A transmission assembly valve body testing apparatus and method

Abstract

The present application relates to the technical field of valve body testing, and discloses a transmission assembly valve body testing device, which comprises a testing bin and a conveying mechanism. The device conveys product trays loaded with valve body products to testing stations in the testing bin for oil supply simulation testing through the conveying mechanism. The testing stations are provided with upper tray butt joint mechanisms and lower tray butt joint mechanisms distributed upward and downward. The upper tray butt joint mechanism comprises an upper oil passage block assembly adapted to the upper end oil port of the valve body product. The upper oil passage block assembly is adjusted in height by a lifting assembly to butt joint with the upper end oil port of the valve body product, and comprehensive tests of rotation speed / torque, flow rate and pressure are carried out. The present application can complete comprehensive tests of rotation speed / torque, flow rate and pressure at the same station. The motor-driven test shaft of the upper oil passage block assembly simulates rotation speeds under different working conditions, and cooperates with the hydraulic oil supply system to adjust pressure, so that gear pump torque, oil port flow rate and pressure data can be synchronously obtained.

Description

Technical Field

[0001] This invention relates to the field of valve body testing technology, specifically to a testing device and method for a transmission assembly valve body. Background Technology

[0002] The transmission valve body is the core hydraulic control module of an automatic transmission. It is usually made of aluminum alloy or cast iron and contains complex oil passages, valves, solenoids and sensors. Its core function is to precisely control the engagement and disengagement of the clutch and brake through hydraulic or electrical signals to achieve gear shifting, pressure regulation and lubrication and cooling, which directly affects the smoothness of shifting, response speed and transmission life.

[0003] Currently, during the production process of the transmission assembly valve body, a series of tests need to be performed on the transmission assembly valve body, as follows:

[0004] 1. Since the shift logic and oil pressure regulation of the transmission need to be dynamically adjusted according to the engine speed (RPM) and output torque, it is necessary to perform speed / torque tests on the assembly valve body to verify the adaptability of the valve body to load changes.

[0005] 2. Since the flow characteristics of the valve body oil passage and solenoid valve directly affect the shifting speed and lubrication effect, it is necessary to test the flow of the assembly valve body to ensure the oil supply efficiency of the hydraulic system.

[0006] 3. Since the valve body needs to maintain a stable pressure regulation capability to avoid shift shock or power interruption, it is necessary to perform pressure testing on the assembly valve body to ensure hydraulic control accuracy.

[0007] When performing the above tests on the transmission assembly valve body, it is necessary to conduct separate tests using multiple devices, which results in low testing efficiency and cumbersome operation. Therefore, there is an urgent need to design a test device that can comprehensively test the speed / torque, flow rate, and pressure of the transmission assembly valve body. Summary of the Invention

[0008] To address the technical problems existing in the background art, the present invention proposes a test device and test method for a transmission assembly valve body.

[0009] The present invention proposes a transmission assembly valve body testing equipment, including a test chamber and a conveying mechanism. The product pallet containing the valve body product is transported to the test station in the test chamber by the conveying mechanism for oil supply simulation test. The test station in the test chamber is provided with an upper pallet docking mechanism and a lower pallet docking mechanism distributed vertically.

[0010] The docking mechanism on the tray includes an upper oil passage block assembly that is adapted to the upper oil port of the valve body product. The upper oil passage block assembly is adjusted in height by a lifting component to dock with the upper oil port of the valve body product and to perform comprehensive tests on speed / torque, flow rate and pressure.

[0011] The tray under-dating mechanism includes a lower oil passage block adapted to the lower oil port of the valve body product, and the lower oil passage block is adjusted in height by the lower oil passage block lifting assembly to dock with the lower oil port of the valve body product.

[0012] The lower end of the testing station is also equipped with a base plate, on which a pallet lifting mechanism for positioning the valve body is installed.

[0013] As a further optimization of the present invention, the upper oil passage block assembly includes an upper oil passage block that rises and falls with the movable end of the lifting assembly. The upper end of the upper oil passage block is equipped with a motor for driving the internal gear pump of the valve body product to rotate. The output end of the motor is equipped with a test shaft extending to the lower part of the upper oil passage block. The torque is transmitted to the gear pump through the test shaft. The lower end of the upper oil passage block also has a liftable bolt simulation cylinder. The bolt tightening force required when the valve body is installed is simulated by the pressing of the movable end of the bolt simulation cylinder against the upper end of the valve body product.

[0014] As a further optimization of the present invention, the upper end of the valve body product is equipped with a detachable transmission component. One end of the transmission component extends downward into the drive hole of the valve body product and meshes with the input end of the gear pump. The other end of the transmission component extends upward and is keyed to the test shaft.

[0015] As a further optimization of the present invention, the lifting assembly includes a fixed plate installed on the upper end of the test chamber. A lifting cylinder for driving the upper oil circuit block assembly to lift is installed on the fixed plate. A plurality of sleeves are also installed on the fixed plate evenly distributed around the lifting cylinder. A movable rod is slidably fitted inside each sleeve. One end of the movable rod extends to the top of the fixed plate and is equipped with a stop block for preventing detachment. The other end of the movable rod extends to the bottom of the fixed plate and is fixed to the upper oil circuit block assembly.

[0016] As a further optimization of the present invention, the upper end of the lower oil passage block has a test oil port that corresponds to and is adapted to the lower oil port of the valve body product. The lower oil passage block is installed on the movable end of the lower oil passage block lifting assembly. The lower oil passage block is driven to move upward by the lower oil passage block lifting assembly and dock with the lower end of the valve body product for positioning.

[0017] As a further optimized solution of the present invention, the lower oil manifold lifting assembly includes a lifting cylinder, a cantilever, a support plate, a support platform, and a fixing column. The lifting cylinder and the fixing column are symmetrically installed on the upper two sides of the base plate. The cantilever is installed on the upward movable end of the lifting cylinder. The support plate is disposed between the lifting cylinder and the fixing column, and one end of the support plate is fixed to the free end of the cantilever through a connecting rod. The other end of the support plate extends horizontally and is slidably assembled with the groove on the inner sidewall of the fixing column. The support platform is installed on the support plate, and the upper end surface of the support platform serves as the mounting surface of the lower oil manifold.

[0018] As a further optimization of the present invention, the two ends of the support platform extend to the outer sides of the support plate and are symmetrically arranged. The bottom plate is also equipped with a support component for supporting the lower part of the two ends of the support platform. When the support platform drives the lower oil circuit block to move upward and connect with the lower end of the valve body product, the movable end of the support component moves to the lower part of the two ends of the support platform for auxiliary support.

[0019] As a further optimization of the present invention, the pallet lifting mechanism includes two pallet lifting units symmetrically distributed below the test station. Each pallet lifting unit includes a positioning cylinder, a movable plate, and a positioning rod. The positioning cylinder is mounted on the base plate and located below the lower oil circuit block. The movable plate is mounted on the movable end of the positioning cylinder and is raised and lowered by the positioning cylinder. There are two positioning rods symmetrically distributed at both ends of the movable plate. The end of the positioning rod away from the movable plate extends vertically upward and is higher than the initial position of the movable end of the lower oil circuit block lifting assembly. The four positioning rods are arranged in a rectangular array and correspond to the four pallet positioning holes of the product pallet. The upper end of the positioning rod is inserted into the adjacent pallet positioning hole for positioning.

[0020] As a further optimization of the present invention, the product tray has a through hole in the middle for the lower oil passage block to connect with the lower oil port of the valve body. The lower oil passage block has a positioning hole that is interference-fitted with the positioning ring of the valve body to prevent the valve body from shaking. A socket is installed on the product tray, and the socket is integrated with the accompanying test harness on the product tray. A power supply component that is plugged into the socket is installed on the base plate to supply power to the test harness.

[0021] A test method for a transmission assembly valve body, the specific steps of which are as follows:

[0022] S1 assembles the valve body products onto the product tray at the loading station, installs the transmission component in the drive hole of the valve body products, and transports the product tray and the valve body products on it to the test station in the test chamber through the conveying mechanism.

[0023] S2 drives the movable plate and positioning rods to rise through the positioning cylinder, so that the upper ends of the four positioning rods are respectively inserted and positioned into the pallet positioning holes adjacent to the lower end of the product pallet.

[0024] S3 drives the cantilever, bearing plate, and bearing platform to rise through the lifting cylinder, which causes the bearing platform to move the lower oil passage block upward, and the test oil port at the upper end of the lower oil passage block connects with the lower oil port of the valve body product.

[0025] S4 drives the slide table to move along the guide rail downwards from the support platform through the translation cylinder, so that the upper ends of the four support columns provide auxiliary support to the lower four points of the support platform.

[0026] S5 drives the upper oil circuit block to descend through the lifting cylinder, so that the test shaft is connected to the key of the transmission component. Then, through the downward extension of the moving end of the bolt simulation cylinder, multiple bolt simulation cylinders press the corresponding bolt holes respectively to simulate the bolt preload required when the valve body is installed on the vehicle.

[0027] S6 starts test mode one: close other oil circuits and keep only the valve body oil inlet and valve body oil outlet. At this time, the test shaft is driven to rotate by the motor, which drives the gear pump in the valve body to rotate, thereby testing the gear pump torque, oil inlet flow, oil outlet flow and oil inlet-outlet flow difference of the valve body at different speeds.

[0028] S7 activates test mode two: close the oil outlet, leaving only the valve body oil inlet and other test oil ports open. At this time, set the oil supply pressure at the valve body oil inlet and test the flow rate of the other test oil ports of the valve body under different oil supply pressures and different speeds.

[0029] S8 activates test mode three: close the oil outlet, leaving only the valve body oil inlet and other test oil ports open. At the same time, power is supplied to the valve body test wiring harness by pushing the cylinder drive plug to the socket. At this time, the oil supply pressure is set at the valve body oil inlet, and the C1 port pressure of the valve body is tested under different oil supply pressures and different speeds.

[0030] The transmission assembly valve body testing equipment and testing method proposed in this invention have the following beneficial effects:

[0031] (I) Integrated testing platform to achieve one-stop testing of multiple parameters

[0032] By combining the upper and lower docking mechanisms on the pallet in the test chamber, comprehensive testing of speed / torque, flow rate and pressure can be completed at the same station. The motor-driven test shaft of the upper oil circuit block component simulates the speed under different working conditions. With the hydraulic oil supply system adjusting the pressure, the gear pump torque, oil port flow rate and pressure data can be obtained simultaneously. Actual tests show that this design reduces the single valve body test time from the traditional 40 minutes to 15 minutes, improving efficiency by 167%, and avoiding the cumulative error caused by multiple clamping.

[0033] (ii) Simulate vehicle loading conditions to improve the realism and reliability of testing.

[0034] The bolt simulation cylinder applies a preload of 50-300N to the upper part of the valve body through its movable end, accurately replicating the bolt tightening state during vehicle assembly. When testing a certain model of valve body, the simulation cylinder applies a preload of 200N, consistent with the actual assembly conditions. This solves the problem of misjudgment of sealing performance caused by insufficient preload in traditional testing, increasing the sealing test pass rate from 82% to 98%. At the same time, the transmission component connects the test shaft and the gear pump through a spline, ensuring torque transmission without slippage and guaranteeing the authenticity and validity of the speed / torque test data.

[0035] (III) Automated positioning and docking, reducing manual intervention

[0036] The pallet lifting mechanism connects to the positioning holes of the product pallet through four positioning rods, achieving a positioning accuracy of ±0.1mm. The lifting component and the lower oil block lifting component drive the upper and lower oil blocks to automatically connect to the oil port, eliminating the need for manual adjustment throughout the process. The conveying mechanism automatically sends the valve body into the test chamber and automatically sends it out after the test is completed, significantly reducing labor costs and material losses.

[0037] (iv) Multi-mode testing switching to cover full-function testing requirements

[0038] The valve body performance is fully verified through three test modes: Mode 1 tests the meshing of the gear pump and the smoothness of the inlet and outlet ports; Mode 2 tests the flow distribution of lubricating oil holes such as motor shaft and differential; Mode 3 tests the C1 port pressure controlled by the solenoid valve through the power-on component. This design covers all the key parameter tests required for valve body production, and the adaptability is improved by 80% compared with traditional single-function equipment. The whole process test can be completed without changing the equipment.

[0039] (V) Stable support and precise guidance to ensure the accuracy of high-voltage testing

[0040] During high-pressure testing, the support component uses a translation cylinder to drive the support column to form four-point support on the bearing platform (74), with a bearing capacity of 500kg, a bearing platform deformation of ≤0.01mm, and a test data fluctuation of ≤1%. The movable rod of the lifting component cooperates with the sleeve to ensure that the upper oil circuit block is lifted and lowered smoothly, and the oil port is connected without collision, further improving the stability of the test data.

[0041] (vi) Modular design and convenient maintenance reduce usage costs

[0042] The core components, such as the upper and lower oil circuit blocks, adopt standardized interfaces. It only takes 10 minutes to replace the appropriate parts for different models of valve bodies. The hydraulic oil supply system is independently laid out, which facilitates maintenance and pressure calibration. The average annual maintenance cost of the equipment is reduced by 60% compared with the traditional multi-equipment combination. In addition, the test wiring harness is carried with the product tray, reducing wiring loss and extending service life.

[0043] Additional aspects and advantages of the invention 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 the invention. Attached Figure Description

[0044] Figure 1 A three-dimensional structural schematic diagram of the transmission assembly valve body testing equipment provided by the present invention;

[0045] Figure 2 This is a schematic diagram of the internal structure of the test chamber of the transmission assembly valve body test equipment provided by the present invention.

[0046] Figure 3 A schematic diagram of the product tray structure of the transmission assembly valve body testing equipment provided by the present invention;

[0047] Figure 4 This is a first-view structural schematic diagram of the tray-under docking mechanism of the transmission assembly valve body testing equipment provided by the present invention.

[0048] Figure 5 This is a second-view structural schematic diagram of the tray-under docking mechanism of the transmission assembly valve body testing equipment provided by the present invention.

[0049] Figure 6 This is a schematic diagram of the docking mechanism on the tray of the transmission assembly valve body testing equipment provided by the present invention.

[0050] Figure 7 For the present invention Figure 6 Schematic diagram of the cross-sectional structure of the lower and middle oil passage blocks.

[0051] Figure Descriptions: 1. Test Chamber; 2. Conveying Mechanism; 3. Product Pallet; 4. Upper Oil Manifold Block Assembly; 41. Upper Oil Manifold Block; 42. Motor; 43. Test Shaft; 44. Bolt Simulation Cylinder; 5. Lifting Assembly; 51. Fixed Plate; 52. Lifting Cylinder; 53. Sleeve; 54. Movable Rod; 6. Lower Oil Manifold Block; 7. Lower Oil Manifold Block Lifting Assembly; 71. Lifting Cylinder; 72. Cantilever; 73. Bearing Plate; 74. Bearing Platform; 75. Fixed Column; 8. Base Plate; 9. Positioning Cylinder; 10. Movable Plate; 11. Positioning Rod; 12. Guide Rail; 13. Slide Table; 14. Translation Cylinder; 15. Support Column; 16. Column; 17. Plug; 18. Push Cylinder; 19. Socket; 20. Valve Body; 21. Transmission Components; 22. Hydraulic Oil Supply System. Detailed Implementation

[0052] Embodiments of the present invention are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar symbols denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0053] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0054] Please see Figures 1-7 A transmission assembly valve body testing device includes a test chamber 1 and a conveying mechanism 2. The product tray 3 containing the valve body product 20 is conveyed to the test station in the test chamber 1 through the conveying mechanism 2 for oil supply simulation test. The test station in the test chamber 1 is provided with an upper tray docking mechanism and a lower tray docking mechanism distributed vertically.

[0055] The docking mechanism on the tray includes an oil passage block assembly 4 that is adapted to the oil port at the upper end of the valve body product 20. The oil passage block assembly 4 is docked with the oil port at the upper end of the valve body product 20 by adjusting its height through the lifting assembly 5, and performs comprehensive tests on speed / torque, flow rate and pressure.

[0056] The tray under docking mechanism includes a lower oil passage block 6 that is adapted to the lower oil port of the valve body product 20, and the lower oil passage block 6 is docked with the lower oil port of the valve body product 20 by adjusting its height through the lower oil passage block lifting assembly 7.

[0057] A base plate 8 is also installed at the lower end of the testing station, and a pallet lifting mechanism for positioning the valve body product 20 is installed on the base plate 8.

[0058] It also includes a hydraulic oil supply system 22 installed at the rear of the test chamber 1. The hydraulic oil supply system 22 supplies oil to the upper docking mechanism and the lower docking mechanism of the pallet. The hydraulic oil supply system 22 includes a variable pump, a pressure sensor and a flow valve. It can provide adjustable pressure oil from 0 to 3 MPa to meet the oil supply requirements of different test modes. The system response time is ≤50ms and it can quickly switch the oil circuit status. It can cooperate with the upper and lower oil circuit blocks to complete multi-mode tests.

[0059] To address the problem of low efficiency caused by the need for multiple separate devices in traditional valve body testing, this equipment achieves "one-time clamping and multi-parameter testing" through integrated design. The conveying mechanism 2 automatically sends the product tray 3 into the test chamber 1, and the tray lifting mechanism achieves precise positioning of the valve body product 20. The upper and lower oil circuit blocks are respectively connected to the upper and lower oil ports of the valve body. With the help of the hydraulic oil supply system 22, speed / torque, flow rate and pressure tests can be completed simultaneously. The single test time is shortened from the traditional 40 minutes to 15 minutes, and the efficiency is improved by 167%.

[0060] Specifically, such as Figure 6 As shown, the upper oil passage block assembly 4 includes an upper oil passage block 41 that rises and falls with the movable end of the lifting assembly 5. The upper end of the upper oil passage block 41 is equipped with a motor 42 for driving the internal gear pump of the valve body product 20 to rotate. The output end of the motor 42 is equipped with a test shaft 43 extending to the lower part of the upper oil passage block 41. The torque is transmitted to the gear pump through the test shaft 43. The lower end of the upper oil passage block 41 also has a liftable bolt simulation cylinder 44. The bolt tightening force required when the valve body is installed is simulated by the pressing of the movable end of the bolt simulation cylinder 44 against the upper end of the valve body product 20. There are multiple bolt simulation cylinders 44, which are consistent with and correspond to the number of assembly bolt holes.

[0061] Motor 42 is a servo motor with a power of 2kW and an adjustable speed of 0-3000r / min. It transmits torque through test shaft 43, with a measurement range of 0-50N·m and an accuracy of ±0.1N·m, simulating the actual working state of a gear pump. Bolt simulation cylinder 44 can apply a preload of 50-300N, accurately replicating the bolt tightening state during vehicle installation. This solves the problem of misjudgment of sealing performance caused by insufficient preload in traditional testing, increasing the sealing test pass rate from 82% to 98%.

[0062] Furthermore, such as Figure 3 and Figure 6 As shown, a detachable transmission component 21 is mounted on the upper end of the valve body product 20. One end of the transmission component 21 extends downward into the drive hole of the valve body product 20 and meshes with the input end of the gear pump. The other end of the transmission component 21 extends upward and is keyed to the test shaft 43.

[0063] The transmission component 21 adopts an involute spline connection with a keyway fit tolerance of H7 / g6 to ensure that torque transmission is slip-free. The detachable design allows the transmission component 21 to be quickly replaced according to different valve body models and is compatible with various gear pump input end specifications.

[0064] Specifically, such as Figure 6As shown, the lifting assembly 5 includes a fixed plate 51 installed on the upper end of the test chamber 1. A lifting cylinder 52 for driving the upper oil circuit block assembly 4 to lift is installed on the fixed plate 51. A plurality of sleeves 53 are also installed on the fixed plate 51, evenly distributed around the lifting cylinder 52. A movable rod 54 is slidably fitted inside each sleeve 53. One end of the movable rod 54 extends to the top of the fixed plate 51 and is equipped with a stop for preventing detachment. The other end of the movable rod 54 extends to the bottom of the fixed plate 51 and is fixed to the upper oil circuit block assembly 4.

[0065] The lifting cylinder 52 has a stroke of 100mm, driving the upper oil circuit block assembly 4 to lift at a speed of 50mm / s. The cooperation of the four movable rods 54 with the sleeve 53 ensures smooth lifting and avoids collision of the oil port during docking. The stop block design prevents the movable rods 54 from falling off, improving the safety of the equipment.

[0066] Specifically, such as Figure 4 As shown, the upper end of the lower oil passage block 6 has a test oil port that corresponds to and is adapted to the lower oil port of the valve body product 20. The lower oil passage block 6 is installed on the movable end of the lower oil passage block lifting assembly 7. The lower oil passage block 6 is driven to move upward by the lower oil passage block lifting assembly 7 and dock with the lower end of the valve body product 20 for positioning.

[0067] The test port uses an O-ring seal to connect with the lower port of the valve body to ensure no leakage during testing. The lifting accuracy of the lower oil block lifting assembly 7 is ±0.05mm to ensure that the port is aligned and to avoid test errors caused by misalignment.

[0068] Specifically, such as Figure 4 and Figure 5 As shown, the lower oil passage block lifting assembly 7 includes a lifting cylinder 71, a cantilever 72, a support plate 73, a support platform 74, and a fixing column 75. The lifting cylinder 71 and the fixing column 75 are symmetrically installed on both sides of the upper end of the base plate 8. The cantilever 72 is installed on the upward movable end of the lifting cylinder 71. The support plate 73 is disposed between the lifting cylinder 71 and the fixing column 75, and one end of the support plate 73 is fixed to the free end of the cantilever 72 through a connecting rod. The other end of the support plate 73 extends horizontally and is slidably assembled with the groove on the inner side wall of the fixing column 75. The support platform 74 is installed on the support plate 73, and the upper end surface of the support platform 74 serves as the mounting support surface of the lower oil passage block 6.

[0069] The lifting cylinder 71 provides sufficient lifting force, and the cooperation between the bearing plate 73 and the sliding groove of the fixed column 75 restricts lateral displacement, ensuring that the lower oil circuit block 6 is lifted vertically. The bearing platform 74 is made of cast iron with a flatness of ≤0.03mm, ensuring that the lower oil circuit block 6 is installed flat.

[0070] Furthermore, such as Figure 4As shown, the two ends of the support platform 74 extend to the outer sides of the support plate 73 and are symmetrically arranged. The base plate 8 is also equipped with a support component for supporting the lower part of the two ends of the support platform 74. When the support platform 74 drives the lower oil circuit block 6 to move upward and connect with the lower end of the valve body product 20, the movable end of the support component moves to the lower part of the two ends of the support platform 74 for auxiliary support.

[0071] The support assembly includes support units symmetrically distributed on the outer sides of both ends of the support platform 74. Each support unit includes a guide rail 12, a slide table 13, a translation cylinder 14, and a support column 15. The slide table 13 is slidably assembled with the upper end surface of the base plate 8 through the symmetrically distributed guide rail 12. The slide table 13 is located on the side of the support platform 74 and the horizontal distance between the two is adjusted by the translation cylinder 14. There are two support columns 15, which are symmetrically distributed on both sides of the upper end surface of the slide table 13. The slide table 13 and the support column 15 are moved to the lower part of the support platform 74 by the translation cylinder 14, so that the upper end of the support column 15 provides four-point support for the lower end of the support platform 74.

[0072] The support assembly is activated during testing. The translation cylinder 14 drives the slide table 13 to move at a speed of 30 mm / s, so that the four support columns 15 form a four-point support with a load-bearing capacity of 500 kg. The deformation of the support table 74 is ≤0.01 mm, ensuring stable test data with a fluctuation range of ≤1%. The guide rail 12 adopts a linear slide rail with a sliding resistance of ≤5 N, ensuring smooth operation of the support assembly.

[0073] Specifically, such as Figure 4 and Figure 5 As shown, the pallet lifting mechanism includes two pallet lifting units symmetrically distributed below the test station. Each pallet lifting unit has a positioning cylinder 9, a movable plate 10, and a positioning rod 11. The positioning cylinder 9 is installed on the base plate 8 and located below the lower oil circuit block 6. The movable plate 10 is installed on the movable end of the positioning cylinder 9 and is raised and lowered by the positioning cylinder 9. There are two positioning rods 11, which are symmetrically distributed at both ends of the movable plate 10. The end of the positioning rod 11 away from the movable plate 10 extends vertically upward and is higher than the initial position of the movable end of the lower oil circuit block lifting assembly 7. The four positioning rods 11 are arranged in a rectangular array and correspond to the four pallet positioning holes of the product pallet 3. The upper end of the positioning rod 11 is inserted into the adjacent pallet positioning hole for positioning. Movable grooves adapted to the positioning rods 11 are opened on both sides of the bearing plate 73, so that the bearing plate 73 can slide and engage with the four positioning rods 11.

[0074] Four positioning rods 11 engage with the positioning holes of the product tray 3, with a positioning accuracy of ±0.1mm. The positioning cylinder 9 has a stroke of 50mm, which can quickly lift the product tray 3 away from the conveying mechanism 2. The movable groove design avoids interference between the bearing plate 73 and the positioning rods 11, ensuring that the lifting action is smooth.

[0075] Specifically, such as Figures 3-5 The product tray 3 shown has a through hole in the middle for the lower oil passage block 6 to connect with the lower oil port of the valve body product 20. The lower oil passage block 6 has a positioning hole that is interference fit with the valve body positioning ring to prevent the valve body from shaking. The product tray 3 is equipped with a socket 19, and the socket 19 is integrated with the accompanying test wiring harness on the product tray 3. The base plate 8 is equipped with a power supply component that is plugged into the socket 19. The power supply component supplies power to the test wiring harness. The test wiring harness moves with the tray to avoid wiring tangling.

[0076] Furthermore, such as Figure 4 and Figure 5 As shown, the power supply assembly includes a column 16 mounted on the upper end of the base plate 8. A plug 17 and a push cylinder 18 are mounted on the upper end of the column 16. The plug 17 is compatible with and corresponds to the socket 19. The plug 17 is driven to connect to the socket 19 and be powered by the push cylinder 18.

[0077] The push cylinder 18 drives the plug 17 and socket 19 to be connected. The contact resistance is ≤0.1Ω to ensure stable power supply to the solenoid valve and voltage fluctuation is ≤±0.5V.

[0078] A test method for a transmission assembly valve body, the specific steps of which are as follows:

[0079] S1: At the loading station, the valve body product 20 is assembled onto the product tray 3, and the transmission component 21 is installed in the drive hole of the valve body product 20. The product tray 3 and the valve body product 20 on it are transported to the test station in the test chamber 1 through the conveying mechanism 2.

[0080] S2: The positioning cylinder 9 drives the movable plate 10 and the positioning rod 11 to rise, so that the upper ends of the four positioning rods 11 are respectively inserted and positioned into the pallet positioning holes adjacent to the lower end of the product pallet 3.

[0081] S3: The lifting cylinder 71 drives the cantilever 72, the bearing plate 73, and the bearing platform 74 to rise, so that the bearing platform 74 drives the lower oil circuit block 6 to move upward, and the test oil port at the upper end of the lower oil circuit block 6 connects with the lower oil port of the valve body product 20.

[0082] S4: The slide table 13 is driven by the translation cylinder 14 to move along the guide rail 12 to the lower part of the support platform 74, so that the upper ends of the four support columns 15 provide auxiliary support to the lower four points of the support platform 74 respectively.

[0083] S5: The upper oil circuit block 41 is driven to descend by the lifting cylinder 52, so that the test shaft 43 is connected to the transmission component 21 by key. Then, the downward extension of the movable end of the bolt simulation cylinder 44 causes multiple bolt simulation cylinders 44 to press the corresponding bolt holes respectively, simulating the bolt preload required when the valve body is installed on the vehicle.

[0084] S6 starts test mode one: close other oil circuits and keep only the valve body inlet and outlet oil ports open. At this time, the test shaft 43 is driven to rotate by the motor 42, which causes the transmission component 21 to drive the gear pump in the valve body product 20 to rotate, thereby testing the gear pump torque, inlet flow rate, outlet flow rate and inlet-outlet flow rate difference of the valve body at different speeds. In this mode, the main tests are the meshing of the gear pump, the smoothness of the inlet / outlet flow channels and the sealing effect of the valve body at this time.

[0085] S7 opens test mode two: close the oil outlet, leaving only the valve body oil inlet and other test oil ports open. At this time, set the oil supply pressure at the valve body oil inlet and test the flow rate of the other test oil ports under different oil supply pressures and different speeds. In this mode, the main test is the smoothness of the flow path of the other test oil ports.

[0086] S8 activates test mode three: close the oil outlet, leaving only the valve body oil inlet and other test oil ports open. At the same time, power is supplied to the valve body test wiring harness by pushing the cylinder 18 to drive the plug 17 and socket 19. At this time, the oil supply pressure is set at the valve body oil inlet, and the C1 port pressure of the valve body is tested under different oil supply pressures and different speeds. In this mode, the operation of the solenoid valve connected to the test wiring harness is mainly tested, and the sealing effect of the valve body is tested.

[0087] It should be noted that the other oil ports mentioned above include: motor shaft lubrication oil port, differential lubrication oil port, input shaft lubrication oil port, intermediate shaft lubrication oil port, and transmission cooling oil port.

[0088] In summary, this method achieves multi-mode testing through an automated process: Mode 1 uses a motor-driven gear pump to test torque, flow rate, and differential at different speeds; Mode 2 closes the oil outlet and detects the flow distribution of lubricating oil holes in the motor shaft, differential, etc.; Mode 3 uses an energized component to test the pressure at port C1 controlled by the solenoid valve. The entire process requires no manual intervention, covers the full functional testing requirements of the valve body, and automatically stores and generates reports on the test data, reducing labor costs by 80% compared to traditional methods.

[0089] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A transmission assembly valve body testing device, comprising a test chamber (1) and a conveying mechanism (2), wherein a product tray (3) containing valve body products (20) is conveyed to a test station in the test chamber (1) via the conveying mechanism (2) for oil supply simulation testing, and the test station in the test chamber (1) is provided with an upper tray docking mechanism and a lower tray docking mechanism distributed vertically, characterized in that: The tray docking mechanism includes an upper oil passage block assembly (4) that is compatible with the upper oil port of the valve body product (20). The upper oil passage block assembly (4) is adjusted in height by the lifting assembly (5) to dock with the upper oil port of the valve body product (20) and to perform comprehensive tests on speed / torque, flow rate and pressure. The tray under docking mechanism includes a lower oil passage block (6) that is adapted to the lower oil port of the valve body product (20), and the lower oil passage block (6) is docked with the lower oil port of the valve body product (20) by adjusting the height of the lower oil passage block lifting assembly (7). The test station is also equipped with a base plate (8), and a pallet lifting mechanism for positioning the valve body product (20) is installed on the base plate (8). The upper oil passage block assembly (4) includes an upper oil passage block (41) that moves up and down with the moving end of the lifting assembly (5). The upper end of the upper oil passage block (41) is equipped with a motor (42) for driving the internal gear pump of the valve body product (20) to rotate. The output end of the motor (42) is equipped with a test shaft (43) extending to the lower part of the upper oil passage block (41). The torque is transmitted to the gear pump through the test shaft (43). The lower end of the upper oil passage block (41) also has a liftable bolt simulation cylinder (44). The bolt tightening force required when the valve body is installed is simulated by pressing the upper end of the valve body product (20) with the moving end of the bolt simulation cylinder (44). The product tray (3) has a through hole in the middle for the lower oil passage block (6) to connect with the lower oil port of the valve body product (20). The lower oil passage block (6) has a positioning hole that is interference fit with the valve body positioning ring. The product tray (3) is equipped with a socket (19), and the socket (19) is integrated with the accompanying test harness on the product tray (3). The base plate (8) is equipped with a power supply component that is plugged into the socket (19). The power supply component supplies power to the test harness and tests the C1 port pressure controlled by the solenoid valve through the power supply component.

2. The transmission assembly valve body testing equipment according to claim 1, characterized in that, The upper end of the valve body product (20) is equipped with a detachable transmission component (21). One end of the transmission component (21) extends downward into the drive hole of the valve body product (20) and meshes with the input end of the gear pump. The other end of the transmission component (21) extends upward and is keyed to the test shaft (43).

3. The transmission assembly valve body testing equipment according to claim 1, characterized in that, The lifting assembly (5) includes a fixed plate (51) installed on the upper end of the test chamber (1). A lifting cylinder (52) for driving the upper oil circuit block assembly (4) to lift is installed on the fixed plate (51). A plurality of sleeves (53) evenly distributed around the lifting cylinder (52) are also installed on the fixed plate (51). A movable rod (54) is slidably fitted inside each sleeve (53). One end of the movable rod (54) extends to the top of the fixed plate (51) and is equipped with a stop for preventing detachment. The other end of the movable rod (54) extends to the bottom of the fixed plate (51) and is fixed to the upper oil circuit block assembly (4).

4. The transmission assembly valve body testing equipment according to claim 1, characterized in that, The upper end of the lower oil passage block (6) has a test oil port that corresponds to and is compatible with the lower oil port of the valve body product (20). The lower oil passage block (6) is installed on the movable end of the lower oil passage block lifting assembly (7). The lower oil passage block (6) is driven to move upward by the lower oil passage block lifting assembly (7) and dock with the lower end of the valve body product (20) for positioning.

5. The transmission assembly valve body testing equipment according to claim 1, characterized in that, The lower oil passage block lifting assembly (7) includes a lifting cylinder (71), a cantilever (72), a bearing plate (73), a bearing platform (74), and a fixing column (75). The lifting cylinder (71) and the fixing column (75) are symmetrically installed on the upper sides of the base plate (8). The cantilever (72) is installed on the upward movable end of the lifting cylinder (71). The bearing plate (73) is located between the lifting cylinder (71) and the fixing column (75). One end of the bearing plate (73) is fixed to the free end of the cantilever (72) through a connecting rod. The other end of the bearing plate (73) extends horizontally and is slidably assembled with the groove on the inner side wall of the fixing column (75). The bearing platform (74) is installed on the bearing plate (73), and the upper surface of the bearing platform (74) serves as the mounting bearing surface of the lower oil passage block (6).

6. The transmission assembly valve body testing equipment according to claim 5, characterized in that, The two ends of the support platform (74) extend to the outside of the two sides of the support plate (73) and are symmetrically arranged. The bottom plate (8) is also equipped with a support component for supporting the lower part of the two ends of the support platform (74). When the support platform (74) drives the lower oil circuit block (6) to move up and connect with the lower end of the valve body product (20), the movable end of the support component moves to the lower part of the two ends of the support platform (74) for auxiliary support.

7. The transmission assembly valve body testing equipment according to claim 1, characterized in that, The pallet lifting mechanism includes two pallet lifting units symmetrically distributed below the test station. Each pallet lifting unit includes a positioning cylinder (9), a movable plate (10), and a positioning rod (11). The positioning cylinder (9) is installed on the base plate (8) and located below the lower oil circuit block (6). The movable plate (10) is installed on the movable end of the positioning cylinder (9) and is lifted and lowered by the positioning cylinder (9). There are two positioning rods (11) symmetrically distributed at both ends of the movable plate (10). The end of the positioning rod (11) away from the movable plate (10) extends vertically upward and is higher than the initial position of the movable end of the lower oil circuit block lifting assembly (7). The four positioning rods (11) are arranged in a rectangular array and correspond to the four pallet positioning holes of the product pallet (3). The upper end of the positioning rod (11) is inserted into the adjacent pallet positioning hole for positioning.

8. A test method for a transmission assembly valve body, using the transmission assembly valve body test equipment according to any one of claims 1-7, characterized in that, The specific steps are as follows: S1. At the loading station, the valve body product (20) is assembled onto the product tray (3), and the transmission component (21) is installed in the drive hole of the valve body product (20). The product tray (3) and the valve body product (20) on it are transported to the test station in the test chamber (1) through the conveying mechanism (2). S2. The movable plate (10) and the positioning rod (11) are driven to rise by the positioning cylinder (9), so that the upper ends of the four positioning rods (11) are respectively inserted into the positioning holes of the product tray (3) at the lower end. S3. The lifting cylinder (71) drives the cantilever (72), bearing plate (73), and bearing platform (74) to rise, so that the bearing platform (74) drives the lower oil circuit block (6) to move upward, and the test oil port at the upper end of the lower oil circuit block (6) connects with the lower oil port of the valve body product (20). S4. Drive the slide (13) along the guide rail (12) to move downwards on the support platform (74) by the translation cylinder (14), so that the upper ends of the four support columns (15) provide auxiliary support to the lower four points of the support platform (74). S5. Drive the upper oil circuit block (41) to descend by lifting cylinder (52), so that the test shaft (43) is keyed to the transmission component (21). Then, by extending the moving end of the bolt simulation cylinder (44) downward, multiple bolt simulation cylinders (44) press the corresponding bolt holes respectively to simulate the bolt preload required when the valve body is installed. S6. Start test mode one: close other oil circuits and keep only the valve body inlet and outlet. At this time, the test shaft (43) is driven to rotate by the motor (42), so that the transmission component (21) drives the gear pump in the valve body product (20) to rotate, thereby testing the gear pump torque, inlet flow rate, outlet flow rate and inlet-outlet flow rate difference of the valve body at different speeds. S7. Activate test mode two: Close the oil outlet, leaving only the valve body oil inlet and other test oil ports open. At this time, set the oil supply pressure at the valve body oil inlet and test the flow rate of the other test oil ports of the valve body under different oil supply pressures and different speeds. S8. Start test mode three: close the oil outlet, keep only the valve body oil inlet and other test oil ports open, and at the same time, drive the plug (17) and socket (19) of the push cylinder (18) to supply power to the valve body test wiring harness. At this time, set the oil supply pressure at the oil inlet of the valve body and test the C1 port pressure of the valve body under different oil supply pressures and different speeds.

Images