Brake pump for mobile mechanical braking system and driving method

Abstract

The invention discloses a brake pump for a mobile mechanical brake system and a driving method, belongs to the technical field of brake pumps, and solves the problems of insufficient brake pressure and poor brake effect of an existing brake pump. The brake pump comprises a pump body, an end cover is arranged at one end of the pump body, a power assisting assembly is movably connected to the end cover in an inserted mode, a power assisting cavity is formed between the power assisting assembly and the pump body, a pressurizing cylinder body is arranged at the other end of the pump body, and a brake assembly used for increasing oil pressure for a brake is arranged in the pump body. The braking assembly is connected with the boosting assembly through the connecting assembly, a low-pressure cavity is formed between the braking assembly and the pump body, a boosting cavity is formed between the braking assembly and the boosting cylinder body, the boosting cavity is communicated with the low-pressure cavity through a first oil duct, and a first one-way valve is arranged on the first oil duct. According to the driving method, the braking operation is more labor-saving, the braking displacement is large, the braking pressure is high, and the braking effect is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of brake pumps, and more particularly to a driving method for a brake pump on a mobile mechanical brake system. Background Art

[0002] The brake pump is a one-way acting piston hydraulic cylinder. Its function is to convert the mechanical energy input by the pedal mechanism into hydraulic energy. The brake pump generates the oil required for braking, which is transmitted to the brake through pipelines, and then brakes the machine. There is generally a certain gap between the static plate and the friction plate inside the brake. When braking, the brake piston moves forward and this gap will be eliminated. The static plate and the friction plate will come into contact, thereby braking. When braking, the gap caused by the movement of the brake piston will be filled with the oil generated by the brake pump. This requires the displacement of the brake pump to be large enough, and the braking pressure during the filling process is not required to be too high. Only when the static plate and the friction plate come into contact is a higher pressure required to achieve the desired braking effect.

[0003] After searching, the publication number is CN218505848U - a double-plunger power-assisted brake pump, which includes a plunger assembly and a power-assisted brake pump housing. The power-assisted brake pump housing is provided with a pressure oil inlet, a brake oil outlet, and an oil return port connected with its inner cavity; the plunger assembly is movably arranged in the inner cavity of the power-assisted brake pump housing, dividing the inner cavity of the power-assisted brake pump housing into a high-pressure oil chamber, an annular groove chamber, and a brake oil chamber; the plunger assembly includes a power plunger and a control plunger, and the control plunger is slidably arranged in the power plunger. Although the power-assisted structure is disclosed in the scheme and is realized during braking, in actual use, the braking pressure is insufficient, resulting in insufficient clamping force of the brake, which can easily cause brake slippage. Summary of the invention

[0004] The technical problem to be solved by the present invention is to address the above-mentioned deficiencies in the prior art. The purpose of the present invention is to provide a brake pump and a driving method for a mobile mechanical braking system. By adopting a pressurization method, the brake pump can generate a larger braking pressure, effectively improving the braking effect, and has the characteristics of strong practicality and a wide range of applications.

[0005] In order to achieve the above-mentioned purpose, the present invention provides a brake pump for a mobile mechanical braking system, comprising a pump body, an end cover is provided at one end of the pump body, a power-assisting component is movably connected to the end cover, a power-assisting chamber is provided between the power-assisting component and the pump body, a boosting cylinder is provided at the other end of the pump body, a brake component for increasing the oil pressure of the brake is provided in the pump body, the brake component is connected to the power-assisting component through a connecting component, a low-pressure chamber and a boosting chamber are respectively provided between the brake component and the pump body and the boosting cylinder, the boosting chamber and the low-pressure chamber are connected through a first oil channel, a first one-way valve is provided on the first oil channel, and a pressure relief valve for relieving the pressure of the low-pressure chamber is provided on the brake component.

[0006] As a further improvement, the pump body is provided with a power-assisting oil inlet hole, a power-assisting oil return hole, a brake oil inlet hole, and a brake oil replenishing hole. The power-assisting oil return hole is connected to the power-assisting chamber, the brake piston is arranged between the brake oil inlet hole and the brake oil replenishing hole, and the brake oil replenishing hole is connected to the low-pressure chamber.

[0007] Furthermore, the power-boosting assembly is provided with a power-boosting piston, the power-boosting piston is provided with a first sealing ring and a second sealing ring, the power-boosting piston is provided with a power-boosting piston oil inlet and a power-boosting piston oil return port, a movable plunger and a plunger return spring are provided in the power-boosting piston, a third sealing ring and a fourth sealing ring are provided on the plunger, the distance between the third sealing ring and the fourth sealing ring is equal to the distance between the power-boosting piston oil inlet and the power-boosting piston oil return port, and the plunger is provided with a power-boosting oil channel communicated with the power-boosting chamber.

[0008] Furthermore, the connecting assembly includes a spacer sleeve and a push rod, the push rod is movably plugged into the spacer sleeve, and two ends of the push rod are respectively connected to the booster piston and the brake assembly.

[0009] Furthermore, the brake assembly is provided with a brake piston, a booster piston and a return spring, wherein the return spring is arranged between the brake piston and the booster cylinder, the brake piston is arranged between the brake oil inlet and the brake oil replenishing port, and the booster piston has a smaller diameter than the brake piston.

[0010] Furthermore, a pressure relief valve core is provided in the boosting piston, a first oil passage connected to the low-pressure chamber is provided in the pressure relief valve core, a first one-way valve and a second one-way valve are provided at both ends of the first oil passage, and the first one-way valve and the second one-way valve are composed of a steel ball, a one-way valve spring, a retaining ring and a gasket.

[0011] Furthermore, a pressure relief valve spring is provided between the pressure relief valve core and the pressure boosting piston, and the pressure relief valve is composed of the pressure relief valve core and the pressure relief valve spring.

[0012] Furthermore, the pump body is provided with a positioning screw, and the positioning screw passes through the pump body and is plugged into the connecting assembly.

[0013] A driving method for a brake pump on a mobile mechanical brake system. According to the brake pump, the method is to set a power-assisting chamber, a low-pressure chamber and a boosting chamber in the brake pump, install a power-assisting assembly in the power-assisting chamber, and install a brake assembly in the low-pressure chamber. By setting a first one-way valve and a pressure relief valve in the brake assembly, the hydraulic oil in the low-pressure chamber can flow into the boosting chamber in one direction with the assistance of the power-assisting assembly, so as to achieve the purpose of quickly filling the gap. When the pressure in the boosting chamber exceeds the set pressure of the pressure relief valve, the pressure relief valve opens to relieve the pressure in the low-pressure chamber, so that the force generated by the braking operation is fully applied to the boosting piston of the boosting chamber, thereby obtaining a higher braking pressure.

[0014] Furthermore, the method comprises the following specific steps:

[0015] S1: When braking begins, the plunger moves forward, so that the booster piston oil inlet is connected to the booster chamber, the booster piston oil return port is sealed, and the booster oil enters the booster chamber through the booster oil inlet. The booster chamber pressure increases, so that the booster piston booster assembly and the plunger move forward together, and boosting begins;

[0016] S2: The booster piston pushes the brake assembly forward, at which time the pressures in the low-pressure chamber and the boost chamber increase simultaneously, and the low-pressure chamber replenishes oil to the boost chamber through the first one-way valve;

[0017] S3: When the pressure in the boost chamber rises to the pressure of the pressure relief valve, the pressure relief valve opens, the pressure in the low-pressure chamber is relieved, and the plunger continues to move forward. At this time, the force from the push rod is fully applied to the boost piston, causing the pressure in the boost chamber to continue to rise, completing the braking process.

[0018] S4: When the brake is released and the plunger is released, the booster piston, push rod and brake assembly are reset under the action of the return spring. The plunger is reset under the action of the plunger return spring, the booster piston oil inlet is sealed, the booster piston oil return port is opened, the booster chamber is connected to the booster oil return port, and the booster stops;

[0019] S5: The oil replenishes the low-pressure chamber through the second one-way valve and the brake oil replenishing port, and the oil replenishes the boost chamber through the first one-way valve to complete the reset.

[0020] Beneficial Effects

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] 1. A driving method for a brake pump on a mobile mechanical brake system of the present invention has a boosting chamber inside the brake pump, and the boosting chamber is boosted by introducing external pressure oil, so that the operator can save more effort during braking and feel more comfortable in use.

[0023] 2. A driving method for a brake pump on a mobile mechanical brake system of the present invention provides a low-pressure chamber and a boost chamber inside the brake pump. In the process of the brake piston moving to eliminate the gap, the low-pressure chamber and the boost chamber work together to achieve the purpose of quickly filling the gap, thereby obtaining a larger brake displacement in a shorter time and achieving a better braking effect.

[0024] 3. A driving method of a brake pump for a mobile mechanical brake system of the present invention is provided with a pressure relief valve in the brake pump. When the static plate contacts the friction plate, the pressure increases. The increased pressure exceeds the pressure of the brake pump pressure relief valve. The pressure relief valve opens to relieve the pressure of the low-pressure chamber, so that the force generated by the braking operation is fully applied to the boosting piston of the boosting chamber, thereby obtaining a higher braking pressure and a better braking effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 It is a schematic diagram of the cross-sectional structure of the power-assisting component of the present invention;

[0027] Figure 3 It is a schematic diagram of the cross-sectional structure of the connection assembly of the present invention;

[0028] Figure 4 It is a schematic diagram of the cross-sectional structure of the brake assembly of the present invention.

[0029] Among them: 1- pump body, 2- power assist assembly, 3- connection assembly, 4- positioning screw, 5- brake assembly, 8- boost cylinder, 9- pressure relief valve, 10- first check valve, 11- second check valve, 2.1- plunger, 2.2- power assist oil channel, 2.3- end cover, 2.5- first sealing ring, 2.6- third sealing ring, 2.7- plunger return spring, 2.8- second sealing ring, 2.9- fourth sealing ring, 2.10- power assist piston , 3.1- push rod, 3.2- spacer, 3.3- fifth sealing ring, 5.1- first oil channel, 5.2- return spring, 5.3- pressure relief valve core, 5.4- pressure relief valve spring, 5.5- boost piston, 5.6- brake piston, A- power-assisting chamber, B- low-pressure chamber, C- boost chamber, a- power-assisting oil inlet, b- power-assisting oil return port, c- brake oil inlet, d- brake oil replenishing port, e- power-assisting piston oil inlet, f- power-assisting piston oil return port. DETAILED DESCRIPTION

[0030] The present invention will be further described below with reference to the specific embodiments in the accompanying drawings.

[0031] See also Figure 1-4, which is a brake pump for a mobile mechanical brake system of the present invention, comprising a pump body 1, an end cover 2.3 is provided at one end of the pump body 1, a booster assembly 2 is movably connected to the end cover 2.3, a booster chamber A is provided between the booster assembly 2 and the pump body 1, a booster cylinder 8 is provided at the other end of the pump body 1, a brake assembly 5 for increasing the oil pressure of the brake is provided in the pump body 1, the brake assembly 5 is connected to the booster assembly 2 through a connecting assembly 3, a low-pressure chamber B and a booster chamber C are provided between the brake assembly 5 and the pump body 1 and the booster cylinder 8, the booster chamber C is connected to the low-pressure chamber B through a first oil passage 5.1, a first one-way valve 10 is provided on the first oil passage 5.1, a pressure relief valve 9 for relieving the pressure of the low-pressure chamber B is provided on the brake assembly 5, the booster chamber A is boosted by introducing external pressure oil, the booster assembly 2 is pushed by the oil pressure of the booster chamber A, the booster assembly 2 applies force to the brake assembly 5, and when the brake piston moves to eliminate the gap During the gap filling process, the oil pressure in the low-pressure chamber B flows into the boosting chamber C through the first one-way valve 10, and the low-pressure chamber B works together with the boosting chamber C to achieve the purpose of quickly filling the gap, thereby achieving the effect of labor-saving braking operation and large brake displacement, thereby obtaining a larger braking pressure and making the braking effect better. A pressure relief valve spring 5.4 is arranged between the pressure relief valve core 5.3 and the boosting piston 5.5. A pressure relief valve 9 composed of the pressure relief valve core 5.3 and the pressure relief valve spring 5.4 is provided. When the pressure relief valve 9 is working, it relieves the pressure of the low-pressure chamber B. When the static plate contacts the friction plate, the pressure increases, and the increased pressure exceeds the pressure of the pressure relief valve 9 of the brake pump. The pressure relief valve 9 opens to relieve the pressure of the low-pressure chamber B, so that the force generated by the braking operation is fully applied to the boosting piston 5.5 of the boosting chamber C, thereby obtaining a higher braking pressure, making the braking operation more labor-saving, with a large brake displacement and high brake pressure, which effectively improves the braking effect.

[0032] Furthermore, the pump body 1 is provided with a boosting oil inlet hole a, a boosting oil return hole b, a brake oil inlet hole c, and a brake oil replenishing hole d. The boosting oil return hole b is connected to the boosting chamber A, and the brake piston 5.6 is arranged between the brake oil inlet hole c and the brake oil replenishing hole d. The brake oil replenishing hole d is connected to the low-pressure chamber B.

[0033] Further, the booster assembly 2 is provided with a booster piston 2.10, on which a first sealing ring 2.5 and a second sealing ring 2.8 are provided, on which a booster piston oil inlet e and a booster piston oil return port f are provided, in which a movable plunger 2.1 and a plunger return spring 2.7 are provided, on which a third sealing ring 2.6 and a fourth sealing ring 2.9 are provided, and the distance between the third sealing ring 2.6 and the fourth sealing ring 2.9 is equal to the distance between the booster piston oil inlet e and the booster piston oil return port f, in which a booster oil passage 2.2 communicating with the booster chamber A is provided, and the booster piston 2.10 is hollow, and the lower part of the plunger 2.1 is sleeved in the booster piston 2.10, and the plunger 2.1 is provided with The third sealing ring 2.6 and the fourth sealing ring 2.9 enable the plunger 2.1 to slide left and right in the booster piston 2.10. The plunger 2.1 is provided with a plunger return spring 2.7 at the bottom, which is connected to the pump body 1 through the first sealing ring 2.5 and the second sealing ring 2.8, and can slide left and right. The booster piston 2.10 is provided with a booster piston oil inlet e and a booster piston oil return port f. When the plunger 2.1 is not pressed down, the booster piston oil inlet e is sealed, and the booster piston oil return port f connects the booster chamber A and the booster oil return port b through the oil hole inside the plunger 2.1. When the plunger 2.1 is pressed down, the booster oil return port f is sealed, and the booster oil inlet a is connected to the booster chamber A through the booster piston oil inlet e.

[0034] Furthermore, the connecting assembly 3 comprises a spacer sleeve 3.2 and a push rod 3.1, the push rod 3.1 is movably plugged into the spacer sleeve 3.2, the two ends of the push rod 3.1 are respectively connected to the booster piston 2.10 and the brake assembly 5, and a fifth sealing ring 3.3 is arranged inside the spacer sleeve 3.2, so that the push rod 3.1 can slide left and right.

[0035] Furthermore, the brake assembly 5 is provided with a brake piston 5.6, a booster piston 5.5, and a return spring 5.2. The return spring 5.2 is arranged between the brake piston 5.6 and the booster cylinder 8. The brake piston 5.6 is arranged between the brake oil inlet c and the brake oil replenishing port d. The diameter of the booster piston 5.5 is smaller than the diameter of the brake piston 5.6. The brake piston 5.6 is set to be hollow, and the booster piston 5.5 is sleeved inside. The other end of the booster piston 5.5 is placed in the booster cylinder 8, and the booster cylinder 8 is connected to the pump body 1 by fastening screws.

[0036] Furthermore, a pressure relief valve core 5.3 is provided in the boost piston 5.5, and a first oil passage 5.1 connected to the low-pressure chamber B is provided in the pressure relief valve core 5.3. A first one-way valve 10 and a second one-way valve 11 are provided at both ends of the first oil passage 5.1, respectively. The first one-way valve 10 and the second one-way valve 11 are both composed of a steel ball, a one-way valve spring, a retaining ring, and a gasket. The first one-way valve 10 allows the brake oil inlet c and the low-pressure chamber B to be unidirectionally communicated, and the low-pressure chamber B can be replenished with oil through the second one-way valve 11. The first one-way valve 10 allows the low-pressure chamber B and the boost chamber C to be unidirectionally communicated, and the boost chamber C can be replenished with oil through the first one-way valve 10.

[0037] Furthermore, a pressure relief valve spring 5.4 is provided between the pressure relief valve core 5.3 and the boosting piston 5.5, and the pressure relief valve 9 is composed of the pressure relief valve core 5.3 and the pressure relief valve spring 5.4.

[0038] Furthermore, a positioning screw 4 is provided on the pump body 1 , and the positioning screw 4 passes through the pump body 1 and is plugged into the connecting component 3 .

[0039] A driving method for a brake pump on a mobile mechanical brake system. According to the brake pump, the method is to set a boosting chamber A, a low-pressure chamber B and a boosting chamber C in the brake pump, install a boosting assembly 2 in the boosting chamber A, and install a brake assembly 5 in the low-pressure chamber B. By setting a first one-way valve 10 and a pressure relief valve 9 in the brake assembly 5, the hydraulic oil in the low-pressure chamber B can flow into the boosting chamber C in one direction under the assistance of the boosting assembly 2, so as to achieve the purpose of quickly filling the gap. When the pressure in the boosting chamber C exceeds the set pressure of the pressure relief valve 9, the pressure relief valve 9 opens to relieve the pressure in the low-pressure chamber B, so that the force generated by the braking operation is fully applied to the boosting piston 5.5 of the boosting chamber C, thereby obtaining a higher braking pressure.

[0040] Furthermore, the method comprises the following specific steps:

[0041] S1: When braking begins, the plunger 2.1 moves forward, so that the booster piston oil inlet e is connected to the booster chamber A, the booster piston oil return port f is sealed, and the booster oil enters the booster chamber A through the booster oil inlet a. The pressure in the booster chamber A increases, so that the booster piston booster assembly 2.10 moves forward together with the plunger 2.1, and boosting begins;

[0042] S2: The booster piston 2.10 pushes the brake assembly 5 forward, at which time the pressures of the low-pressure chamber B and the boost chamber C increase simultaneously, and the low-pressure chamber B replenishes oil to the boost chamber C through the first one-way valve 10;

[0043] S3: When the pressure in the boost chamber B rises to the pressure of the pressure relief valve 9, the pressure relief valve 9 opens, the pressure in the low-pressure chamber B is relieved, and the plunger 2.1 continues to move forward. At this time, the force from the push rod 3.1 fully acts on the boost piston 5.5, so that the pressure in the boost chamber C continues to rise, and the braking is completed;

[0044] S4: When the brake is released and the plunger 2.1 is released, the booster piston 2.10, the push rod 3.1 and the brake assembly 5 are reset under the action of the return spring 5.2. The plunger 2.1 is reset under the action of the plunger reset spring 2.7. The booster piston oil inlet e is sealed, the booster piston oil return port f is opened, the booster chamber A is connected to the booster oil return port b, and the booster stops.

[0045] S5: The oil replenishes the low-pressure chamber B through the second one-way valve 11 and the brake oil replenishing port d, and the oil replenishes the boosting chamber C through the first one-way valve 10, completing the reset.

[0046] The above are only preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A brake pump for a mobile mechanical brake system, characterized in that: The invention comprises a pump body (1), wherein one end of the pump body (1) is provided with an end cover (2.3), a power-assisting assembly (2) is movably connected to the end cover (2.3), a power-assisting chamber (A) is provided between the power-assisting assembly (2) and the pump body (1), a boosting cylinder (8) is provided at the other end of the pump body (1), a brake assembly (5) for increasing the oil pressure of the brake is provided in the pump body (1), the brake assembly (5) is connected to the power-assisting assembly (2) through a connecting assembly (3), a low-pressure chamber (B) and a boosting chamber (C) are provided between the brake assembly (5) and the pump body (1) and the boosting cylinder (8), respectively, the boosting chamber (C) and the low-pressure chamber (B) are connected through a first oil passage (5.1), a first one-way valve (10) is provided on the first oil passage (5.1), and a pressure relief valve (9) for relieving the pressure of the low-pressure chamber (B) is provided on the brake assembly (5).

2. A brake pump for a mobile mechanical brake system according to claim 1, characterized in that: The pump body (1) is provided with a boosting oil inlet hole (a), a boosting oil return hole (b), a brake oil inlet hole (c), and a brake oil replenishing hole (d); the boosting oil return hole (b) is connected to the boosting chamber (A); the brake piston (5.6) is arranged between the brake oil inlet hole (c) and the brake oil replenishing hole (d); and the brake oil replenishing hole (d) is connected to the low-pressure chamber (B).

3. A brake pump for a mobile mechanical brake system according to claim 1, characterized in that: The booster assembly (2) is provided with a booster piston (2.10), a first sealing ring (2.5) and a second sealing ring (2.8) are provided on the booster piston (2.10), a booster piston oil inlet (e) and a booster piston oil return port (f) are provided on the booster piston (2.10), a movable plunger (2.1) and a plunger return spring (2.7) are provided in the booster piston (2.10), a third sealing ring (2.6) and a fourth sealing ring (2.9) are provided on the plunger (2.1), the distance between the third sealing ring (2.6) and the fourth sealing ring (2.9) is equal to the distance between the booster piston oil inlet (e) and the booster piston oil return port (f), and a booster oil passage (2.2) communicating with the booster chamber (A) is provided in the plunger (2.1).

4. A brake pump for a mobile mechanical brake system according to claim 3, characterized in that: The connecting assembly (3) comprises a spacer sleeve (3.2) and a push rod (3.1), the push rod (3.1) is movably plugged into the spacer sleeve (3.2), and the two ends of the push rod (3.1) are respectively connected to the booster piston (2.10) and the brake assembly (5).

5. A brake pump for a mobile mechanical brake system according to claim 2, characterized in that: The brake assembly (5) is provided with a brake piston (5.6), a booster piston (5.5), and a return spring (5.2); the return spring (5.2) is arranged between the brake piston (5.6) and the booster cylinder (8); the brake piston (5.6) is arranged between the brake oil inlet (c) and the brake oil replenishment port (d); the diameter of the booster piston (5.5) is smaller than the diameter of the brake piston (5.6).

6. A brake pump for a mobile mechanical brake system according to claim 5, characterized in that: The booster piston (5.5) is provided with a pressure relief valve core (5.3), and the pressure relief valve core (5.3) is provided with a first oil passage (5.1) connected to a low-pressure chamber (B). A first check valve (10) and a second check valve (11) are provided at both ends of the first oil passage (5.1), and the first check valve (10) and the second check valve (11) are both composed of a steel ball, a check valve spring, a retaining ring, and a gasket.

7. A brake pump for a mobile mechanical brake system according to claim 3, characterized in that: A pressure relief valve spring (5.4) is provided between the pressure relief valve core (5.3) and the boosting piston (5.5), and the pressure relief valve (9) is composed of the pressure relief valve core (5.3) and the pressure relief valve spring (5.4).

8. The brake pump for a mobile mechanical brake system according to claim 1, characterized in that: The pump body (1) is provided with a positioning screw (4), and the positioning screw (4) passes through the pump body (1) and is plugged into the connecting component (3).

9. A method for driving a brake pump on a mobile mechanical brake system, characterized in that: According to the brake pump described in claims 1-8, the method is to set a boosting chamber (A), a low-pressure chamber (B) and a boosting chamber (C) in the brake pump, install a boosting assembly (2) in the boosting chamber (A), and install a brake assembly (5) in the low-pressure chamber (B). By setting a first one-way valve (10) and a pressure relief valve (9) in the brake assembly (5), the hydraulic oil in the low-pressure chamber (B) can flow into the boosting chamber (C) in one direction under the assistance of the boosting assembly (2), so as to achieve the purpose of quickly filling the gap. When the pressure in the boosting chamber (C) exceeds the set pressure of the pressure relief valve (9), the pressure relief valve (9) opens to relieve the pressure of the low-pressure chamber (B), so that the force generated by the braking operation is fully applied to the boosting piston (5.5) of the boosting chamber (C), thereby obtaining a higher braking pressure.

10. A method for driving a hydraulic tool handle with a combined sealing structure according to claim 9, characterized in that: The specific steps include: S1: When braking begins, the plunger (2.1) moves forward, so that the booster piston oil inlet (e) communicates with the booster chamber (A), the booster piston oil return port (f) is sealed, and the booster oil enters the booster chamber (A) through the booster oil inlet (a). The pressure in the booster chamber (A) increases, so that the booster piston booster assembly (2.10) and the plunger (2.1) move forward together, and boosting begins; S2: The booster piston (2.10) pushes the brake assembly (5) forward, at which time the pressures in the low-pressure chamber (B) and the boost chamber (C) increase simultaneously, and the low-pressure chamber (B) replenishes oil to the boost chamber (C) through the first one-way valve (10); S3: When the pressure in the boost chamber (B) rises to the pressure of the pressure relief valve (9), the pressure relief valve (9) opens, the pressure in the low-pressure chamber (B) is relieved, and the plunger (2.1) continues to move forward. At this time, the force from the push rod (3.1) fully acts on the boost piston (5.5), causing the pressure in the boost chamber (C) to continue to rise, thus completing the braking process; S4: When the brake is released and the plunger (2.1) is released, the booster piston (2.10), the push rod (3.1) and the brake assembly (5) are reset under the action of the return spring (5.2). The plunger (2.1) is reset under the action of the plunger reset spring (2.7). The booster piston oil inlet (e) is sealed, the booster piston oil return port (f) is opened, the booster chamber (A) is connected to the booster oil return port (b), and the booster stops. S5: The oil replenishes the low-pressure chamber (B) through the second one-way valve (11) and the brake oil replenishing port (d), and the oil replenishes the boosting chamber (C) through the first one-way valve (10), thereby completing the reset.

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