Air-boosted brake pump

Abstract

The application relates to an air-pressurized brake pump which comprises a brake pump body, the brake pump body comprises a shell, a closed end cover, an outer shell and a storage bin, a cylinder hole is arranged in the shell, a plurality of inner grooves are arranged in the cylinder hole, a first flow resistance sealing ring and a plurality of second flow resistance sealing rings are respectively embedded, trapezoidal grooves are arranged on the sealing rings, adaptive sealing with the increase of air pressure is realized by cooperating with a piston, the piston is connected with a driving block through a guide column, the driving block is externally provided with a sealing ring and can axially move in a second cylinder chamber in the outer shell, simultaneously driving the piston to move and enhancing the output air pressure. The closed end cover is screwed with the shell, the outer shell is connected with the closed end cover through a through hole and a fixing screw to form an integral whole. The storage bin is fixed on the shell through a connecting screw, is internally provided with a filter element, a sealing gasket and an upper cover, constitutes a filtering assembly and is communicated with an air path of the cylinder hole. The brake pump body is further provided with a support for installation and fixation. The application has the effects of compact structure, strong sealing property and fast air pressure response.

Description

Technical Field

[0001] This application relates to the field of vehicle braking systems, and more particularly to an air-pressurized brake pump. Background Technology

[0002] In the existing technology, booster brake pumps, as key actuators in the braking system of loaders, are widely used in equipment such as power machinery, automobiles, and engineering vehicles. Traditional booster brake pumps mostly adopt simple pneumatic structures, which can achieve the function of pneumatic booster auxiliary braking, but still have many shortcomings in terms of airtightness, structural compactness, and energy utilization efficiency.

[0003] While conventional booster brake pumps offer a certain degree of transmission rigidity and precision, their complex structure, high maintenance costs, and inherent leakage risks make them problematic. Pneumatic booster brake pumps, while simpler in their sealing and internal transmission designs, suffer from insufficient sealing between the seals and piston, leading to gas leakage, insufficient air pressure, and a shorter lifespan, thus impacting braking performance and safety. Furthermore, existing products often exhibit weak connections between the piston and drive block, making them susceptible to displacement deviations under vibration. This affects the accuracy of piston stroke control and consequently, the stability of output pressure. In addition, some pneumatic brake pumps lack effective filtration devices, allowing impurities from the compressed air to enter the cylinder, causing internal wear, jamming, performance degradation, and a shortened lifespan.

[0004] Therefore, there is an urgent need to provide an air-boosting brake pump with a reasonable structural design, good sealing effect, fast response and air filtration function to solve the above technical problems and improve the overall performance and reliability of the braking system. Utility Model Content

[0005] To improve the problems of poor sealing and short service life of booster brake pumps, this application provides an air-boosted brake pump.

[0006] This application provides a technical solution using the following approach:

[0007] An air-pressurized brake pump includes a brake pump body, the brake pump body including a housing, one end of the housing being connected to a closed end cap, the other end of the closed end cap being fixedly connected to an outer shell, the upper end of the housing being connected to a storage compartment, and the inner cavity of the storage compartment being connected to the air passage of the inner cavity of the housing.

[0008] The housing has a cylinder bore, and the cylinder bore has an inner groove 1. The inner groove 1 has several inner grooves 2 on the side facing the cylinder bore opening. The inner groove 1 has a first flow-blocking sealing ring, and each of the inner grooves 2 has a second flow-blocking sealing ring. The first flow-blocking sealing ring and the second flow-blocking sealing ring each have a trapezoidal groove on one side, and the opening of the trapezoidal groove faces the cylinder bore opening.

[0009] The brake pump body includes a piston, which is installed in the cylinder bore. The inner circumferential walls of the first and second flow-blocking sealing rings are flexibly wrapped and connected to the outer diameter of the piston. When the piston moves axially toward the output screw hole at the tail of the cylinder bore, the pressurized gas radially presses the trapezoidal groove toward one side of the piston, so that the inner wall of the trapezoidal groove is further flexibly fitted with the piston to improve the sealing performance.

[0010] By adopting the above technical solution, a fully sealed pneumatic working chamber is formed through the structural combination of the housing, closed end cap, outer shell, and storage compartment. This achieves stable gas introduction and sealing, ensuring the integrity of the brake pump system and the continuity of air pressure transmission. The cylinder bore inside the housing provides precise guidance and a working channel for the piston, ensuring that the piston can move smoothly axially under air pressure.

[0011] Secondly, a multi-stage sealing structure is designed within the cylinder bore, including a first flow-blocking sealing ring and several second flow-blocking sealing rings, with trapezoidal grooves facing the piston end on the surface of each sealing ring. During piston movement, this structure causes the trapezoidal grooves to deform under pressure, and the inner wall of the groove radially presses against the outer wall of the piston, achieving dynamic adaptive fitting. This effectively improves the sealing effect, prevents gas leakage, and enhances the cylinder's ability to maintain pressure. The flow-blocking sealing rings are connected to the piston using a flexible wrapping method, which not only improves the wear resistance and service life of the sealing rings but also ensures that the piston maintains good airtightness during reciprocating motion within the cylinder, thereby improving the overall brake pump's response speed and the stability of braking force output.

[0012] Optionally, the housing is provided with an external thread on the side facing the cylinder bore, and the external thread is screwed into the connecting screw hole of the closed end cover. A first nut is provided on the other side of the closed end cover and screwed into the external thread to lock the closed end cover.

[0013] Optionally, the housing has a main body, and the main body has an outwardly extending connecting end at one circumference. The connecting end has a connecting screw hole inside, and the bottom side of the connecting screw hole has an air passage that connects the connecting screw hole and the cylinder bore.

[0014] Optionally, the closed end cover is provided with an end cover body, a connection port is provided on one side of the end cover body, and a plurality of fixed ends are evenly distributed axially on the other side of the connection port, and each fixed end is provided with two through screw holes.

[0015] Optionally, the piston is provided with a piston body, one end of the piston body is provided with a guide post, one end of the guide post is provided with a fixing thread, and the guide post is connected to the connecting hole of the drive block;

[0016] The drive block has a fourth inner groove on its outer circumference, and a sealing ring is embedded in the fourth inner groove. The drive block has an inner concave hole, and a connecting hole is provided at the bottom of the inner concave hole. After the guide post is connected to the connecting hole, the fixing thread extends out of the other end of the connecting hole. After the fourth nut is screwed on the exposed fixing thread, the drive block and the piston are fixed and locked.

[0017] The brake pump body includes a conical spring, which is sleeved on the outside of the piston. The large end of the conical spring is inserted into the concave hole for radial and axial positioning, and the small end of the conical spring abuts against the outer end of the first nut and the end face of the closed end cap 2, so that the piston is inserted into the cylinder bore.

[0018] Optionally, the outer casing is provided with a second cylinder chamber, the closed end of the outer casing is provided with an extension end, the bottom of the second cylinder chamber is provided with an input screw hole that penetrates the outside, and the open end of the second cylinder chamber is circumferentially distributed with three through holes. After the second cylinder chamber fits the drive block, it is connected to several fixed ends of the closed end cover. The two fixing screws pass through the three through holes and are fixedly screwed to the two screw holes, connecting the outer casing and the closed end cover, so that the brake pump body forms a whole.

[0019] Optionally, the drive block of the brake pump body can be axially displaced in the second cylinder chamber, and the drive block synchronously drives the piston to axially displace in the cylinder bore.

[0020] The inner peripheral wall of the second cylinder chamber is elastically connected to the sealing ring.

[0021] Optionally, the storage compartment is provided with a storage compartment body, the lower end of the storage compartment body is provided with a connecting thread four, the storage compartment is provided with a receiving compartment, the lower end of the receiving compartment is provided with a channel four, and the receiving compartment and the channel four are connected to the cylinder bore air passage through an air passage;

[0022] The storage compartment includes a filter element, a sealing gasket, and a top cover. The bottom of the sealing gasket has an air hole 4031. The filter element is inserted into the opening of the storage compartment. The sealing gasket is installed on the upper end of the filter element. The top cover is threaded onto the upper end of the sealing gasket and the filter element and is connected to the upper opening of the storage compartment body.

[0023] Optionally, the brake pump body includes a bracket, which is fixed to the closed end cap by a fixing screw.

[0024] Optionally, the outer axial end of the external thread of the housing is provided with a guide end.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] 1. Improved sealing performance: The flow-blocking sealing ring structure with trapezoidal grooves can achieve adaptive deformation and compression of the piston under the action of pressurized gas, effectively enhancing the sealing fit, preventing gas leakage, and improving the overall airtightness.

[0027] 2. Stable and reliable structure: The shell, closed end cap, and outer shell are connected by threads and screw holes to form an integral unit, which enhances the structural integrity and assembly firmness of the brake pump and adapts to complex working conditions;

[0028] 3. Fast and stable air pressure response: The piston and drive block are linked, and synchronous driving is achieved through the axial movement of the drive block in the second cylinder chamber. The response is sensitive and can quickly output braking action, improving the braking efficiency and safety of the braking system.

[0029] 4. Self-cleaning air path design: The upper storage compartment is equipped with a filter element assembly, which can filter the air before it enters the cylinder, effectively blocking impurity particles, extending the service life of the system, and preventing wear of internal components.

[0030] 5. Reasonable energy return design: A conical spring is sleeved around the piston, which has good elastic restoring force, assists in realizing the piston's return function, and improves the automatic reset capability of the device. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of an air-pressurized brake pump according to an embodiment of this application.

[0032] Figure 2 yes Figure 1 The exploded diagram.

[0033] Figure 3 yes Figure 2 A schematic diagram of the flow-blocking sealing ring.

[0034] Explanation of reference numerals in the attached drawings: 100, Brake pump body; 1, Housing; 101, Main body; 102, Connecting end; 1021, Connecting screw hole; 1022, Air passage; 103, Guide end; 104, External thread; 105, Output screw hole; 106, Cylinder bore; 107, Inner groove one; 108, Inner groove two; 2, Closed end cap; 201, End cap body; 203, Connecting port; 204, Connecting screw hole; 205, Fixed end; 206, Screw hole two; 3, Outer shell; 301, Through hole three; 302, Second cylinder chamber; 303, Input screw hole; 304, Extension end; 4, Storage compartment; 401, Storage compartment body; 4011, Connecting thread four; 4012, Channel four; 4013, Receiving compartment; 402, Filter element; 403, Sealing gasket; 4031, Air hole; 404, Top cover;

[0035] 5. Bracket; 6. Fixing screw one; 7. Fixing screw two; 701. Trapezoidal groove; 8. First flow-blocking sealing ring; 81. Second flow-blocking sealing ring; 9. First nut; 11. Piston; 1101. Piston body; 1102. Guide post; 1103. Fixing thread; 12. Drive block; 1201. Inner recess; 1102. Connecting hole; 1203. Fourth inner groove; 13. Fourth nut; 14. Sealing ring; 15. Conical spring. Detailed Implementation

[0036] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0037] This application discloses an air-pressurized brake pump. (See also...) Figure 1 , Figure 2 The brake pump body 100 includes a housing 1, one end of the housing 1 is connected to a closed end cap 2, the other end of the closed end cap 2 is fixedly connected to an outer shell 3, the upper end of the housing 1 is connected to a storage compartment 4, and the inner cavity of the storage compartment 4 is connected to the air passage of the inner cavity of the housing 1.

[0038] The housing 1 has a cylinder bore 106 inside, and an inner groove 107 inside the cylinder bore 106. Several inner grooves 108 are provided on the side of the inner groove 107 facing the opening of the cylinder bore 106. A first flow-blocking sealing ring 8 is provided in the first groove 107, and a second flow-blocking sealing ring 81 is provided in each of the inner grooves 108. (Refer to...) Figure 3 The first flow-blocking sealing ring 8 and the second flow-blocking sealing ring 81 each have a trapezoidal groove 801 on one side. The opening of the trapezoidal groove 801 faces the cylinder bore 106 opening, forming a multi-stage sealing structure that effectively blocks the gas leakage path. Each sealing ring has a trapezoidal groove on one side. Under the action of air pressure, the trapezoidal groove facing the piston is radially compressed and deformed, making its inner wall more tightly fit the piston outer diameter surface, thereby achieving dynamic adaptive compression sealing and further improving the sealing tightness and stability. The flow-blocking sealing ring and the piston are connected by a flexible wrapping, which can adapt to small deviations during the movement process and reduce friction and wear. The trapezoidal groove 801 structure can maintain a stable contact pressure during compression deformation, extend the working life of the sealing ring, and improve the overall durability of the device.

[0039] The brake pump body 100 includes a piston 11, which is installed in the cylinder bore 106. The inner circumferential walls of the first flow-blocking sealing ring 8 and the second flow-blocking sealing ring 81 are flexibly wrapped and connected to the outer diameter of the piston 11. When the piston 11 moves axially toward the output screw hole 105 at the tail of the cylinder bore 106, the pressurized gas radially presses the trapezoidal groove 801 toward one side of the piston 11, so that the inner wall of the trapezoidal groove 801 is further flexibly fitted with the piston 11 to improve the sealing performance. Under the action of air pressure, the piston 11 moves smoothly along the axial direction of the cylinder bore 106, which can realize rapid pneumatic drive. The sealing structure is further compressed when the air pressure increases, reducing gas loss, improving air pressurization efficiency and braking response speed, which helps to improve the sensitivity and safety of the vehicle braking system.

[0040] Reference Figure 1 , Figure 2 The brake pump body 100 includes a housing 1, one end of the housing 1 is connected to a closed end cap 2, the other end of the closed end cap 2 is fixedly connected to a housing 3, and the upper end of the housing 1 is connected to a storage compartment 4, the inner cavity of the storage compartment 4 is connected to the air passage of the inner cavity of the housing 1.

[0041] The housing 1 has a cylinder bore 106 inside, and an inner groove 107 is provided inside the cylinder bore 106. Several inner grooves 108 are provided on the side of the inner groove 107 facing the opening of the cylinder bore 106. A first flow-blocking sealing ring 8 is installed in the inner groove 107. A second flow-blocking sealing ring 81 is provided in each inner groove 108. A trapezoidal groove 801 is provided on one side of both the first flow-blocking sealing ring 8 and the second flow-blocking sealing ring 81. The opening of the trapezoidal groove 801 faces the opening of the cylinder bore 106.

[0042] The brake pump body 100 includes a piston 11, which is installed in a cylinder bore 106. The inner peripheral walls of the first flow-blocking sealing ring 8 and the second flow-blocking sealing ring 81 form a flexible wrapping connection with the outer diameter of the piston 11. When the piston 11 moves axially along the cylinder bore 106 toward the tail output screw hole 105, the pressurized gas in the cylinder bore will press the trapezoidal groove 801 toward the piston 11, thereby causing the inner wall of the trapezoidal groove 801 to further flexibly fit with the piston 11, effectively improving the sealing performance.

[0043] The housing 1 has an external thread 104 on the side facing the cylinder bore 106. The external thread 104 is screwed into the connecting screw hole 204 of the closed end cover 2. The other side of the closed end cover 2 has a first nut 9. The first nut 9 is screwed into the external thread 104 to lock the closed end cover 2 and ensure the overall structure is sealed.

[0044] The housing 1 has a main body 101. A connecting end 102 extending outward is provided on the circumference of the main body 101. A connecting screw hole 1021 is provided in the connecting end 102. An air passage 1022 is provided on the bottom side of the connecting screw hole 1021. The air passage 1022 connects the connecting screw hole 1021 with the air passage of the cylinder bore 106, providing a stable guarantee for the gas passage of the system.

[0045] The closed end cap 2 includes an end cap body 201. One side of the end cap body 201 is provided with a connection port 203 for connecting with other structures or systems. On the other side of the end cap body 201, a plurality of fixed ends 205 are evenly distributed along the axial direction. Each fixed end 205 is provided with a through screw hole 206 for fixed connection with the outer shell 3.

[0046] The piston 11 includes a piston body 1101. One end of the piston body 1101 is provided with a guide post 1102. One end of the guide post 1102 is provided with a fixing thread 1103. The guide post 1102 passes through the connection hole 11021 of the drive block 12 and extends out to its other end. After the fixing thread 1103 is exposed, it is tightened by the fourth nut 13 to realize the tight connection between the drive block 12 and the piston 11.

[0047] The drive block 12 has a fourth inner groove 1203 on its outer circumference, in which a sealing ring 14 is embedded. The drive block 12 has an inner recessed hole 1201 inside, and a connecting hole 11021 at the bottom of the inner recessed hole 1201 for installing a guide post 1102. The drive block 12 and the piston 11 are fastened together by a fixing thread and a fourth nut 13, which improves the overall strength and sealing of the assembly.

[0048] The brake pump body 100 also includes a conical spring 15, which is sleeved on the outside of the piston 11. Its large end is embedded in the concave hole 1201 of the drive block 12 and is positioned radially and axially. Its small end abuts against the end face between the outer end of the first nut 9 and the end face of the closed end cover 2, thereby pressing the piston 11 into the cylinder bore 106 to form a preload and ensure the piston returns to its original position.

[0049] The outer casing 3 houses a second cylinder chamber 302. The closed end of the outer casing 3 has an extension end 304. The bottom of the second cylinder chamber 302 has an input screw hole 303 that passes through to the outside for air input. The open end of the second cylinder chamber 302 has circumferentially distributed through holes 301. After the drive block 12 is installed in the second cylinder chamber 302, it is screwed into the screw hole 206 through the through hole 301 by a fixing screw 7, thus connecting the outer casing 3 and the closed end cover 2 into a single unit. The drive block 12 can move axially within the second cylinder chamber 302, simultaneously driving the piston 11 to reciprocate within the cylinder bore 106. The inner circumferential wall of the second cylinder chamber 302 is in elastic contact with the sealing ring 14, ensuring good sealing and smooth operation during movement.

[0050] The storage chamber 4 includes a main body 401, with a connecting thread 4011 at the lower end. Inside, there is a receiving chamber 4013, with a channel 4012 at its lower end, which connects to the air passage 1022. The storage chamber 4 contains a filter element 402, a sealing gasket 403, and a top cover 404. The sealing gasket 403 has an air hole 4031 at its bottom. The filter element 402 is inserted into the receiving chamber 4013, and the sealing gasket 403 covers the upper end of the filter element. The top cover 404 is fixedly connected to the upper opening of the main body 401 via threads, effectively filtering the incoming gas and preventing impurities from entering the system.

[0051] In addition, the brake pump body 100 also includes a bracket 5, which is fixed to the closed end cover 2 by a fixing screw 6, and is used to realize the overall installation and positioning of the brake pump body. A guide end 103 is also provided at the axial outer end of the external thread 104 of the housing 1, which plays an auxiliary role in installation guidance and component alignment.

[0052] The implementation principle of an air-pressurized brake pump according to an embodiment of this application is as follows: the brake pump introduces an air source and utilizes the principle of air pressurization to achieve stable driving and efficient braking of the piston. The core structure lies in the brake pump body, which includes key components such as a housing, a closed end cap, an outer shell, a piston, a drive block, a sealing system, a cylinder bore, and a filter storage compartment. During operation, external compressed air enters the second cylinder chamber through the input screw hole and pushes the drive block to move axially. The axially moving drive block drives the piston to move axially, and the gas pressure pushes the piston to slide axially within the cylinder bore. Through the flexible wrapping fit between the piston and the flow-blocking sealing ring and the adaptive sealing structure of the trapezoidal groove, the air pressure sealing is enhanced. The axial movement of the piston is completed by connecting the drive block through a guide post, thereby driving the braking mechanism to generate a pressurizing action. The first and second flow-blocking sealing rings, located within the cylinder bore, with their trapezoidal groove design on one side, can radially press and adhere to the piston surface under air pressure, effectively preventing gas leakage and improving the sealing efficiency of the cylinder chamber. A conical spring provides a return force to the piston, enabling the system to have self-resetting capability.

[0053] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An air-boosted brake pump characterized by: The system includes a brake pump body (100), which includes a housing (1), one end of which is connected to a closed end cap (2), the other end of which is fixedly connected to a shell (3), and the upper end of the housing (1) is connected to a storage compartment (4), the inner cavity of the storage compartment (4) being connected to the air passage of the inner cavity of the housing (1). The housing (1) is provided with a cylinder bore (106), and the cylinder bore (106) is provided with an inner groove (107). The inner groove (107) is provided with a plurality of inner grooves (108) on the side facing the opening of the cylinder bore (106). The inner groove (107) is provided with a first flow-blocking sealing ring (8), and the inner grooves (108) are all provided with second flow-blocking sealing rings (81). The first flow-blocking sealing ring (8) and the second flow-blocking sealing ring (81) are provided with trapezoidal grooves (801) on one side. The opening of the trapezoidal groove (801) faces the opening of the cylinder bore (106). The brake pump body (100) includes a piston (11), which is installed in the cylinder bore (106). The inner circumferential walls of the first flow-blocking sealing ring (8) and the second flow-blocking sealing ring (81) are flexibly wrapped around the outer diameter of the piston (11). When the piston (11) moves axially toward the output screw hole (105) at the tail of the cylinder bore (106), the pressurized gas radially presses the trapezoidal groove (801) toward one side of the piston (11), so that the inner wall of the trapezoidal groove (801) is further flexibly fitted with the piston (11) to improve the sealing performance.

2. The air-boosted brake pump of claim 1, wherein: The housing (1) has an external thread (104) on the side facing the cylinder bore (106) opening. The external thread (104) is screwed into the connecting screw hole (204) of the closed end cover (2). The closed end cover (2) has a first nut (9) on the other side, which is screwed into the external thread (104) to lock the closed end cover (2).

3. The air-boosted brake pump of claim 1, wherein: The housing (1) has a main body (101), and a connecting end (102) extending outward is provided on the circumference of the main body (101). The connecting end (102) has an inner concave hole (1021), and an air passage (1022) is provided on the bottom side of the inner concave hole (1021). The air passage (1022) connects the inner concave hole (1021) with the cylinder bore (106).

4. The air-boosted brake pump of claim 1, wherein: The closed end cap (2) is provided with an end cap body (201), and a connection port (203) is provided on one side of the end cap body (201). Several fixed ends (205) are evenly distributed axially on the other side of the connection port (203). Each fixed end (205) is provided with a through screw hole (206).

5. The air-boosted brake pump of claim 1, wherein: The piston (11) is provided with a piston body (1101), one end of the piston body (1101) is provided with a guide post (1102), one end of the guide post (1102) is provided with a fixing thread (1103), and the guide post (1102) is connected to the connecting hole (11021) of the drive block (12). The drive block (12) has a fourth inner groove (1203) on its outer circumference. A sealing ring (14) is embedded in the fourth inner groove (1203). The drive block (12) has an inner concave hole (1201). A connecting hole (11021) is provided at the bottom of the inner concave hole (1201). After the guide post (1102) is connected to the connecting hole (11021), the fixing thread (1103) extends out of the other end of the connecting hole (11021). After the fourth nut (13) is screwed onto the exposed fixing thread (1103), the drive block (12) and the piston (11) are fixed and locked. The brake pump body (100) includes a conical spring (15), which is sleeved on the piston (11). The large end of the conical spring (15) is inserted into the concave hole (1201) for radial and axial positioning. The small end of the conical spring (15) abuts against the outer end of the first nut (9) and the end face of the closed end cap (2) to insert the piston (11) into the cylinder bore (106).

6. The air-boosted brake pump of claim 1, wherein: The outer shell (3) is provided with a second cylinder chamber (302). The closed end of the outer shell (3) is provided with an extension end (304). The bottom of the second cylinder chamber (302) is provided with an input screw hole (303) that penetrates the outside. The open end of the second cylinder chamber (302) is circumferentially distributed with three through holes (301). After the second cylinder chamber (302) puts the drive block (12) into it, it is connected to several fixed ends (205) of the closed end cover (2). The second fixing screw (7) passes through the three through holes (301) and is fixedly screwed to the second screw hole (206), connecting the outer shell (3) and the closed end cover (2) so that the brake pump body (100) forms a whole.

7. The air boosted brake pump of any one of claims 1-6, wherein: The drive block (12) of the brake pump body (100) can be axially displaced in the second cylinder chamber (302), and the drive block (12) synchronously drives the piston (11) to be axially displaced in the cylinder bore (106). The inner peripheral wall of the second cylinder chamber (302) is elastically connected to the sealing ring (14).

8. The air-boosted brake pump of claim 1, wherein: The storage compartment (4) is provided with a storage compartment body (401), the lower end of the storage compartment body (401) is provided with a connecting thread four (4011), the storage compartment (4) is provided with a receiving compartment (4013), the lower end of the receiving compartment (4013) is provided with a channel four (4012), the receiving compartment (4013) and the channel four (4012) are connected to the air passage of the cylinder bore (106) through the air passage (1022); The storage compartment (4) includes a filter element (402), a sealing gasket (403), and a top cover (404). The bottom of the sealing gasket (403) is provided with an air hole (4031). The filter element (402) is inserted into the opening of the storage compartment (4013). The sealing gasket (403) is installed on the upper end of the filter element (402). The top cover (404) is fitted on the upper end of the sealing gasket (403) and the filter element (402) and threadedly connected to the upper opening of the storage compartment body (401).

9. The air-boosted brake pump of claim 1, wherein: The brake pump body (100) comprises a bracket (5) fixed with the closed end cover (2) by a fixing screw (6).

10. The air-boosted brake pump of claim 1, wherein: The outer end of the outer thread (104) of the shell (1) is provided with a guide end (103).

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