Brake device and vehicle

Abstract

The brake equipment comprises a brake master cylinder, a master cylinder hole is formed in the brake master cylinder, an opening is formed in one end of the master cylinder hole, a first oil hole is formed in the inner wall of the end, close to the opening, of the master cylinder hole, and a first sealing groove and a second sealing groove are formed between the first oil hole and the opening. The first sealing groove and the second sealing groove are used for installing sealing pieces so as to avoid oil leakage. According to the braking equipment and the vehicle, the risk of leakage is reduced through double sealing.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and more particularly to a braking device and a vehicle. Background Technology

[0002] Some vehicle braking systems in related technologies typically include a braking device and a brake pedal. The master cylinder of the braking device is connected to the brake pedal. When the vehicle brakes, the driver presses the brake pedal, which inputs mechanical force to the braking device. The braking device converts this mechanical force into fluid pressure, compressing the brake fluid in the master cylinder to produce a braking effect. Under the action of the braking device, the vehicle tires slow down or stop rotating, and the vehicle slows down or stops moving.

[0003] The hydraulic chamber is typically sealed to the outside to prevent brake fluid leakage. However, if the seal fails, brake fluid can leak into the environment. Summary of the Invention

[0004] To address the aforementioned problems, this application provides a braking device that uses double sealing to reduce the risk of leakage. Furthermore, this application also provides a vehicle equipped with this braking device, specifically including the following solution:

[0005] In a first aspect, this application provides a braking device, including a master cylinder. The master cylinder has a master cylinder bore with one end open. A first oil hole is provided on the inner wall of the master cylinder bore near the end of the opening. A first sealing groove and a second sealing groove are provided between the first oil hole and the opening. The first sealing groove and the second sealing groove are used to install a seal to prevent oil leakage.

[0006] The braking device of this application achieves double sealing by setting seals in the first sealing groove and the second sealing groove respectively, which effectively avoids the risk of leakage.

[0007] In one embodiment, the main cylinder bore has a second oil hole on the inner wall between the first sealing groove and the second sealing groove.

[0008] In one embodiment, the braking device further includes a hydraulic block, the hydraulic block having an oil reservoir, and the second oil hole communicating with the oil reservoir via a first oil passage located inside the hydraulic block.

[0009] In one embodiment, the braking device further includes a cover that seals over the oil reservoir.

[0010] In one embodiment, the oil reservoir and the opening are located on different sides of the hydraulic block, or the oil reservoir and the opening are located on the same side but are staggered.

[0011] In one embodiment, the oil reservoir is positioned below the opening in the vertical direction.

[0012] In one embodiment, the first oil passage includes at least one first sub-oil passage perpendicular to the axis of the main cylinder bore, or the first oil passage includes a first sub-oil passage perpendicular to the axis of the main cylinder bore and a second sub-oil passage parallel to the axis of the main cylinder bore.

[0013] In one embodiment, the master brake cylinder is at least partially formed on the hydraulic block, or the master brake cylinder passes through the hydraulic block, or the master brake cylinder and the hydraulic block are separate components.

[0014] In one embodiment, the braking device includes a push rod, a first piston, and a first spring. The push rod is adapted to connect to a brake pedal. The first piston and the first spring are respectively placed in the master cylinder bore. One end of the first piston is connected to the push rod to receive pedal thrust, and the other end is connected to the first spring to provide feedback force.

[0015] In one embodiment, the first sealing groove and the second sealing groove are respectively equipped with a first sealing element and a second sealing element, and the first sealing element and the second sealing element form a seal with the first piston.

[0016] In one embodiment, the braking device further includes an oil reservoir, the first oil hole is connected to the oil reservoir through a second oil passage, a third sealing groove is provided on the side of the first oil hole away from the opening, a third sealing element is installed in the third sealing groove, and the second sealing element, the third sealing element and the first piston form a seal against the first oil hole.

[0017] In one embodiment, the braking device further includes a second piston and a second spring, with the first spring connected between the first piston and the second piston, and the second spring connected between the second piston and the bottom wall of the master cylinder bore.

[0018] Secondly, this application also provides a vehicle that includes the braking device provided in any of the above embodiments.

[0019] It is understood that the vehicle provided in the second aspect of this application, due to the use of the braking device provided in the first aspect of this application, also possesses all the beneficial effects that may be present in the embodiments provided in the first aspect of this application. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a partial cross-sectional view of a braking device provided in one embodiment of this application;

[0022] Figure 2 This is a partial cross-sectional view of a braking device provided in one embodiment of this application;

[0023] Figure 3 This is a schematic diagram of the structure of a hydraulic block provided in one embodiment of this application.

[0024] Figure 4 This is a schematic diagram of a vehicle provided in one embodiment of this application.

[0025] Figure label:

[0026] 10. Vehicles

[0027] 100. Hydraulic block; 101. First oil circuit; 102. Oil reservoir; 103. Cover; 104. First sub-oil circuit; 105. Second sub-oil circuit;

[0028] 200. Brake master cylinder; 201. Master cylinder bore; 202. Opening; 203. First oil hole; 204. Second oil hole; 211. First sealing groove; 212. Second sealing groove; 213. Third sealing groove; 221. Push rod; 222. First spring; 223. First piston; 224. Second spring; 225. Second piston;

[0029] 301. First seal; 302. Second seal; 303. Third seal. Detailed Implementation

[0030] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings. Preferred embodiments of this application are shown in the drawings. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this application.

[0031] The following descriptions of the embodiments are based on the accompanying illustrations and are used to illustrate specific embodiments in which this application can be implemented. The component designations used herein, such as "first," "second," etc., are merely for distinguishing the described objects and do not have any sequential or technical meaning. Unless otherwise specified, the terms "connection" and "linkage" used in this application include both direct and indirect connections (linkages). Directional terms used in this application, such as "up," "down," "front," "rear," "left," "right," "inner," "outer," "side," etc., are merely for reference to the accompanying drawings. Therefore, the use of directional terms is for better and clearer explanation and understanding of this application, and does not indicate or imply that the referred device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this application.

[0032] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joint" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two elements. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising," "may include," "include," or "may include" used in this application indicate the presence of the corresponding disclosed function, operation, element, etc., and do not limit one or more other functions, operations, elements, etc. Moreover, the terms "comprising" or "include" indicate the presence of the corresponding features, number, steps, operations, elements, components, or combinations thereof disclosed in the specification, but do not exclude the presence or addition of one or more other features, number, steps, operations, elements, components, or combinations thereof, and are intended to cover non-exclusive inclusion.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application.

[0034] Understandably, the braking device of this application can be applied to, for example... Figure 4The vehicle 10 includes a pedal, a braking device, a brake, and wheels. The pedal is connected to the input end of the braking device to transmit the pedal force provided by the driver to the braking device, while the braking device provides the driver with a foot feel. The brake is connected to the output end of the braking device and fixed to the wheel end of the vehicle. The output end of the braking device may include a mechanical output end and an electronic output end. That is, the braking device of this application has both mechanical braking and electric braking functions. The brake is used to transmit the braking force or braking signal generated by the braking device to the wheels to achieve deceleration or braking. It should be noted that the vehicle 10 provided in this application can be a pure electric vehicle or a hybrid vehicle.

[0035] See Figures 1-3 In one embodiment, the braking device of this application includes a master cylinder 200. The master cylinder 200 has a master cylinder bore 201 on which a piston is movably mounted. One end of the master cylinder bore 201 is open 202, and the pedal force is transmitted to the piston through a push rod 221 on the side of the open 202. When the user operates the pedal, the piston moves, causing the piston to drive the brake fluid to generate pressure to achieve braking.

[0036] The assembly method of the brake master cylinder 200 and the hydraulic block 100 in this application can be at least any of the following: ① The brake master cylinder 200 is at least partially formed on the hydraulic block 100, or the master cylinder reuses part of the structure of the hydraulic block 100 to form the master cylinder hole 201, that is, the two are integrated; ② The brake master cylinder 200 is an independent component, which passes through a hole opened in the hydraulic block 100; ③ The brake master cylinder 200 and the hydraulic block 100 are separately arranged, and the two are connected through corresponding interfaces to achieve hydraulic circuit communication. Figure 1 and Figure 2 The diagram shows a partial structure of the first type of braking device. Figure 1 This is a schematic diagram showing the assembly of springs, pistons, seals, etc., in the master cylinder bore. Figure 2 This is a schematic diagram showing the components, such as springs, pistons, and seals, without being assembled.

[0037] It is important to understand that the opening 202 at one end of the master cylinder bore 201 in this case is not limited to only one end. Rather, it can be an opening 202 at one end, with the bottom wall of the other end integrally formed with the master cylinder, or it can be a through hole with one end opening 202 facing the push rod 221, and the other end covered or sealed by other components. Similarly, the bottom wall of the master cylinder bore 201 mentioned below can be a bottom wall integrally formed with the master cylinder, or it can be a component covering or sealing the other end of the master cylinder bore 201.

[0038] The master cylinder bore 201 has a first oil hole 203 on its inner wall near the opening 202. This first oil hole 203 can communicate with the brake fluid reservoir of the brake system to replenish the brake fluid in the master cylinder 200. Generally, a sealing groove is provided between the first oil hole 203 and the opening 202 of the master cylinder bore 201 for installing a seal to prevent oil leakage. The first oil hole 203 is generally located in an annular groove to facilitate unobstructed oil passage; this will not be discussed in detail here.

[0039] It is understandable that the seal extends radially inward beyond the corresponding sealing groove in the master cylinder bore 201 and can form a seal with the piston. Since the seal is generally made of rubber or other materials with a certain degree of elasticity, it is prone to aging after long-term use or failure after prolonged exposure to high-pressure hydraulic fluid. When the seal fails, brake fluid may leak from the opening 202 of the master cylinder bore 201 into the vehicle's interior, affecting the experience of the driver and passengers. In this embodiment, a first sealing groove 211 and a second sealing groove 212 are provided between the first oil hole 203 and the opening 202 of the master cylinder bore 201. Seals are installed within the first sealing groove 211 and the second sealing groove 212 to prevent hydraulic fluid leakage.

[0040] The braking device of this application achieves double sealing by setting seals in the first sealing groove 211 and the second sealing groove 212 respectively. If one seal fails, the other can still play a sealing role, thereby effectively avoiding the risk of leakage.

[0041] Furthermore, because there is relative displacement between the seal and the piston, rather than a fixed connection, the piston is immersed in brake fluid, and a small amount of brake fluid remains on its sidewalls during movement. The friction between the seal and the piston can transfer a small amount of brake fluid from one side to the other. Over time, the sealed space between the two seals can accumulate brake fluid, creating pressure that can cause the piston to jam and affect braking performance.

[0042] In one embodiment, the main cylinder bore 201 has a second oil hole 204 on the inner wall between the first sealing groove 211 and the second sealing groove 212. The brake fluid that has entered the space between the two seals due to friction is drained to other areas through the second oil hole 204, thereby avoiding pressure buildup that could cause seal failure or piston jamming.

[0043] It is understandable that the braking device also includes a hydraulic block 100, and the oil circuit in the hydraulic block 100 is generally connected to the middle chamber of the brake master cylinder 200 to realize the transmission of hydraulic force.

[0044] In one embodiment, an oil storage tank 102 is provided in the hydraulic block 100. By providing a first oil passage 101 in the hydraulic block 100 to connect the second oil hole 204 with the oil storage tank 102, the oil in the sealed space between the two seals can be guided to the oil storage tank 102 for storage.

[0045] Typically, the hydraulic block 100 has a polyhedral structure, such as a cuboid. Here, "polyhedral structure" refers to its general outline conforming to polyhedral characteristics. Even if parts of the structure are cut or slotted, as long as the overall structure is not affected, it should still be considered a polyhedral structure. Because the hydraulic block 100 integrates many oil passages, its layout is crucial. In one embodiment, the oil reservoir 102 and the opening 202 of the main cylinder bore 201 are located on different sides of the hydraulic block 100, or the oil reservoir 102 and the opening 202 are located on the same side but staggered, to facilitate a miniaturized design of the hydraulic block 100.

[0046] In one embodiment, in the vertical direction, the oil storage tank 102 is disposed below the opening 202 to facilitate the flow of oil into the oil storage tank 102.

[0047] Specifically, the first oil passage 101 includes at least one first sub-oil passage 104 perpendicular to the axis of the main cylinder bore 201, or the first oil passage 101 includes a first sub-oil passage 104 perpendicular to the axis of the main cylinder bore 201 and a second sub-oil passage 105 parallel to the axis of the main cylinder bore 201, connecting the second oil hole 204 and the oil reservoir 102 through the shortest path, so as to facilitate the layout design of the hydraulic block 100.

[0048] Accordingly, to prevent excessive brake fluid storage in the reservoir 102, a cover 103 can be provided on the reservoir 102. The cover 103 is placed on the reservoir 102 to seal it, and can be opened periodically to drain the brake fluid. The cover 103 and the reservoir 102 can be connected by threads or other fastening methods that facilitate disassembly and assembly.

[0049] In one embodiment, the brake master cylinder 200 can be a single-chamber master cylinder or a dual-chamber master cylinder.

[0050] As a single-chamber master cylinder, the braking device includes a push rod 221, a first piston 223, and a first spring 222. The first piston 223 forms a hydraulic chamber with the bottom wall of the master cylinder bore 201. The first spring 222 is disposed within the hydraulic chamber and its two ends are respectively connected to the first piston 223 and the bottom wall of the master cylinder bore 201. The push rod 221 is adapted to connect to the pedal to receive the pedal thrust. The first piston 223 and the first spring 222 are respectively movably disposed within the master cylinder bore 201. One end of the first piston 223 is connected to the push rod 221 to receive the pedal thrust, and the other end is connected to the first spring 222 to provide feedback force. A first sealing element 301 and a second sealing element 302 are respectively installed in the first sealing groove 211 and the second sealing groove 212. The first sealing element 301 and the second sealing element 302 form a double seal with the first piston 223. If one of the seals fails, the other can still perform the sealing function, thereby effectively avoiding the risk of leakage.

[0051] As a dual-chamber master cylinder, the braking device also includes a second piston 225 and a second spring 224. The first piston 223 and the second piston 225 form a first hydraulic chamber, and the second piston 225 and the bottom wall of the master cylinder bore 201 form a second hydraulic chamber. The first spring 222 is disposed in the first hydraulic chamber and connected between the first piston 223 and the second piston 225. The second spring 224 is connected between the second piston 225 and the bottom wall of the master cylinder bore 201.

[0052] In addition, the braking device also includes an oil reservoir. The first oil hole 203 is connected to the oil reservoir through the second oil passage. A third sealing groove 213 is provided on the side of the first oil hole 203 away from the opening 202. A third sealing element 303 is installed in the third sealing groove 213. The second sealing element 302, the third sealing element 303 and the first piston 223 form a seal on the first oil hole 203.

[0053] In some embodiments, a third oil passage is also formed in the hydraulic block 100, which connects the oil reservoir and the wheel cylinder for recovering brake fluid from the wheel cylinder. The aforementioned first oil passage 101 can be connected to the third oil passage to simultaneously recover accumulated brake fluid. Based on this, a check valve can be provided on the first oil passage 101 to prevent oil from flowing back into the master cylinder.

[0054] It should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of embodiments of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0055] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0056] It should be understood that the application of this application is not limited to the examples above. Those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims. Those skilled in the art will understand that implementing all or part of the processes of the above embodiments, and making equivalent changes according to the claims of this application, still falls within the scope of this application.

Claims

1. A braking device, characterized in that, The system includes a master cylinder (200), which has a master cylinder bore (201) with an opening (202) at one end. A first oil hole (203) is provided on the inner wall of the master cylinder bore (201) near the opening (202). A first sealing groove (211) and a second sealing groove (212) are provided between the first oil hole (203) and the opening (202). The first sealing groove (211) and the second sealing groove (212) are used to install seals to prevent oil leakage.

2. The braking device according to claim 1, characterized in that, The main cylinder bore (201) has a second oil hole (204) on the inner wall between the first sealing groove (211) and the second sealing groove (212).

3. The braking device according to claim 2, characterized in that, The braking device also includes a hydraulic block (100), which has an oil reservoir (102). The second oil hole (204) is connected to the oil reservoir (102) through a first oil passage (101), which is located inside the hydraulic block (100).

4. The braking device according to claim 3, characterized in that, The braking device also includes a cover (103) which is sealed over the oil reservoir (102).

5. The braking device according to claim 3, characterized in that, The oil reservoir (102) and the opening (202) are located on different sides of the hydraulic block (100), or the oil reservoir (102) and the opening (202) are located on the same side but staggered.

6. The braking device according to claim 3, characterized in that, In the vertical direction, the oil storage tank (102) is located below the opening (202).

7. The braking device according to claim 3, characterized in that, The first oil passage (101) includes at least one first sub-oil passage (104) perpendicular to the axis of the main cylinder bore (201), or the first oil passage (101) includes a first sub-oil passage (104) perpendicular to the axis of the main cylinder bore (201) and a second sub-oil passage (105) parallel to the axis of the main cylinder bore (201).

8. The braking device according to claim 3, characterized in that, The master brake cylinder (200) is at least partially formed on the hydraulic block (100), or the master brake cylinder (200) passes through the hydraulic block (100), or the master brake cylinder (200) and the hydraulic block (100) are separately disposed.

9. The braking device according to any one of claims 1-8, characterized in that, The braking device includes a push rod (221), a first piston (223), and a first spring (222). The push rod (221) is adapted to connect to the brake pedal. The first piston (223) and the first spring (222) are respectively placed in the master cylinder bore (201). One end of the first piston (223) is connected to the push rod (221) to receive the pedal thrust, and the other end is connected to the first spring (222) to provide feedback force.

10. The braking device according to claim 9, characterized in that, The first sealing groove (211) and the second sealing groove (212) are respectively equipped with a first sealing element (301) and a second sealing element (302), and the first sealing element (301) and the second sealing element (302) form a seal with the first piston (223).

11. The braking device according to claim 10, characterized in that, The braking device also includes an oil reservoir. The first oil hole (203) is connected to the oil reservoir through a second oil passage. A third sealing groove (213) is provided on the side of the first oil hole (203) away from the opening (202). A third sealing element (303) is installed in the third sealing groove (213). The second sealing element (302), the third sealing element (303), and the first piston (223) form a seal on the first oil hole (203).

12. The braking device according to claim 11, characterized in that, The braking device further includes a second piston (225) and a second spring (224), wherein the first spring (222) is connected between the first piston (223) and the second piston (225), and the second spring (224) is connected between the second piston (225) and the bottom wall of the master cylinder bore (201).

13. A vehicle (10), characterized in that, Includes the braking device as described in any one of claims 1-12.

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