Motor shell air tightness detection tool

Abstract

The utility model provides an air tightness detection tool for a motor shell. The air tightness detection tool comprises an outer cylinder, an inner cylinder, a core sleeve, a cover plate and a rubber ring, the core sleeve penetrates through the inner cylinder and is fixedly mounted at the bottom of the inner cavity of the outer cylinder; a rectangular spring is arranged between the core sleeve and the inner cylinder; a rubber ring is arranged between the inner cylinder and the top of the core sleeve, the cover plate is installed on the top of the outer cylinder, and the cover plate, the inner cylinder and the core sleeve linearly fix the rubber ring. The outer cylinder is provided with a driving air hole and a testing air hole, and the driving air hole is used for driving the inner cylinder; air enters the test air hole and passes through the air passing hole of the inner cylinder and the air outlet hole of the core sleeve to be used for testing the air tightness of a product. The motor shell sealing detection device is used for carrying out sealing detection on a motor shell, is simple to operate and accurate to test, and achieves the purpose of further improving product quality.

Description

Technical Field

[0001] The utility model belongs to the field of airtight detection, in particular to an airtight detection tooling for the motor housing. Background Art

[0002] Today, with the booming development of new energy vehicles, as a core component, the performance and reliability of the electric drive system directly affect the overall performance and safety of the vehicle; and the airtight detection of the electric drive is an important means to ensure the normal operation of the electric drive system, prevent electric leakage and faults; the purpose of the airtight detection of the electric drive is to detect the sealing performance of the electric drive system, prevent external gases, liquids or impurities from entering the interior, and at the same time prevent the internal electrical components and lubricating oil from leaking out. This is crucial for maintaining a stable working environment for the electric drive system, extending the service life of components and ensuring the safe driving of the vehicle. Content of the Utility Model

[0003] In view of this, the utility model aims to provide an airtight detection tooling for the motor housing, which can detect the motor housing, is easy to operate, has accurate testing, and further improves the product quality.

[0004] To achieve the above object, the technical solution of the utility model is realized as follows:

[0005] The airtight detection tooling for the motor housing includes an outer cylinder, an inner cylinder, a core sleeve, a cover plate and a rubber ring;

[0006] The inner cylinder is sleeved into the inner cavity of the outer cylinder, and the core sleeve passes through the inner cylinder and is fixedly installed at the bottom of the inner cavity of the outer cylinder; a rectangular spring is arranged between the core sleeve and the inner cylinder;

[0007] A rubber ring is arranged between the top of the inner cylinder and the core sleeve, the cover plate is installed at the top of the outer cylinder, and the cover plate, the inner cylinder and the core sleeve fix the rubber ring linearly;

[0008] The outer cylinder is provided with a driving air hole and a testing air hole. The driving air hole intakes air to drive the inner cylinder; the testing air hole intakes air, and passes through the air passing hole of the inner cylinder and the air outlet hole of the core sleeve to test the airtightness of the product.

[0009] Further, a limiting platform is arranged at the bottom of the inner cavity of the outer cylinder, and a limiting groove corresponding to the limiting platform is arranged at the bottom of the core sleeve. The two cooperate to realize the limitation of the core sleeve; a sealing ring is arranged between the core sleeve and the outer cylinder.

[0010] Further, an annular groove is arranged on the circumferential outer surface of the inner cylinder, an air passing hole is arranged at the annular groove, a sealing ring is arranged between the inner cylinder and the outer cylinder, and the testing air hole is communicated with the annular groove.

[0011] Further, the inner cylinder has a T-shaped structure and is arranged in the inner cavity of the inner cylinder, which is divided into an upper cylinder and a lower cylinder. The circumferential surface of the upper cylinder contacts with the inner wall of the inner cylinder through a sealing ring, and a sealing ring is also arranged between the lower cylinder and the inner cylinder.

[0012] An adjustment cavity is formed between the core sleeve and the inner cylinder. Three rectangular springs are evenly distributed between the core sleeve and the inner cylinder. The core sleeve is provided with air outlet holes at the installation positions of the rectangular springs.

[0013] The area between the bottom of the inner cylinder and the bottom of the outer cylinder forms a drive cavity.

[0014] Further, a POM filling member is provided in the adjustment cavity.

[0015] Further, the inner edge of the top of the inner cylinder and the outer edge of the top of the core sleeve are both chamfered structures, forming a card slot therebetween, and the rubber ring is installed in the card slot.

[0016] The lower surface of the cover plate is provided with a concave surface, and an extrusion surface is formed between the concave surface and the top of the inner cylinder.

[0017] When the inner cylinder moves upward, the extrusion of the rubber ring is extruded into the gap formed between the cover plate and the core sleeve.

[0018] Further, a positioning pin is provided at the top of the core sleeve for positioning the product.

[0019] Further, a POM protection ring is provided at the top of the outer cylinder.

[0020] Compared with the prior art, the motor housing airtightness detection tooling of the present utility model has the following advantages:

[0021] The motor housing airtightness detection tooling of the present utility model has a simple structure and is convenient to operate. It can accurately and effectively complete the airtightness detection of the motor housing and improve the product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings constituting a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments and descriptions thereof of the present utility model are used to explain the present utility model and do not constitute an improper limitation of the present utility model. In the drawings:

[0023] Figure 1 is a schematic diagram of the motor housing airtightness detection tooling according to an embodiment of the present utility model;

[0024] Figure 2 is a cross-sectional view of the motor housing airtightness detection tooling according to an embodiment of the present utility model.

[0025] Description of the reference numerals:

[0026] 1. Outer cylinder; 2. Inner cylinder; 21. Air passage hole; 22. Ring groove; 23. Driving cavity; 3. Core sleeve; 31. Air outlet hole; 32. Adjusting cavity; 33. Positioning pin; 4. Cover plate; 5. Rubber ring; 6. Rectangular spring; 71. Test air hole; 72. Driving air hole; 8. POM protective ring. Detailed implementation manners

[0027] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0028] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise stated, the meaning of "a plurality" is two or more.

[0029] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

[0030] The following will refer to the drawings and combine with embodiments to detail the present utility model.

[0031] An airtightness detection tool for a motor housing, as Figure 1 Figure 2 shown, includes an outer cylinder 1, an inner cylinder 2, a core sleeve 3, a cover plate 4 and a rubber ring 5;

[0032] The inner cylinder 2 is sleeved into the inner cavity of the outer cylinder 1, and the core sleeve 3 passes through the inner cylinder 2 and is fixedly installed at the bottom of the inner cavity of the outer cylinder 1; a rectangular spring 6 is arranged between the core sleeve 3 and the inner cylinder 2;

[0033] A rubber ring 5 is provided between the top of the inner cylinder 2 and the core sleeve 3, and the cover plate 4 is installed on the top of the outer cylinder 1. The cover plate 4, the inner cylinder 2, and the core sleeve 3 fix the rubber ring 5 linearly;

[0034] The outer cylinder 1 is provided with a driving air hole 72 and a testing air hole 71. The driving air hole 72 is used for driving the inner cylinder 2 by introducing air; so when air is introduced into the testing air hole 71, it passes through the air passing hole 21 of the inner cylinder 2 and the air outlet hole 31 of the core sleeve 3, and is used for testing the air tightness of the product.

[0035] The driving air hole 72 is connected to a driving air source, and the testing air hole 71 is connected to a testing air source.

[0036] Preferably, a limiting platform is provided at the bottom of the inner cavity of the outer cylinder 1, and a limiting groove corresponding to the limiting platform is provided at the bottom of the core sleeve 3. The two cooperate to realize the limitation of the core sleeve 3; to ensure the precision between connections, a sealing ring is provided between the core sleeve 3 and the outer cylinder 1.

[0037] Preferably, an annular groove 22 is provided on the circumferential outer surface of the inner cylinder 2, and the air passing hole 21 is arranged at the annular groove 22. A sealing ring is provided between the inner cylinder 2 and the outer cylinder 1. The testing air hole 71 is communicated with the annular groove 22. The testing air source enters from the testing air hole 71, then passes through the air passing hole 21, and then flows out from the air outlet hole 31.

[0038] Preferably, the inner cylinder 2 has a T-shaped structure and is arranged in the inner cavity of the inner cylinder 2, which is divided into an upper cylinder and a lower cylinder. The circumferential surface of the upper cylinder is in contact with the inner wall of the inner cylinder 2 through a sealing ring, and a sealing ring is also provided between the lower cylinder and the inner cylinder 2.

[0039] An adjustment cavity 32 is formed between the core sleeve 3 and the inner cylinder 2. Three rectangular springs 6 are evenly distributed between the core sleeve 3 and the inner cylinder 2. The core sleeve 3 is provided with an air outlet hole 31 at the installation position of the rectangular spring 6.

[0040] The area between the bottom of the inner cylinder 2 and the bottom of the outer cylinder 1 forms a driving cavity 23; the driving air source enters from the driving air hole 72 and directly acts on the inner cylinder 2 to lift the inner cylinder 2, and then reset through the driving spring.

[0041] Preferably, a POM filling piece is provided in the adjustment cavity 32. The POM filling is to reduce the volume and improve the testing accuracy.

[0042] Preferably, the inner edge of the top of the inner cylinder 2 and the outer edge of the top of the core sleeve 3 are both chamfered structures, forming a clamping groove therebetween. The rubber ring 5 is installed in the clamping groove. The lower surface of the cover plate 4 is provided with a concave surface, and an extrusion surface is formed between the concave surface and the top of the inner cylinder 2; when the inner cylinder 2 moves upward, the rubber ring 5 is extruded into the gap formed between the cover plate 4 and the core sleeve 3.

[0043] Preferably, a positioning pin 33 is provided at the top of the core sleeve 3 for positioning the product.

[0044] Preferably, a POM protection ring 8 is provided at the top of the outer cylinder 1 to protect the product.

[0045] Place the motor housing on the tooling and position it with the positioning pin 33. The driving gas enters through the driving air hole 72 (pressure: 0.2 MPa). The inner cylinder 2 moves upward in a piston motion, squeezing the rubber ring 5, causing the rubber ring 5 to deform and extrude. The extruded rubber ring 5 is in close contact with the motor housing to achieve a sealing effect.

[0046] Introduce the test gas through the test air hole 71, and then monitor the change of pressure over time. If the pressure drop exceeds the set threshold, it indicates a leak; if there is no change in pressure, it proves that the sealing performance of the motor housing meets the standard.

[0047] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. Air tightness detection tooling for motor housing, characterized in that: Outer cylinder, inner cylinder, core sleeve, cover plate and rubber ring; The inner cylinder is sleeved into the inner cavity of the outer cylinder, and the core sleeve passes through the inner cylinder and is fixedly installed at the bottom of the inner cavity of the outer cylinder; a rectangular spring is arranged between the core sleeve and the inner cylinder; A rubber ring is arranged between the top of the inner cylinder and the core sleeve, the cover plate is installed at the top of the outer cylinder, and the cover plate, the inner cylinder and the core sleeve fix the rubber ring linearly; The outer cylinder is provided with a driving air hole and a testing air hole. The driving air hole intakes air for driving the inner cylinder; when the testing air hole intakes air, it passes through the air passing hole of the inner cylinder and the air outlet hole of the core sleeve to test the air tightness of the product.

2. The airtightness detection tooling for the motor housing according to claim 1, wherein: A limiting platform is arranged at the bottom of the inner cavity of the outer cylinder, and a limiting groove corresponding to the limiting platform is arranged at the bottom of the core sleeve. The two cooperate to realize the limitation of the core sleeve; a sealing ring is arranged between the core sleeve and the outer cylinder.

3. The airtightness detection tooling for the motor housing according to claim 1, wherein: A ring groove is arranged on the circumferential outer surface of the inner cylinder, and an air passing hole is arranged at the ring groove. A sealing ring is arranged between the inner cylinder and the outer cylinder, and the testing air hole is communicated with the ring groove.

4. The airtightness detection tooling for the motor housing according to claim 2, wherein: The inner cylinder has a T-shaped structure and is arranged in the inner cavity of the inner cylinder, which is divided into an upper cylinder and a lower cylinder. The circumferential surface of the upper cylinder is in contact with the inner wall of the inner cylinder through a sealing ring, and a sealing ring is also arranged between the lower cylinder and the inner cylinder. An adjustment cavity is formed between the core sleeve and the inner cylinder. Three rectangular springs are evenly distributed between the core sleeve and the inner cylinder. The core sleeve is provided with an air outlet hole at the installation position of the rectangular spring. A driving cavity is formed in the area between the bottom of the inner cylinder and the bottom of the outer cylinder.

5. The airtightness detection tooling for the motor housing according to claim 4, wherein: A POM filling piece is arranged in the adjustment cavity.

6. The airtightness detection tooling for the motor housing according to claim 4, wherein: The inner edge of the top of the inner cylinder and the outer edge of the top of the core sleeve are both chamfered structures, forming a clamping groove between the two, and the rubber ring is installed in the clamping groove. The lower surface of the cover plate is provided with a concave surface, and an extrusion surface is formed between the concave surface and the top of the inner cylinder. When the inner cylinder moves upward, the extrusion rubber ring is extruded into the gap formed between the cover plate and the core sleeve.

7. The airtightness detection tooling for the motor housing according to claim 1, characterized in that: A positioning pin is arranged at the top of the core sleeve for positioning the product.

8. The airtightness detection tooling for the motor housing according to claim 1, wherein: A POM protection ring is arranged at the top of the outer cylinder.

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