CN114321218B - Disc brake and vehicle with same - Google Patents
Disc brake and vehicle with same Download PDFInfo
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- CN114321218B CN114321218B CN202011051773.4A CN202011051773A CN114321218B CN 114321218 B CN114321218 B CN 114321218B CN 202011051773 A CN202011051773 A CN 202011051773A CN 114321218 B CN114321218 B CN 114321218B
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- hole
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- disc brake
- threaded fastener
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Abstract
The application discloses a disc brake and a vehicle with the same, wherein the disc brake comprises: the brake caliper support is provided with at least one bulge, and a bulge matching hole is formed in the bulge; the brake caliper is arranged on the brake caliper support, and at least one guide hole is formed in the brake caliper; the brake caliper comprises at least one supporting device, the supporting device comprises a guide pin and a threaded fastener, a first matching hole and a second matching hole which are communicated with each other along the axial direction are formed on the guide pin, the second matching hole is connected to one side of the first matching hole, which is far away from a brake caliper support, a protrusion is matched in the first matching hole, the threaded fastener penetrates one of the second matching hole and the protrusion matching hole and is in threaded connection with the other of the second matching hole and the protrusion matching hole, the guide pin is matched in the guide hole, and the brake caliper is movable along the axial direction of the guide pin. According to the disc brake provided by the application, the stress on the threaded fastener can be reduced, and the service life of the threaded fastener can be prolonged.
Description
Technical Field
The application relates to the technical field of brakes, in particular to a disc brake and a vehicle with the disc brake.
Background
In the related art, when a vehicle runs on a road with poor road surface state for a long time, impact load from the road surface is large and continuously changes, so that a brake caliper of a brake continuously generates intense and changing vibration, and the continuously intense vibration of the brake caliper can cause a guide bolt to break due to the fact that the guide bolt is subjected to large alternating bending moment and shearing force or to break due to fatigue, and therefore driving safety is affected.
Disclosure of Invention
The present application aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present application is to provide a disc brake which can reduce stress applied to a threaded fastener, prevent the threaded fastener from being broken due to excessive stress or broken due to fatigue, prolong the service life of the threaded fastener, and improve the safety of a vehicle.
Another object of the application is to propose a vehicle with a disc brake as described above.
According to an embodiment of the present application, a disc brake includes: a brake disc; the brake caliper support is arranged above the brake disc, at least one protrusion is arranged on the brake caliper support, and a protrusion matching hole is formed in the protrusion; the brake caliper is arranged on the brake caliper support, and at least one guide hole is formed in the brake caliper; at least one support device, the support device includes the guide pin, be formed with along axial intercommunication's first mating hole and second mating hole on the guide pin, the second mating hole is connected in the first mating hole keep away from the brake caliper support's one side, protruding cooperation is in first mating hole, threaded fastener pass second mating hole with protruding mating hole one of them and with the second mating hole with protruding mating hole's another threaded connection, the guide pin is fit in the guide hole, and the brake caliper is relative the brake caliper support is along the axial of guide pin movable.
According to the disc brake provided by the embodiment of the application, the brake caliper support is provided with at least one protrusion, the protrusion is provided with the protrusion matching hole, the guide pin is provided with the first matching hole and the second matching hole which are mutually communicated along the axial direction, the protrusion is matched in the first matching hole, the threaded fastener passes through one of the second matching hole and the protrusion matching hole to be in threaded connection with the other of the second matching hole and the protrusion matching hole, so that the matching length of the threaded fastener and the brake caliper support can be effectively increased, the protrusion and the guide pin can share impact load, the stress borne by the threaded fastener can be reduced, the service life of the threaded fastener is prolonged, and the safety of a vehicle is improved. In addition, the threaded fastener can be firmly connected with the bulge and the guide pin, so that the structural stability and the installation rigidity of the disc brake can be improved, and vibration and noise are not easy to generate in the disc brake.
According to some embodiments of the application, the brake caliper is provided with a brake chamber.
According to some embodiments of the application, the threaded fastener includes a threaded section and a non-threaded section connected to each other in an axial direction of the guide pin, the other of the second mating hole and the boss mating hole is threadedly connected to the threaded section, and an end face of the boss remote from the caliper support bracket is opposite to the non-threaded section.
According to some embodiments of the application, a third mating hole communicating with the second mating hole is formed at an end of the guide pin away from the brake caliper support, the threaded fastener passes through the second mating hole and is in threaded connection with the protruding mating hole, and a head of the threaded fastener is located in the third mating hole, wherein a diameter of the head of the threaded fastener is larger than a diameter of the second mating hole.
According to some embodiments of the application, the junction of the protuberance with the calliper support is smooth.
According to some embodiments of the application, the guide pin comprises: the body is provided with the first matching hole and the second matching hole; the wear-resistant layer is arranged on the radial outer side of the body; and the elastic buffer layer is connected between the body and the wear-resistant layer.
According to some embodiments of the application, the two end surfaces of the wear-resistant layer are respectively flush with the two end surfaces of the body, and the elastic buffer layer covers the whole peripheral surface of the body.
According to some embodiments of the application, the wear-resistant layer is formed with an opening penetrating in a thickness direction of the wear-resistant layer, and the opening penetrates through both end surfaces of the wear-resistant layer.
According to some embodiments of the application, the opening is formed in a lower portion of the wear layer.
According to some embodiments of the application, the protrusion and the support means are two, the two support means are a first support means and a second support means, respectively, the guide pin of the first support means has a length greater than the guide pin of the second support means, and the guide pin of the first support means has a cross-sectional area greater than the guide pin of the second support means.
A vehicle according to an embodiment of the second aspect of the present application includes a disc brake according to an embodiment of the first aspect of the present application described above.
Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.
Drawings
The foregoing and/or additional aspects and advantages of the application will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is a partial perspective view of a disc brake according to an embodiment of the present application;
FIG. 2 is an exploded view of a disc brake according to an embodiment of the present application;
FIG. 3 is a top view of a disc brake according to an embodiment of the present application;
FIG. 4a is a partial cross-sectional view of a disc brake according to an embodiment of the present application;
FIG. 4b is an enlarged partial view of the disc brake shown in FIG. 4 a;
FIG. 5 is another partial cross-sectional view of a disc brake according to an embodiment of the present application;
FIG. 6 is an enlarged partial view of the disc brake shown in FIG. 5;
fig. 7 is a schematic structural view of a guide pin of a first supporting device of a disc brake according to an embodiment of the present application;
FIG. 8 is a cross-sectional view taken along line A-A of FIG. 7;
fig. 9 is a schematic structural view of a guide pin of a second supporting device of a disc brake according to an embodiment of the present application;
fig. 10 is a sectional view taken along line B-B of fig. 9.
Reference numerals:
100: a disc brake;
1: a brake disc; 2: a brake caliper support; 21: a protrusion; 211: a protrusion fitting hole;
3: a brake caliper; 31: a mounting hole; 4: a support device; 41: a guide pin;
411: a first mating hole; 412: a second mating hole; 413: a body;
414: a wear-resistant layer; 4141: an opening; 415: an elastic buffer layer;
416: a third mating hole; 42: a threaded fastener; 421: a threaded section;
422: a non-threaded section; 43: a first support means; 431: a first dust cap;
44: a second support means; 441: a second dust cap; 5: a brake chamber.
Detailed Description
Embodiments of the present application will be described in detail below, by way of example with reference to the accompanying drawings.
A disc brake 100 according to an embodiment of the first aspect of the present application is described below with reference to fig. 1 to 10. The disc brake 100 may be applied to a vehicle (not shown). In the following description of the present application, an example in which the disc brake 100 is applied to a vehicle is described.
As shown in fig. 1-3, a disc brake 100, such as a pneumatically floating disc brake, according to an embodiment of the first aspect of the application comprises a brake disc 1, a brake caliper support 2, a brake caliper 3 and at least one support means 4.
Specifically, the caliper support 2 is provided above the brake disc 1, at least one protrusion 21 is provided on the caliper support 2, a protrusion fitting hole 211 is formed on the protrusion 21, the caliper 3 is provided on the caliper support 2, at least one guide hole is formed on the caliper 3, the support device 4 includes a guide pin 41 and a threaded fastener 42, a first fitting hole 411 and a second fitting hole 412 which communicate with each other in the axial direction are formed on the guide pin 41, the second fitting hole 412 is connected to a side of the first fitting hole 411 which is away from the caliper support 2, the protrusion 21 is fitted in the first fitting hole 411, the threaded fastener 42 passes through one of the second fitting hole 412 and the protrusion fitting hole 211 and is screwed with the other of the second fitting hole 412 and the protrusion fitting hole 211, the guide pin 41 is fitted in the guide hole, and the caliper 3 is movable in the axial direction of the guide pin 41 with respect to the caliper support 2. That is, the threaded fastener 42 passes through the second fitting hole 412 and is screwed with the boss fitting hole 211, or the threaded fastener 42 passes through the boss fitting hole 211 and is screwed with the second fitting hole 412. Alternatively, the threaded fastener 42 may be a bolt and the caliper support 2 and the caliper 3 may be cast iron pieces. But is not limited thereto.
Thus, when the vehicle travels on a road with a poor road surface condition, an impact load from the road surface is transmitted to the caliper 3 and causes vibration of the caliper 3, the caliper 3 can transmit the vibration to the guide pin 41, since the projection 21 is fitted into the first fitting hole 411 on the guide pin 41, radial movement of the guide pin 41 with respect to the caliper support 2 can be restricted, the guide pin 41 can surround the projection 21, so that the guide pin 41 can bear a certain load together with the threaded fastener 42, and stress to the threaded fastener 42 can be greatly reduced (for example, stress to the threaded fastener 42 can be reduced by 60% or more under the same condition) as compared with the conventional disc brake. Moreover, the protrusion 21 can increase the matching length of the threaded fastener 42 and the brake caliper support 2, when the brake caliper 3 vibrates, the protrusion 21 can bear impact load together with the threaded fastener 42, and stress on the threaded fastener 42 can be reduced, so that the threaded fastener 42 can be prevented from being broken due to larger alternating bending moment and shearing force or broken due to fatigue, the service life of the threaded fastener 42 is prolonged, and the running safety of a vehicle is further ensured. In addition, by making the caliper 3 movable with respect to the caliper bracket 2, the caliper 3 can be moved toward the brake disc 1 with respect to the axial direction of the guide pin 41 during braking, so that the brake disc 1 is sandwiched by the caliper 3, and friction torque is generated by the brake disc 1 on the wheel axle of the vehicle, thereby realizing braking of the vehicle.
According to the disc brake 100 of the embodiment of the application, at least one protrusion 21 is arranged on the brake caliper support 2, the protrusion matching hole 211 is formed on the protrusion 21, the first matching hole 411 and the second matching hole 412 which are communicated with each other along the axial direction are formed on the guide pin 41, the protrusion 21 is matched in the first matching hole 411, the threaded fastener 42 passes through one of the second matching hole 412 and the protrusion matching hole 211 to be in threaded connection with the other of the second matching hole 412 and the protrusion matching hole 211, so that the matching length of the threaded fastener 42 and the brake caliper support 2 can be effectively increased, the protrusion 21 and the guide pin 41 can share impact load, the stress on the threaded fastener 42 can be reduced, the service life of the threaded fastener 42 can be prolonged, and the safety of a vehicle can be improved. Moreover, by this arrangement, the screw fastener 42 can be firmly connected to both the boss 21 and the guide pin 41, so that the structural stability and the mounting rigidity of the disc brake 100 can be improved, and vibration and noise are not easily generated in the disc brake 100.
In some embodiments, referring to fig. 2, the outer surface of the protrusion 21 may be a smooth cylindrical surface, and the shape of the first fitting hole 411 may be adapted to the shape of the protrusion 21. In this way, a close fitting of the projection 21 with the first fitting hole 411 can be achieved, effectively limiting the radial movement of the guide pin 41 with respect to the caliper support 2, improving the structural stability of the whole disc brake 100, such as a pneumatic floating disc brake. Moreover, by making the outer surface of the projection 21 smooth, friction between the outer surface of the projection 21 and the inner wall surface of the first fitting hole 411 can be reduced, easy installation and removal can be facilitated, and the installation and removal efficiency can be improved.
In some embodiments of the application, as shown in figures 2-4 a and 5, the brake caliper 3 is provided with a brake chamber 5. Thus, by providing the brake chamber 5 on the caliper 3, on the one hand, the integration level of the whole disc brake 100 can be improved, the structure of the disc brake 100 is more compact, and the spatial layout of the disc brake 100 on the vehicle is facilitated; on the other hand, due to the fact that the protrusions 21 are arranged on the brake caliper support 2, the service life of the threaded fastener 42 can be effectively prolonged, and the strength of the threaded fastener 42 can be fully utilized on the basis that the service life requirement of the threaded fastener 42 is met by the aid of the brake air chamber 5, namely excessive overflow of the strength of the threaded fastener 42 such as a bolt relative to the service requirement is avoided.
In some embodiments of the present application, referring to fig. 4 a-5, the threaded fastener 42 includes a threaded section 421 and a non-threaded section 422 connected to each other in the axial direction of the guide pin 41, the other of the second fitting hole 412 and the boss fitting hole 211 is threadedly coupled to the threaded section 421, and an end face of one end (e.g., right end in fig. 4 a-5) of the boss 21 remote from the caliper support 2 is opposite to the non-threaded section 422. Therefore, since the part of the threaded fastener 42 opposite to the end face of the protrusion 21 far from the caliper support 2 is subjected to the alternating shearing force, the non-threaded section 422 of the threaded fastener 42 is opposite to the end face, and the non-threaded section with higher structural strength can be subjected to the alternating shearing force instead of the threaded section with lower structural strength, so that the risk of cracking of the threaded fastener 42 is reduced, the service life of the threaded fastener 42 can be further prolonged, and the safety of a vehicle is ensured.
In some embodiments of the present application, referring to fig. 4 a-6 in combination with fig. 8 and 10, the end of the guide pin 41 remote from the caliper support 2 is formed with a third fitting hole 416 communicating with the second fitting hole 412, the threaded fastener 42 passes through the second fitting hole 412 and is screwed with the boss fitting hole 211, and the head of the threaded fastener 42 is located within the third fitting hole 416, wherein the diameter of the head of the threaded fastener 42 is larger than the diameter of the second fitting hole 412. Therefore, due to the arrangement of the protrusions 21, the protrusion matching holes 211 have a larger length, and the arrangement can increase the engagement length of the threaded fasteners 42, such as bolts, with the protrusion matching holes 211, so that the protrusions 21 can bear vibration load and impact load together with the threaded fasteners 42 better, the highest stress level of the threaded fasteners 42 is reduced, and the service life of the threaded fasteners 42 is prolonged effectively. Moreover, since the threaded fastener 42 is generally a standard component, the length of the protrusion 21 protruding outwardly relative to the caliper support 2 can be determined according to the length of the threaded section 421 of the threaded fastener 42, so that the end surface of the protrusion 21, which is far away from the caliper support 2, can be opposite to the non-threaded section 422 of the threaded fastener 42, thereby preventing the threaded fastener 42 from being broken and prolonging the service life. In addition, by providing the third mating hole 416 as described above, the head of the threaded fastener 42 may be received within the third mating hole 416, thereby reducing the footprint of the threaded fastener 42 and making the overall disc brake 100, such as a pneumatic floating disc brake, more compact. In addition, by making the diameter of the head of the threaded fastener 42 larger than the diameter of the second fitting hole 412, the head of the threaded fastener 42 can be always maintained in the third fitting hole 416, so that a firm connection of the guide pin 41 and the boss 21 can be achieved, ensuring structural stability of the entire disc brake 100.
Of course, the application is not so limited and in other embodiments of the application, the threaded fastener 42 may pass through the male mating bore 211 and be threadably coupled to the second mating bore 412. It will be appreciated that the manner in which the threaded fastener 42 is installed may be specifically determined based on the actual needs to better suit the application.
In some embodiments, with reference to fig. 2, 4 a-6, the end of the guide pin 41 of the first support means 43 remote from the calliper support 2 is provided with a first dust cap 431 and the end of the guide pin 41 of the second support means 44 remote from the calliper support 2 is provided with a second dust cap 441. In this way, the first dust cover 431 and the second dust cover 441 may effectively protect the corresponding guide pin 41, and prevent foreign matters such as dust from entering the guide pin 41.
In some embodiments of the application, in connection with fig. 4 a-6, the junction of the protuberance 21 with the calliper support 2 is smooth. So set up, the transition between protruding 21 and the brake caliper support 2 can be more gentle smooth, can improve the local stress of protruding 21 and the junction of brake caliper support 2, avoid protruding 21 and the junction of brake caliper support 2 to produce stress concentration to can improve the joint strength between protruding 21 and the brake caliper support 2.
In some embodiments of the present application, as shown in fig. 6 and 8, the guide pin 41 includes a body 413, a wear layer 414, and an elastic buffer layer 415. Specifically, the body 413 is formed with a first fitting hole 411 and a second fitting hole 412, the wear layer 414 is provided radially outside the body 413, and the elastic buffer layer 415 is connected between the body 413 and the wear layer 414. Thus, since the caliper 3 moves in the axial direction of the guide pin 41 with respect to the caliper support 2 during braking, the guide pin 41 can be made more resistant to mechanical wear by providing the wear-resistant layer 414 as described above, and the service life of the guide pin 41 can be effectively prolonged. Through setting up foretell elasticity buffer layer 415, elasticity buffer layer 415 can produce the deformation to effectively absorb vibration and impact, when reducing noise, can reduce the impact force that transmits to threaded fastener 42, and then can prevent threaded fastener 42 fracture, further extension threaded fastener 42's life. Wherein the elastomeric buffer layer 415 may be intimately bonded to the wear layer 414 by a vulcanization process. But is not limited thereto.
In a further embodiment of the present application, referring to fig. 7 and 8, both end surfaces of the wear-resistant layer 414 are respectively flush with both end surfaces of the body 413, and the elastic buffer layer 415 covers the entire outer circumferential surface of the body 413. By this arrangement, only the contact with the wear-resistant layer 414 is ensured when the caliper 3 moves in the axial direction of the guide pin 41, so that the movement of the caliper 3 is smoother, and the structural strength and structural stability of the guide pin 41 can be ensured. Moreover, the elastic buffer layer 415 provided in this way can absorb vibration and impact better, so as to avoid impact load from being directly transferred from the wear-resistant layer 414 to the body 413, and has stronger impact resistance, thereby further preventing the threaded fastener 42 from breaking and ensuring the safety of the vehicle.
In some embodiments of the present application, as shown in fig. 7 and 8, an opening 4141 penetrating in the thickness direction of the wear-resistant layer 414 is formed on the wear-resistant layer 414, and the opening 4141 penetrates both end surfaces of the wear-resistant layer 414. Therefore, when the vehicle passes through a bumpy road surface, the brake caliper 3 can transmit vibration and impact to the wear-resistant layer 414 of the guide pin 41, and the wear-resistant layer 414 can better transmit the vibration and impact to the elastic buffer layer 415 due to the opening 4141 formed in the wear-resistant layer 414, so that the stress on the threaded fastener 42 is reduced, and the opening 4141 is arranged so that the wear-resistant layer 414 can deform to a certain extent when the elastic buffer layer 415 deforms, and the structure is simple and the processing is convenient.
In some embodiments of the present application, referring to fig. 7, an opening 4141 is formed in a lower portion of the wear layer 414. Since the caliper 3 is movable in the axial direction of the guide pin 41 with respect to the caliper bracket 2, the guide pin 41 is in clearance fit with the guide hole. Under the action of gravity, the inner wall of the guide hole of the brake caliper 3 is normally in contact with the upper portion of the guide pin 41, and the inner wall of the guide hole of the brake caliper 3 has a certain clearance from the lower portion of the guide pin 41. Accordingly, by forming the opening 4141 at the lower portion of the wear-resistant layer 414, severe wear due to line contact between the brake caliper 3 and the end portion of the opening 4141 during axial movement of the guide pin 41 is avoided, so that wear of the opening 4141 can be effectively reduced, and the service life of the wear-resistant layer 414 can be prolonged. In some embodiments, the ends of the opening 4141 may be ground to provide a smooth configuration to at least the portion of the opening 4141 facing the brake caliper 31. In this way, the wear of the openings can be further reduced, further ensuring a higher service life of the wear layer 414.
In some alternative embodiments of the present application, the elastic cushion 415 may be a rubber layer. Therefore, since the rubber has good vibration damping, sound insulation and buffering performances, the elastic buffer layer 415 is made of a rubber layer, so that vibration and impact energy can be better absorbed, and the vibration damping and noise reduction effects on the brake caliper 3 can be realized. The thickness and rigidity of the rubber layer can be calculated from the deformation amount of the rubber layer caused by the impact load applied to the caliper 3.
In some alternative embodiments of the present application, the wear layer 414 is a metal layer having a smooth outer surface. By means of the arrangement, the outer surface of the wear-resistant layer 414 is high in smoothness, and when the brake caliper 3 moves relative to the brake caliper support 2 along the axial direction of the guide pin 41, friction force between the inner wall of the matching hole of the brake caliper 3 and the wear-resistant layer 414 can be reduced, so that braking distance can be shortened, and timely braking can be achieved.
In some embodiments of the present application, as shown in fig. 2, the protrusions 21 and the supporting means 4 are two, and the two supporting means 4 are a first supporting means 43 and a second supporting means 44, respectively, the length of the guide pin 41 of the first supporting means 43 is greater than the length of the guide pin 41 of the second supporting means 44, and the cross-sectional area of the guide pin 41 of the first supporting means 43 is greater than the cross-sectional area of the guide pin 41 of the second supporting means 44. By providing the first support device 43 and the second support device 44, the structure of the disc brake 100, for example, a pneumatic floating disc brake, can be stabilized. Moreover, by making the length of the guide pin 41 of the first supporting means 43 longer than the length of the guide pin 41 of the second supporting means 44, the first supporting means 43 can withstand a larger relative force, and the second supporting means 44 can save space and avoid interference with other parts.
Two support devices 4 are shown in fig. 1-3 for illustrative purposes, but it will be apparent to one of ordinary skill in the art after reading the teachings of the present disclosure that the teachings apply to other numbers of support devices 4 and remain within the scope of this disclosure.
The force applied by a disc brake 100, such as a pneumatic floating disc brake, according to a novel embodiment of the present application is analyzed in connection with fig. 4a and 5.
Wherein the brake caliper 3, the guide pin 41 of the first supporting device 43 and the guide pin 41 of the second supporting device 44 form a transverse first-stage cantilever structure of the disc brake 100, and the parts mounted on the brake caliper 3, such as the brake air chamber 5, form a second-stage cantilever structure of the disc brake 100, which is mounted at the free end of the first-stage cantilever structure, and the second-stage cantilever structure and the first-stage cantilever structure are collectively referred to as an integral two-stage cantilever structure. Wherein the brake chamber 5 can be mounted in a mounting hole 31 in the brake caliper 3. In the following description of the application, the integration of the brake chamber 5 in the brake caliper 3 is illustrated as an example.
The caliper support 2 can be fixedly connected to a chassis retarder housing (not shown) by means of bolts. When the vehicle is in an abnormal driving state, when the vehicle passes through a road section with poor road surface state, exciting force in a lower frequency range is transmitted to the brake air chamber 5 through components such as a chassis speed reducer shell and the like, so that the brake air chamber 5 of the disc brake 100 generates transverse and longitudinal large-amplitude swinging vibration and vertical vibration in a horizontal plane around the mounting hole 31, large-amplitude vibration and displacement are generated, then dynamic load and static load which are generated by the vibration and are far greater than self weight are transmitted to the brake caliper 3 of the disc brake 100 through the mounting hole 31, the brake caliper 3 vibrates vertically upwards and downwards around the mounting end surface of the threaded fastener 42 such as a bolt and the bulge 21, and generates relative motion trend and displacement, and exciting force in the lower frequency range also causes shearing vibration and generates relative motion trend and displacement of the brake caliper 3 of the disc brake 100 along the mounting end surface of the threaded fastener 42 and the brake caliper support 2, and dynamic load generated by the relative motion trend generated by the vibration of the brake air chamber 5 are mutually coupled with load generated by the relative motion trend of the brake caliper 3, so that complex vibration is formed.
When the disc brake 100 is subjected to the above-described strong vibration, vibration impact energy is transmitted to the guide pin 41 of the first supporting means 43 and the guide pin 41 of the second supporting means 44, and finally transmitted to the threaded fastener 42 of the first supporting means 43 and the threaded fastener 42 of the second supporting means 44. The threaded fastener 42 will be subjected to large vertical and longitudinal alternating load forces, the length of engagement of the existing threaded fastener with the caliper support is relatively short, the force is large, the guide pin cannot be subjected to vertical forces, and the threaded fastener is prone to fracture and failure.
Therefore, by arranging the protrusion 21, the engagement length between the threaded fastener 42 and the protrusion 21 is long, the protrusion 21 and the guide pin 41 surrounding the protrusion 21 can bear load together with the corresponding threaded fastener 42, so that the single stress situation of the threaded fastener 42 such as a bolt is changed, the highest stress level of the threaded fastener 42 such as the bolt is reduced, the service life of the threaded fastener 42 such as the bolt is prolonged, and meanwhile, the local installation rigidity can be improved through the fixed connection of the protrusion 21 and the guide pin 41 and the threaded fastener 42, so that the overall two-stage cantilever structure mode of the brake caliper 3 and the brake chamber 5 is improved, and vibration and noise are not easy to be caused by road surface excitation.
A vehicle, such as a commercial vehicle, according to an embodiment of the second aspect of the present application includes a disc brake 100 according to an embodiment of the first aspect of the present application described above.
According to the vehicle such as a commercial vehicle, the disc brake 100 is adopted, so that the threaded fastener 42 has long service life, the braking performance of the vehicle can be improved, and the safety of the vehicle is ensured.
Other components and operations of a vehicle according to embodiments of the application are known to those of ordinary skill in the art and will not be described in detail herein.
In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present application and to simplify the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.
In the description of the application, "first feature", "second feature", "third feature" may include one or more of such features.
In the description of the application, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples.
While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the application, the scope of which is defined by the claims and their equivalents.
Claims (11)
1. A disc brake, comprising:
a brake disc;
the brake caliper support is arranged above the brake disc, at least one protrusion is arranged on the brake caliper support, and a protrusion matching hole is formed in the protrusion;
the brake caliper is arranged on the brake caliper support, and at least one guide hole is formed in the brake caliper;
at least one support device, the support device includes the guide pin, be formed with along axial intercommunication's first mating hole and second mating hole on the guide pin, the second mating hole is connected in the first mating hole be away from the side of brake caliper support, protruding cooperation is in first mating hole, the screw thread fastener includes along the axial interconnect's of guide pin screw thread section and non-screw thread section, screw thread fastener passes one of second mating hole and protruding mating hole and with the screw thread connection in the other of second mating hole and protruding mating hole, the guide pin is mated in the guide hole, and the brake caliper is relative to the brake caliper support is along the axial of guide pin is movable, protruding one end face that is away from the brake caliper support is opposite with the non-screw thread section.
2. A disc brake according to claim 1, wherein the brake caliper is provided with a brake chamber.
3. The disc brake of claim 1, wherein the other of the second mating hole and the boss mating hole is threadably coupled to the threaded section.
4. A disc brake according to claim 1, wherein an end of the guide pin remote from the caliper support bracket is formed with a third fitting hole communicating with the second fitting hole,
the threaded fastener passes through the second matching hole and is in threaded connection with the protruding matching hole, and the head of the threaded fastener is positioned in the third matching hole, wherein the diameter of the head of the threaded fastener is larger than that of the second matching hole.
5. A disc brake according to claim 1, wherein the junction of the projection and the caliper support bracket is smoothly transitioned.
6. A disc brake according to any one of claims 1-5, wherein the guide pin comprises:
the body is provided with the first matching hole and the second matching hole;
the wear-resistant layer is arranged on the radial outer side of the body;
and the elastic buffer layer is connected between the body and the wear-resistant layer.
7. A disc brake according to claim 6, wherein the end surfaces of the wear-resistant layer are flush with the end surfaces of the body, respectively, and the elastic buffer layer covers the entire outer peripheral surface of the body.
8. A disc brake according to claim 6, wherein the wear-resistant layer is formed with openings penetrating in a thickness direction of the wear-resistant layer, and the openings penetrate through both end faces of the wear-resistant layer.
9. A disc brake according to claim 8, wherein the opening is formed in a lower portion of the wear layer.
10. A disc brake according to any one of claims 1 to 5, wherein the projection and the support means are two,
the two supporting devices are respectively a first supporting device and a second supporting device, the length of the guide pin of the first supporting device is larger than that of the guide pin of the second supporting device, and the cross section area of the guide pin of the first supporting device is larger than that of the guide pin of the second supporting device.
11. A vehicle comprising a disc brake according to any one of claims 1-10.
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|---|---|---|---|
| CN202011051773.4A CN114321218B (en) | 2020-09-29 | 2020-09-29 | Disc brake and vehicle with same |
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| CN202011051773.4A CN114321218B (en) | 2020-09-29 | 2020-09-29 | Disc brake and vehicle with same |
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| CN114321218A CN114321218A (en) | 2022-04-12 |
| CN114321218B true CN114321218B (en) | 2023-10-17 |
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|---|---|
| CN114321218A (en) | 2022-04-12 |
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