Speed reducer shell air tightness detection device

Abstract

The utility model relates to the technical field of air tightness detection, in particular to an air tightness detection device for a speed reducer shell. Comprising a base, an upper end sealing mechanism, an inflation pipe, a manual inflation mechanism and a detection mechanism. A second sealing gasket is arranged on the base; the upper end sealing mechanism comprises a pressing plate, a first sealing gasket installed at the bottom end of the pressing plate and a driving assembly used for driving the pressing plate to vertically move. The manual inflation mechanism is used for conveying gas to the inner side of the inflation pipe, the output end of the inflation pipe is located above the second sealing gasket, and a first one-way valve is installed on the inflation pipe; the detection mechanism comprises a transparent cylinder, a second piston plate and a second elastic reset assembly. The technical scheme has the advantages of simple structure, accurate test result, low manufacturing cost and low use cost.

Description

Technical Field

[0001] This utility model relates to the field of airtightness testing technology, and in particular to an airtightness testing device for a reducer housing. Background Technology

[0002] Before installation, the housing of a car reducer must undergo an airtightness test to prevent oil leaks and other problems after installation.

[0003] Existing airtightness testing devices typically include shaft end seals and differential end seals. The sealing effect of the two seals creates a cavity with a sealed structure inside the reducer housing. Pressure is then injected into the cavity using an air pump, and a pressure gauge or air pressure sensor is installed to monitor the pressure. After the pressurization process is completed, the sealing performance of the housing is determined based on whether the pressure changes. However, the above testing method uses an air pump, pressure gauge, and control equipment, resulting in a relatively complex structure and high testing costs. Utility Model Content

[0004] The purpose of this invention is to address the problems existing in the background technology by proposing a device for detecting the airtightness of a reducer housing.

[0005] The technical solution of this utility model is a device for detecting the airtightness of a reducer housing, comprising:

[0006] The base has a second sealing gasket.

[0007] The upper sealing mechanism includes a pressure plate, a first sealing gasket installed at the bottom of the pressure plate, and a drive assembly for driving the pressure plate to move vertically.

[0008] An inflation tube and a manual air pumping mechanism for supplying gas to the inside of the inflation tube, the output end of the inflation tube being located above the second sealing gasket, and a first one-way valve being installed on the inflation tube;

[0009] The testing mechanism includes a transparent cylinder, a second piston plate, and a second elastic reset assembly. The transparent cylinder is mounted on the pressure plate and passes through the first sealing gasket. The bottom end of the transparent cylinder is open. An upper limit ring and a lower limit ring are respectively provided at the upper and lower ends of the inner side of the transparent cylinder. The second piston plate is movably located inside the transparent cylinder. A second sealing ring is provided on the periphery of the second piston plate. The second piston plate is elastically connected to the transparent cylinder through the second elastic reset assembly.

[0010] Preferably, a clamping mechanism is installed around the base, and a first sliding groove is provided around the base. The clamping mechanism includes a clamping block, a second threaded rod, and a second rotating handle. The bottom end of the clamping block is slidably installed in the first sliding groove on the corresponding side, and the second threaded rod is rotatably installed in the first sliding groove on the corresponding side. The clamping block is threadedly connected to the second threaded rod, and the second rotating handle is located at the outer end of the second threaded rod.

[0011] Preferably, the manual inflation mechanism includes an inflation cylinder, a first piston plate, an air inlet pipe, a second one-way valve, a first piston rod, a push plate, and a first elastic reset assembly. The inflation cylinder is mounted on a base, and both the inflation pipe and the air inlet pipe are connected to the interior of the inflation cylinder. The second one-way valve is mounted on the air inlet pipe. The first piston plate is movably disposed on the inner side of the inflation cylinder, and a first sealing ring is provided on the periphery of the first piston plate. The first piston plate is elastically connected to the inflation cylinder through the first elastic reset assembly. The first piston rod movably passes through the inner and outer sides of the inflation cylinder, and its two ends are respectively connected to the first piston plate and the push plate.

[0012] Preferably, the first elastic reset assembly includes a first guide rod and a first spring. The first guide rod is disposed inside the inflation cylinder, the first piston plate is slidably disposed on the first guide rod, and the first spring is sleeved and installed on the lower part of the first guide rod.

[0013] Preferably, a scale strip is provided on the outer wall of the transparent cylinder; the transparent cylinder is a transparent tempered glass cylinder.

[0014] Preferably, the drive assembly includes a slide plate, a connecting slider, a first threaded rod, and a first rotating handle. The slide plate is mounted on the base, and a second slide groove is vertically formed on the slide plate. The first threaded rod is rotatably mounted on the inner side of the second slide groove. The upper end of the first threaded rod extends above the slide plate and is connected to the first rotating handle. The end of the connecting slider is slidably mounted on the inner side of the second slide groove and is threadedly connected to the first threaded rod. The other end of the connecting slider is connected to the pressure plate.

[0015] Preferably, the second elastic reset assembly includes a second guide rod and a second spring. The second guide rod movably passes through the upper end of the transparent cylinder and is connected to the second piston plate. The second spring is sleeved and installed on the second guide rod.

[0016] Compared with the prior art, the present invention has the following beneficial technical effects: The present invention judges the sealing performance of the reducer housing by means of manual sealing, manual air injection and visual inspection. Its structure is simple, the test results are accurate, and the manufacturing and use costs are low, making it highly practical. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 This is a cross-sectional view of the transparent cylinder in this utility model.

[0019] Figure 3 This is a cross-sectional view of the air-filled cylinder in this utility model.

[0020] Reference numerals: 1. Base; 101. First slide groove; 2. Inflatable cylinder; 3. Transparent cylinder; 4. Pressure plate; 5. First sealing gasket; 6. Slide groove plate; 601. Second slide groove; 7. Connecting slider; 8. Second sealing gasket; 9. Pressing block; 10. Scale bar; 11. First threaded rod; 12. First rotating handle; 13. Second threaded rod; 14. Second rotating handle; 15. First piston plate; 161. Inflating pipe; 162. Inlet pipe; 172. Second one-way valve; 18. First piston rod; 19. Push plate; 20. First guide rod; 21. First spring; 22. Second piston plate; 23. First sealing ring; 24. Second sealing ring; 25. Lower limit ring; 26. Upper limit ring; 27. Second guide rod; 28. Second spring. Detailed Implementation

[0021] Example 1

[0022] like Figures 1-3 As shown in the figure, the reducer housing air tightness testing device proposed in this embodiment includes a base 1, an upper sealing mechanism, an air inlet pipe 161, a manual air pumping mechanism, and a testing mechanism.

[0023] A second sealing gasket 8 is provided on the base 1; the upper sealing mechanism includes a pressure plate 4, a first sealing gasket 5 installed at the bottom of the pressure plate 4, and a driving assembly for driving the pressure plate 4 to move vertically. The driving assembly includes a sliding plate 6, a connecting slider 7, a first threaded rod 11, and a first rotating handle 12. The sliding plate 6 is provided on the base 1, and a second sliding groove 601 is vertically opened on the sliding plate 6. The first threaded rod 11 is rotatably installed on the inner side of the second sliding groove 601. The upper end of the first threaded rod 11 extends to the top of the sliding plate 6 and is connected to the first rotating handle 12. The end of the connecting slider 7 is slidably installed on the inner side of the second sliding groove 601 and is threadedly connected to the first threaded rod 11. The other end of the connecting slider 7 is connected to the pressure plate 4. By adjusting the rotation direction of the first threaded rod 11, the connecting slider 7 can be driven to move up and down.

[0024] The manual inflation mechanism is used to supply gas to the inside of the inflation tube 161. The manual inflation mechanism includes an inflation cylinder 2, a first piston plate 15, an inlet pipe 162, a second one-way valve 172, a first piston rod 18, a push plate 19, and a first elastic reset assembly. The inflation cylinder 2 is mounted on the base 1. Both the inflation tube 161 and the inlet pipe 162 are connected to the inside of the inflation cylinder 2. The second one-way valve is mounted on the inlet pipe 162. The first piston plate 15 is movably disposed inside the inflation cylinder 2. A first sealing ring 23 is provided around the periphery of the first piston plate 15. The first piston plate 15 is elastically connected to the inflation cylinder 2 through the first elastic reset assembly. The first elastic reset assembly includes a first guide rod 20 and a first spring 21. The first guide rod 20 is disposed inside the inflation cylinder 2, and the first piston plate 15 slides... To ensure the sealing between the first piston plate 15 and the first guide rod 20, a sealing ring is provided on the outer periphery of the first guide rod 20, and the sealing ring is installed on the first piston plate. The first spring 21 is sleeved and installed on the lower part of the first guide rod 20. The first elastic reset component is provided to drive the first piston plate 15 to reset. A hole for the first piston rod 18 to pass through is provided at the upper end of the inflation cylinder 2, and the diameter of the hole is larger than the diameter of the first piston rod 18 to ensure the normal discharge of gas in the upper part of the inner cavity of the inflation cylinder 2. The first piston rod 18 moves through the inner and outer sides of the inflation cylinder 2 and its two ends are connected to the first piston plate 15 and the push plate 19 respectively. The output end of the inflation pipe 161 is located above the second sealing gasket 8, and a first one-way valve is installed on the inflation pipe 161.

[0025] The testing mechanism includes a transparent cylinder 3, a second piston plate 22, and a second elastic reset assembly. The transparent cylinder 3 is mounted on the pressure plate 4 and passes through the first sealing gasket 5. The bottom end of the transparent cylinder 3 is open. An upper limit ring 26 and a lower limit ring 25 are respectively provided at the upper and lower ends of the inner side of the transparent cylinder 3. The second piston plate 22 is movably disposed inside the transparent cylinder 3. A second sealing ring 24 is provided on the periphery of the second piston plate 22. The second piston plate 22 is elastically connected to the transparent cylinder 3 through the second elastic reset assembly. The second elastic reset assembly includes a second guide rod 27 and a second spring. 28. The second guide rod 27 movably passes through the upper end of the transparent cylinder 3 and is connected to the second piston plate 22. The second spring 28 is sleeved on the second guide rod 27. The upper end of the transparent cylinder 3 has an opening for the second guide rod 27 to pass through. The diameter of the opening is larger than the diameter of the second guide rod 27. The purpose of this structure is to ensure normal air outlet at the upper end of the inner cavity of the transparent cylinder 3. A scale strip 10 is provided on the outer wall of the transparent cylinder 3. The scale strip 10 allows the operator to accurately judge the downward movement of the second piston plate 22. The transparent cylinder 3 is a transparent tempered glass cylinder.

[0026] Specifically, when testing the reducer housing, the reducer housing is placed on the second sealing gasket 8 with the differential end opening facing downwards. The position of the reducer housing is adjusted so that the shaft end opening of the reducer housing is vertically aligned with the first sealing gasket 5. Then, the pressure plate 4 is driven downwards by the set drive assembly. The movement of the pressure plate 4 causes the first sealing gasket 5 to move, and the first sealing gasket 5 is pressed against the shaft end opening of the reducer housing. At this time, the second sealing gasket 8 and the first sealing gasket 5 respectively seal the differential end opening and the shaft end opening of the reducer housing, so that the inner cavity of the reducer housing forms a sealed structure.

[0027] The reducer housing is inflated by a manual air pumping mechanism. The specific operation is as follows: Pushing the first piston rod 18 downward moves the first piston plate 15 downward, allowing the gas inside the inflation cylinder 2 to enter the cavity of the reducer housing through the inflation pipe 161. Due to the increased air pressure inside the reducer housing, the second piston plate 22 moves upward. The first one-way valve prevents the gas inside the reducer housing from flowing back. After releasing the push plate 19, the first piston plate 15 is driven to reset under the elastic force of the first spring 21. At this time, external gas enters the bottom cavity of the inflation cylinder 2 through the air inlet pipe 162. The air inlet pipe 162 only allows gas to flow from the outside into the interior of the inflation cylinder 2. This cycle repeats until the second piston plate 22 contacts the upper limit ring 26. At this time, the second piston plate 22 moves to the limited position, and the air pumping stops.

[0028] After waiting for a period of time, the operator observes the position corresponding to the first piston plate 15 to determine whether the first piston plate 15 has shifted. If the first piston plate 15 has shifted, it indicates that there is air leakage inside the reducer housing; otherwise, it proves that the reducer housing is well sealed.

[0029] Example 2

[0030] like Figure 1 As shown in the figure, the airtightness testing device for a reducer housing proposed in this embodiment differs from that in Embodiment 1. In this embodiment, clamping mechanisms are installed around the base 1, and first sliding grooves 101 are provided around the base 1. The clamping mechanisms include abutting blocks 9, a second threaded rod 13, and a second rotating handle 14. The bottom end of the abutting block 9 is slidably installed in the first sliding groove 101 on the corresponding side, and the second threaded rod 13 is rotatably installed in the first sliding groove 101 on the corresponding side. The abutting block 9 is threadedly connected to the second threaded rod 13, and the second rotating handle 14 is located at the outer end of the second threaded rod 13. Before sealing the upper end of the reducer housing, the clamping mechanisms around the base are adjusted so that the abutting blocks 9 on each side are pressed against the base of the reducer housing. This improves the fixing effect of the reducer housing, prevents horizontal displacement during the test, and ensures the airtightness of the reducer housing.

[0031] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A device for detecting the airtightness of a reducer housing, characterized in that, include: A base (1) is provided with a second sealing gasket (8); The upper sealing mechanism includes a pressure plate (4), a first sealing gasket (5) installed at the bottom of the pressure plate (4), and a drive assembly for driving the pressure plate (4) to move vertically. An inflation tube (161) and a manual air pumping mechanism for supplying gas to the inside of the inflation tube (161), the output end of the inflation tube (161) being located above the second sealing gasket (8), and a first one-way valve being installed on the inflation tube (161); The testing mechanism includes a transparent cylinder (3), a second piston plate (22), and a second elastic reset assembly. The transparent cylinder (3) is mounted on the pressure plate (4). The transparent cylinder (3) passes through the first sealing gasket (5). The bottom end of the transparent cylinder (3) is open. The upper and lower ends of the inner side of the transparent cylinder (3) are respectively provided with an upper limit ring (26) and a lower limit ring (25). The second piston plate (22) is movably located inside the transparent cylinder (3). The second piston plate (22) is provided with a second sealing ring (24) on its periphery. The second piston plate (22) is elastically connected to the transparent cylinder (3) through the second elastic reset assembly.

2. The reducer housing airtightness testing device according to claim 1, characterized in that, A clamping mechanism is installed around the base (1), and a first sliding groove (101) is opened around the base (1). The clamping mechanism includes a clamping block (9), a second threaded rod (13), and a second rotating handle (14). The bottom end of the clamping block (9) is slidably installed in the first sliding groove (101) on the corresponding side. The second threaded rod (13) is rotatably installed in the first sliding groove (101) on the corresponding side. The clamping block (9) is threadedly connected to the second threaded rod (13). The second rotating handle (14) is located at the outer end of the second threaded rod (13).

3. The reducer housing airtightness testing device according to claim 1, characterized in that, The manual air-inflating mechanism includes an air cylinder (2), a first piston plate (15), an air inlet pipe (162), a second one-way valve (172), a first piston rod (18), a push plate (19), and a first elastic reset assembly. The air cylinder (2) is mounted on a base (1). The air inlet pipe (161) and the air inlet pipe (162) are both connected to the interior of the air cylinder (2). The second one-way valve is mounted on the air inlet pipe (162). The first piston plate (15) is movably located on the inner side of the air cylinder (2). A first sealing ring (23) is provided on the periphery of the first piston plate (15). The first piston plate (15) is elastically connected to the air cylinder (2) through the first elastic reset assembly. The first piston rod (18) movably passes through the inner and outer sides of the air cylinder (2), and its two ends are respectively connected to the first piston plate (15) and the push plate (19).

4. The gearbox housing airtightness testing device according to claim 3, characterized in that, The first elastic reset assembly includes a first guide rod (20) and a first spring (21). The first guide rod (20) is disposed on the inner side of the inflation cylinder (2). The first piston plate (15) is slidably disposed on the first guide rod (20). The first spring (21) is sleeved and installed on the lower part of the first guide rod (20).

5. The gearbox housing airtightness testing device according to claim 1, characterized in that, The outer wall of the transparent cylinder (3) is provided with a scale strip (10); the transparent cylinder (3) is a transparent tempered glass cylinder.

6. The reducer housing airtightness testing device according to claim 1, characterized in that, The drive assembly includes a slide plate (6), a connecting slider (7), a first threaded rod (11), and a first rotating handle (12). The slide plate (6) is mounted on the base (1). A second slide groove (601) is vertically opened on the slide plate (6). The first threaded rod (11) is rotatably mounted on the inner side of the second slide groove (601). The upper end of the first threaded rod (11) extends to the top of the slide plate (6) and is connected to the first rotating handle (12). The end of the connecting slider (7) is slidably mounted on the inner side of the second slide groove (601) and is threadedly connected to the first threaded rod (11). The other end of the connecting slider (7) is connected to the pressure plate (4).

7. The reducer housing airtightness testing device according to claim 1, characterized in that, The second elastic reset assembly includes a second guide rod (27) and a second spring (28). The second guide rod (27) is movably inserted through the upper end of the transparent cylinder (3) and connected to the second piston plate (22). The second spring (28) is sleeved and installed on the second guide rod (27).

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