A helium detection device for motor housing

Abstract

This utility model relates to the field of automotive parts manufacturing technology, specifically disclosing a helium detection device for motor housings. The device includes a base plate with a placement platform on it. An annular flexible washer and a cylindrical body located within the washer are placed on the platform. A vent hole is formed on the top surface of the cylindrical body, communicating with a vent interface on the base plate. A set of positioning blocks is arranged around the flexible washer. A side-sealing mechanism for sealing side holes in the motor housing is provided on the base plate. An upper-sealing mechanism for sealing upper holes in the motor housing is provided above the cylindrical body. This helium detection device reduces helium consumption, thus lowering production costs, and offers high detection efficiency and accurate, reliable results.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts manufacturing technology, and in particular to a helium detection device for motor housing. Background Technology

[0002] During the manufacturing process of automotive motor housings, it is necessary to test the airtightness of the housing. The current testing method involves placing the motor housing on a platform with a sealing gasket, using a pressing mechanism to hold and fix the housing in place, and then using a sealing mechanism to seal the side holes of the housing. An air hole is created in the plug of the sealing mechanism to allow for vacuuming inside the housing, followed by filling with helium for helium testing. However, this testing method uses a large amount of helium, which is detrimental to cost control. Summary of the Invention

[0003] The purpose of this invention is to provide a helium detection device for motor housings, which can reduce the amount of helium used, thus reducing production costs, and has high detection efficiency and accurate and reliable results.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] A helium detector for motor housing includes a base plate, a placement platform on the base plate, an annular flexible washer and a columnar body located inside the flexible washer on the placement platform; an air hole is opened on the top surface of the columnar body, and the air hole communicates with a venting interface on the base plate; a set of positioning blocks are arranged around the flexible washer.

[0006] The base plate is provided with a side sealing mechanism for sealing the side holes of the motor housing; the column is provided with an upper sealing mechanism for sealing the upper holes of the motor housing.

[0007] Furthermore, the upper sealing mechanism includes a lifting plate, a lower pressure head, and an upper sealing drive component that drives the lifting plate to move up and down. The lower pressure head is movably disposed below the lifting plate, and a set of first springs is provided between the lower pressure head and the lifting plate.

[0008] Furthermore, an annular pressure block is movably arranged below the lifting plate, and a set of second springs is arranged between the annular pressure block and the lifting plate; the annular pressure block is provided with a clearance groove to avoid the lower pressure head.

[0009] Furthermore, a flexible gasket is provided on the bottom surface of the annular pressure block.

[0010] Furthermore, the side sealing mechanism includes a slide, a mounting base disposed on the slide, a side plug fixed on the mounting base, and a slide drive; the slide is slidably connected to the base plate, and the slide drive drives the slide to move toward or away from the columnar body.

[0011] Furthermore, the position of the mounting base on the slide is adjustable.

[0012] Furthermore, the top surface of the placement platform is provided with an annular groove, and the flexible washer and a limiting ring located on the outer periphery of the flexible washer are disposed in the annular groove.

[0013] Furthermore, a set of positioning blocks includes a second positioning block and a plurality of first positioning blocks spaced apart along the circumferential direction. The first positioning block has an arc-shaped positioning surface on the side facing the columnar body; the second positioning block has a positioning groove on the side facing the columnar body.

[0014] Furthermore, the positions of each of the first positioning blocks and the second positioning blocks on the placement platform are adjustable.

[0015] Furthermore, a marking mechanism is also provided on the base plate, the marking mechanism including a marking head and a marking drive component that drives the marking head to move toward or away from the columnar body.

[0016] The beneficial effects of this utility model are as follows: This utility model provides a helium detection device for motor housings. The motor housing to be tested is placed on a platform and positioned using a set of positioning blocks. A cylindrical body is located within the inner cavity of the motor housing, connected to the ventilation port and the inner cavity of the motor housing via an air hole. An upper sealing mechanism presses and seals the upper end of the motor housing, while a side sealing mechanism seals the side holes of the motor housing. The inner cavity of the motor housing is evacuated, and then helium is introduced for gas detection. This helium detection device for motor housings significantly reduces the amount of helium used, which helps reduce production costs, and it offers high detection efficiency and accurate, reliable results. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a helium detection device for motor housing provided by this utility model.

[0018] Figure 2 This is a structural diagram of the placement platform, flexible washer, columnar body, first positioning block and second positioning block.

[0019] Figure 3 This is a schematic diagram of the upper sealing mechanism.

[0020] Figure 4 This is a schematic diagram of the side sealing mechanism.

[0021] In the diagram: 1-Base plate; 2-Placement platform; 3-Flexible washer; 4-Columnar body; 41-Air hole; 5-Positioning block; 51-First positioning block; 511-Arc-shaped positioning surface; 52-Second positioning block; 521-Positioning groove; 6-Side sealing mechanism; 61-Slide table; 62-Mounting base; 63-Side plug; 64-Slide table drive component; 65-Adjusting screw; 7-Upper sealing mechanism; 71-Lifting plate; 72-Lower pressure head; 73-First spring; 74-Annular pressure block; 75-Second spring; 76-Flexible gasket; 8-Limiting ring; 9-Marking mechanism; 91-Marking head; 92-Marking drive component. Detailed Implementation

[0022] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0023] like Figures 1 to 4 As shown, a helium detector for motor housing includes a base plate 1, on which a placement platform 2 is provided. On the placement platform 2, an annular flexible washer 3 and a columnar body 4 located within the flexible washer 3 are provided. The top surface of the columnar body 4 has an air hole 41, which communicates with a venting interface provided on the base plate 1. A set of positioning blocks 5 are provided around the flexible washer 3. A side sealing mechanism 6 for sealing the side holes of the motor housing is provided on the base plate 1. An upper sealing mechanism 7 for sealing the upper holes of the motor housing is provided above the columnar body 4.

[0024] Specifically, such as Figure 2 As shown, in this embodiment, the top surface of the placement platform 2 has an annular groove, in which a flexible washer 3 and a limiting ring 8 located on the outer periphery of the flexible washer 3 are disposed. The lower end face of the motor housing is in close contact with the flexible washer 3, thereby achieving a seal on the lower port of the motor housing; the limiting ring 8 is used to limit the outer periphery of the flexible washer 3.

[0025] Furthermore, the columnar body 4 is configured to conform to the inner cavity of the motor housing so that the gap width between the columnar body 4 and the inner cavity wall of the motor housing is uniform.

[0026] like Figure 2 As shown, a set of positioning blocks 5 includes a second positioning block 52 and a plurality of first positioning blocks 51 arranged at intervals along the circumference; wherein, the first positioning block 51 is provided with an arc-shaped positioning surface 511 on the side facing the columnar body 4; the second positioning block 52 is provided with a positioning groove 521 on the side facing the columnar body 4.

[0027] Furthermore, the positions of the first positioning block 51 and the second positioning block 52 on the placement platform 2 are adjustable. In this embodiment, each of the first positioning block 51 and the second positioning block 52 has two oblong holes, and screws for screwing into the placement platform 2 are provided in the oblong holes. In use, the installation position of the first positioning block 51 or the second positioning block 52 can be adjusted by adjusting the position of the screws in the corresponding oblong holes.

[0028] In use, the lower end of the motor housing is positioned by using the first positioning block 51 and the second positioning block 52.

[0029] In this embodiment, as Figure 3 As shown, the upper sealing mechanism 7 includes a lifting plate 71, a lower pressure head 72, and an upper sealing drive component that drives the lifting plate 71 to move up and down. The lower pressure head 72 is movably positioned below the lifting plate 71 via a limiting guide rod, and a set of first springs 73 is provided between the lower pressure head 72 and the lifting plate 71. Preferably, the lower pressure head 72 is a flexible pressure head; the upper sealing drive component is preferably a cylinder.

[0030] Furthermore, an annular pressure block 74 is movably arranged below the lifting plate 71, and a set of second springs 75 is arranged between the annular pressure block 74 and the lifting plate 71; wherein, the annular pressure block 74 is provided with a relief groove to avoid the downward pressure head 72.

[0031] In use, driven by the upper sealing drive, the lifting plate 71 moves downward, causing the lower pressure head 72 and the annular pressure block 74 to move downward together. The annular pressure block 74 first contacts the upper end of the motor housing, pressing down to fix the motor housing. Continuing to move downward, the lower pressure head 72 contacts the upper end of the motor housing, thus sealing the upper end hole of the motor housing. Because a set of second springs 75 is provided, the motor housing can be firmly held and fixed without damaging it. Because a set of first springs 73 is provided, the upper end hole of the motor housing is kept in a good sealing state throughout the testing process.

[0032] Preferably, a flexible pad 76 is provided on the bottom surface of the annular pressure block 74 to prevent contact wear between the annular pressure block 74 and the motor housing.

[0033] In this embodiment, as Figure 4 As shown, the side sealing mechanism 6 includes a slide 61, a mounting base 62 disposed on the slide 61, a side plug 63 fixed on the mounting base 62, and a slide drive 64; wherein, the slide 61 is slidably connected to the base plate 1, and the slide drive 64 drives the slide 61 to move toward or away from the columnar body 4. The slide drive 64 is preferably a cylinder.

[0034] Furthermore, the position of the mounting base 62 on the slide table 61 is adjustable. In this embodiment, an adjusting screw 65 is screwed onto the slide table 61. One end of the adjusting screw 65 is screwed onto the mounting base 62. In use, by turning the adjusting screw 65, the position of the mounting base 62 on the slide table 61 can be adjusted, thereby adjusting the position of the side plug 63.

[0035] In this embodiment, the base plate 1 is also provided with a marking mechanism 9 for marking the qualified motor housing. The marking mechanism 9 includes a marking head 91 and a marking drive component 92 for driving the marking head 91 to move toward or away from the columnar body 4. The marking drive component 92 is preferably a cylinder.

[0036] This utility model discloses a helium detection device for motor housings. In use, the motor housing to be tested is placed on a placement platform 2 and positioned using a set of positioning blocks 5. A columnar body 4 is located inside the inner cavity of the motor housing, connected to the ventilation port and the inner cavity of the motor housing via an air hole 41. An upper sealing mechanism 7 presses and seals the upper end of the motor housing, while a side sealing mechanism 6 seals the side holes of the motor housing. The inner cavity of the motor housing is evacuated, and then helium is introduced for gas detection. After the gas detection is completed, a marking mechanism 9 marks the side of the motor housing. This helium detection device for motor housings significantly reduces the amount of helium used, which helps to reduce production costs, and it offers high detection efficiency and accurate and reliable results.

[0037] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without any inventive effort, and these embodiments will all fall within the scope of protection of this utility model.

Claims

1. A helium detection device for motor housing, characterized in that, Includes a base plate (1), on which a placement platform (2) is provided, and on which an annular flexible washer (3) and a columnar body (4) located inside the flexible washer (3) are provided; the top surface of the columnar body (4) is provided with an air hole (41), and the air hole (41) is connected to a ventilation port provided on the base plate (1); a set of positioning blocks (5) are provided around the flexible washer (3). The base plate (1) is provided with a side sealing mechanism (6) for sealing the side hole of the motor housing; the column (4) is provided with an upper sealing mechanism (7) for sealing the upper hole of the motor housing.

2. The helium detection device for motor housing according to claim 1, characterized in that, The upper sealing mechanism (7) includes a lifting plate (71), a lower pressure head (72), and an upper sealing drive component that drives the lifting plate (71) to move up and down. The lower pressure head (72) is movably disposed below the lifting plate (71), and a set of first springs (73) is provided between the lower pressure head (72) and the lifting plate (71).

3. The helium detection device for motor housing according to claim 2, characterized in that, A ring-shaped pressure block (74) is movably arranged below the lifting plate (71), and a set of second springs (75) is arranged between the ring-shaped pressure block (74) and the lifting plate (71); the ring-shaped pressure block (74) is provided with a clearance groove to avoid the lower pressure head (72).

4. The helium detection device for motor housing according to claim 3, characterized in that, The bottom surface of the annular pressure block (74) is provided with a flexible gasket (76).

5. A helium detection device for motor housing according to claim 1, characterized in that, The side sealing mechanism (6) includes a slide (61), a mounting base (62) disposed on the slide (61), a side plug (63) fixed on the mounting base (62), and a slide drive (64); the slide (61) is slidably connected to the base plate (1), and the slide drive (64) drives the slide (61) to move toward or away from the column (4).

6. A helium detection device for an electric motor housing according to claim 5, characterized in that, The position of the mounting base (62) on the slide (61) is adjustable.

7. A helium detector for motor housing according to claim 1, characterized in that, The top surface of the placement platform (2) is provided with an annular groove, and the flexible washer (3) and the limiting ring (8) located on the outer periphery of the flexible washer (3) are provided in the annular groove.

8. A helium detection device for motor housing according to claim 1, characterized in that, A set of positioning blocks (5) includes a second positioning block (52) and a plurality of first positioning blocks (51) spaced apart along the circumference. The first positioning block (51) has an arc-shaped positioning surface (511) on the side facing the column (4); the second positioning block (52) has a positioning groove (521) on the side facing the column (4).

9. A helium detection device for an electric motor housing according to claim 8, characterized in that, The positions of each of the first positioning blocks (51) and the second positioning blocks (52) on the placement platform (2) are adjustable.

10. A helium detection device for an electric motor housing according to any one of claims 1 to 9, characterized in that, The base plate (1) is also provided with a marking mechanism (9), which includes a marking head (91) and a marking drive (92) for driving the marking head (91) to move toward or away from the column (4).

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