Disc brake

Abstract

The utility model discloses a disc brake which comprises a brake disc and calipers, the brake disc is arranged on a wheel and rotates together with the wheel, and the brake disc comprises a first brake surface and a second brake surface which are opposite to each other; the caliper comprises a first body part oppositely arranged on the first brake surface and a second body part oppositely arranged on the second brake surface, the caliper further comprises a connecting bridge part, and the first body part and the second body part are connected through the connecting bridge part so that the caliper can span the brake disc; the first body part is provided with a first brake oil branch, the second body part is internally provided with a second brake oil branch, and the first brake oil branch and the second brake oil branch are communicated through a third brake oil branch arranged in the connecting bridge part to form a brake oil channel. According to the brake device, the complete brake oil channel through which the brake oil flows is formed in the first body part, the second body part and the connecting bridge part, so that a hydraulic oil channel does not need to be externally arranged, the structure is more compact, and the space occupancy rate is lower.

Description

TECHNICAL FIELD

[0001] The utility model relates to university student formula racing car technical field especially disc brake. BACKGROUND

[0002] The connecting bridge structure and hydraulic system are externally arranged on the caliper in the related technology, which makes the volume of the caliper too large. CONTENT

[0003] The utility model discloses at least one of the technical problems in the prior art is solved, for this purpose, one purpose of the utility model is to provide a disc brake, and the structure of the caliper is more compact, which is beneficial to reduce the space occupied by the disc brake.

[0004] According to the disc brake of the utility model embodiment, the disc brake includes a brake disc and a caliper, the brake disc is arranged on a wheel and rotates together and includes a first braking surface and a second braking surface which are opposite to each other, the caliper includes a first body part opposite to the first braking surface and a second body part opposite to the second braking surface, the caliper further includes a connecting bridge part, the first body part and the second body part are connected through the connecting bridge part to cross the caliper on the brake disc, the first body part is provided with a first brake oil branch, the second body part is provided with a second brake oil branch, the first brake oil branch and the second brake oil branch are communicated through a third brake oil branch arranged in the connecting bridge part and form a brake oil channel.

[0005] In some embodiments, the first body part and the second body part are both provided with a brake member, the brake member includes at least two pistons communicated with the brake oil channel and a friction member arranged on the movable end of the piston, and the piston is used to push the friction member to contact the braking surface.

[0006] In some embodiments, the friction member includes a brake pad and a friction plate detachably mounted on the brake pad.

[0007] In some embodiments, the first body part and / or the second body part are provided with a first fastening hole, and the brake pad is provided with a mounting lug; the disc brake further includes a bolt for penetrating the first fastening hole and the mounting lug.

[0008] In some embodiments, the caliper is provided with a drain bolt, the drain bolt is communicated with the brake oil channel and can be opened and closed.

[0009] In some embodiments, the first body part is located between the brake disc and the wheel, and the first body part is provided with an oil inlet communicated with the brake oil channel.

[0010] In some embodiments, the first body part and the second body part both extend along a circumferential direction of the brake disc.

[0011] In some embodiments, the caliper further comprises a caliper mounting structure, the caliper mounting structure comprising two connecting cantilevers for fixing the caliper on a transmission system; the two connecting cantilevers are respectively fixed on two sides of the first body part in the extending direction, and the connecting cantilevers are configured as curved arms protruding from the rotation center of the brake disc.

[0012] In some embodiments, a plurality of central-symmetrical heat dissipation holes are formed on the brake disc.

[0013] In some embodiments, in a direction away from the center of the brake disc, the brake disc is sequentially provided with a first heat dissipation hole group and a second heat dissipation hole group, the first heat dissipation hole group comprising a plurality of first heat dissipation holes, and the second heat dissipation hole group comprising a plurality of second heat dissipation holes, the size of the first heat dissipation holes being smaller than the size of the second heat dissipation holes.

[0014] It can be seen from the technical scheme that the embodiments provided by the utility model have the following advantages: (1) the first body part and the second body part are connected through the connecting bridge part, the inside of the first body part, the second body part and the connecting bridge part is provided with a complete brake oil channel through which brake oil flows, thus without externally provided hydraulic oil channel, the structure is more compact, the space occupancy is lower, which is beneficial to reducing the size of the disc brake, so that it can be installed on the university student formula racing car with extremely limited wheel space; (2) the internal oil channel is set up, the oil pressure speed is faster, the durability is better, and the response speed is faster; (3) the caliper straddles the brake disc, can respectively frictionally brake with the first brake surface and the second brake surface of the brake disc, and improves the braking efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creative labor.

[0016] Figure 1 It is the overall structure schematic diagram of the disc brake according to the embodiment of the utility model;

[0017] Figure 2 It is the explosion structure schematic diagram of the caliper according to the embodiment of the utility model;

[0018] Figure 3 It is the assembly schematic diagram of the brake disc and the floating pin according to the embodiment of the utility model;

[0019] Figure 4 Fig. 1 is a structural schematic diagram of a floating pin according to an embodiment of the present application.

[0020] Reference signs:

[0021] Disc brake 100;

[0022] Brake disc 1, first brake face 11, second brake face 12, first heat dissipation hole group 13, first heat dissipation hole 131, second heat dissipation hole group 14, second heat dissipation hole 141;

[0023] Caliper 2, first body part 21, first connecting bridge 211, oil inlet 212, second body part 22, second connecting bridge 222, third brake oil branch 2221, first fastening hole 23, second fastening hole 24, connecting cantilever 25;

[0024] Brake member 3, piston 31, friction member 32, brake pad 321, mounting lug 3211, friction plate 322;

[0025] Oil drain bolt 4;

[0026] Floating pin 5, floating pin body 51, clasp 52, flat washer 53, spring washer 54;

[0027] Latch 6;

[0028] Fastener 7. DETAILED DESCRIPTION

[0029] Embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are only used to explain the present application and cannot be understood as a limitation of the present application.

[0030] In the description of the utility model, it is necessary to understand that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as a limitation on the utility model. Therefore, the features limited by "first" and "second" can be explicitly or implicitly included one or more features. In the description of the utility model, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0031] In the description of the utility model, it should be pointed out that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0032] In the related art, the rim size of the university student formula racing car wheel is small, and the rim space is limited. The disc brake is used for mounting on the wheel of the racing car. The disc brake includes a brake disc and a caliper, and the caliper straddles the brake disc. The caliper is fixed in position, and the brake disc rotates with the wheel. The caliper can contact and rub with the brake disc to brake the wheel. During braking, the support force of the caliper on the brake disc will react on the caliper, and the caliper needs to have sufficient strength to resist the support force. Therefore, in the related art, a connecting bridge is arranged on the radial outer side of the caliper, and a hydraulic oil channel is arranged outside the caliper to increase the strength of the caliper.

[0033] However, when the applicant assembles the above-mentioned disc brake on the wheel of the university student formula racing car, the volume of the disc brake is too large to be suitable for the racing car wheel with small rim size.

[0034] Therefore, the applicant designs a disc brake, which sets the oil channel inside the caliper, so that the structure of the disc brake is more compact, which is beneficial to reduce the size of the disc brake, so that it can be installed on the university student formula racing car with extremely limited rim space.

[0035] Reference will now be made to Figures 1-4 The disc brake 100 according to the embodiment of the utility model is described.

[0036] Example 1

[0037] like Figures 1-3 As shown, this embodiment provides a disc brake 100. The disc brake 100 includes a brake disc 1 and a caliper 2. The brake disc 1 includes a first braking surface 11 and a second braking surface 12 that are opposite to each other. The caliper 2 includes a first body portion 21 disposed opposite to the first braking surface 11 and a second body portion 22 disposed opposite to the second braking surface 12.

[0038] like Figure 3 As shown, the first body portion 21 and the second body portion 22 are located on opposite sides of the brake disc 1. The caliper 2 also includes a connecting bridge portion that connects the first body portion 21 and the second body portion 22, and the connecting bridge portion spacees the first body portion 21 and the second body portion 22 axially across the brake disc 1 so that the caliper 2 can straddle the brake disc 1.

[0039] The caliper 2 straddles the brake disc 1 and can perform friction braking with the first braking surface 11 and the second braking surface 12 of the brake disc 1 respectively, thereby improving braking efficiency.

[0040] The first body section 21 has a first brake fluid branch, the second body section 22 has a second brake fluid branch, and the connecting bridge section has a third brake fluid branch 2221. The third brake fluid branch 2221 is used to connect the first brake fluid branch and the second brake fluid branch, thereby forming a brake fluid passage for the passage of brake fluid inside the caliper 2.

[0041] Based on the technical solution, it can be seen that the embodiments provided by this utility model have the following advantages: (1) The first body part 21 and the second body part 22 are connected by a connecting bridge. The first body part 21, the second body part 22 and the connecting bridge are provided with complete brake oil passages through which brake oil flows. Therefore, there is no need for external hydraulic oil passages, the structure is more compact, the space occupancy rate is lower, which is conducive to reducing the size of the disc brake 100, so that it can be installed on Formula Student racing cars with extremely limited wheel space; (2) The internal oil passages are set up, the oil pressure is established faster, the durability is better, and the response speed is faster; (3) The caliper 2 straddles the brake disc 1 and can perform friction braking with the first brake surface 11 and the second brake surface 12 of the brake disc 1 respectively, thereby improving the braking efficiency.

[0042] like Figure 2As shown, further, in a specific example, the first body portion 21 extends along the rotation center direction of the brake disc 1, and the first body portion 21 is provided with a plurality of first connecting bridges 211, which are spaced apart along the extension direction; the second body portion 22 is provided with the same number of second connecting bridges 222 corresponding to the first connecting bridges 211 on the first body portion 21, and the first connecting bridges 211 and the second connecting bridges 222 are connected to form a connecting bridge portion and the caliper 2 straddles the brake disc 1. At least one first connecting bridge 211 and the corresponding second connecting bridge 222 are provided with a third brake oil branch 2221, and the other first connecting bridges 211 and the corresponding second connecting bridges 222 are provided with first fastening holes 23, and the fastener 7 passes through the second fastening holes 24 to connect the first connecting bridges 211 and the second connecting bridges 222, thereby connecting the first body portion 21 and the second body portion 22.

[0043] Example 2

[0044] like Figure 2 As shown, this embodiment is basically the same as the first embodiment, except that: both the first body part 21 and the second body part 22 are provided with a braking component 3. The braking component 3 includes at least two pistons 31 that communicate with the brake oil passage and a friction component 32 provided at the movable end of the piston 31. The piston 31 can push the friction component 32 to contact the braking surface.

[0045] like Figure 2 As shown, the first body 21 has a mounting space for mounting the brake element 3, which includes a friction element 32 and at least two pistons 31. This means that at least two pistons 31 are used to drive one friction element 32. A smaller ratio of piston 31 area to friction element 32 area is beneficial for uneven pressure distribution on the friction element 32, reducing stress concentration and resulting in more uniform wear of the friction element 32, thus leading to a more even distribution of braking force.

[0046] like Figure 2 As shown, it can be understood that the second body part 22 also has a mounting space for mounting the brake element 3, which includes a friction element 32 and at least two pistons 31. That is to say, a friction element 32 is driven by at least two pistons 31. The ratio of the piston 31 area to the friction element 32 area is smaller, which is beneficial for uneven pressure distribution on the friction element 32, reduces stress concentration, and makes the wear of the friction element 32 more uniform, thereby making the braking force distribution more uniform.

[0047] The friction element 32 on the first body part 21 is pushed to the first braking surface 11 by the piston 31, and the friction element 32 rubs against the first braking surface 11 to complete braking. Similarly, the friction element 32 on the second body part 22 is pushed to the second braking surface 12 by the piston 31, and the friction element 32 rubs against the second braking surface 12 to complete braking.

[0048] As Figure 2 shown, further, the friction member 32 comprises a brake pad 321 and a friction plate 322 detachably mounted on the brake pad 321. By providing the brake pad 321, it is beneficial to provide reliable support force for the friction plate 322. When the piston 31 pushes the friction member 32 to abut against the brake disc 1, the brake force of the friction plate 322 on the brake disc 1 may cause the friction plate 322 to warp, and by providing the brake pad 321, the rigidity of the friction plate 322 is improved; at the same time, the friction plate 322 can be replaced after being subjected to the braking action, improving the stability of the braking.

[0049] As Figure 1 and Figure 2 shown, further, the first body part 21 and / or the second body part 22 is provided with a first fastening hole 23, and the brake pad 321 is provided with a mounting lug 3211; the disc brake 100 further comprises a plug pin 6 for penetrating the first fastening hole 23 and the mounting lug 3211. By connecting the caliper 2 and the brake pad 321 through the plug pin 6, the brake pad 321 with the friction plate 322 can be more conveniently taken off from the first body part 21 or the second body part 22, thereby improving the convenience of replacing the friction plate 322.

[0050] Example Three

[0051] As Figure 2 shown, the present embodiment is basically the same as the first embodiment, the difference is that the caliper 2 is provided with a drain bolt 4, which is in communication with the brake oil channel and can be opened and closed. By loosening the drain bolt 4, the brake oil channel can be vented, which can effectively solve the problem of insufficient hydraulic pressure caused by air in the brake oil channel, thereby improving the braking efficiency.

[0052] Example Four

[0053] As Figure 1 and Figure 2 shown, the present embodiment is basically the same as the first embodiment, the difference is that the first body part 21 is located between the brake disc 1 and the wheel, and the first body part 21 is provided with an oil inlet 212 in communication with the brake oil channel. In the axial direction of the brake disc 1, a certain axial space is maintained between the brake disc 1 and the wheel, the first body part 21 is located between the wheel and the brake disc 1, and the first body part 21 is closer to the vehicle body, therefore the oil inlet 212 is provided on the first body part 21 to communicate with the hydraulic system provided in the vehicle, which can reduce the connection pipeline and the travel distance of the hydraulic oil, and further reduce the volume of the disc brake 100.

[0054] Example Five

[0055] As Figure 1 and Figure 2As shown, this embodiment is basically the same as the first embodiment, except that: both the first body part 21 and the second body part 22 extend along the circumferential direction of the brake disc 1, thereby further utilizing the limited space and improving the space utilization rate.

[0056] like Figure 1 and Figure 2 As shown, the caliper 2 further includes a caliper mounting structure, which includes two connecting arms 25. The connecting arms 25 are used to fix the caliper 2 to the transmission system. The two connecting arms 25 are respectively fixed to both sides of the first body part 21 in the extending direction, and the connecting arms 25 are constructed as curved arms protruding from the rotation center of the brake disc 1. Thus, a triangular structure can be formed between the connecting arms 25 and the first body part 21, which increases the stability of the structure; at the same time, the connecting arms 25 are constructed as curved arms protruding from the rotation center of the brake disc 1, which not only saves space, but also improves the bending strength of the connecting arms 25.

[0057] Specifically, the connecting cantilever 25 is provided with at least one caliper mounting point, which can be connected and fixed to the column on the wheel.

[0058] Example 6

[0059] like Figure 3 and Figure 4 As shown, this embodiment is basically the same as embodiment one, except that: the brake disc 1 has several centrally symmetrical heat dissipation holes. When the caliper 2 rubs against the brake disc 1, a large amount of heat is generated. At this time, the heat dissipation holes on the brake disc 1 play a role in dissipating heat, which can improve braking efficiency and effectively prevent brake failure. It can also suppress braking noise, reduce weight, and keep the surface of the brake disc 1 clean. The centrally symmetrical arrangement of the heat dissipation holes can improve the uniformity of heat dissipation, help reduce the deformation or warping of the brake disc 1, and improve the stability of the brake disc 1 during rotation.

[0060] like Figure 3 and Figure 4 As shown, the disc brake 100 further includes a floating pin 5, through which the brake disc 1 is connected to the wheel to rotate with the wheel. The floating pin 5 includes a floating pin body 51, a spring washer 54, a flat washer 53, and a retaining ring 52, all of which are fitted onto the floating pin body 51. The brake disc 1 is positioned between the spring washer 54 and the floating pin body 51. The spring washer 54 provides axial floating space for the brake disc 1 to expand due to heat, preventing the brake disc 1 from being crushed. The flat washer 53 prevents the surface of the floating pin 5 from being worn and damaged during installation. The retaining ring 52 secures the floating pin 5 to the wheel flange.

[0061] like Figure 3and Figure 4 As shown, further, in the direction away from the center of the brake disc 1, the brake disc 1 is sequentially provided with a first heat dissipation hole group 13 and a second heat dissipation hole group 14, the first heat dissipation hole group 13 includes a plurality of first heat dissipation holes 131, and the second heat dissipation hole group 14 includes a plurality of second heat dissipation holes 141, the size of the first heat dissipation holes 131 is smaller than the size of the second heat dissipation holes 141. On the one hand, during braking, a large amount of heat is generated by friction, and the large holes arranged in the inner periphery of the brake disc 1 can help quickly discharge the heat generated by brake friction, thereby improving the overall heat dissipation efficiency; on the other hand, during braking, the brake disc 1 will bear a large stress. Arranging the small holes in the outer periphery and the large holes in the inner periphery helps to optimize the stress distribution of the brake disc 1, thereby reducing stress concentration and prolonging the service life of the brake disc 1.

[0062] In one specific example, the caliper 2 is made of aluminum alloy material. (1) This material has superior mechanical properties, and its strength and hardness can be improved through cold working or heat treatment, thereby making the machining of the caliper 2 more convenient. (2) The aluminum alloy material also has excellent corrosion resistance, giving the caliper 2 more excellent durability. (3) The caliper 2 is more lightweight and has lower cost. The caliper 2 is made of aluminum alloy material, which weighs 40 to 50 grams lighter than other products made of the same material. Compared with the caliper 2 of the disc brake 100, the caliper 2 in the utility model not only maintains similar strength, but also weighs less; compared with the caliper 2 made of titanium alloy material, the aluminum alloy material caliper 2 in the utility model has lower price, and is especially suitable for being selected as the assembly of the brake system of the university student formula racing car.

[0063] The disc brake 100 of the utility model has compact structure, small radial size, and is not limited by installation environment, and can be used with the hubless transmission device of the university student formula racing car, the torsion tube and the column are arranged in the hubless transmission device, the caliper 2 is connected and fixed between the column through the connecting cantilever 25, and the torsion tube is connected and fixed with the floating pin 5. Of course, if the traditional hub transmission device is provided with a torsion tube and a column, the disc brake 100 of the utility model is also applicable to the traditional hub transmission device.

[0064] At the same time, it also has the advantages of fast oil pressure establishment speed, good durability, easy processing, light weight and low cost, and is therefore very suitable for being selected as the installation of the wheel edge part of the brake system of the university student formula racing car.

[0065] Other configurations and operations of the disc brake 100 according to the embodiments of the present application are known to those skilled in the art, and thus will not be described in detail herein. In the description of the present application, "a first feature" and "a second feature" can include one or more of the features. Among them, the up-down direction, the left-right direction and the front-rear direction are based on the up-down direction, the left-right direction and the front-rear direction shown in the drawings.

[0066] In the description of the present application, unless explicitly specified and limited, "on" or "under" of a first feature to a second feature can include that the first and the second features are in direct contact, or that the first and the second features are not in direct contact but are in contact through another feature between them. Moreover, "on", "above" and "over" of a first feature to a second feature include that the first feature is directly above and obliquely above the second feature, or only means that the first feature is horizontally higher than the second feature.

[0067] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the exemplary description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0068] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A disc brake, comprising a brake disc and a caliper, wherein the brake disc is disposed on a wheel and rotates together with it, and includes a first braking surface and a second braking surface opposite to each other; the caliper includes a first body portion disposed opposite to the first braking surface and a second body portion disposed opposite to the second braking surface, characterized in that: The caliper also includes a connecting bridge portion, wherein the first body portion and the second body portion are connected by the connecting bridge portion to straddle the brake disc; The first body portion is provided with a first brake fluid branch, and the second body portion is provided with a second brake fluid branch. The first brake fluid branch and the second brake fluid branch are connected through a third brake fluid branch provided inside the connecting bridge portion to form a brake fluid passage.

2. The disc brake according to claim 1, characterized in that, Both the first body portion and the second body portion are provided with braking components. The braking components include at least two pistons that communicate with the brake oil passages and a friction component located at the movable end of the pistons. The pistons are used to push the friction component to contact the braking surface.

3. The disc brake according to claim 2, characterized in that, The friction element includes a brake pad and a friction plate detachably mounted on the brake pad.

4. The disc brake according to claim 3, characterized in that, The first body portion and / or the second body portion are provided with a first fastening hole, and the brake pad is provided with a mounting lug; The disc brake also includes a pin for passing through the first fastening hole and the mounting lug.

5. The disc brake according to claim 1, characterized in that, The caliper is equipped with a drain bolt, which is connected to the brake oil passage and can be opened and closed.

6. The disc brake according to claim 1, characterized in that, The first body part is located between the brake disc and the wheel, and the first body part is provided with an oil inlet that connects to the brake oil passage.

7. The disc brake according to claim 1, characterized in that, Both the first body portion and the second body portion extend along the circumferential direction of the brake disc.

8. The disc brake according to claim 6 or 7, characterized in that, The caliper also includes a caliper mounting structure, which includes two connecting cantilever arms for fixing the caliper to the transmission system. The two connecting arms are respectively fixed on both sides of the first body in the extension direction, and the connecting arms are constructed as curved arms protruding from the rotation center of the brake disc.

9. The disc brake according to claim 1, characterized in that, The brake disc has several centrally symmetrical heat dissipation holes.

10. The disc brake according to claim 9, characterized in that, In a direction away from the center of the brake disc, the brake disc is provided with a first heat dissipation hole group and a second heat dissipation hole group in sequence. The first heat dissipation hole group includes a plurality of first heat dissipation holes, and the second heat dissipation hole group includes a plurality of second heat dissipation holes. The size of the first heat dissipation hole is smaller than the size of the second heat dissipation hole.

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