Caster assembly equipment and caster production line

Abstract

The present invention provides a caster assembly device and a caster production line, which relate to the technical field of caster production equipment, wherein the caster assembly device comprises a frame, a material shifting device arranged on the frame, and a first hole reaming device, an assembly device, and a second hole reaming device arranged in sequence; the frame comprises a conveying track provided with a limiting sliding edge. The caster assembly device conveys the parts to be assembled on the conveying track through the material shifting device, and in the first assembly position, the first hole reaming device performs preliminary hole reaming on the hollow cavity of the hollow pin shaft, and in the second assembly position, the lower fixed hole component maintains the inner diameter of the hollow cavity of the hollow pin shaft, and the upper pressure edge component makes the rotating plate tightly fit with the upper ring of the first bearing, and in the third assembly position, the second hole reaming device performs secondary hole reaming on the hollow cavity of the hollow pin shaft, so that the outer diameter of the hollow pin shaft is tightly matched with the inner ring of the second bearing, thereby ensuring the assembly accuracy of the first bearing and the second bearing, saving time and labor, and facilitating the improvement of assembly efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of caster production equipment, and in particular to caster assembly equipment and a caster production line. Background Art

[0002] Among all kinds of universal wheels, there is a universal wheel with double bearings. This universal wheel has two bearings installed on the steering shaft, one is a thrust bearing that bears axial loads, and the other is a radial bearing that bears radial loads. For example, the double-bearing universal wheel disclosed in the Chinese utility model patent with publication number CN201951171U includes an upright steering shaft, the upper part of the steering shaft is sleeved with a radial bearing, and the lower part of the steering shaft is sleeved with a thrust bearing. The radial bearing and the thrust bearing are located in the bearing mounting hole of a bearing seat, and the bearing mounting hole is a stepped hole, and the upper end face of the thrust bearing is against the first step of the stepped hole. However, this universal wheel structure is time-consuming and laborious in the process of assembling the two bearings on the steering shaft, and the assembly efficiency is low; moreover, the two bearings need to meet the assembly tolerance requirements during the assembly process. If the assembly tolerance requirements are not met, their service life will be affected.

[0003] Therefore, it is urgent to improve the universal wheel structure and develop corresponding assembly equipment to improve assembly efficiency and reduce production costs. Summary of the invention

[0004] Based on this, in order to solve the above problems, the present invention provides a caster assembly device and a caster production line, and its specific technical solution is as follows:

[0005] On the one hand, a caster assembly device comprises a frame, a material shifting device arranged on the frame, and a first reaming device, an assembly device, and a second reaming device arranged in sequence; the frame comprises a conveying track provided with a limit sliding edge, and the conveying track is provided with a material discharge position, a first assembly position, a second assembly position, a third assembly position, and a material discharge position in sequence; the material shifting device comprises a material shifting component and a positioning component, and the material shifting component comprises a material shifting seat, at least four material shifting jigs arranged at intervals on the material shifting seat, a conveying and shifting component driving the material shifting seat to move along the conveying direction of the conveying track, and a conveying and shifting component driving the conveying and shifting component perpendicular to the conveying direction of the conveying track. The conveying track moves a horizontal material moving component in the conveying direction, and the positioning component includes three positioning components respectively arranged at a first assembly position, a second assembly position, and a third assembly position; the first reaming device is used for preliminarily reaming the hollow cavity of the hollow pin shaft, and the assembly device includes a lower fixed hole component and an upper pressure edge component, the lower fixed hole component is used to maintain the inner diameter of the hollow cavity of the hollow pin shaft, and the upper pressure edge component is used to tightly fit the rotating plate on the outer ring of the first bearing; the second reaming device is used for secondary reaming of the hollow cavity of the hollow pin shaft, so that the outer diameter of the hollow pin shaft is tightly matched with the inner ring of the second bearing.

[0006] The above-mentioned caster assembly equipment conveys the parts to be assembled on the conveying track through the material moving device. At the first assembly position, the first reaming device performs preliminary reaming on the hollow cavity of the hollow pin shaft. At the second assembly position, the lower fixed hole component maintains the inner diameter of the hollow cavity of the hollow pin shaft, and the upper pressure edge component tightly fits the rotating plate with the upper ring of the first bearing. At the third assembly position, the second reaming device performs secondary reaming on the hollow cavity of the hollow pin shaft to make the outer diameter of the hollow pin shaft tightly fit with the inner ring of the second bearing, thereby ensuring the assembly accuracy of the first bearing and the second bearing, saving time and effort, and facilitating improving assembly efficiency.

[0007] Further, the first hole expanding device includes a first lower fixed cavity component and a first upper punching and expanding component; the first lower fixed cavity component includes a positioning seat, and a first lower driving component for driving the positioning seat to perform an upward movement; the first upper punching and expanding component includes a punching and expanding seat, a first upper driving component for driving the punching and expanding seat to perform an upward movement, a first punching and expanding unit arranged on the punching and expanding seat, an auxiliary driving component arranged on the punching and expanding seat, and a clamping sleeve arranged at the output end of the auxiliary driving component.

[0008] Further, the lower fixed hole component includes an assembly lifting component and an expanding and punching component, the expanding and punching component includes an expanding and punching seat, an expanding and punching disc, a plurality of expanding and punching units spaced apart on the expanding and punching disc, and an expanding and punching driving unit for driving the expanding and punching unit to move closer to or away from the center of the expanding and punching disc, and the expanding and punching unit is provided with an expanding and punching convex edge adapted to the hollow cavity; the upper pressure edge component includes an assembly lower pressure component and a clamping component, the clamping component includes a clamping seat, a clamping disc, a plurality of clamping units spaced apart on the clamping disc, and a clamping driving unit for driving the clamping unit to move closer to or away from the center of the clamping disc, and the clamping unit is provided with a clamping concave edge adapted to the outer wall of the rotating plate.

[0009] Furthermore, the expanding disc is provided with a plurality of limiting arc grooves arranged at intervals along the center of the circle; the expanding seat includes an expanding base and an expanding top seat, the expanding top seat is provided with a plurality of expanding sliding grooves arranged at intervals along the center of the circle, the expanding drive unit includes an expanding slider adapted to the expanding sliding groove, and an expanding working block arranged perpendicular to the expanding slider; the expanding slider is provided with a sliding portion adapted to the limiting arc groove, and the expanding convex edge is arranged on the expanding working block.

[0010] Further, the second reaming device includes a downward pressing fixing component and a second reaming component; the second reaming component includes a second reaming assembly, the second reaming assembly includes a reaming cylinder provided with a circular hole cavity, a plurality of reaming blocks arranged on the reaming cylinder, a reaming driving member for driving the reaming blocks to move along the center line of the circular hole cavity, and an upper limit unit and a lower limit unit arranged in the circular hole cavity; the reaming blocks are provided with an reaming convex edge, and an upper limit portion and a lower limit portion arranged above and below the reaming convex edge; the reaming cylinder is provided with spaced-apart avoidance grooves, and the reaming convex edge can pass through the avoidance grooves and protrude from the outer cylinder surface of the reaming cylinder; the upper limit unit is used to limit the upper limit portion to be stuck in the circular hole cavity, and the lower limit unit is used to limit the lower limit portion to be stuck in the circular hole cavity; the downward pressing fixing component includes a downward pressing driving assembly for driving the second reaming assembly to move downward.

[0011] Furthermore, the first assembly position, the second assembly position, the third assembly position and the material unloading position are arranged at intervals of a first distance value, and the interval distance value between adjacent material transfer fixtures is equal to the first distance value.

[0012] On the other hand, a caster production line includes a loading device, a stamping device, a welding device, a material transfer robot and a caster assembly device; the loading device is used to combine the various parts of the caster into parts to be assembled; the material transfer robot includes a first robot and a second robot, the first robot is used to transfer the parts to be assembled from the loading device to the caster assembly device, and the second robot is used to transfer the rotating unit from the caster assembly device to the stamping device; the stamping device is used to press the mounting plate onto the rotating unit and assemble it into a rotating seat; the welding equipment includes a welding device and a welding robot, the welding robot is used to transfer the rotating seat to the welding device, and the welding device is used to weld the rotating seat and the wheel frame into a caster.

[0013] Furthermore, the stamping equipment includes a conveying device and a stamping device; the stamping device includes a working platform, a feeding component and a stamping component, the working platform includes a work table body, and a rotating drive assembly for driving the work table body to rotate, and the work table body is provided with at least a loading station, a feeding station, a stamping station and an unloading station; the conveying device is used to place the parts to be assembled on the loading station of the work table body; the feeding component is used to place the mounting plate on the rotating unit of the feeding station; the stamping component is used to press the mounting plate onto the rotating unit and assemble it into a rotating seat.

[0014] Furthermore, the feeding component includes a placing cylinder, a first pushing assembly arranged below the placing cylinder, a guide cylinder, and a second pushing assembly; a plurality of mounting plates are stacked in the placing cylinder; the first pushing assembly pushes a single mounting plate to the top of the guide cylinder, and the second pushing assembly pushes the mounting plate above the guide cylinder into the guide cylinder, and the mounting plate is placed on the rotating unit through the guide cylinder.

[0015] Furthermore, the welding device includes a welding robot and a platform component, the platform component includes a welding base, a rotating platform, a rotating drive component that drives the rotating platform to rotate relative to the welding base, and a welding fixture arranged on the rotating platform; the welding robot is used to perform welding on the rotating seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention can be further understood from the following description in conjunction with the accompanying drawings. The components in the figures are not necessarily drawn to scale, but the emphasis is placed on illustrating the principles of the embodiments. In different views, the same reference numerals designate corresponding parts.

[0017] Figure 1 is a structural cross-sectional view of a rotating seat according to an embodiment of the present invention;

[0018] Figure 2 is a structural exploded view of a novel universal wheel according to an embodiment of the present invention;

[0019] Figure 3 is a structural schematic diagram of a caster assembly device according to an embodiment of the present invention;

[0020] Figure 4 is a cross-sectional view of the structure of the caster assembly device according to one embodiment of the present invention Figure 1 ;

[0021] Figure 5 is a cross-sectional view of the structure of the caster assembly device according to one embodiment of the present invention Figure 2 ;

[0022] Figure 6 is a structural cross-sectional view of a lower fixed hole component according to an embodiment of the present invention;

[0023] Figure 7 This is a cross-sectional view of the structure of the upper pressure edge component according to an embodiment of the present invention. Figure 1 ;

[0024] Figure 8 This is a cross-sectional view of the structure of the upper pressure edge component according to an embodiment of the present invention. Figure 2 ;

[0025] Fig. 9 is a structural cross-sectional view of the second hole expansion assembly according to an embodiment of the present invention;

[0026] Fig.10 It is a structural schematic diagram of a caster production line according to an embodiment of the present invention;

[0027] Fig.11 is a schematic structural diagram of a stamping device according to an embodiment of the present invention;

[0028] Fig.12 is a structural cross-sectional view of a feeding component in a punching device according to an embodiment of the present invention;

[0029] Fig.13 It is a structural cross-sectional view of a welding device according to an embodiment of the present invention.

[0030] Description of reference numerals:

[0031] 200, rotating unit; 201, limiting plate; 202, hollow pin shaft; 203, first bearing; 204, rotating plate; 205, second bearing;

[0032] 300, mounting plate; 400, rotating seat; 500, wheel frame;

[0033] 1. Frame; 2. Material transfer device; 3. First hole expansion device; 4. Assembly device; 5. Second hole expansion device; 6. Loading equipment; 7. Stamping equipment; 8. Welding equipment; 9. Material transfer manipulator; 100. Caster assembly equipment;

[0034] 11. Conveying track; 101. Limiting sliding edge;

[0035] 21. Material moving parts; 22. Positioning parts;

[0036] 211, material transfer seat; 212, material transfer fixture; 213, material transfer assembly; 214, horizontal material transfer assembly;

[0037] 221. Positioning component;

[0038] 31. first lower fixed cavity component; 32. first upper punching and expanding component; 33. positioning seat; 34. first lower driving assembly; 35. punching and expanding seat; 36. first upper driving assembly; 37. first punching and expanding unit; 38. auxiliary driving member; 39. pressing sleeve;

[0039] 41. Lower fixed hole component; 42. Upper pressing edge component; 43. Assemble lifting component; 44. Expanding and punching component; 45. Assemble lower pressing component; 46. Buckling component;

[0040] 441, expansion seat; 442, expansion disc; 443, expansion unit; 444, expansion drive unit; 445, limiting arc groove; 446, expansion slider; 447, expansion work block;

[0041] 461, buckling seat; 462, buckling disc; 463, buckling unit; 464, buckling drive unit; 465, driving arc groove; 466, buckling slider; 467, expansion and punching work block;

[0042] 4411, expand the base; 4412, expand the top seat; 4413, expand the sliding groove;

[0043] 4611, buckle the base; 4612, buckle the top seat; 4613, buckle the sliding groove;

[0044] 51. Pressing down and fixing component; 52. Second hole expanding component; 53. Pressing down and driving component; 54. Second hole expanding component; 55. Second lower fixing hole component;

[0045] 541, expansion cylinder; 542, expansion block; 543, expansion drive member; 544, upper limit unit; 545, lower limit unit;

[0046] 5421, expansion convex edge; 5422, upper limit portion; 5423, lower limit portion;

[0047] 71. Conveying device; 72. Punching device; 73. Material placing cylinder; 74. First material pushing assembly; 75. Guide cylinder; 76. Second material pushing assembly;

[0048] 721, working platform; 722, feeding component; 723, stamping component; 724, working platform body; 725, rotating drive assembly;

[0049] 81. Welding device; 82. Welding manipulator; 83. Welding manipulator arm; 84. Platform component;

[0050] 841. welding base; 842. rotating platform; 843. rotating driving component; 844. welding fixture;

[0051] 91. First manipulator; 92. Second manipulator. DETAILED DESCRIPTION

[0052] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with its embodiments. It should be understood that the specific implementation methods described herein are only used to explain the present invention and do not limit the scope of protection of the present invention.

[0053] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0054] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0055] The “first” and “second” in the present invention do not represent specific quantities and orders, but are merely used to distinguish names.

[0056] On the one hand, if Figure 3 and Figure 4 As shown, a caster assembly device in one embodiment of the present invention comprises a frame 1, a material moving device 2 arranged on the frame 1, and a first reaming device 3, an assembly device 4, and a second reaming device 5 arranged in sequence; the frame 1 comprises a conveying track 11 provided with a limiting sliding edge 101, and the conveying track 11 is provided with a material discharge position, a first assembly position, a second assembly position, a third assembly position and a material discharge position in sequence; the material moving device 2 comprises a material moving component 21 and a positioning component 22, and the material moving component 21 comprises a material moving seat 211, at least four material moving jigs 212 arranged at intervals on the material moving seat 211, a conveying and moving component 213 for driving the material moving seat 211 to move along the conveying direction of the conveying track 11, and a driving conveying and moving component 213 is a horizontal material moving component 214 that moves perpendicular to the conveying direction of the conveying track 11. The positioning component 22 includes three positioning components 221 respectively arranged at the first assembly position, the second assembly position, and the third assembly position; the first reaming device 3 is used to perform preliminary reaming of the hollow cavity of the hollow pin shaft 202, and the assembly device 4 includes a lower fixed hole component 41 and an upper pressure edge component 42. The lower fixed hole component 41 is used to maintain the inner diameter of the hollow cavity of the hollow pin shaft 202, and the upper pressure edge component 42 is used to tightly fit the rotating plate 204 on the outer ring of the first bearing 203; the second reaming device 5 is used to perform secondary reaming of the hollow cavity of the hollow pin shaft 202, so that the outer diameter of the hollow pin shaft 202 is tightly matched with the inner ring of the second bearing 205.

[0057] like Figure 1 and Figure 2As shown, by improving the structure and optimizing the process of the universal wheel, the universal wheel is decomposed into a rotating seat 400 and a wheel frame 500, and the rotating seat 400 is decomposed into a mounting plate 300 and a rotating unit 200, and the rotating unit 200 includes a limit plate 201, a hollow pin shaft 202, a first bearing 203, a rotating plate 204, a second bearing 205 and other parts. However, since the assembly clearance in the rotating unit 200 needs to meet the matching tolerance requirements, the first bearing 203 and the second bearing 205 are kept in stable rotation by the rotor in subsequent use to ensure their service life, the limit plate 201, the first bearing 203, the rotating plate 204, and the second bearing 205 are sequentially fitted on the hollow pin shaft 202 to assemble the rotating unit 200, and it is best to adjust the assembly clearance of the rotating unit 200, and then install the mounting plate 300 on the rotating unit 200, and then fix it with the wheel frame 500 through a welding process, so as to assemble a new universal wheel. The universal wheel has a simple structure and strong continuous operability during the actual production process, which is convenient for reducing assembly time.

[0058] The above-mentioned caster assembly equipment conveys the parts to be assembled on the conveying track 11 through the material moving device 2. At the first assembly position, the first reaming device 3 performs preliminary reaming on the hollow cavity of the hollow pin shaft 202. At the second assembly position, the lower fixed hole component 41 maintains the inner diameter of the hollow cavity of the hollow pin shaft 202, and the upper pressure edge component 42 makes the rotating plate 204 tightly fit the upper ring of the first bearing 203. At the third assembly position, the second reaming device 5 performs secondary reaming on the hollow cavity of the hollow pin shaft 202 to make the outer diameter of the hollow pin shaft 202 tightly fit with the inner ring of the second bearing 205, thereby ensuring the assembly accuracy of the first bearing 203 and the second bearing 205, saving time and effort, and facilitating the improvement of assembly efficiency.

[0059] like Figure 3 and Figure 5As shown, in one embodiment, the first reaming device 3 includes a first lower fixed cavity component 31 and a first upper punching and expanding component 32; the first lower fixed cavity component 31 includes a positioning seat 33, and a first lower driving assembly 34 driving the positioning seat 33 to ascend; the first upper punching and expanding component 32 includes a punching and expanding seat 35, a first upper driving assembly 36 driving the punching and expanding seat 35 to ascend, a first punching and expanding unit 37 disposed on the punching and expanding seat 35, an auxiliary driving member 38 disposed on the punching and expanding seat 35, and a clamping sleeve 39 disposed at the output end of the auxiliary driving member 38. Specifically, the clamping sleeve 39 is provided with a pressing portion adapted to the part to be assembled. In this way, the clamping sleeve 39 is driven by the auxiliary driving component 38, so that the clamping sleeve 39 presses the part to be assembled on the conveying track 11, and the first upper driving component 36 drives the expanding end of the first expanding unit 37 to penetrate into the hollow cavity of the hollow pin shaft 202. The outer shaft wall of the hollow pin shaft 202 is deformed outward as the expanding end squeezes the inner shaft wall, and the inner plate hole of the limit plate 201 is expanded due to the close contact with the outer shaft wall of the hollow pin shaft 202. The outer plate wall of the limit plate 201 is deformed outward due to the expansion of the inner plate hole, and the outer plate wall of the limit plate 201 is tightly matched with the lower circle of the first bearing 203 to achieve the preset matching tolerance size.

[0060] like Figure 3 and Figure 4 , Figure 6 , Figure 7 , Figure 8 As shown, in one embodiment, the assembly device 4 includes a lower fixed hole component 41 and an upper pressure edge component 42; the lower fixed hole component 41 includes an assembly lifting component 43, and an expansion component 44, the expansion component 44 includes an expansion seat 441, an expansion disk 442 arranged on the expansion seat 441, a plurality of expansion units 443 arranged at intervals on the expansion disk 442, and an expansion drive unit 444 driving the expansion unit 443 to move closer to or away from the center of the expansion disk 442, and the expansion unit 443 is provided with a convex edge for expanding and punching that fits the hollow cavity; the upper pressing edge component 42 includes an assembly lower pressing component 45, and a pressing component 46, the pressing component 46 includes a pressing seat 461, a pressing disc 462 arranged on the pressing seat 461, a plurality of pressing units 463 arranged at intervals on the pressing disc 462, and a pressing driving unit 464 for driving the pressing unit 463 to move closer to or away from the center of the pressing disc 462, and the pressing unit 463 is provided with a pressing concave edge for fitting the outer wall of the rotating plate 204. Specifically, the expanding and punching driving unit 444 can drive the expanding and punching unit 443 to move closer to or away from the center of the expanding and punching disc 442; the pressing driving unit 464 can drive the pressing unit 463 to move closer to or away from the center of the pressing disc 462.

[0061] Among them, the working process of the assembly device 4 is as follows: first, the assembly lifting component 43 drives the expanding and punching component 44 to move upward, so that the expanding and punching convex edge on the expanding and punching unit 443 is inserted into the hollow cavity of the hollow pin shaft 202; at the same time, the assembly pressing component 45 drives the pressing component 46 to move downward, and the pressing concave edge on the pressing unit 463 is close to or even fits to the outer wall of the rotating plate 204. Then, the expanding and punching unit 443 is driven away from the center of the expanding and punching disk 442 by the expanding and punching driving unit 444, and the expanding and punching convex edge on the expanding and punching unit 443 touches the inner shaft wall of the hollow cavity of the hollow pin shaft 202, and the expanding and punching unit 443 can be in close contact with the inner shaft wall of the hollow cavity of the hollow pin shaft 202 to keep the hollow pin shaft 202 in a fixed state; at the same time, the pressing driving unit 464 drives the pressing unit 463 to approach the center of the pressing disk 462, and the pressing concave edge on the pressing unit 463 touches the outer wall of the rotating plate 204, and the outer wall of the rotating plate 204 is deformed inwardly, and the inner wall of the rotating plate 204 is deformed inwardly due to the pressing of the outer wall, and the inner wall of the rotating plate 204 is tightly matched with the upper circle of the first bearing 203 to achieve a preset matching tolerance size.

[0062] In one embodiment, the expansion disk 442 is provided with a plurality of limit arc grooves 445 arranged at intervals along the center of the circle; the expansion seat 441 includes an expansion base 4411 and an expansion top seat 4412, the expansion top seat 4412 is provided with a plurality of expansion sliding grooves 4413 arranged at intervals along the center of the circle, the expansion unit 443 includes an expansion slider 446 adapted to the expansion sliding groove 4413, and an expansion work block 447 arranged perpendicular to the expansion slider 446; the expansion slider 446 is provided with a sliding portion adapted to the limit arc groove 445, and the expansion convex edge is arranged on the expansion work block 447. In this way, the expansion disk 442 is driven to rotate by the expansion drive unit 444, and the sliding portion of the expansion slider 446 performs a curved motion in the limit arc groove 445, and the limit function of the expansion sliding groove 4413 is utilized to make the expansion work block 447 approach or move away from the center of the expansion base 4411 along the expansion sliding groove 4413.

[0063] In one embodiment, the pressing disc 462 is provided with a plurality of driving arc grooves 465 spaced along the center of the circle; the pressing seat 461 includes a pressing base 4611 and a pressing top seat 4612, the pressing top seat 4612 is provided with a plurality of pressing sliding grooves 4613 spaced along the center of the circle, the pressing unit 463 includes a pressing slider 466 adapted to the pressing sliding groove 4613, and a pressing work block 467 arranged on the pressing slider 466; the pressing slider 466 is provided with a sliding portion adapted to the driving arc groove 465, and the pressing concave edge is arranged on the pressing work block 467. In this way, the pressing disc 462 is driven to rotate by the pressing driving unit 464, the sliding portion of the pressing slider 466 performs a curved motion in the driving arc groove 465, and the limiting function of the pressing sliding groove 4613 is utilized to make the pressing work block 467 approach or move away from the center of the pressing base 4611 along the pressing sliding groove 4613.

[0064] like Figure 3 and Fig. 9 As shown, in one embodiment, the second reaming device 5 includes a downward pressing fixing component 51 and a second reaming component 52; the second reaming component 52 includes a second reaming assembly 54, and the second reaming assembly 54 includes a reaming cylinder 541 provided with a circular hole cavity, a plurality of reaming blocks 542 arranged on the reaming cylinder 541, a reaming driving member 543 for driving the reaming blocks 542 to move along the center line of the circular hole cavity, and an upper limit unit 544 and a lower limit unit 545 arranged in the circular hole cavity; the reaming block 542 is provided with a reaming flange 542 1. An upper limit portion 5422 and a lower limit portion 5423 are arranged above and below the reaming convex edge 5421; the reaming cylinder 541 is provided with spaced-apart avoidance grooves, and the reaming convex edge 5421 can pass through the avoidance grooves and protrude from the outer cylinder surface of the reaming cylinder 541; the upper limit unit 544 is used to limit the upper limit portion 5422 to be stuck in the circular hole cavity, and the lower limit unit 545 is used to limit the lower limit portion 5423 to be stuck in the circular hole cavity; the downward pressing fixing component 51 includes a downward pressing driving component 53 for driving the second reaming component 54 to move downward. In this way, the reaming drive 543 drives the reaming block 542 to move along the center line of the circular hole of the reaming cylinder 541, so that the reaming convex edge 5421 can pass through the air avoidance groove and protrude from the outer cylinder surface of the reaming cylinder 541, squeeze and expand the hollow cavity of the hollow pin shaft 202, and then deform the hollow pin shaft 202, so that the outer wall of the hollow pin shaft 202 is in close contact with the inner ring of the second bearing 205.

[0065] In one embodiment, the pressing and fixing component 51 further includes a pressing and fixing seat and a second lower fixed hole assembly 55, and the second hole expansion assembly 54 is arranged on the pressing and fixing seat; the second lower fixed hole assembly 55 includes a third driving cylinder and a pressing and fixing seat sleeved on the periphery of the hole expansion cylinder 541, and the lower bottom surface of the pressing and fixing seat is provided with a limiting groove edge adapted to the outer ring of the second bearing 205. In this way, after the pressing and driving assembly 53 drives the second hole expansion assembly 54 to move downward, the third driving cylinder drives the pressing and fixing seat to press against the outer ring of the second bearing 205, and the limiting groove edge contacts the limiting groove edge to achieve a considerable fixation of the second bearing 205.

[0066] In one embodiment, the first assembly position, the second assembly position, the third assembly position and the material unloading position are arranged at intervals of a first distance value, and the interval distance value between adjacent material transfer jigs 212 is equal to the first distance value. By using four material transfer jigs 212 arranged at intervals on the material transfer seat 211, the four material transfer jigs 212 are used to move the workpieces on different stations to the next station respectively, and the structure is simple and reliable, which is convenient for improving production efficiency.

[0067] The specific working principle of caster assembly equipment is as follows:

[0068] The parts to be assembled on the discharge position of the conveying track 11 are conveyed to the first assembly position by the material moving device 2, and the first reaming device 3 performs preliminary reaming on the hollow cavity of the hollow pin shaft 202; the parts to be assembled on the first assembly position of the conveying track 11 are conveyed to the second assembly position by the material moving device 2, the lower fixed hole component 41 maintains the inner diameter of the hollow cavity of the hollow pin shaft 202, and the upper pressure edge component 42 makes the rotating plate 204 tightly fit the upper ring of the first bearing 203; the parts to be assembled on the second assembly position of the conveying track 11 are conveyed to the third assembly position by the material moving device 2, and the second reaming device 5 performs secondary reaming on the hollow cavity of the hollow pin shaft 202, so that the outer diameter of the hollow pin shaft 202 is tightly matched with the inner ring of the second bearing 205, thereby assembling into the rotating unit 200.

[0069] On the other hand, Fig.10As shown, a caster production line in one embodiment of the present invention includes a feeding device 6, a stamping device 7, a welding device 8, a material transfer robot 9 and a caster assembly device 100; the feeding device 6 is used to combine the various parts of the caster into parts to be assembled; the material transfer robot 9 includes a first robot 91 and a second robot 92, the first robot 91 is used to transfer the parts to be assembled from the feeding device 6 to the caster assembly device 100, and the second robot 92 is used to transfer the rotating unit 200 from the caster assembly device 100 to the stamping device 7; the stamping device 7 is used to press the mounting plate 300 onto the rotating unit 200 and assemble it into a rotating seat 400; the welding equipment 8 includes a welding device 81 and a welding robot 82, the welding robot 82 is used to transfer the rotating seat 400 to the welding device 81, and the welding device 81 is used to weld the rotating seat 400 and the wheel frame 500 into a caster.

[0070] like Fig.11 As shown, in one embodiment, the stamping equipment 7 includes a conveying device 71 and a stamping device 72; the stamping device 72 includes a working platform 721, a feeding component 722 and a stamping component 723, the working platform 721 includes a working table body 724, and a rotating drive assembly 725 for driving the working table body 724 to rotate, the working table body 724 is provided with at least a loading station, a feeding station, a stamping station and an unloading station; the conveying device 71 is used to place the parts to be assembled on the loading station of the working table body 724; the feeding component 722 is used to place the mounting plate 300 on the rotating unit 200 of the feeding station; the stamping component 723 is used to press the mounting plate 300 onto the rotating unit 200 and assemble it into a rotating seat 400.

[0071] like Fig.12 As shown, in one embodiment, the feeding component 722 includes a material placement cylinder 73, a first material pushing assembly 74 disposed below the material placement cylinder 73, a guide cylinder 75, and a second material pushing assembly 76; a plurality of mounting plates 300 are stacked in the material placement cylinder 73. Thus, a single mounting plate is pushed onto the top of the guide cylinder 75 by the first material pushing assembly 74, and the second material pushing assembly 76 pushes the mounting plate above the guide cylinder 75 into the guide cylinder 75, and the mounting plate 300 is placed on the rotating unit 200 through the guide cylinder 75.

[0072] like Fig.13 As shown, in one embodiment, the welding device 81 includes a welding robot arm 83 and a platform component 84, the platform component 84 includes a welding base 841, a rotating platform 842, a rotating driving component 843 that drives the rotating platform 842 to rotate relative to the welding base 841, and a welding fixture 844 arranged on the rotating platform 842; the welding robot arm 83 is used to perform welding on the rotating seat 400.

[0073] In one embodiment, the loading device 6 includes a loading track, a pushing component, and a first loading component, a second loading component, a third loading component and a fourth loading component arranged in sequence; the loading track is sequentially provided with a conveying starting end, a first loading position, a second loading position, a third loading position, a fourth loading position and a conveying end; the first loading component is used to convey the limit plate 201 with the hollow pin shaft 202 to the conveying starting end, the second loading component is used to place the first bearing 203 on the hollow pin shaft 202, the third loading component is used to place the rotating plate 204 on the first bearing 203, and the fourth loading component is used to place the second bearing 205 on the rotating plate 204. Specifically, the pushing component includes two groups of pushing assemblies, the pushing assemblies include a pushing seat, four pushing fixtures spaced apart on the pushing seat, a lifting pushing unit driving the pushing seat to perform lifting and lowering movements, a conveying pushing unit driving the lifting pushing unit to move along the conveying direction of the loading track, and a horizontal pushing unit driving the conveying pushing unit to move perpendicular to the conveying direction of the loading track; the first loading position, the second loading position, the third loading position, the fourth loading position and the conveying end are spaced apart by a first distance value, and the interval value between adjacent pushing fixtures is equal to the first distance value.

[0074] The specific working principle of the caster production line is as follows:

[0075] The loading device 6 combines the various parts of the caster into parts to be assembled; the first manipulator 91 transfers the parts to be assembled from the loading device 6 to the caster assembly device 100, and the caster assembly device 100 assembles the parts to be assembled into a rotating unit 200 that meets the assembly tolerance requirements, and the second manipulator 92 transfers the rotating unit 200 from the caster assembly device 100 to the stamping device 7; the stamping device 7 presses the mounting plate 300 onto the rotating unit 200 and assembles it into a rotating seat 400; the welding manipulator 82 transfers the rotating seat 400 to the welding device 81, and the welding device 81 welds the rotating seat 400 and the wheel frame 500 into a caster.

[0076] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0077] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A caster assembly device, characterized in that: It includes a frame, a material moving device arranged on the frame, and a first hole expanding device, an assembly device, and a second hole expanding device arranged in sequence; The frame comprises a conveying track provided with a limit sliding edge, and the conveying track is provided with a material discharge position, a first assembly position, a second assembly position, a third assembly position and a material discharge position in sequence; The material moving device comprises a material moving component and a positioning component, wherein the material moving component comprises a material moving seat, at least four material moving jigs arranged at intervals on the material moving seat, a conveying material moving component driving the material moving seat to move along the conveying direction of the conveying track, and a horizontal material moving component driving the conveying material moving component to move perpendicularly to the conveying direction of the conveying track, and the positioning component comprises three positioning components respectively arranged at a first assembly position, a second assembly position, and a third assembly position; The first hole-expanding device is used to perform preliminary hole-expanding on the hollow cavity of the hollow pin shaft, and the assembly device comprises a lower hole-fixing component and an upper pressure edge component, wherein the lower hole-fixing component is used to maintain the inner diameter of the hollow cavity of the hollow pin shaft, and the upper pressure edge component is used to tightly fit the rotating plate onto the outer ring of the first bearing; The second hole-expanding device is used to perform secondary hole-expanding on the hollow cavity of the hollow pin shaft so that the outer diameter of the hollow pin shaft is closely matched with the inner ring of the second bearing; the first hole-expanding device includes a first lower fixed cavity component and a first upper punch-expanding component; The first lower fixed cavity component includes a positioning seat and a first lower driving assembly for driving the positioning seat to perform an ascending action; The first upper punching and expanding component includes a punching and expanding seat, a first upper driving component for driving the punching and expanding seat to perform an ascending action, a first punching and expanding unit arranged on the punching and expanding seat, an auxiliary driving component arranged on the punching and expanding seat, and a clamping sleeve arranged at the output end of the auxiliary driving component; the lower fixed hole component includes an assembly lifting component and a punching and expanding component, the punching and expanding component includes a punching and expanding seat, a punching and expanding disc, a plurality of punching and expanding units arranged on the punching and expanding disc at intervals, and a punching and expanding driving unit driving the punching and expanding units to move closer to or farther from the center of the punching and expanding disc, and the punching and expanding units are provided with a punching and expanding convex edge adapted to the hollow cavity; The upper pressing edge component includes an assembly lower pressing component and a buckling component, the buckling component includes a buckling seat, a buckling disc, a plurality of buckling units spaced apart on the buckling disc, and a buckling driving unit driving the buckling unit to move closer to or farther from the center of the buckling disc, and the buckling unit is provided with a buckling concave edge adapted to the outer wall of the rotating plate; The second hole expanding device includes a pressing and fixing component and a second hole expanding component; The second hole expanding component comprises a second hole expanding assembly, which comprises a hole expanding cylinder provided with a circular hole cavity, a plurality of hole expanding blocks arranged on the hole expanding cylinder, a hole expanding driving member for driving the hole expanding blocks to move along the center line of the circular hole cavity, and an upper limit unit and a lower limit unit arranged in the circular hole cavity; The hole expansion block is provided with a hole expansion convex edge, and an upper limit portion and a lower limit portion arranged above and below the hole expansion convex edge; The reaming cylinder is provided with spaced-apart avoidance grooves, and the reaming convex edge can pass through the avoidance grooves and protrude from the outer cylinder surface of the reaming cylinder; The upper limit unit is used to limit the upper limit portion to be stuck in the circular hole cavity, and the lower limit unit is used to limit the lower limit portion to be stuck in the circular hole cavity; The downward pressing and fixing component includes a downward pressing driving assembly for driving the second hole expanding assembly to move downward; The parts to be assembled on the discharge position of the conveying track are conveyed to the first assembly position by the material moving device, and the first reaming device performs preliminary reaming on the hollow cavity of the hollow pin shaft; the parts to be assembled on the first assembly position of the conveying track are conveyed to the second assembly position by the material moving device, the lower fixed hole component maintains the inner diameter of the hollow cavity of the hollow pin shaft, and the upper pressure edge component makes the rotating plate tightly fit the upper ring of the first bearing; the parts to be assembled on the second assembly position of the conveying track are conveyed to the third assembly position by the material moving device, and the second reaming device performs secondary reaming on the hollow cavity of the hollow pin shaft to make the outer diameter of the hollow pin shaft tightly fit with the inner ring of the second bearing.

2. A caster assembly device according to claim 1, characterized in that: The expansion disc is provided with a plurality of limit arc grooves arranged at intervals along the center of the circle; The expansion seat comprises an expansion base and an expansion top seat, the expansion top seat is provided with a plurality of expansion sliding grooves arranged at intervals along the center of a circle, the expansion drive unit comprises an expansion slider adapted to the expansion sliding groove, and an expansion working block arranged perpendicular to the expansion slider; The expansion and punching sliding block is provided with a sliding portion adapted to the limiting arc groove, and the expansion and punching convex edge is arranged on the expansion and punching working block.

3. The caster assembly device according to claim 1, characterized in that: The first assembly position, the second assembly position, the third assembly position and the material unloading position are arranged at intervals of a first distance value, and the interval distance value between adjacent material transfer fixtures is equal to the first distance value.

4. A caster production line, characterized in that: It comprises a feeding device, a stamping device, a welding device, a material transfer robot and the caster assembly device according to any one of claims 1 to 3; The caster comprises a rotating seat and a wheel frame, the rotating seat comprises a mounting plate and a rotating unit, and the rotating unit comprises a limiting plate, a hollow pin shaft, a first bearing, a rotating plate and a second bearing; The feeding equipment comprises a feeding track, a pushing component, and a first feeding component, a second feeding component, a third feeding component and a fourth feeding component which are arranged in sequence; the feeding track is provided with a conveying start end, a first feeding position, a second feeding position, a third feeding position, a fourth feeding position and a conveying end end in sequence; the first feeding component is used to convey the limit plate with the hollow pin shaft to the conveying start end, the second feeding component is used to place the first bearing on the hollow pin shaft, the third feeding component is used to place the rotating plate on the first bearing, and the fourth feeding component is used to place the second bearing on the rotating plate, so that the limit plate, the hollow pin shaft, the first bearing, the rotating plate and the second bearing are combined into a component to be assembled; The material transfer robot comprises a first robot and a second robot, wherein the first robot is used to transfer the parts to be assembled from the loading device to the caster assembly device, and the second robot is used to transfer the rotating unit from the caster assembly device to the stamping device; The punching equipment is used to press the mounting plate onto the rotating unit and assemble it into a rotating seat; The welding equipment comprises a welding device and a welding manipulator, wherein the welding manipulator is used to transfer the rotating seat to the welding device, and the welding device is used to weld the rotating seat and the wheel frame into a caster.

5. A caster production line according to claim 4, characterized in that: The stamping equipment includes a conveying device and a stamping device; The punching device comprises a working platform, a feeding component and a punching component, wherein the working platform comprises a working platform body and a rotation driving assembly for driving the working platform body to rotate, wherein the working platform body is provided with at least a loading station, a feeding station, a punching station and a unloading station; The conveying device is used to place the parts to be assembled on the loading station of the workbench body; The feeding component is used to place the mounting plate onto the rotating unit of the feeding station; The stamping component is used to press the mounting plate onto the rotating unit and assemble it into a rotating seat.

6. A caster production line according to claim 5, characterized in that: The feeding component includes a material placing cylinder, a first material pushing assembly arranged below the material placing cylinder, a guide cylinder, and a second material pushing assembly; A plurality of mounting plates are stacked in the material placing barrel; The first pushing assembly pushes a single mounting plate onto the top of the guide cylinder, and the second pushing assembly pushes the mounting plate above the guide cylinder into the guide cylinder, and the mounting plate is placed onto the rotating unit through the guide cylinder.

7. A caster production line according to claim 4, characterized in that: The welding device comprises a welding manipulator and a platform component, wherein the platform component comprises a welding base, a rotating platform, a rotating driving component for driving the rotating platform to rotate relative to the welding base, and a welding fixture arranged on the rotating platform; The welding manipulator is used to perform welding action on the rotating seat.

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