Vacuum booster suitable for pressure difference detection

Abstract

The utility model belongs to the field of automobile parts, and particularly relates to a vacuum booster suitable for pressure difference detection, which comprises a vacuum booster main body, a push rod is fixedly mounted on one side of the vacuum booster main body, a main cylinder and a joint are fixedly communicated with the other side of the vacuum booster main body, a liquid storage chamber is fixedly communicated with the top of the main cylinder, and the liquid storage chamber is fixedly communicated with the vacuum booster main body. A connecting assembly is arranged on the surface of the connector and comprises a sealing shell. By arranging the connecting assembly, the connector and the metal pipe of the mechanical vacuum pump can be fixed, the using stability and sealing performance between the connector and the metal pipe are improved, meanwhile, the twisting block is used for driving the cam to rotate, the metal pipe of the mechanical vacuum pump can be rapidly disassembled, and therefore the maintenance efficiency is improved; the problems that after an existing vacuum booster is communicated with a mechanical vacuum pump, maintenance is not facilitated, a pipeline made of rubber is prone to damage, and then air leakage of the vacuum booster is caused are solved.

Description

Technical Field

[0001] The utility model relates to the field of automotive parts, specifically a vacuum booster applicable to pressure difference detection. Background Technique

[0002] The vacuum booster is an important component in the automotive braking system. Its main function is to utilize the pressure difference between the vacuum generated by the vacuum pump and the atmospheric pressure to enhance the force exerted by the driver on the brake pedal, thereby improving the braking effect and ensuring safe and rapid braking.

[0003] After the existing vacuum booster is installed, it needs to be connected to a mechanical vacuum pump. The conventional connection method is to use a rubber pipeline to sleeve on the joint on one side of the vacuum booster, and then use a cable tie to fix it. After the cable tie is fixed, on the one hand, it is not easy to disassemble and maintain, and on the other hand, the rubber pipeline is easy to be damaged, resulting in air leakage in the vacuum booster and easily causing situations such as brake failure; therefore, in view of the above problems, a vacuum booster applicable to pressure difference detection is proposed. Content of the Utility Model

[0004] In order to make up for the deficiencies of the prior art and solve the problems that after the existing vacuum booster is connected to the mechanical vacuum pump, it is not conducive to maintenance, and the rubber pipeline is easy to be damaged, resulting in air leakage in the vacuum booster, the utility model proposes a vacuum booster applicable to pressure difference detection.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a vacuum booster applicable to pressure difference detection, including a vacuum booster main body. One side of the vacuum booster main body is fixedly installed with a push rod. The other side of the vacuum booster main body is fixedly communicated with a master cylinder and a joint. The top of the master cylinder is fixedly communicated with a reservoir. A connection component is arranged on the surface of the joint;

[0006] The connection component includes a sealing shell. The sealing shell is sleeved on the surface of the joint. The top of the sealing shell is rotatably connected with a torsion block. The surface of the torsion block is fixedly sleeved with a cam. Both sides of the cam are provided with positioning plates. One side of the two positioning plates opposite to each other is in contact with the surface of the cam. One side of the two positioning plates opposite to each other is fixedly connected with two limiting rods. One end of the limiting rod penetrates into the inner cavity of the sealing shell.

[0007] Preferably, sealing rings are fixedly connected to both sides of the sealing shell. The inner cavity of one of the sealing rings is in contact with the surface of the joint.

[0008] Preferably, a sealing sleeve is fixedly connected to the inner cavity of the sealing shell. The inner cavity of the sealing sleeve is in contact with the surface of the joint.

[0009] By setting the sealing sleeve, the metal pipe of the joint and the mechanical vacuum pump can be limited, improving the stability of their connection.

[0010] Preferably, a bearing is fixedly sleeved on the surface of the torsion block, and the outer ring of the bearing is fixedly connected to the surface of the sealing shell.

[0011] Preferably, two tension springs are arranged on the opposite sides of the two positioning plates. One end of the tension spring is fixedly connected to the surface of the sealing shell, and the other end of the tension spring is fixedly connected to the inner side of the positioning plate.

[0012] By setting the tension spring, the positioning plate can be reset, so that the joint and the metal pipe of the mechanical vacuum pump can be fixedly connected by using the limiting rod.

[0013] Preferably, a sound-absorbing cotton is arranged on the surface of the vacuum booster body, and the inner side of the sound-absorbing cotton is fixedly adhered to the surface of the vacuum booster body through double-sided tape.

[0014] Preferably, a shock isolation pad is arranged on one side of the vacuum booster body. The shock isolation pad is made of rubber, and one side of the shock isolation pad is fixedly adhered to the surface of the vacuum booster body through double-sided tape.

[0015] The advantages of the present utility model are as follows:

[0016] By setting the connection component, the present utility model can fix the joint and the metal pipe of the mechanical vacuum pump, improving the stability and sealing performance during their use. At the same time, by driving the cam to rotate with the torsion block, the metal pipe of the mechanical vacuum pump can be quickly disassembled, thus improving the maintenance efficiency. It solves the problems that after the existing vacuum booster is connected to the mechanical vacuum pump, it is not conducive to maintenance, and the rubber pipeline is prone to damage, resulting in air leakage of the vacuum booster. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to these drawings.

[0018] Figure 1 It is the overall structural schematic diagram of the present utility model;

[0019] Figure 2 It is the structural schematic diagram of the vacuum booster body, the liquid storage chamber and the joint of the present utility model;

[0020] Figure 3Structural sectional split view of the vacuum booster main body, sound-absorbing cotton and shock isolation pad of the present utility model;

[0021] Figure 4 Structural split view of the connection component and joint of the present utility model;

[0022] Figure 5 Structural sectional view of the connection component of the present utility model.

[0023] In the figure: 1. Vacuum booster main body; 2. Push rod; 3. Master cylinder; 4. Joint; 5. Liquid storage chamber; 6. Connection component; 601. Sealing shell; 602. Torsion block; 603. Cam; 604. Positioning plate; 605. Limit rod; 606. Sealing ring; 607. Sealing sleeve; 608. Bearing; 609. Tension spring; 7. Sound-absorbing cotton; 8. Shock isolation pad. Specific implementation manners

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0025] The following is a further detailed description of the present application in conjunction with the attached Figures 1-5 to further illustrate the present application in detail.

[0026] The embodiments of the present application disclose a vacuum booster applicable to pressure difference detection. Referring to the figures, Figure 2 , Figure 3 , Figure 4 and Figure 5 , a vacuum booster applicable to pressure difference detection includes a vacuum booster main body 1. A push rod 2 is fixedly installed on one side of the vacuum booster main body 1. A master cylinder 3 and a joint 4 are fixedly communicated on the other side of the vacuum booster main body 1. A liquid storage chamber 5 is fixedly communicated with the top of the master cylinder 3. A connection component 6 is arranged on the surface of the joint 4;

[0027] The connecting component 6 includes a sealing shell 601 sleeved on the surface of the joint 4. A torsion block 602 is rotatably connected to the top of the sealing shell 601. A cam 603 is fixedly sleeved on the surface of the torsion block 602. Positioning plates 604 are arranged on both sides of the cam 603. The opposite sides of the two positioning plates 604 are in contact with the surface of the cam 603. Two limiting rods 605 are fixedly connected to the opposite sides of the two positioning plates 604. One end of the limiting rod 605 penetrates into the inner cavity of the sealing shell 601. By providing the connecting component 6, the joint 4 and the metal pipe of the mechanical vacuum pump can be fixed, improving the stability and sealing performance during their use. At the same time, by driving the cam 603 to rotate with the torsion block 602, the metal pipe of the mechanical vacuum pump can be quickly disassembled, thus improving the maintenance efficiency.

[0028] Refer to Figure 4 and Figure 5 , sealing rings 606 are fixedly connected to both sides of the sealing shell 601. The inner cavity of one of the sealing rings 606 is in contact with the surface of the joint 4. By providing the sealing rings 606, the sealing shell 601 can be sealed to prevent gas leakage from causing brake failure.

[0029] Refer to Figure 5 , a sealing sleeve 607 is fixedly connected to the inner cavity of the sealing shell 601. The inner cavity of the sealing sleeve 607 is in contact with the surface of the joint 4. By providing the sealing sleeve 607, the joint 4 and the metal pipe of the mechanical vacuum pump can be limited, improving the stability of their connection.

[0030] Refer to Figure 5 , a bearing 608 is fixedly sleeved on the surface of the torsion block 602. The outer ring of the bearing 608 is fixedly connected to the surface of the sealing shell 601. By providing the bearing 608, the torsion block 602 can be limited, thus improving the stability of the torsion block 602 during use.

[0031] Refer to Figure 5 , two tension springs 609 are arranged on the opposite sides of the two positioning plates 604. One end of the tension spring 609 is fixedly connected to the surface of the sealing shell 601, and the other end is fixedly connected to the inner side of the positioning plate 604. By providing the tension springs 609, the positioning plates 604 can be reset, so that the limiting rods 605 can be used to fixedly connect the joint 4 and the metal pipe of the mechanical vacuum pump.

[0032] Refer to Figure 1 、 Figure 2 and Figure 3 , a sound-absorbing cotton 7 is arranged on the surface of the vacuum booster main body 1. The inner side of the sound-absorbing cotton 7 is fixedly bonded to the surface of the vacuum booster main body 1 through double-sided tape. By providing the sound-absorbing cotton 7, on the one hand, it can protect the outer shell of the vacuum booster main body 1, and on the other hand, it can perform sound-absorbing treatment on the vacuum booster main body 1, thereby reducing the transmission of noise.

[0033] Refer to Figure 1 and Figure 3 On one side of the vacuum booster main body 1, a shock isolation pad 8 is provided. The material of the shock isolation pad 8 is rubber, and one side of the shock isolation pad 8 is fixedly bonded to the surface of the vacuum booster main body 1 through double-sided tape; by providing the shock isolation pad 8, the shock isolation effect on the vacuum booster main body 1 can be achieved, thereby improving the stability of the vacuum booster main body 1 during use.

[0034] Working principle: During use, the staff inserts the metal pipe of the mechanical vacuum pump into the inner cavity of the sealing sleeve 607, so that one end of the metal pipe of the mechanical vacuum pump contacts one end of the joint 4. Subsequently, the torsion block 602 is rotated. When the torsion block 602 rotates, it drives the cam 603 to rotate. After the cam 603 rotates and disengages from the contact with the positioning plate 604, the reaction force of the tension spring 609 drives the two positioning plates 604 to move towards each other, so that the two positioning plates 604 drive the four limiting rods 605 to move towards each other, and the metal pipe and the joint 4 can be fixed, thereby improving the stability and sealing performance of their connection. When the vacuum booster main body 1 is installed to ensure that the inside of the vacuum booster main body 1 is filled with vacuum, the staff turns off the engine and continuously presses the brake pedal several times to consume the vacuum in the booster. During the process of pressing the pedal, pay attention to observing the height and the required force of the pedal. If the first foot feels very light and the stroke is large when pressing the pedal, and the subsequent several pedals become heavier and the height gradually increases, this usually indicates that the vacuum booster main body 1 is working normally because the vacuum is gradually consumed. If there is no obvious difference in the feeling of each pedal step, it may indicate that there is a leakage problem in the vacuum booster main body 1 or the pipeline. Subsequently, by rotating the torsion block 602, the cam 603 presses the two positioning plates 604, and the metal pipe can be disassembled, thus facilitating the staff to maintain and repair the vacuum booster main body 1.

[0035] The above shows and describes the basic principle, main features and advantages of the present invention. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. A vacuum booster applicable to pressure difference detection, characterized in that: It includes a vacuum booster body (1), a push rod (2) is fixedly installed on one side of the vacuum booster body (1), a master cylinder (3) and a joint (4) are fixedly communicated with the other side of the vacuum booster body (1), a liquid storage chamber (5) is fixedly communicated with the top of the master cylinder (3), and a connection assembly (6) is arranged on the surface of the joint (4); The connection assembly (6) includes a sealing shell (601), the sealing shell (601) is sleeved on the surface of the joint (4), a torsion block (602) is rotatably connected to the top of the sealing shell (601), a cam (603) is fixedly sleeved on the surface of the torsion block (602), positioning plates (604) are arranged on both sides of the cam (603), the opposite sides of the two positioning plates (604) are in contact with the surface of the cam (603), two limiting rods (605) are fixedly connected to the opposite sides of the two positioning plates (604), and one end of the limiting rod (605) penetrates into the inner cavity of the sealing shell (601).

2. The vacuum booster applicable to pressure difference detection according to claim 1, characterized in that: Sealing rings (606) are fixedly connected to both sides of the sealing shell (601), and the inner cavity of one of the sealing rings (606) is in contact with the surface of the joint (4).

3. The vacuum booster applicable to pressure difference detection according to claim 1, wherein: A sealing sleeve (607) is fixedly connected to the inner cavity of the sealing shell (601), and the inner cavity of the sealing sleeve (607) is in contact with the surface of the joint (4).

4. The vacuum booster applicable to pressure difference detection according to claim 1, characterized in that: A bearing (608) is fixedly sleeved on the surface of the torsion block (602), and the outer ring of the bearing (608) is fixedly connected to the surface of the sealing shell (601).

5. The vacuum booster applicable to pressure difference detection according to claim 1, wherein: Two tension springs (609) are arranged on the opposite sides of the two positioning plates (604), one end of the tension spring (609) is fixedly connected to the surface of the sealing shell (601), and the other end of the tension spring (609) is fixedly connected to the inner side of the positioning plate (604).

6. The vacuum booster applicable to pressure difference detection according to claim 1, characterized in that: A sound-absorbing cotton (7) is arranged on the surface of the vacuum booster body (1), and the inner side of the sound-absorbing cotton (7) is fixedly bonded to the surface of the vacuum booster body (1) through double-sided tape.

7. The vacuum booster applicable to pressure difference detection according to claim 1, characterized in that: A shock isolation pad (8) is arranged on one side of the vacuum booster body (1), the material of the shock isolation pad (8) is rubber, and one side of the shock isolation pad (8) is fixedly bonded to the surface of the vacuum booster body (1) through double-sided tape.

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