High-pressure-resistant quick-charging type hydraulic brake master cylinder

Abstract

The invention relates to the technical field of hydraulic brake systems, in particular to a high-pressure-resistant quick-charging type hydraulic brake master cylinder. An oil outlet hole is formed in one end of a brake cavity, a cylinder opening hole allowing a brake plate to stretch into is formed in the other end of the brake cavity, and an oil inlet loop and a compensation loop are arranged on one side of a cylinder body; the oil inlet loop and the compensation loop are both communicated with the brake cavity and are both used for inputting hydraulic oil into the brake cavity, a compensation channel is further communicated between the oil inlet loop and the compensation loop, and a device assembly used for communicating or blocking the compensation channel is installed in the compensation loop. According to the brake master cylinder, the independent compensation loop is further communicated between the oil inlet loop and the brake cavity, the compensation loop is communicated or blocked through the device assembly, the sealing form of a traditional brake master cylinder is improved through the device assembly, high pressure can be borne, and the service life of the brake master cylinder is prolonged. And the high pressure resistance and the fatigue resistance of the brake system are improved.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic brake systems, and in particular to a high-pressure fast-filling hydraulic brake master cylinder. Background Art

[0002] The brake master cylinder is a one-way piston hydraulic cylinder. Its function is to convert the mechanical energy input by the pedal mechanism into hydraulic energy. The brake master cylinder is the main brake component in the automobile hydraulic brake system. The brake fluid output by it is input into the brake wheel cylinder on the brake disc through the oil outlet and the brake pipeline, thereby achieving the purpose of automobile braking.

[0003] like Figure 1 As shown, the conventional hydraulic brake master cylinder is composed of a conventional cylinder body 101, a conventional piston assembly 102, a conventional master cup 103 and other accessories. Although the conventional brake master cylinder is still in use today, it has certain limitations, and only relies on the master cup for compensation and sealing, and has the disadvantages of insufficient high pressure resistance and fatigue resistance. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings and deficiencies of the prior art and to provide a high-pressure resistant and fast-filling hydraulic brake master cylinder. The present invention also has an independent compensation circuit connected between the oil inlet circuit and the brake chamber, and the compensation circuit is connected or blocked by a device component. The device component improves the sealing form of the traditional brake master cylinder, can withstand higher pressure, and improves the high-pressure resistance and fatigue resistance of the braking system.

[0005] The technical solution adopted by the present invention is as follows: A high-pressure fast-filling resistant hydraulic brake master cylinder comprises a cylinder body, a piston assembly, a return spring and a brake plate, a brake chamber is arranged in the cylinder body, the brake plate drives the piston assembly to slide in the brake chamber, the return spring is installed between the end of the piston assembly away from the brake plate and the inner wall of the brake chamber, one end of the brake chamber is provided with an oil outlet hole and the other end is provided with a cylinder mouth hole for the brake plate to extend into, an oil inlet circuit and a compensation circuit are provided on one side of the cylinder body, the oil inlet circuit and the compensation circuit are both connected to the brake chamber, the oil inlet circuit and the compensation circuit are both used to input hydraulic oil into the brake chamber, a compensation channel is also connected between the oil inlet circuit and the compensation circuit, a device component for connecting or blocking the compensation channel is installed in the compensation circuit, and the compensation circuit is located at one end of the cylinder body close to the oil outlet hole relative to the oil inlet circuit.

[0006] The device assembly includes a valve stem and a valve spring. The valve stem is slidably arranged in the compensation circuit through the valve spring and is sealed with the compensation channel. The valve stem extends into the compensation channel, and the diameter of one end of the valve stem extending into the compensation channel is smaller than the diameter of the other end away from the compensation channel.

[0007] The device assembly also includes a valve sealing ring, which is sleeved on an end of the valve stem away from the compensation channel, and the valve stem is sealed and matched with the compensation channel through the valve sealing ring.

[0008] The device assembly also includes a plug, one side of the compensation circuit is provided with an opening connected to the outside of the cylinder body, the plug is threadedly connected to the opening, an O-ring is also provided between the plug and the opening, one end of the valve spring abuts against the plug and the other end abuts against the valve sealing ring.

[0009] The compensation circuit is also equipped with a quick-discharge component in communication.

[0010] The oil inlet circuit includes an oil inlet hole and an oil return hole both connected to the brake chamber. The oil return hole is located at one end of the cylinder body close to the oil outlet hole relative to the oil inlet hole. A fast filling valve assembly is installed in the oil inlet circuit, and the fast filling valve assembly is used to connect to the oil storage tank.

[0011] The fast filling valve assembly includes a valve body and a ball core assembly. One end of the fast filling valve assembly is provided with an oil storage channel, and the valve body is provided with an oil passage. One end of the oil passage is connected to the oil storage channel and the other end is connected to the oil inlet circuit. The ball core assembly is arranged between the oil storage channel and the valve body and cooperates with the valve body to seal and connect or block the oil passage.

[0012] A liquid storage chamber with an inner diameter larger than that of the brake chamber is provided at one end of the cylinder body close to the cylinder port hole. The liquid storage chamber is communicated with the oil inlet hole, and the liquid storage chamber and the brake chamber are separated by a piston assembly.

[0013] A boss is extended circumferentially at one end of the piston assembly near the oil outlet, one end of the return spring abuts against the inner wall of the brake chamber and the other end abuts against the boss, a first leather cup is installed on the piston assembly, and the first leather cup is located on the side of the boss away from the return spring.

[0014] A second leather cup is installed on the piston assembly at a position corresponding to the liquid storage chamber.

[0015] The beneficial effects of the present invention are as follows: the present invention also has an independent compensation circuit connected between the oil inlet circuit and the brake chamber. The compensation circuit cooperates with the oil inlet circuit to simultaneously input hydraulic oil, thereby adjusting the flow of the input hydraulic oil to the brake chamber. The compensation circuit is connected or blocked by a device component. The device component is a flat seal, which improves the sealing form of the traditional brake master cylinder, can withstand higher pressure, and improves the high pressure resistance and fatigue resistance of the brake system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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, without paying creative labor, other drawings obtained based on these drawings still belong to the scope of the present invention.

[0017] Figure 1 It is a structural schematic diagram of a conventional brake master cylinder in the prior art; Figure 2 It is a structural schematic diagram of the present invention; Figure 3 for Figure 2 A schematic diagram of the local enlarged structure at point A in the middle; Figure 4 for Figure 2 A schematic diagram of the local enlarged structure at B in the middle; In the figure, 1-cylinder body, 2-piston assembly, 3-return spring, 4-brake plate, 5-brake chamber, 6-oil outlet hole, 7-cylinder port hole, 8-oil inlet circuit, 9-compensation circuit, 10-compensation channel, 11-valve stem, 12-valve sealing ring, 13-valve spring, 15-plug, 16-opening, 17-O-ring, 18-quick exhaust assembly, 19-oil inlet hole, 20-oil return hole, 21-fast filling valve assembly, 22-valve body, 24-ball core assembly, 25-oil storage channel, 26-oil passage, 27-liquid storage chamber, 28-boss, 29-first leather cup, 30-second leather cup, 101-traditional cylinder body, 102-traditional piston assembly, 103-traditional main leather cup. DETAILED DESCRIPTION

[0018] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings.

[0019] It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are for distinguishing two non-identical entities with the same name or non-identical parameters. It can be seen that "first" and "second" are only for the convenience of expression and should not be understood as limitations on the embodiments of the present invention. The subsequent embodiments will not explain this one by one.

[0020] The directions and positions mentioned in the present invention, such as "upper", "lower", "front", "back", "left", "right", "inside", "outside", "top", "bottom", "side", etc., are only for reference to the directions or positions of the drawings. Therefore, the directions and positions used are for explaining and understanding the present invention, but not for limiting the scope of protection of the present invention.

[0021] like Figures 2 to 4As shown, an embodiment of the present invention is a high-pressure fast-filling hydraulic brake master cylinder, comprising a cylinder body 1, a piston assembly 2, a return spring 3 and a brake plate 4, wherein a brake chamber 5 is provided in the cylinder body 1, and the brake plate 4 drives the piston assembly 2 to slide in the brake chamber 5, and the return spring 3 is installed between the end of the piston assembly 2 away from the brake plate 4 and the inner wall of the brake chamber 5, and an oil outlet hole 6 is provided at one end of the brake chamber 5 and a cylinder mouth hole 7 for the brake plate 4 to extend into is provided at the other end, and an oil inlet circuit 8 and a compensation circuit 9 are provided on one side of the cylinder body 1, and the oil inlet circuit 8 and the compensation circuit 9 are both connected to the brake chamber 5, and the oil inlet circuit 8 and the compensation circuit 9 are both used to input hydraulic oil into the brake chamber 5, and a compensation channel 10 is also connected between the oil inlet circuit 8 and the compensation circuit 9, and a device component for connecting or blocking the compensation channel 10 is installed in the compensation circuit 9, and the compensation circuit 9 is located at one end of the cylinder body 1 near the oil outlet hole 6 relative to the oil inlet circuit 8.

[0022] The beneficial effects of such a configuration are as follows: the present invention further has an independent compensation circuit connected between the oil inlet circuit and the brake chamber, the compensation circuit cooperates with the oil inlet circuit to simultaneously input hydraulic oil, and then adjusts the flow of the hydraulic oil input to the brake chamber, and connects or blocks the compensation circuit through the device component, the device component is a plane seal, which improves the sealing form of the traditional brake master cylinder, can withstand higher pressure, and improves the high pressure resistance and fatigue resistance of the brake system. The brake plate is driven by the pedal to move the piston assembly into the cylinder body, and at the same time, the oil inlet circuit and the compensation circuit simultaneously input hydraulic oil into the brake chamber. When the piston assembly moves to cross the oil inlet circuit, the pressure in the brake chamber will continue to increase. When the pressure in the brake chamber reaches a certain pressure value, the device component is closed, and the brake chamber forms a closed cavity. The piston assembly continues to move under the action of the brake plate, so that high pressure is established in the brake chamber, and then the hydraulic pressure is transmitted to each brake wheel cylinder through the transmission of hydraulic oil, so that the wheel is decelerated to stop, and the vehicle is braked.

[0023] It is further configured that the device assembly includes a valve stem 11 and a valve spring 13, the valve stem 11 is slidably arranged in the compensation circuit 9 through the valve spring 13 and is sealed with the compensation channel 10, the valve stem 11 extends into the compensation channel 10, and the diameter of one end of the valve stem 11 extending into the compensation channel 10 is smaller than the diameter of the other end away from the compensation channel 10.

[0024] The beneficial effects of such a setting are as follows: the valve stem is squeezed toward the compensation channel under the action of the valve spring. When the pressure in the compensation circuit is greater than that in the compensation channel, the valve stem and the compensation channel maintain a sealed fit. The structure of the valve stem and the valve spring is a flat seal with good high pressure resistance and the characteristics of fast opening and fast closing. The thinner structure at one end of the valve stem extending into the compensation channel can open and close the compensation channel faster, and can also adjust the flow of hydraulic oil. It has the advantages of good sensitivity and fast response speed, ensuring the stable and reliable compensation function of the braking system and the smooth circulation of the hydraulic oil, ensuring that the braking system maintains stable and efficient operation during braking, is safe and reliable, and not only solves the problems of instability and slow response speed of the braking system during braking, but also improves the service life of the brake master cylinder.

[0025] It is further configured that the device assembly also includes a valve sealing ring 12 , which is sleeved on an end of the valve stem 11 away from the compensation channel 10 , and the valve stem 11 is sealed and matched with the compensation channel 10 through the valve sealing ring 12 .

[0026] The beneficial effects of such an arrangement are as follows: elastic sealing is achieved through the valve sealing ring, further improving the sealing performance of the valve stem.

[0027] It is further configured that the device assembly also includes a plug 15, an opening 16 connected to the outside of the cylinder body 1 is opened on one side of the compensation circuit 9, the plug 15 is threadedly connected to the opening 16 via a thread, and an O-ring 17 is also provided between the plug 15 and the opening 16, one end of the valve spring 13 abuts against the plug 15 and the other end abuts against the valve sealing ring 12.

[0028] The beneficial effects of such a configuration are as follows: the detachable plug facilitates the repair and replacement of the device components, has a quick-release effect, and can also facilitate the adjustment of the compression amount of the valve spring to ensure the normal operation of the device components.

[0029] It is further provided that the compensation circuit 9 is also provided with a quick discharge component 18 in communication therewith.

[0030] The beneficial effect of such an arrangement is as follows: the compensation circuit is quickly depressurized through the quick exhaust assembly.

[0031] It is further configured that the oil inlet circuit 8 includes an oil inlet hole 19 and an oil return hole 20 both connected to the brake chamber 5. The oil return hole 20 is located at one end of the cylinder body 1 close to the oil outlet hole 6 relative to the oil inlet hole 19. A fast filling valve assembly 21 is installed in the oil inlet circuit 8, and the fast filling valve assembly 21 is used to connect to the oil storage tank.

[0032] The beneficial effects of this arrangement are as follows: the hydraulic oil quickly enters the brake chamber under the action of the fast filling valve assembly, greatly improving the emptying performance. When the force of the pedal is removed, the piston assembly returns to the initial position under the elastic force of the return spring, the brake fluid flows back through the oil return hole, and the brake is released.

[0033] It is further configured that the fast filling valve assembly 21 includes a valve body 22 and a ball core assembly 24, one end of the fast filling valve assembly 21 is provided with an oil storage channel 25, the valve body 22 is provided with an oil passage 26, one end of the oil passage 26 is connected to the oil storage channel 25 and the other end is connected to the oil inlet circuit 8, the ball core assembly 24 is arranged between the oil storage channel 25 and the valve body 22 and is sealed with the valve body 22 to connect or block the oil passage 26.

[0034] The beneficial effects of such an arrangement are as follows: the ball core assembly cooperates with the valve body to have a sensitive opening and closing structure, which facilitates the outflow and backflow of hydraulic oil.

[0035] It is further configured that a liquid storage chamber 27 having an inner diameter larger than that of the brake chamber 5 is provided at one end of the cylinder body 1 near the cylinder port hole 7 , the liquid storage chamber 27 is communicated with the oil inlet hole 19 , and the liquid storage chamber 27 and the brake chamber 5 are separated by the piston assembly 2 .

[0036] The beneficial effects of this arrangement are as follows: the oil inlet hole is connected to the liquid storage chamber, which helps store hydraulic oil. When the piston assembly retracts, the hydraulic oil in the brake chamber can be quickly discharged, and the vacuum sealing performance of the brake master cylinder can reach the specified value.

[0037] It is further configured that a boss 28 extends circumferentially at one end of the piston assembly 2 near the oil outlet hole 6, one end of the return spring 3 abuts against the inner wall of the brake chamber 5 and the other end abuts against the boss 28, and a first leather cup 29 is installed on the piston assembly 2, and the first leather cup 29 is located on the side of the boss 28 away from the return spring 3.

[0038] The beneficial effects of this arrangement are as follows: the traditional main leather cup will be deformed due to high pressure. The first leather cup adopts the structure of a secondary leather cup, and the secondary leather cup is used instead of the main leather cup. The first leather cup improves the high pressure resistance and fatigue resistance of the brake master cylinder and extends the service life of the brake system.

[0039] It is further provided that a second leather cup 30 is installed at a position on the piston assembly 2 corresponding to the liquid storage chamber 27 .

[0040] The beneficial effects of such a setting are as follows: the second leather cup also adopts a secondary leather cup structure, which further improves the high pressure resistance and fatigue resistance of the brake master cylinder.

[0041] The above disclosure is only the preferred embodiment of the present invention, which certainly cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope of the present invention.

Claims

1. A high-pressure fast-filling hydraulic brake master cylinder, comprising a cylinder body (1), a piston assembly (2), a return spring (3) and a brake plate (4), wherein a brake chamber (5) is provided in the cylinder body (1), the brake plate (4) drives the piston assembly (2) to slide in the brake chamber (5), and the return spring (3) is installed between an end of the piston assembly (2) away from the brake plate (4) and an inner wall of the brake chamber (5), characterized in that: An oil outlet hole (6) is formed at one end of the brake chamber (5), and a cylinder port hole (7) for the brake plate (4) to extend into is formed at the other end. An oil inlet circuit (8) and a compensation circuit (9) are formed on one side of the cylinder body (1). The oil inlet circuit (8) and the compensation circuit (9) are both connected to the brake chamber (5). The oil inlet circuit (8) and the compensation circuit (9) are both used to input hydraulic oil into the brake chamber (5). A compensation channel (10) is also connected between the oil inlet circuit (8) and the compensation circuit (9). A device component for connecting or blocking the compensation channel (10) is installed in the compensation circuit (9). The compensation circuit (9) is located at one end of the cylinder body (1) close to the oil outlet hole (6) relative to the oil inlet circuit (8).

2. The high-pressure fast-filling hydraulic brake master cylinder according to claim 1, characterized in that: The device assembly comprises a valve stem (11) and a valve spring (13); the valve stem (11) is slidably arranged in the compensation circuit (9) via the valve spring (13) and is sealed with the compensation channel (10); the valve stem (11) extends into the compensation channel (10); and the diameter of one end of the valve stem (11) extending into the compensation channel (10) is smaller than the diameter of the other end away from the compensation channel (10).

3. The high-pressure fast-filling hydraulic brake master cylinder according to claim 2, characterized in that: The device assembly further comprises a valve sealing ring (12), wherein the valve sealing ring (12) is sleeved on an end of the valve stem (11) away from the compensation channel (10), and the valve stem (11) is sealed and matched with the compensation channel (10) via the valve sealing ring (12).

4. The high-pressure fast-filling hydraulic brake master cylinder according to claim 3, characterized in that: The device assembly further comprises a plug (15); one side of the compensation circuit (9) is provided with an opening (16) which is in communication with the outside of the cylinder body (1); the plug (15) is threadedly connected to the opening (16) via a thread; an O-ring (17) is further provided between the plug (15) and the opening (16); one end of the valve spring (13) abuts against the plug (15) and the other end abuts against the valve sealing ring (12).

5. The high-pressure fast-filling hydraulic brake master cylinder according to claim 1, characterized in that: The compensation circuit (9) is also equipped with a quick-discharge component (18) in communication with the quick-discharge component.

6. The high-pressure fast-filling hydraulic brake master cylinder according to claim 1, characterized in that: The oil inlet circuit (8) comprises an oil inlet hole (19) and an oil return hole (20) both of which are connected to the brake chamber (5); the oil return hole (20) is located at one end of the cylinder body (1) close to the oil outlet hole (6) relative to the oil inlet hole (19); a fast filling valve assembly (21) is installed in the oil inlet circuit (8); the fast filling valve assembly (21) is used to connect to the oil storage tank.

7. The high-pressure fast-filling hydraulic brake master cylinder according to claim 6, characterized in that: The fast filling valve assembly (21) comprises a valve body (22) and a ball core assembly (24); one end of the fast filling valve assembly (21) is provided with an oil storage channel (25); the valve body (22) is provided with an oil passage channel (26); one end of the oil passage channel (26) is connected to the oil storage channel (25) and the other end is connected to the oil inlet circuit (8); the ball core assembly (24) is arranged between the oil storage channel (25) and the valve body (22) and is in sealing cooperation with the valve body (22) to communicate with or block the oil passage channel (26).

8. The high-pressure fast-filling hydraulic brake master cylinder according to claim 6, characterized in that: A liquid storage chamber (27) having an inner diameter greater than that of the brake chamber (5) is provided at one end of the cylinder body (1) near the cylinder port hole (7); the liquid storage chamber (27) is communicated with the oil inlet hole (19); and the liquid storage chamber (27) and the brake chamber (5) are separated by a piston assembly (2).

9. The high-pressure fast-filling hydraulic brake master cylinder according to claim 1, characterized in that: One end of the piston assembly (2) close to the oil outlet hole (6) is provided with a boss (28) extending in the circumferential direction; one end of the return spring (3) abuts against the inner wall of the brake chamber (5) and the other end abuts against the boss (28); a first leather cup (29) is mounted on the piston assembly (2); the first leather cup (29) is located on a side of the boss (28) away from the return spring (3).

10. The high-pressure fast-filling hydraulic brake master cylinder according to claim 8, characterized in that: A second leather cup (30) is installed on the piston assembly (2) at a position corresponding to the liquid storage chamber (27).

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