Sealing and pressurizing device for brake liquid storage tank

Abstract

The utility model provides a sealing and pressurizing device for a brake liquid storage tank, which is characterized in that a base body is arranged at the bottom of a fixed base, a tubular part is arranged at the center of the base body, a fixed stud is mounted in a sealing screw cap in a threaded connection manner, and the lower section of the tubular part of the fixed base is sleeved with the fixed stud; a fastening screw cap is arranged above the sealing screw cap and is in threaded connection with the upper section of the tubular part of the fixed base, and the fastening screw cap is rotated to enable the fixed base to move upwards, so that the lower end face of the fastening screw cap abuts against the upper end face of the fixed stud, and then the lower end face of the fixed stud abuts against the upper end face of the base body and is sealed; the pressurizing guide pipe is fixedly connected and communicated with the fixed base in a threaded mode, and the bottom of the sealing screw cap and a tank opening of the brake liquid storage tank are clamped, fixed and sealed; according to the device, pressurization and sealing of the brake liquid storage tank can be realized, the test efficiency is improved, the test accuracy is ensured, the test requirements of the brake liquid storage tanks with different sizes and structures can be met by replacing the sealing screw cap, and the flexibility and the universality are high.

Description

Technical Field

[0001] The utility model belongs to the field of brake fluid storage tank sealing test in the development of passenger car brake system, and relates to a brake fluid storage tank sealing pressurizing device. Background Art

[0002] The vehicle brake fluid reservoir is usually installed above the brake master cylinder and communicates with the working chamber of the brake master cylinder. The entire system is filled with brake fluid before braking. When the system brake fluid is insufficient, it can be supplemented through the reservoir. The reservoir cover is generally equipped with a liquid level alarm switch. When the liquid level is too low, the alarm switch will light up the brake warning light in the instrument panel to remind the driver to check and replenish the brake fluid. For the braking system, the brake reservoir provides liquid level replenishment for the entire brake hydraulic pipeline. The conventional brake pedal force needs to be amplified by the booster to push the brake master cylinder piston, thereby generating brake pressure in the hydraulic pipeline. The pipeline hydraulic pressure acts on the brake pad through the brake wheel cylinder, and the brake pad and the brake disc generate friction to achieve braking action. Therefore, the brake reservoir should meet the performance requirements of various benches and need to be strictly tested. The main test items include brake pressurization performance, tank wall compressive strength, tank body sealing performance, etc.

[0003] During the brake fluid reservoir test, the brake master cylinder needs to be fixed on the test bench according to the vehicle installation status. When the tank strength and sealing test is performed, the reservoir needs to be sealed and a certain pressure needs to be applied from the tank mouth. At this time, a special device needs to be installed to meet this requirement. This device needs to be fixed at the tank mouth as required. It must not only be able to achieve the sealing function, but also be connected to the external pressure source pipeline. It must be easy to install and replace, and have strong versatility. The tooling currently used is a split structure, which uses bolts for clamping and sealing. It is necessary to add sealing strips, and it is easy to leak air and liquid when pressurized. Its versatility is not high. When the size of the tank mouth is changed, the original tooling is no longer applicable, which is time-consuming and labor-intensive, and the cost is relatively high. Utility Model Content

[0004] In order to overcome the problems existing in the prior art, the utility model provides a sealing and pressurizing device for a brake fluid storage tank.

[0005] The utility model is realized by adopting the following technical solutions:

[0006] A brake fluid reservoir sealing and pressurizing device is used to seal and pressurize the tank mouth of the brake fluid reservoir, comprising a fixed base of a rotating body structure, the bottom of the fixed base is a base body of a conical platform structure with a central through hole, the center of the base body is provided with a tubular portion which is vertically arranged upward and is integrated with the base body and communicated with the central through hole of the base body, a fixed stud of the rotating body structure is threadedly installed in a sealing nut cover, the fixed stud is sleeved on the lower section of the tubular portion of the fixed base, and a fastening nut is provided above the sealing nut cover to be fastened to the upper section of the tubular portion of the fixed base The screw thread connection is connected by a threaded section, and the fastening nut is rotated to move the fixed base upward so that the lower end surface of the fastening nut is pressed against the upper end surface of the fixing stud, and then the lower end surface of the fixing stud is pressed against the upper end surface of the base body of the fixed base and sealed. The lower end pipe mouth of a pressurizing conduit is threadedly connected and fixed with the upper end pipe mouth of the tubular portion of the fixed base, so that the pressurizing conduit is connected with the fixed base. The bottom of the sealing nut is clamped and fixed to the tank mouth of the brake reservoir tank to be tested in the vertical direction and sealed. The base body of the fixed base is located in the tank mouth of the brake reservoir tank to be tested and is connected with the tank mouth of the brake reservoir tank to be tested.

[0007] Further technical solutions include:

[0008] The sealing nut cover is a rotating body structure with a two-stage stepped inner hole, and the fixing stud is a two-stage rotating body structure with an upper diameter smaller than a lower diameter. The center of the fixing stud has a through hole that runs through the height of the fixing stud, and the lower hole diameter of the sealing nut cover is larger than the lower diameter of the fixing stud. The upper inner hole of the sealing nut cover has an internal thread, and the upper section of the fixing stud has an external thread. The sealing nut cover and the fixing stud are threadedly connected, and the fixing stud is mounted on the tubular portion of the fixed base through the through hole.

[0009] The fastening nut is a two-section rotating body structure with an upper diameter larger than a lower diameter. The center of the fastening nut has an internal threaded hole with an internal thread that runs through the height of the fastening nut. The upper section of the tubular portion of the fixed base has an external thread, and the fastening nut is threadedly connected to the fixed base.

[0010] The top pipe opening of the tubular part of the fixed base is provided with an internal thread, the lower end of the pressurizing conduit is provided with an external thread, and the pressurizing conduit is threadedly connected with the top pipe opening of the tubular part of the fixed base.

[0011] The upper end surface of the base body of the fixed base is provided with an annular platform with an outer diameter smaller than the upper end surface diameter of the base body, a base sealing ring is mounted on the annular platform, and the lower end surface of the lower section of the fixed stud is provided with an annular groove for accommodating the base sealing ring. When the fixed stud moves downward and is pressed against the base body of the fixed base, the base sealing ring is located in the annular platform of the base body and the annular groove of the fixed stud, thereby sealing the fixed stud and the base body of the fixed base.

[0012] The hole wall of the lower inner hole of the sealing screw cover is provided with a plurality of claws extending inwards and spaced evenly along the circumferential direction. The outer wall of the tank mouth of the brake fluid reservoir tank to be tested is provided with an annular clamping ring, and the clamping ring is provided with clamping grooves corresponding to the claws one by one. There is a gap between the claws and the step portion between the lower inner hole and the upper inner hole of the sealing screw cover for accommodating the clamping ring of the tank mouth of the brake fluid reservoir tank to be tested. When the sealing screw cover is engaged with the tank mouth of the brake fluid reservoir tank to be tested, after the claws correspond to the clamping grooves on the clamping ring one by one, the sealing screw cover is pressed downward and rotated so that the claws are clamped on the clamping ring, thereby engaging the tank mouth of the brake fluid reservoir tank with the sealing screw cover.

[0013] There is a screw cover sealing gasket above the claw of the sealing screw cover and is located in the inner hole of the lower section of the sealing screw cover. After the sealing screw cover is clamped with the tank mouth of the brake fluid reservoir tank to be tested, the screw cover sealing gasket is located between the tank mouth of the brake fluid reservoir tank to be tested and the step portion of the sealing screw cover, thereby sealing the sealing screw cover and the tank mouth of the brake fluid reservoir tank to be tested.

[0014] The upper end of the outer surface of the upper section of the fixing stud is provided with a plurality of vertically arranged strip grooves evenly distributed along the circumferential direction, so as to cooperate with a tool to screw the fixing stud and connect and tighten the fixing stud with the sealing nut cover.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The utility model provides a brake fluid reservoir sealing and pressurizing device, which comprises a pressurizing conduit, a fastening nut, a sealing screw cover, a fixing stud, a screw cover sealing gasket, a fixing base and a base sealing ring. The device is connected through a pressurizing conduit and a tubular portion of a fixing base through a thread, the fastening nut is connected to the tubular portion of the fixing base through an internal thread structure, the fixing stud is connected to the sealing screw cover through an external thread, a through hole is used in the middle of the fixing stud to be slidably connected to the tubular portion of the fixing base, the screw cover sealing gasket is installed inside the sealing screw cover to achieve sealing of the sealing screw cover and the brake fluid reservoir opening; the base sealing ring is installed at the step of the fixing base to achieve sealing of the fixing base and the fixing stud.

[0017] It can be seen from the above technical scheme that the brake fluid tank sealing and pressurizing device provided by the utility model can realize the pressurization and sealing of the tank mouth of the brake fluid tank during the brake fluid tank pressurization test, improve the test efficiency and ensure the accuracy of the test, and can meet the testing needs of brake fluid tanks of different sizes and structures by replacing the sealing screw cover. It has high flexibility and strong versatility, and can significantly improve the test efficiency. This device can meet the test needs of different vehicle models at the same time, and can effectively save test costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described below in conjunction with the accompanying drawings:

[0019] Figure 1The utility model is a front view of a brake fluid storage tank sealing and pressurizing device.

[0020] Figure 2 for Figure 1 AA section view.

[0021] Figure 3 The utility model provides an exploded view of a brake fluid storage tank sealing and pressurizing device.

[0022] Figure 4 The present invention is a schematic structural diagram of a brake fluid reservoir matched with a brake fluid reservoir sealing and pressurizing device provided by the utility model.

[0023] Figure 5 The utility model is a schematic diagram of a brake fluid storage tank sealing and pressurizing device and a tank opening of the brake fluid storage tank after being assembled together.

[0024] Figure 6 for Figure 5 BB section view.

[0025] In the figure: 1. pressurized conduit, 2. fastening nut, 3. sealing screw cover, 4. fixing stud, 5. screw cover sealing gasket, 6. fixing base, 7. base sealing ring, 8. brake fluid reservoir, 9. claw, 10. retaining ring, 11. slot, 12. strip groove. DETAILED DESCRIPTION

[0026] The utility model is described in detail below in conjunction with the accompanying drawings:

[0027] The utility model provides a brake fluid reservoir sealing and pressurizing device, which is used to seal and pressurize the tank opening of the brake fluid reservoir 8. Figures 1 to 3As shown, it includes a fixed base 6 of a swivel structure, the bottom of the fixed base 6 is a base body of a conical structure with a central through hole, the center of the base body has a tubular portion vertically arranged upwards and integrated with the base body and connected to the central through hole of the base body, a fixed stud 4 of a swivel structure is threadedly installed in a sealing nut 3, the fixed stud 4 is sleeved on the lower section of the tubular portion of the fixed base 6, and a fastening nut 2 is threadedly connected to the upper section of the tubular portion of the fixed base 6 above the sealing nut 3, and the fastening nut 2 is rotated to fix the fixed base 6 moves upward so that the lower end surface of the fastening nut 2 is pressed against the upper end surface of the fixing stud 4, and then the lower end surface of the fixing stud 4 is pressed against the upper end surface of the base body of the fixing base 6 and sealed. The lower end pipe mouth of a pressurizing conduit 1 is threadedly connected and fixed with the upper end pipe mouth of the tubular portion of the fixing base 6, so that the pressurizing conduit 1 is communicated with the fixing base 6. The bottom of the sealing nut 3 is clamped and fixed with the tank mouth of the brake reservoir tank 8 to be tested in the vertical direction and sealed. The base body of the fixing base 6 is located in the tank mouth of the brake reservoir tank 8 to be tested and is communicated with the tank mouth of the brake reservoir tank 8 to be tested.

[0028] In this embodiment, Figures 1 to 3 As shown, the sealing nut cover 3 is a rotating body structure with a two-stage stepped inner hole, the fixing stud 4 is a two-stage rotating body structure with an upper diameter smaller than a lower diameter, the center of the fixing stud 4 has a through hole that runs through the height of the fixing stud 4, the lower section of the sealing nut cover 3 has a larger aperture than the lower section of the fixing stud 4, the upper section of the sealing nut cover 3 has an inner thread, the upper section of the fixing stud 4 has an outer thread, the sealing nut cover 3 and the fixing stud 4 are threadedly connected, and the fixing stud 4 is mounted on the tubular portion of the fixing base 6 through the through hole.

[0029] In this embodiment, Figures 1 to 3 As shown, the fastening nut 2 is a two-section rotating body structure with an upper diameter larger than a lower diameter. The center of the fastening nut 2 has an internal threaded hole with an internal thread that runs through the height of the fastening nut 2. The upper section of the tubular portion of the fixed base 6 has an external thread, and the fastening nut 2 is threadedly connected to the fixed base 6.

[0030] In this embodiment, Figure 2 As shown, the top pipe opening of the tubular portion of the fixed base 6 has an internal thread, the lower end of the pressurized conduit 1 has an external thread, and the pressurized conduit 1 is threadedly connected to the top pipe opening of the tubular portion of the fixed base 6.

[0031] In this embodiment, Figures 1 to 3As shown, the upper end surface of the base body of the fixed base 6 is provided with an annular platform with an outer diameter smaller than the upper end surface diameter of the base body, a base sealing ring 7 is mounted on the annular platform, and the lower end surface of the lower section of the fixed stud 4 is provided with an annular groove for accommodating the base sealing ring 7. When the fixed stud 4 moves downward and is pressed against the base body of the fixed base 6, the base sealing ring 7 is located in the annular platform of the base body and the annular groove of the fixed stud 4, thereby sealing the fixed stud 4 and the base body of the fixed base 6.

[0032] In this embodiment, Figure 3 and Figure 6 As shown, the hole wall of the lower inner hole of the sealing screw cover 3 is provided with a plurality of claws 9 extending inwards and spaced evenly along the circumferential direction. Figure 4 and Figure 6 As shown, the outer wall of the tank opening of the brake fluid reservoir 8 to be tested has an annular clamping ring 10, such as Figure 4 As shown, there are grooves 11 on the snap ring 10 corresponding to the claws 9 one by one, and there is a gap between the claws 9 and the step portion between the lower inner hole and the upper inner hole of the sealing screw cover 3 for accommodating the snap ring 10 of the tank mouth of the brake reservoir tank 8 to be tested. When the sealing screw cover 3 is engaged with the tank mouth of the brake reservoir tank 8 to be tested, after the claws 9 correspond to the grooves 11 on the snap ring 10 one by one, the sealing screw cover 3 is pressed downward and rotated to make the claws 9 clamp on the snap ring 10, thereby making the sealing screw cover 3 engage with the tank mouth of the brake reservoir tank 8.

[0033] In this embodiment, Figure 2 , Figure 3 and Figure 6 As shown, there is a screw cover sealing gasket 5 above the claw 9 of the sealing screw cover 3 and is located in the inner hole of the lower section of the sealing screw cover 3. After the sealing screw cover 3 is engaged with the tank mouth of the brake fluid reservoir tank 8 to be tested, the screw cover sealing gasket 5 is located between the tank mouth of the brake fluid reservoir tank 8 to be tested and the step portion of the sealing screw cover 3, thereby sealing the sealing screw cover 3 and the tank mouth of the brake fluid reservoir tank 8 to be tested.

[0034] The upper end of the outer surface of the upper section of the fixing stud 4 is provided with a plurality of vertically arranged strip grooves 12 evenly distributed along the circumferential direction, so as to cooperate with a tool to screw the fixing stud 4 and connect and tighten the fixing stud 4 to the sealing nut cover 3.

[0035] The working principle of a brake fluid storage tank sealing and pressurizing device provided by the utility model is as follows:

[0036] The pressurized conduit 1 and the tubular portion of the fixed base 6 are connected by threads, the fastening nut 2 is connected to the tubular portion of the fixed base 6 by an internal thread structure, the fixing stud 4 is connected to the sealing screw cover 3 by an external thread, and the middle of the fixing stud 4 is slidingly connected to the tubular portion of the fixed base 6 by a through hole, and the screw cover sealing gasket 5 is installed inside the sealing screw cover 3 to achieve the sealing of the sealing screw cover 3 and the brake fluid reservoir tank mouth; the base sealing ring 7 is installed at the annular step above the base body of the fixed base 6 to achieve the sealing effect of the fixed base 6 and the fixing stud 4; the sealing screw cover 3 is connected by a clamping connection through the internal clamping claws 9 and the clamping ring 10 and the clamping groove 11 at the tank mouth of the brake fluid reservoir 8.

[0037] During the test, select the corresponding sealing nut 3 according to the size and interface structure of the brake fluid reservoir 8, use a tool to screw the fixing stud 4 through the strip groove on the fixing stud 4 to threadably connect the fixing stud 4 with the sealing nut 3, the tubular portion of the fixing base 6 passes through the through hole in the middle of the fixing stud 4 and is threadedly connected to the fastening nut 2, and then the pressurized conduit 1 is threadedly connected to the tubular portion of the fixing base 6 to be fastened.

[0038] The device is installed in the clamping ring 10 and the clamping groove 11 of the tank mouth of the brake fluid reservoir 8 through the claws of the sealing screw cover 3 and tightened to ensure that the screw cover sealing gasket 5 fits the tank mouth of the brake fluid reservoir 8, tighten the fastening nut 2 and press the fixing stud 4, and the fixing base 6 moves upward to make the base body of the fixing base 6 and the lower section of the fixing stud 4 press tightly, ensuring that the base sealing ring 7 is between the annular step on the base body of the fixing base 6 and the annular groove of the lower section of the fixing stud 4, so as to achieve the sealing effect between the fixing base 6 and the fixing stud 4. The pressurizing device is connected to the upper section of the pressurizing conduit 1 through a quick-insert structure to achieve the pneumatic or hydraulic pressurization function.

[0039] The fixed base 6 is processed into a through hole in the middle, which can be connected to the pressurized conduit 1 to allow the brake fluid to enter hydraulically or pneumatically. By processing a special annular step structure, not only the base sealing ring 7 is fixed, but also the sealing with the fixed stud 4 can be ensured.

[0040] The fixing stud 4 adopts an external thread and a middle through structure, which plays the role of fixing the sealing screw cover 3. The external threads at the upper end of the outer surface of the upper section of the fixing stud 4 are processed with slots of a strip groove structure evenly spaced, which is convenient for installation and disassembly with tools, and can realize the function of replacing sealing screw covers 3 of different sizes. The installation is simple and convenient, and the versatility is relatively strong.

[0041] The upper section of the pressurizing catheter 1 adopts a quick-insert structure, which can be very conveniently connected to the pressurizing equipment.

[0042] A screw cover sealing gasket 5 is arranged inside the sealing screw cover 3 , which can achieve fastening and sealing with the tank openings of different brake fluid storage tanks 8 .

[0043] The pressurized conduit 1, the fastening nut 2, the sealing nut cover 3, the fixing stud 4 and the fixing base 6 of the device are made of aluminum alloy material, with reasonable structure and reasonable weight, and will not produce chemical reaction with the brake fluid, thereby ensuring the durability of the device.

Claims

1. A brake fluid reservoir sealing and pressurizing device, used for sealing and pressurizing the tank opening of a brake fluid reservoir (8), characterized in that: The invention comprises a fixed base (6) of a rotating body structure, the bottom of the fixed base (6) is a base body of a cone-shaped structure with a central through hole, the center of the base body is provided with a tubular portion which is vertically arranged upward and is integrated with the base body and communicated with the central through hole of the base body, a fixed stud (4) of a rotating body structure is threadedly installed in a sealing nut cover (3), the fixed stud (4) is sleeved on the lower section of the tubular portion of the fixed base (6), a fastening nut (2) is threadedly connected to the upper section of the tubular portion of the fixed base (6) above the sealing nut cover (3), and the fastening nut (2) is rotated to make the fixed base (6) upward. The lower end surface of the fastening nut (2) is moved so as to press against the upper end surface of the fixing stud (4), thereby pressing against and sealing the lower end surface of the fixing stud (4) against the upper end surface of the base body of the fixing base (6); the lower end pipe opening of a pressurizing conduit (1) is threadedly connected and fixed to the upper end pipe opening of the tubular portion of the fixing base (6), so that the pressurizing conduit (1) is communicated with the fixing base (6); the bottom of the sealing nut cover (3) is clamped and fixed to the tank opening of the brake fluid reservoir (8) to be tested in the vertical direction, and the base body of the fixing base (6) is located in the tank opening of the brake fluid reservoir (8) to be tested and is communicated with the tank opening of the brake fluid reservoir (8) to be tested.

2. A brake fluid reservoir sealing and pressurizing device according to claim 1, characterized in that: The sealing screw cover (3) is a rotating body structure with a two-stage stepped inner hole, the fixing stud (4) is a two-stage rotating body structure with an upper diameter smaller than a lower diameter, the center of the fixing stud (4) is provided with a through hole penetrating the height of the fixing stud (4), the lower hole diameter of the sealing screw cover (3) is larger than the lower diameter of the fixing stud (4), the upper inner hole of the sealing screw cover (3) is provided with an internal thread, the upper part of the fixing stud (4) is provided with an external thread, the sealing screw cover (3) and the fixing stud (4) are threadedly connected, and the fixing stud (4) is sleeved on the tubular part of the fixing base (6) through the through hole.

3. The brake fluid reservoir sealing and pressurizing device according to claim 1, characterized in that: The fastening nut (2) is a two-stage rotating body structure with an upper diameter larger than a lower diameter. The center of the fastening nut (2) is provided with an internal threaded hole with an internal thread that runs through the height of the fastening nut (2). The upper section of the tubular portion of the fixed base (6) is provided with an external thread. The fastening nut (2) is threadedly connected to the fixed base (6).

4. A brake fluid reservoir sealing and pressurizing device according to claim 1, characterized in that: The top pipe opening of the tubular portion of the fixed base (6) has an internal thread, the lower end of the pressurizing conduit (1) has an external thread, and the pressurizing conduit (1) is threadedly connected to the top pipe opening of the tubular portion of the fixed base (6).

5. The brake fluid reservoir sealing and pressurizing device according to claim 1, characterized in that: The upper end surface of the base body of the fixed base (6) is provided with an annular platform with an outer diameter smaller than the diameter of the upper end surface of the base body, and a base sealing ring (7) is mounted on the annular platform. The lower end surface of the lower section of the fixed stud (4) is provided with an annular groove for accommodating the base sealing ring (7). When the fixed stud (4) moves downward and is pressed against the base body of the fixed base (6), the base sealing ring (7) is located in the annular platform of the base body and the annular groove of the fixed stud (4), thereby sealing the fixed stud (4) and the base body of the fixed base (6).

6. The brake fluid reservoir sealing and pressurizing device according to claim 1, characterized in that: The hole wall of the lower inner hole of the sealing screw cover (3) is provided with a plurality of claws (9) extending inwards and spaced evenly in the circumferential direction. The outer wall of the tank opening of the brake fluid reservoir tank (8) to be tested is provided with an annular clamping ring (10). The clamping ring (10) is provided with a clamping groove (11) corresponding to the claws (9) one by one. A gap for accommodating the clamping ring (10) of the tank opening of the brake fluid reservoir tank (8) to be tested is provided between the claws (9) and the step portion between the lower inner hole and the upper inner hole of the sealing screw cover (3). When the sealing screw cover (3) is clamped with the tank opening of the brake fluid reservoir tank (8) to be tested, after the claws (9) correspond to the clamping grooves (11) on the clamping ring (10) one by one, the sealing screw cover (3) is pressed downward and rotated so that the claws (9) are clamped on the clamping ring (10), thereby clamping the sealing screw cover (3) with the tank opening of the brake fluid reservoir tank (8).

7. A brake fluid reservoir sealing and pressurizing device according to claim 6, characterized in that: A screw cover sealing gasket (5) is disposed above the claw (9) of the sealing screw cover (3) and is located in the inner hole of the lower section of the sealing screw cover (3). After the sealing screw cover (3) is engaged with the tank opening of the brake fluid reservoir tank (8) to be tested, the screw cover sealing gasket (5) is located between the tank opening of the brake fluid reservoir tank (8) to be tested and the step portion of the sealing screw cover (3), thereby sealing the sealing screw cover (3) and the tank opening of the brake fluid reservoir tank (8) to be tested.

8. A brake fluid reservoir sealing and pressurizing device according to any one of claims 1 to 7, characterized in that: The upper end of the outer surface of the upper section of the fixing stud (4) is provided with a plurality of vertically arranged strip grooves (12) evenly distributed along the circumferential direction, so as to cooperate with a tool to screw the fixing stud (4) and connect and tighten the fixing stud (4) with the sealing screw cover (3).

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