Vacuum booster

Abstract

The utility model discloses a vacuum booster which comprises a shell cover, a shell, a control valve assembly, a diaphragm, a spring seat, a return spring, an input push rod and an output push rod, the shell cover is arranged on one side of the shell, the shell cover and the shell are spliced to form a closed cavity, the control valve assembly is arranged on the shell cover, the diaphragm is arranged on the control valve assembly, the spring seat is arranged on the diaphragm, and the return spring is arranged on the input push rod. The folding edge is in interference fit with the connecting part, so that the shell cover and the shell are compactly spliced, meanwhile, the cover disc part can be prevented from rotating by clamping the folding pressing sheet and the limiting groove, so that the shell cover is prevented from rotating and deviating when being spliced on the shell, the bent folding pressing sheet is used for tightly pressing the cover disc part, and the shell cover is prevented from rotating and deviating when being spliced on the shell. According to the vacuum booster, the cover disc part is stably arranged on the inner side of the connecting part, so that the shell cover is not easy to separate from the shell, the splicing firmness of the shell cover and the shell is enhanced, and the splicing of the shell cover and the shell of the vacuum booster has better firmness.

Description

Technical Field

[0001] This utility model relates to a vacuum booster. Background Technology

[0002] Vacuum boosters are key components in automotive braking systems. They typically consist of a housing, diaphragm, control valve, pushrod assembly, vacuum check valve, and return spring. Their primary function is to amplify the braking force applied by the driver, making braking easier and more effective. The housing of a vacuum booster is usually assembled from a shell and a cover. The robustness of this assembly determines the booster's ability to withstand mechanical stress during braking, especially under high-load conditions such as emergency braking. Therefore, developing a vacuum booster with a robust shell-cover assembly is of significant practical importance. Utility Model Content

[0003] The purpose of this invention is to provide a vacuum booster to solve the problems mentioned in the background art.

[0004] To solve the above problems, the present invention adopts the following technical solution:

[0005] A vacuum booster includes a cover, a housing, a control valve assembly, a diaphragm, a spring seat, a return spring, an input push rod, and an output push rod. The cover is disposed on one side of the housing, and the cover and housing are joined to form a closed cavity. The control valve assembly is disposed on the cover, and the diaphragm is disposed on the control valve assembly. The spring seat is fixed to the inner wall of the housing, and the return spring is disposed between the control valve assembly and the spring seat. The input push rod and the output push rod are respectively disposed on both sides of the control valve assembly. The cover includes a cover plate portion and a convex plate portion. The part is located on one side of the housing, the convex part is located on the cover part, the convex part is provided with the mounting cylinder part, the control valve assembly is located in the mounting cylinder part, the edge of the cover part is provided with a folded edge, and multiple limiting grooves are provided in a ring at equal intervals on the folded edge, the housing includes a shell cover part, the shell cover part is located on one side of the shell cover, the edge of one side of the shell cover part is provided with a connecting part, the side wall of the connecting part is provided with multiple folding pressure plates in a ring at equal intervals, the inner wall of the connecting part fits against the folded edge, and the folding pressure plates are engaged with the corresponding limiting grooves.

[0006] Preferably, the inner wall of the housing portion is provided with an annular groove, and the edge of the diaphragm is engaged between the inner wall of the housing portion and the annular groove.

[0007] Preferably, one end of the mounting cylinder is a metal cylinder, and the other end of the mounting cylinder is a rubber corrugated pipe.

[0008] Preferably, four mounting studs are fixedly provided on the convex portion.

[0009] Preferably, the housing portion is provided with a vacuum check valve, and the vacuum check valve is provided with a rubber stopper.

[0010] The beneficial effects of this utility model are as follows: This utility model allows the folded edge and the connecting part to be interference-fitted, so that the cover and the shell are tightly assembled. At the same time, the folding pressure plate and the limiting groove can prevent the cover plate from rotating, thereby avoiding rotational deviation when the cover is assembled on the shell. Furthermore, the bent folding pressure plate tightly presses the cover plate, so that the cover plate is stably set on the inner side of the connecting part, making it difficult for the cover to detach from the shell. This strengthens the firmness of the assembly between the cover and the shell, and makes the assembly of the cover and the shell of the vacuum booster have better firmness. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below, but this is not a limitation on the scope of protection of this utility model.

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0013] Figure 2 This utility model Figure 1 Enlarged view of point A in the middle;

[0014] Figure 3 This utility model Figure 1 Schematic diagram of the structure of the middle shell cover 11;

[0015] Figure 4 This utility model Figure 4 A schematic diagram showing the distribution of the central limiting groove on the folded edge;

[0016] Figure 5 This utility model Figure 1 Schematic diagram of the middle shell structure;

[0017] Figure 6 This utility model Figure 5 Enlarged view of point B in the middle;

[0018] Figure 7 This utility model Figure 6 A schematic diagram of the distribution of the folded tablets on the connecting part.

[0019] In the diagram: 11. Cover; 12. Housing; 13. Control valve assembly; 14. Diaphragm; 15. Annular groove; 16. Spring seat; 17. Return spring; 18. Input push rod; 19. Output push rod; 20. Vacuum check valve; 21. Cover plate; 22. Protruding plate; 23. Folded edge; 24. Restricting groove; 25. Mounting stud; 26. Mounting cylinder; 27. Housing cover; 28. Connecting part; 29. ​​Folding pressure plate. Detailed Implementation

[0020] See Figures 1 to 7 The vacuum booster shown includes a cover 11, a housing 12, a control valve assembly 13, a diaphragm 14, a spring seat 16, a return spring 17, an input push rod 18, and an output push rod 19. The cover 11 is disposed on one side of the housing 12, and the cover 11 and the housing 12 are joined to form a closed cavity. The control valve assembly 13 is disposed on the cover 11, the diaphragm 14 is disposed on the control valve assembly 13, the spring seat 16 is fixed to the inner wall of the housing 12, and the return spring 17 is disposed between the control valve assembly 13 and the spring seat 16. Input push rod 18 and output push rod 19 are respectively disposed on both sides of control valve assembly 13. The housing cover 11 includes a cover plate portion 21 and a convex plate portion 22. The cover plate portion 21 is disposed on one side of housing 12, and the convex plate portion 22 is disposed on the cover plate portion 21. The convex plate portion 22 is provided with a mounting cylinder portion 26, and the control valve assembly 13 is disposed within the mounting cylinder portion 26. A folded edge 23 is provided at the edge of the cover plate portion 21, formed by folding the edge of the cover plate portion 21. Multiple limiting grooves 24 are arranged in a ring at equal intervals on the folded edge 23. The housing 12 includes a housing cover portion 27, which is disposed on one side of the housing cover 11. A connecting portion 28 is provided at the edge of one side of the housing cover portion 27. Multiple folded pressure plates 29 are arranged in a ring at equal intervals on the side wall of the connecting portion 28. The connection between the connecting portion 28 and the housing cover portion 27 forms a boss-like structure. When the housing cover 11 and the housing 12 are assembled, the cover plate portion 21 extends into the connecting portion 28 and abuts against the boss structure at the connection between the connecting portion 28 and the housing cover portion 27. The folded edge 23 is tightly attached to the inner wall of the connecting portion 28. The two are in an interference fit, so that the housing cover... The cover 11 is tightly assembled with the housing 12. The inner wall of the connecting part 28 fits against the folded edge 23. The folding pressure plate 29 engages with the corresponding limiting groove 24. The engagement of the folding pressure plate 29 with the limiting groove 24 can prevent the cover plate 21 from rotating, thereby avoiding rotational displacement when the cover 11 is assembled on the housing 12. The bent folding pressure plate 29 presses tightly against the cover plate 21, so that the cover plate 21 is stably set on the inner side of the connecting part 28, making it difficult for the cover 11 to detach from the housing 12, thereby strengthening the firmness of the assembly between the cover 11 and the housing 12.

[0021] The control valve assembly 13 consists of components such as an air valve, a vacuum valve, a valve seat, and a reaction disc. It can adjust the balance between the vacuum level and atmospheric pressure inside the vacuum booster, thereby amplifying the force of the driver pressing the brake pedal and achieving a light and efficient braking effect. The input push rod 18 is connected to the air valve of the control valve assembly 13, and the output push rod 19 is connected to the reaction disc of the control valve assembly 13. The control valve assembly 13, the input push rod 18, and the output push rod 19 can be directly purchased from the market. Their specific structure and installation method are common technical means used by those skilled in the art, so they will not be described in detail here.

[0022] Furthermore, an annular groove 15 is provided on the inner wall of the housing 27, and the edge of the diaphragm 14 is engaged between the inner wall of the housing 27 and the annular groove 15. The center of the diaphragm 14 is provided with a hole, and the diaphragm 14 uses the central hole to tightly clamp the outer wall of the control valve assembly 13. The edge of the diaphragm 14 is engaged between the inner wall of the housing 27 and the annular groove 15, thereby making the diaphragm 14 stably installed.

[0023] Furthermore, one end of the mounting cylinder 26 is a metal cylinder, and the other end of the mounting cylinder 26 is a rubber bellows. The rubber bellows part of the mounting cylinder 26 can be appropriately extended or retracted according to the working state of the vacuum booster.

[0024] Furthermore, four mounting studs 25 are fixedly provided on the convex portion 22, and the vehicle's braking system is provided with threaded holes corresponding to the mounting studs 25. The vacuum booster can be installed on the vehicle's braking system using the mounting studs 25.

[0025] Furthermore, a vacuum check valve 20 is provided on the housing 27, and a rubber plug is provided on the vacuum check valve 20. The vacuum check valve 20 can maintain the vacuum level inside the vacuum booster to ensure stable and reliable braking assist effect. When packaging and transporting the vacuum booster, the rubber plug seals the opening of the vacuum check valve 20 to prevent foreign objects from falling into the vacuum check valve 20 and causing blockage. When installing the vacuum booster on the vehicle's braking system, the rubber plug is removed from the vacuum check valve 20, and the vacuum check valve 20 is connected to the engine intake manifold.

[0026] The working principle of this utility model is as follows: when the cover 11 and the housing 12 are assembled together, the cover plate 21 extends into the connecting part 28 and abuts against the boss structure at the connection between the connecting part 28 and the cover part 27. The folded edge 23 is in close contact with the inner wall of the connecting part 28, and the two are in an interference fit, so that the cover 11 and the housing 12 are assembled tightly. At the same time, the folding pressure plate 29 and the limiting groove 24 are used to prevent the cover plate 21 from rotating, thereby avoiding the rotational displacement of the cover 11 when it is assembled on the housing 12. The bent folding pressure plate 29 presses tightly against the cover plate 21, so that the cover plate 21 is stably set on the inner side of the connecting part 28, making it difficult for the cover 11 to detach from the housing 12, thereby strengthening the firmness of the assembly of the cover 11 and the housing 12.

[0027] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions conceived without inventive effort should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope defined in the claims.

Claims

1. A vacuum booster, comprising a cover, a housing, a control valve assembly, a diaphragm, a spring seat, a return spring, an input push rod, and an output push rod, characterized in that: The cover is disposed on one side of the housing, and the cover and the housing are joined to form a closed cavity. The control valve assembly is disposed on the cover, and the diaphragm is disposed on the control valve assembly. The spring seat is fixed on the inner wall of the housing, and the return spring is disposed between the control valve assembly and the spring seat. The input push rod and the output push rod are respectively disposed on both sides of the control valve assembly. The cover includes a cover plate and a convex plate. The cover plate is disposed on one side of the housing, and the convex plate is disposed on the cover plate. The convex plate has a mounting cylinder. The control valve assembly is disposed inside the mounting cylinder. The edge of the cover plate has a folded edge. Multiple limiting grooves are arranged in a ring at equal intervals on the folded edge. The housing includes a housing cover. The housing cover is disposed on one side of the cover. A connecting part is disposed on the edge of one side of the housing cover. Multiple folding pressure plates are arranged in a ring at equal intervals on the side wall of the connecting part. The inner wall of the connecting part fits against the folded edge, and the folding pressure plates are engaged with the corresponding limiting grooves.

2. A vacuum booster according to claim 1, characterized in that: The inner wall of the housing is provided with an annular groove, and the edge of the diaphragm is engaged between the inner wall of the housing and the annular groove.

3. A vacuum booster according to claim 1, characterized in that: One end of the mounting cylinder is a metal cylinder, and the other end is a rubber corrugated pipe.

4. A vacuum booster according to claim 1, characterized in that: Four mounting studs are fixedly installed on the cam portion.

5. A vacuum booster according to claim 1, characterized in that: The housing is equipped with a vacuum check valve, and the vacuum check valve is equipped with a rubber stopper.

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