Buffer block testing equipment and using method thereof

Abstract

The invention provides buffer block testing equipment. The buffer block testing equipment comprises an equipment base, an equipment main body, an equipment top cover, an air inlet valve, an exhaust valve and a buffer block fixing seat, the equipment body is vertically through and transparent, and the equipment body is detachably connected with the equipment base and the equipment top cover in an airtight mode. The buffer block fixing seat is used for being connected with a buffer block to be tested. Wherein when the buffer block test equipment tests the buffer block to be tested, the connection between the buffer block to be tested and the buffer block fixing seat corresponds to the connection between the buffer block to be tested and the buffer block fixing seat in a working environment. The invention also provides a method for testing the buffer block.

Description

Technical Field

[0001] The invention relates to a buffer block testing device, in particular to a device for testing the positioning stability of a buffer block for an automobile under a specific environmental pressure change. Background Art

[0002] The suspension system is one of the main components of a car. Specifically, the suspension system absorbs and / or filters vibrations through an elastic module (such as a spring or an air spring) disposed inside the suspension system. For the elastic module, prior art technicians usually need to dispose a buffer block inside the elastic module to provide buffering and / or additional damping and / or limiting to prevent the elastic module from being damaged due to excessive compression. However, in the actual operation of the air spring shock absorber, the environmental pressure in which the buffer block is located will change due to the compression and stretching of the elastic module. Changes in environmental pressure can cause the buffer block to deform (such as contraction, expansion or irregular deformation), causing the buffer block to fall off from its fixed seat and the buffer block to fail.

[0003] Therefore, it is necessary to develop a buffer block testing device that can simulate specific environmental pressure changes under working conditions and test the positioning stability of the buffer block. Summary of the invention

[0004] In order to solve the technical problem existing in the prior art that the positioning stability of the buffer block under specific environmental pressure changes cannot be tested, the purpose of the present invention is to provide a new type of buffer block testing equipment that can solve the above problem.

[0005] To this end, the present invention provides a buffer block testing device, which includes:

[0006] Equipment base, equipment body, equipment top cover, air inlet valve, exhaust valve and buffer block fixing seat;

[0007] The device body is through-through and transparent, and the device body is detachably and airtightly connected to the device base and the device top cover, so that the device base, the device body and the device top cover together form a hollow structure;

[0008] The air inlet valve and the air exhaust valve are arranged on the equipment base or the equipment top cover, and are respectively communicated with the hollow structure;

[0009] The buffer block fixing seat is arranged in the hollow structure and is detachably connected to the equipment top cover;

[0010] The buffer block fixing seat is used to connect with the buffer block to be tested, so as to keep the buffer block to be tested in the hollow structure;

[0011] Among them, when the buffer block testing equipment tests the buffer block to be tested, the connection (usually a tight fit connection) between the buffer block to be tested and the buffer block fixing seat corresponds to the connection between the buffer block to be tested and its fixing seat under the working environment.

[0012] It should be understood by those skilled in the art that buffer blocks (especially polyurethane buffer blocks) will deform due to changes in environmental pressure. Specifically, when the environmental pressure increases, the environmental pressure is greater than the pressure of the bubbles inside the buffer block, and the buffer block shrinks. When the environmental pressure decreases, the environmental pressure is less than the pressure of the bubbles inside the buffer block, and the buffer block expands. When the environmental pressure fluctuates continuously, the buffer block deforms irregularly. In the use state (for example, when the buffer block is set in the elastic module of the automobile suspension system), this deformation of the buffer block sometimes causes the buffer block to fall off from its fixed seat, and the buffer block fails. The buffer block testing equipment of the present invention can simulate specific environmental pressure changes under working conditions and test the positioning stability of the buffer block. Through the verification of the buffer block testing equipment of the present invention, technicians can ensure that the deformation of the buffer block caused by changes in environmental pressure is within a controllable range and the positioning of the buffer block is stable.

[0013] The present invention also provides a method for testing a buffer block, which comprises:

[0014] --Provide a buffer block testing device as described above;

[0015] --Remove the top cover of the device to open the buffer block testing device, and then connect the buffer block to be tested with the buffer block fixing seat;

[0016] -- Enclosing the buffer block test device with the device top cover;

[0017] --Connecting the air inlet valve to the air source, opening the air inlet valve and closing the air exhaust valve to enter the charging stage;

[0018] --closing the air inlet valve and entering a pressure holding stage, wherein the pressure holding stage lasts for a predetermined time;

[0019] --Observing the state of the buffer block through the transparent device body during the pressure holding stage;

[0020] --Open the exhaust valve and enter the exhaust stage.

[0021] In the use of the buffer block testing equipment described above, if the buffer block falls off from the buffer block fixing seat during the pressure holding stage, technicians in this field will conclude that the deformation of the buffer block exceeds the threshold, the buffer block positioning is unstable, and it is likely to fall off during use.

[0022] The present invention also provides a use of the aforementioned buffer block testing device, which is used to test the positioning stability of the test buffer block. In a preferred embodiment, the buffer block testing device of the present invention is also provided with a vertical actuator, and the device body is also provided with a vertical telescopic structure, wherein the vertical actuator drives the device body to telescope with the aid of the vertical telescopic structure, thereby changing the volume of the buffer block testing device. The above configuration enables the volume of the buffer block testing device to be periodically changed during the pressure holding stage (the amount of gas inside the device remains unchanged), so that the pressure of the buffer block testing device also changes periodically accordingly. This periodically changing pressure simulates the periodic changes in environmental pressure that the buffer block is subjected to due to the compression and stretching of the elastic module in the working environment, so that the pressure simulated by the buffer block testing device can be closer to the actual situation in the working environment, and the test effect is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The advantages and features of the present invention will now be described in detail with reference to the accompanying drawings, in which the components are not necessarily drawn to scale, wherein:

[0024] Figure 1 An exploded view of an exemplary embodiment of the bump stop testing apparatus of the present invention is shown.

[0025] Figure 2 Shows Figure 1 A front view of a bump stop test apparatus is shown with the bump stop test apparatus sliced ​​along a vertical plane to show its internal details.

[0026] Figure 3 A front view of another exemplary embodiment of the bump stop test apparatus of the present invention is shown, wherein the bump stop test apparatus is sliced ​​along a vertical plane to show its internal details.

[0027] It should be understood that the drawings are drawn for illustration purposes only and are not to be construed as limiting the present invention. DETAILED DESCRIPTION

[0028] In this specification, the terms “vertical, above, and below” refer to Figure 1 The buffer block test equipment is shown divided in the direction.

[0029] In this specification, the "inflation stage" refers to the stage when gas enters the buffer block test device and the pressure of the buffer block test device tends to the gas source pressure. The inflation stage ends when the pressure of the buffer block test device is equal to the gas source pressure. The "pressure holding stage" refers to the stage when no gas enters or is discharged from the buffer block test device, that is, the stage when the amount of gas inside the device remains unchanged. The pressure holding stage lasts for a predetermined time. The "exhaust stage" refers to the stage when gas is discharged from the buffer block test device and the pressure of the buffer block test device tends to atmospheric pressure. The exhaust stage ends when the pressure of the buffer block test device is equal to atmospheric pressure.

[0030] The present invention provides a buffer block testing device, which comprises:

[0031] Equipment base, equipment body, equipment top cover, air inlet valve, exhaust valve and buffer block fixing seat;

[0032] The device body is through-through and transparent, and the device body is detachably and airtightly connected to the device base and the device top cover, so that the device base, the device body and the device top cover together form a hollow structure;

[0033] The air inlet valve and the air exhaust valve are arranged on the equipment base or the equipment top cover, and are respectively communicated with the hollow structure;

[0034] The buffer block fixing seat is arranged in the hollow structure and is detachably connected to the equipment top cover;

[0035] The buffer block fixing seat is used to connect with the buffer block to be tested, so as to keep the buffer block to be tested in the hollow structure;

[0036] Among them, when the buffer block testing equipment tests the buffer block to be tested, the connection (usually a tight fit connection) between the buffer block to be tested and the buffer block fixing seat corresponds to the connection between the buffer block to be tested and its fixing seat under the working environment.

[0037] In a preferred embodiment of the present invention, the buffer block fixing seat is a plurality of buffer block fixing seats, wherein each of the buffer block fixing seats corresponds to a variety of the buffer block to be tested. In this way, a person skilled in the art can select a buffer block fixing seat to be connected to the device top cover according to the type of the buffer block to be tested before performing the test. The configuration of multiple buffer block fixing seats expands the application scope of the buffer block testing device of the present invention, making it suitable for testing various types of buffer blocks. The buffer block fixing seat includes, for example, a fixing portion and a connecting portion, wherein the fixing portion realizes the detachable connection with the device top cover as described above by, for example, a screw, and the connecting portion is used to connect with the buffer block to be tested. Among them, the form and characteristics of the connection between the connecting portion and the buffer block to be tested (such as the degree of tightness) are the same as the form and characteristics of the connection between the buffer block to be tested and its fixing seat in the working environment, and such connection can be, for example, a tight fit connection or a snap-on connection. In some embodiments, the buffer block fixing seat is in the form of a stepped shaft, and a screw hole for accommodating a screw is provided along the axis. The lower section of the stepped shaft serves as a connecting portion, and can form a tight fit connection with a hole for fixing in, for example, a bowl-shaped buffer block, thereby simulating the fixing of the bowl-shaped buffer block in actual use.

[0038] In a preferred embodiment of the present invention, the air inlet valve and the air exhaust valve are arranged on the equipment base, so that the technicians can disassemble the equipment top cover without affecting the air path, which facilitates the replacement of the buffer block.

[0039] In a preferred embodiment of the present invention, the buffer block testing device further comprises a pressure gauge and a boost pump, the pressure gauge and the boost pump are connected to the intake valve in sequence, wherein the pressure gauge is used to detect the intake pressure, and the boost pump is used to boost the intake pressure. More preferably, the boost range of the boost pump is between 0 MPa and 2 MPa.

[0040] In a preferred embodiment of the present invention, the device body is in the form of a cylindrical barrel, wherein the outer diameter of the cylindrical barrel may be, for example, in the range of 50 mm to 300 mm, and the height of the cylindrical barrel may be, for example, in the range of 50 mm to 300 mm.

[0041] In a preferred embodiment of the present invention, the buffer block testing device further comprises a movable workbench, and the hollow structure is arranged on the movable workbench. In this way, the buffer block testing device can be freely moved as required.

[0042] In a preferred embodiment of the present invention, the buffer block test device further comprises a safety shield with at least one door, and the hollow structure is arranged in the safety shield. The safety shield has certain explosion-proof performance, thereby ensuring the safety of the test.

[0043] In a preferred embodiment of the present invention, the buffer block test device is further provided with a vertical actuator, and the device body is further provided with a vertical telescopic structure, wherein the vertical actuator drives the device body to telescope with the aid of the vertical telescopic structure, thereby changing the volume of the buffer block test device. Preferably, the vertical telescopic structure is a multi-layer nested structure of the device body. More preferably, the vertical actuator is an electric cylinder that moves in the vertical direction, and the output end of the electric cylinder is connected to the device top cover.

[0044] The present invention also provides a method for testing a buffer block, which comprises:

[0045] --Provide a buffer block testing device as described above;

[0046] --Remove the top cover of the device to open the buffer block testing device, and then connect the buffer block to be tested with the buffer block fixing seat;

[0047] -- Enclosing the buffer block test device with the device top cover;

[0048] --Connecting the air inlet valve to the air source, opening the air inlet valve and closing the air exhaust valve to enter the charging stage;

[0049] --closing the air inlet valve and entering a pressure holding stage, wherein the pressure holding stage lasts for a predetermined time;

[0050] --Observing the state of the buffer block through the transparent device body during the pressure holding stage;

[0051] --Open the exhaust valve and enter the exhaust stage.

[0052] In the use of the buffer block testing equipment described above, if the buffer block falls off from the buffer block fixing seat during the pressure holding stage, technicians in this field can conclude that the deformation of the buffer block exceeds the threshold, the buffer block positioning is unstable, and it is possible to fall off during use.

[0053] The present invention also provides another method for testing a buffer block, which comprises:

[0054] - providing a buffer block testing device with a vertical actuator as described above;

[0055] --Remove the top cover of the device to open the buffer block testing device, and then connect the buffer block to be tested with the buffer block fixing seat;

[0056] -- Enclosing the buffer block test device with the device top cover;

[0057] --Connecting the air inlet valve to the air source, opening the air inlet valve and closing the air exhaust valve to enter the charging stage;

[0058] --closing the air inlet valve and entering the pressure holding stage, and opening the vertical actuator during the pressure holding stage so that the volume of the buffer block test device changes periodically, and ensuring that the pressure holding stage lasts for a predetermined time;

[0059] --Observing the state of the buffer block through the transparent device body during the pressure holding stage;

[0060] --Open the exhaust valve and enter the exhaust stage.

[0061] Similarly, in the use of the buffer block testing equipment described above, if the buffer block falls off from the buffer block fixing seat during the pressure holding stage, a person skilled in the art can conclude that the deformation of the buffer block exceeds the threshold value, and the positioning of the buffer block is unstable, and it is possible for the buffer block to fall off during use. In addition, the above-mentioned use of the buffer block testing equipment with a vertical actuator makes it possible to periodically change the volume of the buffer block testing equipment during the pressure holding stage (the amount of gas inside the equipment remains unchanged), so that the pressure of the buffer block testing equipment also changes periodically accordingly. This periodically changing pressure simulates the periodic changes in environmental pressure that the buffer block is subjected to due to the compression and stretching of the elastic module in the working environment, so that the pressure simulated by the buffer block testing equipment can be closer to the actual situation in the working environment, and the test effect is better.

[0062] The various components of the buffer block testing device of the present invention (except the device body) can be made of materials such as plastic and metal, and prepared by commonly used processing and forming methods. Specifically, the plastic material can be ABS, nylon, polyurethane, etc., and the metal material can be stainless steel, aluminum, copper, etc. If a plastic material is used, the commonly used processing and forming methods are injection molding, molding, extrusion molding, etc. If a metal material is used, the commonly used processing and forming methods are machining, casting, stamping, bending, etc. The device body of the buffer block testing device of the present invention can be made of materials such as glass, polyacrylic resin or polycarbonate, and is preferably processed and formed by methods such as extrusion molding.

[0063] In the most basic case, the buffer block test device of the present invention has a substantially stable pressure during the pressure holding stage. Furthermore, the buffer block test device can also be equipped with a vertical actuator and a vertical telescopic structure. In this way, the pressure can be changed periodically during the pressure holding stage, making the test closer to the actual situation in the working environment and achieving better test results.

[0064] Specific embodiments of the present invention are described below in conjunction with the accompanying drawings; however, the present invention is not limited to these specific embodiments.

[0065] Figure 1 An exploded view of an exemplary embodiment of the bump stop test apparatus of the present invention is shown. Figure 1 As shown, the buffer block test device includes: a device base 101, a device body 102, a device top cover 103, an air inlet valve 104, an exhaust valve 105 and a buffer block fixing seat 106. In addition, Figure 1 Also shown is a buffer block 200. The device body 102 is in the form of a transparent cylinder, so that a technician can observe the internal conditions of the buffer block test device from the outside.

[0066] Figure 2 Shows Figure 1 A front view of the buffer block test device is shown, wherein the buffer block test device is sliced ​​along a vertical plane to show its internal details. Figure 2 As shown, the device body 102 is arranged on the device base 101 and is detachably connected to the device base 101 in an airtight manner, and the device top cover 103 is arranged on the device body 102 and is detachably connected to the device body 102 in an airtight manner. The device base 101, the device body 102 and the device top cover 103 together constitute a hollow structure. The air inlet valve 104 and the exhaust valve 105 are arranged on the device base 101 and are connected to the hollow structure through the channel inside the device base 101. The buffer block fixing seat 106 is arranged below the device top cover 103 and is screwed to the device top cover 103 (the screws are not shown). The buffer block 200 is tightly fitted with the buffer block fixing seat 106 to keep the buffer block 200 in the hollow structure. Among them, the tight fit connection between the buffer block 200 and the buffer block fixing seat 106 corresponds to the connection between the buffer block 200 and its fixing seat in the working environment.

[0067] Figure 3 A front view of another exemplary embodiment of the bump stop test apparatus of the present invention is shown, wherein the bump stop test apparatus is sliced ​​along a vertical plane to show its internal details. Figure 3 The buffer block test equipment shown is Figure 2 The main difference of the buffer block test device shown is that the device body 102' is in the form of a multi-layer nested transparent cylinder, including an upper body 102'A and a lower body 102'B. The multi-layer nested structure acts as a vertical telescopic structure, so that the device body 102' can be telescoped in the vertical direction. In addition, as shown in FIG. Figure 3 As shown, the buffer block test device also has an electric cylinder 107 (as shown by the arrow in the figure) that can move in the vertical direction, and the output end of the electric cylinder 107 is connected to the device top cover 103. The above arrangement enables the electric cylinder 107 to drive the device body 102' to expand and contract by means of the multi-layer nested structure, thereby changing the volume of the buffer block test device.

[0068] It should be understood by those skilled in the art that although Figures 1 to 3 The technical solution shown includes a buffer block, but the buffer block itself is not a necessary component of the buffer block testing device of the present invention. It should also be understood by those skilled in the art that in actual use, components such as the pressure gauge, booster pump, movable workbench, safety shield, etc. as described above can be added according to specific needs. All of the above are within the scope of protection of the present invention.

Claims

1. A buffer block testing device, characterized in that: include: Equipment base, equipment body, equipment top cover, air inlet valve, exhaust valve and buffer block fixing seat; The device body is through-through and transparent, and the device body is detachably and airtightly connected to the device base and the device top cover, so that the device base, the device body and the device top cover together form a hollow structure; The air inlet valve and the air exhaust valve are arranged on the equipment base or the equipment top cover, and are respectively communicated with the hollow structure; The buffer block fixing seat is arranged in the hollow structure and is detachably connected to the equipment top cover; The buffer block fixing seat is used to connect with the buffer block to be tested, so as to keep the buffer block to be tested in the hollow structure; When the buffer block testing device tests the buffer block to be tested, the connection between the buffer block to be tested and the buffer block fixing seat corresponds to the connection between the buffer block to be tested and its fixing seat in a working environment.

2. The buffer block testing device according to claim 1, characterized in that: The buffer block fixing seat is a plurality of buffer block fixing seats, wherein each of the buffer block fixing seats corresponds to a type of the buffer block to be tested.

3. The buffer block testing device according to claim 1 or 2, characterized in that: The air inlet valve and the air exhaust valve are arranged on the equipment base.

4. The buffer block testing device according to claim 1 or 2, characterized in that: The buffer block testing equipment also includes a pressure gauge and a boost pump, which are connected to the intake valve in sequence, wherein the pressure gauge is used to detect the intake pressure, and the boost pump is used to boost the intake air.

5. The buffer block testing device according to claim 1 or 2, characterized in that: The device body is in the form of a cylindrical barrel, wherein the outer diameter of the cylindrical barrel is in the range of 50 mm to 300 mm, and the height of the cylindrical barrel is in the range of 50 mm to 300 mm.

6. The buffer block testing device according to claim 1 or 2, characterized in that: The buffer block testing device is also provided with a vertical actuator, and the device body is also provided with a vertical telescopic structure, wherein the vertical actuator drives the device body to telescope with the help of the vertical telescopic structure, thereby changing the volume of the buffer block testing device.

7. The buffer block testing device according to claim 6, characterized in that: The vertical telescopic structure is a multi-layer nested structure of the device body.

8. The buffer block testing device according to claim 6, characterized in that: The vertical actuator is an electric cylinder that moves in the vertical direction, and the output end of the electric cylinder is connected to the top cover of the equipment.

9. A method for testing a buffer block, characterized in that: include: --Provide a buffer block testing device as claimed in any one of claims 1 to 5; --Remove the top cover of the device to open the buffer block testing device, and then connect the buffer block to be tested with the buffer block fixing seat; -- Enclosing the buffer block test device with the device top cover; --Connecting the air inlet valve to the air source, opening the air inlet valve and closing the air exhaust valve to enter the charging stage; --closing the air inlet valve and entering a pressure holding stage, wherein the pressure holding stage lasts for a predetermined time; --Observing the state of the buffer block through the transparent device body during the pressure holding stage; --Open the exhaust valve and enter the exhaust stage.

10. A method for testing a buffer block, characterized in that: include: --Providing a buffer block testing device as claimed in any one of claims 6 to 8; --Remove the top cover of the device to open the buffer block testing device, and then connect the buffer block to be tested with the buffer block fixing seat; -- Enclosing the buffer block test device with the device top cover; --Connecting the air inlet valve to the air source, opening the air inlet valve and closing the air exhaust valve to enter the charging stage; --closing the air inlet valve and entering the pressure holding stage, and opening the vertical actuator during the pressure holding stage so that the volume of the buffer block test device changes periodically, and ensuring that the pressure holding stage lasts for a predetermined time; --Observing the state of the buffer block through the transparent device body during the pressure holding stage; --Open the exhaust valve and enter the exhaust stage.

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