Transmission assembly valve body test equipment and test method

Abstract

The invention relates to the technical field of valve body testing, and discloses transmission assembly valve body testing equipment which comprises a testing bin and a conveying mechanism. According to the equipment, a product tray loaded with a valve body product is conveyed to a test station in a test bin through a conveying mechanism for an oil supply simulation test, and a tray upper docking mechanism and a tray lower docking mechanism which are distributed up and down are arranged at the test station; the tray upper butt joint mechanism comprises an upper oil path block assembly matched with an oil port in the upper end of the valve body product, the height of the upper oil path block assembly is adjusted through a lifting assembly so that the upper oil path block assembly can be in butt joint with the oil port in the upper end of the valve body product, and rotating speed / torque, flow and pressure comprehensive testing is conducted. Comprehensive testing of rotating speed / torque, flow and pressure can be completed at the same station, a motor of the upper manifold block assembly drives a testing shaft to simulate rotating speeds of different working conditions, pressure is adjusted in cooperation with a hydraulic oil supply system, and gear pump torque, oil port flow and pressure data can be synchronously obtained.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of valve body testing, in particular to a transmission assembly valve body testing device and testing method. BACKGROUND

[0002] The transmission assembly valve body is the core hydraulic control module of the automatic transmission, usually made of aluminum alloy or cast iron, containing complex oil channels, valves, solenoids and sensors inside, and its core function is to accurately control the engagement and disengagement of clutches and brakes through hydraulic or electrical signals to achieve gear shifting, pressure regulation and lubrication cooling, directly affecting the smoothness of gear shifting, response speed and transmission life.

[0003] At present, in the production process of the transmission assembly valve body, a series of tests need to be performed on the transmission assembly valve body, specifically as follows:

[0004] 1. Since the gear shifting logic and oil pressure regulation of the transmission need to be dynamically adjusted according to the engine speed (RPM) and output torque, the speed / torque test needs to be performed 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 channel and solenoid directly affect the gear shifting speed and lubrication effect, the flow test needs to be performed on the assembly valve body to ensure the oil supply efficiency of the hydraulic system;

[0006] 3. Since the valve body needs to maintain stable pressure regulation capability to avoid gear shifting impact or power interruption, the pressure test needs to be performed on the assembly valve body to ensure the hydraulic control precision;

[0007] When performing the above tests on the transmission assembly valve body, multiple devices need to be used for separate testing, which is low in testing efficiency and relatively cumbersome to operate, therefore it is urgent to design a testing device capable of comprehensively testing the speed / torque, flow and pressure of the transmission assembly valve body. SUMMARY

[0008] To solve the technical problems in the background art, the present application proposes a transmission assembly valve body testing device and testing method.

[0009] The transmission assembly valve body testing device proposed by the present application comprises a testing bin and a conveying mechanism, which conveys the product tray containing the valve body products to the testing station in the testing bin for oil supply simulation test, and the testing station in the testing bin is provided with an upper tray docking mechanism and a lower tray docking mechanism distributed upward and downward;

[0010] The upper oil passage block assembly on the tray is matched with the upper end oil port of the valve body product, and the upper oil passage block assembly is matched with the upper end oil port of the valve body product by adjusting the height of the lifting assembly, and the comprehensive test of the rotation speed / torque, flow and pressure is carried out;

[0011] The lower oil passage block on the tray is matched with the lower end oil port of the valve body product, and the height of the lower oil passage block is adjusted by the lower oil passage block lifting assembly to be matched with the lower end oil port of the valve body product;

[0012] The lower end of the test station is also provided with a bottom plate, and the tray lifting mechanism for positioning the valve body product is installed on the bottom plate.

[0013] As a further optimized scheme of the present application, the upper oil passage block assembly includes an upper oil passage block that is lifted with the movable end of the lifting assembly, a motor for driving the internal gear pump of the valve body product is installed at the upper end of the upper oil passage block, a test shaft extending below the upper oil passage block is installed at the output end of the motor, the torque is transmitted to the gear pump through the test shaft, and the lower end of the upper oil passage block also has a liftable bolt simulation cylinder that is pressed against the upper end of the valve body product through the movable end of the bolt simulation cylinder to simulate the bolt tightening force required when the valve body is loaded.

[0014] As a further optimized scheme of the present application, the upper end of the valve body product is provided with a detachable transmission member, one end of the transmission member extends downward into the driving hole of the valve body product and is engaged with the input end of the gear pump, and the other end of the transmission member extends upward and is keyed connected with the test shaft.

[0015] As a further optimized scheme of the present application, the lifting assembly includes a fixed plate installed at the upper end of the test chamber, a lifting cylinder for driving the lifting of the upper oil passage block assembly is installed on the fixed plate, a plurality of sleeves are uniformly distributed around the lifting cylinder and are installed on the fixed plate, an active rod is slidably sleeved in each sleeve, one end of the active rod extends above the fixed plate and is provided with a stop block for preventing disengagement, and the other end of the active rod extends below the fixed plate and is fixed with the upper oil passage block assembly.

[0016] As a further optimized scheme of the present application, the upper end of the lower oil passage block has a test oil port corresponding to and matched with the lower end 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, and the lower oil passage block is driven by the lower oil passage block lifting assembly to move upward and be positioned in the lower end of the valve body product.

[0017] As a further optimized scheme of the present application, the oil outlet block lifting assembly comprises lifting cylinders, cantilever arms, a bearing plate, a bearing table and fixing columns, the lifting cylinders and the fixing columns are symmetrically installed on both sides of the upper end of the base plate, the cantilever arms are installed on the upward movable ends of the lifting cylinders, the bearing plate is arranged between the lifting cylinders and the fixing columns, one end of the bearing plate is fixed with the free end of the cantilever arm through a connecting rod, the other end of the bearing plate extends horizontally and is slidably assembled with the sliding grooves of the inner side walls of the fixing columns, and the bearing table is installed on the bearing plate, and the upper end surface of the bearing table serves as the mounting bearing surface of the oil outlet block.

[0018] As a further optimized scheme of the present application, the two ends of the bearing table extend to the outside of the two sides of the bearing plate and are symmetrically arranged, and a supporting assembly for supporting the lower parts of the two ends of the bearing table is further installed on the base plate, and when the bearing table drives the oil outlet block to move upward and abuts against the lower end of the valve body product, the movable end of the supporting assembly moves to the lower ends of the two ends of the bearing table to provide auxiliary support.

[0019] As a further optimized scheme of the present application, the tray lifting mechanism comprises two tray lifting units symmetrically arranged below the test station, each tray lifting unit comprises a positioning cylinder, a movable plate and positioning rods, the positioning cylinder is installed on the base plate and located below the oil outlet block, the movable plate is installed on the movable end of the positioning cylinder and is lifted and lowered by the positioning cylinder, the number of the positioning rods is two and they are symmetrically arranged at the two ends of the movable plate, one end of each positioning rod extends vertically upward and is higher than the initial position of the movable end of the oil outlet block lifting assembly, the four positioning rods are arranged in a rectangular array and correspond to the four tray positioning holes of the product tray, and the upper end of each positioning rod is inserted and positioned with the adjacent tray positioning hole.

[0020] As a further optimized scheme of the present application, the middle part of the product tray is provided with a through hole for abutting the oil outlet block with the lower end oil port of the valve body product, the oil outlet block is provided with a positioning hole for interference fit with the valve body positioning ring, which can prevent the valve body from shaking, a socket is installed on the product tray and integrated with the traveling test wire harness on the product tray, and a power supply assembly is installed on the base plate and inserted with the socket to supply power to the test wire harness.

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

[0022] S1, assembling the valve body product to the product tray at the loading station, and installing a transmission member in the driving hole of the valve body product, and conveying the product tray and the valve body product thereon to the test station in the test chamber by a conveying mechanism;

[0023] S2, driving the movable plate and the positioning rods to rise by the positioning cylinder, so that the upper ends of the four positioning rods are respectively inserted and positioned with the adjacent tray positioning holes at the lower end of the product tray;

[0024] S3 drives the cantilever, the bearing plate and the bearing table to rise through the lifting cylinder, so that the bearing table drives the lower oil passage block to move up, and the test oil port at the upper end of the lower oil passage block is connected with the lower end oil port of the valve body product;

[0025] S4 drives the sliding table to move downwards along the guide rail through the translation cylinder, so that the upper ends of the four supporting columns respectively support the four points at the lower end of the bearing table;

[0026] S5 drives the upper oil passage block to descend through the lifting cylinder, so that the test shaft is connected with the transmission member through the key, and then the downward extension of the bolt simulation cylinder is simulated through the bolt, so that the multiple bolt simulation cylinders are respectively pressed against the corresponding bolt holes, and the bolt pretightening force required when the valve body is loaded is simulated;

[0027] S6 opens test mode one: other oil passages are closed, only the valve body inlet and outlet are reserved, at this time, the test shaft is driven to rotate through the motor, so that the gear pump in the valve body product is driven to rotate through the transmission member, so as to test the gear pump torque, inlet flow, outlet flow and inlet and outlet flow difference of the valve body under different rotating speeds;

[0028] S7 opens test mode two: the outlet is closed, only the valve body inlet and other test oil ports are reserved, at this time, the oil delivery pressure is set at the inlet of the valve body, and the other test oil port flow of the valve body under different oil delivery pressures and different rotating speeds is tested;

[0029] S8 opens test mode three: the outlet is closed, only the valve body inlet and other test oil ports are reserved, at the same time, the plug is inserted with the socket through the pushing cylinder, and power is supplied to the valve body experimental wire harness, at this time, the oil delivery pressure is set at the inlet of the valve body, and the C1 port pressure of the valve body under different oil delivery pressures and different rotating speeds is tested.

[0030] The transmission assembly valve body test equipment and test method provided by the application have the following beneficial effects:

[0031] (1) Integrated test platform, realizing one-stop detection of multiple parameters

[0032] Through the combined design of the upper and lower docking mechanisms on the tray in the test bin, comprehensive tests of rotating speed / torque, flow and pressure can be completed at the same station, the motor-driven test shaft of the upper oil passage block assembly simulates different working condition rotating speeds, and the pressure is adjusted in cooperation with the hydraulic oil supply system, so that the gear pump torque, oil port flow and pressure data can be synchronously obtained. The design shortens the single valve body test time from 40 minutes to 15 minutes, improves the efficiency by 167%, and avoids the cumulative error caused by multiple clamping;

[0033] (2) Simulate loading conditions to improve test authenticity and reliability

[0034] The bolt simulation cylinder applies a 50-300N pre-tightening force to the upper end of the valve body product through the movable end, accurately restores the bolt locking state during loading, and when testing a certain type of valve, the simulation cylinder applies a 200N pre-tightening force, which is consistent with the actual assembly conditions, solving the problem of misjudgment of sealing performance caused by the lack of pre-tightening force in traditional testing, and improving the sealing test pass rate from 82% to 98%. At the same time, the transmission member is connected to the test shaft and the gear pump through the spline, and the torque transmission is without slip, ensuring the authenticity and effectiveness of the test data of rotation speed / torque;

[0035] (Three) Automatic positioning and docking, reducing manual intervention

[0036] The tray lifting mechanism is inserted into the positioning hole of the product tray through four positioning rods, with a positioning accuracy of ±0.1mm. The lifting assembly and the lower oil passage block lifting assembly drive the upper and lower oil passage blocks to automatically dock the oil ports. The whole process does not require manual adjustment. The conveying mechanism automatically sends the valve body into the test chamber and automatically sends it out after the test is completed, greatly reducing labor costs and material losses.

[0037] (Four) Multi-mode test switching, covering all functional detection requirements

[0038] The valve body performance is verified through three test modes: mode one tests the gear pump meshing and the smoothness of the oil inlet and outlet ports, mode two detects the flow distribution of the motor shaft and differential lubricating oil holes, and mode three tests the C1 port pressure controlled by the electromagnetic valve through the energized assembly. This design covers all key parameter detection required for valve body production, improves the adaptability of traditional single-function equipment by 80%, and completes the whole process test without replacing the equipment;

[0039] (Five) Stable support and precise guidance, ensuring the accuracy of high-pressure testing

[0040] During high-pressure testing, the support assembly forms four-point support on the bearing table (74) through the translation cylinder driving the support column, with a bearing capacity of 500kg and a deformation of the bearing table ≤0.01mm, and the test data fluctuation amplitude ≤1%. The movable rod of the lifting assembly cooperates with the sleeve to ensure the smooth lifting of the upper oil passage block and the bump-free docking of the oil port, further improving the stability of the test data.

[0041] (Six) Modular design and convenient maintenance, reducing use cost

[0042] The core components such as the upper and lower oil passage blocks adopt standardized interfaces, and the replacement of adapters for different types of valves only takes 10 minutes. The hydraulic oil supply system is independently laid out, which is convenient for maintenance and pressure calibration. The annual maintenance cost of the equipment is reduced by 60% compared with traditional multiple equipment combination. The test wire harness follows the product tray, reducing wiring loss and prolonging 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 middle and lower oil passage block.

[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 application are described below by way of example with reference to the accompanying drawings, in which like or similar elements are designated by like or similar symbols throughout the drawings. The embodiments described below are exemplary only, and are not to be construed as limiting the present application.

[0053] In the present application, unless explicitly specified and limited, a first feature is "on" or "under" a second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature is "over", "above" and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or only means that the first feature is higher in horizontal height than the second feature. The first feature is "under", "below" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or only means that the first feature is lower in horizontal height than the second feature.

[0054] Please refer to Figures 1-7 A valve body test equipment of a transmission assembly, comprising a test bin 1 and a conveying mechanism 2, the product tray 3 loaded with valve body products 20 is conveyed to the test station in the test bin 1 for oil supply simulation test through the conveying mechanism 2, and the test station in the test bin 1 is provided with an upper tray docking mechanism and a lower tray docking mechanism distributed upward and downward;

[0055] The upper tray docking mechanism comprises an upper oil passage block assembly 4 matched with the upper end oil port of the valve body product 20, and the upper oil passage block assembly 4 is adjusted in height by a lifting assembly 5 to dock with the upper end oil port of the valve body product 20, and to perform comprehensive test of speed / torque, flow and pressure;

[0056] The lower tray docking mechanism comprises a lower oil passage block 6 matched with the lower end oil port of the valve body product 20, and the lower oil passage block 6 is adjusted in height by a lower oil passage block lifting assembly 7 to dock with the lower end oil port of the valve body product 20;

[0057] A bottom plate 8 is further installed at the lower end of the test station, and a tray lifting mechanism for positioning the valve body product 20 is installed on the bottom plate 8;

[0058] A hydraulic oil supply system 22 is further installed at the rear of the test bin 1, and the upper tray docking mechanism and the lower tray docking mechanism are supplied with oil through the hydraulic oil supply system 22, the hydraulic oil supply system 22 comprises a variable pump, a pressure sensor and a flow valve, can provide 0-3MPa adjustable pressure oil, meet the oil supply demand of different test modes, the system response time is ≤50ms, can quickly switch the oil path state, and complete multi-mode test in cooperation with the upper and lower oil passage blocks;

[0059] The device realizes "one clamping, multiple parameter testing" through integrated design. The conveying mechanism 2 automatically sends the product tray 3 into the test bin 1. The tray lifting mechanism realizes accurate positioning of the valve body product 20. The upper and lower oil passage blocks are respectively connected to the upper and lower oil ports of the valve body. In cooperation with the hydraulic oil supply system 22, the rotation speed / torque, flow rate, and pressure tests can be completed simultaneously. The single test time is shortened from 40 minutes to 15 minutes, and the efficiency is improved by 167%.

[0060] Specifically, as shown in Figure 6 The upper oil passage block assembly 4 includes an upper oil passage block 41 that is lifted with the movable end of the lifting assembly 5. The upper end of the upper oil passage block 41 is provided 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 provided with a test shaft 43 extending below 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 is also provided with a liftable bolt simulation cylinder 44. The bolt simulation cylinder 44 is pressed against the upper end of the valve body product 20 to simulate the bolt tightening force required when the valve body is loaded. The number of bolt simulation cylinders 44 is consistent with the number of assembly bolt holes and corresponds to them;

[0061] The motor 42 is a servo motor with a power of 2kW and a rotation speed of 0-3000r / min. The torque is transmitted through the test shaft 43. The measurement range is 0-50N·m, and the accuracy is ±0.1N·m. The bolt simulation cylinder 44 can apply a pre-tightening force of 50-300N to accurately restore the bolt locking state when the valve body is loaded. This solves the problem of false judgment of sealing performance caused by the lack of pre-tightening force in traditional testing, and improves the sealing test pass rate from 82% to 98%.

[0062] Further, as shown in Figure 3 and Figure 6 The upper end of the valve body product 20 is provided with a detachable transmission member 21. One end of the transmission member 21 extends downward into the drive hole of the valve body product 20 and is engaged with the input end of the gear pump. The other end of the transmission member 21 extends upward and is keyed to the test shaft 43.

[0063] The transmission member 21 is connected by involute spline, with a key groove tolerance of H7 / g6, to ensure that the torque transmission is not slippery. The detachable design allows the transmission member 21 to be quickly replaced according to different valve body models, and to adapt to various gear pump input specifications.

[0064] Specifically, as shown in Figure 6As shown, the lifting assembly 5 includes a fixed plate 51 mounted on the upper end of the test chamber 1, a lifting cylinder 52 for driving the upper oil passage block assembly 4 to lift is mounted on the fixed plate 51, and a plurality of sleeves 53 uniformly distributed circumferentially along the lifting cylinder 52 are also mounted on the fixed plate 51. The inside of each sleeve 53 is slidably sleeved with a movable rod 54, one end of the movable rod 54 extends above the fixed plate 51 and is provided with a stop block for preventing falling off, and the other end of the movable rod 54 extends below the fixed plate 51 and is fixed with the upper oil passage block assembly 4.

[0065] The lifting cylinder 52 has a stroke of 100 mm, the driving speed of the upper oil passage block assembly 4 is 50 mm / s, the cooperation of the four movable rods 54 and the sleeves 53 ensures stable lifting and avoids knocking the oil port during docking, and the stop block prevents the movable rod 54 from falling off, thereby improving the safety of the equipment.

[0066] Specifically, as shown in Figure 4 The upper end of the lower oil passage block 6 has a test oil port corresponding to and adapted to the lower end oil port of the valve body product 20, the lower oil passage block 6 is mounted on the movable end of the lower oil passage block lifting assembly 7, and the lower oil passage block 6 is driven by the lower oil passage block lifting assembly 7 to move upward and be positioned in docking with the lower end of the valve body product 20;

[0067] The test oil port is sealed by an O-ring and is in docking with the lower end oil port of the valve body, ensuring no leakage during testing, the lifting precision of the lower oil passage block lifting assembly 7 is ±0.05 mm, ensuring the alignment of the oil ports and avoiding testing errors caused by misalignment.

[0068] Specifically, as shown in Figure 4 and Figure 5 The lower oil passage block lifting assembly 7 includes a lifting cylinder 71, a cantilever 72, a bearing plate 73, a bearing table 74, and a fixed column 75, the lifting cylinder 71 and the fixed column 75 are symmetrically mounted on the upper end of the bottom plate 8, the cantilever 72 is mounted on the upward movable end of the lifting cylinder 71, the bearing plate 73 is arranged between the lifting cylinder 71 and the fixed column 75, one end of the bearing plate 73 is fixed with 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 sliding groove of the inner side wall of the fixed column 75, the bearing table 74 is mounted on the bearing plate 73, and the upper end surface of the bearing table 74 serves as the mounting bearing surface of the lower oil passage block 6;

[0069] The lifting cylinder 71 provides sufficient lifting force, the cooperation of the bearing plate 73 and the sliding groove of the fixed column 75 limits the lateral displacement, ensuring the vertical lifting of the lower oil passage block 6, and the bearing table 74 is made of cast iron with a flatness of ≤0.03 mm, ensuring the smooth installation of the lower oil passage block 6.

[0070] Further, as shown in Figure 4As shown, the two ends of the bearing table 74 extend to the outside of the two sides of the bearing plate 73 and are symmetrically arranged, and the bottom plate 8 is also provided with a support assembly for supporting the lower part of the two ends of the bearing table 74. When the bearing table 74 drives the lower oil passage block 6 to move upwards and is connected with the lower end of the valve body product 20, the movable end of the support assembly moves to the lower end of the bearing table 74 to provide auxiliary support;

[0071] The support assembly includes support units symmetrically distributed on the outer sides of the two ends of the bearing table 74. Each support unit includes a guide rail 12, a sliding table 13, a translation cylinder 14, and a support column 15. The sliding table 13 is slidingly assembled with the upper end surface of the bottom plate 8 through the symmetrically distributed guide rails 12, and the sliding table 13 is arranged beside the bearing table 74 and adjusts the horizontal distance between the two by being driven by the translation cylinder 14. The support column 15 is symmetrically distributed on both sides of the upper end surface of the sliding table 13, and the sliding table 13 and the support column 15 are driven by the translation cylinder 14 to move to the lower side of the bearing table 74, so that the upper end of the support column 15 supports the lower end of the bearing table 74 in four points.

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

[0073] Specifically, as shown in Figure 4 and Figure 5 The tray lifting mechanism includes two tray lifting units symmetrically distributed below the test station. Each tray lifting unit includes a positioning cylinder 9, a movable plate 10, and a positioning rod 11. The positioning cylinder 9 is installed on the bottom plate 8 and located below the lower oil passage block 6. The movable plate 10 is installed on the movable end of the positioning cylinder 9 and is lifted by the positioning cylinder 9. The positioning rod 11 is symmetrically distributed on both ends of the movable plate 10, and 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 passage block lifting assembly 7. The four positioning rods 11 are arranged in a rectangular array and correspond to the four tray positioning holes of the product tray 3. The upper end of the positioning rod 11 is inserted and positioned with the adjacent tray positioning hole. The two sides of the bearing plate 73 are provided with movable grooves matched with the positioning rods 11, so that the bearing plate 73 can be slidingly matched with the four positioning rods 11.

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

[0075] Specifically, as shown inFigures 3-5 The middle part of the product tray 3 is provided with a through hole for the lower oil passage block 6 to be connected with the lower end oil port of the valve body product 20, the lower oil passage block 6 is provided with a positioning hole for interference fit with the positioning ring of the valve body, which can prevent the valve body from shaking, the socket 19 is installed on the product tray 3, and the socket 19 is integrated with the test wire harness on the product tray 3, the power supply assembly is plugged into the socket 19 and installed on the bottom plate 8, the test wire harness moves with the tray to avoid wiring entanglement;

[0076] Further, as shown in Figure 4 and Figure 5 The power supply assembly includes a stand 16 installed on the upper end of the bottom plate 8, a plug 17 and a push cylinder 18 are installed on the upper end of the stand 16, the plug 17 is matched with and corresponds to the socket 19, and the plug 17 is plugged into the socket 19 to supply power through the push cylinder 18;

[0077] The push cylinder 18 drives the plug 17 to be plugged into the socket 19, and the contact resistance is less than or equal to 0.1Ω, which ensures stable power supply of the electromagnetic valve, and the voltage fluctuation is less than or equal to ±0.5V.

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

[0079] S1: Assemble the valve body product 20 to the product tray 3 in the loading station, and install the transmission member 21 in the driving hole of the valve body product 20, and then transport the product tray 3 and the valve body product 20 thereon to the test station in the test chamber 1 through the conveying mechanism 2;

[0080] S2: Drive the movable plate 10 and the positioning rods 11 to rise through the positioning cylinder 9, so that the upper ends of the four positioning rods 11 are respectively plugged into and positioned with the tray positioning holes adjacent to the lower end of the product tray 3;

[0081] S3: Drive the cantilever 72, the bearing plate 73, and the bearing table 74 to rise through the lifting cylinder 71, so that the bearing table 74 drives the lower oil passage block 6 to move upward, and the test oil port at the upper end of the lower oil passage block 6 is connected with the lower end oil port of the valve body product 20;

[0082] S4: Drive the sliding table 13 to move along the guide rail 12 to the lower side of the bearing table 74 through the translation cylinder 14, so that the upper ends of the four supporting columns 15 respectively support the four points at the lower end of the bearing table 74;

[0083] S5: Drive the upper oil passage block 41 to descend through the lifting cylinder 52, so that the test shaft 43 is connected with the transmission member 21 through a key, and then the downward extension of the movable end of the bolt simulation cylinder 44 is simulated through a bolt, so that the plurality of bolt simulation cylinders 44 respectively press the corresponding bolt holes, and the bolt pretightening force required when the valve body is loaded is simulated;

[0084] S6: open test mode one: close other oil paths, only keep valve body inlet and outlet, at this time, rotate the test shaft 43 by the motor 42 to drive the gear pump in the valve body product 20, so as to test the gear pump torque, inlet flow, outlet flow and the difference between inlet and outlet flow of the valve body at different rotating speeds, in this mode, mainly test the meshing of the gear pump, the flow passage of the inlet / outlet, and the sealing effect of the valve body at this time;

[0085] S7: open test mode two: close the outlet, only keep the valve body inlet and other test oil ports, at this time, set the oil delivery pressure at the inlet of the valve body, test the other test oil port flow of the valve body at different oil delivery pressures and different rotating speeds, in this mode, mainly test the flow passage of the other test oil port;

[0086] S8: open test mode three: close the outlet, only keep the valve body inlet and other test oil ports, at the same time, plug the plug 17 with the socket 19 by the push cylinder 18 to supply power to the valve body experimental harness, at this time, set the oil delivery pressure at the inlet of the valve body, test the C1 port pressure of the valve body at different oil delivery pressures and different rotating speeds, in this mode, mainly test the operation of the electromagnetic valve connected by the experimental harness, and test the sealing effect of the valve body;

[0087] It should be noted that the other test oil ports include: motor shaft lubricating oil hole, differential lubricating oil hole, input shaft lubricating oil hole, intermediate shaft lubricating oil hole, and transmission cooling oil hole.

[0088] In summary, the method realizes multi-mode testing through an automatic process: mode one drives the gear pump by the motor to test the torque, flow and difference at different rotating speeds, mode two closes the outlet to detect the flow distribution of the motor shaft, differential and other lubricating oil holes, and mode three tests the C1 port pressure controlled by the electromagnetic valve through the power supply assembly, the whole process does not require manual intervention, covers the full function test requirements of the valve body, automatically stores the test data and generates a report, and reduces 80% of the labor cost compared with the traditional method.

[0089] The above is only the preferred specific implementation of the present application, but the protection scope of the present application is not limited thereto, any skilled person in the art can make equivalent replacement or change according to the technical solution and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A transmission assembly valve body testing device, comprising a testing bin (1) and a conveying mechanism (2), through which a product tray (3) loaded with valve body products (20) is conveyed to a testing station in the testing bin (1) for oil supply simulation testing, and the testing station in the testing bin (1) is provided with an upper tray butt joint mechanism and a lower tray butt joint mechanism arranged in an upper and lower distribution manner, characterized in that: the upper tray butt joint mechanism comprises an upper oil passage block assembly (4) matched with the upper end oil port of the valve body product (20), and the upper oil passage block assembly (4) is adjusted in height by a lifting assembly (5) to butt joint with the upper end oil port of the valve body product (20) and conduct comprehensive testing of the rotation speed / torque, flow and pressure; the lower tray butt joint mechanism comprises a lower oil passage block (6) matched with the lower end oil port of the valve body product (20), and the lower oil passage block (6) is adjusted in height by a lower oil passage block lifting assembly (7) to butt joint with the lower end oil port of the valve body product (20); and a bottom plate (8) is further installed at the lower end of the testing station, and the bottom plate (8) is provided with a tray lifting mechanism for positioning the valve body product (20). The upper oil passage block assembly (4) comprises an upper oil passage block (41) which is lifted with the movable end of the lifting assembly (5), the upper end of the upper oil passage block (41) is provided 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 provided with a test shaft (43) extending below the upper oil passage block (41), the test shaft (43) transmits torque to the gear pump, and the lower end of the upper oil passage block (41) is further provided with a liftable bolt simulation cylinder (44) for simulating the bolt tightening force required when the valve body is loaded by pressing the upper end of the valve body product (20) through the movable end of the bolt simulation cylinder (44). The upper end of the valve body product (20) is provided with a detachable transmission member (21), one end of the transmission member (21) extends downward into the driving hole of the valve body product (20) and is engaged with the input end of the gear pump, and the other end of the transmission member (21) extends upward and is keyed connected with the test shaft (43). The lifting assembly (5) comprises a fixed plate (51) installed at the upper end of the testing bin (1), the fixed plate (51) is provided with a lifting cylinder (52) for driving the upper oil passage block assembly (4) to lift, and the fixed plate (51) is further provided with a plurality of sleeves (53) uniformly distributed in the circumferential direction of the lifting cylinder (52), the inside of each sleeve (53) is slidably sleeved with a movable rod (54), one end of the movable rod (54) extends above the fixed plate (51) and is provided with a stop block for preventing disengagement, and the other end of the movable rod (54) extends below the fixed plate (51) and is fixed with the upper oil passage block assembly (4).

2. A transmission assembly valve body test apparatus according to claim 1, wherein, The upper end of the lower oil passage block (6) is provided with a test oil port corresponding to and matched with the lower end 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), and the lower oil passage block (6) is driven by the lower oil passage block lifting assembly (7) to move upward and butt joint and position with the lower end of the valve body product (20).

3. A transmission assembly valve body test apparatus according to claim 2, wherein, ​ 4. A transmission assembly valve body test apparatus as described in claim 1, wherein, ​ 5. A transmission assembly valve body testing apparatus as described in claim 1, wherein, ​ 6. A transmission assembly valve body test apparatus as described in claim 1 wherein, The lower oil passage block lifting assembly (7) comprises lifting cylinders (71), cantilever arms (72), bearing plates (73), bearing tables (74) and fixed columns (75), the lifting cylinders (71) and the fixed columns (75) are symmetrically installed on both sides of the upper end of the bottom plate (8), the cantilever arms (72) are installed on the upward movable ends of the lifting cylinders (71), the bearing plates (73) are arranged between the lifting cylinders (71) and the fixed columns (75), one end of the bearing plate (73) is fixed with the free end of the cantilever arm (72) through a connecting rod, the other end of the bearing plate (73) extends horizontally and is slidably assembled with the sliding grooves of the inner side walls of the fixed columns (75), the bearing tables (74) are installed on the bearing plates (73), and the upper end faces of the bearing tables (74) serve as the mounting bearing faces of the lower oil passage blocks (6).

7. A transmission assembly valve body test apparatus according to claim 6, wherein, The two ends of the bearing tables (74) extend to the outside of both sides of the bearing plates (73) and are symmetrically arranged, and the bottom plate (8) is further provided with a supporting assembly for supporting the lower parts of the two ends of the bearing tables (74), when the bearing tables (74) drive the lower oil passage blocks (6) to move upwards and are connected with the lower ends of the valve body products (20), the movable ends of the supporting assembly move to the lower ends of the bearing tables (74) to provide auxiliary support.

8. A transmission assembly valve body test apparatus as described in claim 1 wherein, The tray lifting mechanism comprises two tray lifting units symmetrically arranged below the test stations, each tray lifting unit comprises a positioning cylinder (9), a movable plate (10) and a positioning rod (11), the positioning cylinder (9) is installed on the bottom plate (8) and located below the lower oil passage 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), the positioning rods (11) are two in number and symmetrically arranged at the two ends of the movable plate (10), one end of the positioning rod (11) away from the movable plate (10) extends vertically upwards and is higher than the initial position of the movable end of the lower oil passage block lifting assembly (7), the four positioning rods (11) are arranged in a rectangular array and correspond to the four tray positioning holes of the product tray (3), and the upper end of the positioning rod (11) is inserted and positioned with the adjacent tray positioning hole.

9. A transmission assembly valve body test apparatus as described in claim 1 wherein, The middle part of the product tray (3) is provided with a through hole for connecting the lower oil passage block (6) with the lower end oil port of the valve body product (20), the lower oil passage block (6) is provided with a positioning hole in interference fit with the valve body positioning ring, the product tray (3) is provided with a socket (19), and the socket (19) is integrated with the accompanying test wire harness on the product tray (3), and the bottom plate (8) is provided with a power supply assembly inserted with the socket (19), and the test wire harness is supplied with power through the power supply assembly.

10. A method of testing a transmission assembly valve body, characterized by, The specific steps are as follows: S1, assembling the valve body product (20) to the product tray (3) at the feeding station, and installing the transmission member (21) in the driving hole of the valve body product (20), conveying the product tray (3) and the valve body product (20) thereon to the test station in the test cabin (1) through the conveying mechanism (2); S2, driving the movable plate (10) and the positioning rod (11) to rise through the positioning cylinder (9), so that the upper ends of the four positioning rods (11) are respectively inserted and positioned with the adjacent tray positioning holes at the lower end of the product tray (3); S3 drives the cantilever (72), the bearing plate (73), and the bearing table (74) to rise through the lifting cylinder (71), so that the bearing table (74) drives the lower oil passage block (6) to move upwards, and the test oil port at the upper end of the lower oil passage block (6) is connected with the lower end oil port of the valve body product (20); S4 drives the sliding table (13) to move downwards along the guide rail (12) through the translation cylinder (14), so that the upper ends of the four supporting columns (15) respectively support the four points at the lower end of the bearing table (74); S5 drives the upper oil passage block (41) to descend through the lifting cylinder (52), so that the test shaft (43) is connected with the transmission member (21), and then the downward extension of the movable end of the bolt simulation cylinder (44) is realized, so that the plurality of bolt simulation cylinders (44) respectively press the corresponding bolt holes, and the bolt pretightening force required when the valve body is loaded is simulated; S6 opens test mode one: close other oil passages, only keep the valve body inlet and outlet, at this time, drive the test shaft (43) to rotate through the motor (42), so that the transmission member (21) drives the gear pump in the valve body product (20) to rotate, so as to test the gear pump torque, inlet flow, outlet flow and inlet and outlet flow difference of the valve body under different rotating speeds; S7 opens test mode two: close the outlet, only keep the valve body inlet and other test ports, at this time, set the oil delivery pressure at the inlet of the valve body, test the other test port flow of the valve body under different oil delivery pressures and different rotating speeds; S8 opens test mode three: close the outlet, only keep the valve body inlet and other test ports, at the same time, drive the plug (17) to plug with the socket (19) through the pushing cylinder (18), and supply power to the valve body experimental wire harness, at this time, set the oil delivery pressure at the inlet of the valve body, test the C1 port pressure of the valve body under different oil delivery pressures and different rotating speeds.

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