Air tightness test equipment for MGU actuator

Abstract

The utility model relates to the MGU actuator detection field, and discloses an MGU actuator air tightness test device comprising a test bench which comprises a top support 1, a bottom support 2 and a vertical support connecting the support 1 and the support 2; the first support and the second support are arranged in parallel. A cylinder is arranged on the first support, a positioning frame is mounted at the lower end of a cylinder piston rod, a mounting seat is arranged on the second support, and a gas circuit is arranged in the middle of the mounting seat and communicated to the upper end of the mounting seat. The top of the mounting seat is provided with a matching part matched with a product, the matching part is sleeved with a sealing ring, and in an assembly state, the sealing ring abuts against the inner wall of the MGU actuator in a sealed mode; the air cylinder can drive the positioning frame to abut against a product installed on the installation base firmly, a gas circuit of the installation base is externally connected with vacuumizing equipment, and the vacuumizing equipment can vacuumize a product cavity to be in a vacuum state. The detection mechanism has the advantages of reliable and stable detection and the like.

Description

Technical Field

[0001] This utility model relates to the field of testing the MGU actuator motor of parking brake, and in particular to the airtightness testing equipment for MGU actuators. Background Technology

[0002] To ensure their lifespan, MGU products typically undergo airtightness testing. Current airtightness testing generally involves manual operation using a mold. During testing, the worker mounts the MGU product onto the mold support and then introduces compressed air, checking for airtightness by listening to sound or observing changes in air pressure. Alternatively, other vacuum methods can be used. This testing process is affected by the precision of the fit between the workpiece and the mold, and when changing products for testing, separate mold replacement is required. Summary of the Invention

[0003] This invention addresses the shortcomings of existing technologies by providing an airtightness testing device for MGU actuators.

[0004] To solve the above-mentioned technical problems, the present invention provides a solution through the following technical method:

[0005] The MGU actuator airtightness testing equipment includes a test bench, which includes a top support 1, a bottom support 2, and a vertical support connecting the support 1 and the support 2; the support 1 and the support 2 are arranged in parallel.

[0006] A cylinder is installed on bracket one, and a positioning bracket is installed at the lower end of the cylinder piston rod. A mounting base is installed on bracket two, and an air passage is provided in the middle of the mounting base, which is connected to the upper end of the mounting base.

[0007] The top of the mounting base is provided with a mating part that mates with the product. A sealing ring is fitted on the mating part. When assembled, the sealing ring seals against the inner wall of the MGU actuator.

[0008] The cylinder can drive the positioning frame to firmly hold the product installed on the mounting base. The air circuit of the mounting base is connected to a vacuum pump, which can evacuate the product chamber into a vacuum state.

[0009] Preferably, the positioning frame includes a fixed base, and a three-jaw pressure seat is detachably installed at the lower end of the fixed base. The end of the fixing column of the three-jaw pressure seat is provided with a rubber sleeve.

[0010] A guide shaft is installed on the fixed base, and a linear bearing is installed on the bracket. The linear bearing passes through the upper and lower ends of the bracket. The guide shaft cooperates with the linear bearing and passes through the linear bearing.

[0011] Preferably, the mounting base includes a base plate and a seat body mounted on the base plate. The mating part is located at the upper end of the seat body. The seat body and the base plate are detachably connected. An air port is provided on the side of the base plate. An air chamber is provided on the upper surface of the base plate. The air port communicates with the air chamber through a channel provided inside the base plate. A groove is provided around the upper end of the air chamber. A sealing ring is provided in the groove. The seat body is installed in the groove and achieves a sealed fit with the air chamber through the sealing ring.

[0012] Preferably, the middle part of the base is provided with a second channel, which passes through the base. The edge of the mating part is provided with a mounting ear. The mating part includes a protruding truncated cone. The circumferential side of the truncated cone is provided with a sealing groove for installing a sealing element. The sealing element is a rubber ring, including a sealing ring with a cylindrical lower section and a sealing lip at the top. The sealing ring and the sealing lip are connected by a connecting ring, which includes an outer rubber layer and an inner support frame.

[0013] Preferably, the sealing lip is trumpet-shaped.

[0014] Compared with existing technologies, this solution has the following advantages: the airtightness detection structure has high detection accuracy, high degree of automation, and can be matched with the detection of products of different sizes. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the device.

[0016] Figure 2 This is a schematic diagram of the overall structure of the device.

[0017] Figure 3 This is a schematic diagram of the overall structure of the device.

[0018] Figure 4 This is a schematic diagram of the overall structure of the device.

[0019] Figure 5 This is a schematic diagram of the sealing element.

[0020] The technical names of the reference numerals in the figure are as follows: 1—Test bench, 2—Support 1, 3—Support 2, 4—Vertical support, 5—Cylinder, 6—Positioning frame, 7—Mounting seat, 8—Matching part, 9—Fixed seat, 10—Three-jaw pressure seat, 11—Fixed column, 12—Guide shaft, 13—Linear bearing, 14—Base plate, 15—Seat body, 16—Air port, 17—Air chamber 1, 18—Channel 1, 19—Sinkhole, 20—Channel 2, 21—Mounting ear, 22—Sealing ring 1, 23—Sealing lip, 24—Support frame, 25—Connecting ring. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. Example 1

[0022] The MGU actuator airtightness testing equipment includes a test bench 1, which includes a top support 2, a bottom support 3, and a vertical support 4 connecting the support 2 and the support 3. The support 2 and the support 3 are arranged in parallel. The support 2 and the support 3 are both rectangular columnar members with rounded or chamfered edges. The support 2, the support 3, and the vertical support 4 form a C-shape with each other.

[0023] A cylinder 5 is mounted on bracket 2. Cylinder 5 is a plunger-type cylinder with a vertically oriented body. The piston rod extends from the lower end of bracket 2. A positioning frame 6 is mounted on the lower end of the piston rod of cylinder 5. The positioning frame 6 is used to press the product onto it, ensuring reliable product clamping. A mounting seat 7 is mounted on bracket 3. An air passage is provided in the middle of the mounting seat 7, connecting to the upper end of the mounting seat 7. The mounting seat 7 is used to mount the product and is located directly below the positioning frame 6.

[0024] The top of the mounting base 7 is provided with a mating part 8 that mates with the product. A sealing element 26 is fitted on the mating part 8. When assembled, the sealing element 26 seals against the inner wall of the MGU actuator.

[0025] Cylinder 5 can drive positioning frame 6 to firmly abut the product installed on mounting base 7. The air passage of mounting base 7 is connected to vacuum equipment, which can evacuate the product chamber into a vacuum state.

[0026] In this solution, the positioning frame 6 includes a fixed base 9, and a three-jaw pressure seat 10 is detachably installed at the lower end of the fixed base 9. The end of the fixing column 11 of the three-jaw pressure seat 10 is provided with a rubber sleeve. The purpose of using the rubber sleeve is to avoid damage to the product and to counteract problems such as jamming caused by initial unstable placement.

[0027] A guide shaft 12 is mounted on the fixed base 9, and a linear bearing 13 is mounted on the bracket 2. The linear bearing 13 passes through the upper and lower ends of the bracket 2. The guide shaft 12 cooperates with and passes through the linear bearing 13. This structural design ensures that the positioning frame 6 and the piston rod operate steadily and synchronously, reducing the risk of jamming.

[0028] The mounting base 7 includes a base plate 14 and a seat body 15 mounted on the base plate 14. A mating part 8 is located at the upper end of the seat body 15. The seat body 15 and the base plate 14 are detachably connected. An air port 16 is provided on the side of the base plate 14, and an air chamber 17 is provided on the upper surface of the base plate 14. The air port 16 communicates with the air chamber 17 through a channel 18 located inside the base plate 14. A groove 19 is provided around the upper end of the air chamber 17, and a sealing ring is provided within the groove 19. The seat body 15 is installed within the groove 19, and a sealing fit is achieved between it and the air chamber 17 through the sealing ring. This multi-position detachable design can accommodate more product requirements, enabling multi-purpose use, reducing equipment usage, and increasing reliability.

[0029] The base 15 has a second channel 20 in its middle, which passes through the base. The mating part 8 has a mounting ear 21 on its edge. The mating part 8 includes a protruding frustum, and a sealing groove for mounting a sealing element 26 is provided on the circumferential side of the frustum. The sealing element 26 is a rubber ring, including a cylindrical sealing ring 22 at the bottom and a sealing lip 23 at the top. The sealing ring 22 and the sealing lip 23 are connected by a connecting ring 25, which includes an outer rubber layer and an inner support frame 24. This solution uses a vacuum method to test airtightness, and the airtightness of the product is determined by reading changes in the vacuum level from the outside.

[0030] In this design, the sealing lip 23 is trumpet-shaped. The double-seal structure design ensures a complete seal between the product and the mating part 8, preventing deviations in test results due to inadequate sealing during installation.

[0031] The base plate 14 is also equipped with a support seat that supports the bottom of the product motor. The support seat is height adjustable and can be detached from the base plate 14.

[0032] During operation, the product is installed on the mating part 8, and then the positioning claw presses down against the upper part of the product to make the product and the mating part 8 fit tightly. Then, a vacuum is drawn on the air port 16 of the base plate 14 to conduct an airtightness test. After the test is completed, the positioning frame 6 is removed and the product is taken out; the next product is then tested.

Claims

1. An MGU actuator airtightness testing device, characterized in that: The test bench (1) includes a top support (2), a bottom support (3), and a vertical support (4) connecting the top support (2) and the bottom support (3); the top support (2) and the bottom support (3) are arranged in parallel. A cylinder (5) is installed on bracket 1 (2), and a positioning bracket (6) is installed at the lower end of the piston rod of the cylinder (5). A mounting seat (7) is installed on bracket 2 (3), and an air passage is provided in the middle of the mounting seat (7), which is connected to the upper end of the mounting seat (7). The top of the mounting base (7) is provided with a mating part (8) that mates with the product. A sealing element (26) is fitted on the mating part (8). When assembled, the sealing element (26) seals against the inner wall of the MGU actuator. The cylinder (5) can drive the positioning frame (6) to firmly press against the product installed on the mounting base (7). The air passage of the mounting base (7) is connected to a vacuum pump, which can evacuate the product chamber into a vacuum state.

2. The MGU actuator airtightness testing equipment according to claim 1, characterized in that: The positioning frame (6) includes a fixed seat (9), and a three-jaw pressure seat (10) is detachably installed at the lower end of the fixed seat (9). A rubber sleeve is provided at the end of the fixing column (11) of the three-jaw pressure seat (10). A guide shaft (12) is installed on the fixed base (9), and a linear bearing (13) is installed on the bracket (2). The linear bearing (13) passes through the upper and lower ends of the bracket (2). The guide shaft (12) cooperates with the linear bearing (13) and passes through the linear bearing (13).

3. The MGU actuator airtightness testing equipment according to claim 2, characterized in that: The mounting base (7) includes a base plate (14) and a seat body (15) mounted on the base plate (14). The mating part (8) is located at the upper end of the seat body (15). The seat body (15) and the base plate (14) are detachably connected. An air port (16) is provided on the side of the base plate (14). An air chamber (17) is provided on the upper surface of the base plate (14). The air port (16) is connected to the air chamber (17) through a channel (18) provided inside the base plate (14). A groove (19) is provided around the upper end of the air chamber (17). A sealing ring is provided in the groove (19). The seat body (15) is installed in the groove (19) and achieves a sealed fit with the air chamber (17) through the sealing ring.

4. The MGU actuator airtightness testing equipment according to claim 3, characterized in that: The middle part of the base (15) is provided with a second channel (20), which passes through the base. The side of the mating part (8) is provided with a mounting ear (21). The mating part (8) includes a protruding truncated cone. The circumferential side of the truncated cone is provided with a sealing groove for mounting a sealing element (26). The sealing element (26) is a rubber ring, including a sealing ring (22) with a cylindrical lower section and a sealing lip (23) at the top. The sealing ring (22) and the sealing lip (23) are connected by a connecting ring (25). The connecting ring (25) includes an outer rubber layer and an inner support frame (24).

5. The MGU actuator airtightness testing equipment according to claim 4, characterized in that: The sealing lip (23) is trumpet-shaped.

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