Lightweight brake pump system for light trucks

Abstract

This invention relates to the field of automotive braking, specifically providing a lightweight brake pump system for light trucks. The system includes a brake pump housing. A retaining ring is installed on one side of the housing, acting on a push rod inside a connector and an external telescopic cylinder. The telescopic cylinder can be deformed under pressure and then spring back to its original position. A foot brake assembly is connected to one end of the telescopic cylinder. By pressing the pedal of the foot brake assembly, the assembly rotates and generates downward pressure. This downward pressure causes the push rod to slide. As the push rod slides, it causes a piston push plate to move along the inner side of the brake pump housing. The piston push plate's movement generates thrust, which squeezes the brake fluid and converts the pressure into braking force, which is then transmitted to the other brake calipers. Because the piston push plate has a large contact area with the brake fluid, the brake fluid responds quickly to the thrust, resulting in greater braking force and better performance for the brake calipers.

Description

Technical Field

[0001] This invention relates to the field of automotive braking, and more particularly to a lightweight brake pump system for light trucks. Background Technology

[0002] Light trucks refer to cargo vehicles with a total weight of less than 6 tons. Their fuel economy and handling performance have always been the focus of manufacturers and users. In automobile manufacturing, the braking system is a crucial component. The braking system usually consists of brakes, brake pads, brake fluid, and brake pumps. As the core component of the braking system, the brake pump is mainly used to provide braking pressure and convert the driver's foot force into braking force. Currently, brake pumps on the market are mainly divided into two types: vacuum-assisted brakes and hydraulic-assisted brakes.

[0003] The inventors have discovered the following problems during practical use:

[0004] In hydraulic power steering, the piston is generally cylindrical. When subjected to the force of a person's foot, it is pushed and transmits this force to the brake fluid. However, because the contact area between the cylindrical end and the brake fluid is small, the pressure may be insufficient, resulting in insufficient braking force. Furthermore, brake pumps typically use rubber seals. These seals have the advantages of being elastic and easy to install and replace, but they are susceptible to corrosion from oil and high temperatures, which can lead to aging, leakage, and failure of the seals. These problems can affect the performance and lifespan of the brake pump.

[0005] Therefore, it is necessary to provide a lightweight brake pump system for light trucks to solve the above-mentioned technical problems. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a lightweight brake pump system for light trucks, which addresses the above-mentioned deficiencies of the prior art.

[0007] To achieve the above objectives, the technical solution of the present invention is: a lightweight brake pump system for light trucks, comprising a brake pump housing, a fixing ring fixedly installed on one side of the brake pump housing, and a central hole provided in the middle of both sides of the brake pump housing. A push rod is movably engaged inside the central hole. One end of the push rod passes through the inner side of the fixing ring and is fixedly connected to a telescopic cylinder. A foot brake assembly is movably installed at one end of the telescopic cylinder. A fluid outlet pipe is fixedly installed at the bottom of one side of the brake pump housing, a fluid inlet pipe is fixedly installed on one side of the top of the brake pump housing, a brake fluid cylinder is fixedly installed at the center of the top of the brake pump housing, and a sealing ring assembly is movably engaged in the middle of one side of the brake pump housing.

[0008] Optionally, the top of the brake pump housing is provided with an input hole, one end of the fluid inlet pipe is fixedly snapped into the inside of the input hole, and the other end of the fluid inlet pipe is fixedly connected to the inside of the brake fluid cylinder.

[0009] By adopting the above technical solution, it is beneficial to deliver brake fluid to the inside of the inlet pipe by starting the brake fluid cylinder, and then into the brake pump housing after passing through the inlet hole.

[0010] Optionally, a piston push plate is fixedly sleeved on the outer side of the push rod, a pressure spring is fixedly connected to one side of the piston push plate, one end of the pressure spring is fixedly connected to the inner side of the brake pump housing, a booster pump assembly is provided on the outer side of one end of the push rod, and the other end of the push rod is connected to the sealing ring assembly.

[0011] By adopting the above technical solution, it is beneficial to move the piston push plate and the booster pump assembly together by pushing the round rod to compress the pressure spring, thereby achieving the effect of transmitting braking force.

[0012] Optionally, the outer side of the piston pusher plate is slidably engaged with the inner side of the brake pump housing, one side of the piston pusher plate is provided with a liquid inner cavity, and the other side of the piston pusher plate is provided with a vacuum inner cavity;

[0013] By adopting the above technical solution, it is advantageous to have two independent spaces inside the brake pump housing, which are distributed on both sides of the piston push plate, and these spaces can be squeezed by the piston push plate.

[0014] Optionally, the bottom side of the brake pump housing is provided with an output hole, one end of the liquid outlet tube is fixedly snapped to the inner side of the output hole, the other end of the liquid outlet tube is located inside the liquid cavity, and the other end of the liquid outlet tube is located outside the brake pump housing.

[0015] By adopting the above technical solution, when the liquid cavity is squeezed, the brake fluid inside will be squeezed and delivered out through the fluid outlet pipe.

[0016] Optionally, the piston push plate has a hole in its center, and one end of the push rod is fixedly connected to the inner side of the hole.

[0017] Optionally, the sealing ring assembly includes a rubber ring with an inner hole inside. A plastic ring is fixedly connected to one end of the rubber ring, and an adjuster is movably installed on the outside of the rubber ring. A circular groove is provided on the outside of one end of the rubber ring.

[0018] By adopting the above technical solution, it is beneficial to set the sealing ring assembly into multiple parts, and through the action of multiple parts, it can fully and tightly fit with the outer side of the brake pump housing.

[0019] Optionally, the outer side of the circular groove is fixedly engaged with the inner side of one of the central holes, and the inner side of the inner hole of the ring is slidably engaged with the outer side of the pushing circular rod.

[0020] By adopting the above technical solution, the sealing ring assembly can be firmly fixed here by the snap-fit ​​of the circular groove, without affecting the sliding of the push rod inside the ring hole.

[0021] Optionally, the adjuster includes a bolt, one end of which is located outside the rubber ring, and the other end of which is fixedly connected to a pressure plate. One end of the pressure plate is fixedly connected to an expansion ring, which is installed inside the plastic ring.

[0022] By adopting the above technical solution, the pressure plate can be stressed by rotating the bolt on the outside of the rubber ring. The force of the pressure plate causes the expansion ring to expand and squeeze the plastic ring, which can keep the plastic ring in a taut state.

[0023] Optionally, the outer side of the rubber ring is tightly fitted to the outer side of the brake pump housing, and the outer side of the plastic ring is tightly fitted to one side of the liquid cavity;

[0024] By adopting the above technical solution, the plastic ring can be tightly pressed against the liquid inner cavity, preventing the brake fluid from seeping out. Furthermore, the rubber ring is tightly fitted to the outer side of the brake pump housing, making the sealing ring assembly more secure and preventing it from falling off.

[0025] Compared with related technologies, the lightweight brake pump system for light trucks provided by this invention has the following advantages:

[0026] This invention provides a lightweight brake pump system for light trucks. A push rod is installed inside the brake pump housing, and a piston push plate is installed on the outside of the push rod. The outside of the piston push plate is slidably connected to the inside of the brake pump housing. When one end of the push rod is subjected to the squeezing force of the telescopic cylinder, it pushes the piston push plate to move together. Since one side of the piston push plate is a liquid cavity containing brake fluid, and the brake fluid is in complete contact with one side of the piston push plate, a large amount of brake fluid can be pushed and squeezed, thereby generating greater pressure in the brake fluid. This results in a very large pushing force on the brake fluid inside the fluid outlet pipe, which can improve the braking force generated by the brake pump system.

[0027] This invention provides a lightweight brake pump system for light trucks. A sealing ring assembly is snapped into the inner side of a central hole, and the inner side of the central hole is engaged with a circular groove. This positions the rubber ring on the outer side of the brake pump housing and the plastic ring on the inner side, ensuring the sealing ring assembly is securely installed in the central hole. To prevent the sealing ring assembly from softening due to prolonged high-temperature aging, which could affect its sealing performance, an expansion ring is provided inside the plastic ring. By using a screwdriver to rotate the bolt, pressure is applied to the pressure plate, causing the expansion ring to expand. This keeps the plastic ring taut, preventing it from detaching from the fluid cavity and ensuring that it doesn't soften or loosen due to high temperatures after prolonged contact with the brake fluid, thus maintaining a tight seal and preventing any impact on braking performance. Finally, rotating the bolt stops the expansion ring from expanding further, facilitating the removal and replacement of the sealing ring assembly. Attached Figure Description

[0028] Figure 1 A schematic diagram of a preferred embodiment of the lightweight brake pump system for light trucks provided by the present invention;

[0029] Figure 2 This is an internal sectional view of the brake pump housing structure of the present invention;

[0030] Figure 3 This is a schematic diagram showing the disassembly of the pushing rod and piston push plate of the present invention;

[0031] Figure 4 This is a schematic diagram of the outer structure of the brake pump housing of the present invention;

[0032] Figure 5 This is a schematic diagram of the sealing ring assembly structure of the present invention;

[0033] Figure 6 This is an internal cross-sectional view of the sealing ring assembly structure of the present invention.

[0034] The diagram shows the following components: 1. Brake pump housing; 101. Retaining ring; 102. Liquid inner cavity; 103. Vacuum inner cavity; 104. Central hole; 105. Input hole; 106. Output hole; 2. Push rod; 201. Piston push plate; 2011. Plate hole; 202. Pressure spring; 203. Power booster pump assembly; 3. Telescopic cylinder; 4. Foot brake assembly; 5. Fluid outlet pipe; 6. Fluid inlet pipe; 7. Brake fluid cylinder; 8. Sealing ring assembly; 801. Rubber ring; 8011. Ring inner hole; 802. Plastic ring; 803. Adjuster; 8031. Bolt; 8032. Pressure plate; 8033. Expansion ring; 804. Circular groove. Detailed Implementation

[0035] To facilitate understanding of the present invention, a more comprehensive description will be given below with reference to the accompanying drawings. Typical embodiments of the present invention are shown in the drawings.

[0036] Example 1:

[0037] like Figure 1 As shown, the lightweight brake pump system for light trucks of the present invention includes a brake pump housing 1. A fixing ring 101 is installed on one side of the brake pump housing 1. The action of the push rod 2 inside the connector and the external telescopic cylinder 3 allows the telescopic cylinder 3 to be deformed by compression and to spring back to its original position under force. A foot brake assembly 4 is connected to one end of the telescopic cylinder 3. By stepping on one end of the foot brake assembly 4, the pressure is applied to the foot brake assembly 4, and the force is transmitted to the telescopic cylinder 3 and finally to the interior of the brake pump housing 1. At this time, the interior of the brake pump housing 1 is continuously supplied with brake fluid by the brake fluid cylinder 7 installed outside it. The brake fluid is connected to the brake pump housing 1 through the inlet pipe 6 and can be delivered to the interior of the brake pump housing 1. When the brake fluid is compressed inside the brake pump housing 1, it will be output from the inlet pipe 5 installed at the bottom of the brake pump housing 1. The pressure can be transmitted into braking force to the next component through the inlet pipe 5.

[0038] like Figure 2 As shown, a piston push plate 201 is installed on the outside of the push rod 2, and a pressure spring 202 is installed on one side of the piston push plate 201 to reset the push rod 2 when the braking force pushes it back. One side of the piston push plate 201 is set as a liquid inner cavity 102 for storing brake fluid, and the other side of the piston push plate 201 is set as a vacuum inner cavity 103 for being in a vacuum pressure chamber. When the push rod 2 moves, it will drive the piston push plate 201 to squeeze the brake fluid inside the liquid inner cavity 102 and compress the pressure spring 202 on one side.

[0039] like Figure 3 As shown, the piston push plate 201 has a plate hole 2011 in the middle for engaging with the outer side of the push rod 2 and moving together with the push rod 2 to drive the piston push plate 201 to move. A booster pump assembly 203 is installed at one end of the push rod 2 to push the assist push rod 2.

[0040] In practice, when a light truck needs braking force, simply pressing one end of the foot brake assembly 4 causes it to rotate and generate downward pressure. This downward pressure compresses the telescopic cylinder 3, allowing the connected push rod 2 to slide along the inside of the brake pump housing 1. As the push rod 2 slides, it causes the piston push plate 201 to move along the inside of the brake pump housing 1. Since one side of the piston push plate 201 is a liquid cavity 102, a large amount of brake fluid is supplied to this area by the brake fluid cylinder 7 through the inlet pipe 6. One side of the piston push plate 201 will be in contact with a large amount of brake fluid. At this time, the movement of the piston push plate 201 generates... The thrust will squeeze the brake fluid. As the brake fluid is squeezed, it will be directed towards the inside of the inlet pipe 5, and the pressure generated by the brake fluid will be converted into braking force and transmitted to the other brake calipers, thus producing a braking effect. Because the piston push plate 201 has a large contact area with the brake fluid, the brake fluid responds quickly to the thrust, resulting in a greater braking force on the brake calipers and a better effect. When one end of the foot brake assembly 4 no longer generates downward pressure, the elastic force of the pressure spring 202 will push the piston push plate 201 to move in the opposite direction and compress the air inside the vacuum cavity 103, thus putting the inside of the vacuum cavity 103 under pressure, which will facilitate the next thrust on the piston push plate 201.

[0041] Example 2:

[0042] like Figures 4 to 5 As shown, based on Embodiment 1, the present invention provides a technical solution: by providing an input hole 105 at the top of the brake pump housing 1 for fixing the connection of the infusion tube 6, and by providing an output hole 106 at the bottom of the brake pump housing 1 for fixing the connection of the outfusion tube 5, by providing a central hole 104 to allow the push rod 2 to pass through and the sealing ring assembly 8 to be installed therein, by providing a rubber ring 801 on the outside of the brake pump housing 1 and a plastic ring 802 on the inside of the brake pump housing 1, the sealing performance of the inside and outside of the brake pump housing 1 can be increased, and by providing an inner hole 8011, the sliding and moving of the push rod 2 through it is not affected. Finally, an adjuster 803 is installed on the outside of the rubber ring 801 so that the hardness of the plastic ring 802 can be changed by rotating the adjuster 803.

[0043] like Figure 6 As shown, the circular groove 804 allows the sealing ring assembly 8 to better engage with the central hole 104. By setting the adjuster 803 as a bolt 8031, a pressure plate 8032, and an expansion ring 8033, rotating the bolt 8031 ​​can cause the pressure plate 8032 to be stressed and the expansion ring 8033 to expand, thereby causing the plastic ring 802 to become taut from the inside out, thus hardening the plastic ring 802 and preventing it from softening due to corrosion from high-temperature oil.

[0044] During implementation, when the expansion ring 8033 is no longer under pressure and expands by rotating the bolt 8031 ​​in the opposite direction, the plastic ring 802 is in a relatively soft state. The plastic ring 802 can be inserted into the interior of the brake pump housing 1 through the central hole 104. During the insertion process, the position of the circular groove 804 and the central hole 104 is engaged, which will make the sealing ring assembly 8 firmly installed in the position of the central hole 104. At this time, the pressure plate 8032 is pressured by rotating the bolt 8031 ​​in the forward direction, and the expansion ring 8033 expands. The expansion of the expansion ring 8033 will support the plastic ring 802 and make it no longer soft. This can prevent the plastic ring 802 from coming out of the position of the central hole 104. It can also prevent the end of the pushing rod 2 from softening and loosening due to the movement, sliding and the influence of high temperature brake fluid after passing through the inner hole 8011, which would cause brake fluid leakage and affect the braking effect of the brake pump.

[0045] The advantages of this technical solution in practical applications include, but are not limited to, the following:

[0046] 1. By using a larger piston pusher plate 201 that is in direct contact with the brake fluid, the brake fluid can respond to pressure more quickly and generate greater braking force.

[0047] 2. The use of a plastic ring 802 with controllable softness and hardness prevents it from loosening due to high temperature and causing poor sealing. It can also be easily removed and replaced by adjusting the adjuster 803.

[0048] The implementation principle of the lightweight brake pump system for light trucks in this application embodiment is as follows: When the light truck needs braking force, simply pressing one end of the foot brake assembly 4 will cause the foot brake assembly 4 to rotate and generate downward pressure. This downward pressure will compress the telescopic cylinder 3, allowing the connected push rod 2 to slide along the inside of the brake pump housing 1. When the push rod 2 slides, it will also cause the piston push plate 201 to move along the inner side of the brake pump housing 1. Since one side of the piston push plate 201 is a liquid cavity 102, this area is supplied by the brake fluid cylinder 7 and... The inlet pipe 6 delivers a large amount of brake fluid inside. One side of the piston pusher plate 201 comes into contact with a large amount of brake fluid. At this time, the movement of the piston pusher plate 201 generates thrust, which squeezes the brake fluid. As the brake fluid is squeezed, it is directed towards the inside of the outlet pipe 5, and the pressure generated by the brake fluid is converted into braking force and transmitted to the other brake calipers, producing a braking effect. Because the piston pusher plate 201 has a large contact area with the brake fluid, the brake fluid responds quickly to the thrust, resulting in a greater braking force on the brake calipers and a better effect. When one end of the foot brake assembly 4 is no longer... After the downward pressure is generated, the elastic force of the pressure spring 202 will push the piston push plate 201 to move in the opposite direction and compress the air inside the vacuum cavity 103, thus putting the inside of the vacuum cavity 103 under pressure, which facilitates the next thrust on the piston push plate 201. Then, when the expansion ring 8033 is no longer under force and expands by rotating the bolt 8031 ​​in the opposite direction, the plastic ring 802 is in a relatively soft state. The plastic ring 802 can be inserted into the brake pump housing 1 through the central hole 104. During the insertion process, the position of the circular groove 804 and the central hole 104 will be engaged, which will make... The sealing ring assembly 8 is securely installed in the central hole 104. Then, by rotating the bolt 8031 ​​in the forward direction, the pressure plate 8032 is pressured and the expansion ring 8033 expands. The expansion ring 8033 supports the plastic ring 802, making it no longer soft. This not only prevents the plastic ring 802 from coming out of the central hole 104, but also prevents the push rod 2 from softening and loosening due to sliding and the influence of high-temperature brake fluid after passing through the inner hole 8011, thus preventing brake fluid leakage and affecting the braking effect of the brake pump.

[0049] This application has the following technical features:

[0050] 1. A retaining ring 101 is fixedly installed on one side of the brake pump housing 1 to ensure the stability of the system.

[0051] 2. The top of the brake pump housing 1 is provided with an inlet hole 105. One end of the fluid inlet pipe 6 is fixedly connected to the inside of the inlet hole 105, and the other end of the fluid inlet pipe 6 is fixedly connected to the inside of the brake fluid cylinder 7, so that the brake fluid can flow smoothly.

[0052] 3. A piston push plate 201 is fixedly sleeved on the outer side of the push rod 2. A pressure spring 202 is fixedly connected to one side of the piston push plate 201. A booster pump assembly 203 is provided on the outer side of one end of the push rod 2, and the other end is connected to the sealing ring assembly 8, so that the system has a better braking effect.

[0053] 4. The outer side of the piston push plate 201 is slidably engaged with the inner side of the brake pump housing 1. One side of the piston push plate 201 is provided with a liquid inner cavity 102 and the other side is provided with a vacuum inner cavity 103, which can realize hydraulic power-assisted braking.

[0054] 5. One end of the brake pump housing 1 has an output hole 106 at the bottom. One end of the liquid outlet pipe 5 is fixedly connected to the inner side of the output hole 106. The other end of the liquid outlet pipe 5 is located inside the liquid cavity 102, which can ensure the normal operation of the brake pump system.

[0055] 6. The piston push plate 201 has a plate hole 2011 at its center. The outer side of one end of the push rod 2 is fixedly connected to the inner side of the plate hole 2011, which can increase the stability of the system.

[0056] 7. The sealing ring assembly 8 includes components such as a rubber ring 801 and a plastic ring 802, which can play a sealing role.

[0057] The lightweight brake pump system for light trucks disclosed in this application has the advantages of simple structure, easy use, and high efficiency, and is suitable for braking systems of light trucks and other vehicles.

[0058] 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. A lightweight brake pump system for light trucks, comprising a brake pump housing (1), characterized in that: A fixing ring (101) is fixedly installed on one side of the brake pump housing (1). A central hole (104) is provided in the middle of both sides of the brake pump housing (1). A push rod (2) is movably engaged in the inner side of the central hole (104). One end of the push rod (2) passes through the inner side of the fixing ring (101) and is fixedly connected to a telescopic cylinder (3). A foot brake assembly (4) is movably installed in one end of the telescopic cylinder (3). An infusion pipe (5) is fixedly installed at the bottom of one side of the brake pump housing (1). An infusion pipe (6) is fixedly installed on one side of the top of the brake pump housing (1). A brake fluid cylinder (7) is fixedly installed in the center of the top of the brake pump housing (1). A sealing ring assembly (8) is movably engaged in the middle of one side of the brake pump housing (1). The sealing ring assembly (8) includes a rubber ring (801), the inside of the rubber ring (801) is provided with an inner hole (8011), one end of the rubber ring (801) is fixedly connected to a plastic ring (802), an adjuster (803) is movably installed on the outside of the rubber ring (801), and a circular groove (804) is provided on the outside of one end of the rubber ring (801). The regulator (803) includes a bolt (8031), one end of which is located outside the rubber ring (801), and the other end of which is fixedly connected to a pressure plate (8032). One end of the pressure plate (8032) is fixedly connected to an expansion ring (8033), and the expansion ring (8033) is installed inside the plastic ring (802).

2. The lightweight brake pump system for light trucks according to claim 1, characterized in that, The top of the brake pump housing (1) is provided with an input hole (105). One end of the inlet pipe (6) is fixedly snapped into the inside of the input hole (105), and the other end of the inlet pipe (6) is fixedly connected to the inside of the brake fluid cylinder (7).

3. The lightweight brake pump system for light trucks according to claim 1, characterized in that, A piston push plate (201) is fixedly sleeved on the outside of the push rod (2). A pressure spring (202) is fixedly connected to one side of the piston push plate (201). One end of the pressure spring (202) is fixedly connected to the inside side of the brake pump housing (1). A booster pump assembly (203) is provided on the outside of one end of the push rod (2). The other end of the push rod (2) is connected to the sealing ring assembly (8).

4. The lightweight brake pump system for light trucks according to claim 3, characterized in that, The outer side of the piston push plate (201) is slidably engaged with the inner side of the brake pump housing (1). One side of the piston push plate (201) is provided with a liquid inner cavity (102), and the other side of the piston push plate (201) is provided with a vacuum inner cavity (103).

5. The lightweight brake pump system for light trucks according to claim 1, characterized in that, The brake pump housing (1) has an output hole (106) at the bottom of one side. One end of the liquid outlet pipe (5) is fixedly connected to the inner side of the output hole (106). The other end of the liquid outlet pipe (5) is located inside the liquid cavity (102) and the other end of the liquid outlet pipe (5) is located outside the brake pump housing (1).

6. The lightweight brake pump system for light trucks according to claim 3, characterized in that, The piston push plate (201) has a plate hole (2011) inside its center, and one end of the push rod (2) is fixedly connected to the inner side of the plate hole (2011).

7. The lightweight brake pump system for light trucks according to claim 1, characterized in that, The outer side of the circular groove (804) is fixedly engaged with the inner side of one of the central holes (104), and the inner side of the inner hole (8011) is slidably engaged with the outer side of the push rod (2).

8. The lightweight brake pump system for light trucks according to claim 1, characterized in that, The outer side of the rubber ring (801) is tightly fitted to the outer side of the brake pump housing (1), and the outer side of the plastic ring (802) is tightly fitted to one side of the liquid cavity (102).

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