Device for detecting air tightness of bent oil seal

Abstract

According to the air tightness detection device for the bent oil seal, after air tightness detection is completed, the lifting platform ascends, the elastic piece releases elastic force, the push rod moves downwards, and the stamping part is separated from the sealing boss and is positioned on the detection platform, so that after the air tightness detection is completed, the sealing boss can be separated from the stamping part through the cooperation of the sleeve, the push rod and the elastic piece.

Description

Technical Field

[0001] The utility model relates to an air tightness detection device, in particular to an air tightness detection device for a bent rear oil seal. Background Art

[0002] In conventional airtightness testing devices, the sealing boss acts as a shaft and is inserted into the inner hole. The sealing lip is deformed by force, simulating the actual sealing state.

[0003] After the air tightness test is completed, the sealing boss needs to be separated from the stamping part. The sealing lip is deformed by force, causing the stamping part and the sealing boss to move upward synchronously. The operator needs to manually separate the sealing boss from the stamping part, which increases the operation steps.

[0004] In summary, after the air tightness test is completed, how to separate the sealing boss from the stamping part has become an urgent problem that researchers in this field need to solve. Utility Model Content

[0005] The technical problem to be solved by the utility model is: how to separate the sealing boss from the stamping part after the air tightness test is completed;

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] The utility model is a device for testing air tightness of a bent oil seal, comprising: a testing platform, a positioning ring protruding from the middle thereof; a stamping part (bent oil seal), a step surface matching the positioning ring at the middle thereof, and an inner hole provided in the middle of the stamping part; a sealing lip provided at the inner hole; a lifting part, which is lifted and lowered by a power source and has an air extraction hole provided at the bottom thereof; a sealing boss provided at the bottom of the lifting part and suitable for being inserted into the inner hole; a sleeve fixedly provided at a side of the lifting part; a push rod slidably provided at the bottom of the sleeve; an elastic part sleeved on the push rod, one end of the elastic part being connected to the bottom of the sleeve, and the other end being connected to the bottom of the push rod; when the air tightness test is not performed, the bottom of the push rod is lower than the lower surface of the lifting part;

[0008] In this solution, the stamping part is positioned on the inspection table through the positioning of the step surface and the positioning ring, which facilitates the accurate downward positioning of the sealing boss;

[0009] When the airtightness of the stamping part needs to be tested, the power source drives the lifting part and the sealing boss downward, inserting the sealing boss into the inner hole, causing the sealing lip to deform. During this process, the push rod contacts the upper surface of the stamping part, causing the push rod to move upward and the elastic part to contract. At this time, air is extracted through the exhaust hole. If there is no change in air pressure, the product is qualified.

[0010] After completing the airtightness test, the lifting platform moves upward, the elastic part releases the elastic force, and the push rod moves downward to separate the stamping part from the sealing boss and position it on the test platform. In this way, after the airtightness test is completed, the sealing boss can be separated from the stamping part through the cooperation of the sleeve, push rod and elastic part.

[0011] In order to illustrate how the sleeve is fixed to the side of the lifting part, the present invention adopts the connection between the sleeve and the lifting part through the support ear;

[0012] The fixed connection between the sleeve and the lifting part is achieved through the support lug.

[0013] In order to ensure the sealing performance during the air tightness test, the utility model adopts a first sealing ring provided at the bottom of the lifting part; the first sealing ring is suitable for contacting the upper surface of the stamping part; a second sealing ring is provided between the sealing boss and the lifting part;

[0014] The first sealing ring is used to connect the upper surface of the stamping part and the bottom of the lifting platform, and the second sealing ring is used to connect the sealing boss and the lifting part. In this way, only the airtightness test is performed between the sealing lip and the sealing boss, ensuring the sealing performance during the airtightness test.

[0015] In order to illustrate the opening position of the air extraction hole, the present invention adopts the situation that when the sealing boss is inserted into the inner hole, one end of the air extraction hole is located above the sealing lip;

[0016] One end of the exhaust hole is located above the sealing lip, and the other end is located on the side of the sealing boss. In this way, when performing an airtightness test, air is exhausted in the space formed by the first sealing ring, the second sealing ring, and the sealing lip, and then the sealing performance between the sealing lip and the sealing boss is tested.

[0017] The beneficial effects of the utility model are as follows: the utility model is a device for detecting air tightness of a bent oil seal. After the air tightness detection is completed, the lifting platform moves upward, the elastic part releases the elastic force, and the push rod moves downward to separate the stamping part from the sealing boss and position it on the detection platform. In this way, after the air tightness detection is completed, the sealing boss can be separated from the stamping part through the cooperation of the sleeve, the push rod and the elastic part. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 It is a structural diagram of the utility model;

[0020] Figure 2 It is a partial cross-sectional view of the utility model;

[0021] In the figure: 1-testing table, 2-positioning ring, 3-stamping part, 4-inner hole, 5-sealing lip, 6-lifting part, 7-power source, 8-exhaust hole, 9-sealing boss, 10-sleeve, 11-push rod, 12-elastic part, 13-support ear, 14-first sealing ring, 15-second sealing ring. DETAILED DESCRIPTION

[0022] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[0023] like Figure 1-2 As shown, the utility model is a device for testing air tightness of a bent oil seal, comprising: a testing platform 1, a positioning ring 2 protruding from the middle thereof; a stamping part 3, a step surface matching the positioning ring 2 at the middle thereof, and an inner hole 4 opened in the middle of the stamping part; a sealing lip 5, which is arranged at the inner hole 4; a lifting part 6, which is lifted and lowered by a power source 7, and an air extraction hole 8 is opened at the bottom thereof; a sealing boss 9, which is arranged at the bottom of the lifting part 6 and is suitable for being inserted into the inner hole 4; a sleeve 10, which is fixedly arranged on the side of the lifting part 6; a push rod 11, which is slidably arranged at the bottom of the sleeve 10; an elastic member 12, which is sleeved on the push rod 11, one end of which is connected to the bottom of the sleeve 10, and the other end is connected to the bottom of the push rod 11; when the air tightness test is not performed, the bottom of the push rod 11 is lower than the lower surface of the lifting part 6;

[0024] In this solution, the stamping part is positioned on the inspection table through the positioning of the step surface and the positioning ring, which facilitates the accurate downward positioning of the sealing boss;

[0025] When the airtightness of the stamping part needs to be tested, the power source drives the lifting part and the sealing boss downward, inserting the sealing boss into the inner hole, causing the sealing lip to deform. During this process, the push rod contacts the upper surface of the stamping part, causing the push rod to move upward and the elastic part to contract. At this time, air is extracted through the exhaust hole. If there is no change in air pressure, the product is qualified.

[0026] After completing the airtightness test, the lifting platform moves upward, the elastic part releases the elastic force, and the push rod moves downward to separate the stamping part from the sealing boss and position it on the test platform. In this way, after the airtightness test is completed, the sealing boss can be separated from the stamping part through the cooperation of the sleeve, push rod and elastic part.

[0027] like Figure 1 As shown, in order to illustrate how the sleeve is fixed to the side of the lifting part, the present invention adopts the connection between the sleeve 10 and the lifting part 6 through the support ear 13;

[0028] The fixed connection between the sleeve and the lifting part is achieved through the support lug.

[0029] like Figure 2 As shown, in order to ensure the sealing performance during the airtightness test, the present invention adopts a first sealing ring 14 provided at the bottom of the lifting portion 7; the first sealing ring 14 is suitable for contacting the upper surface of the stamping part 3; a second sealing ring 15 is provided between the sealing boss 9 and the lifting portion 7;

[0030] The first sealing ring is used to connect the upper surface of the stamping part and the bottom of the lifting platform, and the second sealing ring is used to connect the sealing boss and the lifting part. In this way, only the airtightness test is performed between the sealing lip and the sealing boss, ensuring the sealing performance during the airtightness test.

[0031] like Figure 2 As shown, in order to illustrate the opening position of the air extraction hole, the present invention adopts that when the sealing boss 9 is inserted into the inner hole 4, one end of the air extraction hole 8 is located above the sealing lip 5;

[0032] One end of the exhaust hole is located above the sealing lip, and the other end is located on the side of the sealing boss. In this way, when performing an airtightness test, air is exhausted in the space formed by the first sealing ring, the second sealing ring, and the sealing lip, and then the sealing performance between the sealing lip and the sealing boss is tested.

[0033] In this solution, the power source includes but is not limited to a pneumatic cylinder, and an electric cylinder or the like may also be used; the elastic member may be a spring.

[0034] Based on the above-mentioned ideal embodiment of the present invention, and in accordance with the above description, relevant personnel can make various changes and modifications without departing from the technical scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, but must be determined according to the scope of the claims.

Claims

1. The device for detecting air tightness of oil seal after bending, characterized in that: include: The testing platform has a protruding central portion provided with a positioning ring; A stamping part, wherein the middle portion thereof has a stepped surface matching the positioning ring, and an inner hole opened in the middle portion of the stamping part; a sealing lip disposed at the inner hole; The lifting part is controlled by a power source to move up and down, and an air extraction hole is opened at the bottom; a sealing boss, which is provided at the bottom of the lifting portion and is suitable for being inserted into the inner hole; a sleeve fixedly arranged on a side of the lifting portion; A push rod, which is slidably arranged at the bottom of the sleeve; an elastic member, which is sleeved on the push rod, with one end connected to the bottom of the sleeve and the other end connected to the bottom of the push rod; When the air tightness test is not performed, the bottom of the push rod is lower than the lower surface of the lifting part.

2. The device for detecting air tightness of bent oil seal according to claim 1, characterized in that: The sleeve is connected to the lifting part via a supporting lug.

3. The device for detecting air tightness of bent oil seal according to claim 1, characterized in that: A first sealing ring is provided at the bottom of the lifting portion; The first sealing ring is adapted to contact the upper surface of the stamping part.

4. The device for detecting air tightness of bent oil seal according to claim 1, characterized in that: A second sealing ring is provided between the sealing boss and the lifting portion.

5. The device for detecting air tightness of bent oil seal according to claim 1, characterized in that: When the sealing boss is inserted into the inner hole, one end of the air extraction hole is located above the sealing lip.

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