Airtightness detection device for motor end cover of battery car

Abstract

An air tightness detection device for a motor end cover of a battery car comprises a positioning seat, an upper portion of the positioning seat is provided with a positioning groove for placing the end cover, a middle portion of the positioning seat is provided with an inner cavity, an upper portion of the inner cavity is communicated with the positioning groove, a bottom portion of the inner cavity is provided with an air channel and is connected with an air source through an air guide pipe, a side wall of the inner cavity is provided with a detection hole, and an outer end of the detection hole is connected with an air pressure sensor. The annular pressing block is arranged above the positioning seat, the upper part of the annular pressing block is connected with the upper positioning plate, and the upper positioning plate is connected with the lifting plate through a vertical rod; the plug is arranged in the center of the annular pressing block and matched with a center hole in the middle of the end cover, and the upper portion of the plug is connected with an air cylinder which is arranged at the bottom of the lifting plate. According to the device, the end cover is tightly pressed in the positioning groove through the annular pressing block, the center hole is plugged through the plug, a closed space is formed between the end cover and the inner cavity of the positioning seat, air is fed into the inner cavity through the air source for pressurization, the pressure value change in the inner cavity is detected through the air pressure sensor, whether leakage points exist on the end cover or not is judged, operation is easy, and the detection efficiency is high.

Description

Technical Field

[0001] The utility model relates to an airtightness detection device for an end cover of a motor of a battery vehicle. Background Art

[0002] The air tightness of the end cap is an important indicator for testing the performance of the motor. The air tightness of the end cap directly affects the sealing performance of the motor. Poor sealing performance will cause the grease inside the motor to overflow from the end cap. Therefore, it is particularly important to test the sealing of the end cap during the production process. In the prior art, the end cap to be tested is often tested by observing bubbles in a sealed air-filled submerged tank. The end cap to be tested is placed in water. After the test is completed, the end cap is taken out of the water and then cleaned and dried. The operation is cumbersome and the test efficiency is low. Utility Model Content

[0003] In view of the shortcomings existing in the above problems, the utility model provides an airtightness detection device for an end cover of a motor of a battery vehicle.

[0004] In order to achieve the above-mentioned purpose, the utility model provides an airtightness detection device for a battery vehicle motor end cover, comprising:

[0005] A positioning seat, the positioning seat is arranged on a workbench, a positioning groove is processed on the upper part of the positioning seat for placing the end cover, an inner cavity is processed in the middle part of the positioning seat, the upper part of the inner cavity is connected with the positioning groove, an airway is processed at the bottom of the inner cavity and connected to the air source through an air guide tube, a detection hole is processed on the side wall of the inner cavity, and the outer end of the detection hole is connected to an air pressure sensor;

[0006] An annular pressing block, the annular pressing block is arranged above the positioning seat, the upper part of the annular pressing block is connected to the upper positioning plate, and the upper positioning plate is connected to the lifting plate through a vertical rod;

[0007] A plug is arranged at the center of the annular pressure block, the plug is matched with the center hole in the middle of the end cover, the upper part of the plug is connected to the cylinder, and the cylinder is arranged at the bottom of the lifting plate.

[0008] As a further improvement of the utility model, a sealing groove is processed near the edge of the bottom of the positioning groove, a sealing ring is installed in the sealing groove, and the sealing ring is arranged corresponding to the annular convex edge at the bottom of the end cover.

[0009] As a further improvement of the utility model, the inner diameter of the annular pressing block is greater than the outer diameter of the upper shaft sleeve of the end cover, and the height of the annular pressing block is greater than the height of the shaft sleeve.

[0010] As a further improvement of the utility model, the upper part of the lifting plate is connected to cylinder I, and the cylinder I is installed on an upper fixed seat. The upper fixed seat is fixedly connected to the workbench through a column, and both sides of the lifting plate are slidably matched with the column through flange connecting sleeves.

[0011] As a further improvement of the utility model, a hollow portion is provided in the middle of the upper positioning plate for the plug to pass through.

[0012] The beneficial effects of the utility model are:

[0013] The device presses the end cover into the positioning groove by means of an annular pressure block. A sealing ring is arranged in the positioning groove to cooperate with the annular convex edge at the bottom of the end cover for sealing, and a plug is used to seal the center hole of the end cover. A closed space is formed between the end cover and the inner cavity of the positioning seat, and then air is introduced into the inner cavity through an air source to apply pressure. The pressure value change in the inner cavity is detected by an air pressure sensor to determine whether there is a leakage point on the end cover. The positioning structure is stable, the operation is simple, and the detection efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a front view of an airtightness detection device for an electric battery vehicle motor end cover according to the utility model;

[0015] Figure 2 is a cross-sectional view of the positioning seat 2;

[0016] Figure 3 It is a cross-sectional view of the end cover 3.

[0017] In the figure: 1. workbench; 2. positioning seat; 21. positioning groove; 22. sealing groove; 23. sealing ring; 24. inner cavity; 25. detection hole; 26. airway; 3. end cover; 31. annular convex edge; 32. center hole; 33. shaft sleeve; 4. air source; 5. air guide tube; 6. air pressure sensor; 7. annular pressure block; 8. upper positioning plate; 81. hollow part; 9. plug; 10. cylinder; 11. pole; 12. lifting plate; 13. upper fixing seat; 14. cylinder I; 15. column; 16. flange connecting sleeve. DETAILED DESCRIPTION

[0018] like Figure 1 As shown, the utility model of the utility model of an airtight detection device for the end cover of a battery vehicle motor comprises a positioning seat 2, the positioning seat 2 is arranged on a workbench 1, a positioning groove 21 is processed on the upper part of the positioning seat 2 for placing the end cover 3, a sealing groove 22 is processed near the edge of the bottom of the positioning groove 21, a sealing ring 23 is installed in the sealing groove 22, and the sealing ring 23 is arranged corresponding to the annular convex edge 31 at the bottom of the end cover 3, an inner cavity 24 is processed in the middle part of the positioning seat 2, the upper part of the inner cavity 24 is connected to the positioning groove 21, an airway 26 is processed at the bottom of the inner cavity 24 and is connected to the air source 4 through the air guide pipe 5, and a detection hole 25 is processed on the side wall of the inner cavity 24, and the outer end of the detection hole 25 is connected to the air pressure sensor 6;

[0019] The annular pressing block 7 is arranged above the positioning seat 2, the upper part of the annular pressing block 7 is connected to the upper positioning plate 8, the upper positioning plate 8 is connected to the lifting plate 12 through the vertical rod 11, the inner diameter of the annular pressing block 7 is larger than the outer diameter of the upper shaft sleeve 33 of the end cover 3, and the height of the annular pressing block 7 is larger than the height of the shaft sleeve 33;

[0020] Plug 9, plug 9 is arranged at the center of the annular pressure block 7, plug 9 is matched with the center hole 32 in the middle of the end cover 3, the upper part of plug 9 is connected to cylinder 10, cylinder 10 is arranged at the bottom of the lifting plate 12, and a hollow part 81 is provided in the middle of the upper positioning plate 8 for plug 9 to pass through, the upper part of the lifting plate 12 is connected to cylinder I 14, cylinder I 14 is installed on the upper fixed seat 13, the upper fixed seat 13 is fixedly connected to the workbench 1 through the column 15, and the two sides of the lifting plate 12 are slidably matched with the column 15 through the flange connection sleeve 16.

[0021] The device presses the end cover into the positioning groove by means of an annular pressure block. A sealing ring is arranged in the positioning groove to cooperate with the annular convex edge at the bottom of the end cover for sealing, and a plug is used to seal the center hole of the end cover. A closed space is formed between the end cover and the inner cavity of the positioning seat, and then air is introduced into the inner cavity through an air source to apply pressure. The pressure value change in the inner cavity is detected by an air pressure sensor to determine whether there is a leakage point on the end cover. The positioning structure is stable, the operation is simple, and the detection efficiency is high.

[0022] In order to facilitate the understanding of the present invention, the following description is given in conjunction with the accompanying drawings during specific use;

[0023] When in use, place the end cover in the positioning groove on the upper part of the positioning seat, with the annular convex edge of the end cover facing downward and its position corresponding to the sealing ring at the bottom of the positioning groove. Cylinder I drives the lifting plate to move downward as a whole until the annular pressure block presses the end cover, and the annular convex edge and the sealing ring are pressed and matched. Then the cylinder drives the plug to move downward, and the lower part of the plug extends into the center hole of the end cover for sealing, and a closed space is formed between the end cover and the inner cavity; then the air source is pressurized into the closed inner cavity through the air guide tube. After the air intake is completed, the air pressure sensor is used to detect whether the air pressure change in the inner cavity is within the set range. Within a fixed time, if the air pressure change is within the set range, it is judged that there is no leakage on the end cover, which is a qualified product. If the air pressure change is not within the set range, it is judged that there is a leakage point on the end cover, which is an unqualified product. After the detection is completed, the pressure relief operation is performed first, and then the components are reset and the end cover can be taken out.

[0024] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An airtightness detection device for a battery vehicle motor end cover, characterized in that: include: A positioning seat (2), the positioning seat (2) being arranged on a workbench (1), a positioning groove (21) being processed on the upper part of the positioning seat (2) for placing an end cover (3), an inner cavity (24) being processed on the middle part of the positioning seat (2), the upper part of the inner cavity (24) being connected to the positioning groove (21), an air channel (26) being processed on the bottom of the inner cavity (24) and connected to an air source (4) via an air guide pipe (5), a detection hole (25) being processed on the side wall of the inner cavity (24), and the outer end of the detection hole (25) being connected to an air pressure sensor (6); An annular pressing block (7), the annular pressing block (7) being arranged above the positioning seat (2), the upper part of the annular pressing block (7) being connected to an upper positioning plate (8), and the upper positioning plate (8) being connected to a lifting plate (12) via a vertical rod (11); A plug (9), the plug (9) is arranged at the center of the annular pressure block (7), the plug (9) is arranged in cooperation with the center hole (32) in the middle of the end cover (3), the upper part of the plug (9) is connected to the cylinder (10), and the cylinder (10) is arranged at the bottom of the lifting plate (12).

2. The airtightness detection device for the end cover of a battery vehicle motor according to claim 1 is characterized in that: A sealing groove (22) is machined near the edge of the bottom of the positioning groove (21), a sealing ring (23) is installed in the sealing groove (22), and the sealing ring (23) is arranged corresponding to the annular convex edge (31) at the bottom of the end cover (3).

3. The airtightness detection device for the end cover of a battery vehicle motor according to claim 1 is characterized in that: The inner diameter of the annular pressing block (7) is greater than the outer diameter of the upper shaft sleeve (33) of the end cover (3), and the height of the annular pressing block (7) is greater than the height of the shaft sleeve (33).

4. The airtightness detection device for the end cover of a battery vehicle motor according to claim 1 is characterized in that: The upper part of the lifting plate (12) is connected to a cylinder I (14), and the cylinder I (14) is installed on an upper fixed seat (13). The upper fixed seat (13) is fixedly connected to the workbench (1) through a column (15), and both sides of the lifting plate (12) are slidably matched with the column (15) through flange connection sleeves (16).

5. The airtightness detection device for the end cover of a battery vehicle motor according to claim 1 is characterized in that: A hollow portion (81) is provided in the middle of the upper positioning plate (8) for the plug (9) to pass through.

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