A test device for a delivery valve bellows

Abstract

The present application relates to the technical field of vacuum equipment, and discloses a testing device for conveying valve bellows, which comprises a rack, a base and a mounting seat, the upper end of the mounting seat is provided with a first telescopic cylinder, the telescopic end of the first telescopic cylinder is connected with a first connecting block, and the first connecting block is in sliding fit with the mounting seat; the upper end surface of the base is provided with a second telescopic cylinder, the telescopic end of the second telescopic cylinder is connected with a second connecting block through a connecting piece, and the second connecting block is in sliding fit with the base; the first connecting block is used for connecting the upper end of the bellows, the second connecting block is used for connecting the lower end of the bellows, and the sliding direction of the first connecting block is perpendicular to the sliding direction of the second connecting block. One telescopic cylinder is used for vertically pressing down the bellows, simulating the force condition in the vertical direction when the bellows works, and the second telescopic cylinder provides a transverse thrust for the bellows, so as to simulate the situation that the bellows is horizontally deviated after being compressed to a certain degree when working.

Description

Technical Field

[0001] This invention relates to the field of vacuum equipment technology, and in particular to a testing device for a transfer valve bellows. Background Technology

[0002] With the increasing urgency of domestic production of semiconductor equipment, the localization of vacuum transfer valves as core components is also urgently needed. Transfer valves used in semiconductor equipment have very high requirements, such as cleanliness, low vibration, and long lifespan. Among these, long lifespan is the most critical requirement for transfer valves, particularly the bellows. During transfer valve testing, when leakage occurs, it is often impossible to determine whether the cause is the bellows or other components. Therefore, a separate testing device for bellows is urgently needed. However, the movement process of the bellows in a vacuum transfer valve differs from that of a regular bellows, which only undergoes vertical compression. After being compressed to a certain extent, the bellows also undergoes lateral displacement. However, existing technologies, such as the bellows life tester disclosed in application number CN202010498261.6 and the high-precision bellows-specific fatigue testing device disclosed in application number CN202323323894.1, only perform vertical compression tests, lacking lateral testing, which cannot meet the needs of the vacuum transfer valve field. Summary of the Invention

[0003] To solve the above problems, the technical solution adopted by the present invention is as follows:

[0004] A testing device for a transmission valve bellows includes a frame, a base, and a mounting base. The base is fixedly mounted on the upper surface of the frame, and the mounting base is vertically mounted on the upper surface of the base. The mounting base is characterized in that: a first telescopic cylinder is provided at the upper end of the mounting base, and a first connecting block is connected to the telescopic end of the first telescopic cylinder. The first connecting block is slidably adapted to the mounting base.

[0005] The upper surface of the base is provided with a second telescopic cylinder, and the telescopic end of the second telescopic cylinder is connected to a second connecting block through a connector. The second connecting block is slidably adapted to the base.

[0006] The first connecting block is used to connect the upper end of the bellows, and the second connecting block is used to connect the lower end of the bellows. The sliding direction of the first connecting block is perpendicular to the sliding direction of the second connecting block.

[0007] Furthermore, the first telescopic cylinder is connected to a first electromagnetic reversing valve via a speed regulating connector and an air pipe, and the second telescopic cylinder is connected to a second electromagnetic reversing valve via a speed regulating connector and an air pipe.

[0008] Furthermore, both the first telescopic cylinder and the second telescopic cylinder are equipped with two position switches, which are used to detect whether the first telescopic cylinder and the second telescopic cylinder are closed or open.

[0009] Furthermore, when the second telescopic cylinder is closed to the position, the line connecting the midpoint of the first connecting block and the midpoint of the second connecting block is parallel to the telescopic direction of the telescopic end of the first telescopic cylinder.

[0010] Furthermore, the position switch, the first solenoid directional valve, and the second solenoid directional valve are all connected to the controller.

[0011] Furthermore, the positioning switch is a reed switch, and both the first telescopic cylinder and the second telescopic cylinder are equipped with permanent magnet rings adapted to the positioning switch.

[0012] A test method for a test device for a bellows of a transmission valve includes the following steps: Both the first and second telescopic cylinders detect that their respective position switches are closed. The upper end of the bellows is connected to a first connecting block, and the lower end is connected to a second connecting block. The first telescopic cylinder is activated, causing its telescopic end to extend downwards and push the first connecting block downwards, compressing the bellows. When the downward movement of the telescopic end of the first telescopic cylinder triggers the position switch, it indicates that the first telescopic cylinder is fully open and stops operating. Simultaneously, the second telescopic cylinder is activated, its telescopic end extending outwards and pushing the second connecting block laterally via a connecting member. The process begins with the second telescopic cylinder moving inwards. When the telescopic end of the second telescopic cylinder reaches the trigger position switch, it indicates that the second telescopic cylinder is fully open. The second solenoid directional valve is activated and switches the air path, causing the telescopic end of the second telescopic cylinder to retract inwards. This retraction is then pulled laterally by the connecting piece. When the telescopic end of the second telescopic cylinder reaches the trigger position switch, it indicates that the second telescopic cylinder is fully closed and stops working. Simultaneously, the first solenoid directional valve is activated and switches the air path, activating the first telescopic cylinder. The telescopic end of the first telescopic cylinder moves upwards and retracts. When the telescopic end of the first telescopic cylinder reaches the trigger position switch, it indicates that the first telescopic cylinder is fully closed and stops working, completing one test of the bellows.

[0013] The beneficial effects of this invention are:

[0014] The first telescopic cylinder is used to vertically press down the bellows to simulate the vertical force on the bellows when it is working. The second telescopic cylinder provides lateral thrust to the bellows to simulate the lateral displacement that occurs after the bellows is compressed to a certain extent when it is working.

[0015] By adjusting the positions of the two position switches on the first and second telescopic cylinders, the overall telescopic length of the telescopic ends of the first and second telescopic cylinders can be adjusted. This, in turn, adjusts the compressed length of the bellows and the lateral pushing distance, thus meeting different working conditions of the bellows. Furthermore, it can be adapted to bellows of different lengths to meet the needs of different models of vacuum transfer valves, offering wide applicability. Attached Figure Description

[0016] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of the invention.

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the present invention;

[0019] Figure 2 This is a rear view of the present invention;

[0020] Figure 3 This is a schematic diagram of the structure of the first telescopic cylinder;

[0021] Figure 4 This is a schematic diagram of the second telescopic cylinder;

[0022] Figure 5 This is a partial sectional view of the first telescopic cylinder;

[0023] Figure 6 This is a cross-sectional view of the bellows connection.

[0024] In the diagram: 1. Stand; 2. Base; 3. Mounting seat; 4. First telescopic cylinder; 5. First connecting block; 6. Second telescopic cylinder; 7. Connector; 8. Second connecting block; 9. Speed ​​control connector; 10. Air pipe; 11. First solenoid directional valve; 12. Position switch; 13. Bellows; 14. Second solenoid directional valve; 15. Guide rail; 16. Guide rail slider; 17. First connecting ring; 18. Second connecting ring; 19. Screw; 20. Sealing ring; 21. Normally open air port; 22. Normally closed air port. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0026] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms "first," "second," and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships, and these relative positional relationships may change accordingly when the absolute position of the described object changes.

[0027] like Figures 1-6 As shown, a testing device for a transmission valve bellows includes a stand 1, a base 2 and a mounting base 3. The base 2 is fixedly installed on the upper surface of the stand 1, and the mounting base 3 is vertically installed on the upper surface of the base 2.

[0028] like Figure 1 and Figure 2 As shown, the platform 1 is welded from several rectangular steel pipes, and the base 2 is a rectangular steel plate. The four corners of the base 2 are fixed to the platform 1 by screws. The platform 1 has a certain height to facilitate the operation of the operator on the base 2.

[0029] Mounting base 3 is a U-shaped plate, which is upside down and installed on the upper surface of base 2. It can be fixed using existing methods such as welding or screws. A first telescopic cylinder 4 is located at the upper end of mounting base 3. The first telescopic cylinder 4 is used to vertically press down the bellows 13, simulating the vertical force on the bellows 13 during operation. The telescopic end of the first telescopic cylinder 4 passes through the upper surface of mounting base 3 and is connected to a first connecting block 5, which is used to connect the upper end of the bellows 13.

[0030] The upper surface of the base 2 is provided with a second telescopic cylinder 6. The telescopic end of the second telescopic cylinder 6 is connected to a second connecting block 8 through a connector 7. The second connecting block 8 is used to connect the lower end of the bellows 13. The sliding direction of the first connecting block 5 is perpendicular to the sliding direction of the second connecting block 8. The second telescopic cylinder 6 provides lateral thrust to the bellows 13 to simulate the situation where the bellows 13 is compressed to a certain extent and then shifts laterally when it is working.

[0031] To ensure the stability of the bellows 13 when the first telescopic cylinder 4 and the second telescopic cylinder 6 push it, the first connecting block 5 is slidably adapted to the mounting base 3, and the second connecting block 8 is slidably adapted to the base 2. Specifically, the inner walls of both sides of the mounting base 3 are provided with guide rails 15, which are vertically installed. The first connecting block 5 has guide rail sliders 16 adapted to the guide rails 15 on both sides. During the process of the first telescopic cylinder 4 pushing the first connecting block 5 to press down the bellows 13, the cooperation of the vertical guide rails 15 and the guide rail sliders 16 can prevent the bellows 13 from being laterally offset before reaching the specified compression degree, thus affecting the test results. The upper surface of the base 2 is provided with a guide rail 15, which is horizontally installed and parallel to the telescopic direction of the second telescopic cylinder 6. The lower surface of the second connecting block 8 is provided with guide rail sliders 16 adapted to the guide rail 15.

[0032] The first telescopic cylinder 4 is connected to a first electromagnetic reversing valve 11 via a speed-regulating connector 9 and an air pipe 10, and the second telescopic cylinder 6 is connected to a second electromagnetic reversing valve 14 via the same connector. The speed-regulating connector 9 controls the gas flow rate into the first telescopic cylinder 4 and the second telescopic cylinder 6, thereby controlling the movement speed of their telescopic ends. The first electromagnetic reversing valve 11 and the second electromagnetic reversing valve 14 are used to provide power to the first telescopic cylinder 4 and the second telescopic cylinder 6 via an external air source, and also control the direction of gas flow, thereby controlling the extension and retraction of the telescopic ends of the first telescopic cylinder 4 and the second telescopic cylinder 6.

[0033] Both the first telescopic cylinder 4 and the second telescopic cylinder 6 are equipped with two position switches 12. The position switches 12 are used to detect whether the first telescopic cylinder 4 and the second telescopic cylinder 6 are fully closed or fully open. Specifically, as shown... Figure 5As shown, both the first telescopic cylinder 4 and the second telescopic cylinder 6 include a cylinder barrel and a piston rod. One end of the piston rod slides into the cylinder barrel as the piston end, and the other end extends out of the cylinder barrel as the telescopic end. Air holes are provided at both the upper and lower ends of the cylinder barrel. These air holes are connected to either the first electromagnetic reversing valve 11 or the second electromagnetic reversing valve 14 via an air pipe 10 and a speed control connector 9. When the piston end slides back and forth, it is positioned between the two air holes. The position switch 12 is located on the outer wall of the cylinder barrel, and the two position switches 12 are respectively located near the air holes. The position switch 12 uses a reed switch. A permanent magnet ring is fitted on the piston end. When the piston end slides back and forth and approaches the position switch 12, the magnetic field causes the two magnetized reeds inside the position switch 12 to attract each other and close, thus completing the circuit. When the permanent magnet ring moves away, the reeds spring open, and the circuit is broken.

[0034] The position switch 12, the first solenoid directional valve 11, and the second solenoid directional valve 14 are all connected to the controller. The controller can be a PLC or a microcontroller or other controller that can easily control the requirements. The controller determines the working status of the first telescopic cylinder 4 and the second telescopic cylinder 6 by receiving whether the circuit of the position switch 12 is conducting.

[0035] When the position switch 12 on the first telescopic cylinder 4 and the second telescopic cylinder 6, located away from the telescopic end, is in the on state and the position switch 12 on the other side of the telescopic end, it indicates that the first telescopic cylinder 4 and the second telescopic cylinder 6 are in the closed position. When the position switch 12 on the first telescopic cylinder 4 and the second telescopic cylinder 6, located away from the telescopic end, is in the off state and the position switch 12 on the other side of the telescopic end, it indicates that the first telescopic cylinder 4 and the second telescopic cylinder 6 are in the open position. When the position switch 12 on the first telescopic cylinder 4 and the second telescopic cylinder 6, located away from the telescopic end, is in the off state and the position switch 12 on the other side of the telescopic end, it indicates that the first telescopic cylinder 4 and the second telescopic cylinder 6 are still in the telescopic end moving state, specifically whether they are in the extended or retracted state, which is determined by the state of the previous position switch 12.

[0036] By adjusting the positions of the two position switches 12 on the first telescopic cylinder 4 and the second telescopic cylinder 6, the overall telescopic length of the telescopic ends of the first telescopic cylinder 4 and the second telescopic cylinder 6 can be adjusted, thereby adjusting the compressed length of the bellows 13 and the lateral pushing distance to meet different working states of the bellows 13. Furthermore, it can be adapted to bellows 13 of different lengths to meet the needs of different models of vacuum transmission valves, demonstrating wide applicability.

[0037] When the second telescopic cylinder 6 is closed, the line connecting the midpoint of the first connecting block 5 and the midpoint of the second connecting block 8 is parallel to the telescopic direction of the telescopic end of the first telescopic cylinder 4. This ensures that the bellows 13 is subjected to vertical pressure.

[0038] like Figure 6 As shown, both the first connecting block 5 and the second connecting block 8 have grooves at their centers that match the diameter of the bellows 13. The upper end of the bellows 13 has a first connecting ring 17, and the lower end has a second connecting ring 18. The first connecting ring 17 is fixed to the first connecting block 5 by screws 19. A sealing ring 20 is fitted onto the outer wall of the second connecting ring 18. The sealing ring 20 is interference-fitted with the groove on the second connecting block 8 to fix the lower end of the bellows 13. Fixing the upper and lower ends of the bellows 13 to the first connecting block 5 and the second connecting block 8 respectively simulates its fixed connection to the transmission valve during operation, preventing the bellows 13 from rotating during testing and ensuring more accurate test results.

[0039] The testing method of this invention is as follows:

[0040] When both the position switches 12 on the first telescopic cylinder 4 and the second telescopic cylinder 6 detect that the first telescopic cylinder 4 and the second telescopic cylinder 6 are closed, the upper end of the bellows 13 is connected to the first connecting block 5, and the lower end of the bellows 13 is connected to the second connecting block 8. The first telescopic cylinder 4 is activated, and its telescopic end moves downward, pushing the first connecting block 5 downward to compress the bellows 13. When the telescopic end of the first telescopic cylinder 4 moves downward and triggers the position switch 12, it indicates that the first telescopic cylinder 4 is open and stops working. At the same time, the second telescopic cylinder 6 is activated, and its telescopic end moves outward, pushing the second connecting block 8 laterally through the connecting piece 7. When the telescopic end of the second telescopic cylinder 6 moves to the trigger position switch 12, it indicates that the second telescopic cylinder 6 is in the open position. The second solenoid directional valve 14 is activated and switches the air path. The telescopic end of the second telescopic cylinder 6 moves inward to retract and pulls the second connecting block 8 laterally through the connecting piece 7. When the telescopic end of the second telescopic cylinder 6 moves to the trigger position switch 12, it indicates that the second telescopic cylinder 6 is in the closed position and stops working. At the same time, the first solenoid directional valve 11 is activated and switches the air path. The first telescopic cylinder 4 is activated and the telescopic end of the first telescopic cylinder 4 moves upward to retract. When the telescopic end of the first telescopic cylinder 4 moves to the trigger position switch 12, it indicates that the first telescopic cylinder 4 is in the closed position and stops working, completing one test of the bellows 13.

[0041] In this invention, once a test is completed, the bellows 13 can be tested and removed. Alternatively, the bellows 13 can be tested multiple times to more realistically simulate its working state in the transmission valve, making the test results more accurate.

[0042] In this invention, both the first electromagnetic reversing valve 11 and the second electromagnetic reversing valve 14 are provided with three air ports. One air port is connected to an air source to supply driving gas to the first telescopic cylinder 4 and the second telescopic cylinder 6, and this air port of the first electromagnetic reversing valve 11 and the second electromagnetic reversing valve 14 is simultaneously connected to the same air source. One air port is a normally open air port 21. When the normally open air port 21 is opened, the telescopic ends of the first telescopic cylinder 4 and the second telescopic cylinder 6 extend. The other air port is a normally closed air port 22. When the normally closed air port 22 is opened, the telescopic ends of the first telescopic cylinder 4 and the second telescopic cylinder 6 retract. The opening or closing of the normally open air port 21 and the normally closed air port 22 of the first electromagnetic reversing valve 11 and the second electromagnetic reversing valve 14 is controlled by a controller. Specifically, the controller controls the circuit state of the position switch 12 and the changes in its state.

[0043] At the start of the test, the controller receives information from position switch 12. The circuit of position switch 12 on the first telescopic cylinder 4, which is away from the telescopic end, is turned on, while the circuit of position switch 12 near the telescopic end is turned off. The circuit of position switch 12 on the second telescopic cylinder 6, which is away from the telescopic end, is turned on, while the circuit of position switch 12 near the telescopic end is turned off. Based on the received signal from position switch 12, the controller controls the normally open port 21 of the first solenoid directional valve 11 to open and close, and the normally open port 21 and normally closed port 22 of the second solenoid directional valve 14 to close. The telescopic end of the first telescopic cylinder 4 then extends.

[0044] When the first telescopic cylinder 4 extends, the controller receives information from the position switch 12. The circuit of the position switch 12 on the first telescopic cylinder 4 that is far from the telescopic end is disconnected, and the circuit of the position switch 12 that is close to the telescopic end is disconnected. The circuit of the position switch 12 on the second telescopic cylinder 6 that is far from the telescopic end is turned on, and the circuit of the position switch 12 that is close to the telescopic end is disconnected. The controller does not change the air port of the first solenoid directional valve 11 and the second solenoid directional valve 14.

[0045] After the first telescopic cylinder 4 extends to its open position, the controller receives information from the position switch 12. The circuit of the position switch 12 on the first telescopic cylinder 4, which is away from the telescopic end, is disconnected and remains unchanged. The circuit of the position switch 12 near the telescopic end is turned on and changes its state. The circuit of the position switch 12 on the second telescopic cylinder 6, which is away from the telescopic end, is turned on and remains unchanged. The circuit of the position switch 12 near the telescopic end is disconnected and remains unchanged. Based on the circuit of the position switch 12 and the circuit change, the controller controls the normally open port 21 and normally closed port 22 of the first electromagnetic reversing valve 11 to close. The first telescopic cylinder 4 remains in its original state. The controller controls the normally open port 21 of the second electromagnetic reversing valve 14 to open and the normally closed port 22 to close. The telescopic end of the second telescopic cylinder 6 extends.

[0046] When the second telescopic cylinder 6 extends, the controller receives information from the position switch 12. The circuit of the position switch 12 on the first telescopic cylinder 4 that is far from the telescopic end is disconnected and its state remains unchanged. The circuit of the position switch 12 that is close to the telescopic end is turned on and its state remains unchanged. The circuit of the position switch 12 on the second telescopic cylinder 6 that is far from the telescopic end is disconnected and its state changes. The circuit of the position switch 12 that is close to the telescopic end is disconnected and its state remains unchanged. The controller does not change the air ports of the first solenoid directional valve 11 and the second solenoid directional valve 14.

[0047] After the second telescopic cylinder 6 extends and opens to its final position, the controller receives information from the position switch 12. The circuit of the position switch 12 on the first telescopic cylinder 4, which is away from the telescopic end, is disconnected and remains unchanged. The circuit of the position switch 12 near the telescopic end is connected and remains unchanged. The circuit of the position switch 12 on the second telescopic cylinder 6, which is away from the telescopic end, is disconnected and remains unchanged. The circuit of the position switch 12 near the telescopic end is connected and changes its state. Based on the circuit of the position switch 12 and the circuit change, the controller controls the normally open port 21 and normally closed port 22 of the first electromagnetic reversing valve 11 to close. The first telescopic cylinder 4 remains stationary. The controller controls the normally open port 21 of the second electromagnetic reversing valve 14 to close and the normally closed port 22 to open. The telescopic end of the second telescopic cylinder 6 retracts.

[0048] When the second telescopic cylinder 6 retracts, the controller receives information from the position switch 12. The circuit of the position switch 12 on the first telescopic cylinder 4 that is far from the telescopic end is disconnected and its state remains unchanged. The circuit of the position switch 12 that is close to the telescopic end is turned on and its state remains unchanged. The circuit of the position switch 12 on the second telescopic cylinder 6 that is far from the telescopic end is disconnected and its state remains unchanged. The circuit of the position switch 12 that is close to the telescopic end is disconnected and its state changes. Based on the circuit of the position switch 12 and the circuit change, the controller does not change the air port of the first solenoid directional valve 11 and the second solenoid directional valve 14.

[0049] After the second telescopic cylinder 6 retracts and closes to its final position, the controller receives information from the position switch 12. The circuit of the position switch 12 on the first telescopic cylinder 4, which is away from the telescopic end, is disconnected and remains unchanged. The circuit of the position switch 12 on the first telescopic cylinder 4, which is close to the telescopic end, is connected and remains unchanged. The circuit of the position switch 12 on the second telescopic cylinder 6, which is away from the telescopic end, is connected and changes its state. The circuit of the position switch 12 on the second telescopic cylinder 6, which is close to the telescopic end, is disconnected and remains unchanged. Based on the circuit of the position switch 12 and the circuit change, the controller controls the normally open port 21 of the first electromagnetic reversing valve 11 to close and the normally closed port 22 to open. The telescopic end of the first telescopic cylinder 4 retracts, and the controller controls the normally open port 21 of the second electromagnetic reversing valve 14 to close and the normally closed port 22 to close. The second telescopic cylinder 6 remains stationary.

[0050] When the first telescopic cylinder 4 retracts, the controller receives information from the position switch 12. The circuit of the position switch 12 on the first telescopic cylinder 4 that is far from the telescopic end is disconnected and its state remains unchanged. The circuit of the position switch 12 that is close to the telescopic end is disconnected and its state changes. The circuit of the position switch 12 on the second telescopic cylinder 6 that is far from the telescopic end is turned on and its state remains unchanged. The circuit of the position switch 12 that is close to the telescopic end is disconnected and its state remains unchanged. Based on the circuit of the position switch 12 and the circuit change, the controller does not change the air port of the first electromagnetic reversing valve 11 and the second electromagnetic reversing valve 14.

[0051] After the first telescopic cylinder 4 retracts and closes to its final position, the controller receives information from the position switch 12. The circuit of the position switch 12 on the first telescopic cylinder 4, which is furthest from the telescopic end, is turned on, and its state changes. The circuit of the position switch 12 on the second telescopic cylinder 6, which is furthest from the telescopic end, is turned on, and its state remains unchanged. The circuit of the position switch 12 on the second telescopic cylinder 6, which is furthest from the telescopic end, is turned on, and its state remains unchanged. The circuit of the position switch 12 on the second telescopic cylinder 6, which is furthest from the telescopic end, is turned off, and its state remains unchanged. Based on the circuit of the position switch 12 and the circuit change, the controller controls the normally open port 21 of the first solenoid directional valve 11 to close and the normally closed port 22 to close. It also controls the normally open port 21 of the second solenoid directional valve 14 to close and the normally closed port 22 to close, thus completing one test of the bellows 13. If the bellows 13 needs to be tested again, the above process can be repeated. If no test is required, the bellows 13 can be removed.

[0052] Unless otherwise defined, the same reference numerals in the embodiments and drawings of this disclosure have the same meaning.

[0053] The accompanying drawings of the embodiments disclosed herein only involve structures relevant to the embodiments of this disclosure; other structures can be referred to in a general design.

[0054] For clarity, components or areas are enlarged in the accompanying drawings used to describe embodiments of this disclosure. It will be understood that when an element is referred to as being "above" or "below" another element, the element may be "directly" located "above" or "below" the other element, or there may be intermediate elements present.

[0055] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A testing device for a transmission valve bellows, comprising a stand (1), a base (2), and a mounting base (3), wherein the base (2) is fixedly mounted on the upper surface of the stand (1), and the mounting base (3) is vertically mounted on the upper surface of the base (2), characterized in that: The upper end of the mounting base (3) is provided with a first telescopic cylinder (4), and the telescopic end of the first telescopic cylinder (4) is connected to a first connecting block (5). The first connecting block (5) is slidably adapted to the mounting base (3). The upper surface of the base (2) is provided with a second telescopic cylinder (6), and the telescopic end of the second telescopic cylinder (6) is connected to a second connecting block (8) through a connector (7). The second connecting block (8) is slidably adapted to the base (2). The first connecting block (5) is used to connect the upper end of the bellows (13), and the second connecting block (8) is used to connect the lower end of the bellows (13). The sliding direction of the first connecting block (5) is perpendicular to the sliding direction of the second connecting block (8). The first telescopic cylinder (4) is connected to a first electromagnetic reversing valve (11) via a speed regulating connector (9) and an air pipe (10), and the second telescopic cylinder (6) is connected to a second electromagnetic reversing valve (14) via a speed regulating connector (9) and an air pipe (10). Both the first telescopic cylinder (4) and the second telescopic cylinder (6) are equipped with two position switches (12). The position switches (12) are used to detect whether the first telescopic cylinder (4) and the second telescopic cylinder (6) are closed or opened. The first connecting block (5) and the second connecting block (8) both have grooves at their centers that are adapted to the diameter of the bellows (13). The upper end of the bellows (13) is provided with a first connecting ring (17), and the lower end of the bellows (13) is provided with a second connecting ring (18). The first connecting ring (17) and the first connecting block (5) are fixed by screws (19). The outer wall of the second connecting ring (18) is fitted with a sealing ring (20). The sealing ring (20) is interference-fitted with the groove on the second connecting block (8). The position switch (12) is a reed switch, and both the first telescopic cylinder (4) and the second telescopic cylinder (6) are equipped with permanent magnet rings adapted to the position switch.

2. The testing device for a transmission valve bellows according to claim 1, characterized in that: When the second telescopic cylinder (6) is closed, the line connecting the midpoint of the first connecting block (5) and the midpoint of the second connecting block (8) is parallel to the telescopic direction of the telescopic end of the first telescopic cylinder (4).

3. The testing device for a transmission valve bellows according to claim 2, characterized in that: The position switch (12), the first electromagnetic reversing valve (11), and the second electromagnetic reversing valve (14) are all connected to the controller.

4. A test method for a test apparatus for a transmission valve bellows, used in the test apparatus for a transmission valve bellows as described in any one of claims 1-3, characterized in that: Both the position switches (12) on the first telescopic cylinder (4) and the second telescopic cylinder (6) detect that the first telescopic cylinder (4) and the second telescopic cylinder (6) are closed. The upper end of the bellows (13) is connected to the first connecting block (5), and the lower end of the bellows (13) is connected to the second connecting block (8). The first telescopic cylinder (4) is started, and the telescopic end of the first telescopic cylinder (4) moves downward and extends, pushing the first connecting block (5) downward to compress the bellows (13). When the telescopic end of the first telescopic cylinder (4) moves downward and triggers the position switch (12), it indicates that the first telescopic cylinder (4) is open and stops working. At the same time, the second telescopic cylinder (6) is started, and the telescopic end of the second telescopic cylinder (6) moves outward and extends, pushing the second connecting block (8) to move laterally through the connector (7). When the second telescopic cylinder (6) moves downward and triggers the position switch (12), it indicates that the first telescopic cylinder (4) is open and stops working. At the same time, the second telescopic cylinder (6) is started, and the telescopic end of the second telescopic cylinder (6) moves outward and extends, pushing the second connecting block (8) to move laterally through the connector (7). When the extension end of cylinder (6) moves to the trigger position switch (12), it indicates that the second extension cylinder (6) is in the open position. The second electromagnetic reversing valve (14) is activated and switches the air path. The extension end of the second extension cylinder (6) moves inward to retract and pulls the second connecting block (8) laterally through the connecting piece (7). When the extension end of the second extension cylinder (6) moves to the trigger position switch (12), it indicates that the second extension cylinder (6) is in the closed position. The second extension cylinder (6) stops working. At the same time, the first electromagnetic reversing valve (11) is activated and switches the air path. The first extension cylinder (4) is activated. The extension end of the first extension cylinder (4) moves upward to retract. When the extension end of the first extension cylinder (4) moves to the trigger position switch (12), it indicates that the first extension cylinder (4) is in the closed position. The first extension cylinder (4) stops working, completing one test of the bellows (13).

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