Test equipment for valve core automatic assembly line

Abstract

The present invention provides a testing device for a valve core automatic assembly line, comprising a support seat, a lifting and positioning assembly, a height limiting structure, a detection head, a workpiece clamping assembly and a valve stem driving assembly, wherein the lifting and positioning assembly is arranged at the bottom of the support seat, and is used to limit the position of the carrier in the horizontal plane, the height limiting structure is fixed on the support seat, and is used to limit the position of the carrier in the height direction, the workpiece clamping assembly is arranged at the top of the support seat, and is used to clamp the workpiece on the carrier, the valve stem driving assembly is arranged at the top of the support seat, and is used to move and rotate the valve stem of the assembled valve core to be in different use states, and the detection head is movably arranged on the support seat, so that the detection head can move to the bottom of the workpiece after positioning and clamping to perform air tightness testing. The testing device for the valve core automatic assembly line of the present invention can improve the accuracy of air tightness detection and the efficiency of detection.

Description

Technical Field

[0001] The invention relates to a valve core manufacturing device for a faucet, in particular to a testing device for a valve core automatic assembly line. Background Art

[0002] The valve core is the core component of the faucet switch and the adjustment of hot and cold water. Figure 1 , 2 As shown, the valve core produced by our company includes a valve stem assembly 101, a moving piece assembly 102, a static piece assembly 103 and a housing 104. These four components need to be combined in order to form a valve core, and lubricating oil needs to be added to the moving piece assembly 102 and the static piece assembly 103 respectively during assembly. At present, the assembly of valve cores is mostly completed by automated assembly lines. After searching, it was found that there are the following relatively close prior arts, for example, the invention patent with application number CN201822083922.X discloses a large valve core assembly machine. The invention patent with application number CN201710224951.0 discloses a faucet valve core assembly machine. The invention patent with application number CN201821304500.4 discloses a mixed valve core automatic assembly line. Through comparative analysis, it was found that the structures and assembly methods of valve cores produced by different companies are not the same, and the existing automated assembly lines cannot adapt to the assembly of our company's valve cores. Therefore, it is urgent to develop an automatic assembly line that can adapt to our company's valve cores. After the valve core is automatically assembled, it needs to be tested for air tightness immediately to distinguish good or bad products. Our company specially designed this patent application based on its own production needs. Summary of the invention

[0003] In view of the above, the present invention provides a testing device for a valve core automatic assembly line, which can improve the accuracy and efficiency of air tightness detection.

[0004] The technical solution involved in the present invention:

[0005] A testing device for a valve core automatic assembly line comprises a support seat, a lifting and positioning assembly, a height limiting structure, a detection head, a workpiece clamping assembly and a valve stem driving assembly. The lifting and positioning assembly is arranged at the bottom of the support seat, and is used to limit the carrier in the horizontal plane. The height limiting structure is fixed on the support seat, and is used to limit the carrier in the height direction. The workpiece clamping assembly is arranged at the top of the support seat, and is used to clamp the workpiece on the carrier. The valve stem driving assembly is arranged at the top of the support seat, and is used to move and rotate the valve stem of the assembled valve core to different use states. The detection head is movably arranged on the support seat, so that the detection head can be moved to the bottom of the workpiece after positioning and clamping to perform an air tightness test.

[0006] Furthermore, the support seat includes fixed feet, a lower support plate, an upper support plate and support columns. A plurality of fixed feet are fixed to the bottom of the lower support plate. The lower support plate and the upper support plate are arranged in parallel and are fixed to each other by support columns. The lifting and positioning assembly and the height limiting structure are fixed on the lower support plate. The detection head is movably arranged on the lower support plate. The workpiece clamping assembly and the valve stem driving assembly are arranged on the upper support plate.

[0007] Furthermore, the lifting and positioning assembly includes a lifting and positioning drive, a positioning plate and a positioning protrusion. The positioning drive is fixed to the lower support plate, the piston rod end of the positioning drive faces upward and is fixed with the positioning plate, and the upper surface of the positioning plate is fixed with a positioning protrusion.

[0008] Furthermore, the height limiting structure includes two height limiting frames arranged relatively on both sides of the lifting and positioning assembly.

[0009] Furthermore, the height limiting frame includes a height limiting rod and a height limiting block, and the height limiting block is fixed on the support seat through two height limiting rods.

[0010] Furthermore, the detection head performs air tightness detection by vacuuming or inflating, and the detection head is provided with three air nozzles with openings facing upwards.

[0011] Furthermore, it comprises a detection head driving assembly for driving the detection head to move, and the detection head and the detection head driving assembly are arranged in two sets relatively and are respectively located on both sides of the lifting and positioning assembly.

[0012] Furthermore, the detection head driving assembly includes a vertical driving member and a horizontal driving member. The vertical driving member is fixed to the bottom of the support seat. The lifting end of the vertical driving member faces upward and is fixed with the horizontal driving member. The horizontal moving end of the horizontal driving member is fixed with the detection head.

[0013] Furthermore, the workpiece clamping assembly includes a mounting frame, a clamping drive, a synchronization block, a pressure rod and a clamping plate. The mounting frame is fixed to the top of the support seat, the clamping drive is fixed on the mounting frame, the piston rod of the clamping drive faces downward and is connected to the synchronization block, pressure rods are installed at both ends of the synchronization block, the two pressure rods pass downward through the top of the support seat, and the bottom ends of the two pressure rods are fixedly connected by the clamping plate.

[0014] Furthermore, the valve stem drive assembly includes a fixed seat, a rotary drive member, a rotary chuck, an opening drive member, a closing drive member, a push plate and a push rod. The fixed seat is fixed to the top of the support seat. Guide sleeves are provided at the four corners of the fixed seat. Each pressure rod is inserted into the corresponding guide sleeve. The rotary drive member is fixed to the top of the support seat and is located between the two pressure rods. The rotating axis of the rotary drive member faces downward and is provided with a rotary chuck. The rotary chuck extends downward to under the fixed seat. A limited position opening is provided on the rotary chuck. A through hole is provided on the clamping plate for the rotary chuck to pass through. The opening drive member and the closing drive member are both fixed to the bottom of the fixed seat. The opening drive member and the closing drive member are both provided with push plates that can slide back and forth. A push rod is fixed on each push plate.

[0015] Beneficial effects of the present invention:

[0016] The present invention is a testing device for a valve core automatic assembly line, which is matched by setting a support seat, a lifting and positioning assembly, a height-limiting structure, a detection head, a workpiece clamping assembly and a valve stem drive assembly. The lifting and positioning assembly lifts the carrier up and holds it against the height-limiting structure for positioning, the workpiece clamping assembly descends to clamp the valve core on the carrier, and the detection head moves to the bottom of the valve core, so that the three air nozzles of the detection head are respectively sealed and connected with the hot water cavity, the cold water cavity and the water outlet cavity at the bottom of the valve core, and the valve stem is driven to different use states by the valve stem drive assembly, so as to detect the air tightness of each use state. In this way, the accuracy of air tightness detection and the efficiency of detection can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 An exploded view of a valve core to be assembled in the valve core automatic assembly line of the present invention;

[0018] Figure 2 It is an assembly diagram of the valve core to be assembled in the valve core automatic assembly line of the present invention;

[0019] Figure 3 It is an assembly diagram of the valve core automatic assembly line of the present invention;

[0020] Figure 4 It is a partial assembly diagram of the valve core automatic assembly line of the present invention;

[0021] Figure 5 It is an assembly diagram of the circulating conveying device of the valve core automatic assembly line of the present invention;

[0022] Figure 6 It is a first partial enlarged view of the circulating conveying device of the valve core automatic assembly line of the present invention;

[0023] Figure 7 A second partial enlarged view of the circulating conveying device of the valve core automatic assembly line of the present invention;

[0024] Figure 8A top view of a circulating conveying device of a valve core automatic assembly line of the present invention;

[0025] Fig. 9 It is a partial enlarged view of the longitudinal conveying mechanism of the valve core automatic assembly line of the present invention;

[0026] Fig.10 It is a partial front view of the longitudinal conveying mechanism of the valve core automatic assembly line of the present invention;

[0027] Fig.11 A three-dimensional diagram of a carrier of a circulating conveying device of a valve core automatic assembly line of the present invention;

[0028] Fig.12 A front view of a carrier of a circulating conveying device of a valve core automatic assembly line of the present invention;

[0029] Fig.13 A bottom view of a carrier of a circulating conveying device of a valve core automatic assembly line of the present invention;

[0030] Fig.14 A three-dimensional diagram of a first refueling device of the valve core automatic assembly line of the present invention;

[0031] Fig.15 It is a partial front view of the first refueling device of the valve core automatic assembly line of the present invention;

[0032] Fig.16 It is a partial enlarged view of the first refueling device of the valve core automatic assembly line of the present invention;

[0033] Fig.17 A three-dimensional diagram of a second refueling device of the valve core automatic assembly line of the present invention;

[0034] Fig.18 A three-dimensional diagram of an assembly device of a valve core automatic assembly line of the present invention;

[0035] Fig.19 A front view of a positioning and clamping mechanism of an assembly device of a valve core automatic assembly line of the present invention;

[0036] Fig. 20 It is a cross-sectional view of the valve core automatic assembly line of the present invention at the location of the positioning clamping mechanism;

[0037] Fig.21 A three-dimensional diagram of a gripper of an assembly device of a valve core automatic assembly line of the present invention;

[0038] Fig. 22 A three-dimensional diagram of a test device for the valve core automatic assembly line of the present invention;

[0039] Fig.23 It is a front view of the testing device of the valve core automatic assembly line of the present invention;

[0040] Fig.24 It is a partial enlarged view of the testing device of the valve core automatic assembly line of the present invention. DETAILED DESCRIPTION

[0041] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the protection scope of the present invention.

[0042] See also Figures 1 to 4 The present invention provides a valve core automatic assembly line for assembling a valve stem assembly 101, a moving piece assembly 102, a stationary piece assembly 103 and a housing 104 into a valve core. The valve core automatic assembly line comprises a circulating conveying device 1, a first refueling device 2, a second refueling device 3, an assembly device 4, a testing device 5, an inkjet printer (not shown) and a sorting robot 6. The circulating conveying device 1 is used for circulating multiple components of the valve core to each workstation. The first refueling device 2, the second refueling device 3, the assembly device 4, the testing device 5, the inkjet printer and the sorting robot 6 are arranged in sequence along the conveying direction of the circulating conveying device 1 ( Figure 4 The direction of the arrow in the middle is the conveying direction). The first refueling device 2 and the second refueling device 3 are respectively used to spray lubricating oil on different components of the valve core. Specifically, the first refueling device 2 is used to spray lubricating oil on the movable plate assembly 102 and the static plate assembly 103, and the second refueling device 3 is used to spray lubricating oil on the outer shell 104. The assembly device 4 is used to assemble the components of the valve core after oil spraying. The testing device 5 is used to perform an air tightness test on the assembled valve core, and feed back the test results to the sorting robot 6, so that the sorting robot 6 can grab the good valve core to the inkjet printer for coding and then put it back to the circulating conveying device 1 for continued transportation, and grab the defective valve core to the corresponding recycling container. There is a loading and unloading station between the first refueling device 2 and the sorting robot 6, for placing multiple components of the valve core on the circulating conveying device 1, and removing the good valve core after coding.

[0043] See also Figures 5 to 10The circulating conveying device 1 includes a conveying frame 11, two sets of longitudinal conveying mechanisms 12, two sets of transverse conveying mechanisms 13, a plurality of carriers 14, a turning guide structure 15, a plurality of in-position detectors 16, a plurality of blocking mechanisms 17 and a positioning assembly 18. The two sets of longitudinal conveying mechanisms 12 are respectively arranged in parallel on one opposite side of the conveying frame 11, and the two sets of transverse conveying mechanisms 13 are respectively arranged in parallel on the other opposite side of the conveying frame 11, forming a square conveying track structure. A plurality of carriers 14 are carried on the square conveying track structure for conveying, and are used to place and position a plurality of components of the valve core. The turning guide structure 15 is arranged at each corner position of the square conveying track structure to guide the carrier 14 to turn. A plurality of in-place detectors 16 and a plurality of blocking mechanisms 17 are arranged at each workstation. A positioning component 18 is provided at the loading and unloading station, the first refueling device 2 and the sorting robot 6. A special positioning device is provided at the second refueling device 3, the assembly device 4 and the testing device 5 so that the in-place detector 16 can detect whether the carrier 14 has moved to the corresponding workstation and block the carrier 14 at the corresponding workstation for positioning.

[0044] In order to further improve production efficiency, a reserved station detector 19 and a blocking mechanism 17 are set in front of each station to detect whether the carrier 14 moves to the reserved station and block the carrier 14 at the reserved station, and then release the carrier 14 after the corresponding station is processed.

[0045] Preferably, both the in-place detector 16 and the reserved position detector 19 can be selected from photoelectric sensors. In addition, the in-place detector 16 and the reserved position detector 19 can also be selected from other types of position sensors.

[0046] The conveyor frame 11 includes a top frame 111 and a plurality of support legs 112 fixed to the top frame 111. The top frame 111 is a rectangular structure formed by four sides, and each side of the top frame 111 includes two parallel support beams 113. The blocking mechanism 17 and the positioning assembly 18 are respectively fixed on the support beams 113 and are located between the two support beams 113 on the sides of the top frame 111. It can be understood that each side of the top frame 111 can also use a support beam 113, as long as the support beam 113 has the required installation width. However, the method of using two support beams 113 is more convenient to manufacture.

[0047] The longitudinal conveying mechanism 12 includes a driven wheel group 121, a transmission wheel group 122, a support guide bar 123, a conveyor belt 124 and a conveying driving member 125. The driven wheel group 121 and the transmission wheel group 122 are respectively installed at the two ends of the top frame 111. There are two sets of support guide bars 123, which are respectively fixed on the two support beams 113 on the side of the top frame 111. When only one support beam 113 is used on the side of the top frame 111, the two sets of support guide bars 123 are parallelly fixed on the same support beam 113. The two ends of the support guide bar 123 extend to the positions of the driven wheel group 121 and the transmission wheel group 122 respectively. There are two conveyor belts 124, which are respectively wound on the two side wheel bodies of the driven wheel group 121 and the transmission wheel group 122. The support guide bar 123 is provided with a slide groove extending along the length direction, and the upward section of each conveyor belt 124 is slidably set in the slide groove of the corresponding support guide bar 123. The support beam 113 is provided with a guide structure extending along the length direction of the support beam 113. Preferably, the guide structure is a guide hole 130 ( Fig. 20 As shown in FIG. 1 , the lower section of each conveyor belt 124 can be slidably inserted into the guide hole 130. The conveyor drive member 125 is fixed to one end of the top frame 111 close to the transmission wheel group 122, and is used to drive the transmission wheel group 122 to rotate. The rotation of the transmission wheel group 122 drives the conveyor belt 124 to rotate through the two driven wheel groups 121.

[0048] The driven wheel assembly 121 includes a driven wheel seat 1211 fixed to one end of the top frame 111 and driven wheels 1212 rotatably mounted on both sides of the driven wheel seat 1211 , so that one ends of two parallel conveyor belts 124 are respectively wound around the driven wheels 1212 on both sides.

[0049] The transmission wheel assembly 122 includes a transmission wheel seat 1221, a transmission wheel 1222 and a tension wheel 1223. The transmission wheel seat 1221 is fixed to the end of the top frame 111 opposite to the driven wheel seat 1211. The transmission wheels 1222 are rotatably mounted on both sides of the transmission wheel seat 1221. The transmission wheels 1222 are driven to rotate by the conveying driving member 125. The conveying driving member 125 can be a reduction motor. Two tension wheels 1223 arranged up and down are rotatably mounted on the transmission wheel seat 1221 above the transmission wheel 1222, so that the other ends of the two parallel conveyor belts 124 are respectively wound around the transmission wheels 1222 and the tension wheels 1223 on both sides.

[0050] The structure of the transverse conveying mechanism 13 is substantially the same as that of the longitudinal conveying mechanism 12, and the length of the transverse conveying mechanism 13 is shorter than that of the longitudinal conveying mechanism 12. The two sets of transverse conveying mechanisms 13 and the two sets of longitudinal conveying mechanisms 12 form a square conveying track structure.

[0051] The carrier 14 includes a carrier body 141, a plurality of positioning seats 142 fixed on the upper surface of the carrier body 141 for placing valve core components, and four guide posts 143 arranged on the lower surface of the carrier body 141. The four guide posts 143 are arranged in a rectangular shape. The lower surface of the carrier body 141 is supported on the upper surfaces of two parallel conveyor belts 124, so that when the two conveyor belts 124 are running, the carrier body 141 is driven to move by the friction between the lower surface of the carrier body 141 and the upper surfaces of the two conveyor belts 124. The four guide posts 143 are slidably arranged on the outer side of each support guide bar 123 in pairs, that is, two guide posts 143 are correspondingly arranged on the outer side of each support guide bar 123. The carrier body 141 is guided by the four guide posts 143 to maintain linear motion along the direction of the conveyor belt 124, so as to prevent the carrier body 141 from deviating to its sides and causing poor operation. Preferably, the carrier body 141 includes a slider 1411 , a connecting column 1412 and a supporting plate 1413 . The slider 1411 is slidably disposed on the two conveyor belts 124 . The slider 1411 and the supporting plate 1413 are disposed in parallel and fixedly connected to the supporting plate 1413 via a plurality of connecting columns 1412 .

[0052] The turning guide structure 15 includes an inner guide member 151, an outer guide member 152 and a transition plate 153. The inner guide member 151 is fixed to the inner side of the corner position of the top frame 111. The inner guide member 151 is provided with a guide groove 150, which is a circular right-angle groove. There are two outer guide members 152, which are fixed at intervals on the outer side of the corner position of the top frame 111. The spacing between the two outer guide members 152 is equivalent to the spacing between the two guide posts 143 on the outer side of the carrier body 141. Each outer guide member 152 is provided with a horizontal surface 1522 located in the same plane as the upper surface of the conveyor belt 124 and an inclined surface 1521 connected to the horizontal surface 1522. The two guide posts 143 on the outer side of the carrier body 141 are elastically retractable. When the carrier 14 moves to the position of the outer guide member 152 driven by the two conveyor belts 124, the two guide posts 143 on the outer side of the bottom of the carrier 14 hit the inclined surfaces 1521 of the two outer guide members 152 in turn and retract, and then move to the horizontal surface 1522 of the two outer guide members 152. The transition plate 153 is used to fill the space between the two conveyor belts 124 at the corner position to support the carrier 14 to pass through when turning.

[0053] It is understandable that only one outer guide member 152 may be provided, as long as the length of the outer guide member 152 extending along the conveying direction is equal to the distance between the two retractable guide posts 143 on the outer side of the carrier body 141 .

[0054] It is understandable that the guide groove 150 may also be a rounded obtuse angle groove or a rounded acute angle groove, so as to achieve an obtuse angle or an acute angle turn. Compared with the semicircular track turning conveying device of the prior art, the circulating conveying device 1 can achieve more flexible various sharp turning angles, making the overall structure layout more compact, and effectively shortening the conveying stroke when a right-angle turn is adopted, thereby improving the conveying efficiency.

[0055] The blocking mechanism 17 includes a blocking driving member 171 and a blocking portion 172 fixed to the lifting end of the blocking driving member 171. The blocking driving member 171 is fixed to the support beam 113. The blocking portion 172 is escalably disposed between the two support beams 113 of the side frame of the top frame 111 to block or release the carrier 14 disposed above the two support beams 113 and movable along the conveying direction. When the blocking portion 172 extends upward, the blocking portion 172 blocks the carrier 14, causing the carrier 14 to stop moving. When the blocking portion 172 retracts downward, the blocking portion 172 releases the carrier 14, causing the carrier 14 to continue moving.

[0056] The positioning assembly 18 includes a positioning drive 181 and a positioning member 182. The positioning drive 181 is fixedly disposed below the two conveyor belts 124. The positioning member 182 is lifted and lowered between the two conveyor belts 124 through the positioning drive 181. The bottom of the carrier 14, that is, the bottom of the slider 1411, is provided with a positioning hole 1410 corresponding to the positioning member 182, so that the positioning member 182 can be inserted into the positioning hole 1410 when it rises to realize the positioning of the carrier 14. The positioning member 182 includes at least two positioning rods.

[0057] Preferably, both the blocking driving member 171 and the positioning driving member 181 can be cylinders. In addition, other retractable driving devices can also be used.

[0058] It can be understood that the circulating conveying device 1 can be applied to various technical fields where conveying needs to be achieved.

[0059] The circulating conveying device 1 is provided with a square conveying track structure formed by two sets of longitudinal conveying mechanisms 12 and two sets of transverse conveying mechanisms 13 on the conveying frame 11, and the carrier 14 is driven by the longitudinal conveying mechanism 12 and the transverse conveying mechanism 13 and guided by the turning guide structure 15 to move along the square conveying track structure. In this way, the carrier 14 can be moved to each station for processing, which provides a basis for material transportation for production automation. By providing multiple in-place detectors 16, multiple blocking mechanisms 17 and multiple positioning components 18 on the conveying frame 11, it is convenient to automatically detect the station reached by the carrier 14, and block the carrier 14 at the station to prevent it from continuing to move, and then position the carrier 14 through the positioning component 18 for processing, and after processing, the blocking mechanism 17 releases the carrier 14, and the carrier 14 continues to move to the next station for processing. In this way, the coherent production of multiple processing steps can be achieved, which is conducive to improving the degree of automation of production.

[0060] See also Figures 14 to 16 The first refueling device 2 includes a support portion 21, a slide module 22, a lifting drive member 23, a connecting seat 24, a fuel injection pump 25, a fuel injection head 26, and a first oil tank 27 ( Figure 3 ) and an oil receiving device 28, the slide module 22 is horizontally fixed on the support part 21, the lifting drive member 23 is fixed on the horizontal sliding part of the slide module 22, the connecting seat 24 is fixed on the lifting end of the lifting drive member 23, the oil injection pump 25 is fixed above the connecting seat 24, the oil injection head 26 is fixed below the connecting seat 24, the oil injection pump 25 is connected to the first oil tank 27 through an oil suction pipe, and the oil injection head 26 is connected to the oil injection pump 25, so that the lubricating oil sucked out from the first oil tank 27 by the oil injection pump 25 is sprayed downward intermittently through the oil injection head 26, and then the lubricating oil is sprayed on the valve core component of the carrier 14. In this embodiment, two oil injection heads 26 are provided to oil two valve core components at the same time, and finally one carrier 14 can be assembled into two valve core finished products. The oil receiving device 28 is arranged on the slide module 22, so as to move to the bottom of the oil injection head 26 to receive the excess lubricating oil overflowed from the oil injection head 26. This can prevent excess lubricating oil from falling to the ground and polluting the working environment, and can save lubricating oil.

[0061] The lifting drive member 23 includes a cylinder body 231, a piston rod 232, a guide column 233, a lifting block 234 and a synchronization rod 235. The piston rod 232 is telescopically arranged in the cylinder body 231. The cylinder body 231 is provided with guide holes on both sides of the piston rod 232. A guide column 233 is slidably arranged in each guide hole. The top ends of the two guide columns 233 are connected to the synchronization rod 235. The bottom ends of the two guide columns 233 and the piston rod 232 are connected to the lifting block 234. The connecting seat 24 is fixed on the lifting block 234.

[0062] Since the height of the moving piece assembly 102 and the height of the static piece assembly 103 are inconsistent, the height of the oil spray head 26 needs to be controlled separately when refueling these two components. The first refueling device 2 also includes a limit assembly 29 arranged at the top of the cylinder body 231, which is used to provide two different limit heights for the synchronization rod 2353 to move. The limiting assembly 29 includes a guide rail seat 291, a guide slide 292, a limiting driving member 293, a first limiting portion 294, a second limiting portion 295 and a push rod 296. The guide rail seat 291 is fixed to the top of the cylinder body 231, the guide slide 292 is slidably arranged on the guide rail seat 291, the limiting driving member 293 is fixed on the guide rail seat 291, the first limiting portion 294 and the second limiting portion 295 are relatively arranged on the guide slide 292 and are located at both ends of the sliding direction of the guide slide 292, the height of the first limiting portion 294 and the height of the second limiting portion 295 are not equal, and the push rod 296 is downwardly arranged on the synchronization rod 235, so that when the limiting driving member 293 drives the guide slide 292 to slide, the first limiting portion 294 or the second limiting portion 295 is driven to resist the push rod 296 to achieve different limiting heights. It is understandable that the push rod 296 can also be omitted, and it is only necessary to increase the height of the first limiting portion 294 and the second limiting portion 295. The synchronization rod 235 directly abuts against the upper limit of the first limiting portion 294 or the second limiting portion 295.

[0063] In this embodiment, the first limiting portion 294 is a limiting block, and the second limiting portion 295 and the push rod 296 are both bolts that can be raised and lowered and adjusted.

[0064] Preferably, the slide module 22 can use an existing screw electric slide to achieve translation, and the lifting drive member 23 can use a cylinder.

[0065] The oil receiving device 28 includes an oil receiving drive 281 and an oil receiving container 282. The oil receiving drive 281 is fixed on the slide module 22, and the oil receiving container 282 is fixed on the power output part of the oil receiving drive 281 with the opening facing upward, so that the oil receiving drive 281 drives the oil receiving container 282 to move below the oil spray head 26. The oil receiving drive 281 can drive the oil receiving container 282 to rotate to below the oil spray head 26 in a rotating manner, and the oil receiving drive 281 can also move to below the oil spray head 26 in a translational manner.

[0066] Preferably, the oil receiving container 282 is connected to the first oil tank 27 through a recovery pipe, so that the lubricating oil in the oil receiving container 282 can flow into the first oil tank 27 for reuse.

[0067] The first refueling device 2 is provided with a slide module 22, a lifting drive 23, a connecting seat 24, an oil injection pump 25, an oil injection head 26 and a first oil tank 27 on the support part 21. The slide module 22 and the lifting drive 23 can drive the oil injection pump 25 and the oil injection head 26 to move to the valve core component of the carrier 14 for automatic oil injection, and the lubricating oil can be continuously supplied through the first oil tank 27. In this way, the valve core component can be quickly sprayed with oil, and a uniform oil injection effect can be achieved.

[0068] See also Fig.17 The second refueling device 3 includes a support 31, an oil pump 32, an oil overflow head 33 and a second oil tank 34 ( Figure 3 ), the oil pump 32 is fixed on the support 31, the oil overflow head 33 is arranged upward and connected to the oil pump 32, and the oil pump 32 is connected to the second oil tank 34 through an oil extraction pipe, so that the lubricating oil in the second oil tank 34 can be extracted by the oil pump 32 and intermittently overflow from the oil overflow head 33.

[0069] See also Figures 18 to 21 , the assembly device 4 is arranged close to the second refueling device 3 so that these two processing steps can be completed at the same workstation. The assembly device 4 includes a positioning clamping mechanism 41 and an assembly manipulator 42. The positioning clamping mechanism 41 includes a base 411, a guide rod 412, a lifting seat 413, a lifting drive member 414, a clamping seat 415 and a positioning column 416. The four corners of the top surface of the base 411 are fixedly provided with guide rods 412. The lifting seat 413 can be lifted and slidably sleeved on the four guide rods 412. The lifting drive member 414 is fixed on the base 411. The lifting rod of the lifting drive member 414 is connected to the lifting seat 413 to drive the lifting seat 413 to lift. The top of the two guide rods 412 on each side is fixed with a clamping seat 415. When installed and used, the two clamping seats 415 are relatively arranged on both sides of the longitudinal conveying mechanism 12. Two positioning columns 416 are erected on both sides of the lifting seat 413. The supporting plate 1413 of the carrier 14 is wider than the slider 1411. The two sides of the supporting plate 1413 extend from the two sides of the slider 1411 respectively. The extending side of the supporting plate 1413 is provided with a limiting hole 1414 ( Fig.13 ), so that the positioning posts 416 on both sides of the lifting seat 413 are inserted into the corresponding limiting holes 1414 when rising to limit the position of the carrier 14, and the continued rise of the positioning posts 416 after positioning the carrier 14 can drive the carrier 14 to rise and be clamped between the positioning posts 416 and the clamping seat 415. The assembly robot 42 is used to grab the workpiece that has been positioned and clamped by the positioning and clamping mechanism 41 for assembly.

[0070] The lifting seat 413 includes a lifting plate 4131 and sliding sleeves 4132 fixed at four corners of the lifting plate 4131 . The guide rod 412 is slidably disposed in the sliding sleeves 4132 .

[0071] The clamping seat 415 includes a bottom plate 4151, a fixing column 4152 and a top plate 4153. The bottom plate 4151 is fixed to the top of two guide rods 412 on one side, and the top plate 4153 is fixed to the top of the bottom plate 4151 through the fixing column 4152. Preferably, the bottom plate 4151 is provided with a guide hole 4150 for the positioning column 416 to slide through.

[0072] The assembly robot 42 includes a machine base 421, a swivel arm 422, a machine head 423, an assembly drive 424 and a gripper 425. One end of the swivel arm 422 is rotatably connected to the machine base 421, and the other end of the swivel arm 422 is rotatably connected to the machine head 423. The assembly drive 424 is vertically installed on the machine head 423. The lifting end of the assembly drive 424 faces downward and is equipped with a gripper 425. The gripper 425 is used to grab the valve core components for assembly and oiling. The specific process is that the gripper 425 first grabs the valve stem assembly 101 on the carrier 14 and installs it on the movable plate assembly 102, then grabs the assembly of the valve stem assembly 101 and the movable plate assembly 102 on the carrier 14 and installs it on the static plate assembly 103, and then grabs the outer shell 104 on the carrier 14 and moves it to the oil overflow head 33 of the second refueling device 3 to apply oil and then assemble it on the assembly of the valve stem assembly 101, the movable plate assembly 102 and the static plate assembly 103 to complete the assembly process.

[0073] The gripper 425 includes a gripper driving member 4251 and three clamping blocks 4252. The three clamping blocks 4252 are arranged in a circular array at the bottom end of the gripper driving member 4251. The gripper driving member 4251 is used to drive the three clamping blocks 4252 to reciprocate along the radial direction of the circular array to clamp or release the workpiece. The inner wall of each clamping block 4252 is an arc-shaped wall to fit the outer peripheral surface of the workpiece to achieve more stable clamping.

[0074] See also Figure 22 to Figure 24 The testing device 5 includes a support seat 52, a lifting and positioning assembly 53, a height limiting structure 54, a detection head 55, a workpiece clamping assembly 56 and a valve stem driving assembly 57. The lifting and positioning assembly 53 is arranged at the bottom of the support seat 52, and is used to limit the carrier 14 in the horizontal plane. The height limiting structure 54 is fixed on the support seat 52, and is used to limit the carrier 14 in the height direction. The workpiece clamping assembly 56 is arranged at the top of the support seat 52, and is used to clamp the workpiece (that is, the assembled valve core finished product) on the carrier 14. The valve stem driving assembly 57 is arranged at the top of the support seat 52, and is used to move and rotate the valve stem of the assembled valve core in different use states. The detection head 55 is movably arranged on the support seat 52, so that the detection head 55 can be moved to the bottom of the workpiece after positioning and clamping to perform an air tightness test.

[0075] The support seat 52 includes a fixed foot 521, a lower support plate 522, an upper support plate 523 and a support column 524. A plurality of fixed feet 521 are fixed to the bottom of the lower support plate 522. The lower support plate 522 and the upper support plate 523 are arranged in parallel and fixed to each other by four support columns 524. The lifting and positioning assembly 53 and the height limiting structure 54 are fixed to the lower support plate 522, and the detection head 55 is movably arranged on the lower support plate 522. The workpiece clamping assembly 56 and the valve stem driving assembly 57 are arranged on the upper support plate 523.

[0076] The lifting and positioning assembly 53 includes a lifting and positioning drive member 531, a positioning plate 532 and a positioning protrusion 533. The positioning drive member 531 is fixed on the lower support plate 522. The piston rod end of the positioning drive member 531 faces upward and is fixed with the positioning plate 532. The positioning plate 532 is located between the two conveyor belts 124 at the bottom of the carrier 14. The upper surface of the positioning plate 532 is fixed with a positioning protrusion 533. The positioning protrusion 53 is used to cooperate with the positioning hole 1410 at the bottom of the carrier 14 for positioning.

[0077] The height limiting structure 54 includes two height limiting frames relatively arranged on both sides of the lifting and positioning assembly 53, and the height limiting frames include a height limiting rod 541 and a height limiting block 542. The height limiting block 542 is fixed to the lower support plate 522 of the support seat 52 through the two height limiting rods 541, and the height limiting blocks 542 of the two height limiting frames are arranged at the same height. When installed and used, the two height limiting frames are relatively arranged on the outside of the two conveyor belts 124 at the bottom of the carrier 14, so that the lifting and positioning driving member 531 drives the positioning plate 532 and the positioning protrusion 533 to rise and hold the carrier 14 against the lower surface of the two height limiting blocks 542 for positioning. It can be understood that the positions of the two height limiting frames can also be set on the upper support plate 523 or the four support columns 524, as long as they are fixed relative to the support seat 52.

[0078] The test head 55 can be tested for air tightness by vacuuming or inflating. The test head 55 is provided with three air nozzles with openings facing upwards, so as to be sealed and connected with the hot water cavity, cold water cavity and water outlet cavity at the bottom of the valve core respectively. The test head 55 is connected with a vacuum pump through an air pipe, and each chamber of the valve core is evacuated by the vacuum pump, and the vacuum gauge is used to measure and determine whether it is qualified. Alternatively, the test head 55 is connected with an air pump through an air pipe, and each chamber of the valve core is inflated by the air pump, and the pressure sensor is used to measure and determine whether it is qualified.

[0079] The testing device 5 includes a detection head driving assembly 58 for driving the detection head 55 to move. The detection head 55 and the detection head driving assembly 58 are arranged in two sets, which are respectively located on both sides of the lifting and positioning assembly 53. The detection head driving assembly 58 includes a vertical driving member 581 and a horizontal driving member 582. The vertical driving member 581 is fixed on the lower support plate 522. The lifting end of the vertical driving member 581 faces upward and is fixed with the horizontal driving member 582. The horizontal moving end of the horizontal driving member 582 is fixed with the detection head 55. The detection head 55 can be driven to rise and fall and move horizontally by the vertical driving member 581 and the horizontal driving member 582.

[0080] The workpiece clamping assembly 56 includes a mounting frame 561, a clamping drive 562, a synchronous block 563, a pressure rod 564 and a clamping plate 565. The mounting frame 561 is fixed on the upper support plate 523. The clamping drive 562 is fixed on the mounting frame 561. The piston rod of the clamping drive 562 faces downward and is connected to the synchronous block 563. Both ends of the synchronous block 563 are installed with pressure rods 564. The two pressure rods 564 pass through the upper support plate 523 downward. The bottom ends of the two pressure rods 564 are fixedly connected by a clamping plate 565. The clamping plate 565 is located between the two height-limiting frames. In this embodiment, the clamping drive 562, the synchronous block 563, the pressure rod 564 and the clamping plate 565 are relatively arranged in two sets to clamp two workpieces at the same time.

[0081] The valve stem drive assembly 57 includes a fixed seat 571, a rotary drive member 572, a rotary chuck 573, an opening drive member 574, a closing drive member 575, a push plate 576 and a push rod 577. The fixed seat 571 is fixed to the bottom surface of the upper support plate 523. Guide sleeves are provided at the four corners of the fixed seat 571, and each pressure rod 564 is inserted into the corresponding guide sleeve. The rotary drive member 57 is fixed on the upper support plate 523 and is located between the two pressure rods 564. The rotary axis of the rotary drive member 57 faces downward and is provided with a rotary chuck 573. The rotary chuck 573 extends downward to the bottom of the fixed seat 571. A limited position opening 570 is provided on the rotary chuck 573 for the valve stem to be inserted into the limited position opening 570. A through hole is provided on the clamping plate 565 for the rotary chuck 573 to pass through. The valve stem is driven to rotate by the rotary chuck 573 to realize the switching of hot and cold water. The opening drive member 574 and the closing drive member 575 are both fixed to the bottom of the fixed seat 571. The opening drive member 574 and the closing drive member 575 are both provided with a push plate 576 that can slide back and forth. A push rod 577 is fixed on each push plate 576, which is used to push the valve stem to open or close the valve core. The push plate 576 is a U-shaped structure, and the openings of the U-shaped structure are arranged opposite to each other and staggered along the sliding direction of the push plate 576. The two protruding ends of the U-shaped structure are fixed with push rods 577 to operate the two valve cores at the same time.

[0082] When the test device 5 is in use, when the in-place detector 16 detects that the carrier 14 moves to the station where the test device 5 is located, the in-place detector 16 sends a signal to the controller, and the controller controls the blocking mechanism 17 to stop the carrier 14 from moving, and the lifting and positioning assembly 53 lifts the carrier 14 up and holds it against the height-limiting structure 54 for positioning, and the workpiece clamping assembly 56 descends to clamp the valve core on the carrier 14, and the detection head 55 moves to the bottom of the valve core, so that the three air nozzles of the detection head 55 are respectively sealed and connected with the hot water cavity, the cold water cavity and the water outlet cavity at the bottom of the valve core, and the valve stem is driven by the valve stem drive assembly 57 to be in different use states, so as to detect the air tightness of each use state. This can improve the accuracy and efficiency of air tightness detection.

[0083] The inkjet printer can be a prior art inkjet printer, which will not be described in detail herein. The sorting robot 6 can adopt the same structure as the assembling robot 42 .

[0084] The valve core automatic assembly line of the present invention further comprises a frame 7 and an electric control box 8 arranged at one end of the frame 7, and a circulating conveying device 1, a first refueling device 2, a second refueling device 3, an assembly device 4, a testing device 5, a printer and a sorting manipulator 6 are all arranged on the frame 7. An inclined placement plate 9 is provided on the frame 7 at the loading and unloading station for placing a material basket of the valve core components.

[0085] The valve core automatic assembly line of the present invention also includes a control system, which can adopt a PLC controller. The driving member and the detector mentioned in the present invention are respectively connected to the PLC controller to realize automatic control.

[0086] The valve core automatic assembly line of the present invention can realize automatic spraying of lubricating oil on certain parts of the valve core by arranging the first refueling device 2, the second refueling device 3, the assembly device 4, the testing device 5, the inkjet printer and the sorting manipulator 6 along the circulating conveying device 1, assembling the multiple valve core parts in sequence after the oil spraying, performing an air tightness test on the assembled valve core, sorting according to the air tightness test results, and automatically spraying the good valve core before conveying it to the loading and unloading station to facilitate the removal of the valve core after the coding. Only one person is required to perform the loading and unloading operation at the loading and unloading station to complete the work. In this way, the working process can simply, smoothly and quickly complete the production process of the valve core, realize the automatic production of the valve core, effectively improve the production efficiency, and effectively ensure the product quality at the same time, greatly improve the yield rate, reduce the production cost, and have good economic benefits.

[0087] The implementation schemes in the above embodiments can be further combined or replaced, and the embodiments are only descriptions of the preferred embodiments of the present invention, and do not limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various changes and improvements made to the technical solutions of the present invention by professional and technical personnel in this field all belong to the protection scope of the present invention.

Claims

1. A testing device for a valve core automatic assembly line, characterized in that: It comprises a support seat (52), a lifting and positioning assembly (53), a height limiting structure (54), a detection head (55), a workpiece clamping assembly (56) and a valve stem driving assembly (57); the lifting and positioning assembly (53) is arranged at the bottom of the support seat (52) and is used to limit the position of the carrier (14) in the horizontal plane; the height limiting structure (54) is fixed on the support seat (52) and is used to limit the position of the carrier (14) in the height direction; the workpiece clamping assembly (56) is arranged at the top of the support seat (52) and is used to clamp the workpiece on the carrier (14); the valve stem driving assembly (57) is arranged at the top of the support seat (52) and is used to move and rotate the valve stem of the assembled valve core to different use states; the detection head (55) is movably arranged on the support seat (52) so that the detection head (55) can be moved to the bottom of the workpiece after positioning and clamping to perform air tightness test; The workpiece clamping assembly (56) comprises a mounting frame (561), a clamping driving member (562), a synchronization block (563), a pressure rod (564) and a clamping plate (565); the mounting frame (561) is fixed to the top of the support seat (52); the clamping driving member (562) is fixed to the mounting frame (561); the piston rod of the clamping driving member (562) faces downward and is connected to the synchronization block (563); pressure rods (564) are installed at both ends of the synchronization block (563); the two pressure rods (564) pass downward through the top of the support seat (52); and the bottom ends of the two pressure rods (564) are fixedly connected by the clamping plate (565); The valve stem drive assembly (57) comprises a fixed seat (571), a rotary drive member (572), a rotary chuck (573), an opening drive member (574), a closing drive member (575), a push plate (576) and a push rod (577). The fixed seat (571) is fixed to the top of the support seat (52). Guide sleeves are provided at the four corners of the fixed seat (571). Each pressure rod (564) is inserted into the corresponding guide sleeve. The rotary drive member (57) is fixed to the top of the support seat (52) and is located between the two pressure rods (564). The rotary drive member (57) The rotating shaft faces downward and is provided with a rotating chuck (573), the rotating chuck (573) extends downward to below the fixed seat (571), a limited opening (570) is provided on the rotating chuck (573), a through hole is provided on the clamping plate (565) for the rotating chuck (573) to pass through, an opening driving member (574) and a closing driving member (575) are both fixed to the bottom of the fixed seat (571), and the opening driving member (574) and the closing driving member (575) are both provided with a push plate (576) that can slide back and forth, and a push rod (577) is fixed on each push plate (576).

2. The testing device for the valve core automatic assembly line according to claim 1, characterized in that: The support seat (52) comprises a fixed foot (521), a lower support plate (522), an upper support plate (523) and a support column (524); a plurality of fixed feet (521) are fixed to the bottom of the lower support plate (522); the lower support plate (522) and the upper support plate (523) are arranged in parallel and fixed to each other via a support column (524); a lifting and positioning assembly (53) and a height limiting structure (54) are fixed on the lower support plate (522); a detection head (55) is movably arranged on the lower support plate (522); and a workpiece clamping assembly (56) and a valve stem driving assembly (57) are arranged on the upper support plate (523).

3. The testing device for the valve core automatic assembly line according to claim 2, characterized in that: The lifting and positioning assembly (53) comprises a lifting and positioning driving member (531), a positioning plate (532) and a positioning protrusion (533); the positioning driving member (531) is fixed on the lower support plate (522); the piston rod end of the positioning driving member (531) faces upward and is fixed with the positioning plate (532); and the upper surface of the positioning plate (532) is fixed with the positioning protrusion (533).

4. The testing device for the valve core automatic assembly line according to claim 1, characterized in that: The height limiting structure (54) comprises two height limiting frames arranged relatively on both sides of the lifting and positioning assembly (53).

5. The testing device for the valve core automatic assembly line according to claim 4, characterized in that: The height limiting frame comprises a height limiting rod (541) and a height limiting block (542), and the height limiting block (542) is fixed on the support seat (52) through the two height limiting rods (541).

6. The testing device for the valve core automatic assembly line according to claim 1, characterized in that: The detection head (55) performs air tightness detection by vacuuming or inflating, and the detection head (55) is provided with three air nozzles with openings facing upwards.

7. The testing device for the valve core automatic assembly line according to claim 1, characterized in that: It comprises a detection head driving assembly (58) for driving the detection head (55) to move. The detection head (55) and the detection head driving assembly (58) are arranged in two sets in a relative manner and are respectively located on two sides of the lifting and positioning assembly (53).

8. The testing device for the valve core automatic assembly line according to claim 7, characterized in that: The detection head driving assembly (58) comprises a vertical driving member (581) and a horizontal driving member (582); the vertical driving member (581) is fixed to the bottom of the support seat (52); the lifting end of the vertical driving member (581) faces upward and is fixed with the horizontal driving member (582); the detection head (55) is fixed to the horizontal moving end of the horizontal driving member (582).

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