Air tightness test tool

Abstract

The utility model discloses an air tightness testing tool. The air tightness testing tool comprises a connecting support, an inflation pressure head and a pressing piece. The connecting support extends in the first direction, and the two ends are the first end and the second end respectively. The inflation pressure head is fixedly connected with the first end and is provided with an inflation channel, and an outlet of the inflation channel is communicated with the air hole; the pressing piece is fixedly connected with the second end, and the pressing piece is suitable for abutting against the second surface. According to the air tightness test tool provided by the utility model, the air tightness detection of the motor controller can be realized, and the air tightness test tool has the characteristics of simple structure, small occupied space and low manufacturing and using cost.

Description

Technical Field

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

[0002] The motor controller of new energy vehicles often has high requirements for sealing. Therefore, in the production process of motor controllers, all-in-one electric drives or hybrid transmissions, the motor controller needs to be tested for airtightness separately. At present, automatic airtightness testers and semi-automatic pneumatic airtightness testers are commonly used in the industry. They have the advantages of high efficiency and stable quality, but at the same time, these automatic / semi-automatic airtightness testers are expensive and large in size. They are not applicable in some situations where the working space is small and the budget cost is low. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes an airtightness test tool, which can realize the airtightness test of the motor controller while having a simple structure and occupying less space.

[0004] The air tightness test fixture according to the embodiment of the utility model is used for the air tightness test of the motor controller, the motor controller has a cavity and an air vent connected to the cavity, the motor controller has a first surface and a second surface arranged opposite to each other in a first direction, the air vent runs through the first surface, and the air tightness test fixture comprises: a connecting bracket, the connecting bracket extends along the first direction and has a first end and a second end at both ends, respectively; an inflation pressure head, the inflation pressure head is fixedly connected to the first end, the inflation pressure head has an inflation channel, the inflation pressure head is suitable for abutting against the first surface and making the outlet of the inflation channel communicate with the air vent; a pressing piece, the pressing piece is fixedly connected to the second end, and the pressing piece is suitable for abutting against the second surface.

[0005] According to the air tightness testing tool of the utility model, an inflation pressure head and a clamping piece are respectively fixed at the first end and the second end of a connecting bracket extending along a first direction, the inflation pressure head abuts against a first surface having an air vent, an inflation through hole is provided in the inflation pressure head, and the inflation through hole is connected to the air vent, so that the inflation operation of the motor controller can be realized. At the same time, the air tightness testing tool has the characteristics of simple structure, small space occupation and low manufacturing cost.

[0006] According to some embodiments of the present invention, the pressing member is movably connected to the second end so that the relative distance between the pressing member and the inflation pressure head in the first direction is adjustable.

[0007] According to some embodiments of the utility model, a first through hole is formed at the second end and passes through the second end along the first direction. The clamping member includes a pressure rod having an external thread. The pressure rod is inserted into the first through hole and is threadedly connected to the inner wall of the first through hole.

[0008] According to some embodiments of the present utility model, the pressing member further includes a handle, and the handle is connected to an end of the pressing rod facing away from the inflation pressure head.

[0009] According to some embodiments of the present invention, the pressing member further includes a cushion block, the cushion block is connected to one end of the pressure rod facing the inflation pressure head, and the pressing member is suitable for abutting against the second surface through the cushion block.

[0010] According to some embodiments of the utility model, a fixing column is formed at one end of the pressure rod, a fixing hole is formed on the cushion block, and the cushion block is sleeved on the fixing column through the fixing hole to be fixedly connected to the pressure rod.

[0011] According to some embodiments of the present utility model, the first end is provided with a second through hole, and the inflation pressure head is passed through the second through hole and fixedly connected to the first end.

[0012] According to some embodiments of the utility model, the inflation pressure head includes a connecting portion and a clamping portion connected along a first direction, an external thread is formed on the outer surface of the connecting portion, the connecting portion is passed through the second through hole and is threadedly connected to the inner wall of the second through hole, the clamping portion is connected to one end of the connecting portion facing the clamping piece, and the cross-sectional size of the clamping portion is larger than the cross-sectional size of the second through hole.

[0013] According to some embodiments of the utility model, the air tightness test tool further includes: a sealing member, the sealing member is fixed to the inflation pressure head and extends in a ring shape around the outlet of the inflation channel, the sealing member is suitable for sealingly contacting the first surface

[0014] According to some embodiments of the utility model, the air tightness testing tool also includes: a connecting pipe assembly, the connecting pipe assembly is connected to the end of the inflation pressure head away from the clamping piece, and the connecting pipe assembly is connected to the inlet of the inflation channel.

[0015] According to some embodiments of the utility model, the connecting pipe assembly includes: a quick-connect connector, which is used to connect an air tightness testing device; a trachea connector and a trachea, the trachea connector is connected to the end of the inflation pressure head facing away from the compression piece and is connected to the inlet of the inflation channel, and the trachea is connected between the quick-connect connector and the trachea connector.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the airtightness test tool according to the embodiment of the utility model in assisting the test of the motor controller;

[0018] Figure 2 yes Figure 1 A schematic diagram showing another angle of the airtightness test fixture in assisting the test of the motor controller;

[0019] Figure 3 yes Figure 1 Sectional view along line AA;

[0020] Figure 4 yes Figure 3 The enlarged view of the point B indicated by the middle circle;

[0021] Figure 5 yes Figure 1 Schematic diagram of the airtightness test fixture shown in;

[0022] Figure 6 yes Figure 5 A cross-sectional view of the airtightness test fixture shown in ;

[0023] Figure 7 yes Figure 1 Schematic diagram of the motor controller in;

[0024] Figure 8 yes Figure 7 An enlarged view of the circled area C.

[0025] Reference numerals:

[0026] 100. Air tightness test tooling;

[0027] 10. Connect the bracket;

[0028] 11. first end; 12. second end;

[0029] 20. Inflatable pressure head;

[0030] 21. Connecting part; 22. Pressing part; 23. Inflating channel; 24. Sealing member;

[0031] 30. Clamping parts;

[0032] 31. Pressure rod; 32. Handle; 33. Pad; 34. Fixed column;

[0033] 40. Quick-connect fittings;

[0034] 50. Trachea;

[0035] 60. Trachea connector;

[0036] 200, motor controller; 201, cavity; 202, air vent; 203, first surface; 204, second surface. DETAILED DESCRIPTION

[0037] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0038] Reference below Figure 1-Figure 8 An airtightness testing tool 100 according to an embodiment of the present invention is described.

[0039] Reference Figure 1 and Figure 3 As shown, according to the air tightness test tool 100 of the embodiment of the utility model, the air tightness test tool 100 is used for air tightness test of the motor controller 200, the motor controller 200 has a cavity 201 and a vent hole 202 connected to the cavity 201, and the motor controller 200 has a first direction (for example Figure 1 The first surface 203 and the second surface 204 are arranged relatively to each other in the front-to-back direction (as shown in the figure), and the air vent 202 passes through the first surface 203.

[0040] The air tightness test tool 100 includes: a connecting bracket 10, an inflating pressure head 20 and a pressing piece 30. The connecting bracket 10 extends along a first direction and has two ends, a first end 11 and a second end 12; the inflating pressure head 20 is fixedly connected to the first end 11, and the inflating pressure head 20 has an inflating channel 23, and the inflating pressure head 20 is suitable for abutting against the first surface 203 and making the outlet of the inflating channel 23 communicate with the air vent 202; the pressing piece 30 is fixedly connected to the second end 12, and the pressing piece 30 is suitable for abutting against the second surface 204.

[0041] Reference Figure 1 and Figure 3As shown, the motor controller 200 has a first surface 203 and a second surface 204 in the front-to-back direction, which are distributed in the front-to-back direction, and the first surface 203 and the second surface 204 are arranged opposite to each other. The motor controller 200 has a cavity 201 inside, and a vent hole 202 is provided on the first surface 203, so that the air in the cavity 201 can flow out of the cavity, and the outside air can enter the cavity, so that the cavity 201 of the motor controller 200 can be filled with gas. The vent hole 202 of the motor controller 200 is used to install a vent valve, which can be used to control the flow of gas from the outside into the cavity 201 and the outflow of gas from the cavity 201.

[0042] Reference Figure 3 As shown, the connecting bracket 10 extends in the front-to-back direction, the first end 11 is located at the front side of the connecting bracket 10, and the second end 12 is located at the rear side of the connecting bracket 10, the second end 12 is fixedly connected to the clamping piece 30 located at the rear side of the motor controller 200, and the first end 11 is fixedly connected to the inflation head 20 located at the front side of the motor controller 200. The connecting bracket 10 extends in the front-to-back direction, which can fix the clamping piece 30 and the inflation head 20, and provide support force for the clamping piece 30 and the inflation head 20, so that the clamping piece 30 and the inflation head 20 can respectively clamp the second surface 204 and the first surface 203, so that the air tightness test fixture 100 can be firmly connected to the motor controller 200, and the sealing effect between the inflation head 20 and the first surface 203 of the motor controller 200 is enhanced. At the same time, the connecting bracket 10 has a simple structure, occupies less space, and is easy to carry.

[0043] Reference Figure 3 As shown, the rear end face of the inflation head 20 contacts the first surface 203, and the inflation head 20 has an inflation channel 23 inside, which is connected to the air vent 202, so that external gas can pass through the inflation channel 23 of the inflation head 20 through the air vent 202, thereby entering the cavity 201, and realizing the inflation and pressurization operation of the motor controller 200. The pressing member 30 is located at the rear side of the motor controller 200, and the front side of the pressing member 30 contacts the second surface 204. The pressing member 30 applies pressure to the second surface 204, so that the inflation head 20 can be firmly in contact with the first surface 203.

[0044] Reference Figure 1 , Figure 2 and Figure 3As shown, the first end 11 and the second end 12 of the connecting bracket 10 are respectively fixed with the inflation head 20 and the clamping piece 30. The connecting bracket 10 has a simple structure, occupies little space, and is easy to carry. The clamping piece 30 applies pressure to the motor controller 200, so that the inflation head 20 is pressed against the first surface 203, and the external gas enters the cavity 201 through the inflation channel 23 and the air hole 202, thereby realizing inflation of the motor controller 200, and then realizing the air tightness test of the motor controller 200.

[0045] Reference Figure 1 As shown, when the air tightness test fixture 100 of this embodiment is used, the inflation pressure head 20 and the pressing member 30 are respectively abutted against the first surface 203 and the second surface 204 of the motor controller 200, so that the motor controller 200 is clamped between the inflation pressure head 20 and the pressing member 30 of the air tightness test fixture 100, and the inflation pressure head 20 is aligned with the air vent 202 and communicated with the air vent 202. During the air tightness test, external gas (such as the gas introduced by the air tightness tester) can enter the cavity 201 through the inflation channel 23 of the inflation pressure head 20 to detect the air tightness of the motor controller 200. After the test is completed, the air tightness test fixture 100 is removed from the motor controller 200.

[0046] According to the air tightness testing tool 100 of the utility model, the air pressure head 20 and the clamping member 30 are respectively fixed at the first end 11 and the second end 12 of the connecting bracket 10 extending along the first direction, the air pressure head 20 is abutted against the first surface 203 having the air vent 202, and the air pressure head 20 has an air through hole, which is connected to the air through hole 202, so that the motor controller 200 can be inflated. At the same time, the air tightness testing tool 100 has the characteristics of simple structure, small space occupation and low manufacturing cost.

[0047] Among them, it should be noted that the position of the air hole 202 of the motor controller 200 is used to install the air valve. Before performing an air tightness test on the motor controller 200, the air valve needs to be removed from the air hole 202, and then the air tightness test tool 100 is fixed on the motor controller 200, so that the inflation channel 23 of the inflation head 20 is connected to the air hole 202, so that the gas enters the cavity 201 from the air hole 202. After the air tightness test of the motor controller 200 is completed, the air valve needs to be installed on the air hole 202 again.

[0048] The airtightness test tool 100 can be applied to the airtightness test of the motor controller 200 inside the automobile hybrid transmission and the airtightness test of the motor controller 200 inside the electric drive system.

[0049] According to some embodiments of the present invention, the pressing member 30 is movably connected to the second end 12 so that the relative distance between the pressing member 30 and the inflation pressure head 20 in the first direction is adjustable.

[0050] Reference Figure 2 and Figure 3 As shown, the pressing member 30 is movably connected to the second end 12, and the pressing member 30 and the second end 12 can move relative to each other, for example, the pressing member 30 and the second end 12 can rotate and / or move relative to each other. The front end face of the pressing member 30 abuts against the second surface 204, and the pressing member 30 can move in the front-to-back direction, so that the distance between the inflatable pressure head 20 and the pressing member 30 in the front-to-back direction can be adjusted. When installing the air tightness test fixture 100, the distance between the inflatable pressure head 20 and the pressing member 30 can be adjusted to the maximum first, so that the inflatable pressure head 20 and the pressing member 30 are respectively located at the front and rear sides of the motor controller 200, and then the distance between the inflatable pressure head 20 and the pressing member 30 is continuously reduced until the inflatable pressure head 20 and the motor controller 200 are pressed tightly, at which time, the inflatable pressure head 20 and the motor controller 200 achieve a good seal.

[0051] By arranging the clamping member 30 and the second end 12 to be relatively movable, motor controllers 200 of different types and sizes can be clamped, so that the airtightness test fixture 100 has high versatility and is suitable for airtightness testing of motor controllers 200 of different sizes and types.

[0052] According to some embodiments of the utility model, the second end 12 is formed with a first through hole passing through the second end 12 along the first direction, and the clamping member 30 includes a pressure rod 31, which has an external thread. The pressure rod 31 is inserted into the first through hole and is threadedly connected to the inner wall of the first through hole.

[0053] Reference Figure 3 As shown, the pressure rod 31 passes through the first through hole located at the second end 12, and the external thread of the pressure rod 31 is meshed with the internal thread of the first through hole. The pressure rod 31 can be rotated to move in the front and rear directions. When installing the air tightness test fixture 100, the pressure rod 31 can be rotated to adjust the distance between the inflation head 20 and the clamping piece 30 to the maximum, and the inflation head 20 and the clamping piece 30 are respectively placed on the front and rear sides of the motor controller 200, and then the pressure rod 31 is rotated in the opposite direction to continuously reduce the distance between the inflation head 20 and the clamping piece 30 until the inflation head 20 and the motor controller 200 are clamped. At this time, the inflation head 20 and the motor controller 200 achieve a good seal.

[0054] By engaging the external thread of the pressure rod 31 with the internal thread of the first through hole, the structure of the pressure rod 31 and the second end 12 can be simplified. The structural design of the pressure rod 31 is simple and easy to process. At the same time, the threaded engagement transmission has the characteristics of stable transmission and high precision. Therefore, the pressure rod 31 can better clamp motor controllers 200 of different sizes to ensure the stability of the clamping operation.

[0055] According to some embodiments of the present invention, the pressing member 30 further includes a handle 32 , and the handle 32 is connected to an end of the pressing rod 31 that is away from the inflation pressure head 20 .

[0056] Reference Figure 2 As shown, the rear side of the pressure rod 31 has a handle 32, which can provide a larger operating space when operating the air tightness test tool 100, making the operation easier. The handle 32 facilitates the operation of the pressure rod 31, allowing the pressure rod 31 to obtain a larger rotational torque, thereby allowing the pressure rod 31 to generate a larger clamping force to clamp the motor controller 200.

[0057] Preferably, the pressing member 30 is T-shaped, that is, the handle 32 and the pressing rod 31 are arranged perpendicularly, and the handle 32 extends along a straight line.

[0058] According to some embodiments of the present invention, the pressing member 30 further includes a cushion block 33 , which is connected to one end of the pressure rod 31 facing the inflation pressure head 20 , and the pressing member 30 is adapted to abut against the second surface 204 through the cushion block 33 .

[0059] Reference Figure 3 As shown, the pad 33 is located on the front side of the clamping member 30, and the front side surface of the pad 33 is in contact with the second surface 204. The pad 33 can protect the front end surface of the pressure rod 31, avoid direct contact and collision between the pressure rod 31 and the second surface 204, reduce the wear of the second surface 204 and the pressure rod 31, and provide a buffer when the pressure rod 31 contacts the second surface 204.

[0060] According to some embodiments of the present invention, a fixing column 34 is formed at one end of the pressure rod 31 , a fixing hole is formed on the cushion block 33 , and the cushion block 33 is sleeved on the fixing column 34 through the fixing hole to be fixedly connected to the pressure rod 31 .

[0061] Reference Figure 6 As shown, the inner wall of the fixing hole of the cushion block 33 fits with the outer wall of the fixing column 34 located on the front side of the pressure rod 31, so that the cushion block 33 and the pressure rod 31 are firmly connected. The fixing hole of the cushion block 33 is connected with the fixing column 34 of the pressure rod 31, so that the structure is simple and the connection is firm.

[0062] Optionally, the material of the pad 33 is nylon, which has a relatively low hardness. By setting the material of the pad 33 to be nylon, the motor controller will not be scratched during clamping, thereby avoiding causing a poor appearance of the motor controller.

[0063] Optionally, the inner wall of the fixing hole of the cushion block 33 has an internal thread, which is threadedly connected to the external thread on the fixing column 34, so that the connection structure between the cushion block 33 and the pressure rod 31 is simple and the connection is more secure.

[0064] According to some embodiments of the present invention, the first end 11 is provided with a second through hole, and the inflation head 20 is passed through the second through hole and fixedly connected to the first end 11. Figure 3 As shown, the inflation pressure head 20 is fixed to the first end 11 by passing through the second through hole, and has the characteristics of simple structure and low manufacturing cost.

[0065] According to some embodiments of the utility model, the inflation pressure head 20 includes a connecting portion 21 and a clamping portion 22 connected along a first direction, an external thread is formed on the outer surface of the connecting portion 21, the connecting portion 21 is inserted into the second through hole and is threadedly connected to the inner wall of the second through hole, the clamping portion 22 is connected to one end of the connecting portion 21 facing the clamping piece 30, and the cross-sectional size of the clamping portion 22 is larger than the cross-sectional size of the second through hole.

[0066] Reference Figure 4 As shown, the connection part 21 and the clamping part 22 are distributed along the front-to-back direction, the connection part 21 is located at the front side of the clamping part 22, and the cross-sectional size of the clamping part 22 is larger than the cross-sectional size of the second through hole. When assembling the connection bracket 10 and the inflation head 20, the connection part 21 of the inflation head 20 is inserted into the second through hole from back to front, and the inflation head 20 is screwed until the front end surface of the clamping part 22 abuts against the rear side surface of the first end 11. When the air tightness test fixture 100 is used, when the inflation head 20 is subjected to the forward force, the rear side surface of the first end 11 abuts against the front end surface of the clamping part 22, and the first end 11 can offset the forward force applied by the inflation head 20, limiting the forward movement of the inflation head 20, and at the same time, the external thread of the connection part 21 is connected with the internal thread of the second through hole to further fix the inflation head 20 and the first end 11.

[0067] By arranging an external thread on the connecting portion 21 to connect it with the internal thread on the inner wall of the second through hole, the inflation head 20 can be firmly connected to the first end 11, the structure is simple, and the production cost is reduced. At the same time, the inflation head 20 is divided into a connecting portion 21 and a clamping portion 22. The cross-sectional size of the clamping portion 22 is larger than the cross-sectional size of the second through hole, which can further limit the forward movement of the inflation head 20 and prevent the inflation head 20 from moving forward and damaging the external thread of the connecting portion 21 and the internal thread of the second through hole when it is subjected to greater pressure.

[0068] According to some embodiments of the present invention, the air tightness testing tool 100 may further include a seal 24 , which is fixed to the inflation pressure head 20 and extends in a ring shape around the outlet of the inflation channel 23 , and is suitable for sealingly abutting against the first surface 203 .

[0069] Reference Figure 3 and Figure 5 As shown, the seal 24 is located on the rear side of the inflation head 20. The seal 24 is an annular structure. The front side surface of the seal 24 contacts the rear side surface of the inflation head 20, and the rear side surface of the seal 24 contacts the first surface 203. The rotating clamping member 30 can compress the inflation head 20 and the first surface 203, thereby compressing the seal 24, so that gas flows in the internal area of ​​the inner ring of the seal 24, and the front end face and the rear end face of the seal 24 are respectively pressed against the inflation head 20 and the first surface 203 to prevent gas from leaking from the gap between the inflation head 20 and the first surface 203, thereby achieving sealing.

[0070] By adopting the annular seal 24, the inflation head 20 can be sealed in the circumferential direction to reduce the probability of leakage.

[0071] According to some embodiments of the present utility model, a sealing groove is formed on the inflation pressure head 20 , and the sealing groove extends in a ring shape along the outlet of the inflation channel 23 , and the sealing member 24 is disposed in the sealing groove.

[0072] Reference Figure 4 As shown, a sealing groove is formed on the rear end face of the inflation head 20. The sealing groove is annular and is used to place an annular seal 24. By setting the sealing groove, the seal 24 can be limited, so that the connection between the inflation head 20 and the seal 24 is stable, reducing the probability of the seal 24 being offset.

[0073] Optionally, the seal 24 is an annular rubber gasket, and one side surface of the seal 24 has double-sided tape, which is respectively adhered to the front side of the seal 24 and the front side wall of the sealing groove to make the connection between the seal 24 and the sealing groove more secure.

[0074] According to some embodiments of the present invention, the air tightness testing tool 100 may further include: a connecting pipe assembly, the connecting pipe assembly is connected to the end of the inflation pressure head 20 away from the clamping member 30 , and the connecting pipe assembly is connected to the inlet of the inflation channel 23 .

[0075] Reference Figure 5 As shown, the connecting pipe assembly is located on the front side of the inflation pressure head 20 and is connected to the inlet of the inflation channel 23. The front side of the connecting pipe assembly is connected to a device that provides gas from the outside. By setting the connecting pipe assembly, it is convenient to connect the air tightness test tool 100 with a device that provides gas from the outside.

[0076] According to some embodiments of the present invention, the connecting pipe assembly includes: a quick-connect connector 40, an air pipe connector 60 and an air pipe 50. The quick-connect connector 40 is used to connect the air tightness test device, the air pipe connector 60 is connected to the end of the inflation pressure head 20 away from the compression member 30 and communicates with the inlet of the inflation channel 23, and the air pipe 50 is connected between the quick-connect connector 40 and the air pipe connector 60.

[0077] Reference Figure 5 As shown, the trachea connector 60 is connected to the front side of the inflation pressure head 20 and communicates with the entrance of the inflation channel 23. The rear end of the trachea 50 is connected to the front end of the trachea connector 60, and a sealing device is provided at the connection between the trachea 50 and the trachea connector 60 for sealing. The front end of the trachea 50 is connected to the quick-connect connector 40, and a sealing device is provided at the connection between the trachea 50 and the quick-connect connector 40 for sealing. The quick-connect connector 40 can be quickly docked with the quick-connect connector connected to the air tightness testing instrument, so that the air tightness testing tool 100 can be connected to the air tightness testing instrument faster and more conveniently. By arranging the trachea 50 to be connected to the trachea connector 60 and the quick-connect connector 40 respectively, a soft connection between the quick-connect connector 40 and the inflation pressure head 20 can be achieved, which is convenient for the air tightness testing tool 100 to adjust its position, and at the same time serves as a channel for gas from the quick-connect connector 40 to the inflation pressure head 20.

[0078] According to some embodiments of the present invention, the connecting bracket 10 is U-shaped, bow-shaped or I-shaped.

[0079] Reference Figure 1 As shown, the connecting bracket 10 can be U-shaped, bow-shaped or I-shaped. The connecting bracket 10 can pass through the motor controller 200 from above or below the motor controller 200 in the front-to-back direction. The first end 11 and the second end 12 of the connecting bracket 10 are respectively located at the front and rear sides of the connecting bracket 10. The connecting bracket 10 can be mounted on the front and rear ends of the motor controller 200 from above or below. Through the inflation head 20 located at the first end 11 and the clamping piece 30 located at the second end 12, the clamping piece 30 moves forward, so that the motor controller 200 and the inflation head 20 are clamped, thereby making the clamping piece 30, the motor controller 200 and the inflation head 20 firmly connected.

[0080] In the conventional method, when the inflation pressure head 20 is docked with the air vent 202, in order to ensure the docking accuracy and the stability of the test process, it is necessary to use a special tray in advance to accurately position the motor controller 200. The airtightness test tool 100 provided in the embodiment of the utility model is a portable tool, which can be quickly applied in various scenarios such as assembly line production, manual assembly outside the line, and after-sales maintenance. The motor controller 200 only needs to be simply placed stably, and there is no need to use a special tray for precise positioning. By setting a U-shaped, bow-shaped or I-shaped connecting bracket 10, the structure of the connecting bracket 10 can be simplified, the manufacturing cost can be reduced, and the operation is easy.

[0081] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0082] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0083] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0084] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0085] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An air tightness test tool, used for air tightness test of a motor controller, the motor controller having a cavity and an air vent connected to the cavity, the motor controller having a first surface and a second surface arranged opposite to each other in a first direction, the air vent passing through the first surface, characterized in that: The air tightness test tool comprises: A connecting bracket, the connecting bracket extends along the first direction and has two ends, respectively, a first end and a second end; An inflation pressure head, the inflation pressure head is fixedly connected to the first end, the inflation pressure head has an inflation channel, the inflation pressure head is suitable for abutting against the first surface and making the outlet of the inflation channel communicate with the air vent; A pressing member, wherein the pressing member is fixedly connected to the second end and is suitable for abutting against the second surface.

2. The airtightness test tool according to claim 1, characterized in that: The pressing member is movably connected to the second end so that the relative distance between the pressing member and the inflation pressure head in the first direction is adjustable.

3. The airtightness test tool according to claim 2, characterized in that: The second end is formed with a first through hole penetrating through the second end along the first direction. The pressing member includes a pressure rod having an external thread. The pressure rod is inserted into the first through hole and is threadedly connected to the inner wall of the first through hole.

4. The airtightness test tool according to claim 3, characterized in that: The pressing member further comprises a handle, which is connected to an end of the pressing rod which is away from the inflation pressure head.

5. The airtightness test tool according to claim 3, characterized in that: The pressing member further comprises a cushion block, which is connected to one end of the pressure rod facing the inflation pressure head, and the pressing member is suitable for abutting against the second surface through the cushion block.

6. The airtightness test tool according to claim 5, characterized in that: A fixing column is formed at one end of the pressure rod, a fixing hole is formed on the cushion block, and the cushion block is sleeved on the fixing column through the fixing hole to be fixedly connected with the pressure rod.

7. The airtightness test tool according to any one of claims 1 to 6, characterized in that: The first end is provided with a second through hole, and the inflation pressure head is passed through the second through hole and fixedly connected to the first end.

8. The airtightness test tool according to claim 7, characterized in that: The inflation pressure head includes a connecting portion and a clamping portion connected along a first direction, an external thread is formed on the outer surface of the connecting portion, the connecting portion is inserted into the second through hole and is threadedly connected to the inner wall of the second through hole, the clamping portion is connected to one end of the connecting portion facing the clamping piece, and the cross-sectional size of the clamping portion is larger than the cross-sectional size of the second through hole.

9. The airtightness test tool according to any one of claims 1 to 6, characterized in that: Also includes: A sealing member is fixed on the inflation pressure head and extends in a ring shape around the outlet of the inflation channel, and the sealing member is suitable for sealingly abutting against the first surface.

10. The airtightness test tool according to any one of claims 1 to 6, characterized in that: Also includes: A connecting pipe assembly is connected to an end of the inflation pressure head away from the pressing member, and the connecting pipe assembly is communicated with an inlet of the inflation channel.

11. The airtightness test tool according to claim 10, characterized in that: The connecting pipe assembly comprises: A quick-connect connector, which is used to connect an air tightness test device; An air pipe joint and an air pipe, wherein the air pipe joint is connected to an end of the inflation pressure head away from the compression piece and communicates with the inlet of the inflation channel, and the air pipe is connected between the quick-plug joint and the air pipe joint.

Images