as a curved oil reservoir, and compared with straight grooves or point-shaped recesses, the curved oil reservoirs can more effectively form a continuous oil storage path on the inner wall of the bushing 10, ensure more uniform distribution of the lubricating grease, and have a larger coverage area, and can effectively distribute in the radial direction and the axial direction, and the curved design can be more consistent with the sliding track of the moving part, and can better guide the lubricating grease to flow and be applied to the entire contact surface during movement, and the curved transition is generally less stress concentrated than sharp right-angled grooves, and has less impact on the structural strength of the bushing 10.

[0034] During assembly or maintenance, the first oil reservoir 132 and the second oil reservoir 14 are filled with high-performance high-temperature-resistant brake lubricating grease, and even if the lubricating grease on the main sliding surface of the inner hole of the bushing 10 is scraped off or consumed during sliding, the lubricating grease stored in the groove can continuously seep out under the extrusion of the thermal expansion of the bushing 10 and the movement of the pin 20, and be continuously applied to the sliding contact surface. This continuous supply of lubricating grease helps to form and maintain a thicker and more durable lubricating oil film between the pin 20 and the bushing 10, which can effectively separate the metal surfaces, and good lubrication can significantly reduce the friction coefficient, especially reduce the occurrence of boundary friction state, fundamentally inhibit the stick-slip vibration of the vehicle controller caused by poor lubrication and the abnormal noise generated thereby, and the small 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 acting as an abrasive or causing jamming on the sliding surface. The arrangement of the first oil reservoir 132 and the second oil reservoir 14 makes the lubricating effect on the abutting pin 13 consistent with the lubricating effect on the inner wall of the bushing 10, and makes the lubrication of the entire pin 20 movement structure more uniform.

[0035] The second aspect of the present application also provides a vehicle controller, which comprises a caliper body and the vehicle controller bushing assembly in the above technical solution, and the bushing 10 is arranged in the mounting hole of the caliper body.

[0036] Those skilled in the art can understand that the above embodiments are specific cases for implementing the present disclosure, and in actual applications, various changes can be made in form and details without departing from the scope of the present disclosure.

Claims

1. A vehicle controller bushing assembly, characterized in that, The vehicle controller bushing assembly includes: Bushings and pins; The bushing is cylindrical, and the pin is fitted inside the bushing and can move along the extension direction of the bushing. The bushing includes an inner annular surface, which includes two oppositely arranged arc segments and a connecting segment. The two arc segments are spaced apart along the forward direction of the vehicle. The two connecting segments are respectively arranged 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. The connecting segment abuts against the outer circumferential surface of the pin.

2. The vehicle controller bushing assembly according to claim 1, characterized in that, The central angle of the arc segment is 160°~180°, and the outer circumferential surface of the pin is provided with a fitting part, which is correspondingly provided with the connecting segment and can fit into the connecting segment.

3. A vehicle controller bushing assembly according to claim 1, characterized in that, The inner annular surface is provided with fixing grooves at both ends along the vehicle's forward direction. The bushing also includes an abutment post disposed in the fixing groove. A portion of the abutment post protrudes from the fixing groove, and a second gap exists between the abutment post and the outer peripheral surface of the pin.

4. A vehicle controller bushing assembly according to claim 3, characterized in that, The bottom surface of the fixing groove is arc-shaped. The side of the abutment post facing the fixing groove is provided with a fixing surface, which matches the shape of the fixing groove. The side of the abutment post facing the bushing includes a limiting surface. The outer peripheral surface of the pin is cylindrical, and the limiting surface is planar. The limiting surface can abut against the outer peripheral surface of the pin to restrict the rotation of the abutment post.

5. A vehicle controller bushing assembly according to claim 3, characterized in that, The depth of the fixing groove is 40% to 60% of the wall thickness of the bushing at its location.

6. A vehicle controller bushing assembly according to claim 4, characterized in that, A connecting groove is provided in the middle of the fixed surface, the connecting groove is arranged around the fixed surface, and the two ends of the connecting groove extend to the limiting surface respectively.

7. A vehicle controller bushing assembly according to claim 4, characterized in that, A first oil reservoir is provided on the limiting surface, and the first oil reservoir extends along the axial direction of the abutment column.

8. A vehicle controller bushing assembly according to claim 1, characterized in that, The inner wall of the bushing is provided with multiple second oil storage tanks evenly distributed.

9. A vehicle controller bushing assembly according to claim 8, characterized in that, The second oil reservoir extends along the extension direction of the bushing; The second oil reservoir is configured to be curved in the circumferential direction of the bushing.

10. A vehicle controller, characterized in that, The vehicle controller includes a clamp body and a vehicle controller bushing assembly as described in any one of claims 1-9, wherein the clamp body is provided with a mounting hole and the bushing is disposed within the mounting hole.

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