Hydraulic brake device

Abstract

The present invention discloses a hydraulic brake device, including two brake discs, which are arranged opposite to each other and connected to each other, a cavity is formed inside the brake disc, and the two cavities are connected to each other; a mounting groove is concavely provided on the surface of one brake disc facing the other brake disc, and the two mounting grooves are arranged opposite to each other and enclose to form a mounting space, a brake boss is convexly provided on the bottom wall of the mounting groove, and the inside of the brake boss is connected to the cavity, the two brake bosses are arranged opposite to each other, and an oil filling hole that passes through the cavity is opened on any brake disc; a brake pad, which is arranged in the mounting space and located between the two brake bosses, the protruding end of the brake boss is arranged toward the brake pad, and the surface of the brake boss facing the brake pad can approach or move away from the brake pad to lock or release the brake pad. The technical solution of the present invention aims to increase the braking force of the brake device to reduce the braking response time.

Description

Technical Field

[0001] The present invention relates to the technical field of brake equipment, and in particular to a hydraulic brake device. Background Art

[0002] Most of the existing hydraulic brake systems use closed pipes to connect hydraulic pumps. When the pressure of the master brake cylinder acts on the brake fluid, the liquid is incompressible and the pressure is transmitted to the brake slave cylinder, causing the piston in the slave cylinder to stretch to both sides under the action of the liquid pressure, pushing the brake pads and brake discs to generate braking force. This type of braking method usually has only one braking surface, and the braking force generated is relatively small, resulting in a long braking response time and failure to achieve a quick braking effect.

[0003] The above contents are only used to assist in understanding the technical solution of the present application and do not constitute an admission that the above contents are prior art. Summary of the invention

[0004] The main purpose of the present invention is to provide a hydraulic brake device, aiming to increase the braking force of the brake device to reduce the braking response time.

[0005] To achieve the above object, the hydraulic brake device proposed by the present invention comprises:

[0006] Two brake discs, the two brake discs are arranged opposite to each other and connected to each other, a cavity is formed inside the brake disc, and the two cavities are connected to each other; a mounting groove is concavely provided on the surface of one brake disc facing the other brake disc, the two mounting grooves are arranged opposite to each other and enclose a mounting space, a brake boss is convexly provided on the bottom wall of the mounting groove, the interior of the brake boss is connected to the cavity, the two brake bosses are arranged opposite to each other, and an oil filling hole that passes through the cavity is opened on any one of the brake discs;

[0007] A brake pad is arranged in the installation space and located between the two brake bosses. The protruding end of the brake boss is arranged toward the brake pad, and the surface of the brake boss facing the brake pad can approach or move away from the brake pad to lock or release the brake pad.

[0008] Optionally, a communicating hole penetrating the cavity is provided on a surface of one brake disc facing the other brake disc, and the two communicating holes are arranged opposite to each other and communicated with each other.

[0009] Optionally, the hydraulic brake device further comprises a conducting column, two ends of which are respectively inserted into the two communicating holes and communicated with the two cavities.

[0010] Optionally, the hydraulic brake device further includes a fastening screw, a threaded hole is provided on a surface of one brake disc facing away from the other brake disc, the two threaded holes are through-connected, and the fastening screw is passed through the two threaded holes to connect the two brake discs.

[0011] Optionally, the hydraulic brake device further includes a first sealing member, wherein the first sealing member abuts between a hole wall of the first threaded hole and the fastening screw.

[0012] Optionally, a surface of one brake disc facing away from the other brake disc is further provided with an escape hole connected to the cavity, and the hydraulic brake device further includes a locking member, which is inserted into the escape hole and blocks the escape hole.

[0013] Optionally, a second sealing member is provided between the locking member and the brake disc.

[0014] Optionally, the oil filling hole is arranged on the outer side wall of the brake disc.

[0015] Optionally, a plurality of the oil filling holes are provided, and the plurality of the oil filling holes are spaced apart along the circumferential direction of the brake disc, and at least one of the plurality of the oil filling holes is connected to the outside.

[0016] Optionally, the two brake discs and a brake pad disposed between the two brake discs are defined as a brake assembly, and the hydraulic brake device includes a plurality of the brake assemblies, and the plurality of the brake assemblies are stacked.

[0017] The technical solution of the present invention includes a brake pad and two brake discs. By setting two brake discs, the two brake discs can brake the brake pad at the same time to improve the braking force. Specifically, the two brake discs are arranged opposite to each other, and the cavities of the two brake discs are mutually connected. A mounting groove is concavely provided on the surface of one brake disc facing the other brake disc. The two mounting grooves are arranged opposite to each other and enclose to form a mounting space. The brake pad is arranged in the mounting space, and a brake boss is convexly provided on the bottom wall of the mounting groove. The surface of the brake boss facing the brake pad can approach or move away from the brake pad to lock or release the brake pad, and an oil filling hole that penetrates the cavity is opened on any one of the two brake discs. It can be understood that the external booster device injects oil into the brake disc through the oil filling hole to increase the pressure inside the brake disc. At this time, the brake boss in the brake disc will be deformed, that is, the surface of the brake boss facing the brake pad will approach the direction of the brake pad, causing the brake boss to apply pressure to the brake pad, while increasing the friction between the brake pad and the brake disc. Since the two brake discs are interconnected, the two brake bosses will apply pressure to the brake pad from two directions at the same time and firmly lock the brake pad, that is, the two brake discs lock the brake pad from two directions at the same time, thereby increasing the braking force and achieving the purpose of shortening the brake response time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0019] Figure 1 It is a structural schematic diagram of the present invention;

[0020] Figure 2 for Figure 1 Exploded diagram of

[0021] Figure 3 for Figure 1 A cross-sectional view of

[0022] Figure 4 1 is a schematic diagram of the structure of a brake disc;

[0023] Figure 5 It is a schematic diagram of the structure of multiple brake pads.

[0024] Description of Figure Numbers:

[0025] Label name Label name 100 Brakes 14 Connecting hole 10 Brake disc 15 Threaded Hole 11 Cavity 16 Avoidance hole 12 Brake boss 17 Locking parts 13 Oil filling hole 18 Second seal 20 Brake Pads

[0026] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0029] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text is to include three parallel solutions. Taking "A and / or B as an example", it includes solution A, or solution B, or a solution that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0031] The present invention provides a hydraulic brake device 100 .

[0032] like Figures 1 to 5 As shown, in an embodiment of the present invention, the hydraulic brake device 100 includes:

[0033] Two brake discs 10, the two brake discs 10 are arranged opposite to each other and connected to each other, a cavity 11 is formed inside the brake disc 10, and the two cavities 11 are connected to each other; a mounting groove is concavely provided on the surface of one brake disc 10 facing the other brake disc 10, the two mounting grooves are arranged opposite to each other and enclose a mounting space, a brake boss 12 is convexly provided on the bottom wall of the mounting groove, the inside of the brake boss 12 is connected to the cavity 11, the two brake bosses 12 are arranged opposite to each other, and an oil filling hole 13 that passes through the cavity 11 is opened on any one of the brake discs 10;

[0034] The brake pad 20 is arranged in the installation space and is located between the two brake bosses 12. The protruding end of the brake boss 12 is arranged toward the brake pad 20, and the surface of the brake boss 12 facing the brake pad 20 can approach or move away from the brake pad 20 to lock or release the brake pad 20.

[0035] The brake disc 10 is an annular structure and has a certain thickness, so a cavity 11 is formed inside the brake disc 10, and a through hole is provided in the middle of the brake disc 10. The brake pad 20 is an annular structure and is arranged in the installation groove. The inner edge of the brake pad 20 protrudes from the installation groove and is exposed by the through hole. The exposed part is provided with a connection hole and a heat dissipation hole. The connection hole is used to connect the external hub so that the brake pad and the wheel rotate synchronously. Since the brake pad 20 and the brake disc 10 rub against each other and generate a lot of heat, the heat dissipation hole can accelerate the heat dissipation function of the brake pad. At the same time, the brake disc 10 is set to a structure with a through middle, which can save some material costs. The two brake discs 10 are connected to each other, and the internal cavities 11 are connected to each other to form a complete cavity 11. The brake pad 20 is arranged between the two brake discs 10, and the two surfaces of the brake pad 20 are respectively attached to the surfaces of the two brake discs 10. There is a certain friction between the two brake discs 10 and the brake pad 20, which can prevent the brake pad 20 from falling off between the two brake discs 10. The surface of the brake disc 10 near the brake pad 20 is provided with a brake boss 12, the brake boss 12 and the brake disc 10 are an integral structure, the protruding end of the brake boss 12 is arranged toward the brake pad 20, that is, the brake boss 12 is higher than the surface of the brake disc 10, and the interior of the brake boss 12 is connected with the cavity 11. Under the action of external force, the brake boss 12 can make the brake boss 12 close to the surface of the brake pad 20 close to or away from the brake pad 20. When the two brake bosses 12 are close to the brake pad 20 at the same time, the two brake bosses 12 lock the brake pad 20 to make the brake pad 20 brake, and when the two brake bosses 12 are away from the brake pad 20 at the same time, the two brake bosses 12 release the brake pad 20 to achieve the purpose of releasing the brake. At the same time, the design of the present invention does not require the oil cylinder, the cylinder or other transmission device to push the brake pad 20 to brake, thereby reducing the volume of the brake system, making the space volume of the entire brake device smaller, and saving a lot of space costs.

[0036] It can be understood that the external hydraulic booster device is connected to the oil filling hole 13 of the brake disc 10 through an oil pipe, and the brake pad 20 is installed between the two brake discs 10. At this time, there is a small friction between the brake disc and the brake pad 20. When braking is to be achieved, the friction between the brake disc and the brake pad 20 needs to be increased, that is, the external hydraulic booster device injects oil into the brake disc 10 through the oil filling hole 13 to increase the pressure in the brake disc 10. At this time, the brake boss 12 in the brake disc 10 will be deformed, and the surface of the brake boss 12 close to the brake pad 20 will deviate toward the brake pad 20, so that the brake boss 12 applies pressure to the brake pad 20 and increases the friction between the brake pad 20 and the brake disc 10. Since the insides of the two brake discs 10 are interconnected, the two brake bosses 12 will simultaneously apply pressure to the brake pad 20 from two directions and firmly lock the brake disc, that is, the two brake discs 10 simultaneously lock the brake pad 20 from two directions, thereby achieving the purpose of increasing the braking force and shortening the braking response time. The existing brake system uses a cylinder to push the brake parts to brake, and the brake parts have a long stroke and a long braking time. The brake pad 20 of the present invention has a small distance from the brake boss 12 of the brake disc 10 and is in a critical locking state. When the braking action occurs, the brake parts can be quickly locked, thereby reducing the response time of the braking action and improving the response.

[0037] The technical solution of the present invention includes a brake pad 20 and two brake discs 10. By setting two brake discs 10, the two brake discs 10 can simultaneously brake the brake pad 20 to improve the braking force. Specifically, the two brake discs 10 are arranged oppositely, and the cavities 11 of the two brake discs 10 are mutually connected. A mounting groove is concavely provided on the surface of one brake disc 10 toward the surface of the other brake disc 10. The two mounting grooves are arranged oppositely and enclosed to form a mounting space. The brake pad 20 is arranged in the mounting space, and a brake boss 12 is convexly provided on the bottom wall of the mounting groove. The surface of the brake boss 12 facing the brake pad 20 can approach or move away from the brake pad, and the surface of the brake boss 12 facing the brake pad 20 can approach or move away from the brake pad 20 to lock or release the brake pad 20, and an oil filling hole 13 that passes through the cavity 11 is opened on any one of the two brake discs 10. It can be understood that the external boosting device injects oil into the brake disc 10 through the oil filling hole 13, thereby increasing the pressure in the brake disc 10, causing the brake boss 12 in the brake disc 10 to deform, that is, the surface of the brake boss 12 facing the brake pad 20 will approach the brake pad 20, prompting the brake boss 12 to apply pressure to the brake pad 20, and at the same time increasing the friction between the brake pad 20 and the brake disc 10. Since the two brake discs 10 are interconnected, the two brake bosses 12 will apply pressure to the brake pad 20 from two directions at the same time and firmly lock the brake piece, that is, the two brake discs 10 lock the brake pad 20 from two directions at the same time, thereby increasing the braking force and achieving the purpose of shortening the brake response time.

[0038] Optionally, a communication hole 14 penetrating the cavity 11 is formed on a surface of one brake disc 10 facing the other brake disc 10 , and the two communication holes 14 are arranged opposite to each other and communicate with each other.

[0039] Since the internal hydraulic pressure of the two brake discs 10 needs to be the same so that the two brake discs 10 can apply pressure to the brake pads 20 at the same time, the two brake discs 10 are provided with an oil filling hole 13 connected to the outside. Therefore, the internal cavities 11 of the two brake discs 10 need to be interconnected, that is, the present invention provides a connecting hole 14 on the opposite surfaces of the two brake discs 10, and the two connecting holes 14 are arranged opposite to each other and connected to each other, so that the internal cavities 11 of the two brake discs 10 are connected, thereby achieving the purpose of injecting oil into the two cavities 11 with only one oil filling hole 13.

[0040] When the dynamic transmission device is moving with the brake parts, if braking action is required at this time, the internal cavity 11 of the brake disc 10 will be deformed when the brake disc 10 is pressurized. Since the internal cavity 11 of the brake disc 10 brakes the brake pad 20 from two directions instead of deforming the brake parts on the dynamic transmission device, the dynamic transmission device will not be shifted in position, thereby increasing the stability of the braking system.

[0041] Furthermore, the hydraulic brake device further comprises a conducting column, two ends of which are respectively inserted into the two communicating holes 14 and communicated with the two cavities 11 .

[0042] Specifically, the two communication holes 14 are connected through a conducting column, which is a hollow structure, one end of which is plugged into one communication hole 14, and the other end is plugged into the other communication hole 14, so that the two communication holes 14 are connected to each other, that is, the internal cavities 11 of the two brake discs 10 are connected. The conducting column can be a hose or a pipe column made of the same material as the brake disc 10, as long as the two communication holes 14 can be connected.

[0043] Optionally, the hydraulic brake device further includes a fastening screw, a threaded hole 15 is provided on the surface of one brake disc 10 facing away from the other brake disc 10, the two threaded holes are through-connected, and the fastening screw is passed through the two threaded holes to connect the two brake discs 10.

[0044] The brake disc 10 is mounted on the hub. When the hub rotates, the brake disc 10 also rotates. The two brake discs 10 are arranged opposite to each other and need to achieve synchronous rotation, so the two brake discs 10 are connected to each other, that is, one brake disc 10 is connected to the hub, and the other brake disc 10 is connected to the previous brake disc 10. Specifically, the two brake discs 10 are connected by threads. The surfaces of the two brake discs 10 are respectively provided with threaded holes 15. The two threaded holes 15 are arranged opposite to each other. The fastening screws penetrate the two threaded holes 15 to achieve the connection and fixation of the two brake discs 10. The two threaded holes 15 are both arranged on the outside of the brake boss 12. The brake pad 20 is arranged in the middle of the brake disc 10, that is, the brake boss 12 is also arranged in the middle of the brake disc 10, so the two threaded holes 15 will be staggered with the brake pad 20, and the fastening screws can block the threaded holes 15.

[0045] The internal cavities 11 of the two brake discs 10 are connected, and the brake pads 20 can be locked in two directions. The friction time between the brake pads 20 and the brake bosses 12 of the brake discs 10 can be reduced, and the wear of the brake pads 20 can be reduced; the braking action does not use hard braking, but flexible braking, which will not cause the brake pads 20 to deform. In terms of design, the brake pads 20 are thicker, which increases the wear resistance; there is no need to add other materials to add friction parts between the brake discs 10 and the brake pads 20. The two brake discs 10 are made of the same material and have uniform friction, which can increase the service life of the brake pads 20; and it is easy to maintain. Since the two brake discs 10 are connected by threads, the hydraulic brake system only needs to remove the screws of the brake discs 10 and replace the brake pads 20, and no major changes are required. In this way, the service life of the brake pads 20 can be increased, the number of maintenance times can be reduced, and the utilization rate can be improved.

[0046] Optionally, the hydraulic brake device further includes a first sealing member, wherein the first sealing member abuts between a hole wall of the threaded hole and the fastening screw.

[0047] The first seal is provided on the wall of the threaded hole 15, which is mainly used to enhance the airtightness between the threaded hole and the fastening screw. Since the threaded hole 15 passes through the internal cavity 11 of the brake disc 10, in order to ensure the airtightness of the threaded hole 15, a first seal is added between the threaded hole 15 and the locking screw. Specifically, the first seal can be provided between the wall of the threaded hole and the fastening screw to increase the airtightness between the threaded hole 15 and the locking screw. The first seal can be a rubber ring or a sealing ring. The rubber ring has good elasticity, heat resistance, pressure resistance, wear resistance and certain physical and mechanical strength, and can rely on its own deformation to generate a higher initial contact stress on the sealing surface to prevent leakage of pressureless liquid.

[0048] Optionally, a surface of one brake disc 10 facing away from the other brake disc is further provided with an avoidance hole 16 connected to the cavity, and the hydraulic brake device further includes a locking member 17, which is inserted into the avoidance hole 16 and blocks the avoidance hole 16.

[0049] The avoidance hole 16 is provided because the brake disc 10 is opened during the processing for processing the brake boss 12. Therefore, in order to form hydraulic pressure inside the brake disc 10, the avoidance hole 16 needs to be blocked. Specifically, the avoidance hole is blocked from the outside by a locking member 17. The locking member 17 is inserted into the avoidance hole 16 and blocks the avoidance hole 16. The locking member 17 can be a locking screw or a rubber plug.

[0050] Optionally, a second sealing member is provided between the locking member 17 and the brake disc 10 .

[0051] The second seal is used to increase the airtightness of the avoidance hole 16. The second seal is arranged between the locking member 17 and the brake disc 10, and abuts between the locking member 17 and the brake disc 10. The second seal is an elastic member that can be elastically deformed, abuts between the locking member and the brake disc 10, and achieves an interference fit with the locking member and the brake disc 10, thereby increasing the airtightness of the avoidance opening. The second seal can be an O-type rubber ring, which has good elasticity, heat resistance, pressure resistance, wear resistance and certain physical and mechanical strength. It can rely on its own deformation to generate a higher initial contact stress on the sealing surface to prevent the leakage of pressureless liquid.

[0052] Optionally, the oil filling hole 13 is provided on the outer side wall of the brake disc 10 .

[0053] The oil injection hole 13 is connected to the internal cavity 11 of the brake disc 10, and is used for external oil injection equipment to inject oil into the cavity 11 to increase the hydraulic pressure in the cavity 11. Therefore, the oil injection hole 13 is arranged on the outer wall of the brake disc 10 to facilitate the connection with the external oil injection equipment. The size of the oil injection hole 13 should not be too large, and it only needs to be able to achieve oil injection. At the same time, the external oil injection equipment can just block the oil injection hole 13 to increase the sealing of the cavity 11.

[0054] Optionally, a plurality of the oil filling holes 13 are provided, and the plurality of the oil filling holes 13 are spaced apart along the circumferential direction of the brake disc 10 , and at least one of the plurality of the oil filling holes 13 is in communication with the outside.

[0055] Multiple oil filling holes 13 can realize free switching between manual brake locking and automatic brake locking. Specifically, when manual brake locking is required, one oil filling hole 13 needs to be opened, and the other oil filling holes 13 are closed. When automatic brake locking is to be achieved, another oil filling hole 13 needs to be opened, and the other oil filling holes 13 are closed. That is, when free switching between manual brake locking and automatic brake locking is achieved, the opening and closing of two different oil filling holes 13 are achieved. The purpose of setting multiple oil filling holes 13 here is to facilitate application in different occasions. In different occasions, the positions of the oil filling holes 13 that need to be opened are different.

[0056] In this embodiment, the two brake discs 10 and the brake pad 20 disposed between the two brake discs are defined as a brake assembly, and the hydraulic brake device includes a plurality of the brake assemblies, and the plurality of the brake assemblies are stacked.

[0057] It can be understood that the present invention is provided with multiple brake pads and multiple brake discs. Since the design structure of the present invention has a small space and a simple structure, when a greater braking force is required, multiple brake pads 20 can also be used for braking; each brake assembly is provided with a corresponding control system, so that a single brake pad 20 and multiple brake pads 20 structures can be freely switched, thereby increasing the flexibility of the braking device.

[0058] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A hydraulic brake device, characterized in that: include: Two brake discs, the two brake discs are arranged opposite to each other and connected to each other, a cavity is formed inside the brake disc, and the two cavities are connected to each other; a mounting groove is concavely provided on the surface of one brake disc facing the other brake disc, the two mounting grooves are arranged opposite to each other and enclose a mounting space, a brake boss is convexly provided on the bottom wall of the mounting groove, the interior of the brake boss is connected to the cavity, the two brake bosses are arranged opposite to each other, and an oil filling hole that passes through the cavity is opened on any one of the brake discs; A brake pad, the brake pad is arranged in the installation space and is located between the two brake bosses, the protruding end of the brake boss is arranged toward the brake pad, and the surface of the brake boss facing the brake pad can approach or move away from the brake pad to lock or release the brake pad; A communication hole penetrating the cavity is provided on a surface of one brake disc facing the other brake disc, and the two communication holes are arranged opposite to each other and communicate with each other; The hydraulic brake device further comprises a conducting column, the two ends of which are respectively inserted into the two communicating holes and communicated with the two cavities; The oil filling hole is arranged on the outer side wall of the brake disc.

2. The hydraulic brake device according to claim 1, characterized in that: The hydraulic brake device also includes a fastening screw. A threaded hole is provided on the surface of one brake disc facing away from the other brake disc. The two threaded holes are through-set. The fastening screw passes through the two threaded holes to connect the two brake discs.

3. The hydraulic brake device according to claim 2, characterized in that: The hydraulic brake device further includes a first sealing member, which is abutted between the hole wall of the threaded hole and the fastening screw.

4. The hydraulic brake device according to claim 1, characterized in that: A surface of one brake disc facing away from the other brake disc is provided with an escape hole connected to the cavity. The hydraulic brake device also includes a locking member, which is inserted into the escape hole and blocks the escape hole.

5. The hydraulic brake device according to claim 4, characterized in that: A second sealing member is arranged between the locking member and the brake disc.

6. The hydraulic brake device according to claim 1, characterized in that: There are multiple oil filling holes, and the multiple oil filling holes are arranged at intervals along the circumferential direction of the brake disc, and at least one of the multiple oil filling holes is connected to the outside.

7. The hydraulic brake device according to any one of claims 1 to 6, characterized in that: The two brake discs and the brake pad disposed between the two brake discs are defined as a brake assembly. The hydraulic brake device includes a plurality of the brake assemblies, and the plurality of the brake assemblies are stacked.

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