Vacuum booster shell airtightness detection tool

Abstract

The utility model discloses a vacuum booster housing airtightness detection tool comprising a support plate, the middle part of the support plate is provided with a through hole, the through hole is internally provided with a ventilation screw, and the lower end of the ventilation screw is located below the support plate; a supporting column is fixed to the supporting plate, the lower end of the supporting column is fixed to the supporting plate, an air cylinder plate is installed at the upper end of the supporting column and is parallel to the supporting plate, an air cylinder assembly is installed on the air cylinder plate, a piston rod of the air cylinder assembly faces the ventilation screw, and a sealing plug is installed on the piston rod of the air cylinder assembly. A sealing gasket is arranged on the supporting plate and located on the periphery of the upper end of the ventilation screw. A mounting base is arranged on the supporting plate, a negative pressure sensing device is mounted on the mounting base, a displayer is mounted on the air cylinder plate, and the negative pressure sensing device is electrically connected with the displayer through a controller. The air tightness of the shell of the vacuum booster can be controlled, and the product percent of pass and the production efficiency are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of vacuum booster shell airtightness detection tool, belong to mechanical equipment technical field. BACKGROUND

[0002] Vacuum booster is through vacuum pressure difference formed by booster inside front and back cavity, is the function part of providing servo force to amplify the treading force of driver to pedal, so the sealing performance of vacuum booster is the most critical performance when it works, we must strictly control its sealing performance.Vacuum booster airtightness detection, mainly through the detection of its shell, therefore, provide a kind of vacuum booster shell airtightness detection tool called the technical problem to be solved in the field. SUMMARY

[0003] The utility model discloses a kind of vacuum booster shell airtightness detection tool, can be aimed at the airtightness control of vacuum booster shell, improve product pass rate and production efficiency.

[0004] To solve the above technical problems, the utility model adopts the following technical scheme:

[0005] A kind of vacuum booster shell airtightness detection tool, including support plate, the middle part of support plate has perforation, the air screw is installed in the perforation, the lower end of air screw is located below support plate;Support plate is fixed with support column, the lower end of support column is fixed on support plate, the upper end of support column is installed with cylinder plate, cylinder plate and support plate are parallel to each other, air cylinder assembly is installed on cylinder plate, the piston rod of air cylinder assembly is towards the air screw, sealing plug is installed on the piston rod of air cylinder assembly;Sealing gasket is provided on support plate, and sealing gasket is located around the upper end of air screw;Mounting seat is provided on support plate, negative pressure sensing device is installed on mounting seat, display is installed on cylinder plate, negative pressure sensing device is electrically connected through controller and display.

[0006] In the foregoing vacuum booster shell airtightness detection tool, the lower part of support plate is installed with support column, support column is fixed on support plate, the number of support column is four, and support column is located around air screw;Gasket is provided between mounting seat and sealing gasket.

[0007] In the foregoing vacuum booster shell airtightness detection tool, at least three positioning supports are fixed on support plate, positioning rod is provided on positioning support, positioning rod is arranged on positioning support by thread, positioning rod is horizontally arranged, and positioning rod is towards the air screw.

[0008] The lower part of the support plate is fixed with a nut, and the air screw is fixed on the support plate through the nut.

[0009] Compared with the prior art, the vacuum booster shell air tightness detection tool can control the air tightness of the vacuum booster shell, improve the product qualification rate and production efficiency. By detecting the air tightness of the shell, it can effectively detect whether the sealing performance of the shell is good after stamping and riveting screw in the production process. Whether the shell is broken or the screw is not riveted well to cause air leakage can be accurately judged. When static air leakage occurs during the assembly of the vacuum booster, it is judged whether the shell part of the booster is the key problem causing air leakage, which greatly improves the quality, problem piece inspection and rework efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 is a structure schematic diagram of an embodiment of the utility model;

[0011] Figure 2 is a perspective view of an embodiment of the utility model;

[0012] Figure 3 is a structure schematic diagram of the air screw.

[0013] Reference signs: 1-air screw, 2-nut, 3-gasket, 4-cylinder support, 5-first round head screw, 6-cylinder plate, 7-second round head screw, 8-cylinder assembly, 9-display, 10-sealing plug, 11-sealing gasket, 12-support plate, 13-positioning support, 14-positioning rod, 15-support column.

[0014] The utility model will be further described below in combination with the drawings and specific embodiments. DETAILED DESCRIPTION

[0015] The utility model discloses an embodiment 1: a vacuum booster casing airtightness detection frock, including support plate 12, the middle part of support plate 12 has the perforation, install the vent screw 1 in the perforation, the lower end of vent screw 1 is located below support plate 12, be fixed with the support column 4 on support plate 12, the lower end of support column 4 is fixed on support plate 12, and the upper end of support column 4 is installed with cylinder plate 6, and cylinder plate 6 and support plate 12 are parallel to each other, and install cylinder assembly 8 on cylinder plate 6, and the piston rod of cylinder assembly 8 is towards the vent screw 1, and install sealing plug 10 on the piston rod of cylinder assembly 8, be provided with sealing washer 11 on support plate 12, and sealing washer 11 is located around the upper end of vent screw 1, be provided with mounting seat on support plate 12, install negative pressure sensing device on mounting seat, install display 9 on cylinder plate 6, and negative pressure sensing device is electrically connected through controller and display 9.

[0016] The lower part of the support plate 12 is provided with a supporting column 15, the supporting column 15 is fixed on the support plate 12, the number of the supporting column 15 is four, and the supporting column 15 is located around the vent screw 1.

[0017] The utility model discloses an embodiment 1: a vacuum booster casing airtightness detection frock, including support plate 12, the middle part of support plate 12 has the perforation, install the vent screw 1 in the perforation, the lower end of vent screw 1 is located below support plate 12, be fixed with the support column 4 on support plate 12, the lower end of support column 4 is fixed on support plate 12, and the upper end of support column 4 is installed with cylinder plate 6, and cylinder plate 6 and support plate 12 are parallel to each other, and install cylinder assembly 8 on cylinder plate 6, and the piston rod of cylinder assembly 8 is towards the vent screw 1, and install sealing plug 10 on the piston rod of cylinder assembly 8, be provided with sealing washer 11 on support plate 12, and sealing washer 11 is located around the upper end of vent screw 1, be provided with mounting seat on support plate 12, install negative pressure sensing device on mounting seat, install display 9 on cylinder plate 6, and negative pressure sensing device is electrically connected through controller and display 9.

[0018] The lower part of the support plate 12 is provided with a supporting column 15, the supporting column 15 is fixed on the support plate 12, the number of the supporting column 15 is four, and the supporting column 15 is located around the vent screw 1.

[0019] The utility model discloses an embodiment's working principle: the edge of platform is distributed 3 quick positioning rod 14, is used for fixing vacuum booster casing in support plate 12, and support plate 12 spreads a layer of rubber pad and carries out sealing gasket 11 (open in the middle for connecting vacuum source), and the top of the ram is fixed together with sealing plug 10 on the top of platform design a cylinder assembly 8, when starting detection, starting switch, cylinder assembly 8 will sealing plug 10 press down contact casing hole and press tightly seal, and because sealing plug 10 is pressed down, the casing outer circle is pressed tightly sealed with platform rubber sealing gasket 11, at this time, the vacuum generator and vent screw 1 below are communicated and start to draw vacuum to 66.7KPa and keep, and vacuum source stops drawing vacuum, and negative pressure sensing device detects the vacuum degree in casing, and then shows vacuum reading through display, and the specific value of vacuum degree drop in 10S is observed, to determine whether product exists air leakage.

Claims

1. A vacuum booster shell airtightness detection tool characterized by, Including support plate (12), the middle part of support plate (12) has a perforation, a breather screw (1) is mounted in the perforation, and the lower end of the breather screw (1) is located below the support plate (12); The support plate (12) is fixed with a support column (4), the lower end of the support column (4) is fixed on the support plate (12), and the upper end of the support column (4) is provided with a cylinder plate (6), the cylinder plate (6) and the support plate (12) are parallel to each other, the cylinder plate (6) is provided with a cylinder assembly (8), the piston rod of the cylinder assembly (8) faces the breather screw (1), and the piston rod of the cylinder assembly (8) is provided with a sealing plug (10); The support plate (12) is provided with a sealing gasket (11), and the sealing gasket (11) is located around the upper end of the breather screw (1); The support plate (12) is provided with a mounting seat, a negative pressure sensing device is mounted on the mounting seat, a display (9) is mounted on the cylinder plate (6), and the negative pressure sensing device is electrically connected with the display (9) through a controller.

2. The vacuum booster shell air tightness detection tool of claim 1, wherein, The lower part of the support plate (12) is provided with a support column (15), the support column (15) is fixed on the support plate (12), the number of the support column (15) is four, and the support column (15) is located around the breather screw (1);A gasket (3) is arranged between the mounting seat and the sealing gasket (11).

3. The vacuum booster shell air tightness detection tool of claim 2, wherein, The support plate (12) is fixed with at least three positioning supports (13), the positioning supports (13) are provided with positioning rods (14), the positioning rods (14) are arranged on the positioning supports (13) through threads, the positioning rods (14) are horizontally arranged, and the positioning rods (14) face the breather screw (1).

4. The vacuum booster shell air tightness detection tool of claim 3, wherein, The lower part of the support plate (12) is fixed with a nut (2), the breather screw (1) is fixed on the support plate (12) through the nut (2);The cylinder plate (6) is fixed on the support column (4) through a first round head screw (5), and the cylinder assembly (8) is fixed on the cylinder plate (6) through a second round head screw (7).

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