Automatic assembling and detecting system for pressure-limiting valve of oil pump

Abstract

The invention provides an automatic assembly and detection system for an oil pump pressure-limiting valve, belongs to the technical field of automobile part assembly, and aims to solve the problem of low assembly efficiency of the oil pump pressure-limiting valve. The automatic assembling and detecting system for the pressure limiting valve of the oil pump comprises a pump body positioning device, a steel ball feeding device, a steel ball mounting device, a spring feeding device, a spring sorting device, a spring detecting device and a spring mounting device. The automatic assembling and detecting system for the pressure-limiting valve of the oil pump is beneficial to simplifying the operation procedures of operators, shortening the spring detection period, improving the spring detection precision, avoiding the problems of neglected assembly and wrong assembly, and improving the assembling efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile parts assembly, and in particular relates to an automatic assembly and detection system for an oil pump pressure limiting valve. Background Art

[0002] The oil pump pressure limiting valve is mainly composed of a steel ball and a spring. At present, the assembly of the oil pump pressure limiting valve is mainly completed by manually placing the steel ball and the spring into the oil pump pressure limiting valve hole in turn. However, if the spring elastic force is unqualified, the opening pressure of the oil pump pressure limiting valve will exceed the standard, which will cause engine lubrication failure and cause unnecessary losses. Therefore, the elastic force of the spring needs to be tested before assembly. At present, the spring test is carried out by manually placing the spring in the positioning hole of the detection fixture, and then using the pressure sensor to test the elastic force of the spring. After the test is qualified, the spring is manually taken out of the positioning hole and placed in the oil pump pressure limiting valve hole. This assembly method has a long spring detection cycle, complicated operator movements, heavy load, low efficiency, and is prone to problems such as missing or wrong installation. Summary of the invention

[0003] Therefore, the technical problem to be solved by the present invention is to provide an automatic assembly and detection system for an oil pump pressure limiting valve, which can solve the problems of long spring detection cycle, complicated operator movements, heavy load, low efficiency, and easy missing and wrong installation during the assembly process of the oil pump pressure limiting valve.

[0004] In order to solve the above problems, the present invention provides an automatic assembly and detection system for an oil pump pressure limiting valve, comprising: a pump body positioning device, a steel ball feeding device, a steel ball installation device, a spring feeding device, a spring sorting device, a spring detection device and a spring installation device. The pump body positioning device is used to fix the pump body of the oil pump. The steel ball feeding device is used to provide steel balls. The steel ball installation device is used to transfer the steel balls provided by the steel ball feeding device to the top of the pump body in the pump body positioning device, and place the steel balls in the pressure limiting valve hole on the pump body. The spring feeding device is used to provide springs. The spring sorting device is used to transfer the springs provided by the spring feeding device to the spring detection device. The spring detection device is used to detect the elastic force of the spring. The spring installation device is used to transfer the springs that have passed the inspection in the spring detection device to the top of the pump body in the pump body positioning device, and place the springs in the pressure limiting valve hole.

[0005] Optionally, the pump body positioning device includes: a positioning fixture, a sealing mechanism and a detection mechanism. The positioning fixture is used to fix the pump body of the oil pump. The sealing mechanism is arranged above the positioning fixture in a manner that it can be raised or lowered. The sealing mechanism is used to clamp and seal the pressure limiting valve hole to complete the assembly of the pressure limiting valve. The detection mechanism is used to connect the pump body to detect the opening pressure of the pressure limiting valve.

[0006] Optionally, the steel ball feeding device includes: a steel ball silo and a steel ball slide. The steel ball silo includes a bottom plate, a side plate and a plurality of vertical partitions. The side plates are arranged along the edge of the bottom plate to enclose a storage bin. One side of the storage bin has an opening. The bottom plate is inclined toward the opening. A plurality of vertical partitions are arranged in sequence along the inclination direction of the bottom plate. Both sides of the vertical partition are respectively connected between the side plates located on both sides of the opening. There is a gap between the bottom of the vertical partition and the bottom plate. The steel ball slide is arranged between the opening of the steel ball silo and the pump body positioning device. The steel balls in the storage bin can, under the action of their own gravity, pass through the bottom of the plurality of vertical partitions in sequence, fall into the steel ball slide from the opening, and roll toward one end of the steel ball slide close to the pump body positioning device.

[0007] Optionally, the steel ball slideway includes: a guide groove, a lifting mechanism and a steel ball positioning mechanism. The guide groove is inclined. The guide groove includes a first end and a second end. The first end is higher than the second end, and the first end is close to the steel ball bin. A groove is provided on the side wall of the guide groove. The groove is close to the first end and corresponds to the opening. The bottom plate of the guide groove includes a first plate section and a second plate section. The first plate section is close to the first end. The first plate section can be lifted and lowered in the guide groove. The lifting mechanism is connected to the first plate section to drive the first plate section to lift and lower between a high position and a low position. When the first plate section is at a low position, the plate surface of the first plate section is lower than the plate surface of the second plate section, and the steel balls in the steel ball bin can fall onto the plate surface of the first plate section through the opening and the groove under the action of their own gravity. When the first plate section is at a high position, the plate surface of the first plate section is flush with the plate surface of the second plate section, and the plate surface of the first plate section is higher than the opening, and the steel balls on the first plate section can roll toward the second end of the guide groove through the second plate section under the action of their own gravity. The steel ball positioning mechanism includes a positioning cavity, a positioning slider and an elastic support. The positioning cavity is arranged at the second end of the guide groove. The positioning slider is arranged in the positioning cavity so as to be liftable. The elastic support is arranged in the positioning cavity and connected between the bottom of the positioning slider and the bottom plate of the positioning cavity. A first positioning groove is arranged on the top of the positioning slider. The free end of the second plate segment extends into the positioning cavity and extends into the first positioning groove. The steel ball can enter the first positioning groove along the second plate segment.

[0008] Optionally, the steel ball installation device includes: a first translation mechanism, a first lifting mechanism and a first clamping mechanism. The first translation mechanism includes a first translation cylinder and a first translation slider. The output end of the first translation cylinder is connected to the first translation slider to drive the first translation slider to move in the horizontal direction. The first lifting mechanism includes a first lifting cylinder and a connecting seat. The first lifting cylinder is arranged on the first translation slider. The output end of the first lifting cylinder is connected to the connecting seat to drive the connecting seat to rise and fall. The first clamping mechanism includes a first clamping cylinder and a pair of first clamping jaws. The first clamping cylinder is arranged on the connecting seat. The output ends of the first clamping cylinder are respectively connected to a pair of first clamping jaws. The first clamping cylinder can drive a pair of first clamping jaws to move closer to or away from each other to clamp or release the steel ball.

[0009] Optionally, the spring feeding device comprises: a vibrating feeding tray and a linear vibrator. The vibrating feeding tray is used to accommodate the spring. The vibrating feeding tray has a feeding port. The linear vibrator comprises a straight groove. One end of the straight groove is connected to the feeding port, and the other end is connected to the spring sorting device. The spring can be discharged upright from the feeding port and move forward along the straight groove to reach the spring sorting device.

[0010] Optionally, the spring picking device includes: a second lifting mechanism, a second translation mechanism, a second clamping mechanism and a spring transport mechanism. The second lifting mechanism includes a second lifting cylinder and a transition plate. The output end of the second lifting cylinder is connected to the transition plate to drive the transition plate to rise and fall. The second translation mechanism includes a second translation slide and a second translation cylinder. The second translation cylinder is arranged on the transition plate. The second translation slide is arranged on the second translation cylinder. A second translation slide is arranged on the second translation slide. The piston rod of the second translation cylinder is connected to the second translation slide to drive the second translation slide to move along the second translation slide. The second clamping mechanism includes a second clamping cylinder and a pair of second clamping jaws. The second clamping cylinder is arranged on the second translation slide. The output ends of the second clamping cylinder are respectively connected to a pair of second clamping jaws. The second clamping cylinder can drive a pair of second clamping jaws to move closer to or away from each other to clamp or release the spring. The spring transport mechanism includes a stopper, a guide block and a stopper cylinder. A second positioning groove is arranged on the stopper. The stopper is movably arranged on the guide block. The stopper cylinder is connected to the stopper to drive the stopper to move along the guide block between the origin and the end point. When the stopper is at the origin, the spring provided by the spring feeding device can enter the second positioning groove. When the stopper moves to the end point, the stopper blocks the spring feeding device, and a pair of second clamping claws can clamp the spring in the second positioning groove and transport the spring to the spring detection device.

[0011] Optionally, the spring detection device includes: a bracket, a driving assembly, a transmission mechanism and an elastic force detection mechanism. A positioning seat is provided on the bracket. The spring picking device can transfer the spring provided by the spring feeding device to the positioning seat. The driving assembly includes a servo motor and a reducer. The reducer is fixed to the bracket through the reducer seat. The output end of the servo motor is connected to the input end of the reducer. The transmission mechanism includes a linear guide, a screw and a screw seat. The linear guide is arranged on the bracket. The screw seat is movably arranged on the linear guide. The screw and the screw seat are transmitted by threaded mating. The output end of the reducer is connected to the screw through a coupling. The servo motor drives the screw to rotate through the reducer, and then drives the screw seat to move along the linear guide toward the positioning seat. The elastic force detection mechanism includes a pressure sensor and a positioning shaft. The pressure sensor is arranged on the screw seat, and the measuring end of the pressure sensor faces the positioning seat. The positioning shaft is arranged at the measuring end of the pressure sensor. When the screw seat moves along the linear guide rail toward the positioning seat, the positioning shaft can be inserted into the inner ring of the spring on the positioning seat, and the measuring end of the pressure sensor can abut against the spring to measure the elastic force of the spring.

[0012] Optionally, the spring installation device includes: a third lifting mechanism, a three-position swing mechanism, and a third clamping mechanism. The third lifting mechanism includes a third lifting cylinder and a connecting plate. The output end of the third lifting cylinder is connected to the connecting plate to drive the connecting plate to rise and fall. The three-position swing mechanism includes a swing cylinder and a swing arm. The swing cylinder is arranged on the connecting plate. One end of the swing arm is connected to the output end of the swing cylinder. The swing cylinder can drive the swing arm to rotate from the middle position to the first position or the second position. The first position and the second position are respectively located on both sides of the middle position. The third clamping mechanism includes a third clamping cylinder and a pair of third clamping jaws, and the third clamping cylinder is arranged at one end of the swing arm away from the swing cylinder. The output end of the third clamping cylinder is respectively connected to a pair of third clamping jaws. The third clamping cylinder can drive a pair of third clamping jaws to move closer or farther from each other to clamp or release the steel ball. When the swing arm rotates to the first position, the pair of third clamping jaws can clamp the spring on the spring detection device. When the swing arm rotates to the second position, the pair of third clamping jaws can transport the clamped spring to the top of the pump body in the pump body positioning device.

[0013] Optionally, the oil pump pressure limiting valve automatic assembly and detection system further includes: a pneumatic system and an electrical control system. The pneumatic system is respectively connected to the pump body positioning device, the steel ball feeding device, the steel ball installation device, the spring feeding device, the spring sorting device, the spring detection device and the spring installation device. The electrical control system is connected to the pneumatic system.

[0014] Beneficial Effects The automatic assembly and detection system of the oil pump pressure limiting valve provided by the present invention includes a pump body positioning device, a steel ball feeding device, a steel ball installation device, a spring feeding device, a spring sorting device, a spring detection device and a spring installation device. When in use, the pump body of the oil pump is fixed on the pump body positioning device; the steel ball is provided by the steel ball feeding device, and then the steel ball provided by the steel ball feeding device is transferred to the top of the pump body in the pump body positioning device through the steel ball installation device, and the steel ball is placed in the pressure limiting valve hole on the pump body. The spring is provided by the spring feeding device, and the spring provided by the spring feeding device is transferred to the spring detection device by the spring sorting device, and then the elastic force of the spring is detected by the spring detection device, and the spring that passes the detection in the spring detection device is transferred to the top of the pump body in the pump body positioning device by the spring installation device, and the spring is placed in the pressure limiting valve hole to complete the automatic assembly and detection of the steel ball and spring. The automatic assembly and detection system of the oil pump pressure limiting valve of the present invention is conducive to simplifying the operating procedures of operators, shortening the spring detection cycle, improving the spring detection accuracy, and can avoid the problems of missing and wrong installation, thereby improving the assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1A schematic structural diagram of an automatic assembly and detection system for an oil pump pressure limiting valve according to an embodiment of the present invention; Figure 2 A schematic structural diagram of a pump body positioning device according to an embodiment of the present invention; Figure 3 A schematic structural diagram of a steel ball feeding device according to an embodiment of the present invention; Figure 4 A schematic structural diagram of a steel ball installation device according to an embodiment of the present invention; Figure 5 A schematic structural diagram of a spring feeding device according to an embodiment of the present invention; Figure 6 A schematic structural diagram of a spring sorting device according to an embodiment of the present invention; Figure 7 A schematic structural diagram of a spring detection device according to an embodiment of the present invention; Figure 8 A schematic structural diagram of a spring installation device according to an embodiment of the present invention; Fig. 9 A schematic diagram of the connection relationship between a pneumatic system and an electrical control system of an embodiment provided by the present invention.

[0016] The reference numerals are as follows: 0. Pump body; 1. Pump body positioning device; 2. Steel ball feeding device; 3. Steel ball installation device; 4. Spring feeding device; 5. Spring sorting device; 6. Spring detection device; 7. Spring installation device; 8. Pneumatic system; 9. Electrical control system; 11. Positioning fixture; 12. Sealing mechanism; 111. base; 112. support block; 113. positioning claw; 114. video monitoring device; 121. fixed frame; 122. sealing cylinder; 123. guide column; 124. sealing mechanism; 21. Steel ball silo; 22. Steel ball slideway; 211, bottom plate; 212, side plate; 213, opening; 214, vertical partition; 215, storage compartment; 221. Guide groove; 222. Lifting mechanism; 223. Steel ball positioning mechanism; 224. Proximity switch; 2211, first end; 2212, second end; 2213, groove; 2214, first plate segment; 2215, second plate segment; 2221; lifting cylinder; 2222, support plate; 2231, positioning cavity; 2232, positioning slider; 2233, elastic support member; 2234, first positioning groove; 31. First translation mechanism; 32. First lifting mechanism; 33. First clamping mechanism; 311, first translation cylinder; 312, first translation slider; 321. first lifting cylinder; 322. connecting seat; 331, first clamping jaw cylinder; 332, first clamping jaw; 41. Vibrating loading tray; 42. Linear vibrator; 411, feeding port; 421, straight groove; 51. Second lifting mechanism; 52. Second translation mechanism; 53. Second clamping mechanism; 54. Spring transport mechanism; 511, second lifting cylinder; 512, transition plate; 521, second translation slide rail; 522, second translation slide block; 523, second translation cylinder; 524, piston rod; 531, second clamping jaw cylinder; 532, second clamping jaw; 541, stopper; 542, second positioning groove; 543, guide block; 544, stopper cylinder; 61. bracket; 62. driving assembly; 63. transmission mechanism; 64. elastic force detection mechanism; 611, positioning seat; 621, servo motor; 622, reducer; 623, reducer seat; 631, linear guide; 632, lead screw; 633, lead screw seat; 634, coupling; 641, pressure sensor; 642, positioning axis; 71. The third lifting mechanism; 72. The three-position swing mechanism; 73. The third clamping mechanism; 711, third lifting cylinder; 712, connecting plate; 721, swing cylinder; 722, swing arm; 731. The third clamping jaw cylinder; 732. The third clamping jaw. DETAILED DESCRIPTION

[0017] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0018] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0019] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0021] This embodiment provides an automatic assembly and detection system for an oil pump pressure limiting valve. Figure 1 A schematic structural diagram of an automatic assembly and detection system for an oil pump pressure limiting valve provided in this embodiment.

[0022] like Figure 1 As shown, the automatic assembly and detection system of the oil pump pressure limiting valve of this embodiment includes: a pump body positioning device 1, a steel ball feeding device 2, a steel ball installation device 3, a spring feeding device 4, a spring sorting device 5, a spring detection device 6 and a spring installation device 7. The pump body positioning device 1 is used to fix the pump body 0 of the oil pump. The steel ball feeding device 2 is used to provide steel balls. The steel ball installation device 3 is used to transfer the steel balls provided by the steel ball feeding device 2 to the top of the pump body 0 in the pump body positioning device 1, and place the steel balls in the pressure limiting valve hole on the pump body 0. The spring feeding device 4 is used to provide springs. The spring sorting device 5 is used to transfer the springs provided by the spring feeding device 4 to the spring detection device 6. The spring detection device 6 is used to detect the elastic force of the spring. The spring installation device 7 is used to transfer the springs that have passed the inspection in the spring detection device 6 to the top of the pump body 0 in the pump body positioning device 1, and place the springs in the pressure limiting valve hole.

[0023] like Figure 1As shown, in the automatic assembly and detection system of the oil pump pressure limiting valve of this embodiment, the pump body positioning device 1 is located on the left side of the whole system; the steel ball feeding device 2 is located at the rear side of the pump body positioning device 1; the steel ball installation device 3 is located between the steel ball feeding device 2 and the pump body positioning device 1; the spring feeding device 4 is located on the right side of the steel ball feeding device 2; the spring sorting device 5 is located at the front side of the spring feeding device 4; the spring detection device 6 is located between the spring sorting device 5 and the spring feeding device 4 and on the side close to the pump body positioning device 1; the spring installation device 7 is located between the pump body positioning device 1 and the spring detection device 6. Such an arrangement can make the structure of the automatic assembly and detection system of the oil pump pressure limiting valve more compact and reasonable, and simplify and shorten the transportation path of the steel balls and springs.

[0024] The automatic assembly and detection system of the oil pump pressure limiting valve of this embodiment includes a pump body positioning device 1, a steel ball feeding device 2, a steel ball installation device 3, a spring feeding device 4, a spring sorting device 5, a spring detection device 6 and a spring installation device 7. When in use, the pump body 0 of the oil pump is fixed on the pump body positioning device 1; the steel ball is provided by the steel ball feeding device 2, and then the steel ball provided by the steel ball feeding device 2 is transferred to the upper part of the pump body 0 in the pump body positioning device 1 through the steel ball installation device 3, and the steel ball is placed in the pressure limiting valve hole on the pump body 0. The spring is provided by the spring feeding device 4, and the spring provided by the spring feeding device 4 is transferred to the spring detection device 6 by the spring sorting device 5, and then the elastic force of the spring is detected by the spring detection device 6, and the spring that passes the detection in the spring detection device 6 is transferred to the upper part of the pump body 0 in the pump body positioning device 1 by the spring installation device 7, and the spring is placed in the pressure limiting valve hole, so as to complete the automatic assembly of the steel ball, the automatic detection and assembly of the spring. The automatic assembly and detection system of the oil pump pressure limiting valve of this embodiment is conducive to simplifying the operating procedures of operators, shortening the spring detection cycle, improving the spring detection accuracy, and can avoid the problems of missing and wrong installation, thereby improving assembly efficiency.

[0025] Figure 2 Schematic diagram of the structure of a pump body positioning device 1 provided in this embodiment. In some embodiments, Figure 2 As shown, the pump body positioning device 1 includes: a positioning fixture 11, a sealing mechanism 12 and a detection mechanism. The positioning fixture 11 is used to fix the pump body 0 of the oil pump. The sealing mechanism 12 is arranged above the positioning fixture 11 in a manner that it can be raised or lowered. The sealing mechanism 12 is used to clamp and seal the pressure limiting valve hole to complete the assembly of the pressure limiting valve. The detection mechanism is used to connect the pump body 0 in the positioning fixture 11 to detect the opening pressure of the pressure limiting valve.

[0026] In some examples, such as Figure 2As shown, the positioning fixture 11 includes a base 111, a support block 112 and a plurality of positioning claws 113. The support block 112 is arranged at the top of the base 111 for supporting the pump body 0. Each positioning claw 113 is hinged to the top of the base 111 and a plurality of positioning claws 113 are distributed around the support block 112, and the upper part of each positioning claw 113 is bent toward the side where the support block 112 is located. When the pump body 0 is placed on the support block 112 on the base 111, the upper parts of the plurality of positioning claws 113 can be clasped on the outer side of the pump body 0 to achieve the positioning of the pump body 0. This embodiment uses the support block 112 and the plurality of positioning claws 113 to fix the pump body 0, which can not only provide stable support for the pump body 0, but also limit the movement of the pump body 0 on the support block 112, and by controlling the opening and closing of the plurality of positioning claws 113, it can facilitate the installation and removal of the pump body 0 on the positioning fixture 11.

[0027] In some examples, such as Figure 2 As shown, the positioning fixture 11 also includes a video monitoring device 114, which is installed on the base 111 and faces the pump body 0. It can monitor the assembly of the pressure limiting valve in real time, obtain the assembly progress, and further avoid the occurrence of wrong installation or missing installation.

[0028] In some examples, such as Figure 2 As shown, the sealing mechanism 12 includes a fixed frame 121, a sealing cylinder 122, a guide column 123 and a sealing mechanism 124. The sealing cylinder 122 is arranged on the fixed frame 121; the guide column 123 is arranged on the fixed frame 121 and extends to the bottom of the fixed frame 121; the sealing mechanism 124 is located below the fixed frame 121 and is arranged on the guide column 123 so as to be liftable. The output end of the sealing cylinder 122 is connected to the sealing mechanism 124 and drives the sealing mechanism 124 to rise and fall along the guide column 123, so that the sealing mechanism 124 is close to or away from the pump body 0 on the positioning fixture 11. After the steel ball and the spring are installed into the pressure limiting valve hole on the pump body 0, the sealing mechanism 124 is driven by the sealing cylinder 122 to move down along the guide column 123, and the pressure limiting valve hole is closed to complete the assembly of the pressure limiting valve. Among them, the clamping and sealing of the pressure limiting valve hole by the sealing mechanism 124 is a prior art and will not be repeated here.

[0029] For some examples, see Figure 2 The detection mechanism is connected to the inlet and outlet of the pressure limiting valve on the pump body 0. After the pressure limiting valve is assembled, a certain pressure of gas or fluid is injected into the inlet to detect the opening pressure of the pressure limiting valve.

[0030] The pump body positioning device 1 of this embodiment includes a positioning fixture 11, a sealing mechanism 12 and a detection mechanism. The positioning fixture 11 is used to fix the pump body 0 to facilitate the assembly of the steel ball and the spring. The sealing mechanism 12 can close the pressure limiting valve hole after the steel ball and the spring are installed into the pressure limiting valve hole to complete the assembly of the pressure limiting valve. The detection mechanism is used to detect the opening pressure of the pressure limiting valve to ensure that the pressure limiting valve is assembled properly, so as to facilitate the subsequent assembly of the oil pump.

[0031] Figure 3 Schematic diagram of the structure of a steel ball feeding device 2 provided in this embodiment. In some embodiments, Figure 3 As shown, the steel ball feeding device 2 includes: a steel ball silo 21 and a steel ball slide 22. The steel ball silo 21 includes a bottom plate 211, a side plate 212 and a plurality of vertical partitions 214. The side plates 212 are arranged along the edge of the bottom plate 211 to enclose a receiving bin 215. One side of the receiving bin 215 has an opening 213. The bottom plate 211 is inclined toward the opening 213. A plurality of vertical partitions 214 are arranged in sequence along the inclination direction of the bottom plate 211. Both sides of the vertical partition 214 are respectively connected between the side plates 212 located on both sides of the opening 213. There is a gap between the bottom of the vertical partition 214 and the bottom plate 211. The steel ball slide 22 is arranged between the opening 213 of the steel ball silo 21 and the pump body positioning device 1. The steel balls in the accommodating bin 215 can pass through the bottom of the plurality of vertical partitions 214 in sequence under the action of their own gravity, and fall into the steel ball slide 22 through the opening 213 , and roll toward the end of the steel ball slide 22 close to the pump body positioning device 1 .

[0032] In some examples, such as Figure 3 As shown, multiple vertical partitions 214 are arranged at intervals, and the distance between two adjacent vertical partitions 214 and the distance between the bottom of each vertical partition 214 and the bottom plate 211 are adapted to the diameter of the steel balls. Such an arrangement can ensure that the steel balls in the receiving bin 215 are discharged sequentially through the bottoms of multiple vertical partitions 214, and the excess steel balls are blocked in the receiving bin 215. For example, the number of vertical partitions 214 is 3.

[0033] In some examples, such as Figure 3 As shown, the bottom plate 211 of the steel ball silo 21 is square and includes four sides. Side plates 212 are arranged on three sides of the bottom plate 211 to form a receiving bin 215, and the remaining side serves as an opening 213 of the receiving bin 215. A vertical partition 214 is connected between two side plates 212 located on both sides of the opening 213 to form a barrier at the opening 213 of the receiving bin 215.

[0034] The steel ball feeding device 2 of this embodiment includes a steel ball silo 21 and a steel ball slide 22. The steel ball silo 21 can accommodate steel balls, and the steel balls can be discharged into the steel ball slide 22 in sequence from the bottom of the vertical partition 214 to achieve uniform feeding for the steel ball installation device 3, which is conducive to the automatic installation of steel balls.

[0035] In some embodiments, Figure 3 As shown, the steel ball slide 22 includes: a guide groove 221, a lifting mechanism 222 and a steel ball positioning mechanism 223. The guide groove 221 is inclined. The guide groove 221 includes a first end 2211 and a second end 2212. The first end 2211 is higher than the second end 2212, and the first end 2211 is close to the steel ball silo 21. A groove 2213 is provided on the side wall of the guide groove 221. The groove 2213 is close to the first end 2211 and corresponds to the opening 213. The bottom plate of the guide groove 221 includes a first plate segment 2214 and a second plate segment 2215. The first plate segment 2214 is close to the first end 2211. The first plate segment 2214 can be lifted and lowered in the guide groove 221. The lifting mechanism 222 is connected to the first plate segment 2214 to drive the first plate segment 2214 to lift and lower between a high position and a low position. When the first plate section 2214 is at a low position, the plate surface of the first plate section 2214 is lower than the plate surface of the second plate section 2215, and the steel balls in the steel ball silo 21 can fall onto the plate surface of the first plate section 2214 through the opening 213 and the groove 2213 under the action of their own gravity. When the first plate section 2214 is at a high position, the plate surface of the first plate section 2214 is flush with the plate surface of the second plate section 2215, and the plate surface of the first plate section 2214 is higher than the bottom plate 211 on the side of the opening 213, and the steel balls on the first plate section 2214 can roll toward the second end 2212 of the guide groove 221 through the second plate section 2215 under the action of their own gravity. The steel ball positioning mechanism 223 includes a positioning cavity 2231, a positioning slider 2232, and an elastic support member 2233. The positioning cavity 2231 is arranged at the second end 2212 of the guide groove 221. The positioning slider 2232 is arranged in the positioning cavity 2231 so as to be liftable. The elastic support member 2233 is disposed in the positioning cavity 2231 and connected between the bottom of the positioning slider 2232 and the bottom plate of the positioning cavity 2231. A first positioning groove 2234 is disposed on the top of the positioning slider 2232. The free end of the second plate segment 2215 extends into the positioning cavity 2231 and into the first positioning groove 2234. The steel ball can enter the first positioning groove 2234 along the second plate segment 2215.

[0036] In some examples, such as Figure 3As shown, the steel ball slide 22 also includes a proximity switch 224. The proximity switch 224 is arranged on the guide groove 221, and is used to monitor the steel balls in the guide groove 221. When the steel balls on the guide groove 221 are arranged in the sensing area of ​​the proximity switch 224, the proximity switch 224 senses the signal and can control the lifting mechanism 222 to stop the feeding action. On the contrary, when the proximity switch 224 does not sense the signal, the lifting mechanism 222 continues the feeding action until the steel balls in the guide groove 221 are arranged in the sensing area of ​​the proximity switch 224. Such a setting can prevent the problem of steel ball accumulation in the guide groove 221.

[0037] In some examples, such as Figure 3 As shown, the lifting mechanism 222 includes a lifting cylinder 2221. The lifting cylinder 2221 is arranged below the first plate section 2214. The output end of the lifting cylinder 2221 is provided with a supporting plate 2222. The bottom of the first plate section 2214 is connected to the supporting plate 2222. The lifting cylinder 2221 drives the first plate section 2214 to rise and fall in the guide groove 221. The lifting stroke of the lifting cylinder 2221 can meet the lifting of the first plate section 2214 between the high position and the low position.

[0038] In some examples, such as Figure 3 As shown, the free end of the second plate segment 2215 extends into the positioning cavity 2231 and extends into the first positioning groove 2234, and the front side cavity wall of the positioning cavity 2231 and the top surface of the positioning slider 2232 are both higher than the plate surface of the second plate segment 2215. With such a configuration, when the steel ball enters the first positioning groove 2234 along the second plate segment 2215, the second plate segment 2215 supports the steel ball to achieve the positioning of the steel ball in the up-and-down direction; the top surface of the positioning slider 2232 is higher than the plate surface of the second plate segment 2215 to achieve the positioning of the steel ball in the left-and-right direction; the front side cavity wall of the positioning cavity 2231 is higher than the plate surface of the second plate segment 2215, and cooperates with the inclination angle of the second plate segment 2215 to achieve the positioning of the steel ball in the front-and-back direction.

[0039] It should be noted that Figure 3 In order to show the bottom plate structure of the guide groove 221, a partial cross-section is used on one side of the guide groove 221. In order to show the internal structure of the steel ball positioning mechanism 223, a partial cross-section is also used at the steel ball positioning mechanism 223.

[0040] The steel ball slideway 22 of this embodiment includes a guide groove 221, a lifting mechanism 222 and a steel ball positioning mechanism 223. The lifting mechanism 222 cooperates with the first plate section 2214 of the bottom plate of the guide groove 221 to control the discharge of the steel ball bin 21. The steel ball positioning mechanism 223 can realize the positioning of the steel balls, so that the steel ball installation device 3 can grab the steel balls. Specifically, an elastic support member 2233 is provided between the positioning slider 2232 and the positioning cavity 2231. Under the support of the elastic support member 2233, the bottom of the first positioning groove 2234 is in close contact with the bottom surface of the second plate segment 2215. When the positioning slider 2232 is pressed down, the elastic support member 2233 is compressed, and the positioning slider 2232 moves downward (i.e., moves toward the inside of the positioning cavity 2231). At this time, due to the support of the second plate segment 2215, the steel ball will not fall with the positioning slider 2232, so that the steel ball will be exposed from the first positioning groove 2234, which is convenient for the steel ball installation device 3 to grab the steel ball in the first positioning groove 2234. For example, the elastic support member 2233 adopts a support spring.

[0041] Figure 4 Schematic diagram of the structure of a steel ball installation device 3 provided in this embodiment. In some embodiments, Figure 4 As shown, the steel ball installation device 3 includes: a first translation mechanism 31, a first lifting mechanism 32 and a first clamping mechanism 33. The first translation mechanism 31 includes a first translation cylinder 311 and a first translation slider 312. The output end of the first translation cylinder 311 is connected to the first translation slider 312 to drive the first translation slider 312 to move in the horizontal direction. The first lifting mechanism 32 includes a first lifting cylinder 321 and a connecting seat 322. The first lifting cylinder 321 is arranged on the first translation slider 312. The output end of the first lifting cylinder 321 is connected to the connecting seat 322 to drive the connecting seat 322 to rise and fall. The first clamping mechanism 33 includes a first clamping cylinder 331 and a pair of first clamping claws 332. The first clamping claw cylinder 331 is arranged on the connecting seat 322. The output ends of the first clamping claw cylinder 331 are respectively connected to a pair of first clamping claws 332. The first clamping claw cylinder 331 can drive a pair of first clamping claws 332 to move closer to or away from each other to clamp or release the steel ball.

[0042] The steel ball installation device 3 of this embodiment includes a first translation mechanism 31, a first lifting mechanism 32 and a first clamping mechanism 33. When the steel ball installation device 3 of this embodiment is used to automatically install the steel ball, as shown in FIG. Figure 3 and Figure 4As shown, first, the first lifting cylinder 321 moves downward to drive the pair of first clamping claws 332 downward until the pair of first clamping claws 332 are respectively located on both sides of the steel ball in the first positioning groove 2234, and the lower ends of the pair of first clamping claws 332 contact the top of the positioning slide block 2232; then, the first lifting cylinder 321 continues to drive the pair of first clamping claws 332 downward, so that the pair of first clamping claws 332 press down the positioning slide block 2232, the elastic support member 2233 is compressed, and the positioning slide block 2232 moves toward the inside of the positioning cavity 2231, but because the steel ball is located on the second plate segment 2215, the steel ball will not fall with the positioning slide block 2232 under the support of the second plate segment 2215; the pair of first clamping claws 33 2 is lowered into place, the steel ball in the first positioning groove 2234 is just between the pair of first clamping claws 332; then, the first clamping claw cylinder 331 drives the pair of first clamping claws 332 to approach each other to grab the steel ball; the first lifting cylinder 321 moves upward, driving the pair of first clamping claws 332 to lift the steel ball; then, the first translation cylinder 311 drives the pair of first clamping claws 332 to move forward in the horizontal direction through the first translation slider 312, and at the same time, the first lifting cylinder 321 moves downward to drive the pair of first clamping claws 332 to descend; after the first translation cylinder 311 drives the pair of first clamping claws 332 to move into place through the first translation slider 312, the steel ball is just above the pressure limiting valve hole on the pump body 0 in the positioning fixture 11. At this time, the first clamping claw cylinder 331 drives the pair of first clamping claws 332 to move away from each other, releases the steel ball, and the steel ball falls into the pressure limiting valve hole by its own weight. At this point, the action sequence of grabbing the steel ball from the steel ball positioning mechanism 223, lifting it, moving it forward, descending it, and placing it into the pressure limiting valve hole is completed.

[0043] Figure 5 A schematic diagram of the structure of a spring feeding device 4 provided in this embodiment. In some embodiments, as Figure 5 As shown, the spring feeding device 4 includes: a vibrating feeding tray 41 and a linear vibrator 42. The vibrating feeding tray 41 is used to accommodate springs. The vibrating feeding tray 41 has a feeding port 411. The linear vibrator 42 includes a straight groove 421. One end of the straight groove 421 is connected to the feeding port 411, and the other end is connected to the spring sorting device 5. The spring can be discharged upright from the feeding port 411 and move forward along the straight groove 421 to reach the spring sorting device 5.

[0044] The vibrating loading tray 41 of this embodiment has an annular spring material bin, a loading port 411 is located at one end of the spring material bin, and one end of the straight slot 421 of the linear vibrator 42 is connected to the loading port 411. Under the action of vibration, the springs in the vibrating loading tray 41 can be discharged from the loading port 411 and enter the straight slot 421. The size of the loading port 411 only allows the springs to be discharged upright, and the size of the straight slot 421 is adapted to the outer diameter of the spring, so that the springs can only be arranged upright in the straight slot 421 in sequence, and move forward along the straight slot 421 to evenly feed the spring sorting device 5.

[0045] Figure 6 Schematic diagram of the structure of a spring sorting device 5 provided in this embodiment. In some embodiments, Figure 6 As shown, the spring picking device 5 includes: a second lifting mechanism 51, a second translation mechanism 52, a second clamping mechanism 53 and a spring transport mechanism 54. The second lifting mechanism 51 includes a second lifting cylinder 511 and a transition plate 512. The output end of the second lifting cylinder 511 is connected to the transition plate 512 to drive the transition plate 512 to rise and fall. The second translation mechanism 52 includes a second translation rail 521 and a second translation cylinder 523. The second translation cylinder 523 is arranged on the transition plate 512. The second translation rail 521 is arranged on the second translation cylinder 523. A second translation slider 522 is arranged on the second translation rail 521. The piston rod 524 of the second translation cylinder 523 is connected to the second translation slider 522 to drive the second translation slider 522 to move along the second translation rail 521. The second clamping mechanism 53 includes a second clamping cylinder 531 and a pair of second clamping jaws 532. The second clamping jaw cylinder 531 is arranged on the second translation slider 522. The output ends of the second clamping jaw cylinder 531 are respectively connected to a pair of second clamping jaws 532. The second clamping jaw cylinder 531 can drive a pair of second clamping jaws 532 to move closer to or away from each other to clamp or release the spring. The spring transport mechanism 54 includes a stopper 541, a guide block 543 and a stopper cylinder 544. A second positioning groove 542 is provided on the stopper 541. The stopper 541 is movably arranged on the guide block 543. The stopper cylinder 544 is connected to the stopper 541 to drive the stopper 541 to move along the guide block 543 between the origin and the end point. When the stopper 541 is located at the origin, the spring provided by the spring feeding device 4 can enter the second positioning groove 542. When the stopper 541 moves to the end point, the stopper 541 blocks the spring feeding device 4 , and the pair of second clamping jaws 532 can clamp the spring in the second positioning groove 542 and transport the spring to the spring detection device 6 .

[0046] In this embodiment, if Figure 5 and Figure 6 As shown, the spring transport mechanism 54 includes a stopper 541, a guide block 543 and a stopper cylinder 544. The stopper 541 is provided with a second positioning groove 542. When the stopper 541 is located at the origin, the second positioning groove 542 corresponds to the end of the straight groove 421 away from the feeding port 411, and the spring in the straight groove 421 can enter the second positioning groove 542.

[0047] After the spring enters the second positioning groove 542 , the stopper cylinder 544 drives the stopper 541 to move to the end point. At this time, the second positioning groove 542 deviates from the straight groove 421 , and the straight groove 421 is blocked by the side wall of the stopper 541 to prevent the spring in the straight groove 421 from moving out of the straight groove 421 .

[0048] When the stopper 541 is at the end position, the second lifting cylinder 511 drives the transition plate 512 downward, and then drives the pair of second clamping jaws 532 downward. When the pair of second clamping jaws 532 are in place, the spring in the second positioning groove 542 is located between the pair of second clamping jaws 532; at this time, the second clamping jaw cylinder 531 is actuated to drive the pair of second clamping jaws 532 to approach each other to clamp the spring. Afterwards, the second lifting cylinder 511 moves upward, driving the pair of second clamping jaws 532 to lift the spring, and at the same time, the second translation cylinder 523 drives the second translation slide 522 to move along the second translation slide rail 521 toward the direction of the spring detection device 6, and then drives the pair of second clamping jaws 532 to move toward the spring detection device 6. When the second lifting cylinder 511 moves up to its position and the second translation slider 522 moves into position, a pair of second clamping jaws 532 just transfers the spring to above the spring detection device 6. At this time, the second clamping jaw cylinder 531 is actuated to drive the pair of second clamping jaws 532 away from each other, thereby releasing the spring and allowing the spring to fall into the spring detection device 6 under the action of its own gravity.

[0049] Figure 7 Schematic diagram of the structure of a spring detection device 6 provided in this embodiment. In some embodiments, Figure 7 As shown, the spring detection device 6 includes: a bracket 61, a driving assembly 62, a transmission mechanism 63 and an elastic force detection mechanism 64. A positioning seat 611 is provided on the bracket 61. The spring picking device 5 can transfer the spring provided by the spring feeding device 4 to the positioning seat 611. The driving assembly 62 includes a servo motor 621 and a reducer 622. The reducer 622 is fixed to the bracket 61 through a reducer seat 623. The output end of the servo motor 621 is connected to the input end of the reducer 622. The transmission mechanism 63 includes a linear guide 631, a lead screw 632 and a lead screw seat 633. The linear guide 631 is arranged on the bracket 61. The lead screw seat 633 is movably arranged on the linear guide 631. The lead screw 632 and the lead screw seat 633 are transmitted by threaded cooperation. The output end of the reducer 622 is connected to the lead screw 632 through a coupling 634. The servo motor 621 drives the lead screw 632 to rotate through the reducer 622, thereby driving the lead screw seat 633 to move along the linear guide 631 in the direction of the positioning seat 611. The elastic force detection mechanism 64 includes a pressure sensor 641 and a positioning shaft 642. The pressure sensor 641 is arranged on the lead screw seat 633, and the measuring end of the pressure sensor 641 faces the positioning seat 611. The positioning shaft 642 is arranged at the measuring end of the pressure sensor 641. When the lead screw seat 633 moves along the linear guide 631 in the direction of the positioning seat 611, the positioning shaft 642 can be inserted into the inner ring of the spring on the positioning seat 611, and the measuring end of the pressure sensor 641 can abut against the spring to measure the elastic force of the spring.

[0050] The spring detection device 6 of this embodiment includes a bracket 61, a driving assembly 62, a transmission mechanism 63 and an elastic force detection mechanism 64. A positioning seat 611 is provided on the bracket 61. The spring picking device 5 can transfer the spring provided by the spring feeding device 4 to the positioning seat 611. After the spring is placed in the positioning seat 611, the servo motor 621 is decelerated by the reducer 622, and then drives the lead screw 632 to rotate, and the lead screw 632 drives the lead screw seat 633 to move downward along the linear guide 631. The lead screw seat 633 drives the pressure sensor 641 and the positioning shaft 642 to move downward. During the downward movement, the positioning shaft 642 is first inserted into the inner hole of the spring on the positioning seat 611 to realize the positioning of the spring. The lead screw seat 633 continues to move downward, so that the measuring end of the pressure sensor 641 presses down the spring to complete the elastic force measurement of the spring. After the measurement is completed, the servo motor 621 drives the lead screw 632 to rotate in the opposite direction, driving the lead screw seat 633 upward, and then driving the pressure sensor 641 and the positioning shaft 642 upward to reset. At this point, the elastic force test of the spring is completed. If the test is qualified, the spring installation device 7 will transfer the spring to the top of the pump body 0 in the pump body positioning device 1, and place the spring in the pressure limiting valve hole. If the test is unqualified, the spring will be treated as waste.

[0051] In this embodiment, the positioning seat 611 has a through hole, and the axis of the through hole is in the vertical direction. The diameter of the through hole is smaller than the outer diameter of the spring, but the diameter of the through hole is larger than the outer diameter of the positioning shaft 642. After the positioning shaft 642 is first inserted into the inner hole of the spring on the positioning seat 611, the screw seat 633 continues to move downward, and the positioning shaft 642 can continue to move downward through the through hole to ensure that the pressure sensor 641 can press down the spring to complete the measurement of the elastic force of the spring.

[0052] The spring detection device 6 of this embodiment is driven by a servo motor 621, and uses a screw 632 to control the displacement of a screw seat 633. A linear guide 631 is used to maintain the linear travel of the screw seat 633. A pressure sensor 641 is used to detect the spring force. The detection is convenient and fast, the detection data is accurate, and the detection action repetition accuracy is high, which saves time and effort and is conducive to improving production efficiency.

[0053] Figure 8 Schematic diagram of the structure of a spring installation device 7 provided in this embodiment. In some embodiments, Figure 8As shown, the spring installation device 7 includes: a third lifting mechanism 71, a three-position swing mechanism 72, and a third clamping mechanism 73. The third lifting mechanism 71 includes a third lifting cylinder 711 and a connecting plate 712. The output end of the third lifting cylinder 711 is connected to the connecting plate 712 to drive the connecting plate 712 to rise and fall. The three-position swing mechanism 72 includes a swing cylinder 721 and a swing arm 722. The swing cylinder 721 is arranged on the connecting plate 712. One end of the swing arm 722 is connected to the output end of the swing cylinder 721. The swing cylinder 721 can drive the swing arm 722 to rotate from the middle position to the first position or the second position. The first position and the second position are respectively located on both sides of the middle position. The third clamping mechanism 73 includes a third clamping cylinder 731 and a pair of third clamping claws 732. The third clamping claw cylinder 731 is arranged at one end of the swing arm 722 away from the swing cylinder 721. The output ends of the third clamping claw cylinder 731 are respectively connected to a pair of third clamping claws 732. The third clamping jaw cylinder 731 can drive a pair of third clamping jaws 732 to move closer to or farther from each other to clamp or release the spring. When the swing arm 722 rotates to the first position, the pair of third clamping jaws 732 can clamp the spring on the spring detection device 6. When the swing arm 722 rotates to the second position, the pair of third clamping jaws 732 can transport the clamped spring to the top of the pump body 0 in the pump body positioning device 1.

[0054] The spring installation device 7 of this embodiment includes a third lifting mechanism 71, a three-position swing mechanism 72, and a third clamping mechanism 73. After the spring detection device 6 completes the automatic detection of the spring, the swing cylinder 721 drives the swing arm 722 to rotate from the middle position to the first position, that is, the position above the positioning seat 611; then, the third lifting cylinder 711 is actuated to drive a pair of third clamping jaws 732 downward to the position, at which time the spring on the positioning seat 611 is located between the pair of third clamping jaws 732; after the third clamping jaw cylinder 731 drives a pair of third clamping jaws 732 to approach each other to grab the spring, the third lifting cylinder 711 is actuated to drive the third clamping jaws 732 upward to move the spring. The spring is taken out from the positioning seat 611; then, the swing cylinder 721 drives the swing arm 722 to rotate to the second position, that is, above the pressure-limiting valve hole of the pump body 0 in the positioning fixture 11; then, the third lifting cylinder 711 is actuated, driving a pair of third clamping jaws 732 to move downward into position, and the third clamping jaw cylinder 731 drives a pair of third clamping jaws 732 away from each other, releasing the spring, and the spring falls into the pressure-limiting valve hole of the pump body 0 by its own weight; then, the swing cylinder 721 drives the swing arm 722 to rotate to the middle position, waiting for the next installation action.

[0055] Fig. 9 Schematic diagram of the connection relationship between a pneumatic system 8 and an electrical control system 9 provided in this embodiment. Fig. 9As shown, the automatic assembly and detection system for the oil pump pressure limiting valve also includes a pneumatic system 8 and an electrical control system 9. The pneumatic system 8 is respectively connected to the pump body positioning device 1, the steel ball feeding device 2, the steel ball installation device 3, the spring feeding device 4, the spring sorting device 5, the spring detection device 6 and the spring installation device 7. The electrical control system 9 is connected to the pneumatic system 8.

[0056] The pneumatic system 8 of this embodiment includes an air source, a solenoid valve group, pipelines, etc. The pneumatic system 8 is connected to the pump body positioning device 1, the steel ball feeding device 2, the steel ball installation device 3, the spring feeding device 4, the spring picking device 5, the spring detection device 6 and the spring installation device 7 through the solenoid valve group and the pipeline to provide power for each device.

[0057] The electrical control system 9 includes an operation panel, on which a touch screen computer, a power switch, a lighting switch, a power indicator light, and a pass / fail indicator light are arranged. The electrical control system 9 controls the pump body positioning device 1, the steel ball feeding device 2, the steel ball installation device 3, the spring feeding device 4, the spring sorting device 5, the spring detection device 6, and the spring installation device 7 through the pneumatic system 8 to perform the target action, and obtains the action status and information of each device in real time.

[0058] The oil pump pressure limiting valve automatic assembly and detection system of this embodiment is arranged on a test bench. The frame of the test bench is composed of aluminum alloy profiles, and the table top of the test bench is made of steel plates. The table top is fixed to the frame with screws, and the frame is wrapped with thin steel plates with baking varnish.

[0059] The workflow of the oil pump pressure limiting valve automatic assembly and detection system implemented in this embodiment includes: 1) Fix the pump body 0 on the positioning fixture 11.

[0060] Specifically, Figure 2 As shown, the pump body 0 is fixed by the support block 112 and the positioning claws 113: the support block 112 uses the rear end face of the pump body as the bearing surface, and forms a one-side double-pin positioning method with the two positioning holes on the rear end face of the pump body to achieve the vertical positioning of the pump body; the three positioning claws 113 fit with the outer wall of the pump body 0 to achieve the horizontal positioning of the pump body 0. The pressure limiting valve hole on the pump body 0 faces upward.

[0061] 2) The steel ball feeding device 2 provides steel balls.

[0062] Specifically, Figure 3 As shown, the steel balls are stored in the storage bin 215; the steel balls in the storage bin 215 can roll toward the opening 213 along the inclined direction of the bottom plate 211 under the action of their own gravity. During the rolling process, they need to pass through the bottom of the three vertical partitions 214 in sequence to arrange the steel balls into rows so that the steel balls can be discharged from the opening 213.

[0063] A support plate 2222 is provided on the piston rod of the lifting cylinder 2221, and the first plate section 2214 is connected to the support plate 2222; when the lifting cylinder 2221 drives the first plate section 2214 to descend to a low position, the plate surface of the first plate section 2214 is lower than the plate surface of the second plate section 2215, and the steel balls in the steel ball silo 21 can fall onto the plate surface of the first plate section 2214 through the opening 213 and the groove 2213 under the action of their own gravity.

[0064] When the lifting cylinder 2221 drives the first plate section 2214 to rise to a high position, the plate surface of the first plate section 2214 is higher than the bottom plate 211 on the side of the opening 213, and the steel balls in the accommodating bin 215 are blocked at the opening 213 by the first plate section 2214, and the plate surface of the first plate section 2214 is flush with the plate surface of the second plate section 2215. The steel balls on the first plate section 2214 can roll along the guide groove 221, through the second plate section 2215, toward the direction of the positioning slider 2232 under the action of their own gravity; when the frontmost steel ball in the steel ball array in the guide groove 221 rolls to the farthest end of the second plate section 2215, it is just in the first positioning groove 2234 at the top of the positioning slider 2232.

[0065] 3) The steel ball installation device 3 installs the steel ball in the first positioning groove 2234 into the pressure limiting valve hole on the pump body 0.

[0066] Specifically, Figure 3 and Figure 4 As shown, when the steel ball installation device 3 clamps the steel ball, the first lifting cylinder 321 first drives a pair of first clamping claws 332 downward through the connecting seat 322, so that the pair of first clamping claws 332 are pressed down toward the positioning slider 2232. As the elastic support member 2233 is compressed, the positioning slider 2232 moves downward and retracts into the positioning cavity 2231, while the steel ball is still located on the second plate section 2215 and will not descend together with the positioning slider 2232. The positioning slider 2232 is pressed down by a pair of first clamping claws 332 until the steel ball is between the pair of first clamping claws 332, and the first clamping claw cylinder 331 drives the pair of first clamping claws 332 to approach each other to clamp the steel ball; after the pair of first clamping claws 332 grab the steel ball, the first lifting cylinder 321 drives the first clamping claw 332 to return upward, at this time, the first translation cylinder 311 drives the first lifting mechanism 32 and the first clamping claw mechanism 33 to move forward together, and at the same time, the first lifting cylinder 321 drives the first clamping claw 332 downward; after the steel ball is in place, it is just above the pressure limiting valve hole of the pump body 0 in the positioning fixture 11, and the first clamping claw cylinder 331 drives the pair of first clamping claws 332 to move away from each other, releasing the steel ball; the steel ball falls into the pressure limiting valve hole by its own weight. At this point, the action sequence of grabbing, lifting, moving forward, descending, and putting the steel ball into the pressure limiting valve hole from the first positioning groove 2234 is completed.

[0067] In addition, it should be noted that after the pair of first clamping claws 332 grab the steel ball in the first positioning groove 2234 and lift it, the positioning slider 2232 is reset upward under the support of the elastic support member 2233, and the steel ball in the guide groove 221 rolls forward under the action of its own gravity and enters the first positioning groove 2234, waiting for the steel ball installation device 3 to be used again. Among them, the elastic support member 2233 can be a support spring.

[0068] 4) The spring feeding device 4 provides the spring.

[0069] Specifically, Figure 5 As shown, the springs are stored in an annular vibrating loading tray 41, and the vibrating loading tray 41 has a loading port 411. As the vibrating loading tray 41 vibrates, the springs therein can be discharged upright from the loading port 411, and enter the straight groove 421 of the linear vibrator 42 in sequence, and move forward along the straight groove 421 to the spring sorting device 5. The aforementioned vibrating loading tray 41 and the linear vibrator 42 use standard components, which are all existing general technologies and will not be repeated here.

[0070] 5) The springs in the straight groove 421 enter the spring sorting device 5 in sequence, and the spring sorting device 5 transports the springs to the spring detection device 6.

[0071] Specifically, Figure 6 As shown, when the stopper 541 is located at the origin, the second positioning groove 542 on the stopper 541 is aligned with the straight groove 421, and the spring moves forward along the straight groove 421 and enters the second positioning groove 542. After the spring enters the second positioning groove 542, the stopper cylinder 544 drives the stopper 541 to move to the end point. At this time, the second positioning groove 542 deviates from the straight groove 421, and the straight groove 421 is aligned with the side wall of the stopper 541, that is, the side wall of the stopper 541 blocks the end of the straight groove 421, preventing the spring in the straight groove 421 from continuing to move forward and leaving the straight groove 421. When the stopper 541 moves to the end point with the spring in the second positioning groove 542, the second lifting cylinder 511 drives the pair of second clamping claws 532 downward; when the pair of second clamping claws 532 are in place, the spring in the second positioning groove 542 is between the pair of second clamping claws 532; the second clamping claw cylinder 531 drives the pair of second clamping claws 532 to approach each other to clamp the spring in the second positioning groove 542; after the pair of second clamping claws 532 clamp the spring, the second lifting cylinder 511 drives the pair of second clamping claws 532 upward, and at the same time, the second translation cylinder 523 drives the pair of second clamping claws 532 to move along the second translation slide rail 521 toward the direction of the spring detection device 6. At this time, the second lifting cylinder 511 drives the pair of second clamping claws 532 downward; after moving into place, the spring is just above the positioning seat 611 of the spring detection device 6, and at this time, the second clamping claw cylinder 531 drives the pair of second clamping claws 532 to move away from each other, releases the spring, and the spring falls into the positioning hole on the positioning seat 611 by its own weight.

[0072] In addition, it should be noted that, when the pair of second clamping jaws 632 lift the spring in the second positioning groove 542 , the stopper 541 returns to the origin, and the next spring in the straight groove 421 can enter the second positioning groove 542 .

[0073] 6) The spring detection device 6 performs elastic force detection on the spring in the positioning seat 611 .

[0074] Specifically, Figure 7 As shown, after the spring falls into the positioning hole on the positioning seat 611 by its own weight, the servo motor 621 drives the lead screw 632 to rotate through the reducer 622, and then drives the lead screw seat to move toward the positioning seat 611 along the 633 linear guide 631, so that the positioning shaft 642 is inserted into the inner hole of the spring to position the spring, and then the lead screw seat 633 continues to move toward the positioning seat 611 until the measuring end of the pressure sensor 641 presses down the spring to detect the spring. After the test is qualified, the servo motor 621 drives the lead screw 632 to rotate in the opposite direction, so that the lead screw seat 633 drives the pressure sensor 641 and the positioning shaft 642 to return to their original positions. The device has accurate detection, high repeatability, fast action and low noise.

[0075] 7) Use the spring installation device 7 to install the qualified spring in the positioning seat 611 into the pressure limiting valve hole on the pump body 0.

[0076] Specifically, Figure 8 As shown, after the spring in the positioning seat 611 is tested to be qualified, the swing cylinder 721 drives the swing arm 722 to rotate from the middle position to the first position, at which time the pair of third clamping claws 732 are located above the positioning seat 611. The third lifting cylinder 711 moves downward, driving the pair of third clamping claws 732 to move downward until the spring in the positioning seat 611 is located between the pair of third clamping claws 732; the third clamping claw cylinder 731 drives the pair of third clamping claws 732 to move closer to each other and clamp the spring; then the third lifting cylinder 711 drives the pair of third clamping claws 732 upward to take the spring out of the positioning seat 611; then, the swing cylinder 721 drives the swing arm 722 to rotate to the second position, at which time the pair of third clamping claws 732 are located above the pressure limiting valve hole of the pump body 0 in the positioning fixture 11; at this time, the third lifting cylinder 711 drives the pair of third clamping claws 732 downward, and after moving downward to the position, the third clamping claw cylinder 731 drives the pair of third clamping claws 732 to move away from each other, release the spring, and the spring falls into the pressure limiting valve hole by its own weight. Afterwards, the swing cylinder 721 drives the swing arm 722 to rotate to the middle position to wait for the next installation action.

[0077] 8) Clamp and seal the pressure limiting valve hole, complete the pressure limiting valve assembly, and test the opening pressure of the pressure limiting valve.

[0078] Specifically, Figure 2As shown, the sealing cylinder 122 drives the sealing mechanism 124 downward along the guide column 123; after reaching the position, the sealing mechanism 124 seals the pressure limiting valve hole; then the pressure detection mechanism is used to detect the opening pressure of the pressure limiting valve; after passing the detection, the sealing mechanism 124 moves upward and resets, and the positioning fixture 11 resets (the positioning claw 113 releases the pump body 0), and releases the pump body 0. The pump body 0 that passes the detection can enter the subsequent assembly process.

[0079] It is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0080] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention. The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention, and these improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. An automatic assembly and detection system for an oil pump pressure limiting valve, characterized in that: include: A pump body positioning device (1), a steel ball feeding device (2), a steel ball mounting device (3), a spring feeding device (4), a spring sorting device (5), a spring detection device (6) and a spring mounting device (7); The pump body positioning device (1) is used to fix the pump body (0) of the oil pump; The steel ball feeding device (2) is used to provide steel balls; The steel ball installation device (3) is used to transfer the steel ball provided by the steel ball feeding device (2) to the top of the pump body (0) in the pump body positioning device (1), and to place the steel ball in the pressure limiting valve hole on the pump body (0); The spring feeding device (4) is used to provide springs; The spring sorting device (5) is used to transfer the springs provided by the spring feeding device (4) to the spring testing device (6); The spring detection device (6) is used to detect the elastic force of the spring; The spring installation device (7) is used to transfer the spring that has passed the inspection in the spring inspection device (6) to the top of the pump body (0) in the pump body positioning device (1), and to place the spring in the pressure limiting valve hole.

2. The automatic assembly and detection system for the oil pump pressure limiting valve according to claim 1 is characterized in that: The pump body positioning device (1) comprises: a positioning fixture (11), a sealing mechanism (12) and a detection mechanism; The positioning fixture (11) is used to fix the pump body (0) of the oil pump; The sealing mechanism (12) is movably disposed above the positioning fixture (11); the sealing mechanism (12) is used to clamp and seal the pressure limiting valve hole to complete the assembly of the pressure limiting valve; The detection mechanism is used to be connected to the pump body (0) to detect the opening pressure of the pressure limiting valve.

3. The automatic assembly and detection system for the oil pump pressure limiting valve according to claim 1, characterized in that: The steel ball feeding device (2) comprises: a steel ball silo (21) and a steel ball slideway (22); The steel ball material bin (21) comprises a bottom plate (211), a side plate (212), and a plurality of vertical partitions (214); the side plates (212) are arranged along the edge of the bottom plate (211) to enclose a containing bin (215); one side of the containing bin (215) has an opening (213); the bottom plate (211) is inclined toward the opening (213); the plurality of vertical partitions (214) are arranged in sequence along the inclination direction of the bottom plate (211); the two sides of the vertical partition (214) are respectively connected between the side plates (212) located on both sides of the opening (213); a gap is formed between the bottom of the vertical partition (214) and the bottom plate (211); The steel ball slideway (22) is arranged between the opening (213) of the steel ball silo (21) and the pump body positioning device (1); The steel balls in the accommodating bin (215) can, under the action of their own gravity, sequentially pass through the bottoms of the plurality of vertical partitions (214), fall into the steel ball slideway (22) from the opening (213), and roll toward an end of the steel ball slideway (22) close to the pump body positioning device (1).

4. The automatic assembly and detection system for the oil pump pressure limiting valve according to claim 3 is characterized in that: The steel ball slideway (22) comprises: a guide groove (221), a lifting mechanism (222) and a steel ball positioning mechanism (223); The guide groove (221) is arranged obliquely; the guide groove (221) comprises a first end (2211) and a second end (2212); the first end (2211) is higher than the second end (2212), and the first end (2211) is close to the steel ball bin (21); a groove (2213) is provided on the side wall of the guide groove; the groove (2213) is close to the first end (2211) and corresponds to the opening (213); the bottom plate of the guide groove (221) comprises a first plate segment (2214) and a second plate segment (2215); the first plate segment (2214) is close to the first end (2211); the first plate segment (2214) can be raised and lowered in the guide groove (221); The lifting mechanism (222) is connected to the first plate segment (2214) to drive the first plate segment (2214) to rise and fall between a high position and a low position; when the first plate segment (2214) is at the low position, the plate surface of the first plate segment (2214) is lower than the plate surface of the second plate segment (2215), and the steel balls in the steel ball silo (21) can fall into the first plate segment (214) through the opening (213) and the groove (2213) under the action of their own gravity. on the plate surface of the plate section (2214); when the first plate section (2214) is located at the high position, the plate surface of the first plate section (2214) is flush with the plate surface of the second plate section (2215), and the plate surface of the first plate section (2214) is higher than the bottom plate (211) on the side of the opening (213), and the steel ball on the first plate section (2214) can roll toward the second end (2212) through the second plate section (2215) under the action of its own gravity; The steel ball positioning mechanism (223) comprises a positioning cavity (2231), a positioning slider (2232) and an elastic support member (2233); the positioning cavity (2231) is arranged at the second end (2212) of the guide groove (221); the positioning slider (2232) is arranged in the positioning cavity (2231) in a manner that it can be lifted or lowered; the elastic support member (2233) is arranged in the positioning cavity (2231) and is connected between the bottom of the positioning slider (2232) and the bottom plate of the positioning cavity (2231); a first positioning groove (2234) is arranged at the top of the positioning slider (2232); the free end of the second plate section (2215) extends into the positioning cavity (2231) and extends into the first positioning groove (2234); the steel ball can enter the first positioning groove (2234) along the second plate section (2215).

5. The automatic assembly and detection system for the oil pump pressure limiting valve according to claim 1, characterized in that: The steel ball installation device (3) comprises: a first translation mechanism (31), a first lifting mechanism (32) and a first clamping claw mechanism (33); The first translation mechanism (31) comprises a first translation cylinder (311) and a first translation slider (312); the output end of the first translation cylinder (311) is connected to the first translation slider (312) to drive the first translation slider (312) to move in a horizontal direction; The first lifting mechanism (32) comprises a first lifting cylinder (321) and a connecting seat (322); the first lifting cylinder (321) is arranged on the first translation slider (312); the output end of the first lifting cylinder (321) is connected to the connecting seat (322) to drive the connecting seat (322) to move up and down; The first clamping jaw mechanism (33) comprises a first clamping jaw cylinder (331) and a pair of first clamping jaws (332); the first clamping jaw cylinder (331) is arranged on the connecting seat (322); the output ends of the first clamping jaw cylinder (331) are respectively connected to the pair of first clamping jaws (332); the first clamping jaw cylinder (331) can drive the pair of first clamping jaws (332) to move closer to or farther from each other, so as to clamp or release the steel ball.

6. The automatic assembly and detection system for the oil pump pressure limiting valve according to claim 1, characterized in that: The spring loading device (4) comprises: a vibrating loading plate (41) and a linear vibrator (42); The vibrating loading tray (41) is used to accommodate the spring; the vibrating loading tray (41) has a loading port (411); The linear vibrator (42) comprises a straight groove (421); one end of the straight groove (421) is connected to the feeding port (411), and the other end is connected to the spring sorting device (5); The spring can be discharged upright from the loading port (411) and move along the straight groove (421) to reach the spring sorting device (5).

7. The automatic assembly and detection system for the oil pump pressure limiting valve according to claim 1, characterized in that: The spring sorting device (5) comprises: a second lifting mechanism (51), a second translation mechanism (52), a second clamping mechanism (53) and a spring transport mechanism (54); The second lifting mechanism (51) comprises a second lifting cylinder (511) and a transition plate (512); the output end of the second lifting cylinder (511) is connected to the transition plate (512) to drive the transition plate (512) to move up and down; The second translation mechanism (52) comprises a second translation rail (521) and a second translation cylinder (523); the second translation cylinder (523) is arranged on the transition plate (512); the second translation rail (521) is arranged on the second translation cylinder (523); a second translation slider (522) is arranged on the second translation rail (521); a piston rod (524) of the second translation cylinder (523) is connected to the second translation slider (522) to drive the second translation slider (522) to move along the second translation rail (521); The second clamping jaw mechanism (53) comprises a second clamping jaw cylinder (531) and a pair of second clamping jaws (532); the second clamping jaw cylinder (531) is arranged on the second translation slider (522); the output ends of the second clamping jaw cylinder (531) are respectively connected to the pair of second clamping jaws (532); the second clamping jaw cylinder (531) can drive the pair of second clamping jaws (532) to move closer to or farther from each other, so as to clamp or release the spring; The spring transport mechanism (54) comprises a stopper (541), a guide block (543) and a stopper cylinder (544); the stopper (541) is provided with a second positioning groove (542); the stopper (541) is movably arranged on the guide block (543); the stopper cylinder (544) is connected to the stopper (541) to drive the stopper (541) to move along the guide block (543) between an origin and an end point; When the stopper (541) is located at the origin, the spring provided by the spring feeding device (4) can enter the second positioning groove (542); When the stopper (541) moves to the end point, the stopper (541) blocks the spring feeding device (4), and a pair of second clamping jaws (532) can clamp the spring in the second positioning groove (542) and transfer the spring to the spring detection device (6).

8. The automatic assembly and detection system for the oil pump pressure limiting valve according to claim 1, characterized in that: The spring detection device (6) comprises: a bracket (61), a driving assembly (62), a transmission mechanism (63) and an elastic force detection mechanism (64); A positioning seat (611) is provided on the bracket (61); the spring sorting device (5) is capable of transferring the spring provided by the spring feeding device (4) to the positioning seat (611); The driving assembly (62) comprises a servo motor (621) and a reducer (622); the reducer (622) is fixed to the bracket (61) via the reducer seat (623); the output end of the servo motor (621) is connected to the input end of the reducer (622); The transmission mechanism (63) comprises a linear guide rail (631), a lead screw (632) and a lead screw seat (633); the linear guide rail (631) is arranged on the bracket (61); the lead screw seat (633) is movably arranged on the linear guide rail (631); the lead screw (632) and the lead screw seat (633) are transmitted by threaded engagement; the output end of the reducer (622) is connected to the lead screw (632) via a coupling (634); the servo motor (621) drives the lead screw (632) to rotate via the reducer (622), thereby driving the lead screw seat (633) to move along the linear guide rail (631) in the direction of the positioning seat (611); The elastic force detection mechanism (64) comprises a pressure sensor (641) and a positioning shaft (642); the pressure sensor (641) is arranged on the lead screw seat (633), and the measuring end of the pressure sensor (641) faces the positioning seat (611); the positioning shaft (642) is arranged at the measuring end of the pressure sensor (641); When the lead screw seat (633) moves along the linear guide rail (631) in the direction of the positioning seat (611), the positioning shaft (642) can be inserted into the inner ring of the spring on the positioning seat (611), and the measuring end of the pressure sensor (641) can abut against the spring to measure the elastic force of the spring.

9. The automatic assembly and detection system for the oil pump pressure limiting valve according to claim 1, characterized in that: The spring installation device (7) comprises: a third lifting mechanism (71), a three-position swing mechanism (72), and a third clamping claw mechanism (73); The third lifting mechanism (71) comprises a third lifting cylinder (711) and a connecting plate (712); the output end of the third lifting cylinder (711) is connected to the connecting plate (712) to drive the connecting plate (712) to move up and down; The three-position swing mechanism (72) comprises a swing cylinder (721) and a swing arm (722); the swing cylinder (721) is arranged on the connecting plate (712); one end of the swing arm (722) is connected to the output end of the swing cylinder (721); the swing cylinder (721) can drive the swing arm (722) to rotate from a middle position to a first position or a second position; the first position and the second position are respectively located on both sides of the middle position; The third clamping mechanism (73) comprises a third clamping cylinder (731) and a pair of third clamping jaws (732); the third clamping cylinder (731) is arranged at an end of the swing arm (722) away from the swing cylinder (721); the output ends of the third clamping cylinder (731) are respectively connected to the pair of third clamping jaws (732); the third clamping cylinder (731) can drive the pair of third clamping jaws (732) to move closer to or farther from each other, so as to clamp or release the steel ball; When the swing arm (722) rotates to the first position, the pair of third clamps (732) can clamp the spring on the spring detection device (6); when the swing arm (722) rotates to the second position, the pair of third clamps (732) can transfer the clamped spring to above the pump body (0) in the pump body positioning device (1).

10. The automatic assembly and detection system for the oil pump pressure limiting valve according to claim 1, characterized in that: Also includes: Pneumatic system (8) and electrical control system (9); The pneumatic system (8) is respectively connected to the pump body positioning device (1), the steel ball feeding device (2), the steel ball installation device (3), the spring feeding device (4), the spring sorting device (5), the spring detection device (6) and the spring installation device (7); The electrical control system (9) is connected to the pneumatic system (8).

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