A device for detecting the sealing performance of automobile shock absorber housing

Abstract

The invention relates to the technical field of automobile parts detection equipment, and specifically discloses a sealing detection device for an automobile shock absorber housing, comprising: a detection seat, a positioning mechanism, a limiting mechanism and a sealing mechanism; a plurality of detection seats are installed on a pedestal along the left-right direction, a limiting mechanism is installed on the detection seat along the front-back direction, a sealing mechanism is arranged at the opening end of a housing to seal the housing, a plurality of positioning mechanisms keep the housing and the sealing mechanism coaxial, the housing is placed on the adjusted positioning mechanism, the housing is sealed by a sealing mechanism arranged at the opening end of the housing, and an air pressure detection component is opened to perform sealing detection on the housing; a sealing detection device for an automobile shock absorber housing of the invention solves the problem that the existing sealing pad has a small force-bearing area and is easily damaged when subjected to large force by extending a flexible pad into the housing.

Description

Technical Field

[0001] The invention relates to the technical field of automobile parts testing equipment, and in particular to a sealing testing device for an automobile shock absorber housing. Background Art

[0002] Shock absorbers are used to suppress the shock caused by the rebound of springs after absorbing shock and the impact from the road surface. They are used in automobiles to accelerate the attenuation of the vibration of the frame and body to improve the driving smoothness of the car. It achieves the purpose of shock absorption by converting the kinetic energy of the impact into another form of energy and then dissipating it. Therefore, when using automobile shock absorbers, it is necessary to use a sealing detection device to detect the shock absorber housing to ensure the sealing of the hydraulic oil or gas stored inside the shock absorber housing. In the process of testing the sealing of the automobile shock absorber housing, the existing detection method is usually to inflate the shock absorber housing and immerse it in water, and then determine whether the shock absorber housing is well sealed by observing whether bubbles are generated. However, this detection method is not only cumbersome to operate when placing and removing the shock absorber housing, but also cannot meet the detection needs of large quantities of shock absorber housings.

[0003] A Chinese patent application document with publication number CN118275061A discloses a device for detecting the sealing performance of an automobile shock absorber housing, comprising a detection seat, a U-shaped frame symmetrically installed on both sides of the upper end of the detection seat, a rotating shaft rotatably installed on the U-shaped frame, a rotating disk installed at the bottom of the rotating shaft, a plurality of rotating plates fixedly installed at the edge of the rotating disk, a placing disk installed on the rotating plate, a fixing mechanism for clamping the shock absorber housing is provided on the placing disk, an inflation detection mechanism is also provided on the U-shaped frame, and an intermittent motion mechanism for driving the rotation of the plurality of shock absorber housings is also provided on the detection seat.

[0004] In the related art, when testing the sealing performance of the shock absorber housing, a conical rubber pad is often used to seal the port. The sealing area between the rubber pad and the shock absorber housing is only at the end of the shock absorber. Since the rubber pad needs to withstand a large pressure, it will be damaged and leak after repeated use. Summary of the invention

[0005] The present invention provides a device for detecting the sealing performance of a shock absorber housing of an automobile, aiming to solve the technical problem that in the related art, a conical rubber pad is often used to seal the port when performing the sealing performance detection on the shock absorber housing, and the sealing area between the rubber pad and the shock absorber housing is only at the end of the shock absorber. Since the rubber pad needs to withstand a large pressure, the rubber pad is damaged after repeated use, resulting in air leakage.

[0006] The invention provides a sealing detection device for a car shock absorber housing, comprising: a detection seat for fixing the housing, a sealing mechanism at the open end of the sealing shell and an air pressure detection assembly for detecting the sealing of the housing; the sealing mechanism comprises a bottom plate, a flexible pad, a scroll-shaped support ring, an umbrella-shaped connecting rod assembly and a push plate, the bottom plate is arranged in front of the push plate, the flexible pad is arranged on the front side of the bottom plate, a cylindrical protrusion is provided in the middle of the flexible pad, the protrusion is coaxial with the housing, a receiving groove for accommodating the support ring is provided in the protrusion, the umbrella-shaped connecting rod assembly is mounted on the bottom plate, and the umbrella-shaped connecting rod assembly has a plurality of supporting parts that can contact with the inner ring of the support ring, a driving source for driving the push plate to move in the front-rear direction is mounted on the detection seat, when the bottom plate contacts with the housing, the push plate continues to move toward the bottom plate, the plurality of supporting parts expand outwardly along the radial direction of the housing axis, so that the support ring expands to squeeze the flexible pad onto the inner wall of the housing, and the connecting pipe of the air pressure detection assembly passes through the protrusion and is connected with the inner cavity of the housing.

[0007] The effect is that by arranging the flexible pad and the sealing mechanism, when the shock absorber housing is tested for sealing performance, the flexible pad can be extended into the housing and expanded by the sealing mechanism so that the flexible pad can seal the open end of the housing, thereby solving the problem that the sealing area between the rubber pad and the shock absorber housing is only at the end of the shock absorber, and the rubber pad is easily damaged and leaks due to repeated exposure to high pressure.

[0008] Preferably, a limiting mechanism is provided on the detection seat, the limiting mechanism includes a supporting assembly and a telescopic rod, one end of the telescopic rod is connected to the rear end of the push plate, and the other end is fixedly connected to the detection seat, the driving source controls the extension and retraction of the telescopic rod, the supporting assembly includes a positioning column and a telescopic block, one end of the telescopic block is fixedly connected to the detection seat, and the other end of the telescopic block is extended and retracted forward and backward along the detection seat, the positioning column is vertically arranged at the movable end of the telescopic block, and the shell can be sleeved on the positioning column.

[0009] Preferably, the detection seat is provided with multiple groups of positioning mechanisms, each group of positioning mechanisms includes two positioning plates and two telescopic rods. The two positioning plates are slidably arranged on the detection seat along the left and right directions. A telescopic rod is arranged between each positioning plate and the detection seat. The telescopic rod controls the two positioning plates to move closer or farther away. The effect is that by setting multiple groups of adjustable positioning mechanisms, the height of the shell axis on the detection seat can be adjusted to ensure that shells of different diameters can remain coaxial with the flexible pad, thereby increasing the adaptability of the device.

[0010] Preferably, the umbrella-shaped connecting rod assembly includes multiple support parts and a driving rod, the driving rod is fixedly arranged on the push plate, and a support frame is arranged on the front end of the base plate, the support frame is located in the accommodating groove, and the multiple support parts are evenly distributed at the front end of the support frame around the circumference, and the support part includes a sliding rod and a connecting rod, the driving rod and the support frame are arranged to slide back and forth, and there is a connecting rod between the driving rod and each sliding rod, when the push plate approaches the base plate, the driving rod makes the sliding rod move away from the supporting frame, and the sliding rod drives the support ring to expand and squeeze the flexible pad, the effect of which is: by setting the umbrella-shaped connecting rod mechanism, the support ring can be evenly expanded outward during detection, so as to provide more stable support for the flexible pad.

[0011] Preferably, the raised front end of the flexible pad is a hemispherical bump, the interior of the bump is hollow, and an annular groove connected to the hollow part of the bump is opened on the flexible pad. After the hollow part is squeezed, the gas inside it is filled into the annular groove, thereby increasing the extrusion force between the flexible pad outside the annular groove and the shell. The effect is that by providing a hemispherical bump, and a hollow chamber and annular groove in the bump, when the shell is inflated for inspection, the pressure in the annular groove increases to ensure that when there are uneven bumps on the inner wall of the shell, it can adapt to the shape of the bumps to achieve a stable sealing effect.

[0012] Preferably, the support ring is arranged in the accommodating groove and is constrained by the flexible pad. In the initial state, they are partially overlapped. After the support ring expands, the overlapping part of the support ring is reduced, so that the flexible pad expands evenly, and the outer end of the support ring is a slope.

[0013] Preferably, the positioning post can rotate on its own, and the outer periphery of the positioning post is made of a flexible material, which has the effect that the outer periphery of the positioning post is set to be flexible, which can effectively alleviate the problem of shell deformation caused by the positioning post and the shell being squeezed.

[0014] Preferably, an elastic telescopic member is provided between the bottom plate and the push plate.

[0015] The beneficial effects of the present invention are:

[0016] 1. By providing a flexible pad and a sealing mechanism, when the shock absorber housing is tested for sealing performance, the flexible pad can be extended into the housing and expanded by the sealing mechanism so that the flexible pad can seal the opening end of the housing, thereby solving the problem that the rubber pad has a small force-bearing area and is easily damaged when subjected to large forces.

[0017] 2. By providing a hemispherical protrusion, and providing a hollow chamber and an annular groove in the protrusion, when the shell is inflated for testing, the pressure in the annular groove increases to ensure that it can adapt to the shape of the uneven protrusions on the inner wall of the shell, so as to achieve a stable sealing effect.

[0018] 3. By setting the outer periphery of the positioning column to be flexible, the problem of shell deformation caused by the positioning column and the shell being squeezed can be effectively alleviated. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall device of the detection device.

[0020] Figure 2 It is a schematic diagram of part of the detection device.

[0021] Figure 3 It is a schematic diagram of some parts of the detection device.

[0022] Figure 4 It is a schematic diagram of the overall structure of the sealing mechanism.

[0023] Figure 5 It is a schematic diagram of the overall structure of the umbrella-shaped connecting rod assembly.

[0024] Figure 6 It is a schematic diagram of the parts of the flexible pad.

[0025] Figure 7 It is a schematic diagram of the local structure of the sealing mechanism.

[0026] Reference numerals:

[0027] 11. Detection seat; 13. Shell; 2. Positioning mechanism; 21. Positioning plate; 22. Telescopic rod 2; 3. Limiting mechanism; 31. Support assembly; 311. Positioning column; 312. Telescopic block; 32. Telescopic rod 1; 4. Sealing mechanism; 41. Bottom plate; 411. Support frame; 42. Flexible pad; 421. Receiving groove; 422. Protrusion; 423. Bump; 424. Annular groove; 43. Support ring; 44. Umbrella-shaped connecting rod assembly; 441. Sliding rod; 443. Connecting rod; 444. Driving rod; 45. Push plate. DETAILED DESCRIPTION

[0028] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0029] like Figures 1 to 7As shown, a sealing detection device for a car shock absorber housing 13 of the present invention comprises: a detection seat 11, a positioning mechanism 2, a limiting mechanism 3 and a sealing mechanism 4; a plurality of detection seats 11 are installed on a pedestal at equal intervals along the left-right direction, the limiting mechanism 3 is installed on the detection seat 11 along the front-back direction to limit the movement of the housing 13 in the front-back direction on the detection seat 11, the sealing mechanism 4 is arranged at the open end of the housing 13 to seal the housing 13, a plurality of positioning mechanisms 2 are arranged on the detection seat 11 along the front-back direction to keep the housing 13 and the sealing mechanism 4 coaxial, the housing 13 is placed on the adjusted positioning mechanism 2, the position of the housing 13 is fixed by the limiting mechanism 3, and the housing 13 is sealed by the sealing mechanism 4 arranged at the open end of the housing 13, and the air pressure detection component is opened to perform a sealing detection on the housing 13.

[0030] like Figures 2 to 7 As shown, the limiting mechanism 3 includes a support assembly 31 and a telescopic rod 32. In this embodiment, the telescopic rod 32 is arranged at the front end of the detection seat 11, one end of the telescopic rod 32 is fixedly connected to the detection seat 11, and the other end is telescopically extended forward and backward along the detection seat 11. The driving source controls the telescopic rod 32 to be extended and retracted. The support assembly 31 is arranged at the rear end of the detection seat 11. The support assembly 31 includes a positioning column 311 and a telescopic block 312. One end of the telescopic block 312 is fixedly connected to the detection seat 11, and the other end of the telescopic block 312 is telescopically extended forward and backward along the detection seat 11. The positioning column 311 is vertically arranged The shell 13 is placed on the movable end of the telescopic block 312 and can be sleeved on the positioning column 311. The positioning column 311 is rotatably installed on the movable end of the telescopic block 312. The positioning column 311 can rotate around its own axis. The outer periphery of the positioning column 311 is made of flexible material, preferably rubber material, to prevent the connection part between the positioning column 311 and the shell 13 from being stressed and causing indentations on the shell 13. The rotation setting of the positioning column 311 can adjust different positions of the positioning column 311 to contact with the shell 13, so as to prevent the rubber pad at the same position of the positioning column 311 from being continuously compressed and damaged.

[0031] like Figures 2 to 7 As shown, a plurality of positioning mechanisms 2 are arranged on the detection seat 11 in the front-to-back direction, and each positioning mechanism 2 includes two positioning plates 21 and two telescopic rods 22. The two positioning plates 21 are slidably arranged on the detection seat 11 along the left-right direction, and a telescopic rod 22 is arranged between the positioning plates 21 and the detection seat 11. The telescopic rod 22 controls the two positioning plates 21 to move closer or farther away from each other. The length of the telescopic rod 22 is adjustable, and is preferably an electric telescopic rod. The distance between the two positioning plates 21 is adjusted according to the diameter of the shell 13 to be detected to ensure that shells 13 of different diameters can remain coaxial with the sealing mechanism 4.

[0032] like Figures 3 to 6As shown, the sealing mechanism 4 includes a bottom plate 41, a flexible pad 42, a scroll-shaped support ring 43, an umbrella-shaped connecting rod assembly 44 and a push plate 45. The push plate 45 is fixedly connected to the movable end of the telescopic rod 32. The driving source is installed on the telescopic rod 32 and can drive the telescopic rod 32 to extend and retract. The driving source is preferably a hydraulic telescopic rod. The bottom plate 41 is arranged in front of the push plate 45, and an elastic telescopic member is arranged between the bottom plate 41 and the push plate 45. The elastic telescopic member is preferably a spring. In the initial state, the elastic telescopic member keeps the maximum distance between the bottom plate 41 and the push plate 45. The flexible pad 42 is arranged on the front side of the bottom plate 41. The middle part of the flexible pad 42 is provided with a cylindrical protrusion 422, and the protrusion 422 is kept in contact with the shell 13. The two shells 13 are coaxially supported, and a receiving groove 421 for receiving the support ring 43 is provided in the protrusion 422. The umbrella-shaped connecting rod assembly 44 is installed on the bottom plate 41. The umbrella-shaped connecting rod assembly 44 has multiple supporting parts, and the supporting parts are always in contact with the inner annular surface of the support ring 43. When the umbrella-shaped connecting rod assembly 44 expands, the supporting parts move radially outward along the axis of the shell 13, and the supporting parts expand the support ring 43, squeezing the flexible pad 42 against the inner wall of the shell 13. The connecting pipe of the air pressure detection assembly passes through the protrusion 422 and is connected to the cavity of the shell 13. The air pressure detection assembly can inflate the cavity of the shell 13, maintain the pressure and detect whether the shell 13 is leaking (the air pressure detection assembly is a prior art and is not shown in the drawings, only the connecting pipe is shown).

[0033] like Figures 3 to 7 As shown, the above-mentioned umbrella-shaped connecting rod assembly 44 includes a plurality of supporting parts and a driving rod 444, the driving rod 444 is fixedly arranged on the push plate 45, a supporting frame 411 is arranged on the bottom plate 41, the supporting frame 411 is located in the receiving groove 421, and a plurality of supporting parts are evenly distributed around the circumference at the front end of the supporting frame 411. In this embodiment, four supporting parts are described as an example. By setting a larger number of supporting parts, the supporting effect of the supporting ring 43 can be improved, so as to improve the supporting effect of the supporting ring 43 on the flexible pad 42. In order to ensure uniformity of support, the support part includes a slide bar 441 and a connecting rod 443. The slide bar 441 is slidably arranged around the support frame 411. The slide bar 441 approaches or moves away from the support frame 411. The driving rod 444 is slidably arranged with the support frame 411. There is a connecting rod 443 between the driving rod 444 and each slide bar 441. When the push plate 45 approaches the bottom plate 41, the driving rod 444 makes the slide bar 441 move away from the support frame 411, and the slide bar 441 drives the support ring 43 to expand and squeeze the flexible pad 42.

[0034] like Figures 1 to 7As shown, the front end of the protrusion 422 of the flexible pad 42 is a hemispherical bump 423, the interior of the bump 423 is set to be hollow, and the flexible pad 42 is provided with an annular groove 424 connected to the hollow part of the bump 423. After the chamber of the shell 13 is inflated, the pressure in the shell 13 is greater than the pressure in the bump 423. The bump 423 is squeezed and shrinks, and the pressure in the bump 423 increases, so that the flexible pad 42 on both sides of the annular groove 424 is further squeezed to ensure that when there are uneven bumps on the inner wall of the shell 13, it can adapt to the shape of the bumps to achieve a stable sealing effect.

[0035] The working principle of this embodiment is as follows: when the shell 13 is tested for sealing, the shell 13 is placed on the test seat 11, one end of the shell 13 is sleeved on the positioning column 311, and the distance between the two positioning plates 21 is adjusted to keep the shell 13 coaxial with the protrusion 422. The driving source extends the telescopic rod 32 and drives the push plate 45 to move toward the shell 13. After the part of the flexible pad 42 located on the bottom plate 41 contacts the shell 13, the bottom plate 41 no longer moves forward, and the push plate 45 moves forward further. The driving rod 444 pushes the connecting rod 443 to expand the multiple sliding rods 441 along the radial direction of the axis of the support frame 411. The multiple sliding rods 441 make the support ring 43 expand evenly, and the support ring 43 presses the flexible pad 42 against the inner wall of the shell 13. The driving source stops until the push plate 45 can no longer move forward, and the air pressure detection component is turned on to inflate the shell 13. During the inflation, as the pressure inside the shell 13 increases, the protrusion 423 is squeezed, causing the pressure in the annular groove 424 to increase. The annular groove 424 expands to squeeze the flexible pads 42 on both sides, so that the flexible pads 42 adapt to the unevenness of the inner wall of the shell 13 to ensure that it can adapt to the shape of the unevenness when the inner wall of the shell 13 has unevenness, so as to achieve a stable sealing effect, and further maintain the pressure of the shell 13 to detect whether the amount of gas leakage from the shell 13 within a set time meets the standard. After the detection is completed, the driving source shortens the telescopic rod 32, and the device resets to remove the shell 13 from the detection seat 11 to complete the sealing detection of the shell 13.

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0037] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0038] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A device for detecting the sealing performance of a car shock absorber housing, comprising: A detection seat for fixing the shell, a sealing mechanism for sealing the open end of the shell and an air pressure detection assembly for detecting the sealing performance of the shell; characterized in that the sealing mechanism includes a bottom plate, a flexible pad, a scroll-shaped support ring, an umbrella-shaped connecting rod assembly and a push plate, the bottom plate is arranged in front of the push plate, the flexible pad is arranged on the front side of the bottom plate, a cylindrical protrusion is provided in the middle of the flexible pad, the protrusion is coaxial with the shell, a receiving groove for accommodating the support ring is provided in the protrusion, the umbrella-shaped connecting rod assembly is installed on the bottom plate, and the umbrella-shaped connecting rod assembly has a plurality of supporting parts that can contact the inner ring of the support ring, a driving source for driving the push plate to move in the front and rear directions is installed on the detection seat, when the bottom plate contacts the shell, the push plate continues to move toward the bottom plate, the plurality of supporting parts expand outwardly along the radial direction of the shell axis, so that the support ring expands to squeeze the flexible pad onto the inner wall of the shell, and the connecting pipe of the air pressure detection assembly passes through the protrusion and is connected with the inner cavity of the shell; The detection seat is provided with a limit mechanism, the limit mechanism includes a support assembly, the support assembly includes a positioning column and a telescopic block, one end of the telescopic block is fixedly connected to the detection seat, and the other end of the telescopic block is telescopic forward and backward along the detection seat, the positioning column is vertically arranged at the movable end of the telescopic block, and the shell can be sleeved on the positioning column; The raised front end of the flexible pad is a hemispherical bump, which is hollow inside. The flexible pad is provided with an annular groove connected to the hollow part of the bump. When the hollow part is squeezed, the gas inside it is filled into the annular groove, thereby increasing the squeezing force between the flexible pad outside the annular groove and the shell.

2. The sealing detection device for automobile shock absorber housing according to claim 1, characterized in that: The limiting mechanism also includes a telescopic rod 1, one end of which is connected to the rear end of the push plate, and the other end is fixed to the detection seat, and the driving source controls the telescopic rod 1 to extend and retract.

3. The sealing detection device for automobile shock absorber housing according to claim 2, characterized in that: The detection seat is provided with multiple groups of positioning mechanisms, each group of positioning mechanisms includes two positioning plates and two telescopic rods. The two positioning plates are slidably arranged on the detection seat along the left and right directions. A telescopic rod is arranged between each positioning plate and the detection seat. The telescopic rod controls the two positioning plates to move closer or farther away from each other.

4. The sealing detection device for automobile shock absorber housing according to claim 3, characterized in that: The umbrella-shaped connecting rod assembly includes multiple support parts and a driving rod. The driving rod is fixedly arranged on the push plate. A support frame is arranged at the front end of the base plate. The support frame is located in the accommodating groove. Multiple support parts are evenly distributed at the front end of the support frame around the circumference. The support part includes a sliding rod and a connecting rod. The driving rod and the support frame are arranged to slide back and forth. There is a connecting rod between the driving rod and each sliding rod. When the push plate approaches the base plate, the driving rod makes the sliding rod move away from the support frame, and the sliding rod drives the support ring to expand and extrude the flexible pad.

5. The sealing detection device for automobile shock absorber housing according to claim 4, characterized in that: The support ring is arranged in the accommodating groove and is constrained by the flexible pad. In the initial state, the support ring partially overlaps. After the support ring expands, the overlapping part of the support ring is reduced, so that the flexible pad expands evenly. The outer end of the support ring is an inclined surface.

6. The sealing detection device for automobile shock absorber housing according to claim 2, characterized in that: The positioning column can rotate by itself, and the outer periphery of the positioning column is made of flexible material.

7. The sealing detection device for automobile shock absorber housing according to claim 1, characterized in that: An elastic telescopic member is arranged between the bottom plate and the push plate.

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