A sealing mechanism for high-pressure detection of the TMC master cylinder

Abstract

The present invention relates to a sealing mechanism for high-pressure detection of a TMC master cylinder, which includes a reference table surface, a ventilation pull rod, a positioning sliding sleeve, a limit sleeve, a sealing member, and a ventilation pressure head. The positioning sliding sleeve, the limit sleeve, and the sealing member are sequentially sleeved on the ventilation pull rod from bottom to top. The ventilation pressure head is fixedly arranged at the upper end of the ventilation pull rod. A positioning component for fixedly supporting the TMC master cylinder is arranged on the upper part of the reference table surface. The positioning sliding sleeve is fixedly installed at the lower end of the reference table surface. The lower end of the ventilation pull rod is connected to a driving mechanism, and the ventilation pull rod moves up and down in the positioning sliding sleeve and the limit sleeve under the action of the driving mechanism. Compared with the prior art, the present invention realizes the sealing of the TMC master cylinder from bottom to top and from inside to outside, which can ensure complete sealing and solve the problems that in the prior art, when the end face of the master cylinder is pressed onto the table surface for sealing, a large pressure is required and the sealing is not firm.

Description

Technical Field

[0001] The present invention relates to a sealing mechanism, and particularly to a sealing mechanism for high-pressure detection of a TMC master cylinder. Background Art

[0002] The TMC master cylinder is a casting. After the product is manufactured, high-pressure detection is required to detect whether there are defects in the product. During high-pressure detection, the master cylinder needs to be completely sealed, and then high-pressure gas is injected for detection. When performing high-pressure detection on the TMC master cylinder, the detection pressure is as high as 200 bar. Currently, the sealing method is to directly press the end face of the master cylinder onto the table for sealing. This sealing method requires a large pressure, and since the end face of the master cylinder is not machined, it is not easy to completely seal, and air leakage is very likely to occur, which brings great inconvenience to the testing process.

[0003] Patent CN206431071U discloses a casting defect detection device, including a workbench. Walkways are provided on the lower sides of both the workbench and the transport vehicle, and a fixture is installed on the upper surface of the transport vehicle. Small wheels are installed at the bottom of the transport vehicle, and the small wheels are placed on the walkways. A detector is installed on the upper surface of the workbench, and an X-ray tube is provided inside the detector. A small fan and a high-voltage generator are respectively installed at both ends of the X-ray tube, and the high-voltage generator is electrically connected to the X-ray tube through a wire. Heat dissipation holes and a cathode cover are respectively provided at both ends of the detector, and a wiring seat is fixed between the cathode cover and the high-voltage generator. A controller is provided on one side of the workbench, and a display screen and control buttons are installed on the controller. This patent uses X-rays to detect castings, the device cost is relatively high, and it is not suitable for the TMC master cylinder. Patent CN205909980U discloses an inspection device for helium inspection of an ultra-high pressure casting shell, which is applicable to the inspection of the internal cavity helium pressure of a metal casting shell, but cannot solve the problem of good sealing of the TMC master cylinder in this application. Summary of the Invention

[0004] The purpose of the present invention is to provide a sealing mechanism for high-pressure detection of a TMC master cylinder to solve the above problems.

[0005] The purpose of the present invention is achieved through the following technical solutions:

[0006] A sealing mechanism for high-pressure detection of a TMC master cylinder includes a reference tabletop and also includes a sealing and ventilation unit.

[0007] The sealing and ventilation unit includes a ventilation pull rod, a positioning sliding sleeve, a limit sleeve, a sealing member, and a ventilation pressure head. The positioning sliding sleeve, the limit sleeve, and the sealing member are sleeved on the ventilation pull rod in sequence from bottom to top, and the ventilation pressure head is fixedly provided at the upper end of the ventilation pull rod.

[0008] The upper part of the reference tabletop is provided with a positioning component for fixedly supporting the TMC master cylinder, and the positioning sliding sleeve is fixedly installed at the lower end of the reference tabletop.

[0009] The lower end of the ventilation pull rod is connected to a driving mechanism, and the ventilation pull rod moves up and down in the positioning sliding sleeve and the limit sleeve under the action of the driving mechanism.

[0010] The TMC master cylinder to be tested is installed on the positioning component. The upper end of the ventilation pull rod extends into the TMC master cylinder. The ventilation pull rod and the ventilation pressure head move downward together, squeezing the seal. The seal deforms and expands to seal the open end of the TMC master cylinder.

[0011] Further, the positioning component includes a support block and a support plate provided on the upper part of the support block. The upper part of the support plate is provided with positioning pins matching the TMC master cylinder.

[0012] Further, the support block is square-shaped, and a through hole is provided between the support block and the support plate. The upper part of the sealed ventilation unit passes through this through hole.

[0013] Further, the lower end of the ventilation pull rod is connected to a cylinder.

[0014] Further, the cylinder is provided at the lower end of the reference tabletop through a cylinder mounting plate assembly.

[0015] Further, the cylinder mounting plate assembly includes a top plate, a bottom plate, and side guard plates connected between the top plate and the bottom plate. The cylinder is connected to the lower end of the bottom plate, and the upper end of the cylinder output shaft is connected to the ventilation pull rod.

[0016] Further, a ventilation pipe is provided inside the ventilation pull rod. The ventilation pressure head is provided with an air outlet communicating with the ventilation pipe inside the ventilation pull rod. The ventilation pressure head is threadedly connected to the upper end of the ventilation pull rod, and the ventilation pull rod is connected to an external high-pressure air source through a pipeline.

[0017] Further, the ventilation pull rod consists of a thin upper end and a thick lower end. The positioning sliding sleeve is in a flange shape, the limit sleeve is in a funnel shape, the upper end of the limit sleeve is thin and the lower end is thick, the lower end has the same diameter as the positioning sliding sleeve, and the upper end has the same diameter as the sealing ring and the ventilation pressure head.

[0018] Further, a cutting fluid flow outlet for the TMC master cylinder is also provided at the lower end of the positioning sliding sleeve, facilitating the outflow of cutting fluid after the master cylinder is processed.

[0019] Further, the seal is a circular ring-shaped seal with a thickness, and is made of a material with easy deformability.

[0020] The specific working principle of the sealing mechanism of the present invention is as follows: by setting up a sealing and venting unit, the sealing of the TMC master cylinder is achieved from the bottom upwards and from the inside outwards, ensuring complete sealing. The specific process is as follows: the TMC master cylinder to be tested is installed on the positioning component, the lower end opening of the TMC master cylinder is inserted into the lower end of the positioning component, and the upper end of the venting pull rod of the sealing and venting unit extends into the TMC master cylinder. During the test, the lower end of the venting pull rod moves downwards under the action of the driving mechanism (cylinder). After the venting pressure head fixedly installed at the upper end of the venting pull rod contacts the sealing member, it continues to move downwards, squeezing the sealing member, and the sealing member deforms and expands to block the opening of the TMC master cylinder, sealing the opening. After the sealing is completed, high-pressure gas is introduced through the venting pull rod. After reaching a certain pressure, it is detected whether there is air leakage in the product. If there is no air leakage, the product is qualified; if there is air leakage, the product is unqualified.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] 1. A movable sealing and venting unit is set up to achieve the sealing of the TMC master cylinder from the bottom upwards and from the inside outwards, which can ensure complete sealing and solve the problems in the prior art that when the end face of the master cylinder is pressed onto the table for sealing, a large pressure is required and the sealing is not firm.

[0023] 2. By adopting the structural settings of the venting pull rod, positioning sliding sleeve, limiting sleeve, sealing member and venting pressure head, it is not only convenient to realize automatic testing, but also due to this structural setting, effective internal sealing of the opening end of the TMC master cylinder can be achieved.

[0024] 3. A positioning component for fixedly supporting the TMC master cylinder is provided on the upper part of the reference tabletop. The positioning component plays a role in positioning and height limitation, which helps to limit the stroke of the venting pull rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic structural diagram of the TMC master cylinder to be tested according to the present invention;

[0026] Figure 2 is a schematic overall structural diagram of the present invention;

[0027] Figure 3 is a schematic structural diagram of the present invention after removing the reference tabletop;

[0028] Figure 4 is Figure 3 a schematic structural diagram during the test;

[0029] Figure 5 is a schematic structural diagram from the bottom view of the present invention;

[0030] Figure 6 is a schematic front view structural diagram of the present invention;

[0031] Figure 7 is a schematic sectional view structural diagram of the present invention;

[0032] Figures 8 - 11 is a partial structural schematic diagram of the present invention;

[0033] Figure 12 is a structural schematic diagram of the ventilation pull rod of the present invention;

[0034] Figure 13 is a combined structural schematic diagram of the ventilation pull rod and the TMC master cylinder of the present invention;

[0035] Figure 14 is a structural schematic diagram of the cylinder mounting plate assembly of the present invention;

[0036] Figure 15 is a structural schematic diagram of the positioning sliding sleeve of the present invention;

[0037] In the figure: TMC master cylinder 1, support plate 2, support block 3, reference tabletop 4, cylinder mounting plate assembly 5, cylinder 6, ventilation pull rod 7, positioning sliding sleeve 8, limit sleeve 9, seal 10, ventilation pressure head 11, cutting fluid outlet 12. Detailed implementation manners

[0038] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] Embodiment

[0040] Figure 1 is the TMC master cylinder to be detected by the present invention. As Figures 2 - 7 , the present invention provides a sealing mechanism for high-pressure detection of a TMC master cylinder, including a reference tabletop 4, and further including a sealed ventilation unit. The sealed ventilation unit includes a ventilation pull rod 7, a positioning sliding sleeve 8, a limit sleeve 9, a seal 10, and a ventilation pressure head 11. The positioning sliding sleeve 8, the limit sleeve 9, and the seal 10 are sleeved on the ventilation pull rod 7 in sequence from bottom to top. The ventilation pressure head 11 is fixedly arranged at the upper end of the ventilation pull rod 7. A positioning component for fixedly supporting the TMC master cylinder 1 is arranged on the upper part of the reference tabletop 4. The positioning sliding sleeve 8 is fixedly installed at the lower end of the reference tabletop 4. The lower end of the ventilation pull rod 7 is connected to a driving mechanism, and the ventilation pull rod 7 moves up and down in the positioning sliding sleeve 8 and the limit sleeve 9 under the action of the driving mechanism.

[0041] The positioning component includes a support block 3 and a support plate 2 arranged on the upper part of the support block 3. A positioning pin matching the TMC master cylinder 1 is arranged on the upper part of the support plate 2. The support block 3 is square-shaped, and a through hole is arranged between the support block 3 and the support plate 2. The upper part of the sealed ventilation unit passes through this through hole. As Figures 8 - 11 , the lower end of the ventilation pull rod 7 is connected to a cylinder 6. The cylinder is arranged at the lower end of the reference tabletop 4 through a cylinder mounting plate assembly 5. As Figure 14, the cylinder mounting plate assembly 5 includes a top plate, a bottom plate, and side guard plates connected between the top plate and the bottom plate. The cylinder 6 is connected to the lower end of the bottom plate, and the upper end of the output shaft of the cylinder 6 is connected to the ventilation pull rod 7. A ventilation pipe is provided inside the ventilation pull rod 7, and the ventilation pressure head 11 is provided with an air outlet communicating with the ventilation pipe inside the ventilation pull rod 7. The ventilation pressure head 11 is threadedly connected to the upper end of the ventilation pull rod 7, and the ventilation pull rod 7 is connected to an external high-pressure air source through a pipeline. As Figure 12 , the ventilation pull rod 7 consists of a thin upper end and a thick lower end. As Figure 15 , the positioning sliding sleeve 8 is in a flange shape, and the limiting sleeve 9 is in a funnel shape. The upper end of the limiting sleeve 9 is thin and the lower end is thick, and the lower end has the same diameter as the positioning sliding sleeve 8, and the upper end has the same diameter as the sealing ring and the ventilation pressure head 11. A TMC master cylinder cutting fluid outlet 12 is also provided at the lower end of the positioning sliding sleeve 8 to facilitate the outflow of the cutting fluid after the machining of the master cylinder. The seal 10 is a circular seal 10 with a thickness and is made of rubber.

[0042] The specific usage process is as follows. As Figure 13 , the TMC master cylinder 1 to be tested is installed on the positioning assembly. The lower opening of the TMC master cylinder 1 is inserted into the lower end of the positioning assembly, and the upper end of the ventilation pull rod 7 of the sealed ventilation unit extends into the TMC master cylinder 1. During the test, the lower end of the ventilation pull rod 7 moves downward under the action of the cylinder 6. After the ventilation pressure head 11 fixedly installed at the upper end of the ventilation pull rod 7 contacts the seal 10, it continues to move downward, squeezing the seal 10. The seal 10 deforms and expands to block the opening of the TMC master cylinder 1, sealing the opening. After the sealing is completed, high-pressure gas is introduced through the ventilation pull rod 7. After reaching a certain pressure, it is detected whether the product has a leakage phenomenon. If there is no leakage, the product is qualified; if there is leakage, the product is unqualified.

[0043] The above description of the embodiments is for the convenience of those of ordinary skill in the art to understand and use the invention. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative labor. Therefore, the present invention is not limited to the above embodiments, and the improvements and modifications made by those skilled in the art without departing from the scope of the present invention according to the disclosure of the present invention should be within the protection scope of the present invention.

Claims

1. A sealing mechanism for high-pressure detection of a TMC master cylinder, comprising a reference tabletop (4), characterized in that, it further comprises a sealing and ventilation unit, the sealing and ventilation unit includes a ventilation pull rod (7), a positioning sliding sleeve (8), a limit sleeve (9), a sealing member (10) and a ventilation pressure head (11). The positioning sliding sleeve (8), the limit sleeve (9) and the sealing member (10) are sleeved on the ventilation pull rod (7) in sequence from bottom to top. The ventilation pressure head (11) is fixedly arranged at the upper end of the ventilation pull rod (7). An upper part of the reference tabletop (4) is provided with a positioning assembly for fixedly supporting the TMC master cylinder (1). The positioning sliding sleeve (8) is fixedly installed at the lower end of the reference tabletop (4). The positioning assembly includes a support block (3) and a support plate (2) arranged on the upper part of the support block (3). A positioning pin matching the TMC master cylinder (1) is arranged on the upper part of the support plate (2). A through hole is arranged between the support block (3) and the support plate (2). The upper part of the sealing and ventilation unit passes through this through hole. The lower end of the ventilation pull rod (7) is connected to a cylinder (6). The cylinder (6) is arranged at the lower end of the reference tabletop (4) through a cylinder mounting plate assembly (5). The cylinder mounting plate assembly (5) includes a top plate, a bottom plate and side guard plates connected between the top plate and the bottom plate. The cylinder (6) is connected to the lower end of the bottom plate. The upper end of the output shaft of the cylinder (6) is connected to the ventilation pull rod (7). The ventilation pull rod (7) moves up and down in the positioning sliding sleeve (8) and the limit sleeve (9) under the action of the cylinder (6). A TMC master cylinder cutting fluid outlet (12) is further arranged at the lower end of the positioning sliding sleeve (8). The sealing and detection process of the TMC master cylinder (1) is as follows: The TMC master cylinder (1) to be tested is installed on the positioning assembly. The upper end of the ventilation pull rod (7) extends into the TMC master cylinder (1). The ventilation pull rod (7) together with the ventilation pressure head (11) moves downward to squeeze the sealing member (10). The sealing member (10) deforms and expands to seal the open end of the TMC master cylinder (1). High-pressure gas is introduced through the ventilation pull rod (7). After reaching a certain pressure, it is detected whether the product has air leakage. If there is no air leakage, the product is qualified. If there is air leakage, the product is unqualified.

2. A sealing mechanism for high-pressure detection of a TMC master cylinder according to claim 1, characterized in that, the support block (3) is square.

3. A sealing mechanism for high-pressure detection of a TMC master cylinder according to claim 1, characterized in that, a ventilation pipe is arranged inside the ventilation pull rod (7). The ventilation pressure head (11) is provided with an air outlet communicating with the ventilation pipe inside the ventilation pull rod (7). The ventilation pressure head (11) is connected to the upper end of the ventilation pull rod (7) by thread. The ventilation pull rod (7) is connected to an external high-pressure gas source through a pipeline.

4. A sealing mechanism for high-pressure detection of a TMC master cylinder according to claim 1, characterized in that, The ventilation pull rod (7) consists of a thin upper end and a thick lower end. The positioning sliding sleeve (8) is in a flange shape, and the limiting sleeve (9) is in a funnel shape. The upper end of the limiting sleeve (9) is thin and the lower end is thick, and the diameter of the lower end is the same as that of the positioning sliding sleeve (8), and the diameter of the upper end is the same as that of the sealing ring and the ventilation pressure head (11).

5. A sealing mechanism for high-pressure detection of a TMC master cylinder according to claim 1, characterized in that, the sealing member (10) is an annular sealing member (10) with a thickness and is made of a deformable material.

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