Vibration test tool for gearbox control valve

Abstract

The embodiment of the utility model provides a gearbox control valve vibration test tool, and the tool comprises a vibration table which comprises a first body, and the first body comprises two side walls which are disposed away from each other; the supporting assembly comprises a bottom plate, an elastic piece and a limiting column, the bottom plate is arranged below the first body in the third direction, the bottom plate and the first body are arranged in a spaced mode, the elastic piece is connected between the first body and the bottom plate, and the limiting column is connected to the bottom plate and is in clearance fit with at least one side wall; the driving assembly is used for driving the first body to move towards the bottom plate in the third direction; in the process that the first body moves towards the bottom plate, the first body compresses the elastic piece, the elastic piece generates restoring force, and under the condition that the driving assembly is away from the first body, the restoring force drives the first body to vibrate in the third direction. The vibration test tool in the embodiment of the utility model can more accurately simulate the real vibration working condition of the gearbox, so that the accuracy of the performance test result of the control valve under the vibration working condition is improved.

Description

Technical Field

[0001] This application belongs to the field of testing tooling technology, specifically relating to a vibration testing tooling for a gearbox control valve. Background Technology

[0002] Transmission assembly remanufacturing refers to the repair and replacement of old transmissions to meet the quality standards of new transmissions, while simultaneously achieving the goals of resource recycling and environmental protection. To ensure the performance and quality of the modified transmission assembly meet standards, testing is necessary. Control valves, as actuators in the transmission's hydraulic system, control the pressure and flow rate within the system; their control accuracy is crucial to transmission performance. To test the performance of the control valves, the transmission needs to be subjected to an environment closely resembling real-world vibration conditions.

[0003] In related technologies, test fixtures used for testing transmission control valves employ a vibration motor and spring to drive the transmission to vibrate, thus providing a vibrational working environment for the transmission. However, the vibration force generated by this test fixture differs from the vibration frequency under bumpy road conditions during actual vehicle operation, leading to significant deviations in the test results for the control valve performance. Utility Model Content

[0004] This application aims to provide a vibration testing fixture for a gearbox control valve to solve the problem that the existing testing fixtures have a large difference between the vibration frequency and the vibration frequency under actual working conditions, resulting in poor accuracy of the test results for the control valve performance.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0006] This application discloses a vibration testing fixture for a transmission control valve, the vibration testing fixture for the transmission control valve comprising:

[0007] A vibration table includes a first body for housing a gearbox and includes two sidewalls disposed opposite to each other along a first direction.

[0008] The support assembly includes a base plate, an elastic element, and a limiting post. The base plate is disposed below the first body along a third direction and spaced apart from the first body. The elastic element connects the first body and the base plate and provides support for the first body. The limiting post is connected to the base plate and has at least one of the sidewalls in clearance engagement.

[0009] And a drive assembly connected to the end of the limiting post away from the base plate, the drive assembly being used to drive the first body to move toward the base plate along the third direction;

[0010] During the movement of the first body toward the base plate, the first body compresses the elastic element, and the elastic element generates a restoring force along the third direction. When the driving component moves away from the first body, the restoring force drives the first body to vibrate along the third direction, and the first direction intersects with the third direction.

[0011] Based on the above technical means, the vibration frequency of the first body is made closer to the vibration frequency of the gearbox under real vibration conditions during vehicle operation, thereby improving the accuracy of the test results of the control valve performance.

[0012] Optionally, the number of the limiting posts is at least two, and the at least two limiting posts are arranged around at least two of the side walls.

[0013] According to the above-mentioned technical means, the vibration of the first body is limited from both sides in the first direction, further constraining the vibration direction of the first body, making the movement of the first body more stable and precise, thereby enabling more accurate simulation of the vibration environment under actual working conditions.

[0014] Optionally, each of the sidewalls is clearance-fitted with a plurality of limiting posts spaced apart along a second direction, wherein the second direction intersects the first direction and the third direction in pairs.

[0015] According to the above technical means, the cooperation between the first limiting part and the second limiting part can ensure that the vibration table vibrates within the preset vibration amplitude, reduce the risk of vibration table damage, and ensure the reliability of test results.

[0016] Optionally, the limiting post is provided with a first limiting part, and the first body is provided with a second limiting part. The first limiting part and the second limiting part cooperate to limit the movement stroke of the first body along the third direction.

[0017] According to the above technical means, the cooperation between the first limiting part and the second limiting part can ensure that the vibration table vibrates within the preset vibration amplitude, reduce the risk of vibration table damage, and ensure the reliability of test results.

[0018] Optionally, the first limiting part is a limiting groove provided near the side wall, and the second limiting part is a protrusion protruding from the first body along the first direction, the protrusion extending into the limiting groove and rollingly engaging with the groove wall of the limiting groove.

[0019] Based on the above technical means, the friction between the limiting post and the first body can be reduced, thereby making the movement of the first body smoother and the vibration frequency and amplitude of the gearbox closer to the target value.

[0020] Optionally, the protrusion includes a housing, a rotating shaft, and a roller. The housing is connected to the side wall and has a receiving cavity. The receiving cavity has an opening on the side opposite to the side wall along the first direction. The rotating shaft is disposed along the second direction and connected to the receiving cavity. The roller is rotatably connected to the rotating shaft. The roller is at least partially exposed outside the opening and rolls with the groove wall. The second direction intersects the first direction and the third direction in pairs.

[0021] Based on the above technical means, the protrusion has a reasonable and compact structure, which not only facilitates installation and fixation with the first body, but also improves the maintainability of the tooling.

[0022] Optionally, one of the first body and the base plate is provided with a guide hole, and the other of the first body and the base plate is connected with a guide post. The guide post is opposite to the guide hole in the third direction, and the guide post extends at least partially into the guide hole.

[0023] Based on the aforementioned technical means, the cooperation between the guide post and the guide hole provides precise guidance for the vibration of the first body in a third direction.

[0024] Optionally, there are multiple guide holes and multiple guide posts, which are spaced apart between the first body and the base plate.

[0025] Based on the above technical means, the cooperation structure of multiple guide holes and guide posts further reduces the offset, shaking or tilting of the first body during the movement process, improves the stability and accuracy of the first body's movement, and improves the reliability and effectiveness of the control valve test results.

[0026] Optionally, the elastic element is a spring, which is sleeved on the outside of the guide post.

[0027] Based on the above technical means, the guide post can play a certain constraining role on the spring, reducing the possible deviation and twisting of the spring during the movement, making the movement of the first body more stable and precise, and improving the accuracy and reliability of the test results.

[0028] Optionally, the driving assembly includes an electric telescopic rod and a pressure plate. The electric telescopic rod is disposed opposite to the first body along the third direction. One end of the electric telescopic rod is connected to the limiting post, and the other end is movable along the third direction. The pressure plate is connected to the end of the electric telescopic rod close to the first body along the third direction. The electric telescopic rod is used to drive the pressure plate to move along the third direction, so as to drive the first body to move toward the base plate.

[0029] Based on the aforementioned technical means, the combined structure of the electric telescopic rod and the pressure plate is relatively simple, with fewer parts, and is easy to manufacture and install. The pressure plate can evenly transmit the driving force to the first body, reducing local stress concentration caused by uneven force on the first body.

[0030] Optionally, the support assembly further includes a base, the base comprising a support block, a first buffer pad, and an anti-slip pad, the support block being connected to the bottom of the base plate, the number of support blocks being at least two, the at least two support blocks being stacked along the third direction, the first buffer pad being disposed between two adjacent support blocks, and the anti-slip pad being connected to the support block of the plurality of support blocks that is away from the base plate.

[0031] Based on the above technical means, the first buffer pad can reduce the impact of external vibration on the gearbox vibration; the anti-slip pad can prevent the tooling from sliding or shifting during the test.

[0032] In this embodiment, the first body is driven closer to the base plate by the drive component. The first body compresses the elastic element connected between the first body and the base plate, causing the elastic element to generate a restoring force along a first direction. After the drive component moves away from the first body, this restoring force can drive the first body to vibrate, providing vibration conditions for the gearbox placed on the first body. Since the limiting post is connected to the base plate and has a clearance fit with at least one side wall of the first body, the setting of the limiting post can constrain the vibration direction of the first body during vibration, reducing the unexpected outward vibration of the first body and ensuring that the first body vibrates along a third direction. This makes the vibration frequency of the first body closer to the vibration frequency of the gearbox under real vibration conditions during vehicle operation, thereby improving the accuracy of the control valve performance test results.

[0033] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the structure of the vibration testing fixture for the gearbox control valve in the embodiments of this application;

[0035] Figure 2 This is a schematic diagram of the vibration testing fixture for the gearbox control valve from another angle in an embodiment of this application;

[0036] Figure 3 This is a partial cross-sectional view of the vibration testing fixture for the gearbox control valve in an embodiment of this application;

[0037] Figure 4 This is a schematic diagram of the structure of the protrusion in an embodiment of this application;

[0038] Figure 5 This is a schematic diagram of the base structure in an embodiment of this application.

[0039] Among them, 10-vibration table, 11-first body, 111-guide hole, 112-protrusion, 1121-shell, 1122-rotating shaft, 1123-roller, 1124-second buffer pad, 12-second body, 121-through groove, 20-support assembly, 21-base plate, 211-guide post, 22-elastic element, 23-limiting post, 231-limiting groove, 232-extension, 24-base, 241-support block, 242-first buffer pad, 243-anti-slip pad, 244-connecting layer, 30-drive assembly, 31-electric telescopic rod, 32-pressure plate, 40-top plate, 50-control valve seat, 51-control valve cover, 60-height adjustment assembly, 61-hydraulic telescopic rod, 62-connecting plate, X-first direction, Y-second direction, Z-third direction. Detailed Implementation

[0040] The embodiments of this application will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. This application can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be understood that the preferred embodiments are only for illustrating this application and are not intended to limit the scope of protection of this application.

[0041] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. Therefore, the drawings only show the components related to this application and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0042] Transmission assembly remanufacturing refers to the repair and replacement of old transmissions to meet or exceed the quality standards of new transmissions, while simultaneously achieving resource recycling and environmental protection goals. To ensure the performance and quality of the modified transmission assembly meet standards, testing is necessary. In a transmission, control valves, as actuators in the hydraulic system, control the pressure and flow rate; their control accuracy is crucial to transmission performance. Specifically, control valves in a transmission can be solenoid valves, which use electrical signals to control the opening and closing of internal oil circuits to achieve gear shifting. To ensure transmission shifting performance and improve transmission efficiency, control valve testing is required. To test the performance of control valves under real-world operating conditions, they need to be placed in an environment close to real-world vibration conditions, meaning the transmission itself needs to be subjected to similar vibration conditions.

[0043] In related technologies, vibration testing fixtures used for testing transmission control valves employ a vibration motor and spring to drive the transmission to vibrate, thus providing a vibratory working environment for the transmission. However, the vibration force generated by this testing fixture differs from the vibration frequency under bumpy road conditions during actual vehicle operation, leading to significant deviations in the test results for the control valve performance.

[0044] Based on this, this application provides a vibration testing fixture for a transmission control valve. The vibration testing fixture in this application embodiment can more accurately simulate the real vibration conditions of the transmission, thereby improving the accuracy of the control valve performance test results under vibration conditions.

[0045] like Figure 1 As shown, the vibration testing fixture for the gearbox control valve in this embodiment includes: a vibration table 10, a support assembly 20, and a drive assembly 30. The vibration table 10 includes a first body 11, which is used to place the gearbox and includes two sidewalls disposed opposite to each other along a first direction X. The support assembly 20 includes a base plate 21, an elastic element 22, and a limiting post 23. The base plate 21 is disposed below the first body 11 and spaced apart from the first body 11 along a third direction Z. The elastic element 22 connects the first body 11 and the base plate 21 and provides support for the first body 11. The limiting post 23 is connected to the base plate 21 for support, and the limiting post 23 is in clearance fit with at least one side wall; the driving assembly 30 is connected to the end of the limiting post 23 away from the base plate 21, and the driving assembly 30 is used to drive the first body 11 to move towards the base plate 21 in the third direction Z; wherein, during the process of the first body 11 moving towards the base plate 21, the first body 11 compresses the elastic member 22, and the elastic member 22 generates a restoring force in the third direction Z. When the driving assembly 30 is away from the first body 11, the restoring force drives the first body 11 to vibrate in the third direction Z.

[0046] In this embodiment, the vibration table 10 includes a first body 11 and a second body 12 arranged at an angle. Specifically, the first body 11 is parallel to the plane formed by the first direction X and the second direction Y, and the second body 12 is parallel to the plane formed by the second direction Y and the third direction Z. The top of the first body 11 is used to place the gearbox. Under the interaction of the drive assembly 30 and the support assembly 20, the first body 11 vibrates along the third direction Z. The gearbox placed on the top of the first body 11 follows the vibration of the first body 11 and vibrates synchronously along the third direction Z, thereby simulating the vibration condition of the gearbox. The second body 12 is arranged perpendicular to the first body 11. The second body 12 is provided with a through groove 121 extending through the second body 12 along the first direction X, and the length direction of the through groove 121 is arranged along the third direction Z. The gearbox control valve vibration testing fixture also includes a top plate 40, a control valve seat 50, and a height adjustment assembly 60. The height adjustment assembly 60 includes a hydraulic telescopic rod 61 and a connecting plate 62. The upper end of the hydraulic telescopic rod 61 is fixed to the side of the second body 12. The connecting plate 62 is connected to the lower end of the hydraulic telescopic rod 61 and passes through the second body 12 along the first direction X via the through slot 121 of the second body 12. The top plate 40 is located on the side of the second body 12 opposite to the hydraulic telescopic rod 61 along the first direction X. The top plate 40 is connected to the connecting plate 62 so that the height can be adjusted along the third direction Z by the hydraulic telescopic rod 61 driven by the connecting plate 62. The top plate 40 and the first body 11 are spaced apart along the third direction Z, forming a receiving space for placing the gearbox. The control valve seat 50 is connected to the side of the top plate 40 opposite to the first body 11 along the third direction Z, and the control valve seat 50 is used to install the control valve. In practical applications, the gearbox can be placed on the first body 11 of the vibration table 10, and then the hydraulic telescopic rod 61 can be activated to press the top plate 40 against the top of the gearbox, ensuring a tight connection between the gearbox and the first body 11 and preventing the gearbox from detaching from the first body 11 during vibration. During the vibration of the first body 11 along the third direction Z, the gearbox, pressed between the first body 11 and the top plate 40, vibrates along with the first body 11, simulating the vibration conditions of the gearbox during actual vehicle operation. The control valve is installed in the control valve seat 50 and connected to the gearbox below the top plate 40 via an oil circuit. When the gearbox vibrates along with the first body 11, the performance and response speed of the control valve can be tested to ensure that the control valve in the remanufactured gearbox assembly can achieve the preset performance level.

[0047] In this embodiment, the driving component 30 can apply a downward pressure along the third direction Z to the first body 11, thereby driving the first body 11 to overcome the elastic force of the elastic member 22 and move closer to the base plate 21. During this process, the elastic member 22 undergoes elastic compression after being compressed. During the compression process, the elastic potential energy stored in the elastic member 22 increases with the increase of its deformation. When the downward pressure continues, the elastic potential energy continues to accumulate. When the downward pressure of the driving component 30 on the first body 11 disappears, the elastic member 22 is no longer subjected to the downward pressure of the first body 11 and will have a tendency to return to its original state, and will generate an elastic restoring force opposite to its compression direction. This elastic restoring force can drive the first body 11 to move upward along the third direction Z. Furthermore, the elastic member 22 has a certain mass, so it will have a certain inertia. Under the action of inertia, the elastic member 22 cannot stop immediately and will eventually exhibit vibration along the third direction Z. Therefore, the first body 11 also vibrates along the third direction Z following the vibration of the elastic member 22.

[0048] In this embodiment, the first body 11 is driven close to the base plate 21 by the drive assembly 30. The first body 11 compresses the elastic member 22 connected between the first body 11 and the base plate 21, causing the elastic member 22 to generate a restoring force along the first direction X. After the drive assembly 30 moves away from the first body 11, this restoring force can drive the first body 11 to vibrate, providing vibration conditions for the gearbox placed on the first body 11. Since the limiting post 23 is connected to the base plate 21 and has a clearance fit with at least one side wall of the first body 11, the setting of the limiting post 23 can play a certain constraint role on the vibration direction of the first body 11 during the vibration of the first body 11, reducing the unexpected vibration of the first body 11 in the third direction Z, ensuring that the first body 11 vibrates along the third direction Z, so that the vibration frequency of the first body 11 is closer to the vibration frequency of the gearbox under real vibration conditions during vehicle operation, thereby improving the accuracy of the test results of the control valve performance.

[0049] Furthermore, in this embodiment, the vibration of the first body 11 originates from the elastic restoring force generated by the elastic element 22 after being compressed. Compared to driving the vibration table 10 through a vibration motor, this driving method allows the magnitude of the driving force to be adjusted by changing the stiffness of the elastic element 22 or the downward pressure provided by the driving component 30. This adjustability enables the vibration table 10 driven by the elastic element 22 to adapt to different experimental or production needs, providing more flexible vibration conditions. In contrast, the vibration frequency and amplitude of the vibration table 10 driven by a vibration motor are usually limited by the motor speed and eccentric block design, resulting in a relatively limited adjustment range. On the other hand, driving the vibration table 10 through the elastic potential energy of the elastic element 22 also has significant advantages in terms of energy consumption. This mechanical driving structure is simpler and has lower maintenance costs.

[0050] It should be noted that, in the embodiments of this application, as Figures 1-5 As shown, the first direction X is the direction indicated by arrow X in the figure, the second direction Y is the direction indicated by arrow Y, and the third direction Z is the direction indicated by arrow Z. The first direction X, the second direction Y, and the third direction Z intersect each other pairwise. Preferably, the first direction X, the second direction Y, and the third direction Z are all perpendicular to each other. For example, the first direction X is the length direction of the gearbox control valve vibration testing fixture, the second direction Y is the width direction of the gearbox control valve vibration testing fixture, and the third direction Z is the height direction of the gearbox control valve vibration testing fixture.

[0051] Optionally, the number of limiting posts 23 is at least two, and at least two limiting posts 23 are arranged around at least two side walls, thereby limiting the vibration of the first body 11 from both sides in the first direction X, further constraining the vibration direction of the first body 11, making the movement of the first body 11 more stable and precise, and the vibration force experienced by the gearbox during vibration testing more uniform and consistent. This allows for a more accurate simulation of the vibration environment under actual working conditions, improving the accuracy and reliability of the test results, and providing more reliable data support for the performance evaluation and optimization of the gearbox control valve. In specific applications, the number of limiting posts 23 that cooperate with the clearance between the two side walls can be the same or different, and can be one or more; this application does not impose a specific limitation on this.

[0052] Furthermore, each sidewall is clearance-fitted with a plurality of limiting posts 23 spaced apart along the second direction Y. It is understood that, due to the large volume of the gearbox, the dimensions of the vibration table 10 in the first direction X, the second direction Y, and the third direction Z are correspondingly large. When each sidewall is limited by only one limiting post 23, the limiting effect may be poor. Therefore, by setting multiple limiting posts 23 spaced apart along the second direction Y to limit each sidewall, the vibration stability of the first body 11 can be further improved, and correspondingly, the test results for the control valve performance are more accurate. For example, in this embodiment, each sidewall is clearance-fitted with two limiting posts 23, and the two limiting posts 23 that fit with the two sidewalls are arranged opposite each other in the second direction Y.

[0053] In this embodiment, the limiting post 23 is provided with a first limiting part, and the first body 11 is provided with a second limiting part. The first limiting part and the second limiting part cooperate to limit the movement stroke of the first body 11 along the third direction Z, thereby preventing the vibration table 10 from generating excessive vibration and ensuring the structural safety and service life of the vibration table 10.

[0054] Specifically, during the upward movement of the first body 11 along the third direction Z, the first limiting part contacts the second limiting part, and the first limiting part restricts the first body 11 from continuing to move upward. It is understood that if the vibration table 10 moves without restriction in the vibration direction, it may exceed its travel range, causing excessive stress or impact on the internal mechanical structure, thereby damaging the equipment and shortening its service life. Furthermore, vibration testing requires precise control of vibration parameters such as frequency and amplitude to simulate actual working conditions or evaluate the performance of control valves under specific vibration environments. If the movement of components in the vibration direction is unrestricted, the actual vibration parameters may deviate from preset values, affecting the accuracy of the test results. Therefore, in this embodiment, by setting the first limiting part and the second limiting part to cooperate, the vibration table 10 can be ensured to vibrate within a preset vibration amplitude, reducing the risk of damage to the vibration table 10 and ensuring the reliability of the test results.

[0055] For example, in some alternative embodiments, the first limiting part is a limiting groove 231 provided near the side wall, and the second limiting part is a protrusion 112 protruding from the first body 11 along the first direction X, the protrusion 112 extending into the limiting groove 231 and rollingly engaging with the groove wall of the limiting groove 231.

[0056] Specifically, such as Figure 3 As shown, the limiting groove 231 is a recessed groove along the first direction X, and its length direction is along the third direction Z. One side of the protrusion 112 is connected to the side wall of the first body 11, and the side of the protrusion 112 away from the side wall along the first direction X rolls into contact with the groove wall of the limiting groove 231. The limiting groove 231 includes three inner walls, and the groove wall of the limiting groove 231 referred to here is the inner wall of the limiting groove 231 that is opposite to the side wall of the first body 11 along the first direction X. During the vibration of the first body 11, the protrusion 112 rolls into contact with the groove wall of the limiting groove 231 along the third direction Z. It is understandable that, due to the certain deviation in the vibration direction of the elastic element 22, during the vibration of the first body 11, its sidewall will contact the inner wall of the limiting groove 231. When the protrusion 112 and the limiting groove 231 are in sliding engagement, the two have greater frictional force in their mutual movement. In this embodiment, by designing the protrusion 112 and the groove wall to be in rolling engagement, the frictional force between the two can be reduced, thereby making the movement of the first body 11 smoother and the vibration frequency and amplitude of the gearbox closer to the target value.

[0057] like Figure 4As shown, the protrusion 112 includes a housing 1121, a rotating shaft 1122, and a roller 1123. The housing 1121 is connected to the side wall and has a receiving cavity. The receiving cavity has an opening on the side opposite to the side wall along the first direction X. The rotating shaft 1122 is disposed along the second direction Y and connected to the receiving cavity. The roller 1123 is rotatably connected to the rotating shaft 1122. The roller 1123 is at least partially exposed outside the opening and rolls with the groove wall.

[0058] In some optional embodiments of this application, the housing 1121 includes five surfaces, which are interconnected to form a receiving cavity with an opening. The two ends of the roller are respectively connected to two opposite surfaces. A roller 1123 passes through the roller and is rotatable about the roller. The roller 1123 has an annular surface surrounding the roller, which is used for rolling engagement with the sidewall of the first body 11. In this embodiment, the protrusion 112 adopts a structural design of housing 1121, rotating shaft 1122, and roller 1123, which is reasonable and compact. The housing 1121 is connected to the side wall of the first body 11 for easy installation and fixation; the rotating shaft 1122 is arranged along the second direction Y and connected in the receiving cavity, providing stable support and a rotating shaft for the roller 1123; the roller 1123 is at least partially exposed in the opening and rolls with the groove wall. This design ensures effective contact between the roller 1123 and the groove wall, and also facilitates the installation, disassembly and maintenance of the roller 1123, improving the maintainability of the tooling.

[0059] Furthermore, a second buffer pad 1124 is provided on the top of the housing 1121. When the housing 1121 vibrates along with the first body 11, the second buffer pad 1124 can buffer the impact between the housing 1121 and the limiting groove 231.

[0060] Optionally, one of the first body 11 and the base plate 21 is provided with a guide hole 111, and the other of the first body 11 and the base plate 21 is connected with a guide post 211. The guide post 211 and the guide hole 111 are opposite each other along the third direction Z, and the guide post 211 extends at least partially into the guide hole 111. The cooperation between the guide post 211 and the guide hole 111 provides precise guidance for the vibration of the first body 11 along the third direction Z. During the process of the first body 11 moving towards the base plate 21 under the action of the drive component 30 and vibrating in the opposite direction under the action of the restoring force of the elastic element 22, the guide post 211 slides in the guide hole 111, ensuring that the first body 11 moves in a straight line along the third direction Z. This reduces the offset, swaying or tilting of the first body 11 during the movement, improves the stability and accuracy of the movement of the first body 11, and improves the reliability and effectiveness of the control valve test results.

[0061] like Figure 3As shown in this embodiment, the first body 11 is provided with a guide hole 111, which extends along the third direction Z. A guide post 211 is provided on the base plate 21, which is opposite to the guide hole 111 along the third direction Z. One end of the guide post 211 is fixedly connected to the base plate 21, and the other end extends into the guide hole 111. It should be noted that the guide hole 111 in this embodiment is a blind hole. In practical applications, the guide hole 111 can also be a through hole penetrating the first body 11 or the base plate 21. Alternatively, the guide hole 111 can also be provided on the base plate 21. Correspondingly, the guide post 211 is connected to the side of the first body 11 near the base plate 21. This application does not impose specific limitations on this.

[0062] Optionally, there are multiple guide holes 111 and multiple guide posts 211, which are spaced apart between the first body 11 and the base plate 21. Through the cooperation structure of multiple guide holes 111 and guide posts 211, the movement of the first body 11 can be guided from multiple positions, thereby more comprehensively restricting the degrees of freedom of the first body 11 in directions other than the third direction Z, and further preventing the first body 11 from deflecting, swaying or other unstable situations during movement.

[0063] Optionally, the elastic element 22 is a spring, which is sleeved on the outside of the guide post 211. Specifically, the spring and the outer wall of the guide post 211 are spaced apart to allow for flexible vibration under the guidance of the guide post 211. In practical applications, the guide post 211 not only cooperates with the guide hole 111 to improve the vibration stability of the first body 11, but also provides a certain constraint on the spring. During compression and extension, the spring deforms along the direction of the guide post 211, reducing possible deviations and twisting during the movement of the spring, thereby further enhancing the guiding stability of the movement of the first body 11 and ensuring that the first body 11 can vibrate more accurately along the third direction Z. Furthermore, since the spring can provide restoring force more stably and the movement of the first body 11 is more stable and precise, the vibration force experienced by the gearbox during vibration testing is more uniform and consistent, thereby more accurately simulating the vibration environment under actual working conditions, improving the accuracy and reliability of test results, and providing more reliable data support for the performance evaluation and optimization of the gearbox control valve.

[0064] Optionally, the drive assembly 30 includes an electric telescopic rod 31 and a pressure plate 32. The electric telescopic rod 31 is disposed opposite to the first body 11 along the third direction Z. One end of the electric telescopic rod 31 is connected to the limiting post 23, and the other end is capable of moving along the third direction Z. The pressure plate 32 is connected to the end of the electric telescopic rod 31 that is close to the first body 11 along the third direction Z. The electric telescopic rod 31 is used to drive the pressure plate 32 to move along the third direction Z, so as to drive the first body 11 to move toward the base plate 21.

[0065] Specifically, the limiting post 23 is further provided with an extension 232, which is connected to the limiting post 23 and extends along the first direction X toward the first body 11, so as to be at least partially opposite to the first body 11 along the third direction Z. The electric telescopic rod 31 is connected to the extension 232 and is opposite to the first body 11 along the third direction Z, thereby facilitating the driving of the first body 11 to move along the third direction Z. It should be noted that the electric telescopic rod 31 in this embodiment can be the electric telescopic rod 31 in the prior art, and the structure of the electric telescopic rod 31 will not be described in detail here. The electric telescopic rod 31 has a fixed end and a free end. The fixed end is connected to the extension 232 of the limiting post 23, and the free end can extend and retract along the third direction Z. The pressure plate 32 is connected to the free end so as to move along the third direction Z following the extension and retraction of the free end. In this embodiment, the precise motion control capability of the electric telescopic rod 31 allows for accurate control of the movement distance and speed of the pressure plate 32 along the third direction Z according to a preset target. Combined with the elastic characteristics of the elastic element 22, this improves the accuracy of the driving process of the first body 11. This combination structure of the electric telescopic rod 31 and the pressure plate 32 is relatively simple, has fewer parts, and is easy to manufacture and install. Furthermore, the pressure plate 32, as the connecting component between the electric telescopic rod 31 and the first body 11, can evenly transmit the driving force to the first body 11, reducing local stress concentration caused by uneven force on the first body 11 and lowering the risk of damage caused by local stress concentration. In addition, the driving assembly adopts a combination structure of the electric telescopic rod and the pressure plate, which is relatively simple in structure, has fewer parts, and is easy to assemble.

[0066] Optionally, the support assembly 20 also includes a base 24, which includes a support block 241, a first buffer pad 242, and an anti-slip pad 243. The support block 241 is connected to the bottom of the base plate 21, and there are at least two support blocks 241 stacked along the third direction Z. The first buffer pad 242 is disposed between two adjacent support blocks 241, and the anti-slip pad 243 is connected to the support block 241 that is away from the base plate 21.

[0067] In this embodiment, a connecting layer 244 is provided between the support block 241 and the base plate 21, and the support block 241 and the base plate 21 are reliably connected through the connecting layer 244. The connecting layer 244 can be a welding layer or an adhesive layer. The first buffer pad 242 provided between the two support blocks 241 can absorb and disperse some energy during the vibration of the first body 11, playing a role in shock absorption and buffering, which helps to reduce the impact of external vibration on the vibration of the gearbox. The anti-slip pad 243 can increase the friction between the support block 241 and the contact surface, preventing the tooling from sliding or shifting during the test.

[0068] The working principle of the gearbox control valve vibration testing fixture provided in this application embodiment is described below:

[0069] First, the control valve is placed in the control valve seat 50 and restricted by the control valve cover 51 before a hydraulic sealing test is performed (pressure range 0-5MPa). After the hydraulic sealing test is completed, when a vibration test is required, the electric telescopic rod 31 is activated. The electric telescopic rod 31 extends and retracts at a frequency of 0.5Hz, with each downward stroke being 20mm. The first body 11 presses down the elastic element 22 to its maximum deformation (compression ratio 60%). During reset, the compressed elastic element 22 releases potential energy, pushing the first body 11 to complete the upward movement in 0.3s. The roller 1123 reduces the frictional resistance between the first body 11 and the limiting post 23, so that the vibration acceleration reaches more than 5g. After the electric telescopic rod 31 is activated, its free end pushes the pressure plate 32 downward to compress the first body 11. Under this compression, the first body 11 moves downward under the guidance of the guide post 211 and the guide hole 111, compressing the elastic element 22. During this downward movement, the first body 11 simultaneously drives the protrusion 112 to slide within the limiting groove 231 of the limiting post 23. The roller 1123 of the protrusion 112 assists in the movement of the housing 1121 and the first body 11 by rolling against the wall of the limiting groove 231. When the electric telescopic rod 31 moves downward a certain distance, positioning the first body 11 at the target position, the electric telescopic rod 31 retracts, causing the pressure plate 32 to move upward, thus retracting the pressure plate. The pin applies downward pressure to the first body 11; the first body 11 is then pushed upward and reset quickly by the elastic energy storage and release mechanism of the elastic element 22. Under the guiding action of the guide post 211 and the guide hole 111, a precise composite vibration along the third direction Z is generated; the vibration generated by the first body 11 is used to test the vibration of the control valve inside the control valve seat 50, and the vibration generated by the first body 11 is buffered by the first buffer pad 242 between the two support blocks 241 below the base plate 21. At the same time, the anti-slip pad 243 is used to prevent the entire test fixture from shifting. After the test, the electric telescopic rod 31 is closed and the control valve can be removed.

[0070] In summary, the gearbox control valve vibration testing fixture provided in this application has at least the following advantages:

[0071] In this embodiment, the first body is driven closer to the base plate by the drive component. The first body compresses the elastic element connected between the first body and the base plate, causing the elastic element to generate a restoring force along a first direction. After the drive component moves away from the first body, this restoring force can drive the first body to vibrate, providing vibration conditions for the gearbox placed on the first body. Since the limiting post is connected to the base plate and has a clearance fit with at least one side wall of the first body, the setting of the limiting post can constrain the vibration direction of the first body during vibration, reducing the unexpected outward vibration of the first body and ensuring that the first body vibrates along a third direction. This makes the vibration frequency of the first body closer to the vibration frequency of the gearbox under real vibration conditions during vehicle operation, thereby improving the accuracy of the control valve performance test results.

[0072] The above embodiments are merely preferred embodiments provided to fully illustrate this application, and the scope of protection of this application is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on this application are all within the scope of protection of this application.

Claims

1. A gearbox control valve vibration test tool, characterized in that, The vibration testing fixture for the gearbox control valve includes: The vibration table (10) includes a first body (11) for placing a gearbox and includes two sidewalls disposed opposite to each other along a first direction (X); The support assembly (20) includes a base plate (21), an elastic element (22), and a limiting post (23). The base plate (21) is disposed below the first body (11) along a third direction (Z) and spaced apart from the first body (11). The elastic element (22) is connected between the first body (11) and the base plate (21) and provides support for the first body (11). The limiting post (23) is connected to the base plate (21) and the limiting post (23) is in clearance fit with at least one of the side walls. And a drive assembly (30) connected to the end of the limiting post (23) away from the base plate (21), the drive assembly (30) being used to drive the first body (11) to move toward the base plate (21) along the third direction (Z); During the movement of the first body (11) toward the base plate (21), the first body (11) compresses the elastic element (22), and the elastic element (22) generates a restoring force along the third direction (Z). When the drive assembly (30) moves away from the first body (11), the restoring force drives the first body (11) to vibrate along the third direction (Z), and the first direction (X) intersects with the third direction (Z).

2. The gearbox control valve vibration test tooling of claim 1, wherein, The number of the limiting posts (23) is at least two, and the at least two limiting posts (23) are arranged around at least two of the side walls.

3. The vibration testing fixture for the gearbox control valve according to claim 1 or 2, characterized in that, Each of the sidewalls is clearance-fitted with a plurality of limiting posts (23) spaced apart along a second direction (Y), which intersects the first direction (X) and the third direction (Z) in pairs.

4. The gearbox control valve vibration test fixture of claim 1, wherein, The limiting post (23) is provided with a first limiting part, and the first body (11) is provided with a second limiting part. The first limiting part and the second limiting part cooperate to limit the movement stroke of the first body (11) along the third direction (Z).

5. The gearbox control valve vibration test tooling of claim 4, wherein, The first limiting part is a limiting groove (231) provided near the side wall, and the second limiting part is a protrusion (112) protruding from the first body (11) along the first direction (X). The protrusion (112) extends into the limiting groove (231) and rolls with the groove wall of the limiting groove (231).

6. The gearbox control valve vibration test tooling of claim 5, wherein, The protrusion (112) includes a housing (1121), a rotating shaft (1122), and a roller (1123). The housing (1121) is connected to the side wall and has a receiving cavity. The receiving cavity has an opening on the side opposite to the side wall along the first direction (X). The rotating shaft (1122) is arranged along the second direction (Y) and connected to the receiving cavity. The roller (1123) is rotatably connected to the rotating shaft (1122). The roller (1123) is at least partially exposed outside the opening and rolls with the groove wall. The second direction (Y) intersects the first direction (X) and the third direction (Z) in pairs.

7. The gearbox control valve vibration test fixture of claim 1, wherein, One of the first body (11) and the base plate (21) is provided with a guide hole (111), and the other of the first body (11) and the base plate (21) is connected with a guide post (211). The guide post (211) is opposite to the guide hole (111) along the third direction (Z), and the guide post (211) extends at least partially into the guide hole (111).

8. The vibration testing fixture for the gearbox control valve according to claim 7, characterized in that, The number of guide holes (111) and guide posts (211) is multiple, and the multiple guide holes (111) and multiple guide posts (211) are distributed at intervals between the first body (11) and the base plate (21).

9. The gearbox control valve vibration test tooling of claim 7 or 8, wherein, The elastic element (22) is a spring, which is sleeved on the outside of the guide post (211).

10. The gearbox control valve vibration test fixture of claim 1, wherein, The drive assembly (30) includes an electric telescopic rod (31) and a pressure plate (32). The electric telescopic rod (31) is disposed opposite to the first body (11) along the third direction (Z). One end of the electric telescopic rod (31) is connected to the limiting post (23), and the other end is capable of moving along the third direction (Z). The pressure plate (32) is connected to the end of the electric telescopic rod (31) that is close to the first body (11) along the third direction (Z). The electric telescopic rod (31) is used to drive the pressure plate (32) to move along the third direction (Z) so as to drive the first body (11) to move toward the base plate (21).

11. The vibration testing fixture for the gearbox control valve according to claim 1, characterized in that, The support assembly (20) also includes a base (24), which includes a support block (241), a first buffer pad (242), and an anti-slip pad (243). The support block (241) is connected to the bottom plate (21), and there are at least two support blocks (241). The at least two support blocks (241) are stacked along the third direction (Z). The first buffer pad (242) is disposed between two adjacent support blocks (241), and the anti-slip pad (243) is connected to the support block (241) that is away from the bottom plate (21) among the plurality of support blocks (241).

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