Double-diaphragm penetrating vacuum booster

Abstract

The utility model belongs to the field of vacuum boosters, and particularly relates to a double-diaphragm penetrating vacuum booster which comprises an installation shell, a brake pedal connecting rod is arranged in the installation shell in a penetrating mode, a double-diaphragm power assisting device is arranged on the outer side of the brake pedal connecting rod, two screw rods are fixedly installed at the bottom of the installation shell, and the two screw rods are arranged on the outer side of the installation shell. A sealing cover is arranged on the top of the mounting shell and located on the outer side of the brake pedal connecting rod in a sleeving mode, four clamping blocks are fixedly mounted on the outer side of the mounting shell, and the tops of the clamping blocks contract towards the center of the sealing cover; auxiliary movement during automobile braking is achieved through cooperation of the mounting shell, the sealing cover, the vacuumizing connector, the brake pedal connecting rod and the double-diaphragm power assisting device, the first negative pressure cavity and the second negative pressure cavity are formed through arrangement of the inner cavity of the mounting shell, the first diaphragm and the second diaphragm, and power assisting during automobile braking can be achieved twice. The problem that the treading force is large when the automobile is braked emergently is solved.

Description

Technical Field

[0001] The utility model relates to the field of vacuum boosters, in particular to a double-diaphragm penetrating vacuum booster. Background Art

[0002] The vacuum booster is a component that uses vacuum (negative pressure) to increase the force applied by the driver to the pedal. The vacuum booster is generally located between the brake pedal and the brake master cylinder. For ease of installation, it is usually combined with the master cylinder into one component, and a part of the master cylinder extends into the vacuum booster housing.

[0003] The vacuum booster is an auxiliary device for automobile braking. In actual use, the brake pedal is stepped on to connect the outside with the internal vacuum front chamber of the vacuum brake, and the air pressure difference pushes the push rod to control the operation of the hydraulic oil pump. Traditional vacuum boosters often have only one diaphragm inside, so that there is only one vacuum chamber inside the vacuum booster. When facing emergency braking, the auxiliary driving force of a single vacuum chamber is low, which makes the person's pedaling force greater, and it is more difficult to use, which cannot meet actual use needs. Therefore, technical personnel in this field provide a double diaphragm through-the-vacuum booster to solve the problems raised in the above background technology. Utility Model Content

[0004] In order to make up for the deficiencies of the prior art, a traditional vacuum booster is often only provided with one diaphragm, so that there is only one vacuum chamber inside the vacuum booster. When facing emergency braking, the auxiliary driving force of the single vacuum chamber is low, which makes the personnel's pedaling force larger and the use more strenuous. The utility model proposes a double diaphragm penetrating the vacuum booster.

[0005] The technical solution adopted by the utility model to solve the technical problem is: a double diaphragm through-vacuum booster, comprising a mounting shell, a brake pedal connecting rod is inserted in the mounting shell, a double diaphragm booster device is arranged on the outside of the brake pedal connecting rod, two screws are fixedly installed on the bottom of the mounting shell, a sealing cover is sleeved on the top of the mounting shell and located on the outside of the brake pedal connecting rod, four clamping blocks are fixedly installed on the outside of the mounting shell, the top of the clamping block shrinks toward the center of the sealing cover, and a mounting cover is sleeved on the top of the sealing cover and located on the outside of the brake pedal connecting rod;

[0006] The double diaphragm assist device includes a first diaphragm, the first diaphragm is sleeved outside the brake pedal connecting rod, the first diaphragm is located inside the installation shell, a second diaphragm is sleeved outside the brake pedal connecting rod and below the first diaphragm, a first negative pressure chamber is formed between the first diaphragm and the second diaphragm, a second negative pressure chamber is formed between the bottom of the second diaphragm and the inner cavity of the installation shell, and two second extrusion blocks are fixedly installed outside the brake pedal connecting rod and below the first diaphragm and the second diaphragm.

[0007] Preferably, a first spring is sleeved outside the brake pedal connecting rod at the bottom of the first diaphragm, the bottom of the first spring contacts the top of the second diaphragm, a second spring is sleeved outside the brake pedal connecting rod at the bottom of the second diaphragm, and the bottom of the second spring contacts the bottom of the inner cavity of the installation shell.

[0008] Preferably, a second sealing piece is fixedly installed at the top of the first diaphragm, and a second sealing plug is sleeved outside the brake pedal connecting rod and above the second sealing piece.

[0009] Preferably, a first sealing piece is fixedly installed at the top of the second diaphragm, and a first sealing plug is sleeved outside the brake pedal connecting rod and above the first sealing piece.

[0010] Preferably, a vacuum extraction interface is communicated with the right side of the bottom of the installation shell, and a pressure sensor is embedded in the bottom of the installation shell and in front of the vacuum extraction interface.

[0011] Preferably, a first sealing gasket is placed on the top of the installation shell, and the top of the first sealing gasket contacts the bottom of the sealing cover.

[0012] Preferably, a sealing plate is arranged inside the installation cover and outside the brake pedal connecting rod, a third spring is sleeved outside the brake pedal connecting rod at the bottom of the sealing plate, the bottom of the third spring contacts the top of the first diaphragm, and two first extrusion blocks are fixedly installed outside the brake pedal connecting rod and above the sealing plate.

[0013] Preferably, a second sealing gasket is placed inside the installation cover, and the bottom of the second sealing gasket contacts the top of the sealing plate.

[0014] The beneficial effects of the present utility model are as follows:

[0015] The utility model realizes the auxiliary movement during vehicle braking through the cooperation among the mounting shell, the sealing cover, the vacuum pumping interface, the brake pedal connecting rod and the double-diaphragm boosting device. By providing the inner cavity of the mounting shell, the first diaphragm and the second diaphragm to form the first negative pressure cavity and the second negative pressure cavity, the boosting during vehicle braking can be achieved twice, avoiding the problem of excessive stepping force during emergency braking of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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 use in the description of the embodiments or the prior art. Obviously, the following-described drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 is a structural schematic diagram of the present utility model;

[0018] Figure 2 is a structural schematic diagram of the interior of the mounting shell of the present utility model;

[0019] Figure 3 is an isometric cross-sectional structural schematic diagram of the mounting shell of the present utility model;

[0020] Figure 4 is a structural schematic diagram of the double-diaphragm boosting device of the present utility model;

[0021] Figure 5 is an isometric cross-sectional structural schematic diagram of the double-diaphragm boosting device of the present utility model;

[0022] Figure 6 is an isometric structural schematic diagram of the mounting cover and the brake pedal connecting rod of the present utility model.

[0023] In the figure: 1, mounting shell; 2, sealing cover; 3, vacuum pumping interface; 4, pressure sensor; 5, clamping block; 6, mounting cover; 7, brake pedal connecting rod; 8, screw; 9, double-diaphragm boosting device; 901, first diaphragm; 902, second diaphragm; 903, first sealing plug; 904, second sealing piece; 905, second sealing plug; 906, first spring; 907, first sealing piece; 908, second spring; 909, first negative pressure cavity; 910, second negative pressure cavity; 911, second extrusion block; 10, first sealing gasket; 11, first extrusion block; 12, second sealing gasket; 13, sealing plate; 14, third spring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[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 will further describe the present application in detail Figures 1-6 in conjunction with the attached drawings.

[0026] The embodiments of the present application disclose a double diaphragm through vacuum booster. Refer to Figure 1 、 2 、3, 4, 5 and Figure 6 As shown in the figures, the double diaphragm through vacuum booster includes an installation shell 1. A brake pedal connecting rod 7 is inserted through the interior of the installation shell 1. A double diaphragm boosting device 9 is arranged outside the brake pedal connecting rod 7. Two screw rods 8 are fixedly installed at the bottom of the installation shell 1. A sealing cover 2 is sleeved outside the brake pedal connecting rod 7 at the top of the installation shell 1. Four clamping blocks 5 are fixedly installed on the outside of the installation shell 1. The top of the clamping block 5 shrinks towards the center of the sealing cover 2. An installation cover 6 is sleeved outside the brake pedal connecting rod 7 at the top of the sealing cover 2.

[0027] The double diaphragm boosting device 9 includes a first diaphragm 901. The first diaphragm 901 is sleeved outside the brake pedal connecting rod 7 and is located inside the installation shell 1. A second diaphragm 902 is sleeved outside the brake pedal connecting rod 7 and below the first diaphragm 901. A first negative pressure chamber 909 is formed between the first diaphragm 901 and the second diaphragm 902. A second negative pressure chamber 910 is formed between the bottom of the second diaphragm 902 and the inner cavity of the installation shell 1. Two second extrusion blocks 911 are fixedly installed outside the brake pedal connecting rod 7 and below the first diaphragm 901 and the second diaphragm 902 respectively.

[0028] Refer to Figure 3 、 4 and Figure 5 As shown in the figures, a first spring 906 is sleeved outside the brake pedal connecting rod 7 at the bottom of the first diaphragm 901. The bottom of the first spring 906 contacts the top of the second diaphragm 902. A second spring 908 is sleeved outside the brake pedal connecting rod 7 at the bottom of the second diaphragm 902. The bottom of the second spring 908 contacts the bottom of the inner cavity of the installation shell 1. The first spring 906 is provided to realize the return of the first diaphragm 901. The second spring 908 is provided to realize the return of the second diaphragm 902. The elastic potential energy of the second spring 908 is greater than that of the first spring 906, thereby realizing the return extrusion of the first diaphragm 901 and the second diaphragm 902.

[0029] Refer to Figure 4 and Figure 5 , a second sealing piece 904 is fixedly installed on the top of the first diaphragm 901. A second sealing plug 905 is sleeved on the outside of the brake pedal connecting rod 7 and on the top of the second sealing piece 904. The cooperation between the second sealing piece 904 and the second sealing plug 905 realizes the sealing between the bottom of the first diaphragm 901 and the inner cavity above the installation shell 1, avoiding external air from entering the inside of the first diaphragm 901 and causing the air pressure to drop.

[0030] Refer to Figure 4 and Figure 5 , a first sealing piece 907 is fixedly installed on the top of the second diaphragm 902. A first sealing plug 903 is sleeved on the outside of the brake pedal connecting rod 7 and on the top of the first sealing piece 907. The cooperation between the first sealing piece 907 and the first sealing plug 903 realizes the preliminary stepping separation between the first negative pressure chamber 909 and the second negative pressure chamber 910. At the same time, as the stepping continues, the first sealing plug 903 penetrates through the first sealing piece 907 and the second diaphragm 902 respectively, so that the first negative pressure chamber 909 and the second negative pressure chamber 910 are conducted, and the negative pressure inside the first negative pressure chamber 909 and the second negative pressure chamber 910 acts together to drive the brake pedal connecting rod 7 to move to realize the assistance.

[0031] Refer to Figure 1 , 2 and Figure 3 , a vacuum extraction interface 3 is connected to the right side of the bottom of the installation shell 1. A pressure sensor 4 is embedded in the bottom of the installation shell 1 and on the front side of the vacuum extraction interface 3. The vacuum extraction interface 3 is used to connect to a vacuum pump, and the pressure sensor 4 is used to detect the negative pressure value inside the installation shell 1.

[0032] Refer to Figure 2 and Figure 3 , a first sealing gasket 10 is placed on the top of the installation shell 1. The top of the first sealing gasket 10 contacts the bottom of the sealing cover 2. The first sealing gasket 10 is used to increase the connection sealing performance between the installation shell 1 and the sealing cover 2.

[0033] Refer to Figure 6 , a sealing plate 13 is arranged on the outside of the brake pedal connecting rod 7 and inside the installation cover 6. A third spring 14 is sleeved on the outside of the brake pedal connecting rod 7 and at the bottom of the sealing plate 13. The bottom of the third spring 14 contacts the top of the first diaphragm 901. Two first extrusion blocks 11 are fixedly installed on the outside of the brake pedal connecting rod 7 and on the top of the sealing plate 13. The third spring 14 is used to squeeze the sealing plate 13, thereby realizing the sealing of the inner side of the installation cover 6 and avoiding external air from entering the inside of the installation shell 1 and causing the installation shell 1 to communicate with the outside and the negative pressure cannot be generated.

[0034] Refer to Figure 6 , a second gasket 12 is placed inside the mounting cover 6, and the bottom of the second gasket 12 contacts the top of the sealing plate 13. The second gasket 12 is provided to increase the sealing performance between the sealing plate 13 and the inside of the mounting cover 6.

[0035] Working principle: The whole is installed in the vehicle through the screw 8, so that the bottom of the brake pedal connecting rod 7 is connected to the oil pump, and the top of the brake pedal connecting rod 7 is connected to the brake pedal. After the connection is completed, during actual use, when the vehicle starts, the inside of the first negative pressure chamber 909 and the second negative pressure chamber 910 in the mounting shell 1 is evacuated by the vacuum pump. When braking is required, stepping on the brake pedal causes the brake pedal connecting rod 7 to move inside the mounting shell 1. As the mounting shell 1 moves, the first sealing plug 903 moves into the first sealing piece 907, and the second sealing plug 905 moves into the second sealing piece 904, thereby separating the first negative pressure chamber 909, the second negative pressure chamber 910 and the top of the mounting shell 1. As the brake pedal connecting rod 7 continues to move, the first pressing block 11 contacts and presses the top of the sealing plate 13, causing the sealing plate 13 to descend. As the sealing plate 13 separates from the second gasket 12, the top of the mounting cover 6 and the mounting shell 1 is communicated with the outside. Under the action of atmospheric pressure, the first diaphragm 901 and the second diaphragm 902 press the second pressing block 911, thereby pushing the brake pedal connecting rod 7 to move and push the oil pump. As the brake pedal connecting rod 7 continues to move, the first sealing plug 903 moves to the bottom of the second diaphragm 902, making the first negative pressure chamber 909 and the second negative pressure chamber 910 communicate. Under the action of double negative pressure, the brake pedal connecting rod 7 is continuously pushed to move to achieve braking.

[0036] The above shows and describes the basic principle, main features and advantages of the present invention. Those skilled in the art 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. Double diaphragm through vacuum booster, characterized in that: It includes an installation shell (1). A brake pedal connecting rod (7) is inserted through the interior of the installation shell (1). A dual diaphragm booster device (9) is arranged on the outer side of the brake pedal connecting rod (7). Two screws (8) are fixedly installed at the bottom of the installation shell (1). A sealing cover (2) is sleeved on the top of the installation shell (1) and on the outer side of the brake pedal connecting rod (7). Four clamping blocks (5) are fixedly installed on the outer side of the installation shell (1). The top of the clamping block (5) shrinks towards the center of the sealing cover (2). An installation cover (6) is sleeved on the top of the sealing cover (2) and on the outer side of the brake pedal connecting rod (7); The dual diaphragm booster device (9) includes a first diaphragm (901). The first diaphragm (901) is sleeved on the outer side of the brake pedal connecting rod (7). The first diaphragm (901) is located inside the installation shell (1). A second diaphragm (902) is sleeved on the outer side of the brake pedal connecting rod (7) and below the first diaphragm (901). A first negative pressure chamber (909) is formed between the first diaphragm (901) and the second diaphragm (902). A second negative pressure chamber (910) is formed between the bottom of the second diaphragm (902) and the inner cavity of the installation shell (1). Two second extrusion blocks (911) are fixedly installed on the outer side of the brake pedal connecting rod (7) and below the first diaphragm (901) and the second diaphragm (902).

2. The dual-diaphragm through-vacuum booster according to claim 1, wherein: A first spring (906) is sleeved on the outer side of the brake pedal connecting rod (7) and at the bottom of the first diaphragm (901). The bottom of the first spring (906) contacts the top of the second diaphragm (902). A second spring (908) is sleeved on the outer side of the brake pedal connecting rod (7) and at the bottom of the second diaphragm (902). The bottom of the second spring (908) contacts the bottom of the inner cavity of the installation shell (1).

3. The dual-diaphragm through-vacuum booster according to claim 1, characterized in that: A second sealing piece (904) is fixedly installed at the top of the first diaphragm (901). A second sealing plug (905) is sleeved on the outer side of the brake pedal connecting rod (7) and on the top of the second sealing piece (904).

4. The dual-diaphragm through-vacuum booster according to claim 1, wherein: A first sealing piece (907) is fixedly installed at the top of the second diaphragm (902). A first sealing plug (903) is sleeved on the outer side of the brake pedal connecting rod (7) and on the top of the first sealing piece (907).

5. The double-diaphragm through-vacuum booster according to claim 1, wherein: A vacuum extraction interface (3) is communicated with the right side of the bottom of the installation shell (1). A pressure sensor (4) is embedded in the bottom of the installation shell (1) and in front of the vacuum extraction interface (3).

6. The dual-diaphragm through-vacuum booster according to claim 1, wherein: A first sealing gasket (10) is placed on the top of the installation shell (1). The top of the first sealing gasket (10) contacts the bottom of the sealing cover (2).

7. The dual-diaphragm through-vacuum booster according to claim 1, wherein: A sealing plate (13) is arranged on the outer side of the brake pedal connecting rod (7) and inside the mounting cover (6). A third spring (14) is sleeved on the outer side of the brake pedal connecting rod (7) at the bottom of the sealing plate (13). The bottom of the third spring (14) contacts the top of the first diaphragm (901). Two first extrusion blocks (11) are fixedly installed on the outer side of the brake pedal connecting rod (7) and at the top of the sealing plate (13).

8. The dual-diaphragm through-vacuum booster according to claim 1, characterized in that: A second sealing gasket (12) is placed on the inner side of the mounting cover (6). The bottom of the second sealing gasket (12) contacts the top of the sealing plate (13).

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