An oil pump valve plate testing device

Abstract

The application discloses an oil pump valve plate testing device, which comprises a base plate weldment, a material moving assembly, a pushing assembly and a guide assembly are arranged on the base plate weldment, an oil protection ring is arranged around the base plate weldment, and an oil return hole is arranged at the bottom of the base plate weldment; one end of the pushing assembly is connected with the material moving assembly, and the pushing assembly is used for adjusting the position of the material moving assembly; a slidable sliding plate assembly is arranged on the guide assembly, a torque instrument and an NVH vibration sensor are installed on the sliding plate assembly, a spline anti-collision assembly is installed at the bottom of the sliding plate assembly, and the torque instrument is connected with external splines on the oil pump valve plate through the spline anti-collision assembly; the NVH vibration sensor is used for monitoring the data of the rotation of the oil pump on the oil pump valve plate; a spraying assembly is arranged on the guide assembly, the spraying assembly is located below the spline anti-collision assembly, and the spraying assembly is used for cleaning the oil pump valve plate. The oil pump valve plate can be automatically connected and centered, manual interference factors can be reduced, the accuracy and consistency of production data are improved, and the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oil pump testing, in particular to an oil pump valve plate testing device. BACKGROUND

[0002] The existing hydraulic valve plate of a new energy vehicle, especially a hybrid vehicle, is provided with a mechanical oil pump. The oil pump is driven to rotate by a motor on the vehicle to provide corresponding hydraulic pressure for the vehicle to complete gear shifting, clutching and other functions. Before leaving the factory, the oil pump needs to be driven to rotate in a certain way for testing to detect whether its performance meets the technical requirements.

[0003] In the current valve plate production and testing process, due to the convex-concave structure of the spline, the conventional operation is to manually install, center and manually fix the spline with bolts, and then drive the mechanical oil pump to rotate by a motor to complete the detection. In the actual operation process, the detection data is inconsistent due to the influence of human factors, such as installation offset, installation bias and tightening force of the fixing bolt. In addition, the spline of the hydraulic valve plate is manually clamped, which is low in efficiency and high in labor intensity, and is not conducive to continuous and batch production. SUMMARY

[0004] The present application provides an oil pump valve plate testing device to solve the problems existing in the prior art.

[0005] To achieve the above-mentioned purpose, the present application provides an oil pump valve plate testing device, which comprises a base plate weldment, a material moving assembly, a pushing assembly and a guide assembly are arranged on the base plate weldment, an oil protection ring is arranged around the base plate weldment, and an oil return hole is arranged at the bottom of the base plate weldment; one end of the pushing assembly is connected with the material moving assembly, and the pushing assembly is used for adjusting the position of the material moving assembly; a slidable sliding plate assembly is arranged on the guide assembly, a torque instrument and an NVH vibration sensor are installed on the sliding plate assembly, a spline anti-collision assembly is installed at the bottom of the sliding plate assembly, and the torque instrument is connected with the external spline on the oil pump valve plate through the spline anti-collision assembly; the NVH vibration sensor is used for monitoring the data of the rotation of the oil pump on the oil pump valve plate; a spraying assembly is arranged on the guide assembly, the spraying assembly is located below the spline anti-collision assembly, and the spraying assembly is used for cleaning the oil pump valve plate.

[0006] Preferably, the guide assembly comprises a sliding plate guide column fixedly installed on the base plate weldment, a top plate is fixedly connected to the top end of the sliding plate guide column, a pressing mechanism is installed on the top plate, the pressing mechanism is connected with a floating joint on the sliding plate assembly through a guide rod, and the spraying assembly is installed on the sliding plate guide column.

[0007] Preferably, the spraying assembly comprises two sliding clamps, the two sliding clamps are sleeved on the two slide plate guide columns respectively, and a spraying fixing plate is fixedly installed between the two sliding clamps; a sliding bearing is installed on the spraying fixing plate, a spraying guide rod is installed in the sliding bearing, a nozzle block is fixedly installed at one end of the spraying guide rod, and a nozzle is installed on the nozzle block; the spraying guide rod is of a hollow structure, and a hydraulic connector is installed at the other end of the spraying guide rod; a pushing assembly is fixedly installed on the spraying fixing plate, and an output end of the pushing assembly is fixedly connected with the nozzle block.

[0008] Preferably, the material moving assembly comprises a conveying guide rail, the conveying guide rail is installed on the table plate welding part; a material moving bottom plate is slidingly installed on the conveying guide rail, an automatic pressing head is arranged on the material moving bottom plate, the automatic pressing head comprises an oil way block and a plurality of non-standard hydraulic pressing heads arranged on the oil way block; the oil way block is internally provided with an oil groove channel, the oil way block controls the extension and retraction of the non-standard hydraulic pressing heads through a switching valve group; a test oil basin and a fixing pin are arranged on the oil way block, the fixing pin is used for guiding and positioning the oil pump valve plate; an oil discharge valve and an oil inlet valve are arranged at the bottom end of the test oil basin, a liquid level instrument and a temperature measuring instrument are installed on the test oil basin, the liquid level instrument is used for monitoring the liquid level in the test oil basin, and the temperature measuring instrument is used for monitoring the temperature in the test oil basin.

[0009] Preferably, the slide plate assembly comprises a sliding upper bottom plate, the sliding upper bottom plate is slidingly installed on the slide plate guide column, and the pressing mechanism is connected with the sliding upper bottom plate through a guide rod and a floating joint.

[0010] A lower supporting column is installed at the bottom end of the sliding upper bottom plate, a sliding lower bottom plate is slidingly installed on the lower supporting column, a torque instrument seat plate is installed on the sliding lower bottom plate, and a torque instrument is fixed to the torque instrument seat plate; a rotary motor is fixedly installed on the sliding upper bottom plate, an output shaft of the rotary motor penetrates through the sliding upper bottom plate and is in transmission connection with the torque instrument through an upper coupling; the spline anti-collision assembly is installed on the sliding lower bottom plate, and the torque instrument is in transmission connection with the spline anti-collision assembly through a lower coupling.

[0011] Preferably, a guide column is installed on the sliding lower bottom plate, a step is arranged on the guide column, and the guide column is used for guiding and positioning the sliding upper bottom plate; a tool block is fixedly installed at the bottom end of the sliding lower bottom plate, and the tool block is used for contacting the oil pump valve plate; an oil way channel is arranged in the tool block, the oil way channel is used for connecting with a channel of the oil pump valve plate, and the tool block is used for installing an NVH vibration sensor, a pressure sensor or a flow sensor for detection.

[0012] Preferably, the spline anti-collision assembly comprises a conversion shaft, a bearing is fixedly sleeved on the conversion shaft, a bearing sleeve is rotatably connected to the conversion shaft through the bearing, the top of the conversion shaft is in transmission connection with the lower shaft coupling, the outer side of the bottom of the conversion shaft is sequentially sleeved with a spline sleeve and a spline shaft clasp ring, the spline sleeve is in sliding fit with the conversion shaft, the spline shaft clasp ring is fixedly connected with the conversion shaft, the bottom of the spline shaft clasp ring is provided with a boss, the spline sleeve is in limit fit with the spline shaft clasp ring through the boss, a spring is arranged between the spline shaft clasp ring and the conversion shaft, the top end of the spring is in contact with the stop table of the conversion shaft, and the bottom end of the spring is in contact with the stop table of the spline sleeve, the bottom end of the conversion shaft is provided with external splines, the spline sleeve is provided with internal splines, and the conversion shaft and the spline sleeve are in transmission fit through the internal splines and the external splines, and the spline sleeve is provided with internal splines, and the internal splines of the spline sleeve are matched with external splines on the oil pump valve plate.

[0013] Preferably, the bottom of the bearing sleeve is fixedly connected with a detection switch seat, and the detection switch seat is installed with a proximity detector.

[0014] Compared with the prior art, the oil pump valve plate testing device has the following advantages and technical effects:

[0015] The oil pump valve plate testing device provided by the application can realize automatic connection, automatic locking, full-automatic performance and NVH vibration testing, improve production efficiency, reduce artificial interference factors, improve the accuracy and consistency of production data, reduce production time and save production cost. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings in the following description only constitute some embodiments of the application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0017] Figure 1 It is a structural schematic view of the oil pump valve plate testing device of the application.

[0018] Figure 2 It is a structural schematic view of the guiding assembly of the application.

[0019] Figure 3 It is a structural schematic view of the spraying assembly of the application.

[0020] Figure 4 It is a structural schematic view of the material moving assembly of the application.

[0021] Figure 5 It is a structural schematic view of the sliding plate assembly of the application.

[0022] Figure 6 The structure diagram of the spline anti-collision assembly of the application is shown in the figure;

[0023] In the figure: 1, base plate welding part; 2, pushing assembly; 3, oil shield; 4, oil return hole; 5, torque instrument; 6, NVH vibration sensor; 7, slide plate guide column; 8, top plate; 9, pressing mechanism; 10, slide clasp; 11, spraying fixing plate; 12, spraying guide rod; 13, nozzle block; 14, nozzle; 15, hydraulic joint; 17, conveying guide rail; 18, material moving bottom plate; 19, oil way block; 20, non-standard hydraulic pressure head; 21, test oil basin; 22, oil discharge valve; 23, oil inlet valve; 24, liquid level instrument; 25, temperature measuring instrument; 26, slide upper bottom plate; 27, lower support column; 28, slide lower bottom plate; 29, torque instrument seat plate; 30, rotary motor; 31, upper coupling; 32, lower coupling; 33, guide column; 34, tool block; 35, conversion shaft; 36, bearing sleeve; 37, spline shaft sleeve; 38, spline shaft clasp; 39, spring; 40, detection switch seat; 41, proximity detector. DETAILED DESCRIPTION

[0024] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The described embodiments are only part of the embodiments of the present application, not all. All other embodiments obtained by a person of ordinary skill in the art without creative labor belong to the scope of protection of the present application. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0025] As Figures 1 to 6 shown, the present application provides an oil pump valve plate testing device, which comprises a base plate welding part 1, the base plate welding part 1 is provided with a material moving assembly, a pushing assembly 2 and a guide assembly, the periphery of the base plate welding part 1 is provided with an oil shield 3, and the bottom of the base plate welding part 1 is provided with an oil return hole 4; one end of the pushing assembly 2 is connected with the material moving assembly, and the pushing assembly 2 is used for adjusting the position of the material moving assembly; the guide assembly is provided with a slidable slide plate assembly, the slide plate assembly is installed with a torque instrument 5 and an NVH vibration sensor 6, the bottom of the slide plate assembly is installed with a spline anti-collision assembly, and the torque instrument 5 is connected with the external spline on the oil pump valve plate through the spline anti-collision assembly; the NVH vibration sensor 6 is used for monitoring the noise, vibration, sound roughness and other data generated when the oil pump rotates on the oil pump valve plate; the guide assembly is provided with a spraying assembly, the spraying assembly is located below the spline anti-collision assembly, and the spraying assembly is used for cleaning the oil pump valve plate.

[0026] The oil pump valve plate is placed on the material moving assembly, and the product is transported to the test position by the pushing assembly 2 and fixed, the guide assembly is used to automatically center and combine the rotating motor 30 and the spline anti-collision assembly on the slide plate assembly with the spline shaft of the oil pump valve plate, so that the automatic clamping of the oil pump valve plate is realized. When the rotating motor 30 receives the instruction after being powered, the rotating motor 30 drives the oil pump to rotate through the shaft coupling and the torque instrument 5, so that the rotation test of the oil pump and the data acquisition of the torque, hydraulic parameter and NVH are realized.

[0027] Further optimization scheme, the guide assembly includes a slide plate guide column 7 fixedly installed on the table plate weldment 1, the top end of the slide plate guide column 7 is fixedly connected with a top plate 8, the top plate 8 is installed with a pressing mechanism 9, the pressing mechanism 9 is connected with a floating joint on the slide plate assembly through a guide rod; the spraying assembly is installed on the slide plate guide column 7.

[0028] Further optimization scheme, the spraying assembly includes two sliding clamps 10, the two sliding clamps 10 are respectively sleeved on the two slide plate guide columns 7, and a spraying fixing plate 11 is fixedly installed between the two sliding clamps 10; the spraying fixing plate 11 is installed with a sliding bearing, the spraying guide rod 12 is installed in the sliding bearing, one end of the spraying guide rod 12 is fixedly installed with a nozzle block 13, and the nozzle block 13 is installed with a nozzle 14; the spraying guide rod 12 is of a hollow structure, and the other end of the spraying guide rod 12 is installed with a hydraulic joint 15; the spraying fixing plate 11 is fixedly installed with the pushing assembly 2, and the output end of the pushing assembly 2 is fixedly connected with the nozzle block 13.

[0029] Further optimization scheme, the material moving assembly includes a conveying guide rail 17, and the conveying guide rail 17 is installed on the table plate weldment 1; a material moving bottom plate 18 is slidably installed on the conveying guide rail 17, and an automatic pressing head is arranged on the material moving bottom plate 18; the automatic pressing head includes an oil passage block 19 and a plurality of non-standard hydraulic pressing heads 20 arranged on the oil passage block 19; the oil passage block 19 has an oil groove channel inside, and the oil passage block 19 controls the extension and retraction of the non-standard hydraulic pressing heads 20 through a switching valve group; the oil passage block 19 is provided with a test oil basin 21 and a fixing pin, and the fixing pin is used for guiding and positioning the oil pump valve plate; the bottom end of the test oil basin 21 is provided with an oil discharge valve 22 and an oil inlet valve 23, and the test oil basin 21 is installed with a liquid level instrument 24 and a temperature measuring instrument 25; the liquid level instrument 24 is used for monitoring the liquid level in the test oil basin 21, and the temperature measuring instrument 25 is used for monitoring the temperature in the test oil basin 21.

[0030] Further optimization scheme, the slide plate assembly includes a sliding upper bottom plate 26, the sliding upper bottom plate 26 is slidably installed on the slide plate guide column 7, and the pressing mechanism 9 is connected with the sliding upper bottom plate 26 through a guide rod and a floating joint;

[0031] The bottom end of the sliding upper bottom plate 26 is provided with a lower supporting column 27, the lower supporting column 27 is provided with a sliding lower bottom plate 28, the sliding lower bottom plate 28 is provided with a torque instrument seat plate 29, and the torque instrument 5 is fixed to the torque instrument seat plate 29; the sliding upper bottom plate 26 is provided with a rotating motor 30, the output shaft of the rotating motor 30 penetrates the sliding upper bottom plate 26 and is connected with the torque instrument 5 through an upper coupling 31; the spline anti-collision assembly is arranged on the sliding lower bottom plate 28, and the torque instrument 5 is connected with the spline anti-collision assembly through a lower coupling 32.

[0032] Further optimization scheme, the sliding lower bottom plate 28 is provided with a guide column 33, the guide column 33 is provided with a step, and the guide column 33 is used for guiding and positioning the sliding upper bottom plate 26; the bottom end of the sliding lower bottom plate 28 is provided with a tool block 34, and the tool block 34 is used for contacting with the oil pump valve plate; the inside of the tool block 34 is provided with an oil passage, the oil passage is used for connecting with the passage of the oil pump valve plate, and the tool block 34 is used for installing the NVH vibration sensor 6, the pressure sensor or the flow sensor for detection.

[0033] Further optimization scheme, the spline anti-collision assembly comprises a conversion shaft 35, the conversion shaft 35 is provided with a bearing, the conversion shaft 35 is rotatably connected with a bearing sleeve 36 through the bearing, and the top of the conversion shaft 35 is connected with the lower coupling 32; the bottom outer side of the conversion shaft 35 is sequentially provided with a spline shaft sleeve 37 and a spline shaft snap ring 38, the spline shaft sleeve 37 is in sliding fit with the conversion shaft 35, the spline shaft snap ring 38 is fixedly connected with the conversion shaft 35, the bottom of the spline shaft snap ring 38 is provided with a boss, the spline shaft sleeve 37 is limitedly matched with the spline shaft snap ring 38 through the boss; the spring 39 is arranged between the spline shaft snap ring 38 and the conversion shaft 35, the top end of the spring 39 is in contact with the stop table of the conversion shaft 35, and the bottom end of the spring 39 is in contact with the stop table of the spline shaft sleeve 37; the bottom end of the conversion shaft 35 is provided with an external spline, the spline shaft sleeve 37 is provided with an internal spline, and the conversion shaft 35 is in transmission fit with the spline shaft sleeve 37 through the internal spline and the external spline; the spline shaft sleeve 37 is provided with an internal spline, and the internal spline of the spline shaft sleeve 37 is matched with the external spline on the oil pump valve plate.

[0034] Further optimization scheme, the bottom of the bearing sleeve 36 is fixedly connected with a detection switch seat 40, and the detection switch seat 40 is provided with a proximity detector 41.

[0035] The oil pump valve plate testing device provided by the application, the pushing assembly 2 can push the material moving bottom plate 18 to move forward and backward, and the equipment and personnel are in a safe state when exiting the testing position. Personnel can take and place materials, protecting the safety of personnel and preventing the equipment from malfunctioning to injure people. The automatic pressing head is located on the material moving bottom plate 18, and the automatic pressing head comprises an oil passage block 19 and a plurality of non-standard hydraulic pressing heads 20. The oil passage block 19 has an oil groove channel inside, and the extension and compression of the non-standard hydraulic pressing heads 20 are realized through the switching function of the switching valve group. A test oil basin 21 is located on the oil passage block 19 of the automatic pressing head. The test oil basin 21 is provided with an oil discharge valve 22 and an oil inlet valve 23 at the bottom end, and the oil discharge can be automatically discharged and filled according to the program logic.

[0036] The sliding upper bottom plate 26 is provided with a linear bearing or a guide sleeve, so as to cooperate with the slide guide column 7 and be movable up and down. The lower end of the sliding upper bottom plate 26 is provided with a lower support column 27, and the lower support column 27 is fixed in cooperation with the sliding lower bottom plate 28. The sliding lower bottom plate 28 is provided with a guide column 33, the front end of the guide column 33 is provided with a round corner guide, and the tail end of the guide column 33 is provided with a step. When the slide assembly moves downward, the guide column 33 matches the lower guide hole to play a guiding and positioning function, and the step at the upper end of the guide column 33 can be limited to make the size consistent each time.

[0037] When the slide assembly moves downward, the spline shaft sleeve 37 moves downward together, the inner spline of the spline shaft sleeve 37 matches the outer spline on the oil pump valve plate, the inner spline of the spline shaft sleeve 37 is sleeved in the outer spline on the oil pump valve plate, and the matching is completed. Meanwhile, the pre-pressing force of the spring 39 makes the inner and outer splines more tightly connected.

[0038] Due to the special convex-concave structure of the spline, when the spline shaft sleeve 37 matches the spline on the oil pump valve plate, the spline shaft sleeve 37 is prevented from moving downward by the spline on the oil pump valve plate, thereby giving a counterforce to make the spline shaft sleeve 37 move upward, and the spline shaft sleeve 37 will compress the spring 39 upward. At the same time, the proximity detector 41 detects that the spline shaft sleeve 37 moves upward, and gives relevant signals to the control system. Through the control strategy, the direction and speed of the motor are controlled, thereby protecting the spline shaft sleeve 37 and increasing the success probability of spline matching.

[0039] The spraying fixed plate 11 of the spraying assembly is provided with the pushing assembly 2, the pushing assembly 2 is fixed on the spraying fixed plate 11, the front end of the pushing assembly 2 is connected with the spraying block, and the pushing assembly 2 can push the nozzle block 13 to move forward or backward. After the test is completed, the oil pump valve plate can be sprayed or blown to clean by the left and right movement of the spraying assembly, so as to remove the pollutants generated in the test process or attached before the test, thereby improving the cleanliness of the product surface.

[0040] The application can realize automatic test completion, thereby improving production efficiency, reducing interference of artificial factors, improving consistency of production data, reducing artificial work intensity, reducing production time, and saving production cost.

[0041] The above merely describes the preferred embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. An oil pump valve plate testing device characterized by, The application relates to a movable oil pump valve plate cleaning device, which comprises a base plate welding piece (1) provided with a material moving assembly, a pushing assembly (2) and a guiding assembly, an oil protection ring (3) arranged around the base plate welding piece (1), and an oil return hole (4) arranged at the bottom of the base plate welding piece (1); one end of the pushing assembly (2) is connected with the material moving assembly, and the pushing assembly (2) is used for adjusting the position of the material moving assembly; a slidable slide plate assembly is arranged on the guiding assembly, a torque instrument (5) and an NVH vibration sensor (6) are arranged on the slide plate assembly, a spline anti-collision assembly is arranged at the bottom of the slide plate assembly, the torque instrument (5) is connected with external splines on an oil pump valve plate through the spline anti-collision assembly, and the NVH vibration sensor (6) is used for monitoring the data of the rotation of the oil pump on the oil pump valve plate; a spraying assembly is arranged on the guiding assembly and located below the spline anti-collision assembly, and the spraying assembly is used for cleaning the oil pump valve plate. The guiding assembly comprises slide plate guiding columns (7) fixedly arranged on the base plate welding piece (1), top plates (8) fixedly connected with the top ends of the slide plate guiding columns (7), and pressing mechanisms (9) arranged on the top plates (8) and connected with floating joints on the slide plate assembly through guide rods; the spraying assembly is arranged on the slide plate guiding columns (7). The spraying assembly comprises two slide clamping rings (10), two slide clamping rings (10) are respectively sleeved on two slide plate guiding columns (7), and a spraying fixing plate (11) is fixedly arranged between the two slide clamping rings (10); slide bearings are arranged on the spraying fixing plate (11), spraying guide rods (12) are arranged in the slide bearings, nozzle blocks (13) are fixedly arranged at one ends of the spraying guide rods (12), nozzles (14) are arranged on the nozzle blocks (13), the spraying guide rods (12) are of a hollow structure, hydraulic joints (15) are arranged at the other ends of the spraying guide rods (12), pushing assemblies (2) are fixedly arranged on the spraying fixing plate (11), and output ends of the pushing assemblies (2) are fixedly connected with the nozzle blocks (13). The material moving assembly comprises a conveying guide rail (17) mounted on the table plate weldment (1); a material moving bottom plate (18) is slidingly mounted on the conveying guide rail (17), and an automatic pressing head is arranged on the material moving bottom plate (18); the automatic pressing head comprises an oil passage block (19) and a plurality of non-standard hydraulic pressing heads (20) arranged on the oil passage block (19); the oil passage block (19) has an oil groove channel inside, and the oil passage block (19) controls the extension and retraction of the non-standard hydraulic pressing heads (20) through a switching valve group; a test oil basin (21) and a fixing pin are arranged on the oil passage block (19), and the fixing pin is used for guiding and positioning the oil pump valve plate; an oil discharge valve (22) and an oil inlet valve (23) are arranged at the bottom end of the test oil basin (21), and a liquid level instrument (24) and a temperature measuring instrument (25) are mounted on the side wall of the test oil basin (21); the liquid level instrument (24) is used for monitoring the liquid level in the test oil basin (21), and the temperature measuring instrument (25) is used for monitoring the temperature in the test oil basin (21).

2. The oil pump valve plate testing device of claim 1, wherein, The slide plate assembly comprises a sliding upper bottom plate (26) slidingly mounted on the slide plate guide column (7), and the pressing mechanism (9) is connected with the sliding upper bottom plate (26) through a guide rod and a floating joint; A lower supporting column (27) is mounted at the bottom end of the sliding upper bottom plate (26), a sliding lower bottom plate (28) is slidingly mounted on the lower supporting column (27), a torque instrument seat plate (29) is mounted on the sliding lower bottom plate (28), and the torque instrument (5) is fixed on the torque instrument seat plate (29); a rotary motor (30) is fixedly mounted on the sliding upper bottom plate (26), the output shaft of the rotary motor (30) penetrates through the sliding upper bottom plate (26) and is in transmission connection with the torque instrument (5) through an upper coupling (31); the spline anti-collision assembly is mounted on the sliding lower bottom plate (28), and the torque instrument (5) is in transmission connection with the spline anti-collision assembly through a lower coupling (32).

3. The oil pump valve plate testing device of claim 2, wherein, A guide column (33) is mounted on the sliding lower bottom plate (28), and a step is arranged on the guide column (33); the guide column (33) is used for guiding and positioning the sliding upper bottom plate (26); a tool block (34) is fixedly mounted at the bottom end of the sliding lower bottom plate (28), and the tool block (34) is used for contacting the oil pump valve plate; an oil passage channel is arranged in the tool block (34), the oil passage channel is used for connecting with the passage of the oil pump valve plate, and the tool block (34) is used for mounting the NVH vibration sensor (6), the pressure sensor or the flow sensor for detection.

4. The oil pump valve plate testing device of claim 2, wherein, The spline anti-collision assembly comprises a conversion shaft (35), a bearing is fixedly sleeved on the conversion shaft (35), a bearing sleeve (36) is rotationally connected to the conversion shaft (35) through the bearing, and the top of the conversion shaft (35) is drivingly connected with the lower shaft coupling (32); the bottom outer side of the conversion shaft (35) is sequentially sleeved with a spline shaft sleeve (37) and a spline shaft snap ring (38), the spline shaft sleeve (37) is slidingly matched with the conversion shaft (35), the spline shaft snap ring (38) is fixedly connected with the conversion shaft (35), the bottom of the spline shaft snap ring (38) is provided with a boss, the spline shaft sleeve (37) is limitingly matched with the spline shaft snap ring (38) through the boss; a spring (39) is arranged between the spline shaft snap ring (38) and the conversion shaft (35), the top end of the spring (39) is in contact with the stop table of the conversion shaft (35), and the bottom end of the spring (39) is in contact with the stop table of the spline shaft sleeve (37); the bottom end of the conversion shaft (35) is provided with an external spline, the spline shaft sleeve (37) is provided with an internal spline, and the conversion shaft (35) is drivingly matched with the spline shaft sleeve (37) through the internal spline and the external spline; the spline shaft sleeve (37) is provided with an internal spline, and the internal spline of the spline shaft sleeve (37) is matched with an external spline on the oil pump valve plate.

5. The oil pump valve plate testing device of claim 4, wherein, The bottom of the bearing sleeve (36) is fixedly connected with a detection switch seat (40), and the detection switch seat (40) is installed with a proximity detector (41).

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