Air tightness test tool for bearing

Abstract

The utility model relates to an air tightness testing tool for a bearing, which comprises a workbench, a testing seat is arranged on the workbench, a positioning column is arranged in the middle of the testing seat, a first sealing ring is arranged on the positioning column, a circle of lower vent groove is concavely arranged on the periphery of the positioning column on the testing seat, and vent holes are arranged on the side wall of the lower vent groove. A second sealing ring is arranged at the upper end of the outer side wall of the lower vent groove, a pressing seat is arranged above the testing seat and driven by a lifting driving mechanism to move up and down, an upper vent groove communicating the exterior and the center of the pressing seat is formed in the lower end face of the pressing seat, a waterproof tester is arranged beside the workbench, an air pump is arranged in the waterproof tester, and the air pump is connected with the upper vent groove. A water column is arranged on the waterproof tester, an inlet of the air pump is connected with the vent hole through an air suction pipe, an outlet of the air pump is connected with the water column through an air outlet pipe, and a one-way valve is arranged at the joint of the air outlet pipe and the water column. The air leakage detection device is simple in structure and convenient to use, can quickly detect whether the bearing leaks air, and ensures the production quality of the bearing.

Description

Technical Field

[0001] The utility model relates to the technical field of bearing processing, in particular to an air tightness testing tool for a bearing. Background Art

[0002] At present, in order to meet customers' higher requirements for use, the sealing of bearings must be guaranteed for certain specific occasions, such as oil, gas, high pressure and other workplaces. The air tightness of bearings needs to be tested before they leave the factory. Therefore, corresponding test tooling needs to be designed for bearing air tightness testing. Summary of the invention

[0003] The purpose of the utility model is to provide an air tightness testing tool for a bearing, which can solve the technical problems mentioned in the background technology.

[0004] In order to achieve the above-mentioned purpose, the technical scheme of the utility model is as follows: a kind of air tightness test tool for bearings, comprising a workbench, a test seat is provided on the workbench, a positioning column for the inner ring of the bearing is provided in the middle of the test seat, a first sealing ring for sealing the inner ring of the bearing is provided on the positioning column, a circle of lower ventilation grooves is recessed on the outer periphery of the positioning column on the test seat, a ventilation hole is provided on the side wall of the lower ventilation groove, and a second sealing ring for sealing the outer ring of the bearing is provided on the upper end of the outer wall of the lower ventilation groove, a pressure seat is provided above the test seat, and the pressure seat is driven by a lifting drive mechanism to move up and down, and an upper ventilation groove connecting the outside and the center of the pressure seat is provided on the lower end surface of the pressure seat, a waterproof tester is provided next to the workbench, an air pump is provided in the waterproof tester, and a water column is provided on the waterproof tester, the inlet of the air pump is connected to the ventilation hole through an air suction pipe, and the outlet of the air pump is connected to the water column through an air outlet pipe, and a one-way valve is provided at the connection between the air outlet pipe and the water column.

[0005] Preferably, the lifting drive mechanism includes a vertical frame arranged on the workbench, the upper end of the vertical frame is provided with a guide seat and an operating seat located above the guide seat, a sliding rod is vertically slidably provided in the guide seat, the lower end of the sliding rod is connected to the pressure seat, the upper end of the sliding rod is rotatably connected to one end of the connecting piece, the other end of the connecting piece is rotatably connected to the middle part of the operating rod, one end of the operating rod is provided with an operating handle, and the other end of the operating rod is rotatably connected to the operating seat.

[0006] Preferably, a connecting column is convexly provided on the workbench, and a connecting groove matching the connecting column is concavely provided on the bottom of the test seat, and the connecting column can be detachably inserted into the connecting groove.

[0007] Preferably, the upper ventilation groove is cross-shaped.

[0008] Preferably, the first sealing ring is sealed on the lower end surface of the bearing inner ring, and the second sealing ring is sealed on the lower end surface of the bearing outer ring.

[0009] Compared with the prior art, the utility model has the beneficial effects of: the utility model has a simple structure, is easy to use, can quickly detect whether the bearing is leaking, and ensures the quality of bearing production. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a stereogram of the utility model.

[0011] Figure 2 It is a partial cross-sectional view of the utility model. DETAILED DESCRIPTION

[0012] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0013] like Figure 1 , Figure 2 As shown, the utility model provides an air tightness test tool for a bearing, comprising a workbench 1, a test seat 2 is provided on the workbench 1, a positioning column 3 for the inner ring of the bearing is provided in the middle of the test seat 2, a first sealing ring 4 for sealing the inner ring of the bearing is provided on the positioning column 3, a circle of lower ventilation grooves 5 is recessed on the outer periphery of the positioning column 3 on the test seat 2, a ventilation hole 6 is provided on the side wall of the lower ventilation groove 5, a second sealing ring 7 for sealing the outer ring of the bearing is provided on the upper end of the outer wall of the lower ventilation groove 5, a pressure seat 8 is provided above the test seat 2, the pressure seat 8 is driven by a lifting drive mechanism to move up and down, an upper ventilation groove 9 connecting the outside and the center of the pressure seat 8 is provided on the lower end surface of the pressure seat 8, a waterproof tester 10 is provided next to the workbench 1, and the waterproof tester is a prior art and is not described here. The waterproof tester 10 is provided with an air pump, and a water column 11 is provided on the waterproof tester 10. The inlet of the air pump is connected to the vent 6 through an air suction pipe 12, and the outlet of the air pump is connected to the water column 11 through an air outlet pipe. A one-way valve is provided at the connection between the air outlet pipe and the water column 11, and the one-way valve is used to prevent water in the water column 11 from flowing into the air outlet pipe.

[0014] When the utility model is used, the bearing to be tested is mounted on the positioning column 3 of the test seat 2, the positioning column 3 positions the inner ring of the bearing to be tested, the first sealing ring 4 seals the inner ring of the bearing to be tested, the second sealing ring 7 seals the outer ring of the bearing to be tested, and then the lifting drive mechanism drives the pressure seat 8 to move downward and press on the bearing to be tested, the bearing to be tested is pressed between the pressure seat 8 and the test seat 2, the lower end of the bearing to be tested is sealed on the upper end of the lower ventilation groove 5, and then the waterproof tester 10 works, and the air pump is passed through the pressure seat 8 to press the bearing to be tested. The lower ventilation groove 5 is evacuated through the exhaust pipe 12 and the vent hole 6. If the sealing effect of the sealing ring of the bearing to be tested is not good, under the action of the vacuum pump, the external air enters the upper ventilation groove 9 on the pressure seat 8, enters the lower ventilation groove 5 from the unsealed part between the sealing ring of the bearing to be tested and the inner ring of the bearing or the outer ring of the bearing, and then enters the vacuum pump from the vent hole 6 and the exhaust pipe 12, and finally enters the water column 11 from the air outlet pipe and generates bubbles, thereby judging that the sealing effect at the position of the sealing ring of the bearing to be tested is not good and the product is unqualified. On the contrary, the external air cannot enter the lower ventilation groove 5 through the bearing to be tested, and the water column 11 cannot generate bubbles, thereby judging that the sealing effect at the position of the sealing ring of the bearing to be tested is good and the product is qualified. After the detection is completed, the lifting drive mechanism drives the pressure seat 8 to move upward, and the bearing to be tested can be removed from the test seat 2. The structure of the utility model is simple and compact, and it is easy to use.

[0015] Preferably, the lifting drive mechanism comprises a stand 13 arranged on the workbench 1, the upper end of the stand 13 is provided with a guide seat 14, and an operating seat 15 located above the guide seat 14, a sliding rod 16 is vertically slidably provided in the guide seat 14, the lower end of the sliding rod 16 is connected to the press seat 8, the upper end of the sliding rod 16 is rotatably connected to one end of a connecting member 17, the other end of the connecting member 17 is rotatably connected to the middle of an operating rod 18, one end of the operating rod 18 is provided with an operating handle 19, and the other end of the operating rod 18 is rotatably connected to the operating seat 15. Pulling the operating handle 19 causes the operating rod 18 to rotate, and the connecting member 17 deflects accordingly, thereby driving the sliding rod 16 to move up and down, thereby realizing the up and down movement of the press seat 8.

[0016] Preferably, a connecting column 20 is convexly provided on the workbench 1, and a connecting groove matching the connecting column 20 is concavely provided on the bottom of the test seat 2. The connecting column 20 can be detachably inserted into the connecting groove to realize the detachable test seat 2. At the same time, the connection between the exhaust pipe 12 and the air vent 6 of the test seat 2 is also detachable. In this way, the test seat 2 can be replaced and can be replaced with test seats 2 of various specifications, so as to perform air tightness detection on bearings of different specifications, and the test seat 2 has good versatility.

[0017] Preferably, the upper ventilation groove 9 is in a cross shape, and may also be in other shapes, as long as it connects the outside and the center of the pressure seat 8.

[0018] Preferably, the first sealing ring 4 is sealed on the lower end surface of the bearing inner ring, and the second sealing ring 7 is sealed on the lower end surface of the bearing outer ring, and the sealing effect is good.

[0019] Although the implementation scheme of the utility model has been disclosed as above, it is not limited to the applications listed in the specification and the implementation scheme. It can be fully applied to various fields suitable for the utility model. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A bearing air tightness test tool, characterized in that: The cam is provided with a plurality of air-tight seals, the seal ring is provided with a plurality of air-tight seals, and the seal ring is provided with a plurality of air-tight seals.

2. The air tightness test tool for bearings according to claim 1, characterized in that: The lifting drive mechanism includes a vertical frame arranged on the workbench, the upper end of the vertical frame is provided with a guide seat and an operating seat located above the guide seat, a sliding rod is vertically slidably provided in the guide seat, the lower end of the sliding rod is connected to the pressure seat, the upper end of the sliding rod is rotatably connected to one end of a connecting piece, the other end of the connecting piece is rotatably connected to the middle part of an operating rod, one end of the operating rod is provided with an operating handle, and the other end of the operating rod is rotatably connected to the operating seat.

3. The air tightness test tool for bearings according to claim 1 or 2, characterized in that: A connecting column is convexly provided on the workbench, and a connecting groove matching the connecting column is concavely provided on the bottom of the test seat, and the connecting column can be detachably inserted into the connecting groove.

4. The air tightness test tool for bearings according to claim 1 or 2, characterized in that: The upper ventilation groove is in a cross shape.

5. The air tightness test tool for bearings according to claim 1 or 2, characterized in that: The first sealing ring is sealed on the lower end surface of the bearing inner ring, and the second sealing ring is sealed on the lower end surface of the bearing outer ring.

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