RGV with lifting roller conveying function

Abstract

The utility model discloses an RGV trolley with a lifting roller conveying function. The RGV trolley comprises a frame, a walking mechanism, a lifting mechanism and a conveying mechanism. The walking mechanism and the conveying mechanism are located at the bottom of the frame. The lifting mechanisms are located on the top and side faces of the frame. The lifting mechanism comprises a ball screw lifter and four lifting units, and each lifting unit comprises a ball screw and a nut; the ball screw lifter is arranged on the frame, four ball screws on the front, back, left and right sides are respectively sleeved with a nut, and the mounting ends of the four nuts are connected with the front, back, left and right corners of the conveying mechanism. According to the RGV trolley with the lifting roller conveying function, the precision in the material conveying process is improved. And meanwhile, the safety of material conveying and the walking precision of the trolley are ensured.

Description

Technical Field

[0001] The utility model relates to a conveying trolley, in particular to an RGV trolley with a lifting roller conveyor. Background Art

[0002] With the reduction of industrial land, in order to increase the quantity of stored materials in the roller conveyor line within a limited space, more and more enterprises design the buffer area as a multi-layer three-dimensional layout, which requires transportation equipment to sort and pick up materials at different elevations in the buffer area in sets and distribute them to the next production process.

[0003] The disadvantages of the existing transportation equipment in enterprises are as follows: First, the lifting mechanism consists of a motor and a chain, resulting in poor accuracy and stability of the lifting of the conveying mechanism; Second, each roller of the conveying mechanism has only one motor, and segmented conveying cannot be achieved, which cannot meet the actual needs; Third, the conveying mechanism relies on manual judgment or time-delay control, and the horizontal conveying accuracy of materials is poor; Fourth, the traveling mechanism is manually controlled, and the traveling accuracy is poor; Fifth, there are no safety protection measures when materials enter and exit the equipment and during the traveling process, and there is a risk of material dropping. Summary of the Invention

[0004] The problem to be solved by the utility model is to provide an RGV trolley with a lifting roller conveyor, which improves the accuracy in material transportation. At the same time, it ensures the safety of material conveying and the accuracy of the trolley traveling.

[0005] An RGV trolley with a lifting roller conveyor of the utility model comprises a frame, a traveling mechanism, a lifting mechanism, and a conveying mechanism; the traveling mechanism and the conveying mechanism are located at the bottom of the frame, and the lifting mechanism is located on the top surface and side surface of the frame; the lifting mechanism comprises a ball screw elevator and four lifting units, and each lifting unit comprises a ball screw and a nut; the ball screw elevator is arranged on the top of the frame, and a nut is sleeved on each of the front, rear, left, and right ball screws, and the mounting ends of the four nuts are connected to the four corners of the front, rear, left, and right of the conveying mechanism.

[0006] Furthermore, each lifting unit further comprises a linear guide rail, the linear guide rail is fixed inside the frame support column and outside the ball screw, and the slider end of the nut is connected to the guide rail.

[0007] Furthermore, the lifting mechanism further comprises a lifting positioning system, and the lifting positioning system is a combined application of a wire rope encoder, a PLC, and a frequency converter.

[0008] Further, the conveying mechanism includes a bottom plate, front and rear baffles, a middle partition, and multiple conveying units. The bottom plate is located above the frame base. The front and rear baffles and the middle partition are fixed to the bottom plate. The left and right ends of the front and rear sides of the bottom plate are connected to the mounting ends of the nuts. Multiple conveying units are arranged between the front and rear baffles and the middle partition. Each conveying unit includes a motor, a main roller, a chain, and a driven roller. The motor is fixed below the front and rear baffles. The two ends of the main roller and the driven roller are fixedly connected to the baffles and the middle partition. The motor is connected to the main roller through a chain. The main roller and the driven roller are connected by a chain, and adjacent driven rollers are also connected by a chain.

[0009] Further, each conveying unit further includes a code disc; the code disc consists of a special-shaped disc and a proximity switch, and is installed on the motor through the special-shaped disc.

[0010] Further, the traveling mechanism includes a reduction motor, left and right couplings, and four drive wheel units respectively located at the four corners of the frame base. Each drive wheel unit includes two left and right bearing seats, a drive wheel, and a small transmission shaft; the reduction motor is located above the front or rear of the frame base. One end of the coupling is connected to the reduction motor, and the other end is connected to the small transmission shaft. The two ends of the small transmission shaft are connected to the bearings in the left and right bearing seats. The drive wheel is sleeved on the small transmission shaft.

[0011] Further, the coupling is a drum tooth coupling.

[0012] Further, the traveling mechanism further includes a traveling positioning system. The traveling positioning system is arranged in the control cabinet and is a combined application of a laser distance sensor, a PLC, and an inverter.

[0013] Further, it further includes a protection component. The protection component includes two pneumatic stop units arranged at the left and right ends of the front and rear baffles, i.e., the feeding and discharging ports. Each pneumatic stop unit includes a cylinder, a connecting rod, and two guide columns; the cylinder is connected to the middle partition. The middle of the connecting rod is connected to the cylinder, and each of its two ends is connected to a guide column. The two guide columns are respectively located between the baffle and the middle partition.

[0014] Further, the protection component further includes two front and rear safety nets, and the safety nets are fixed on the front and rear surfaces of the frame.

[0015] The advantages of the RGV vehicle with a lifting roller conveyor of the present utility model are as follows: First, the lifting mechanism consists of a ball screw lift, linear guide rails, ball screws, nuts, etc., which improves the smoothness and accuracy of the up-and-down movement of the conveying mechanism; Second, each roller of the conveying mechanism is divided into multiple units, realizing segmented conveying to meet actual requirements; Third, the conveying mechanism improves the transmission accuracy by adding a code disc, ensuring the horizontal conveying accuracy of the material; Fourth, the traveling mechanism relies on the positioning system for positioning, improving the traveling accuracy; Fifth, the pneumatic stoppers at both ends of the conveying mechanism can prevent the material from tipping over or slipping under high speed or heavy load, improving the safety of material transportation; The safety net can play a safety protection role when the material overturns.

[0016] In summary, the RGV vehicle of the present utility model improves the operation accuracy and automation level of the equipment, reduces manual intervention, realizes unmanned operation in the storage area for material retrieval, improves the material retrieval efficiency and accuracy, and reduces the labor cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a perspective view of the RGV vehicle with a lifting roller conveyor of the present utility model.

[0018] Figure 2 is the front view of the RGV vehicle with a lifting roller conveyor of the present utility model.

[0019] Figure 3 is Figure 2 the left view of.

[0020] Figure 4 is a perspective view of the traveling mechanism.

[0021] Figure 5 is the front view of the traveling mechanism.

[0022] Figure 6 is a perspective view of the conveying mechanism.

[0023] Figure 7 is the front view of the conveying mechanism.

[0024] Figure 8 is the top view of the conveying mechanism.

[0025] Figure 9 is a perspective view of the pneumatic stopper unit. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The following further describes the present utility model in detail with reference to the drawings and specific embodiments.

[0027] Embodiment 1

[0028] From Figure 1 , Figure 2 , Figure 3It can be seen that an RGV trolley with a lifting roller conveyor according to the present utility model comprises a frame 5, a traveling mechanism 1, a lifting mechanism 2, and a conveying mechanism 3; the traveling mechanism 1 and the conveying mechanism 3 are located at the bottom of the frame 5, and the lifting mechanism 2 is located at the top surface and side surface of the frame 5; the lifting mechanism 2 includes a ball screw elevator 21 and four lifting units, and each lifting unit includes a ball screw 23 and a nut 24; the ball screw elevator 21 is arranged on the top of the frame 5, and a nut 24 is sleeved on each of the four ball screws 23 in the front, rear, left, and right directions, and the mounting ends of the four nuts 24 are connected to the four corners of the front, rear, left, and right of the conveying mechanism 3.

[0029] When the ball screw elevator 21 works, the nuts 24 on the four ball screws 23 drive the conveying mechanism 3 to move up and down. The ball screw elevator 21 improves the accuracy and stability of the up and down movement of the conveying mechanism 3, enabling the conveying mechanism to accurately and smoothly stop at any determined position.

[0030] Embodiment 2

[0031] From Figure 1 、 Figure 2 、 Figure 3 It can be seen that an RGV trolley with a lifting roller conveyor according to the present utility model: each lifting unit further includes a linear guide rail 22, and the linear guide rail 22 is fixed inside the support column of the frame 5 and is located outside the ball screw 25, and the slider end of the nut 24 is connected to the guide rail 22.

[0032] When the conveying mechanism 3 moves up and down, the slider end of the nut 24 moves up and down along the linear guide rail 22, and the guiding function of the linear guide rail 22 improves the smoothness and accuracy of the lifting movement; in this way, even if there are workpieces placed on the conveying mechanism 3, the stability of its up and down movement can be ensured.

[0033] Embodiment 3

[0034] From Figure 1 、 Figure 2 、 Figure 3 It can be seen that an RGV trolley with a lifting roller conveyor according to the present utility model: the lifting mechanism 2 further includes a lifting positioning system, and the lifting positioning system is a combined application of a wire rope encoder, a PLC, and an inverter.

[0035] The lifting positioning system can be installed on the equipment or inside the motor, and it can achieve a positioning accuracy of ±2 mm for the lifting mechanism.

[0036] Embodiment 4

[0037] From Figure 1 、 Figure 2 、 Figure 3 、 Figure 6 、 Figure 7 、 Figure 8It can be seen that a kind of RGV cart with a lifting roller conveyor in the utility model: The conveying mechanism 3 includes a bottom plate 33, front and rear baffles 34, a middle partition 35, and a plurality of conveying units. The bottom plate 33 is located above the base of the frame 5. The front and rear baffles 34 and the middle partition 35 are fixed on the bottom plate 33. The left and right ends of the front and rear sides of the bottom plate 33 are connected to the mounting ends of the nuts 24. A plurality of conveying units are arranged between the front and rear baffles 34 and the middle partition 35. Each conveying unit includes a motor 31, a main roller 36, a chain 37, and a driven roller 38. The motor 31 is fixed under the front and rear baffles 34. The two ends of the main roller 36 and the driven roller 38 are fixedly connected to the baffles 34 and the middle partition 35. The motor 31 is connected to the main roller 36 through the chain 37. The main roller 36 and the driven roller 38 are connected by the chain 37, and adjacent driven rollers 38 are also connected by the chain 37.

[0038] When the motor 31 works, it drives the main roller 36 to rotate through the chain 37, and then drives the driven roller 38 to rotate, so as to realize the conveying of workpieces, sending the materials from the roller into the warehouse or transporting the materials in the warehouse out to the roller. The conveying mechanism divides each roller into multiple conveying units for segmented transportation, which is convenient for the conveying of different materials.

[0039] Embodiment 5

[0040] From Figure 1 、 Figure 2 、 Figure 3 、 Figure 6 、 Figure 7 、 Figure 8 It can be seen that a kind of RGV cart with a lifting roller conveyor in the utility model: Each conveying unit further includes a code disk 32; The code disk 32 is composed of a special-shaped disk and a proximity switch, and is installed on the motor 31 through the special-shaped disk.

[0041] When the special-shaped disk rotates with the motor 31, the proximity switch signal is alternately turned on and off. By calculating the number of times the proximity switch signal is turned on and off, the conveying distance of the conveying unit can be calculated. In this way, the positioning accuracy of the roller can be effectively improved by code disk counting, ensuring the horizontal conveying accuracy of the materials.

[0042] Embodiment 6

[0043] From Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5It can be seen that the RGV vehicle with a lifting roller conveyor of the present utility model: The traveling mechanism 1 includes a reduction motor 11, left and right couplings 12, and four driving wheel units respectively located at the four corners of the base of the frame 5. Each driving wheel unit includes left and right bearing seats 13, a driving wheel 14, and a small transmission shaft 15; the reduction motor 11 is located on the upper part of the front or rear of the base of the frame 5. One end of the coupling 12 is connected to the reduction motor 11, and the other end is connected to the small transmission shaft 15. Both ends of the small transmission shaft 15 are connected to the bearings in the left and right bearing seats 13, and the driving wheel 14 is sleeved on the small transmission shaft 15.

[0044] Among them, the reduction motor 11 forms the main drive with the left and right two driving wheel units in the front (rear) through the two couplings 12 at the left and right ends, and the left and right two driving wheel units in the rear (front) are the slave drives. In this way, when the reduction motor 11 works, it drives the left and right two small transmission shafts 15 in the front to rotate through the coupling 12, causing the left and right two driving wheels 14 to rotate and travel along the track. Furthermore, the left and right two driving wheels 14 in the rear also travel along the track.

[0045] Embodiment 7

[0046] From Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 It can be seen that the RGV vehicle with a lifting roller conveyor of the present utility model: The coupling 12 is a drum-shaped tooth coupling.

[0047] The reduction motor 11 is directly connected to the driving wheel 14 through the drum-shaped tooth coupling 12, which can effectively reduce the transmission error and improve the mechanical transmission accuracy.

[0048] Embodiment 8

[0049] From Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 It can be seen that the RGV vehicle with a lifting roller conveyor of the present utility model: The traveling mechanism 1 further includes a traveling positioning system 16. The traveling positioning system 16 is arranged in the control cabinet, and the traveling positioning system 16 is a combined application of a laser ranging sensor, a PLC, and an inverter.

[0050] The traveling positioning system 16 can achieve a positioning accuracy of ±5 mm for the traveling mechanism, thus ensuring the traveling accuracy of the RGV vehicle and the alignment accuracy between the conveying mechanism and the materials in the buffer area.

[0051] Embodiment 9

[0052] From Figure 1 、 Figure 2 、 Figure 3 、Figure 6 , Figure 7 , Figure 8 , Figure 9 It can be seen that a kind of RGV vehicle with a lifting roller conveyor of the utility model further comprises a protection component, and the protection component comprises two pneumatic stop units arranged at the left and right ends of the front and rear baffles 34, i.e., the feeding and discharging ports. Each pneumatic stop unit comprises a cylinder 41, a connecting rod 42 and two guide columns 43. The cylinder 41 is connected with the middle partition plate 45. The middle of the connecting rod 42 is connected with the cylinder 41, and one guide column 43 is connected to each of its two ends. The two guide columns 43 are respectively located between the baffle 34 and the middle partition plate 35.

[0053] The working principle of the pneumatic stop unit is that the cylinder 41 works to drive the two guide columns 43 to move up and down through the connecting rod 42. When the material enters the conveying mechanism, the guide column 43 in the pneumatic stop at the inlet end will automatically fall, and the guide column 43 in the pneumatic stop at the other end is in the raised state; on the contrary, when the material leaves the conveying mechanism, the guide column 43 in the pneumatic stop at the outlet end will automatically fall, and the guide column 43 in the pneumatic stop at the other end is in the raised state; during the overall movement of the RGV vehicle, the guide columns 43 in the pneumatic stops at both ends are in the raised position to block the material, preventing the material from tipping over or slipping under high speed or heavy load, and improving the safety of material transportation.

[0054] Embodiment 10

[0055] From Figure 1 , Figure 2 , Figure 3 , Figure 6 , Figure 7 , Figure 8 , Figure 9 It can be seen that a kind of RGV vehicle with a lifting roller conveyor of the utility model: the protection component 4 further comprises two sliding bearing seats 44, and the sliding bearing seats 44 are respectively connected with the front and rear baffles 34, and the connecting rod 42 passes through the sliding bearings in the sliding bearing seats 44.

[0056] When the guide column 43 moves up and down, the sliding bearing seat 44 is used as a guide, ensuring the stability of the up and down movement.

[0057] Embodiment 11

[0058] From Figure 1 , Figure 2 , Figure 3 , Figure 6 , Figure 7 , Figure 8 , Figure 9 It can be seen that a kind of RGV vehicle with a lifting roller conveyor of the utility model: the protection component 4 further comprises two front and rear safety nets 45, and the safety nets 45 are fixed on the front and rear surfaces of the frame 5.

[0059] When the RGV cart is moving, the safety guard net 45 can play a safety protection role when the materials tip over.

[0060] The working principle of the RGV cart with a lifting roller conveyor of the present utility model is as follows: First, it moves to the buffer area through the traveling mechanism, then the conveying mechanism is lifted to the corresponding height of the outbound materials through the lifting mechanism, then the outbound materials come to the conveying mechanism through the rollers, and finally the traveling mechanism moves to the next production process to put down the materials.

[0061] The advantages of the RGV cart with a lifting roller conveyor of the present utility model are as follows: First, the lifting mechanism is composed of a ball screw elevator, a linear guide rail, a ball screw, a nut, etc., which improves the smoothness and accuracy of the up and down movement of the conveying mechanism; Second, each roller of the conveying mechanism is divided into multiple units, realizing segmented conveying to meet the actual needs; Third, the conveying accuracy is improved by adding a code disc to the conveying mechanism, ensuring the horizontal conveying accuracy of the materials; Fourth, the traveling mechanism relies on the positioning system for positioning, improving the traveling accuracy; Fifth, the pneumatic stoppers at both ends of the conveying mechanism can prevent the materials from tipping over or slipping under high speed or heavy load conditions, improving the safety of material transportation; The safety guard net can play a safety protection role when the materials tip over.

[0062] In short, the RGV cart of the present utility model improves the operation accuracy and automation level of the equipment, reduces manual intervention, realizes unmanned material picking in the storage area, improves the material picking efficiency and accuracy, and reduces the labor cost.

Claims

1. An RGV trolley with lifting roller transmission, characterized by: It comprises a frame (5), a walking mechanism (1), a lifting mechanism (2), and a conveying mechanism (3); the walking mechanism (1) and the conveying mechanism (3) are located at the bottom of the frame (5), and the lifting mechanism (2) is located at the top and side surfaces of the frame (5); the lifting mechanism (2) comprises a ball screw lifter (21) and four lifting units, each lifting unit comprising a ball screw (23) and a nut (24); the ball screw lifter (21) is arranged on the top of the frame (5), and a nut (24) is respectively sleeved on the four ball screws (23) at the front, back, left, and right sides, and the mounting ends of the four nuts (24) are connected to the four corners at the front, back, left, and right sides of the conveying mechanism (3).

2. The RGV trolley according to claim 1 is characterized in that: Each lifting unit also includes a linear guide rail (22), which is fixed inside the support column of the frame (5) and located outside the ball screw (23), and the slider end of the nut (24) is connected to the guide rail (22).

3. The RGV trolley according to claim 1 is characterized in that: The lifting mechanism (2) also includes a lifting positioning system, which is a combined application of a wire encoder, a PLC, and a frequency converter.

4. The RGV trolley according to claim 1 is characterized in that: The conveying mechanism (3) comprises a bottom plate (33), front and rear baffles (34), a middle baffle (35), and a plurality of conveying units. The bottom plate (33) is located on the base of the frame (5). The front and rear baffles (34) and the middle baffle (35) are fixed on the bottom plate (33). The left and right ends of the front and rear sides of the bottom plate (33) are connected to the mounting ends of the nuts (24). A plurality of conveying units are arranged between the front and rear baffles (34) and the middle baffle (35). Each conveying unit comprises a motor. (31), a main roller (36), a chain (37), and a slave roller (38), wherein the motor (31) is fixed below the front and rear baffles (34), the two ends of the main roller (36) and the slave roller (38) are fixedly connected to the baffle (34) and the middle partition (35), the motor (31) is connected to the main roller (36) through the chain (37), and the main roller (36) and the slave roller (38) and the adjacent slave rollers (38) are connected through the chain (37).

5. The RGV trolley according to claim 4 is characterized in that: Each conveying unit further comprises a code disc (32); the code disc (32) is composed of a special-shaped disc and a proximity switch, and is mounted on the motor (31) via the special-shaped disc.

6. The RGV trolley according to claim 1 is characterized in that: The mechanism (1) comprises a reduction motor (11), left and right couplings (12), and four transmission wheel units respectively located at the four corners of the base of the frame (5), each transmission wheel unit comprising two left and right bearing seats (13), a transmission wheel (14), and a small transmission shaft (15); the reduction motor (11) is located on the front side or the rear side of the base of the frame (5), one end of the coupling (12) is connected to the reduction motor (11), and the other end is connected to the small transmission shaft (15), the two ends of the small transmission shaft (15) are connected to the bearings in the left and right bearing seats (13), and the transmission wheel (14) is sleeved on the small transmission shaft (15).

7. The RGV vehicle according to claim 6 is characterized in that: The coupling (12) is a drum gear coupling.

8. The RGV vehicle according to claim 6 is characterized in that: The walking mechanism (1) also includes a walking positioning system (16), which is arranged in a control cabinet. The walking positioning system (16) is a combined application of a laser distance measuring sensor, a PLC, and a frequency converter.

9. The RGV vehicle according to claim 1 is characterized in that: It also includes a protection component (4), which includes two pneumatic stop units arranged at the left and right ends of the front and rear baffles (34), i.e., the inlet and outlet ports, each of which includes a cylinder (41), a connecting rod (42), and two guide pillars (43); the cylinder (41) is connected to the middle baffle (35), the middle of the connecting rod (42) is connected to the cylinder (41), and its two ends are each connected to a guide pillar (43), and the two guide pillars (43) are respectively located between the baffle (34) and the middle baffle (35).

10. The RGV trolley according to claim 9, characterized in that: The protection assembly (4) also includes two front and rear safety nets (45), which are fixed on the front and rear surfaces of the frame (5).

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