Gas detection tool for vehicle-mounted charger shell and working method of gas detection tool

Abstract

The invention discloses a gas detection tool for a vehicle-mounted charger shell and a working method of the gas detection tool, and belongs to the field of gas detection tools. The device comprises a tool body, a pull rod, a limiting part, a rubber ring, an adjusting assembly and the like. The length dimension of the rubber ring is set to be consistent with the depth dimension of the hole structure of the to-be-measured shell workpiece, so that the deformation and expansion position of the rubber ring after being pressed is effectively ensured to be in the hole structure, the rubber ring is prevented from expanding out of the hole structure, meanwhile, the step part can abut against the end face of the hole structure, the positioning effect and the stabilizing effect can be achieved, and the detection accuracy is improved. Meanwhile, the rubber ring can be limited, the rubber ring is further prevented from expanding out of the hole structure, and it is guaranteed that the deformed and expanded position of the rubber ring is located in the hole structure after the rubber ring is pressed. Therefore, the hole structure is effectively sealed by the gas detection tool in the gas detection process of the shell, the sealing performance of the rubber ring in the gas detection process of the shell is ensured, and the condition that the gas detection result deviates from the actual condition due to insufficient sealing performance of the tool is avoided.

Description

Technical Field

[0001] The present invention relates to the field of air detection tooling, and particularly relates to an air detection tooling for an in-vehicle charger housing and its working method. Background Art

[0002] The in-vehicle charger housing is an important part of the in-vehicle charger. With the rapid development of new energy vehicles, the market demand for in-vehicle charger housings is also increasing continuously. In order to prevent dust, moisture, etc. from entering the interior of the housing and affecting the normal operation of the charger, the housing usually adopts a sealing design. Sealing performance is one of the most important performances of the charger housing. Therefore, in order to ensure the airtight performance of the product, it needs to be detected after the product is produced. The commonly used method is air pressure detection. Among them, the air detection tooling for the in-vehicle charger housing is a special device for detecting the sealing performance of the housing, and the waterproof and dustproof performance of the housing is verified by the air pressure detection method to see if it meets the design requirements.

[0003] Since the in-vehicle charger housing usually has more than one hole structure (such as a water nozzle hole), when performing airtightness detection, it is necessary to block the hole structures on the housing through the air detection tooling before airtightness detection can be carried out. An existing air detection tooling includes a rubber ring. When in use, the rubber ring is placed in the water nozzle hole, and then the rubber ring expands and deforms to closely adhere to the inner wall of the hole structure, thereby playing a sealing role for the hole structure. However, in an existing in-vehicle charger housing product of the applicant, the depth dimension of the water nozzle hole is relatively small, while for the existing air detection tooling, the size of the rubber ring is relatively long. When it is used in a relatively shallow hole structure, the expansion position is uncontrollable, and the expansion and deformation position of the rubber ring is often outside the hole structure, thus unable to effectively seal the hole structure. During the pressurization process, it is easily pushed out by the pressure, resulting in the inability to carry out air detection. Summary of the Invention

[0004] The present invention provides an air detection tooling for an in-vehicle charger housing and its working method, which can solve the problem that the existing air detection tooling cannot stably seal the hole structure with a relatively small depth dimension.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] An air detection tooling for an in-vehicle charger housing includes:

[0007] A tooling main body, with a cavity provided inside the tooling main body;

[0008] A pull rod, which is movably arranged in the cavity, and one end of which extends outside the cavity;

[0009] A limiting part, which is fixedly connected to the end of the pull rod located outside the cavity;

[0010] A rubber ring is sleeved on the pull rod and is located between the limiting part and the tooling body;

[0011] An adjusting assembly is used to adjust the distance between the limiting part and the tooling body;

[0012] Wherein, the outer diameter of the limiting part is the same as the outer diameter of the rubber ring, the size of one end of the tooling body close to the rubber ring is larger than the outer diameter size of the rubber ring to form a step part, the diameter size of the step part is larger than the aperture of the hole structure on the charger housing, and the length size of the rubber ring is less than or equal to the depth size of the hole structure.

[0013] In a solution of the present invention: the adjusting assembly includes a connecting seat, a rotating shaft and a hand rod. The connecting seat is fixedly arranged on the tooling body and is located at one end far from the rubber ring. The hand rod is rotatably connected to the connecting seat through the rotating shaft. The hand rod is movably connected to the pull rod through a connecting piece, and the position where the rotating shaft is located is spaced from the connecting piece.

[0014] In a solution of the present invention: an outer sleeve is arranged outside the tooling body.

[0015] In a solution of the present invention: a lifting ring is arranged on the side surface of the tooling body.

[0016] In a solution of the present invention: the size of one end of the tooling body close to the rubber ring is larger than the size of the other end.

[0017] In a solution of the present invention: the limiting part includes a limiting head and a limiting ring. The limiting head is fixedly connected to the pull rod, and the size of the limiting head is larger than the size of the pull rod. The limiting ring is sleeved on the pull rod.

[0018] In a solution of the present invention: a disassembly and assembly auxiliary structure is arranged on the limiting head.

[0019] In a solution of the present invention: a deformation cavity is arranged at one end of the rubber ring close to the limiting part, and the deformation cavity is arranged around the axis of the rubber ring.

[0020] In a solution of the present invention: deformation notches are arranged on the inner wall of the rubber ring along its circumferential direction.

[0021] A working method of an air detection tooling for a vehicle-mounted charger housing based on the above includes the following steps:

[0022] Position, clamp and fix the shell product to be measured;

[0023] Insert the limiting part and the rubber ring into the hole structure, with the stepped part abutting against the end face at the position of the hole structure. Ensure that the rubber ring is in its original length state during insertion. Then, adjust the component to reduce the distance between the limiting part and the stepped part, and squeeze the rubber ring through the limiting part and the stepped part to cause the rubber ring to deform and expand, thereby squeezing the inner wall of the hole structure to fix and seal the hole structure.

[0024] Inflate the inside of the housing to the set test pressure.

[0025] Conduct a pressure holding test, and detect the leakage amount after holding the pressure for a specified duration.

[0026] Based on the leakage amount detection, determine the result of the housing workpiece. At the same time, increase the distance between the limiting part and the stepped part through the adjusting component to relieve the deformation of the rubber ring, then exhaust and depressurize the housing, and finally take out the workpiece to complete the airtight inspection operation of the housing workpiece.

[0027] According to an airtight inspection tooling and its working method for a vehicle-mounted charger housing of the present invention, it has at least one of the following technical effects:

[0028] In this application, by setting the length dimension of the rubber ring to be consistent with the depth dimension of the hole structure (water nozzle hole) of the housing workpiece to be tested, it effectively ensures that the position where the rubber ring deforms and expands after being pressurized is inside the hole structure, avoiding the rubber ring bulging out of the hole structure. At the same time, a stepped part is provided to abut against the end face of the hole structure, which can play a positioning role and a stabilizing role, and can also play a limiting role on the rubber ring, further avoiding the rubber ring bulging out of the hole structure and ensuring that the position where the rubber ring deforms and expands after being pressurized is inside the hole structure. Furthermore, it ensures the effective sealing of the hole structure during the airtight inspection of the housing by the airtight inspection tooling, guarantees the sealing performance of the rubber ring during the airtight inspection of the housing, and avoids the deviation of the airtight inspection result from the actual situation due to insufficient sealing performance of the tooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above and / or additional aspects and advantages of the present invention will become obvious and easy to understand in the description of the embodiments in conjunction with the following drawings. Obviously, the drawings in the following description are only some embodiments of the present invention, and those of ordinary skill in the art can also obtain other drawings based on these drawings without creative efforts. Among them:

[0030] Figure 1 is a schematic structural diagram of an airtight inspection tooling for a vehicle-mounted charger housing provided by the present invention;

[0031] Figure 2 is an airtight inspection tooling for a vehicle-mounted charger housing provided by the present invention Figure 1 is a schematic cross-sectional structural diagram;

[0032] Figure 3Schematic structural diagram of the top view of an air inspection tooling for the housing of an in-vehicle charger provided by the present invention;

[0033] Figure 4 Schematic structural diagram of the cross-section of the rubber ring in an air inspection tooling for the housing of an in-vehicle charger provided by the present invention.

[0034] Explanation of reference numerals:

[0035] 1. Tooling main body; 2. Pull rod; 3. Rubber ring; 4. Step part; 5. Hand rod; 6. Connecting seat; 7. Limit head; 8. Limit ring; 9. Deformation cavity. Detailed implementation manners

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0037] As Figures 1 to 4 shown, an air inspection tooling for the housing of an in-vehicle charger provided by an embodiment of the present invention includes: a tooling main body 1, a pull rod 2, a limiting part, a rubber ring 3, an adjusting component, etc. Among them, the tooling main body 1 is used as the main structure of the tooling, and stainless steel material can be selected, or other hard materials can also be selected. A cavity is provided inside the tooling main body 1 for accommodating the pull rod 2. It can be set as a columnar structure for easy holding. An outer sleeve can be provided outside the tooling main body 1, and the outer sleeve can be set as a flexible material. A frosted structure can also be provided outside the tooling main body 1 for easy holding. A hanging ring can be provided on the side of the tooling main body 1 for easy picking up, placing, or hanging. The size of one end of the tooling main body 1 close to the rubber ring 3 is larger than that of the other end. This is convenient for operation and identification during use.

[0038] Please refer to Figures 1 - 4 , in one of the embodiments of the present invention, the pull rod 2 is movably arranged in the cavity, and one end of it extends to the outside of the cavity; the limiting part is fixedly connected to the end of the pull rod 2 located outside the cavity; the limiting part can be an integral structure with the pull rod 2, or can be fixedly connected, such as welding, threaded connection, etc. The rubber ring 3 is sleeved on the pull rod 2 and is located between the limiting part and the tooling main body 1; the rubber ring 3 is made of a flexible material and can elastically deform. For example, rubber material can be used. As an example, the material of the rubber ring 3 can be hydrogenated nitrile.

[0039] Please refer to Figures 1 - 4, in one embodiment of the present invention, the outer diameter of the limiting portion is the same as the outer diameter of the rubber ring 3, or can be slightly smaller than the outer diameter of the rubber ring 3 to avoid scratching the inner wall of the hole structure when taking it out. However, the outer diameter of the limiting portion is larger than the inner diameter of the rubber ring 3, so as to play a role in limiting and extruding the deformation of the rubber ring 3. The size of one end of the tooling main body 1 close to the rubber ring 3 is larger than the outer diameter of the rubber ring 3, thus forming a step portion 4. The diameter of the step portion 4 is larger than the aperture of the hole structure on the charger housing. The rubber ring 3 is limited by the step portion 4, which can play a positioning effect when inserted into the hole structure of the housing, and can also play a limiting role during the deformation process of the rubber ring 3 to prevent the deformed part of the rubber ring 3 from exceeding the hole structure. The length dimension of the rubber ring 3 is less than or equal to the depth dimension of the hole structure. In this way, it can be ensured that the position where the rubber ring 3 expands and deforms is inside the hole structure, ensuring the sealing and fixing effect on the hole structure.

[0040] Please refer to Figures 1 - 4 , in one embodiment of the present invention, the adjusting assembly is used to adjust the distance between the limiting portion and the tooling main body 1. The adjusting assembly can be a telescopic structure, such as a screw structure, a linear motor or a cylinder, etc. As a preferred example, the adjusting assembly includes a connecting seat 6, a rotating shaft and a hand lever 5. The connecting seat 6 is fixedly arranged on the tooling main body 1 and is located at one end far from the rubber ring 3. The hand lever 5 is rotatably connected to the connecting seat 6 through the rotating shaft. The hand lever 5 is movably connected to the pull rod 2 through a connecting member, and the position where the rotating shaft is located is spaced from the connecting member. When in use, in the normal state, the hand lever 5 and the tooling main body 1 are generally in the same direction (on a straight line). At this time, the distance between the limiting portion and the step portion 4 is relatively large, and the rubber ring 3 is in the original length and undeformed state. When needed, by rotating the hand lever 5, the hand lever 5 rotates 90° around the rotating shaft, and the hand lever 5 is perpendicular to the tooling main body 1. Due to the change of the hand lever 5, the pull rod 2 is prompted to move a certain distance in the direction of the hand lever 5. Then the distance between the limiting portion and the step portion 4 is shortened, and the rubber ring 3 is extruded. Since the inner part of the rubber ring 3 is limited by the outer wall of the pull rod 2, the rubber ring 3 will be extruded and contracted in the axial length direction and will deform and expand outward in the radial direction, so as to abut against the inner wall of the hole structure of the housing workpiece, be fixedly connected with the water nozzle hole, and seal the water nozzle hole. After the air inspection is completed, pull the hand lever 5 to make the hand lever 5 return to the same direction state as the tooling main body 1, release the extrusion of the limiting portion and the step portion 4 on the rubber ring 3, and the rubber ring 3 returns to its original length, then the tooling can be taken out. The connecting member can be a rigid rod, and its two ends are respectively hinged to the hand lever 5 and the pull rod 2. The connecting rod can also be a flexible cable structure, or a radial chute can be provided at the end of the pull rod 2 / hand lever 5, and the end of the connecting member is slidably arranged in the chute to compensate for and adapt to the position change during the rotation of the hand lever 5.

[0041] Please refer to Figures 1 - 4, in one embodiment of the present invention, the limiting portion may include a limiting head 7 and a limiting ring 8. The limiting head 7 is fixedly connected to the pull rod 2. The limiting head 7 and the pull rod 2 may be provided as an integral structure, and the size of the limiting head 7 is larger than that of the pull rod 2. The limiting ring 8 is sleeved on the pull rod 2, and the inner diameter of the limiting ring 8 is larger than the outer diameter of the pull rod 2 and smaller than the outer diameter of the limiting head 7. In this way, as needed, for example, when the hole diameters of the hole structures of products of different specifications are different, the limiting ring 8 can be replaced. At the same time, rubber rings 3 of different specifications can also be replaced. The limiting head 7 may be provided with a disassembly and assembly auxiliary structure. The disassembly and assembly auxiliary structure may be oppositely arranged notches provided on both sides of the limiting head 7, or may be a slotted head, a Phillips head or a hexagonal socket, etc., so as to play an auxiliary disassembly role during disassembly and assembly.

[0042] Please refer to Figure 4 , in one embodiment of the present invention, a deformation cavity 9 may be provided at one end of the rubber ring 3 close to the limiting portion, and the deformation cavity 9 is arranged around the axis of the rubber ring 3. The deformation cavity 9 may be one, or may be a plurality of deformation cavities arranged around the axis of the rubber ring 3, or may be arranged as an annular shape around the axis of the rubber ring 3. Alternatively, deformation notches may be provided along the circumferential direction on the inner wall of the rubber ring 3. By providing the deformation cavity 9 and / or the deformation notches, the strength of the rubber ring 3 at this position is reduced. Thus, when the limiting portion and the step portion 4 press the rubber ring 3, the rubber ring 3 will preferentially deform at this position, so that it can be ensured that the deformation position of the rubber ring 3 is within the hole structure of the housing and is preferably at a deeper position inside the hole structure, thereby ensuring the relative stability between the deformed rubber ring 3 and the hole structure and ensuring the sealing performance of the hole structure during the airtightness inspection.

[0043] The working principle of the present invention:

[0044] A working method of an air detection tooling for an in - vehicle charger housing based on the above - mentioned one includes the following steps: Position, clamp and fix the housing product to be tested through a tooling fixture to ensure the stability of the product, and this process can be selected according to needs; Insert the limiting part and the rubber ring 3 into the hole structure, and the stepped part 4 abuts against the end face at the position of the hole structure. Ensure that the rubber ring 3 is in its original length state when inserting; Then, through the adjusting component, reduce the distance between the limiting part and the stepped part 4, and squeeze the rubber ring 3 through the limiting part and the stepped part 4, prompting the rubber ring 3 to deform and expand, and then squeeze the inner wall of the hole structure to fix and seal the hole structure; Inflate the housing to a set test pressure; This inflation process can be achieved by setting an air flow channel in the tooling main body 1 and the pull rod 2 structure, and a connector can be set on the side of the tooling main body 1 to connect the air source. Conduct a pressure - holding test, and detect the leakage amount after holding the pressure for a specified duration; The pressure - holding duration can be 2 - 5 minutes, or an appropriate pressure - holding time can be selected according to needs, or the air pressure in the housing can be detected by a pressure sensor to obtain the airtightness of the housing workpiece. Then, based on the leakage amount detection, determine the result of the housing workpiece (qualified / unqualified for airtightness of the workpiece). At the same time, through the adjusting component, increase the distance between the limiting part and the stepped part 4, so that the rubber ring 3 is released from deformation, and then exhaust and relieve the pressure of the housing, and then take out the workpiece to complete the air detection operation of the housing workpiece.

[0045] In this application, by setting the length dimension of the rubber ring 3 to be the same as the depth dimension of the hole structure (water nozzle hole) of the housing workpiece to be tested, it is effectively ensured that the position where the rubber ring 3 deforms and expands after being pressed is inside the hole structure, avoiding the rubber ring 3 bulging out of the hole structure. At the same time, the stepped part 4 is provided to be able to abut against the end face of the hole structure, which can play a positioning role and a stabilizing role, and can also play a limiting role on the rubber ring 3, further avoiding the rubber ring 3 bulging out of the hole structure, and ensuring that the position where the rubber ring 3 deforms and expands after being pressed is inside the hole structure. Furthermore, it ensures the effective sealing of the hole structure by the air detection tooling during the air detection of the housing, ensures the sealing performance of the rubber ring 3 during the air detection of the housing, and avoids the deviation of the air detection result from the actual situation due to insufficient sealing performance of the tooling.

[0046] The above has described an embodiment of the present invention in detail, but the content described is only a preferred embodiment of the present invention and cannot be considered as limiting the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of the present invention application should still fall within the scope covered by the claims of the present invention.

[0047] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present invention is usually placed during use. It 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 on the present invention. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance. In the description of the present invention, unless otherwise specified, the meaning of "a plurality of" is two or more than two.

[0048] In the description of the present invention, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "below", "under" and "beneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0049] In the description of the present invention, it should also be noted that, unless otherwise clearly specified and defined, the terms "arranged" and "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. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. An air inspection tooling for the shell of an on-vehicle charger, characterized in that Including: A tooling main body, with a cavity provided inside the tooling main body; A pull rod, which is movably arranged in the cavity, and one end of which extends to the outside of the cavity; A limiting part, which is fixedly connected to the end of the pull rod located outside the cavity; A rubber ring, which is sleeved on the pull rod and is located between the limiting part and the tooling main body; An adjusting assembly, which is used to adjust the distance between the limiting part and the tooling main body; Wherein, the outer diameter of the limiting part is the same as the outer diameter of the rubber ring, the dimension of one end of the tooling main body close to the rubber ring is larger than the outer diameter dimension of the rubber ring to form a stepped part, the diameter dimension of the stepped part is larger than the aperture of the hole structure on the charger housing, and the length dimension of the rubber ring is less than or equal to the depth dimension of the hole structure.

2. The air inspection tooling for the in-vehicle charger housing according to claim 1, characterized in that The adjusting assembly includes a connecting seat, a rotating shaft and a hand lever. The connecting seat is fixedly arranged on the tooling main body and is located at the end far from the rubber ring. The hand lever is rotatably connected to the connecting seat through the rotating shaft. The hand lever is movably connected to the pull rod through a connecting piece, and the position where the rotating shaft is located is spaced from the connecting piece.

3. The air inspection tooling for the vehicle-mounted charger housing according to claim 2, characterized in that, An outer sleeve is arranged outside the tooling main body.

4. The air inspection tooling for the in-vehicle charger housing according to claim 3, characterized in that A lifting ring is arranged on the side surface of the tooling main body.

5. The air inspection tooling for the vehicle-mounted charger housing according to claim 4, characterized in that, The dimension of one end of the tooling main body close to the rubber ring is larger than that of the other end.

6. The air inspection tooling for the vehicle-mounted charger housing according to claim 5, characterized in that, The limiting part includes a limiting head and a limiting ring. The limiting head is fixedly connected to the pull rod, and the dimension of the limiting head is larger than that of the pull rod. The limiting ring is sleeved on the pull rod.

7. The air inspection tooling for the vehicle-mounted charger housing according to claim 6, characterized in that A disassembly and assembly auxiliary structure is arranged on the limiting head.

8. The air inspection tooling for the vehicle-mounted charger housing according to claim 1, characterized in that, A deformation cavity is arranged at one end of the rubber ring close to the limiting part, and the deformation cavity is arranged around the axis of the rubber ring.

9. The air inspection tooling for the in-vehicle charger housing according to claim 1, characterized in that, Deformation notches are arranged on the inner wall of the rubber ring along its circumference.

10. A working method of the air inspection tooling for the vehicle-mounted charger housing according to any one of claims 1 to 9, characterized in that, Including the following steps: Position, clamp and fix the shell product to be tested; Insert the limiting part and the rubber ring into the hole structure, and the stepped part abuts against the end surface at the position of the hole structure. Ensure that the rubber ring is in its original length state during insertion; then, through the adjusting assembly, reduce the distance between the limiting part and the stepped part, and squeeze the rubber ring through the limiting part and the stepped part to cause the rubber ring to deform and expand, and then squeeze the inner wall of the hole structure to fix and seal the hole structure; Inflate the shell to the set test pressure; Conduct a pressure holding test, and detect the leakage amount after holding the pressure for a specified time; Based on the leakage amount detection, judge the result of the shell workpiece. At the same time, through the adjusting assembly, increase the distance between the limiting part and the stepped part to release the deformation of the rubber ring, and then exhaust and depressurize the shell, and then take out the workpiece to complete the airtight inspection operation of the shell workpiece.

Images