New energy automobile inverter shell air tightness detection clamp

Abstract

The utility model relates to an air tightness detection clamp for a new energy automobile inverter housing. The air tightness detection clamp comprises a transmission member, a top plate, a lifting plate, an upper sealing plate, a bottom plate, a material clamping seat and a sealing assembly. The bottom plate is provided with a material clamping seat positioning block; the clamping seat is provided with a plurality of second profiling blocks and workpiece positioning blocks; the material clamping seat is provided with a plurality of sealing assemblies; a profiling groove is formed in the bottom of the upper sealing plate, and a second sealing ring is arranged on the outer ring of the profiling groove. A plurality of first profiling blocks are arranged in the profiling groove; the material pressing piece comprises a first spring, a pressing rod, a connecting piece, a cushion block and a connecting shaft. The air tightness detection device has the advantages that the upper sealing plate, the sealing assembly and the material clamping seat seal and position the shell, so that displacement of the shell during air tightness detection is reduced, and the detection accuracy is improved; the device is simple in structure and convenient to operate, improves the sealing capability of the workpiece before detection by sealing the slotted hole in the side wall of the workpiece and then pressing the top surface of the workpiece downwards, and reduces the influence of the slotted hole of the workpiece on the air tightness detection result.

Description

Technical Field

[0001] This utility model relates to the field of aluminum casting testing technology, and in particular to a fixture for testing the airtightness of inverter housings for new energy vehicles. Background Technology

[0002] Inverters in automobiles primarily convert direct current (DC) to alternating current (AC) to power onboard electrical equipment. With the development of automotive electrification and intelligence, inverters play a crucial role in new energy vehicles. In new energy vehicles, the inverter is one of the core components, mainly used for driving the motor and energy management. Airtightness testing of the inverter housing is a critical step in ensuring the quality and reliability of inverter products. The main purpose of airtightness testing is to verify whether the housing can effectively prevent external contaminants (such as water, dust, oil, etc.) from entering the interior, while also preventing internal gas or liquid leakage.

[0003] During airtightness testing, in order to ensure the accuracy of the test results, it is necessary to seal the slots on the casing. The casing wall has a large number of slots. Since the inverter casing is generally made of aluminum, which is relatively soft, there is a problem of wear on the outer wall of the casing when clamping and sealing it. Utility Model Content

[0004] The purpose of this utility model is to provide a fixture for testing the air tightness of inverter housings in new energy vehicles, which can avoid wear on the housing without affecting the air tightness test results.

[0005] To achieve the above-mentioned utility model objectives, this utility model provides a new energy vehicle inverter housing airtightness testing fixture, including a transmission component, a top plate, a lifting plate, an upper sealing plate, a bottom plate, a clamping seat, and a sealing assembly;

[0006] The base plate is provided with one or more "L"-shaped clamping seat positioning blocks;

[0007] The clamping seat is provided with several second contour blocks and workpiece positioning blocks;

[0008] The clamping seat is provided with several sealing components, each including a cylinder and a contour sealing block, the cylinder being connected to the contour sealing block;

[0009] The transmission component is connected to the top of the top plate, and the bottom of the top plate is provided with a linear guide rail. The lifting plate is connected between the top plate and the bottom plate through the linear guide rail, and the piston rod of the transmission component is connected to the lifting plate.

[0010] The upper sealing plate is located at the bottom of the lifting plate. The bottom of the upper sealing plate is provided with a contour groove, and the outer ring of the contour groove is provided with a second sealing ring. A plurality of first contour blocks are provided inside the contour groove.

[0011] The first contour block located in the middle of the contour groove is equipped with a pressure element.

[0012] Preferably, the pressing component includes a first spring, a pressing rod, a connecting member, a pad, and a connecting shaft. The pressing rod is connected to the corresponding first contour block via the first spring. The connecting shaft is fixed inside the corresponding first contour block. The side wall of the pressing rod is provided with a connecting groove. The pressing rod is connected to the connecting shaft via the connecting groove. The pad is connected to the end of the pressing rod via the connecting member.

[0013] As a further improvement to the utility model, a first limiting rod is provided at the bottom of the top plate.

[0014] As a further improvement of the utility model, the clamping seat is provided with handrails on both sides, and the bottom plate is provided with a clearance groove on the side.

[0015] As a further improvement to the utility model, the contour sealing block is provided with a first sealing ring.

[0016] As a further improvement of the utility model, the bottom of the lifting plate is provided with a grooved positioning rod, and the clamping seat is provided with a positioning head. The grooved positioning rod and the positioning head are coaxially arranged.

[0017] As a further improvement to the utility model, the clamping seat is provided with a second limiting rod in the vertical direction.

[0018] As a further improvement to the utility model, a pressure sensor is provided between the lifting plate and the transmission component.

[0019] This utility model discloses a new energy vehicle inverter housing airtightness testing fixture. The workpiece is positioned on a clamping seat, which is then placed on a base plate. A sealing assembly seals the side wall slots of the workpiece. The transmission component can be an existing booster cylinder. A pre-press stroke is performed, lowering the upper sealing plate. After the pressure component contacts the bottom surface of the workpiece, the booster cylinder performs a boost stroke, continuing to press down the upper sealing plate. This causes the upper sealing ring to tightly press against the opening at the edge of the workpiece. Simultaneously, the first contour block tightly plugs into the corresponding slot on the top surface of the workpiece, completing the sealing of the top surface of the workpiece. The pressure component acts as a support, preventing excessive force on the edge of the workpiece's top surface, thus avoiding damage.

[0020] The advantages of this utility model's new energy vehicle inverter housing airtightness testing fixture compared to existing technologies are:

[0021] (1) The upper sealing plate, sealing components and clamping seat seal and position the housing, reduce the displacement of the housing during airtightness testing and improve the accuracy of testing;

[0022] (2) The structure is simple and the operation is convenient. By first sealing the groove holes on the side wall of the workpiece and then pressing down to seal the top surface of the workpiece, the sealing ability of the workpiece before testing is improved, and the influence of the groove holes on the airtightness test results is reduced. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the airtightness testing fixture for the housing of a new energy vehicle inverter according to this utility model.

[0024] Figure 2 This is a schematic diagram of the base plate structure;

[0025] Figure 3 This is a schematic diagram of the clamping seat structure;

[0026] Figure 4 This is a schematic diagram of the first sealing ring structure;

[0027] Figure 5 This is a schematic diagram of the upper sealing plate structure;

[0028] Figure 6 This is a schematic diagram of the pressure component structure. Detailed Implementation

[0029] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0030] like Figure 1 As shown, the new energy vehicle inverter housing air tightness testing fixture of this utility model includes a transmission component 1, a top plate 2, a lifting plate 3, an upper sealing plate 4, a bottom plate 6, a clamping seat 7, and a sealing assembly 8.

[0031] like Figure 2-3 As shown, the base plate 6 is provided with one or more "L"-shaped clamping seat positioning blocks 61. The corner of the clamping seat 7 is embedded in the "L"-shaped clamping seat positioning block 61, which plays a positioning role for the clamping seat 7 and prevents the clamping seat 7 from sliding.

[0032] Handrails 71 are provided on both sides of the clamping seat 7 to facilitate placing the clamping seat 7 at the target position on the base plate 6. The side of the base plate 6 is provided with a clearance groove 62, which provides clearance space for the handrails 71, making it convenient for the operator to place and pick up the clamping seat 7.

[0033] The clamping seat 7 is provided with several second contour blocks 72 and workpiece positioning blocks 75; the number, shape and position of the second contour blocks 72 are adapted to the slots on the bottom surface of the workpiece 9, and the position of the workpiece positioning blocks 75 is set according to the size of the workpiece 9. The bottom surface of the workpiece 9 is blocked by the second contour blocks 72, and the outer wall of the workpiece 9 is positioned between the various workpiece positioning blocks 75, thereby completing the sealing and positioning of the bottom surface of the workpiece 9.

[0034] The clamping seat 7 is equipped with several sealing components 8. The number and position of the sealing components 8 are adapted to the position and number of slots in the side wall of the actual workpiece 9. Each sealing component 8 includes a cylinder 81 and a contour sealing block 82. The cylinder 81 is connected to the contour sealing block 82, which seals the slots in the side wall of the workpiece 9. Figure 4 As shown, the contour sealing block 82 is provided with a first sealing ring 83, which improves the sealing ability of the contour sealing block 82 to the groove hole on the side wall of the workpiece 9.

[0035] The transmission component 1 is connected to the top of the top plate 2, and the bottom of the top plate 2 is provided with a linear guide rail 21. The lifting plate 3 is connected between the top plate 2 and the bottom plate 6 through the linear guide rail 21. The piston rod of the transmission component 1 is connected to the lifting plate 3.

[0036] The lifting plate 3 moves up and down along the linear guide rail 21 under the action of the transmission component 1. The linear guide rail 21 guides the lifting plate 3. The bottom of the top plate 2 is provided with a first limit rod 22, which limits the rising and resetting position of the lifting plate 3 to avoid misoperation that could cause the lifting plate 3 to collide with the top plate 2 and affect the service life of various components.

[0037] The upper sealing plate 4 is located at the bottom of the lifting plate 3, such as Figure 5 As shown, the bottom of the upper sealing plate 4 is provided with a contour groove 41, and the outer ring of the contour groove 41 is provided with a second sealing ring 43; a number of first contour blocks 42 are provided in the contour groove 41, and the position and shape of the first contour blocks 42 are adapted to the slots on the top surface of the workpiece 9.

[0038] As the lifting plate 3 descends, the upper sealing plate 4 and each of the first contour blocks 42 are embedded in the slots on the top surface of the workpiece 9. The second sealing ring 43 seals the edge of the top surface of the workpiece 9, thus sealing the top surface of the workpiece 9.

[0039] The first contour block 42 located in the middle of the contour groove 41 is equipped with a pressure member 5, such as Figure 6 As shown, the pressure component 5 includes a first spring 51, a pressure rod 52, a connector 53, a pad 54, and a connecting shaft 55. The pressure rod 52 is connected to the corresponding first contour block 42 through the first spring 51. The connecting shaft 55 is fixed in the corresponding first contour block 42. The side wall of the pressure rod 52 is provided with a connecting groove 521. The pressure rod 52 is connected to the connecting shaft 55 through the connecting groove 521. The pad 54 is connected to the end of the pressure rod 52 through the connector 53.

[0040] After the pressure rod 52 contacts the bottom surface of the workpiece 9, it continues to be pressed by the transmission component 1. The pressure rod 52 then moves linearly along the connecting shaft 55 through the connecting groove 521, balancing the pressure of the upper sealing plate 4 on the workpiece 9. The first spring 51 serves to reset the pressure rod 52.

[0041] This utility model discloses a new energy vehicle inverter housing airtightness testing fixture. The workpiece 9 is positioned on the clamping seat 7, and the clamping seat 7 is placed on the base plate 6. The side wall slot of the workpiece 9 is sealed by the sealing component 8. The transmission component 1 can be an existing booster cylinder. First, a pre-press stroke is performed to move the upper sealing plate 4 down. After the pressing component 5 contacts the bottom surface of the workpiece 9, the booster cylinder performs a boost stroke and continues to press down the upper sealing plate 4, so that the upper sealing ring 4 tightly presses the opening at the edge of the workpiece 9. At the same time, the first contour block 42 tightly plugs into the corresponding slot on the top surface of the workpiece 9, completing the sealing work on the top surface of the workpiece 9. Among them, the pressing component 5 plays a supporting role to prevent the edge of the top surface of the workpiece 9 from being damaged due to excessive force.

[0042] The bottom of the lifting plate 3 is vertically provided with a grooved positioning rod 31, and the clamping seat 7 is vertically provided with a positioning head 73. The grooved positioning rod 31 and the positioning head 73 are coaxially arranged. When the lifting plate 3 descends, the positioning head 73 is inserted into the groove at the bottom of the descending grooved positioning rod 31 to complete the positioning and fitting, so that the upper sealing plate 4 and the workpiece 9 are precisely connected, ensuring the sealing ability of the upper sealing plate 4 for the workpiece 9.

[0043] The clamping seat 7 is vertically provided with a second limiting rod 74. The second limiting rod 74 can limit the extreme position of the lifting plate 3's descent, so as to avoid the lifting plate 3's descent stroke being too large due to operational errors, and the upper sealing plate 4 at its bottom damaging the workpiece 9.

[0044] A pressure sensor 11 is provided between the lifting plate 3 and the transmission component 1. The pressure sensor 11 monitors the pressure of the transmission component 1 on the lifting plate 3 during the two strokes in real time to prevent the workpiece 9 from being subjected to excessive pressure.

[0045] The preferred embodiments of this utility model have been described in detail above, but this utility model is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of this utility model, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A new energy vehicle inverter shell airtightness detection clamp, characterized in that, The transmission, the top plate, the lifting plate, the upper sealing plate, the bottom plate, the clamping seat and the sealing assembly are included. The bottom plate is provided with more than one "L" shaped clamping seat positioning block. The clamping seat is provided with a plurality of second profiling blocks and workpiece positioning blocks. The clamping seat is provided with a plurality of sealing assemblies, and the sealing assembly includes a pneumatic cylinder and a profiling sealing block. The transmission is connected to the top of the top plate, the bottom of the top plate is provided with a linear guide rail, the lifting plate is connected between the top plate and the bottom plate through the linear guide rail, and the piston rod of the transmission is connected to the lifting plate. The upper sealing plate is located at the bottom of the lifting plate, the bottom of the upper sealing plate is provided with a profiling groove, the outer ring of the profiling groove is provided with a second sealing ring, and a plurality of first profiling blocks are arranged in the profiling groove. The first profiling blocks located in the middle of the profiling groove are provided with pressing pieces.

2. The new energy vehicle inverter shell air tightness detection clamp of claim 1, wherein, The pressing piece includes a first spring, a pressing rod, a connecting piece, a pad and a connecting shaft, the pressing rod is connected to the corresponding first profiling block through the first spring, the connecting shaft is fixed in the corresponding first profiling block, the side wall of the pressing rod is provided with a connecting groove, the pressing rod is connected to the connecting shaft through the connecting groove, and the pad is connected to the end of the pressing rod through the connecting piece.

3. The new energy vehicle inverter shell air tightness detection clamp of claim 1, wherein, The bottom of the top plate is provided with a first limiting rod.

4. The new energy vehicle inverter shell air tightness detection clamp of claim 1, wherein, Both sides of the clamping seat are provided with handrails, and the side edges of the bottom plate are provided with accommodation grooves.

5. The new energy vehicle inverter shell air tightness detection clamp of claim 1, wherein, The profiling sealing block is provided with a first sealing ring.

6. The new energy vehicle inverter shell air tightness detection clamp of claim 1, wherein, The bottom of the lifting plate is vertically provided with a grooved positioning rod, the clamping seat is vertically provided with a positioning head, and the grooved positioning rod and the positioning head are coaxially arranged.

7. The new energy vehicle inverter shell air tightness detection clamp of claim 1, wherein, The clamping seat is vertically provided with a second limiting rod.

8. The new energy vehicle inverter shell air tightness detection clamp of claim 1, wherein, The lifting plate and the transmission are provided with a pressure sensor therebetween.

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