Conveyor equipment for long-distance variable-pitch picking and buffering

Abstract

The present invention is a conveying device for long-distance variable-spacing picking and caching, comprising a plurality of conveying chains arranged in a straight line and a plurality of logistics vehicles, the logistics vehicles are moved by being pulled by the conveying chains, and a plurality of traction mechanisms are installed on each conveying chain, the traction mechanism comprising a bracket, the bottom of the bracket is fixedly connected to the chain link of the circulating chain, a traction pin is hinged on the bracket, the traction pin rotates in a vertical plane, a baffle is provided on one side of the traction pin on the bracket, the baffle makes the traction pin rotate only in the conveying direction, and a tension spring is installed between the baffle and the traction pin; the logistics vehicle comprises a frame, the front end and the rear end of the frame are each provided with a hanging point, the hanging point cooperates with the traction pin to drive the logistics vehicle to move along the conveying chain, the distance between the two hanging points is greater than the spacing between two adjacent conveying chains, so that the logistics vehicle can cross adjacent conveying chains; the present invention greatly reduces the labor intensity of personnel, the equipment is simpler, easy to maintain, and has strong expandability.

Description

Technical Field

[0001] The invention relates to the technical field of automobile assembly line picking, in particular to a conveying device for long-distance variable-spacing picking and caching. Background Art

[0002] With the introduction of Toyota Production System in the automotive industry, the SPS (Set Parts System) distribution method of assembly workshop logistics has received great attention. Toyota joint ventures, Volkswagen joint ventures and General Motors joint ventures are vigorously promoting and applying it. The SPS distribution method is a method of distributing goods according to the assembly volume of each vehicle.

[0003] Taking the final assembly workshop as an example, under the guidance of the information control system, the logistics system enables the pickers to methodically take out the required parts from the shelves in the picking area and place them on the logistics equipment. They are then delivered to the designated production line station (full of materials) according to the SPS distribution method, and run along the main line to the designated station (empty of materials) before returning to the picking area for re-picking.

[0004] The picking area is generally designed to be slender due to the large variety of materials, and personnel pick on both sides of the logistics equipment. The traditional way to move logistics equipment in the picking area is to rely on manual pulling, which has the problems of high labor intensity, low picking efficiency, and easy mistakes and omissions. Another way is to set multiple stop points in the picking area, and rely on AGV logistics equipment to pull the logistics equipment at the stop point to wait for manual picking to be completed and then press the release button to go to the next picking point. AGV logistics equipment cannot run at an extremely low speed of less than 1m / min, and can only adopt a step-by-step picking process. There is a problem of discontinuous picking, and the distance between equipment cannot be dynamically adjusted. At the same time, the AGV equipment is too expensive, and requires regular charging, which will take up picking time. It is not ideal for fast-paced, multi-category picking.

[0005] The final assembly line is generally in the form of ground skateboard lines, plate chain lines, aerial friction conveyor lines, accumulation chains, EMS, etc. Usually, interfaces are reserved on the assembly line, and hanging devices are arranged on the logistics equipment. When the logistics equipment arrives at the designated location, the equipment is hung with the assembly line through the automatic loading and unloading device, and the equipment is driven to move synchronously by the power of the assembly line. There are complex transfer processes, which require secondary development of assembly lines and logistics equipment, and poor reliability. If the logistics equipment is not synchronized with the main line normally, it often causes line stoppage and losses. Summary of the invention

[0006] The purpose of the present invention is to solve the problems existing in the above-mentioned prior art and to provide a conveying device for long-distance variable-pitch picking and caching.

[0007] The specific scheme of the present invention is: a conveying device for long-distance variable-spacing picking and caching, comprising a plurality of conveying chains arranged in a straight line and a plurality of logistics vehicles, the logistics vehicles are moved by being pulled by the conveying chains, a power end and a driven end are respectively provided at both ends of each conveying chain, a sprocket is provided at the power end and the driven end, a circulating chain is installed between the power end and the driven end, a plurality of traction mechanisms are installed on the circulating chain, the traction mechanism comprises a bracket, the bottom of the bracket is fixedly connected to the chain link of the circulating chain, a traction pin is hinged on the bracket, the traction pin rotates in a vertical plane, a baffle is provided on one side of the traction pin on the bracket, the baffle makes the traction pin rotate only in the conveying direction, and a tension spring is installed between the baffle and the traction pin; the logistics vehicle comprises a frame, a hanging point is respectively provided at the front end and the rear end of the frame, the hanging point cooperates with the traction pin to drive and push the logistics vehicle to move along the conveying chain, the distance between the two hanging points is greater than the spacing between two adjacent conveying chains, so that the logistics vehicle can cross adjacent conveying chains.

[0008] Furthermore, the power end includes a base, a driving shaft is mounted on the base, the driving shaft is connected to a driving mechanism, both ends of the driving shaft are rotatably connected to the base, and two driving sprockets are mounted in the middle of the driving shaft; the driven end includes a base, a driven shaft is provided on the base, and a driven sprocket is mounted on the driven shaft corresponding to each of the two driving sprockets, and a circulating chain is wound around each driving sprocket and the corresponding driven sprocket.

[0009] Furthermore, a plurality of supporting ends are provided between the power end and the driven end, the supporting end includes a fixed bracket, and a group of chain supports are respectively provided at the upper and lower ends of the fixed bracket, and each group of chain supports has two chain supports, and the circulating chain moves in the corresponding chain supports.

[0010] Furthermore, two guide rails are symmetrically mounted on both sides of the top of the support end, and a guide wheel is mounted on the frame of the logistics vehicle corresponding to each of the two guide rails.

[0011] Furthermore, a through channel is provided at the bottom of the frame of the logistics vehicle in the left-right direction, a guide slide is provided in the channel, an AGV mounting plate is provided on the left or right side of the frame, and the guide slide is used to align the traction shaft of the AGV with the AGV mounting plate.

[0012] Furthermore, the bottoms of the power end, the support end and the driven end are all provided with adjusting bolts, and the adjusting bolts are used to adjust the height so that the circulating chain moves along a horizontal straight line.

[0013] Furthermore, the logistics vehicle is provided with four rollers at the bottom, at least two of which are universal rollers.

[0014] Compared with the prior art, the present invention has the following advantages: 1. It overcomes the shortcomings of the prior art, fully utilizes the site space without affecting the operation of personnel to realize the automatic operation of the logistics vehicle, and can configure multiple conveying equipment according to the length of the picking area / assembly line to realize the extension of the conveying line;

[0015] 2. The motor frequency conversion speed regulation and multi-stage deceleration can achieve stable operation of the line at 1m / min;

[0016] 3. It can be installed outside the picking area and the assembly line, without affecting the picking in the picking area and without requiring the reserved equipment interface of the assembly line. It is easy to install, greatly reducing the labor intensity of personnel, making the equipment simpler, more maintainable, and highly expandable. The conveying equipment can be extended directly to become the main production line, without the need to excavate the ground, only the ground needs to be leveled. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a top view schematic diagram of the present invention;

[0018] Figure 2 It is a schematic diagram of the state in which the logistics vehicle of the present invention moves to the end of the first conveying chain;

[0019] Figure 3 It is a schematic diagram of the state of the logistics vehicle of the present invention entering the starting end of the second conveying chain;

[0020] Figure 4 is a schematic diagram of a state in which the logistics vehicle of the present invention continues to be pulled by the second conveying chain;

[0021] Figure 5 It is a schematic diagram of a logistics vehicle being separated from the conveyor chain;

[0022] Figure 6 yes Figure 1 AA view;

[0023] Figure 7 It is a three-dimensional view of the power end of the conveyor chain of the present invention;

[0024] Figure 8 It is a three-dimensional view of the driven end of the conveyor chain of the present invention;

[0025] Fig. 9 is a three-dimensional view of a traction pin of the present invention;

[0026] In the figure: 1. The first conveyor chain; 2. The shelf; 3. The power end; 31. The motor; 32. The driving sprocket; 33. The base; 4. The supporting end; 41. The fixed bracket; 42. The chain support; 43. The guide slide; 5. The driven end; 51. The base; 52. The bearing seat; 53. The driven sprocket; 54. The tightening screw; 6. The traction mechanism; 61. The bracket; 62. The baffle; 63. The tension spring; 64. The traction pin; 7. The second conveyor chain; 8. The logistics vehicle; 81. The AGV mounting plate; 82. The first mounting point; 83. The second mounting point; 84. The guide slide; 85. The wheel; 86. The guide wheel. DETAILED DESCRIPTION

[0027] See also Figure 1 , Figure 7 , 8 9. This embodiment is a conveying device for long-distance variable-spacing picking and caching, comprising two conveying chains arranged in a straight line and a plurality of logistics vehicles 8. The logistics vehicles 8 are moved by being pulled by the conveying chains. A power end 3 and a driven end 5 are provided at both ends of each conveying chain. Both the power end 3 and the driven end 5 are provided with sprockets. A circulating chain is installed between the power end 3 and the driven end 5. A plurality of traction mechanisms 6 are installed on the circulating chain. The traction mechanism 6 comprises a bracket 61. The bottom of the bracket 61 is fixedly connected to the chain link of the circulating chain. A traction pin 64 is hinged on the bracket 61. The traction pin 64 rotates in a vertical plane. A baffle 62 is provided on 61 on one side of the traction pin 64, and the baffle 62 makes the traction pin 64 rotate only in the conveying direction. A tension spring 63 is installed between the baffle 62 and the traction pin 64, and the tension spring 63 is used to reset the traction pin 64 when it is located on the upper chain so that the traction pin 64 is in a vertical state; the logistics vehicle 8 includes a frame, and the front and rear ends of the frame are each provided with a hanging point, which cooperates with the traction pin 64 to drive the logistics vehicle 8 to move along the conveying chain, and the distance between the two hanging points is greater than the spacing between two adjacent conveying chains, so that the logistics vehicle 8 can cross adjacent conveying chains.

[0028] The present invention configures the traction pin 64 as a unilateral self-resetting swing pin, which is in a locked state when running along the conveying direction. When detached from the logistics vehicle 8, the traction pin 64 will be knocked down due to its own weight and will not interfere with the equipment. At the same time, the traction pin 64 is higher than the ground when returning along the conveying chain.

[0029] Furthermore, the power end 3 includes a base 33, on which a driving shaft is mounted, the driving shaft is connected to a driving mechanism, both ends of the driving shaft are rotatably connected to the base 33, and two driving sprockets 32 are mounted in the middle of the driving shaft; the driven end 5 includes a base 51, on which a driven shaft is provided, and on the driven shaft, a driven sprocket 53 is mounted corresponding to each of the two driving sprockets 32, and a circulating chain is wound between each driving sprocket 32 ​​and the corresponding driven sprocket 53, and bearing seats 52 are mounted at both ends of the driven shaft, the bearing seats 52 are slidably connected to the base 51, and a tightening screw 54 is mounted on the bearing seat 52, and the corresponding circulating chain is tightened by the tightening screw 54.

[0030] The driving mechanism of this embodiment includes a motor 31. A sprocket is installed at the output end of the motor 31, and a sprocket corresponding to the sprocket is installed on the driving shaft. A transmission chain is installed between the two sprockets.

[0031] The motor 31 of the present invention adopts a variable frequency reduction motor, and the running speed of the motor is changed according to the running speed requirement of the conveyor chain.

[0032] The circulating chain described in this embodiment adopts a single-sided bent plate chain with a chain number of 16A and a pitch of 25.4 mm. The spacing between the traction mechanisms 6 is set to a multiple of 25.4 mm, and the traction pins 64 are installed on the accessory bent plates of the bent plate chains on both sides.

[0033] See also Figure 6 Furthermore, a plurality of support ends 4 are provided between the power end 3 and the driven end 5, and the support end 4 includes a fixed bracket 41, and a group of chain supports 42 are respectively provided at the upper end and the lower end of the fixed bracket 41, and the number of each group of chain supports 42 is two. The circulating chain moves in the corresponding chain support 42, and the chain support 42 is composed of two parts, the outer layer is a steel plate sheet metal layer, and the inner layer is an engineering wear-resistant plastic.

[0034] Furthermore, two guide rails are symmetrically installed on both sides of the top of the support end 4, and a guide wheel 86 is installed on the frame of the logistics vehicle 8 corresponding to the two guide rails.

[0035] Furthermore, a through channel is provided at the bottom of the frame of the logistics vehicle 8 in the left-right direction, a guide slide 84 is provided in the channel, and an AGV mounting plate 81 is provided on the left or right side of the frame; the AGV shuttles from the bottom of the frame, and the AGV is generally provided with a lifting pin and two guide bearings, and the two guide bearings cooperate with the guide slide 84 to align the lifting pin of the AGV with the pin hole of the AGV mounting plate 81.

[0036] Furthermore, the bottoms of the power end 3, the support end 4 and the driven end 5 are all provided with adjusting bolts, and the adjusting bolts are used to adjust the height so that the circulating chain moves along a horizontal straight line to ensure that there is no climbing phenomenon during the conveying process.

[0037] Furthermore, the logistics vehicle 8 is provided with four rollers at the bottom, and the four rollers are all in the form of universal wheels, or in the form of two fixed wheels and two universal wheels.

[0038] The working principle of the present invention is as follows: When the logistics vehicle 8 moves in a conveying chain, it is driven to move in the conveying direction by the traction pin 64 of the conveying chain. When the logistics vehicle 8 moves to the joint of the two conveying chains, Figure 2-6 After the traction pin 64 of the first conveyor chain 1 conveys the first attachment point 82 of the logistics vehicle 8 to the stop position, the next traction pin 64 of the first conveyor chain 1 pushes the second attachment point 83 of the logistics vehicle 8 forward by a parking space. At this time, the traction pin 64 of the second conveyor chain 7 can be transferred to the first attachment point 82 of the logistics vehicle 8, thereby continuing to drive the logistics vehicle to run. Since the two conveyor chains run at the same speed, the traction pins 64 of the first conveyor chain 1 and the second conveyor chain 7 can be staggered by one parking space of the logistics vehicle 8 to achieve seamless transfer of the logistics vehicle 8. Therefore, in theory, the continuous superposition of conveyor chains can achieve unlimited extension of the travel of the logistics vehicle 8.

Claims

1. A conveying device for long-distance variable-pitch picking and caching, characterized by: The invention comprises a plurality of conveyor chains arranged in a straight line and a plurality of logistics vehicles, the logistics vehicles are moved by being pulled by the conveyor chains, a power end and a driven end are respectively provided at both ends of each conveyor chain, a sprocket is provided at the power end and the driven end, a circulating chain is installed between the power end and the driven end, a plurality of traction mechanisms are installed on the circulating chain, the traction mechanism comprises a bracket, the bottom of the bracket is fixedly connected with the chain link of the circulating chain, a traction pin is hinged on the bracket, the traction pin rotates in a vertical plane, a baffle is provided on one side of the traction pin on the bracket, the baffle makes the traction pin rotate only in the conveying direction, a tension spring is installed between the baffle and the traction pin; the logistics vehicle comprises a frame, a hanging point is respectively provided at the front end and the rear end of the frame, the hanging point cooperates with the traction pin to drive the logistics vehicle to move along the conveyor chain, the distance between the two hanging points is greater than the distance between two adjacent conveyor chains, so that the logistics vehicle can cross adjacent conveyor chains.

2. The long-distance variable-pitch picking and caching conveying device according to claim 1 is characterized in that: The power end includes a base, a driving shaft is installed on the base, the driving shaft is connected to a driving mechanism, both ends of the driving shaft are rotatably connected to the base, and two driving sprockets are installed in the middle of the driving shaft; the driven end includes a base, a driven shaft is provided on the base, and a driven sprocket is installed on the driven shaft corresponding to each of the two driving sprockets, and a circulating chain is installed between each driving sprocket and the corresponding driven sprocket.

3. The long-distance variable-pitch picking and caching conveying device according to claim 2 is characterized in that: A plurality of support ends are arranged between the power end and the driven end, and the support ends include fixed brackets. A group of chain supports are respectively arranged at the upper end and the lower end of the fixed bracket, and each group of chain supports has two chain supports. The circulating chain moves in the corresponding chain supports.

4. The conveying device for long-distance variable-pitch picking and caching according to claim 3 is characterized in that: Two guide rails are symmetrically arranged on both sides of the top of the support end, and a guide wheel is respectively arranged on the frame of the logistics vehicle corresponding to the two guide rails.

5. The long-distance variable-pitch picking and caching conveying device according to claim 1 is characterized in that: A through channel is provided at the bottom of the frame of the logistics vehicle in the left-right direction, a guide slide is provided in the channel, an AGV mounting plate is provided on the left or right side of the frame, and the guide slide is used to align the traction shaft of the AGV with the AGV mounting plate.

6. The long-distance variable-pitch picking and caching conveying device according to claim 3 is characterized by: The bottoms of the power end, the support end and the driven end are all provided with adjusting bolts, and the adjusting bolts are used to adjust the height so that the circulating chain moves along a horizontal straight line.

7. The conveying device for long-distance variable-pitch picking and caching according to claim 1 is characterized by: The bottom of the logistics vehicle is provided with four rollers, at least two of which are universal rollers.

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