A new type of air booster pump

Abstract

This invention discloses a novel air booster pump, relating to the field of air booster pump technology. It includes a brake housing, a connecting disc, and an air chamber housing connected in sequence. The brake housing has a reservoir, and a brake piston is located within it. An air chamber piston is located within the air chamber housing. The air chamber piston is connected to the brake piston via a push rod. A sealing gasket, which can be sealed to the push rod, is located near one end of the brake piston near the air chamber piston. The diameter of the free end of the sealing gasket is smaller than the diameter of the push rod's contact surface. One end of the push rod is fixedly connected to the air chamber piston, and the other end passes through the sealing gasket and the brake piston, and is movably connected to the brake piston. This application eliminates the push rod seat connecting the brake piston and push rod in conventional air booster pumps, ensuring braking sensitivity and thus increasing safety. This application achieves rapid and sensitive response by directly connecting the brake piston and push rod, improving braking safety. This application also saves braking response time.

Description

Technical Field

[0001] This invention belongs to the field of air booster pump technology, and in particular relates to a novel air booster pump. Background Technology

[0002] The existing air booster pump includes a brake housing, an air chamber housing, a liquid reservoir, and a push rod. The brake housing has a brake chamber with a movable brake piston. The air chamber housing has an air chamber with a movable air chamber piston and a return spring. The brake housing has a liquid outlet, and the liquid outlet and the liquid reservoir are connected to the brake chamber. The brake housing and the air chamber housing are fixed together by a connector. The connector has a push rod through hole with a push rod. One end of the push rod is connected to the brake piston, and the other end is connected to the air chamber piston. The air chamber housing is made of stamped steel plate and has a breather and an air inlet, which are located on both sides of the air chamber piston.

[0003] The patent application, CN201721835595.8, entitled "Breathing Structure of Air Pump for Braking System of Engineering Machinery," describes a push rod on a push rod piston assembly that passes through an end cover and is fixed to a push rod seat on a hydraulic piston inside a hydraulic cylinder. The push rod separates the push rod seat from the sealing surface of the hydraulic piston, ensuring that the φ3 small hole in the hydraulic piston is unobstructed. Brake fluid enters the inner cavity of the hydraulic cylinder through the φ3 small hole. The push rod pushes against the push rod seat to seal the sealing surface of the hydraulic piston, forming high-pressure oil in the inner cavity of the hydraulic cylinder. The structure of the push rod, push rod seat, and hydraulic piston is relatively complex, affecting the sensitivity of braking and posing a safety hazard. Therefore, developing a new type of air pump is crucial. Summary of the Invention

[0004] The purpose of this invention is to provide a novel air booster pump to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution: This invention relates to a novel air booster pump, comprising a brake housing, a connecting disc, and an air chamber housing connected in sequence. The brake housing is equipped with a liquid storage tank, and a brake piston is disposed within the brake housing. An air chamber piston is disposed within the air chamber housing, and the air chamber piston is connected to the brake piston via a push rod. A sealing gasket, which can be sealed to the push rod, is disposed at one end of the brake piston near the air chamber piston. The diameter of the free end of the sealing gasket is smaller than the diameter of the contact surface of the push rod. One end of the push rod is fixedly connected to the air chamber piston, and the other end passes through the sealing gasket and the brake piston, and is movably connected to the brake piston.

[0006] Furthermore, the push rod includes a connecting end connected to the air chamber piston and a positioning plug connected to the brake piston. The free end of the positioning plug is provided with a stop pin, and the fixed end is provided with a sealing platform that can be sealed and connected to the sealing gasket.

[0007] Furthermore, the connecting end is connected to the air chamber piston, the brake piston is provided with an oil passage, the sealing gasket fixed end is fixedly connected to the brake piston, and the free end extends from one end of the brake piston to one end of the air chamber piston.

[0008] Furthermore, the sealing gasket is built into one end of the oil passage, or the sealing gasket is disposed on the brake piston.

[0009] Furthermore, the stop pin is located at the end of the oil passage away from the piston in the gas chamber; or the stop pin is located inside the oil passage, and the oil passage is provided with a step to block the stop pin.

[0010] Furthermore, the brake piston is provided with a snap-fit ​​sealing ring, which is located between the brake piston and the brake housing.

[0011] Furthermore, the brake housing is provided with a limiting platform for defining the connecting disc.

[0012] Furthermore, the outer wall of the connecting disc is connected to the limiting platform, and the inner wall is provided with a locking nut that is detachably connected to the brake housing.

[0013] Furthermore, a pump housing plug is provided between the brake housing and the push rod, with one end of the pump housing plug located inside the brake housing and the other end located inside the air chamber housing.

[0014] Furthermore, a sealing ring is provided between the pump housing plug and the brake housing, and a bracket is provided on the connecting plate.

[0015] The present invention has the following beneficial effects: 1. This application eliminates the push rod seat connecting the brake piston and push rod in conventional air booster pumps, ensuring the sensitivity of braking and thus increasing safety.

[0016] 2. This application achieves a sensitive and rapid response by directly connecting the brake piston and the push rod, thereby improving braking safety.

[0017] 3. This application saves braking reaction time.

[0018] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1This is a cross-sectional view of the structure of a novel air booster pump in the connected state according to the present invention.

[0021] Figure 2 This is a schematic diagram of the structure of a novel air booster pump according to the present invention.

[0022] Figure 3 for Figure 1 A magnified view of A in the middle.

[0023] Figure 4 This is a schematic diagram of the push rod structure of a novel air booster pump according to the present invention.

[0024] Figure 5 This is a schematic diagram of the brake piston, sealing gasket, sealing ring, and support ring structure of a novel air booster pump according to the present invention.

[0025] Figure 6 This is a structural cross-sectional view of a novel air booster pump in its sealed state according to the present invention.

[0026] Figure 7 This is a schematic diagram of another braking piston, sealing gasket, sealing ring, and support ring structure of a novel air booster pump according to the present invention.

[0027] Figure 8 This is a schematic diagram of another braking piston, sealing gasket, pump casing plug, and air chamber piston structure of a novel air booster pump according to the present invention.

[0028] Figure 9 This is a schematic diagram of another braking piston, sealing gasket, pump casing plug, and air chamber piston structure of a novel air booster pump according to the present invention.

[0029] In the diagram, 1. Air chamber housing; 2. Brake housing; 3. Liquid reservoir; 4. Push rod; 5. Connecting plate; 6. Locking nut; 7. Brake piston; 8. Pump housing plug; 9. Sealing gasket; 10. Sealing ring; 11. Support ring; 12. Air chamber piston; 13. Bracket; 14. Limiting platform; 15. Air inlet; 41. Positioning plug; 42. Sealing platform; 43. Connecting end; 44. Stop pin; 71. Oil passage. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Please see Figure 1-9As shown, the present invention is a novel air booster pump, comprising a brake housing 2, a connecting disc 5, and an air chamber housing 1 connected in sequence. The brake housing 2 is provided with a liquid storage tank 3. The brake housing 2 is provided with a brake piston 7. The air chamber housing 1 is provided with an air chamber piston 12. The air chamber piston 12 is connected to the brake piston 7 through a push rod 4. The brake piston 7 is provided with a sealing gasket 9 near the air chamber piston 12, which can be sealed to the push rod 4. The diameter of the free end of the sealing gasket 9 is smaller than the diameter of the contact surface of the push rod 4. One end of the push rod 4 is fixedly connected to the air chamber piston 12, and the other end passes through the sealing gasket 9 and the brake piston 7, and is movably connected to the brake piston 7.

[0032] When the vehicle is stationary, liquid in the reservoir 3 enters the brake housing 2. The liquid flows through the gap between the sealing gasket 9 and the push rod 4 into the gap between the brake piston 7 and the push rod 4, then fills the inner cavity of the brake housing 2. High-pressure gas enters through the control air inlet 15. The high-pressure gas pushes the air chamber piston 12 to move, and the air chamber piston 12 drives the push rod 4 to seal against the sealing gasket 9 (e.g., Figure 6 As shown), when the vehicle needs to brake, push rod 4 continues to push the sealing gasket 9 and brake piston 7 to move, forming high-pressure braking; when the vehicle needs to stop braking, high-pressure gas is discharged through the air inlet 15, and the air chamber piston 12 moves back under the action of the return spring. The air chamber piston 12 drives push rod 4 away from the sealing gasket 9 to a connected state (as shown). Figure 1 As shown), the liquid in the brake housing 2 flows from the left side of the brake piston 7 to the right side through the oil passage 71, the brake fluid flows back, and the brake caliper releases the brake.

[0033] like Figure 4 As shown, the push rod 4 includes a connecting end 43 connected to the air chamber piston 12 and a positioning plug 41 connected to the brake piston 7. The free end of the positioning plug 41 is provided with a stop pin 44, and the fixed end is provided with a sealing platform 42 that can be sealed and connected to the sealing gasket 9.

[0034] The connecting end 43 is connected to the air chamber piston 12. The brake piston 7 is provided with an oil passage 71. The fixed end of the sealing gasket 9 is fixedly connected to the brake piston 7, and the free end extends from one end of the brake piston 7 to one end of the air chamber piston 12.

[0035] like Figure 5-9 As shown, the sealing gasket 9 is built into one end of the oil passage 71, or the sealing gasket 9 is disposed on the brake piston 7. The connection between the sealing gasket 9 and the brake piston 7 can be any sealable connection with the sealing platform 42, such as... Figure 3 , Figure 5 , Figure 7 , Figure 8 or Figure 9 .

[0036] The stop pin 44 is located at the end of the oil passage 71 away from the piston 12 in the gas chamber; or the stop pin 44 is located inside the oil passage 71, and the oil passage 71 is provided with a step to block the stop pin 44.

[0037] The brake piston 7 is provided with a snap-fit ​​sealing ring 10, which is located between the brake piston 7 and the brake housing 2. A support ring 11 is provided between the brake piston 7 and the brake housing 2.

[0038] The brake housing 2 is provided with a limiting platform 14 for limiting the connecting disc 5.

[0039] The outer wall of the connecting plate 5 is connected to the limiting platform 14, and the inner wall is provided with a locking nut 6 that is detachably connected to the brake housing 2.

[0040] A pump housing plug 8 is provided between the brake housing 2 and the push rod 4. One end of the pump housing plug 8 is located inside the brake housing 2, and the other end is located inside the air chamber housing 1. One end of the return spring on the push rod 4 is connected to the air chamber piston 12, and the other end can be connected to the pump housing plug 8 or sleeved on the brake housing 2.

[0041] A sealing ring is provided between the pump housing plug 8 and the brake housing 2. A bracket 13 is provided on the connecting plate 5.

[0042] This application eliminates the push rod seat connecting the brake piston 7 and push rod 4 in conventional air booster pumps, ensuring braking sensitivity and thus increasing safety. By directly connecting the brake piston 7 and push rod 4, this application achieves rapid and sensitive response, further enhancing braking safety and saving braking reaction time.

[0043] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0044] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A new type of air boost pump, comprising a brake housing (2), a connecting disc (5) and a gas chamber housing (1) connected in sequence, a liquid storage tank (3) is arranged on the brake housing (2), characterized in that: The brake housing (2) is provided with a brake piston (7), and the air chamber housing (1) is provided with an air chamber piston (12). The air chamber piston (12) is connected to the brake piston (7) through a push rod (4). The brake piston (7) is provided with a sealing gasket (9) that can be sealed to the push rod (4) at one end near the air chamber piston (12). The diameter of the free end of the sealing gasket (9) is smaller than the diameter of the contact surface of the push rod (4). One end of the push rod (4) is fixedly connected to the air chamber piston (12), and the other end passes through the sealing gasket (9) and the brake piston (7), and is movably connected to the brake piston (7).

2. A novel air augmented pump as claimed in claim 1, wherein, The push rod (4) includes a connecting end (43) connected to the air chamber piston (12) and a positioning plug (41) connected to the brake piston (7). The positioning plug (41) has a stop pin (44) on its free end and a sealing platform (42) on its fixed end that can be sealed to the sealing gasket (9).

3. A novel air booster pump according to claim 2, characterized in that, The connecting end (43) is connected to the air chamber piston (12), the brake piston (7) is provided with an oil passage (71), the fixed end of the sealing gasket (9) is fixedly connected to the brake piston (7), and the free end extends from one end of the brake piston (7) to one end of the air chamber piston (12).

4. A novel air booster pump according to claim 3, characterized in that, The sealing gasket (9) is built into one end of the oil passage (71), or the sealing gasket (9) is set on the brake piston (7).

5. A novel air booster pump according to claim 4, characterized in that, The stop pin (44) is located at the end of the oil passage (71) away from the piston (12) in the gas chamber; or the stop pin (44) is located inside the oil passage (71), and the oil passage (71) is provided with a step to block the stop pin (44).

6. A novel air booster pump according to claim 1 or 2, characterized in that, The brake piston (7) is provided with a snap-fit ​​sealing ring (10), which is located between the brake piston (7) and the brake housing (2).

7. A novel air booster pump according to claim 1 or 2, characterized in that, The brake housing (2) is provided with a limiting platform (14) for limiting the connecting disc (5).

8. A novel air booster pump according to claim 7, characterized in that, The outer wall of the connecting plate (5) is connected to the limiting platform (14), and the inner wall is provided with a locking nut (6) that is detachably connected to the brake housing (2).

9. A novel air booster pump according to claim 1 or 2, characterized in that, A pump housing plug (8) is provided between the brake housing (2) and the push rod (4). One end of the pump housing plug (8) is located inside the brake housing (2), and the other end is located inside the air chamber housing (1).

10. A novel air booster pump according to claim 9, characterized in that, A sealing ring is provided between the pump housing plug (8) and the brake housing (2), and a bracket (13) is provided on the connecting plate (5).

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