An accuracy detection device for processing of an automobile pressure sensor

Abstract

The application provides a precision detection device for automobile pressure sensor processing, and belongs to the technical field of sensor detection. The device comprises a bearing box, a rack fixed on the bearing box, a support plate fixed on the bearing box, a rotating shaft rotatably connected to the support plate through a bearing, a test pressure box fixed at one end of the rotating shaft, an oscillating mechanism arranged on the bearing box and matched with the test pressure box, the oscillating mechanism being used to drive the test pressure box to reciprocate, a plurality of pressure sensor bodies arranged on the test pressure box, a test mechanism arranged on the bearing box, and the test mechanism being used to measure the pressure of the pressure sensor bodies. The test mechanism can accurately increase or decrease the pressure of the oil in the test pressure box, ensure the accuracy and reliability of the test results of the pressure sensor bodies, improve the precision of simulating the actual working conditions, and make the test more close to the real working conditions.

Description

Technical Field

[0001] This invention relates to the field of sensor detection technology, and in particular to a precision detection device for the processing of automotive pressure sensors. Background Technology

[0002] The most sophisticated component in a car is the transmission, and the most sophisticated component within the transmission is the valve body, which is the core of controlling gear shifting. Hidden inside the valve body are multiple pressure sensors that constantly sense changes in oil pressure to ensure accurate judgments. However, if a pressure sensor malfunctions, the transmission will be severely affected. Traditional methods for testing pressure sensors typically involve using a multimeter to check for short circuits and static voltage inside the sensor, but this method cannot measure voltage values ​​under different pressures.

[0003] The core of automotive pressure sensor testing devices is the comparison method, combined with working condition simulation, to complete the accuracy assessment. Currently, pressure sensor testing devices test pressure sensors separately for different working conditions. This testing method not only leads to low work efficiency, but also makes it difficult to accurately simulate the real working environment of the sensor, thus affecting the accuracy of the final test results. Summary of the Invention

[0004] This invention addresses the shortcomings of existing technologies by providing a precision testing device for automotive pressure sensor processing. Through a testing mechanism, the oil in the pressure test chamber can be precisely pressurized or depressurized to ensure the accuracy and reliability of the pressure sensor body test results. This improves the accuracy of simulating its actual working conditions and makes the test more closely resemble real working conditions.

[0005] To address the aforementioned technical problems, the present invention provides a solution to the problem that individually testing pressure sensors under different working conditions is not only inefficient but also fails to accurately simulate the actual working environment of the sensors, thus affecting the accuracy of the test results.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: An accuracy testing device for automotive pressure sensor processing includes a carrier box and a frame fixed on the carrier box, a support plate fixed on the carrier box, and a rotating shaft rotatably connected to the support plate via a bearing. A test pressure box is fixed to one end of the rotating shaft, and a swing mechanism adapted to the test pressure box is provided on the carrier box. The swing mechanism is used to drive the test pressure box to swing back and forth, and a plurality of pressure sensor bodies are provided on the test pressure box. A testing mechanism is provided on the carrier box for measuring the pressure of the pressure sensor bodies.

[0007] Preferably, the swing mechanism includes: a support frame fixed on the carrier box, and a housing fixed on the support frame; a rotating shaft rotatably connected to the housing; a first transmission shaft rotatably connected to the housing; a first worm gear fixed on the first transmission shaft; a second transmission shaft rotatably connected to the housing; a first worm gear meshing with the first worm gear fixed on the second transmission shaft; a swing wheel fixed on the rotating shaft; a connecting rod hinged between the first worm gear and the swing wheel; a servo motor fixed on the housing; the output shaft of the servo motor coaxially fixed with the second transmission shaft; and a side cover fixed on the housing.

[0008] Preferably, the testing mechanism includes: a mounting frame fixed inside the pressure test chamber, and a heat-conducting plate fixed on the mounting frame, a heating tube fixed on the heat-conducting plate, and a plurality of heat-conducting sheets fixed on the heat-conducting plate; a cover plate fixed on the pressure test chamber; and a pressurizing component provided on the carrier box for pressurizing the oil in the pressure test chamber; and an oil supply component provided on the carrier box for supplying oil to the pressurizing component.

[0009] Preferably, the pressurizing assembly includes: a frame fixed inside a bearing box; a cylinder is fixed on the frame; a sealing plug is slidably connected inside the cylinder via at least two guide plates; a through hole is provided on the cylinder, and a screw slides through the through hole; one end of the screw is rotatably connected to the sealing plug; a bracket is fixed on the cylinder; a shaft is rotatably connected to the bracket; a drive motor is fixed on the cylinder via a mounting plate; the output shaft of the drive motor is coaxially fixed with the shaft; a worm gear is fixed on the shaft; a threaded sleeve that is threadedly connected to the screw is rotatably connected to the bracket; a worm wheel adapted to the worm gear is tightly fitted onto the threaded sleeve; an oil inlet valve communicating with the interior is fixed on the pressure test box; and an oil filling pipe is fixed between the cylinder and the oil inlet valve.

[0010] Preferably, the oil supply assembly includes: a cylinder two fixed on a frame, and a pump body one located on one side of the cylinder two fixed on the frame; an oil supply pipe one fixed between the input end of the pump body one and the cylinder two; an oil supply pipe two fixed between the output end of the pump body one and the cylinder one; a one-way valve provided on the oil supply pipe two; an oil injection pipe connected to the interior fixed on the cylinder two; the oil injection pipe extending to the outside of the bearing box; a pump body two fixed on the bearing box; a pipe body jointly fixed between the output end of the pump body two and the cylinder two; an oil outlet valve fixed on the pressure test box; and an oil suction pipe jointly fixed between the input end of the pump body two and the oil outlet valve.

[0011] Preferably, the pressure test chamber has several threaded grooves that communicate with the interior, and the pressure sensor body is threadedly connected to the threaded grooves.

[0012] Preferably, a display screen and a controller are fixed on the frame, and the controller is electrically connected to the display screen. The servo motor, drive motor, pump body one, and pump body two are all electrically connected to the controller.

[0013] Preferably, two guide rods are fixed between the cylinder and the inner wall of the bearing box, and a connecting plate slides through the guide rod. One end of the screw passes through the connecting plate, and a positioning ring that abuts against the connecting plate is fixed on the screw.

[0014] Preferably, a guide plate is fixed inside the housing, and a storage box is fixed on the guide plate, the storage box being located directly below the worm gear.

[0015] Preferably, a support plate is fixed on one of the support plates, and the oil filling pipe and the oil sucking pipe are fixed to the support plate.

[0016] Compared with the prior art, the present invention has the following beneficial effects: This invention provides a precision testing device for automotive pressure sensor processing. By setting up a swing mechanism, the pressure test chamber can be effectively driven to achieve a reciprocating swing operation. This reciprocating swing operation can more accurately and realistically simulate the actual working situation when the car encounters bumps during driving, and the corresponding changes in the oil accordingly. By simulating this real working condition, the accuracy of testing the pressure sensor body can be further improved, thereby ensuring the reliability and accuracy of the test results and providing a strong guarantee for the smooth progress of related work.

[0017] This invention provides a precision testing device for automotive pressure sensor processing. Through the setting of the testing mechanism, it can not only achieve precise pressurization or depressurization of the oil inside the pressure test chamber, thereby effectively ensuring the accuracy and reliability of the results obtained by the pressure sensor body during the testing process, but also further improve the accuracy of simulating the actual working conditions of the pressure sensor body by heating the oil. This makes the entire testing process closer to the operating environment of the pressure sensor under real working conditions, thus providing a strong guarantee for obtaining more accurate and more valuable test data. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a side view of the structure of the present invention; Figure 3 This is a schematic diagram of the rear view structure of the present invention; Figure 4 This is a schematic diagram of the swing mechanism structure of the present invention; Figure 5 for Figure 4 Enlarged schematic diagram of the structure at point A in the middle; Figure 6 This is a side sectional view of the pressure test chamber of the present invention; Figure 7 This is a schematic diagram of the testing mechanism structure of the present invention; Figure 8 for Figure 7 Enlarged schematic diagram of the structure at point B; Figure 9 This is a schematic diagram of the pressurization component structure of the present invention; Figure 10 This is a schematic diagram of the oil supply assembly structure of the present invention; Figure 11 for Figure 10 Enlarged schematic diagram of the structure at point C; Figure 12 This is a schematic diagram of a side section of the cylinder of the present invention; Figure 13 for Figure 12 Enlarged schematic diagram of the structure at point D; Figure 14 This is a side sectional view of the connecting plate structure of the present invention; Figure 15 for Figure 14 Enlarged schematic diagram of the structure at point E in the middle.

[0019] Drawing Nomenclature: 1. Carrier box; 2. Frame; 3. Support plate; 4. Rotating shaft; 5. Pressure test chamber; 6. Swing mechanism; 7. Pressure sensor body; 8. Testing mechanism; 9. Support frame; 10. Housing; 11. Drive shaft one; 12. Worm gear one; 13. Drive shaft two; 14. Worm gear one; 15. Swing wheel; 16. Connecting rod; 17. Servo motor; 18. Side cover; 19. Mounting frame; 20. Heat-conducting plate; 21. Heating tube; 22. Heat-conducting sheet; 23. Cover plate; 24. Pressurization assembly; 25. Oil supply assembly; 26. Frame; 27. Cylinder one; 28. Guide plate; 29. ​​Seal 30. Plug; 31. Through hole; 32. Screw; 33. Bracket; 34. Shaft; 35. Drive motor; 36. Threaded sleeve; 37. Oil inlet valve; 38. Oil filling pipe; 39. Second cylinder; 40. First pump body; 41. First oil supply pipe; 42. Second oil supply pipe; 43. Check valve; 44. Oil injection pipe; 45. Pipe body; 46. Oil outlet valve; 47. Oil suction pipe; 48. Threaded groove; 49. Display screen; 50. Controller; 51. Guide rod; 52. Connecting plate; 53. Positioning ring; 54. Guide plate; 55. Storage box; 56. Support plate; 57. Second worm gear; 58. Second worm wheel. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings.

[0021] The following description is intended to disclose the invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious modifications will be apparent to those skilled in the art. The basic principles of the invention defined in the following description can be used in other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the invention.

[0022] Those skilled in the art should understand that, in the disclosure of this invention, the terms "longitudinal," "lateral," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or position based on the orientation or positional relationship shown in the accompanying drawings. They are merely simplified descriptions for the convenience of describing this invention and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this invention.

[0023] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0024] Example 1: Please refer to Figure 1 - Figure 15 A precision testing device for automotive pressure sensor processing includes a carrier box 1 and a frame 2 fixed on the carrier box 1. It also includes a support plate 3 fixed on the carrier box 1, with a rotating shaft 4 rotatably connected to the support plate 3 via bearings. A test pressure box 5 is fixed to one end of the rotating shaft 4. A swing mechanism 6 adapted to the test pressure box 5 is provided on the carrier box 1. The swing mechanism 6 drives the test pressure box 5 to swing back and forth, and a plurality of pressure sensor bodies 7 are provided on the test pressure box 5. Finally, a testing mechanism 8 is provided on the carrier box 1 for measuring the pressure of the pressure sensor bodies 7. The pressure test chamber 5 has several threaded grooves 48 that are connected to the interior, and the pressure sensor body 7 is threadedly connected to the threaded grooves 48. The threaded grooves 48 make it easier for staff to install the pressure sensor on the pressure test chamber 5 for testing, which is more in line with the actual installation conditions. It should be noted that the pressure sensor body 7 is mainly used to monitor the hydraulic pressure inside the transmission in real time. It is the key to achieving smooth shifting, pressure control, and fault diagnosis, so as to achieve precise control of oil pressure. This is a standard setting in this field, so it will not be described in detail here.

[0025] Furthermore, the testing mechanism 8 includes: a mounting frame 19 fixed inside the pressure test chamber 5, and a heat-conducting plate 20 fixed on the mounting frame 19, a heating tube 21 fixed on the heat-conducting plate 20, and a plurality of heat-conducting sheets 22 fixed on the heat-conducting plate 20; a cover plate 23 fixed on the pressure test chamber 5; and a pressurizing component 24 provided on the bearing box 1, which is used to pressurize the oil in the pressure test chamber 5; and an oil supply component 25 provided on the bearing box 1, which supplies oil to the pressurizing component 24. It should be noted that by setting up the testing mechanism 8, the working temperature of the pressure sensor body 7 under actual working conditions can be effectively simulated. By heating the oil to the preset temperature, the temperature environment of the pressure sensor body 7 during actual operation can be accurately simulated, achieving temperature control at normal and high temperatures, and effectively cooperating with oil pressure testing. The pressurizing assembly 24 includes: a frame 26 fixed inside the bearing box 1; a cylinder 27 fixed on the frame 26; a sealing plug 29 slidably connected inside the cylinder 27 via at least two guide plates 28; a through hole 30 on the cylinder 27; a screw 31 slidably passing through the through hole 30; one end of the screw 31 rotatably connected to the sealing plug 29; a bracket 32 ​​fixed on the cylinder 27; a shaft 33 rotatably connected to the bracket 32; a drive motor 34 fixed on the cylinder 27 via a mounting plate; the output shaft of the drive motor 34 coaxially fixed with the shaft 33; a worm gear 57 fixed on the shaft 33; and a screw threadedly connected to the screw 31 rotatably connected to the bracket 32. The threaded sleeve 35 is fastened to the threaded sleeve 35, and the worm gear 58 adapted to the worm gear 57 is fastened to the threaded sleeve 35. The oil inlet valve 36 connected to the inside is fixed on the rod test box 5. The oil filling pipe 37 is fixed between the cylinder 27 and the oil inlet valve 36. Two guide rods 51 are fixed between the cylinder 27 and the inner wall of the bearing box 1. The connecting plate 52 slides through the guide rod 51. One end of the screw 31 passes through the connecting plate 52. The positioning ring 53 that abuts against the connecting plate 52 is fixed on the screw 31, which plays a guiding role for the screw 31 and ensures that the screw 31 maintains relative stability during the movement, and avoids the screw 31 from getting stuck during the spiral movement. In addition, the oil supply assembly 25 includes: a second cylinder 38 fixed on the frame 26, and a first pump 39 fixed on the frame 26 located on one side of the second cylinder 38. An oil supply pipe 40 is fixed between the input end of the first pump 39 and the second cylinder 38, and an oil supply pipe 41 is fixed between the output end of the first pump 39 and the first cylinder 27. A one-way valve 42 is provided on the second oil supply pipe 41, and an oil injection pipe 43 connected to the interior is fixed on the second cylinder 38. The oil injection pipe 43 extends to the outside of the bearing box 1, and a second pump 44 is fixed on the bearing box 1. A pipe 45 is fixed between the output end of the second pump 44 and the second cylinder 38, and an oil outlet valve 46 is fixed on the pressure test box 5. An oil extraction pipe 47 is fixed between the input end of the second pump 44 and the oil outlet valve 46. One of the support plates 3 is fixed with a support plate 56. The oil filling pipe 37 and the oil sucking pipe 47 are fixed to the support plate 56. The support plate 56 provides support for the oil filling pipe 37 and the oil sucking pipe 47. The end of the oil sucking pipe 47 and the oil filling pipe 37 near the pressure test chamber 5 is made of soft material, so that it can deform according to the swing of the pressure test chamber 5. It should be noted that by setting up the testing mechanism 8, not only can the precise pressurization or depressurization of the oil inside the pressure test chamber 5 be achieved, thereby effectively ensuring the accuracy and reliability of the results obtained by the pressure sensor body 7 during the test, but also the accuracy of simulating the actual working conditions of the pressure sensor body 7 can be further improved by heating the oil. This makes the entire testing process closer to the operating environment of the pressure sensor under real working conditions, thus providing a strong guarantee for obtaining more accurate and more valuable test data. It should also be noted that the oil draining operation in the pressure test chamber 5 is carried out by the pump body 2 44, which draws the oil in the pressure test chamber 5 into the cylinder body 2 38, ensuring that the oil enters the cylinder for storage, thereby achieving the purpose of oil recycling and effectively reducing the waste of oil in the testing work. When new oil needs to be added for use, use a pump to connect to the filling pipe to extract the old oil and add new oil into the cylinder 38 through the filling pipe 43. In this scheme, the oil in the test chamber 5 is evacuated by the pump body 44. Driven by the drive motor 34, the shaft 33 rotates synchronously, which drives the worm gear 57 to rotate synchronously. Utilizing the meshing transmission between the worm gear 57 and the worm wheel 58, the threaded sleeve 35 is rotated under force. Utilizing the threaded transmission between the threaded sleeve 35 and the screw 31, the screw 31 moves forward spirally after being stressed, which in turn drives the sealing plug 29 to move, thereby pressurizing the cylinder 27 and the oil in the test chamber 5. The heating pipe 21 heats the oil in the test chamber 5 until the preset temperature is reached, and the test data is compared and analyzed with the test data of the standard parts.

[0026] Example 2: Please refer to Figure 1 - Figure 5 This embodiment further explains the first embodiment, the difference being that it optimizes the detection environment of the pressure sensor body 7 under actual working conditions.

[0027] Specifically, the swing mechanism 6 includes: a support frame 9 fixed on the bearing box 1, and a housing 10 fixed on the support frame 9; a rotating shaft 4 rotatably connected to the housing 10; a transmission shaft 11 rotatably connected to the housing 10; a worm gear 12 fixed on the transmission shaft 11; a transmission shaft 2 rotatably connected to the housing 10; a worm gear 14 meshing with the worm gear 12 fixed on the transmission shaft 2 13; a swing wheel 15 fixed on the rotating shaft 4; a connecting rod 16 hinged between the worm gear 12 and the swing wheel 15; a servo motor 17 fixed on the housing 10; and the output shaft of the servo motor 17 coaxially fixed with the transmission shaft 2 13; and a side cover 18 fixed on the housing 10. The frame 2 is fixed with a display screen 49 and a controller 50, and the controller 50 is electrically connected to the display screen 49. The servo motor 17, drive motor 34, pump body 1 39 and pump body 2 44 are all electrically connected to the controller 50. The detection operation is simple and reduces the skill requirements of personnel. All detection parameters and running instructions are set through the human-machine interface of the display screen 49. The operator only needs to complete the loading, unloading and program start operation. The housing 10 has a guide plate 54 fixed inside, and a storage box 55 is fixed on the guide plate 54. The storage box 55 is located directly below the worm gear 14. The storage box 55 is designed to facilitate the collection of excess oil when adding lubricating oil for component maintenance, thereby reducing lubricating oil contamination. It should be noted that by setting up the swing mechanism 6, the pressure test chamber 5 can be effectively driven to achieve the reciprocating swing operation process. Such reciprocating swing operation can more accurately and realistically simulate the actual working situation when the oil changes accordingly when the car encounters bumps during driving. By simulating this real working condition, the accuracy of the pressure sensor body 7 can be further improved, thereby ensuring the reliability and accuracy of the test results and providing a strong guarantee for the smooth progress of related work. It should also be noted that when maintaining the swing mechanism 6 components, once the side cover 18 is removed, the maintenance work on the swing mechanism 6 components can be carried out very intuitively and conveniently. There is no need for complicated operating procedures. Removing the side cover 18 exposes the swing mechanism 6 components completely, making it easier and more convenient to perform cleaning, lubrication or other necessary maintenance operations, which greatly improves the efficiency and quality of maintenance work. In this scheme, the principle of using the swing mechanism 6 to drive the test chamber 5 to swing back and forth is as follows: the servo motor 17 drives the transmission shaft 13 to rotate synchronously, which drives the worm gear 14 to rotate synchronously. By utilizing the meshing transmission between the worm gear 14 and the worm wheel 12, and the transmission effect of the connecting rod 16, the swing wheel 15 is driven to swing back and forth along the axis, which in turn drives the rotating shaft 4 to rotate back and forth, so that the test chamber 5 swings back and forth.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0029] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A precision testing device for processing automotive pressure sensors, comprising a carrier box (1) and a frame (2) fixed on the carrier box (1); Its features are, Also includes: A support plate (3) is fixed on the carrier box (1), and a rotating shaft (4) is rotatably connected to the support plate (3) via a bearing. One end of the rotating shaft (4) is fixed to a test pressure box (5), and a swing mechanism (6) adapted to the test pressure box (5) is provided on the carrier box (1). The swing mechanism (6) is used to drive the test pressure box (5) to swing back and forth, and a number of pressure sensor bodies (7) are provided on the test pressure box (5); and, A test mechanism (8) is set on the carrier box (1) for measuring the pressure of the pressure sensor body (7). The test mechanism (8) includes: a mounting frame (19) fixed inside the test chamber (5), and a heat-conducting plate (20) fixed on the mounting frame (19), a heating tube (21) fixed on the heat-conducting plate (20), and several heat-conducting sheets (22) fixed on the heat-conducting plate (20); a cover plate (23) fixed on the test chamber (5); and a pressurizing component (24) is set on the carrier box (1) for pressurizing the oil in the test chamber (5). An oil supply component (25) is set on the carrier box (1) for supplying oil to the pressurizing component (24). The swing mechanism (6) includes: a support frame (9) fixed on the bearing box (1), and a housing (10) fixed on the support frame (9); a rotating shaft (4) rotatably connected to the housing (10); a transmission shaft (11) rotatably connected to the housing (10); a worm gear (12) fixed on the transmission shaft (11); a transmission shaft (13) rotatably connected to the housing (10); a worm (14) meshing with the worm gear (12) fixed on the transmission shaft (13); a swing wheel (15) fixed on the rotating shaft (4); a connecting rod (16) hinged between the worm gear (12) and the swing wheel (15); a servo motor (17) fixed on the housing (10); and the output shaft of the servo motor (17) coaxially fixed with the transmission shaft (13); and a side cover (18) fixed on the housing (10).

2. The accuracy detection device for automotive pressure sensor processing according to claim 1, characterized in that, The pressurizing assembly (24) includes: a frame (26) fixed inside the bearing box (1), a cylinder (27) fixed on the frame (26), and a sealing plug (29) slidably connected inside the cylinder (27) via at least two guide plates (28). A through hole (30) is provided on the cylinder (27), and a screw (31) slidably passes through the through hole (30). One end of the screw (31) is rotatably connected to the sealing plug (29). A bracket (32) is fixed on the cylinder (27), and a shaft (33) is rotatably connected to the bracket (32). A drive motor (34) is fixed on the first (27) by a mounting plate, and the output shaft of the drive motor (34) is fixed coaxially with the shaft body (33). A worm gear (57) is fixed on the shaft body (33). A threaded sleeve (35) that is threadedly connected to the screw (31) is rotatably connected on the bracket (32). A worm wheel (58) that is adapted to the worm gear (57) is fastened on the threaded sleeve (35). An oil inlet valve (36) that communicates with the inside is fixed on the test pressure box (5). An oil filling pipe (37) is fixed between the first cylinder (27) and the oil inlet valve (36).

3. The accuracy detection device for automotive pressure sensor processing according to claim 2, characterized in that, The oil supply assembly (25) includes: a second cylinder (38) fixed on a frame (26), and a first pump (39) located on one side of the second cylinder (38) fixed on the frame (26). An oil supply pipe (40) is fixed between the input end of the first pump (39) and the second cylinder (38), and an oil supply pipe (41) is fixed between the output end of the first pump (39) and the first cylinder (27). A one-way valve (42) is provided on the second oil supply pipe (41). An oil injection pipe (43) connected to the interior is fixed on the second cylinder (38). The oil injection pipe (43) extends to the outside of the bearing box (1). A second pump body (44) is fixed on the bearing box (1). A pipe body (45) is fixed between the output end of the second pump body (44) and the second cylinder (38). An oil outlet valve (46) is fixed on the pressure test box (5). An oil extraction pipe (47) is fixed between the input end of the second pump body (44) and the oil outlet valve (46).

4. The accuracy detection device for automotive pressure sensor processing according to claim 1, characterized in that, The pressure test chamber (5) has several threaded grooves (48) that are connected to the interior, and the pressure sensor body (7) is threadedly connected to the threaded grooves (48).

5. The accuracy detection device for automotive pressure sensor processing according to claim 1, characterized in that, The frame (2) is fixed with a display screen (49) and a controller (50), and the controller (50) is electrically connected to the display screen (49). The servo motor (17), drive motor (34), pump body one (39) and pump body two (44) are all electrically connected to the controller (50).

6. The accuracy detection device for automotive pressure sensor processing according to claim 2, characterized in that, Two guide rods (51) are fixed together between the inner wall of the cylinder (27) and the bearing box (1), and a connecting plate (52) slides through the guide rod (51). One end of the screw (31) passes through the connecting plate (52), and a positioning ring (53) that abuts against the connecting plate (52) is fixed on the screw (31).

7. The accuracy detection device for automotive pressure sensor processing according to claim 2, characterized in that, A guide plate (54) is fixed inside the housing (10), and a storage box (55) is fixed on the guide plate (54). The storage box (55) is located directly below the worm gear (14).

8. The accuracy detection device for automotive pressure sensor processing according to claim 2, characterized in that, One of the support plates (3) is fixed with a support plate (56), and the oil filling pipe (37) and the oil sucking pipe (47) are fixed to the support plate (56).

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