Circular conveying device

Abstract

The present invention provides a circulating conveying device, which includes a conveying frame, two sets of longitudinal conveying mechanisms, two sets of transverse conveying mechanisms, a plurality of carriers, and turning guiding structures. The two sets of longitudinal conveying mechanisms are respectively arranged in parallel on a relative side of the conveying frame, and the two sets of transverse conveying mechanisms are respectively arranged in parallel on the other relative side of the conveying frame, forming a square conveying track structure. A plurality of carriers are carried on the square conveying track structure for conveying, and are used to place and position a plurality of components of a valve core. The turning guiding structures are arranged at each corner position of the square conveying track structure to guide the carriers to turn. This circulating conveying device can achieve more flexible various sharp turning angles, making the overall structural layout more compact, capable of achieving a right-angle turn, effectively shortening the conveying stroke, and improving the conveying efficiency.

Description

Technical Field

[0001] The present invention relates to a manufacturing device for the valve core of a faucet, and particularly to a circulating conveying device. Background Art

[0002] The valve core is the core component for switching the faucet and adjusting cold and hot water. As Figure 1 、 2 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 orderly combined to form the valve core, and lubricating oil needs to be added to the moving piece assembly 102 and the static piece assembly 103 respectively during assembly. Currently, the assembly of the valve core is mostly completed through an automated assembly line. After retrieval, the following relatively close prior arts are found. For example, the invention patent with the application number CN201822083922.X discloses a large valve core assembly machine. The invention patent with the application number CN201710224951.0 discloses a faucet valve core assembly machine. The invention patent with the application number CN201821304500.4 discloses a hybrid valve core automatic assembly line. Through comparative analysis, it is found that the structures and assembly methods of the valve cores produced by different companies are not the same, and the existing automated assembly lines cannot adapt to the assembly of the valve cores of our company. Therefore, it is urgent to develop an automatic assembly line that can adapt to the valve cores of our company. The first technical problem to be solved to achieve the automatic assembly of the valve core is how to design a conveying device for conveying the valve core components. Our company specifically designs a technical solution with a different concept from the prior art to better adapt to the assembly of the valve core. Summary of the Invention

[0003] In view of the above, the present invention provides a circulating conveying device. This circulating conveying device can achieve more flexible various sharp turning angles, making the overall structural layout more compact, capable of achieving a right-angle turn, effectively shortening the conveying stroke, and improving the conveying efficiency.

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

[0005] A circulating conveying device includes a conveying frame, two sets of longitudinal conveying mechanisms, two sets of transverse conveying mechanisms, a plurality of carriers, and turning guiding structures. The two sets of longitudinal conveying mechanisms are respectively arranged in parallel on a relative side of the conveying frame, and the two sets of transverse conveying mechanisms are respectively arranged in parallel on the other relative side of the conveying frame, forming a square conveying track structure. A plurality of carriers are carried on the square conveying track structure for conveying, and are used for placing and positioning multiple components of the valve core. The turning guiding structures are arranged at each corner position of the square conveying track structure to guide the carriers to turn.

[0006] Further, it further includes a position detector, a blocking mechanism and a positioning component which are arranged at intervals, for the position detector to detect whether the carrier moves to the corresponding working station and block the carrier at the corresponding working station for positioning.

[0007] Further, the conveying frame includes a top frame and a plurality of supporting feet fixed to the top frame. The top frame is a rectangular structure formed by four side edges. Each side edge of the top frame includes two parallel supporting beams. The blocking mechanism and the positioning component are respectively fixed on the supporting beams and are located between the two supporting beams on the side edge of the top frame.

[0008] Further, the longitudinal conveying mechanism includes a driven wheel set, a driving wheel set, a supporting guide bar, a conveyor belt and a conveying driving member. The driven wheel set and the driving wheel set are respectively installed at two ends of the conveying frame. There are two sets of supporting guide bars which are fixedly arranged on the conveying frame in parallel. There are two conveyor belts which are respectively wound around the side wheels of the driven wheel set and the driving wheel set. A chute extending along the length direction is formed on the supporting guide bar. The upward running section of each conveyor belt is slidably arranged in the chute of the corresponding supporting guide bar. A guiding structure is arranged on the conveying frame. The downward running section of each conveyor belt is slidably penetrated through the guiding structure. The conveying driving member is fixed on the conveying frame and is used for driving the driving wheel set to rotate.

[0009] Further, the driven wheel set includes a driven wheel seat fixed at one end of the conveying frame and driven wheels rotatably installed on both sides of the driven wheel seat.

[0010] Further, the driving wheel set includes a driving wheel seat, a driving wheel and a tensioning wheel. The driving wheel seat is fixed at one end of the conveying frame. Driving wheels are rotatably installed on both sides of the driving wheel seat. The driving wheel is driven to rotate by the conveying driving member. Two tensioning wheels arranged vertically are rotatably installed above the driving wheel on the driving wheel seat.

[0011] Further, the carrier includes a carrier main body, a plurality of positioning seats fixed on the upper surface of the carrier main body, and four guiding columns arranged on the lower surface of the carrier main body. The lower surface of the carrier main body is supported on the upper surfaces of two parallel conveyor belts, so that when the two conveyor belts run, the carrier main body is driven to move by the friction force between the lower surface of the carrier main body and the upper surfaces of the two conveyor belts. The four guiding columns are slidably arranged in pairs on the outer sides of each supporting guide bar.

[0012] Further, the turning guiding structure includes an inner guiding member, an outer guiding member, and a transition plate. The inner guiding member is fixed to the inner side of the corner position of the conveying rack, and a guiding groove is formed on the inner guiding member. The outer guiding member is fixed to the outer side of the corner position of the conveying rack. Each outer guiding member is provided with a horizontal plane coplanar with the upper surface of the conveyor belt and an inclined plane connected to the horizontal plane. The two guiding columns on the outer side of the carrier body are elastically telescopic. The transition plate is used to fill the space between the two conveyor belts at the corner position to support the carrier to pass through when turning.

[0013] Further, the blocking mechanism includes a blocking driving member and a blocking portion fixed to the lifting end of the blocking driving member.

[0014] Further, the positioning assembly includes a positioning driving member and a positioning member. The positioning driving member is fixedly arranged below the two conveyor belts. The positioning member is arranged between the two conveyor belts in a liftable manner through the positioning driving member. A positioning hole corresponding to the positioning member is provided at the bottom of the carrier.

[0015] Advantages of the present invention:

[0016] The circulating conveying device is provided with a square conveying track structure formed by two sets of longitudinal conveying mechanisms and two sets of transverse conveying mechanisms on the conveying rack. The carrier moves along the square conveying track structure under the drive of the longitudinal conveying mechanism and the transverse conveying mechanism and under the guiding action of the turning guiding structure. In this way, the carrier can move to each working station for processing, providing an implementation basis for the realization of material conveying in production automation. By providing a plurality of in-place detectors, a plurality of blocking mechanisms, and a plurality of positioning assemblies on the conveying rack, it is convenient to automatically detect the working station reached by the carrier, block the carrier at this working station to prevent it from continuing to move, and then position the carrier through the positioning assembly for processing. After processing, the blocking mechanism releases the carrier, and the carrier continues to move to the next working station for processing. In this way, the coherent production of multiple processing steps can be realized, which is beneficial to improving the degree of production automation. This circulating conveying device can achieve more flexible various sharp turning angles, making the overall structural layout more compact, can achieve a right-angle turn, effectively shortening the conveying stroke and improving the conveying efficiency. Description of the Drawings

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

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

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

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

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

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

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

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

[0025] Figure 9 It is the partial enlarged drawing of the longitudinal conveying mechanism of the valve core automatic assembly line of the present invention;

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

[0027] Figure 11 It is the three-dimensional view of the carrier of the circulating conveying device of the valve core automatic assembly line of the present invention;

[0028] Figure 12 It is the front view of the carrier of the circulating conveying device of the valve core automatic assembly line of the present invention;

[0029] Figure 13 It is the bottom view of the carrier of the circulating conveying device of the valve core automatic assembly line of the present invention;

[0030] Figure 14 It is the three-dimensional view of the first oil filling device of the valve core automatic assembly line of the present invention;

[0031] Figure 15 It is the partial front view of the first oil filling device of the valve core automatic assembly line of the present invention;

[0032] Figure 16 It is the partial enlarged drawing of the first oil filling device of the valve core automatic assembly line of the present invention;

[0033] Figure 17 It is the three-dimensional view of the second oil filling device of the valve core automatic assembly line of the present invention;

[0034] Figure 18 It is the three-dimensional view of the assembly device of the valve core automatic assembly line of the present invention;

[0035] Figure 19 It is the front view of the positioning and clamping mechanism of the assembly device of the valve core automatic assembly line of the present invention;

[0036] Figure 20 This is a cross-sectional view of the positioning and clamping mechanism of the valve core automatic assembly line of the present invention;

[0037] Figure 21 This is a three-dimensional view of the gripper of the assembly device of the valve core automatic assembly line of the present invention;

[0038] Figure 22 This is a three-dimensional view of the testing device of the valve core automatic assembly line of the present invention;

[0039] Figure 23 This is the front view of the testing device of the valve core automatic assembly line of the present invention;

[0040] Figure 24 This is a partial enlarged view of the testing device of the valve core automatic assembly line of the present invention. Specific embodiments

[0041] Next, in combination with the drawings in the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described. 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] Please refer to 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 static piece assembly 103, and a housing 104 into a valve core. The valve core automatic assembly line includes a circulating conveying device 1, a first lubricating oil adding device 2, a second lubricating oil adding device 3, an assembly device 4, a testing device 5, an inkjet printer (not shown in the figure), and a sorting manipulator 6. The circulating conveying device 1 is used to circulate and convey multiple components of the valve core to each working station. The first lubricating oil adding device 2, the second lubricating oil adding device 3, the assembly device 4, the testing device 5, the inkjet printer, and the sorting manipulator 6 are arranged in sequence along the conveying direction of the circulating conveying device 1 ( Figure 4 the arrow direction in is the conveying direction). The first lubricating oil adding device 2 and the second lubricating oil adding device 3 are respectively used to spray lubricating oil on different components of the valve core. Specifically, the first lubricating oil adding device 2 is used to spray lubricating oil on the moving piece assembly 102 and the static piece assembly 103, and the second lubricating oil adding device 3 is used to spray lubricating oil on the housing 104. The assembly device 4 is used to assemble the components of the valve core after spraying lubricating oil. The testing device 5 is used to perform airtightness testing on the assembled valve core, and feedback the test results to the sorting manipulator 6, so that the sorting manipulator 6 can grab the qualified valve cores to the inkjet printer for inkjet coding and then put them back on the circulating conveying device 1 for continuous conveying, and grab the defective valve cores to the corresponding recycling containers. The position between the first lubricating oil adding device 2 and the sorting manipulator 6 is the loading and unloading station, for placing multiple components of the valve core on the circulating conveying device 1 and removing the qualified valve cores after inkjet coding.

[0043] Please refer to Figures 5 to 10, the loop conveyor device 1 includes a conveyor frame 11, two sets of longitudinal conveyor mechanisms 12, two sets of transverse conveyor 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 conveyor mechanisms 12 are respectively arranged in parallel on a relative side of the conveyor frame 11, and the two sets of transverse conveyor mechanisms 13 are respectively arranged in parallel on the other relative side of the conveyor frame 11, forming a square conveyor track structure. The plurality of carriers 14 are carried on the square conveyor track structure for conveying, and are used to place and position multiple components of the valve core. The turning guide structure 15 is arranged at each corner position of the square conveyor track structure to guide the carriers 14 to turn. The plurality of in-position detectors 16 and the plurality of blocking mechanisms 17 are arranged at each work station. Positioning assemblies 18 are provided at the loading and unloading work station, the first oil filling device 2, and the sorting manipulator 6 work stations. Special positioning devices are provided at the second oil filling device 3, the assembly device 4, and the testing device 5 work stations for the in-position detectors 16 to detect whether the carriers 14 move to the corresponding work stations and block the carriers 14 at the corresponding work stations for positioning.

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

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

[0046] The conveyor frame 11 includes a top frame 111 and a plurality of support feet 112 fixed to the top frame 111. The top frame 111 is a rectangular structure formed by four side edges, and each side edge 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 side edge of the top frame 111. It can be understood that each side edge of the top frame 111 can also adopt one 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 set 121, a driving wheel set 122, support guide bars 123, conveyor belts 124 and a conveying driving member 125. The driven wheel set 121 and the driving wheel set 122 are respectively installed at both ends of the top frame 111. There are two sets of support guide bars 123, which are respectively fixed on 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 fixedly arranged in parallel on the same support beam 113. Both ends of the support guide bars 123 respectively extend to the positions of the driven wheel set 121 and the driving wheel set 122. There are two conveyor belts 124, which are respectively wound around the side wheels of the driven wheel set 121 and the driving wheel set 122. A chute extending along the length direction is formed on the support guide bars 123, and the ascending section of each conveyor belt 124 is slidably arranged in the chute of the corresponding support guide bar 123. A guiding structure extending along the length direction of the support beam 113 is arranged on the support beam 113. Preferably, the guiding structure is a guiding hole 130 ( Figure 20 as shown), and the descending section of each conveyor belt 124 is slidably inserted into the guiding hole 130. The conveying driving member 125 is fixed at one end of the top frame 111 close to the driving wheel set 122, and is used to drive the driving wheel set 122 to rotate. The rotation of the driving wheel set 122 drives the driven wheel set 121 to rotate through the two conveyor belts 124.

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

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

[0050] The structure of the transverse conveying mechanism 13 is basically 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 vehicle 14 includes a vehicle body 141, a plurality of positioning seats 142 fixed on the upper surface of the vehicle body 141 for placing valve core components, and four guide posts 143 provided on the lower surface of the vehicle body 141. The four guide posts 143 are arranged in a rectangle. The lower surface of the vehicle body 141 is supported on the upper surfaces of two parallel conveyor belts 124, so that when the two conveyor belts 124 run, the vehicle body 141 can be driven to move by the frictional force between the lower surface of the vehicle body 141 and the upper surfaces of the two conveyor belts 124. The four guide posts 143 are slidably arranged in pairs on the outer sides of each support guide bar 123, that is, two guide posts 143 are correspondingly provided on the outer side of each support guide bar 123. The vehicle body 141 maintains a linear motion along the direction of the conveyor belt 124 under the guiding action of the four guide posts 143, so as to avoid the vehicle body 141 deviating to its two sides and causing poor operation. Preferably, the vehicle body 141 includes a slider 1411, a connecting column 1412 and a bearing plate 1413. The slider 1411 is slidably arranged on the two conveyor belts 124. The slider 1411 and the bearing plate 1413 are arranged in parallel, and the slider 1411 and the bearing plate 1413 are fixedly connected by 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. A guide groove 150 is formed on the inner guide member 151, and the guide groove 150 adopts a circular right-angle groove. There are two outer guide members 152, which are fixedly arranged at intervals on the outer side of the corner position of the top frame 111. The distance between the two outer guide members 152 is equivalent to the distance between the two guide posts 143 on the outer side of the vehicle body 141. Each outer guide member 152 is provided with a horizontal plane 1522 in the same plane as the upper surface of the conveyor belt 124 and an inclined plane 1521 connected to the horizontal plane 1522. The two guide posts 143 on the outer side of the vehicle body 141 are elastically telescopic. When the vehicle 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 vehicle 14 sequentially hit the inclined planes 1521 of the two outer guide members 152 and expand and contract, and then move to the horizontal planes 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 for the vehicle 14 to pass through when turning.

[0053] It can be understood that only one outer guide member 152 can also be provided, as long as the length of the outer guide member 152 extending along the conveying direction is equivalent to the distance between the two telescopic guide posts 143 on the outer side of the vehicle body 141.

[0054] It can be understood that the guide groove 150 can also adopt a circular obtuse angle groove or a circular acute angle groove, so as to achieve an obtuse or acute angle turn. Compared with the semi-circular track turning conveying device of the prior art, the present circulating conveying device 1 can achieve more flexible various sharp turning angles, making the overall structural layout more compact. When a right-angle turn is adopted, the conveying stroke is effectively shortened and the conveying efficiency is improved.

[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, and the blocking portion 172 is disposed between the two support beams 113 on the side frame of the top frame 111 in a liftable manner for blocking or releasing the carrier 14 that can move along the conveying direction above the two support beams 113. 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 driving member 181 and a positioning member 182. The positioning driving member 181 is fixedly disposed below between the two conveyor belts 124, and the positioning member 182 is disposed between the two conveyor belts 124 in a liftable manner through the positioning driving member 181. A positioning hole 1410 corresponding to the positioning member 182 is provided at the bottom of the carrier 14, that is, at the bottom of the slider 1411, for the positioning member 182 to be inserted into the positioning hole 1410 when rising to achieve 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 adopt air cylinders. In addition, other telescopic driving devices can also be used.

[0058] It can be understood that the circulating conveying device 1 can be applied to various technical fields that need to achieve conveying.

[0059] The loop conveyor device 1 is provided with a square conveyor track structure formed by two sets of longitudinal conveyor mechanisms 12 and two sets of transverse conveyor mechanisms 13 on the conveyor rack 11. The carrier 14 moves along the square conveyor track structure under the drive of the longitudinal conveyor mechanism 12 and the transverse conveyor mechanism 13 and under the guiding action of the turning guiding structure 15. In this way, the carrier 14 can move to each working station for processing, providing a basis for the realization of material conveying for production automation. By arranging a plurality of in-place detectors 16, a plurality of blocking mechanisms 17 and a plurality of positioning components 18 on the conveyor rack 11, it is convenient to automatically detect the working station reached by the carrier 14, block the carrier 14 at this working station to prevent it from continuing to move, and then position the carrier 14 through the positioning component 18 for processing. After processing, the blocking mechanism 17 releases the carrier 14, and the carrier 14 continues to move to the next working station for processing. In this way, the coherent production of multiple processing steps can be realized, which is beneficial to improving the degree of production automation.

[0060] Please refer to Figures 14 to 16 , the first oil filling device 2 includes a support portion 21, a slide table module 22, a lifting drive member 23, a connecting seat 24, a fuel injection pump 25, an injection nozzle 26, a first oil tank 27 ( Figure 3 ), and an oil receiving device 28. The slide table module 22 is horizontally fixed on the support portion 21. The lifting drive member 23 is fixed on the horizontal sliding portion of the slide table module 22. The connecting seat 24 is fixed on the lifting end of the lifting drive member 23. The fuel injection pump 25 is fixed above the connecting seat 24. The injection nozzle 26 is fixed below the connecting seat 24. The fuel injection pump 25 is communicated with the first oil tank 27 through a suction pipe. The injection nozzle 26 is connected to the fuel injection pump 25, so that the lubricating oil sucked out from the first oil tank 27 by the fuel injection pump 25 is intermittently ejected downward through the injection nozzle 26, and then the lubricating oil is sprayed on the valve core component of the carrier 14. In this embodiment, there are two injection nozzles 26 for simultaneously filling oil for two valve core components, and finally two valve core finished products can be assembled from one carrier 14. The oil receiving device 28 is arranged on the slide table module 22 to receive the excess lubricating oil overflowing from the injection nozzle 26 when moving below the injection nozzle 26. This can prevent the 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 block 231, a piston rod 232, a guide post 233, a lifting block 234 and a synchronizing rod 235. The piston rod 232 is telescopically arranged in the cylinder block 231. Through holes are provided on both sides of the piston rod 232 on the cylinder block 231. A guide post 233 is slidably arranged in each through hole. The tops of the two guide posts 233 are connected with a synchronizing rod 235. The bottoms of the two guide posts 233 and the piston rod 232 are both connected to the lifting block 234. The connecting seat 24 is fixed on the lifting block 234.

[0062] Since the heights of the moving blade assembly 102 and the stationary blade assembly 103 are inconsistent, it is necessary to separately control the height of the oil injection head 26 when refueling these two components. The first refueling device 2 further includes a limit assembly 29 provided at the top end of the cylinder block 231 for providing two different limit heights for the movement of the synchronous rod 2353. The limit assembly 29 includes a guide rail base 291, a guide slider 292, a limit driving member 293, a first limit portion 294, a second limit portion 295 and a push rod 296. The guide rail base 291 is fixed to the top end of the cylinder block 231. The guide slider 292 is slidably disposed on the guide rail base 291. The limit driving member 293 is fixed to the guide rail base 291. The first limit portion 294 and the second limit portion 295 are oppositely disposed on the guide slider 292 and are located at both ends of the sliding direction of the guide slider 292. The heights of the first limit portion 294 and the second limit portion 295 are not equal. The push rod 296 is disposed downward on the synchronous rod 235. When the limit driving member 293 drives the guide slider 292 to slide, the first limit portion 294 or the second limit portion 295 is driven to abut against the push rod 296 to achieve different limit heights. It can be understood that the push rod 296 can also be omitted, and only the heights of the first limit portion 294 and the second limit portion 295 need to be increased, and the synchronous rod 235 directly abuts against the first limit portion 294 or the second limit portion 295 for limiting.

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

[0064] Preferably, the slide table module 22 can be implemented by an existing screw electric slide table, and the lifting driving member 23 can be a cylinder.

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

[0066] Preferably, the oil receiving container 282 is communicated with the first oil tank 27 through a recovery pipe, so that the lubricating oil in the oil receiving container 282 flows into the first oil tank 27 for reuse.

[0067] The first oil filling device 2 is configured by cooperating a sliding table module 22, a lifting driving member 23, a connecting seat 24, a fuel injection pump 25, an injection nozzle 26, and a first oil tank 27 on a support portion 21. The sliding table module 22 and the lifting driving member 23 can drive the fuel injection pump 25 and the injection nozzle 26 to move to the valve core component of the vehicle 14 for automatic fuel injection, and the lubricating oil can be continuously supplied through the first oil tank 27. This can achieve rapid fuel injection of the valve core component and a uniform fuel injection effect.

[0068] Please refer to Figure 17 , the second oil filling device 3 includes a support 31, a fuel pump 32, an oil overflow head 33, and a second oil tank 34 ( Figure 3 ), the fuel pump 32 is fixed on the support 31, the oil overflow head 33 is arranged upward and connected to the fuel pump 32, and the fuel pump 32 is communicated with the second oil tank 34 through an oil suction pipe, so that the lubricating oil in the second oil tank 34 can be pumped out by the fuel pump 32 and intermittently overflow from the oil overflow head 33.

[0069] Please refer to Figures 18 to 21 , the assembling device 4 is arranged close to the second oil filling device 3 so that these two processing steps can be completed at the same station. The assembling device 4 includes a positioning and clamping mechanism 41 and an assembling manipulator 42. The positioning and clamping mechanism 41 includes a base 411, guide rods 412, a lifting seat 413, a jacking driving member 414, a clamping seat 415, and positioning columns 416. Guide rods 412 are fixedly erected at the four corner positions of the top surface of the base 411. The lifting seat 413 is slidably sleeved on the four guide rods 412. The jacking driving member 414 is fixed on the base 411, and the jacking rod of the jacking driving member 414 is connected to the lifting seat 413 to drive the lifting seat 413 to lift. Clamping seats 415 are fixed at the tops of two guide rods 412 on each side. During installation and use, the two clamping seats 415 are arranged oppositely on both sides of the longitudinal conveying mechanism 12. Two positioning columns 416 are erected on both sides of the lifting seat 413. The bearing plate 1413 of the vehicle 14 is wider than the slider 1411, and both sides of the bearing plate 1413 extend from both sides of the slider 1411 respectively. Limiting holes 1414 ( Figure 13 ) are opened on the extended side parts of the bearing plate 1413, so that the positioning columns 416 on both sides of the lifting seat 413 can be inserted into the corresponding limiting holes 1414 when rising to limit the position of the vehicle 14, and the continuous rising of the positioning columns 416 after positioning the vehicle 14 can drive the vehicle 14 to rise and be clamped between the positioning columns 416 and the clamping seats 415.

[0070] The lifting seat 413 includes a lifting plate 4131 and sliding sleeves 4132 fixed at the four corner positions of the lifting plate 4131. The guide rods 412 slide through 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 Figures 22 to 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 base 52 includes fixing feet 521, a lower support plate 522, an upper support plate 523 and support columns 524. A plurality of fixing 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 pressing 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 driving member 531, a positioning plate 532 and a positioning projection 533. The positioning driving member 531 is fixed to 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. The positioning plate 532 is located between two conveyor belts 124 at the bottom of the carrier 14. The positioning projection 533 is fixed to the upper surface of the positioning plate 532, and the positioning projection 533 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 oppositely arranged on both sides of the lifting and positioning assembly 53. The height limiting frame includes 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 base 52 by two height limiting rods 541. The height limiting blocks 542 of the two height limiting frames are arranged at the same height. During installation and use, the two height limiting frames are oppositely arranged outside 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 projection 533 to rise and lift the carrier 14 to abut against the lower surfaces 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 arranged on the upper support plate 523 or the four support columns 524, as long as they are fixedly arranged relative to the support base 52.

[0078] The detection head 55 can perform airtightness detection by means of vacuum pumping or inflation. Three air nozzles with upward openings are provided on the detection head 55 for respectively sealing and communicating with the hot water chamber, the cold water chamber and the water outlet chamber at the bottom of the valve core. A vacuum pump is connected to the detection head 55 through an air pipe. The vacuum pump evacuates the various chambers of the valve core, and the vacuum gauge is used to measure and judge whether it is qualified. Or, an air pump is connected to the detection head 55 through an air pipe. The air pump inflates the various chambers of the valve core, and the pressure sensor is used to measure and judge whether it is qualified.

[0079] The test device 5 includes a probe driving component 58 for driving the movement of the probe 55. There are two sets of the probe 55 and the probe driving component 58, which are respectively arranged on both sides of the lifting and positioning component 53. The probe driving component 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 probe 55. The probe 55 can be driven to lift and move horizontally by the vertical driving member 581 and the horizontal driving member 582.

[0080] The workpiece pressing component 56 includes a mounting frame 561, a pressing driving member 562, a synchronous block 563, a pressing rod 564 and a pressing plate 565. The mounting frame 561 is fixed on the upper support plate 523. The pressing driving member 562 is fixed on the mounting frame 561. The piston rod of the pressing driving member 562 faces downward and is connected with the synchronous block 563. The two ends of the synchronous block 563 are both provided with pressing rods 564. The two pressing rods 564 pass through the upper support plate 523 downward. The bottom ends of the two pressing rods 564 are fixedly connected through the pressing plate 565. The pressing plate 565 is located between the two height limit frames. In this embodiment, there are two sets of the pressing driving member 562, the synchronous block 563, the pressing rod 564 and the pressing plate 565 to press two workpieces simultaneously.

[0081] The valve stem driving component 57 includes a fixed seat 571, a rotary driving member 572, a rotary chuck 573, an opening driving member 574, a closing driving member 575, a push plate 576 and a push rod 577. The fixed seat 571 is fixed on the bottom surface of the upper support plate 523. Guide sleeves are provided at the four corner positions of the fixed seat 571. Each pressing rod 564 is inserted into the corresponding guide sleeve. The rotary driving member 57 is fixed on the upper support plate 523 and is located between the two pressing rods 564. The rotary shaft of the rotary driving member 57 faces downward and is provided with a rotary chuck 573. The rotary chuck 573 extends downward to below the fixed seat 571. A limit port 570 is opened on the rotary chuck 573 for the valve stem to be inserted into the limit port 570. A through hole is opened on the pressing plate 565 for the rotary chuck 573 to pass through. The rotation of the valve stem is driven by the rotation of the rotary chuck 573 to realize the switching of cold and hot water. The opening driving member 574 and the closing driving member 575 are both fixed on the bottom of the fixed seat 571. The opening driving member 574 and the closing driving member 575 are both provided with a reciprocating sliding push plate 576. Each push plate 576 is fixed with a push rod 577, which is respectively used to push the valve stem to open or close the valve core. The push plate 576 is in a U-shaped structure. The openings of the U-shaped structures are arranged oppositely and are offset along the sliding direction of the push plate 576. The two extending ends of the U-shaped structure are both fixed with push rods 577 to operate two valve cores simultaneously.

[0082] When the testing device 5 is in use, when the in-place detector 16 detects that the vehicle 14 moves to the station where the testing device 5 is located, the in-place detector 16 sends a signal to the controller, and the controller controls the blocking mechanism 17 to block the vehicle 14 from moving. The lifting and positioning assembly 53 lifts the vehicle 14 and abuts against the height-limiting structure 54 for positioning. The workpiece pressing assembly 56 descends to press the valve core located on the vehicle 14. 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 in sealed communication with the hot water chamber, the cold water chamber and the water outlet chamber at the bottom of the valve core. The valve stem driving assembly 57 drives the valve stem to be in different use states, so as to detect the airtightness of each use state. This can improve the accuracy and efficiency of airtightness detection.

[0083] The inkjet printer can adopt the inkjet printers disclosed in the prior art, which will not be elaborated here. The sorting manipulator 6 can adopt the same structure as the assembly manipulator 42.

[0084] The valve core automatic assembly line of the present invention further includes a frame 7 and an electric control box 8 arranged at one end of the frame 7. The circulating conveyor 1, the first lubricating oil adding device 2, the second lubricating oil adding device 3, the assembly device 4, the testing device 5, the inkjet printer and the sorting manipulator 6 are all arranged on the frame 7. An inclined placing plate 9 is arranged on the frame 7 at the loading and unloading station for placing the material baskets of the valve core parts.

[0085] The valve core automatic assembly line of the present invention further includes a control system. The control system can adopt a PLC controller. The driving parts and detectors mentioned in the present invention are respectively connected to the PLC controller to realize automatic control.

[0086] For the valve core automatic assembly line of the present invention, by cooperating with the first lubricating oil adding device 2, the second lubricating oil adding device 3, the assembly device 4, the testing device 5, the inkjet printer and the sorting manipulator 6 arranged along the circulating conveyor 1, it is possible to automatically spray lubricating oil on some parts of the valve core, sequentially assemble multiple valve core parts after oil spraying, perform airtightness testing on the assembled valve core, sort according to the airtightness testing results, automatically spray code on the qualified valve cores and then convey them to the loading and unloading station for easy removal of the valve cores after spraying code. Only one person needs to perform the loading and unloading operations at the loading and unloading station to complete the work. Such a 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, ensure the product quality effectively, greatly improve the qualified 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 only describe the preferred embodiments of the present invention, and do not limit the concept and scope of the present invention. Without departing from the design idea of the present invention, various changes and improvements made by those skilled in the art to the technical solutions of the present invention all belong to the protection scope of the present invention.

Claims

1. A cyclic conveying device, comprising a conveying frame (11), characterized in that, it further comprises two sets of longitudinal conveying mechanisms (12), two sets of transverse conveying mechanisms (13), a plurality of carriers (14), a turning guide structure (15). The two sets of longitudinal conveying mechanisms (12) are respectively arranged in parallel on a relative side of the conveying frame (11), and the two sets of transverse conveying mechanisms (13) are respectively arranged in parallel on the other relative 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 for placing and positioning 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; it further comprises a position detector (16), a blocking mechanism (17) and a positioning assembly (18) which are arranged at intervals, so that the position detector (16) can detect whether the carrier (14) moves to the corresponding station and block the carrier (14) at the corresponding station for positioning; the carrier (14) comprises a carrier body (141), a plurality of positioning seats (142) fixed on the upper surface of the carrier body (141), and four guide columns (143) arranged on the lower surface of the carrier body (141). 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) run, the carrier body (141) is driven to move by the friction force between the lower surface of the carrier body (141) and the upper surfaces of the two conveyor belts (124). The four guide columns (143) are slidably arranged in pairs on the outside of each support guide bar (123); the turning guide structure (15) comprises 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 conveying frame (11), and a guide groove (150) is formed on the inner guide member (151). The outer guide member (152) is fixed to the outer side of the corner position of the conveying frame (11). Each outer guide member (152) is provided with a horizontal plane (1522) on the same plane as the upper surface of the conveyor belt (124) and an inclined plane (1521) connected to the horizontal plane (1522). The two guide columns (143) on the outside of the carrier body (141) are elastically telescopic. 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; the blocking mechanism (17) comprises a blocking driving member (171) and a blocking portion (172) fixed to the lifting end of the blocking driving member (171); the positioning assembly (18) comprises a positioning driving member (181) and a positioning member (182). The positioning driving member (181) is fixedly arranged below the two conveyor belts (124), and the positioning member (182) is arranged between the two conveyor belts (124) in a liftable manner through the positioning driving member (181). A positioning hole (1410) corresponding to the positioning member (182) is arranged at the bottom of the carrier (14).

2. The circulating conveying device according to claim 1, wherein, the conveying frame (11) includes a top frame (111) and a plurality of support feet (112) fixed to the top frame (111). The top frame (111) is a rectangular structure formed by four side edges. Each side edge of the top frame (111) includes two parallel support beams (113). The blocking mechanism (17) and the positioning component (18) are respectively fixed on the support beams (113) and are located between the two support beams (113) on the side edge of the top frame (111).

3. The circulating conveying device according to claim 1, wherein, the longitudinal conveying mechanism (12) includes a driven wheel set (121), a driving wheel set (122), support guide bars (123), a conveyor belt (124) and a conveying driving member (125). The driven wheel set (121) and the driving wheel set (122) are respectively installed at both ends of the conveying frame (11). There are two sets of support guide bars (123) which are fixedly arranged on the conveying frame (11) in parallel. There are two conveyor belts (124) which are respectively wound around the side wheels of the driven wheel set (121) and the driving wheel set (122). The support guide bars (123) are provided with chutes extending along the length direction. The ascending section of each conveyor belt (124) is slidably arranged in the chute of the corresponding support guide bar (123). The conveying frame (11) is provided with a guiding structure. The descending section of each conveyor belt (124) is slidably passed through the guiding structure. The conveying driving member (125) is fixed on the conveying frame (11) and is used for driving the driving wheel set (122) to rotate.

4. The circulating conveying device according to claim 3, wherein, the driven wheel set (121) includes a driven wheel seat (1211) fixed at one end of the conveying frame (11) and driven wheels (1212) rotatably installed on both sides of the driven wheel seat (1211).

5. The circulating conveying device according to claim 3, wherein, the driving wheel set (122) includes a driving wheel seat (1221), a driving wheel (1222) and a tensioning wheel (1223). The driving wheel seat (1221) is fixed at one end of the conveying frame (11). The driving wheels (1222) are rotatably installed on both sides of the driving wheel seat (1221). The driving wheels (1222) are driven to rotate by the conveying driving member (125). Two tensioning wheels (1223) arranged vertically are rotatably installed above the driving wheels (1222) on the driving wheel seat (1221).

Images