CN114321218A - Disc brake and vehicle with same - Google Patents
Disc brake and vehicle with same Download PDFInfo
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- CN114321218A CN114321218A CN202011051773.4A CN202011051773A CN114321218A CN 114321218 A CN114321218 A CN 114321218A CN 202011051773 A CN202011051773 A CN 202011051773A CN 114321218 A CN114321218 A CN 114321218A
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Abstract
The invention 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; at least one supporting device, the supporting device includes guide pin and threaded fastener, be formed with first cooperation hole and the second cooperation hole that communicates each other on the guide pin along the axial, the second cooperation hole is connected at the one side of keeping away from the brake caliper support of first cooperation hole, the protruding cooperation is in first cooperation hole, threaded fastener passes one of second cooperation hole and protruding cooperation hole and with the second cooperation hole and protruding threaded connection in another one of cooperation hole, the guide pin cooperation is in the guide pin, and the brake caliper is portable along the axial of guide pin. According to the disc brake, the stress borne by the threaded fastener can be reduced, and the service life of the threaded fastener is prolonged.
Description
Technical Field
The invention 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 a poor road surface condition for a long time, an impact load from the road surface is large and constantly changed, so that a brake caliper of a brake continuously generates severe and variable vibration, and the continuous severe vibration of the brake caliper causes a guide bolt to be broken due to a large alternating bending moment and shearing force or to be broken due to fatigue, thereby affecting driving safety.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, an object of the present invention is to provide a disc brake, which can reduce the stress on a threaded fastener, prevent the threaded fastener from being broken due to excessive stress or fatigue, prolong the service life of the threaded fastener, and improve the safety of a vehicle.
Another object of the invention is to propose a vehicle with the above disc brake.
A disc brake according to an embodiment of the present invention includes: a brake disc; the brake caliper support is arranged above the brake disc, at least one bulge is arranged on the brake caliper support, 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; at least one support device including a guide pin on which a first fitting hole and a second fitting hole communicating with each other in an axial direction are formed, the second fitting hole being connected to a side of the first fitting hole remote from the caliper support, the boss being fitted in the first fitting hole, and a threaded fastener passing through one of the second fitting hole and the boss fitting hole and threadedly connected with the other of the second fitting hole and the boss fitting hole, the guide pin being fitted in the guide hole, and the caliper being movable relative to the caliper support in the axial direction of the guide pin.
According to the disc brake provided by the embodiment of the invention, 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 communicated with each other 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 and is in threaded connection with the other one of the second matching hole and the protrusion matching hole, 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 can be prolonged, and the safety of a vehicle can be improved. Moreover, due to the arrangement, the threaded fastener can be firmly connected with the protrusion and the guide pin, so that the structural stability and the installation rigidity of the disc brake can be improved, and the disc brake is not easy to generate vibration and noise.
According to some embodiments of the invention, a brake chamber is provided on the brake caliper.
According to some embodiments of the present invention, the threaded fastener includes a threaded section and an unthreaded section that are connected to each other in the axial direction of the guide pin, the other of the second fitting hole and the boss fitting hole is threaded to the threaded section, and an end surface of the boss that is remote from the caliper support is opposite to the unthreaded section.
According to some embodiments of the present invention, an end of the guide pin remote from the caliper support is formed with a third fitting hole communicating with the second fitting hole, the threaded fastener passes through the second fitting hole and is threadedly coupled with the boss fitting hole, and a head of the threaded fastener is located in the third fitting hole, wherein a diameter of the head of the threaded fastener is larger than a diameter of the second fitting hole.
According to some embodiments of the invention, the junction of the projection and the caliper support is a smooth transition.
According to some embodiments of the invention, 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; the elastic buffer layer is connected between the body and the wear-resistant layer.
According to some embodiments of the invention, two end faces of the wear-resistant layer are flush with two end faces of the body respectively, and the elastic buffer layer covers the whole peripheral surface of the body.
According to some embodiments of the present invention, the wear-resistant layer is formed with an opening penetrating in a thickness direction of the wear-resistant layer, and the opening penetrates both end faces of the wear-resistant layer.
According to some embodiments of the invention, the opening is formed in a lower portion of the wear resistant layer.
According to some embodiments of the invention, the projection and the support means are two, the two support means are a first support means and a second support means, respectively, the length of the guide pin of the first support means is greater than the length of the guide pin of the second support means, and the cross-sectional area of the guide pin of the first support means is greater than the cross-sectional area of the guide pin of the second support means.
A vehicle according to an embodiment of the second aspect of the invention includes the disc brake according to the above-described embodiment of the first aspect of the invention.
Additional aspects and advantages of the invention 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 invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a partial perspective view of a disc brake according to an embodiment of the present invention;
FIG. 2 is an exploded view of a disc brake according to an embodiment of the present invention;
FIG. 3 is a top view of a disc brake according to an embodiment of the present invention;
FIG. 4a is a partial cross-sectional view of a disc brake according to an embodiment of the present invention;
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 invention;
FIG. 6 is an enlarged fragmentary 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 invention;
FIG. 8 is a cross-sectional view taken along line A-A of FIG. 7;
fig. 9 is a structural schematic view of a guide pin of a second supporting device of the disc brake according to an embodiment of the present invention;
fig. 10 is a sectional view taken along line B-B in fig. 9.
Reference numerals:
100: a disc brake;
1: a brake disc; 2: a brake caliper support; 21: a protrusion; 211: a boss mating hole;
3: a brake caliper; 31: mounting holes; 4: a support device; 41: a guide pin;
411: a first mating hole; 412: a second mating hole; 413: a body;
414: a wear layer; 4141: an opening; 415: an elastic buffer layer;
416: a third mating hole; 42: a threaded fastener; 421: a threaded segment;
422: a non-threaded section; 43: a first support device; 431: a first dust cover;
44: a second support means; 441: a second dust cover; 5: a brake chamber.
Detailed Description
Embodiments of the present invention will be described in detail below, the embodiments described with reference to the drawings being illustrative, and the embodiments of the present invention will be described in detail below.
A disc brake 100 according to an embodiment of the first aspect of the invention 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, the disc brake 100 is explained as an example applied to a vehicle.
As shown in fig. 1 to 3, a disc brake 100, for example, an air-operated floating disc brake, according to an embodiment of the first aspect of the present invention includes a brake disc 1, a caliper support 2, a caliper 3, and at least one support device 4.
Specifically, the caliper support 2 is provided above the brake disc 1, at least one projection 21 is provided on the caliper support 2, a projection fitting hole 211 is formed on the projection 21, the brake caliper 3 is provided on the caliper support 2, at least one guide hole is formed on the brake 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 that 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 that is away from the caliper support 2, the projection 21 is fitted in the first fitting hole 411, the threaded fastener 42 passes through one of the second fitting hole 412 and the projection fitting hole 211 and is threadedly connected to the other of the second fitting hole 412 and the projection fitting hole 211, the guide pin 41 is fitted in the guide hole, and the brake caliper 3 is movable relative to the caliper support 2 in the axial direction of the guide pin 41. That is, the threaded fastener 42 passes through the second mating hole 412 and is threadedly coupled with the protrusion mating hole 211, or the threaded fastener 42 passes through the protrusion mating hole 211 and is threadedly coupled with the second mating hole 412. Alternatively, the threaded fastener 42 may be a bolt, and the caliper support 2 and the caliper 3 may be cast iron material pieces. But is not limited thereto.
Therefore, when a vehicle runs on a road with a poor road surface state, impact load from the road surface can be transmitted to the brake caliper 3 and vibration of the brake caliper 3 is caused, the brake caliper 3 can transmit the vibration to the guide pin 41, radial movement of the guide pin 41 relative to the brake caliper support 2 can be limited due to the fact that the protrusion 21 is matched in the first matching hole 411 on the guide pin 41, the guide pin 41 can surround the protrusion 21, the guide pin 41 and the threaded fastener 42 can bear certain load, and compared with an existing disc brake, stress borne by the threaded fastener 42 can be greatly reduced (for example, stress borne by the threaded fastener 42 under the same working condition can be reduced by more than 60%). Moreover, the matching length of the threaded fastener 42 and the brake caliper support 2 can be increased by the protrusion 21, when the brake caliper 3 vibrates, the protrusion 21 and the threaded fastener 42 can bear impact load, and stress borne by the threaded fastener 42 can be reduced, so that the threaded fastener 42 can be prevented from being broken due to large alternating bending moment and shearing force or fatigue, the service life of the threaded fastener 42 is prolonged, and the running safety of a vehicle is ensured. Further, by making the caliper 3 movable relative to the caliper support 2, the caliper 3 can be moved toward the brake disc 1 in the axial direction of the guide pin 41 during braking, and the brake disc 1 is sandwiched by the caliper 3, so that the brake disc 1 generates a frictional torque on the wheel shaft of the vehicle, thereby braking the vehicle.
According to the disc brake 100 of the embodiment of the invention, the at least one protrusion 21 is arranged on the 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 and is in threaded connection with the other of the second matching hole 412 and the protrusion matching hole 211, the matching length of the threaded fastener 42 and the caliper support 2 can be effectively increased, the protrusion 21 and the guide pin 41 can share impact load, the stress borne by 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. Furthermore, with this arrangement, the threaded fastener 42 can be securely coupled to both the boss 21 and the guide pin 41, so that the structural stability and mounting rigidity of the disc brake 100 can be improved, making the disc brake 100 less prone to vibration and noise.
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, it is possible to achieve a close fitting of the projection 21 with the first fitting hole 411, thereby effectively restricting the radial movement of the guide pin 41 with respect to the caliper support 2, and improving the structural stability of the entire disc brake 100, such as an air-operated floating disc brake. Moreover, by making the outer surface of the boss 21 smooth, the frictional force between the outer surface of the boss 21 and the inner wall surface of the first fitting hole 411 can be reduced, facilitating the mounting and dismounting, and improving the mounting and dismounting efficiency.
In some embodiments of the invention, brake caliper 3 is provided with a brake chamber 5, as shown in fig. 2-4 a and 5. Therefore, the brake air chamber 5 is arranged on the brake caliper 3, on 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 space layout of the disc brake 100 on a vehicle is facilitated; on the other hand, because the brake caliper support 2 is provided with the protrusions 21, the service life of the threaded fastener 42 can be effectively prolonged, and the brake air chamber 5 arranged in this way can make full use of the strength of the threaded fastener 42 on the basis of ensuring that the service life requirement of the threaded fastener 42 is met, namely, the phenomenon that the strength of the threaded fastener 42 such as a bolt has excessive overflow relative to the use requirement is avoided.
In some embodiments of the present invention, referring to fig. 4a to 5, the threaded fastener 42 includes a threaded section 421 and an unthreaded 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 connected to the threaded section 421, and an end surface (e.g., a right end in fig. 4a to 5) of the boss 21 remote from the caliper support 2 is opposed to the unthreaded section 422. Therefore, as the part of the threaded fastener 42 opposite to the end face of the boss 21 far away from the end face of the brake caliper support 2 can bear the alternating shear force, the non-threaded section 422 of the threaded fastener 42 is opposite to the end face, the non-threaded section with higher structural strength can bear the alternating shear force instead of the threaded section with lower structural strength, the risk of crack generation 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 invention, referring to fig. 4a to 6 in combination with fig. 8 and 10, an 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 a head of the threaded fastener 42 is located within the third fitting hole 416, wherein a diameter of the head of the threaded fastener 42 is larger than a diameter of the second fitting hole 412. Therefore, due to the arrangement of the protrusion 21, the protrusion matching hole 211 has a larger length, the engagement length of the threaded fastener 42, such as a bolt, with the protrusion matching hole 211 can be increased, the protrusion 21 can better bear vibration load and impact load together with the threaded fastener 42, the highest stress level of the threaded fastener 42 is reduced, and the service life of the threaded fastener 42 is effectively prolonged. Moreover, since the threaded fastener 42 is generally a standard component, it is provided that the length of the projection 21 projecting outward 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 projection 21 remote from the caliper support 2 can be opposed to the unthreaded section 422 of the threaded fastener 42, thereby preventing the threaded fastener 42 from being broken and extending the service life. In addition, by providing the third engagement hole 416 as described above, the head of the threaded fastener 42 can be accommodated in the third engagement hole 416, so that the occupied space of the threaded fastener 42 can be reduced, and the entire disc brake 100, for example, an air-operated floating disc brake, can be made more compact. Further, 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 held in the third fitting hole 416, so that the firm connection of the guide pin 41 and the boss 21 can be achieved, ensuring the structural stability of the entire disc brake 100.
Of course, the present invention is not limited thereto, and in other embodiments of the present invention, the threaded fastener 42 may pass through the boss fitting hole 211 and be threadedly coupled with the second fitting hole 412. It will be appreciated that the manner in which the threaded fastener 42 is installed may be specifically determined according to 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 device 43 remote from the caliper support 2 is provided with a first dust cover 431 and the end of the guide pin 41 of the second support device 44 remote from the caliper support 2 is provided with a second dust cover 441. In this way, the first dust cover 431 and the second dust cover 441 can effectively protect the corresponding guide pins 41, and prevent foreign matters such as external dust from entering the guide pins 41.
In some embodiments of the invention, and with reference to fig. 4 a-6, the junction of the projection 21 and the caliper support 2 is smoothly blended. So set up, the transition between arch 21 and the brake caliper support 2 can be more smooth and smooth, can improve the local stress of the junction of arch 21 and brake caliper support 2, avoids the junction of arch 21 and brake caliper support 2 to produce stress concentration to joint strength between arch 21 and the brake caliper support 2 can improve.
In some embodiments of the invention, 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, a first fitting hole 411 and a second fitting hole 412 are formed in the body 413, the wear-resistant layer 414 is provided on the radially outer side of the body 413, and the elastic buffer layer 415 is connected between the body 413 and the wear-resistant layer 414. Thus, since the caliper 3 moves in the axial direction of the guide pin 41 relative to the caliper support 2 during braking, the guide pin 41 can better resist mechanical wear by providing the wear-resistant layer 414, and the service life of the guide pin 41 can be effectively extended. Through setting up foretell elastic buffer layer 415, elastic buffer layer 415 can produce and warp to effectively absorb vibration and impact, when the noise reduction, can reduce the impact force of transmitting to threaded fastener 42, and then can prevent threaded fastener 42 fracture, further prolong threaded fastener 42's life. Wherein the elastic buffer layer 415 can be tightly combined with the wear layer 414 through a vulcanization process. But is not limited thereto.
In a further embodiment of the present invention, referring to fig. 7 and 8, both end faces of the wear-resistant layer 414 are flush with both end faces of the body 413, respectively, and the elastic buffer layer 415 covers the entire outer circumferential surface of the body 413. With such an arrangement, it is ensured that only the wear-resistant layer 414 is in contact with the brake caliper 3 when the brake caliper 3 moves in the axial direction of the guide pin 41, so that the movement of the brake caliper 3 is more stable, and the structural strength and the structural stability of the guide pin 41 can be ensured. Moreover, the elastic buffer layer 415 arranged in this way can better absorb vibration and impact, avoid the impact load from being directly transmitted to the body 413 from the wear-resistant layer 414, and have stronger impact-resistant effect, so that the threaded fastener 42 can be further prevented from being broken, and the safety of the vehicle can be ensured.
In some embodiments of the present invention, as shown in fig. 7 and 8, an opening 4141 penetrating in the thickness direction of the wear-resistant layer 414 is formed in the wear-resistant layer 414, and the opening 4141 penetrates both end faces 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 openings 4141 are formed in the wear-resistant layer 414, so that the wear-resistant layer 414 can better transmit the vibration and the impact to the elastic buffer layer 415, the stress borne by the threaded fastener 42 is reduced, and the openings 4141 arranged in this way enable the wear-resistant layer 414 to deform to a certain extent when the elastic buffer layer 415 deforms, and the brake caliper is simple in structure and convenient to process.
In some embodiments of the present invention, referring to fig. 7, an opening 4141 is formed in a lower portion of the wear resistant layer 414. Since the caliper 3 is movable relative to the caliper support 2 in the axial direction of the guide pin 41, the guide pin 41 is in clearance fit with the guide hole. The inner wall of the guide hole of the caliper 3 is normally in contact with the upper portion of the guide pin 41 by gravity, and the inner wall of the guide hole of the caliper 3 has a certain gap with the lower portion of the guide pin 41. Accordingly, by forming the opening 4141 at the lower portion of the wear-resistant layer 414, it is possible to prevent the occurrence of severe wear due to line contact between the brake caliper 3 and the end portion of the opening 4141 during the axial movement of the guide pin 41, thereby effectively reducing the wear of the opening 4141 and extending the service life of the wear-resistant layer 414. In some embodiments, the end of the opening 4141 may be ground to provide a smooth configuration for at least the portion of the opening 4141 facing the caliper 31. In this way, the wear of the opening can be further reduced, further ensuring a higher service life of the wear resistant layer 414.
In some alternative embodiments of the present invention, the elastic buffer layer 415 may be a rubber layer. Therefore, the rubber has better vibration reduction, sound insulation and buffering performances, and the elastic buffer layer 415 is a rubber layer, so that vibration and impact energy can be better absorbed, and the vibration reduction and noise reduction effects on the brake caliper 3 are realized. The thickness and rigidity of the rubber layer can be calculated from the amount of deformation of the rubber layer caused by the impact load applied to the brake caliper 3.
In some alternative embodiments of the present invention, the wear layer 414 is a metal layer having a smooth outer surface. With the arrangement, the outer surface of the wear-resistant layer 414 has high smoothness, and when the brake caliper 3 moves relative to the brake caliper support 2 along the axial direction of the guide pin 41, the 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 the braking distance can be shortened, and timely braking can be realized.
In some embodiments of the present invention, as shown in fig. 2, the protrusion 21 and the supporting device 4 are two, the two supporting devices 4 are a first supporting device 43 and a second supporting device 44, respectively, the length of the guide pin 41 of the first supporting device 43 is greater than the length of the guide pin 41 of the second supporting device 44, and the cross-sectional area of the guide pin 41 of the first supporting device 43 is greater than the cross-sectional area of the guide pin 41 of the second supporting device 44. Thus, by providing the first support device 43 and the second support device 44 described above, the structure of the disc brake 100, for example, an air floating disc brake, can be further stabilized. Moreover, by making the length of the guide pin 41 of the first supporting device 43 greater than the length of the guide pin 41 of the second supporting device 44, the first supporting device 43 can bear a larger relative force, and the second supporting device 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 is obvious that a person skilled in the art, after reading the present application, will understand that this solution can be applied to other number of support devices 4, which also falls within the scope of the present invention.
The force of a disc brake 100, such as an air-float disc brake, according to the novel embodiment of the present invention is analyzed in connection with fig. 4a and 5.
The caliper 3, the guide pin 41 of the first support device 43, and the guide pin 41 of the second support device 44 form a lateral first-stage cantilever structure of the disc brake 100, a component mounted on the caliper 3, such as the brake chamber 5, forms a second-stage cantilever structure of the disc brake 100, the second-stage cantilever structure is mounted on a 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. The brake chamber 5 can be mounted in a mounting hole 31 of the brake caliper 3. In the following description of the present application, the brake chamber 5 is integrated in the caliper 3 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, excitation force in a low frequency range is generated due to uneven road surface and transmitted to the brake chamber 5 through components such as a chassis reducer shell and the like, so that the brake 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 far larger than self weight generated by vibration are transmitted to the brake caliper 3 of the disc brake 100 through the mounting hole 31, the brake caliper 3 vibrates vertically around the mounting end surface of a threaded fastener 42 such as a bolt and a bulge 21 and generates relative movement trend and displacement, the excitation force in the low frequency range also causes the brake caliper 3 of the disc brake 100 to generate shearing vibration and generate relative movement trend and displacement along the longitudinal direction along the mounting end surface parts of the threaded fastener 42 and the brake caliper support 2, the relative motion and the dynamic and static loads generated by the vibration of the brake chamber 5 are coupled with the loads generated by the relative motion trend of the brake caliper 3 to form complex vibration.
When the above-described strong vibration occurs in the disc brake 100, the vibration impact energy is transmitted to the guide pins 41 of the first and second supporting devices 43 and 44 and finally to the threaded fasteners 42 of the first and second supporting devices 43 and 44. The threaded fastener 42 can bear large vertical and longitudinal alternating load acting force, the meshing length of the conventional threaded fastener and the brake caliper support is relatively short, the stress is large, the guide pin cannot bear vertical force, and the threaded fastener is easy to break and fail.
Therefore, by arranging the boss 21, the engagement length of the threaded fastener 42 and the boss 21 is long, the boss 21 and the guide pin 41 surrounding the boss 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 a bolt is reduced, the service life of the threaded fastener 42 such as a bolt is prolonged, meanwhile, the boss 21, the guide pin 41 and the threaded fastener 42 are fixedly connected, the local mounting rigidity can be improved, the integral two-stage cantilever structure mode of the brake caliper 3 and the brake air chamber 5 is improved, and the brake caliper is not easy to be excited by a road surface to cause vibration and noise.
A vehicle, such as a commercial vehicle, according to an embodiment of the second aspect of the invention includes a disc brake 100 according to the above-described embodiment of the first aspect of the invention.
According to the vehicle such as a commercial vehicle provided by the embodiment of the invention, by adopting the disc brake 100, the threaded fastener 42 has a longer service life, so that the braking performance of the vehicle can be improved, and the safety of the vehicle can be ensured.
Other configurations and operations of vehicles according to embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.
In the description of the present invention, it is to 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", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
In the description of the present invention, "the first feature", "the second feature", and "the third feature" may include one or more of the features.
In the description of the invention, "above", "over" and "above" a first feature in a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean 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 invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, 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 bulge is arranged on the brake caliper support, 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;
at least one support device including a guide pin on which a first fitting hole and a second fitting hole communicating with each other in an axial direction are formed, the second fitting hole being connected to a side of the first fitting hole remote from the caliper support, the boss being fitted in the first fitting hole, and a threaded fastener passing through one of the second fitting hole and the boss fitting hole and threadedly connected with the other of the second fitting hole and the boss fitting hole, the guide pin being fitted in the guide hole, and the caliper being movable relative to the caliper support in the axial direction of the guide pin.
2. The disc brake of claim 1, wherein a brake chamber is provided on the brake caliper.
3. The disc brake of claim 1, wherein the threaded fastener includes a threaded section and an unthreaded section that are connected to each other in the axial direction of the guide pin, the other of the second fitting hole and the boss fitting hole being threaded with the threaded section, and an end surface of the boss that is remote from the caliper support being opposite to the unthreaded section.
4. The disc brake of claim 1, wherein an end of the guide pin remote from the caliper support is formed with a third fitting hole that communicates with the second fitting hole,
the threaded fastener penetrates through the second matching hole and is in threaded connection with the protrusion matching hole, the head of the threaded fastener is located in the third matching hole, and the diameter of the head of the threaded fastener is larger than that of the second matching hole.
5. The disc brake of claim 1, wherein the junction of the projection and the caliper support is a smooth transition.
6. The disc brake of any one of claims 1-5, characterized in that 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;
the elastic buffer layer is connected between the body and the wear-resistant layer.
7. The disc brake of claim 6, wherein both end faces of the wear layer are flush with both end faces of the body, respectively, and the elastic buffer layer covers the entire outer peripheral surface of the body.
8. The disc brake according to claim 6, wherein the wear-resistant layer is formed with openings that penetrate in the thickness direction of the wear-resistant layer, and the openings penetrate both end faces of the wear-resistant layer.
9. The disc brake of claim 8, wherein the opening is formed in a lower portion of the wear layer.
10. The disc brake of any one of claims 1 to 5, characterized in that the projection and the support means are both two,
the two support devices are respectively a first support device and a second support device, the length of the guide pin of the first support device is larger than that of the guide pin of the second support device, and the cross-sectional area of the guide pin of the first support device is larger than that of the guide pin of the second support device.
11. A vehicle, characterized in that it comprises 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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