Fork elevator

Abstract

The utility model discloses a tooth fork elevator which comprises two installation frames, the two installation frames are oppositely arranged in parallel, first rotating shafts are rotationally arranged in the middles of the upper end and the lower end of each installation frame, a first chain wheel is arranged on the first rotating shaft on the upper portion, and a second chain wheel is arranged on the second rotating shaft on the lower portion. The second motor drives the second roller and the first roller to rotate, the multiple feeding trays are conveyed to proper positions on the material supporting mechanism, the second motor is closed, the number of the feeding trays is detected through the multiple photoelectric sensors, detected data are transmitted to the PLC, the PLC controls the first motor to be started, and the feeding trays are conveyed to the material supporting mechanism. The first chain, the second chain, the fourth chain and the two third chains are sequentially driven to rotate, sliding frames of the two sliding mechanisms synchronously and stably slide along the two guide shafts, the material supporting mechanism stably moves upwards along with the two sliding mechanisms to lift a feeding tray, the basic height of equipment is greatly reduced, stacking is safe and reliable, lifting is stable and reliable, and the lifting effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of logistics elevators, in particular to a tooth fork elevator. Background Art

[0002] At present, domestic pallets are transported in and out of warehouses by using forklifts and cranes. Forklifts cannot directly move pallets in and out of warehouses, and cranes require a large investment.

[0003] When the pallet is put into storage, due to the high foundation height of the conveyor line, the pallet is prone to shaking during the lifting process, causing the material to fall. There are certain safety hazards when transporting and lifting pallets and materials. The forklift cannot pick up the materials and connect them to the product production line smoothly and quickly, resulting in the pallet being unable to quickly reach the appropriate position of the elevator.

[0004] Therefore, it is necessary to provide a tooth fork lifting machine to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of the utility model is to provide a tooth fork lifting machine to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a tooth fork lifting machine, including a mounting frame, wherein the mounting frames are provided with two, the two mounting frames are arranged in parallel and opposite to each other, a first rotating shaft is rotatably provided in the middle of the upper and lower ends of the mounting frame, a first sprocket is provided on the upper first rotating shaft, a second double-row sprocket is provided on the lower first rotating shaft, a third chain is provided on the first sprocket and the second double-row sprocket, two guide shafts are arranged in parallel in the mounting frame, a sliding mechanism is slidably provided on the two guide shafts, the sliding mechanism is fixedly connected to the third chain, a supporting mechanism is fixedly connected between the two sliding mechanisms, a third mounting plate is provided on the mounting frame, a first motor is provided on the third mounting plate, a gear is provided on the output end of the first motor, and a side wall of the mounting frame A fourth mounting plate is provided, a rotating hole is provided on the side wall of the mounting frame, the rotating hole passes through the middle of the fourth mounting plate, a transmission shaft is rotatably provided in the rotating holes of the two mounting frames, a first double-row sprocket is provided at both ends of the transmission shaft, a first chain is provided on the gear at the output end of the first motor and the first double-row sprocket, a second chain is provided on another sprocket tooth of the first double-row sprocket and another sprocket tooth of the second double-row sprocket, a fourth chain is provided on another first double-row sprocket and another second double-row sprocket, a plurality of loading trays are provided on the upper surface of the supporting mechanism, a plurality of proximity switches and a plurality of photoelectric sensors are evenly provided in the mounting frame, a plurality of photoelectric sensors are provided in another mounting frame, limit switches are provided at the upper and lower ends of the mounting frame, and light curtain sensors are provided on the front sides of the two mounting frames.

[0007] As an optimal technical solution of the utility model, the sliding mechanism includes a sliding frame, a plurality of vertical plates are arranged in the sliding frame, a locking hole is opened at the top of the sliding frame, the locking hole runs through the entire sliding frame, and connectors are inserted at the upper and lower positions of the locking hole, the connectors are locked at the upper and lower ends of the sliding frame by two locking nuts, and the two connector heads are fixedly connected to the third chain, the top of the sliding frame is provided with a through hole, the through hole is a square hole, the third chain passes through the through hole, and mounting holes are opened at both ends of the top of the sliding frame, linear bearings are fixedly arranged at the upper and lower ends of the two mounting holes, two groups of linear bearings are respectively slidably sleeved on the outer circumferential surfaces of the two guide shafts, connecting plates are arranged at both ends of the sliding frame side walls on the two mounting frames, and the two ends of the supporting mechanism are respectively fixedly arranged on four connecting plates.

[0008] As a preferred technical solution of the utility model, the supporting mechanism includes a supporting frame, two brackets are arranged on the two side walls of the supporting frame, and the four brackets are fixedly connected to the four connecting plates respectively. A second motor is arranged at one end of the side wall of the supporting frame, and a first gear is arranged on the output end of the second motor. Two second rollers are rotatably arranged between the side walls of the supporting frame, and third double-row sprockets are arranged at both ends of the two second rollers. A fifth chain is arranged on the first gear and the third double-row sprockets at one end of the two second rollers. A reinforcing rib plate is also arranged between the supporting frames, and two ends of the upper surface of the supporting frame are provided with Installation groove, multiple first rollers are rotatably arranged in both installation grooves, the multiple first rollers are evenly distributed in parallel, the multiple first rollers in the two installation grooves are relatively arranged, a third double-row sprocket is arranged at one end of the first roller, the third double-row sprocket at one end of the second roller and the third double-row sprocket at one end of a group of first rollers are arranged with a chain, the third double-row sprocket at the other end of the second roller and the third double-row sprocket at one end of another group of first rollers are arranged with a chain, protective covers are arranged at both ends of the upper surface of the support frame, the protective covers are located on the outside of the multiple third double-row sprockets, and a material guide cover is arranged at the end of the support frame.

[0009] As a preferred technical solution of the utility model, two mounting vertical plates are arranged in parallel in the mounting frame, multiple proximity switches and multiple photoelectric sensors are respectively arranged on the two mounting vertical plates, multiple proximity switch heads are arranged opposite to the side wall of the sliding mechanism, multiple photoelectric sensor detection heads are arranged opposite to another mounting frame, two vertical plates are arranged on the other mounting frame, another group of photoelectric sensors is arranged on one vertical plate, the two groups of photoelectric sensors are arranged opposite to each other in a one-to-one manner, and the two limit switches are respectively arranged at the upper and lower ends of the other vertical plate.

[0010] As a preferred technical solution of the utility model, a fourth protective cover is provided on the front of the two mounting frames, the light curtain sensor is located at the lower end of the fourth protective cover, the detection heads of the two light curtain sensors are arranged opposite each other, a fifth protective cover is provided on the back of the two mounting frames, a first panel and a second panel are provided on the two side walls opposite each other of the two mounting frames, a plurality of detection holes are evenly opened on the side walls of the second panel, and the plurality of detection holes are arranged one by one opposite to the detection heads of the plurality of photoelectric sensors, a first protective cover and a second protective cover are provided on the outer side walls of the two mounting frames, two handles are embedded on the first protective cover and the second protective cover, and a third protective cover is provided on the top of the two mounting frames.

[0011] As a preferred technical solution of the utility model, a first groove is formed on the side wall of the first panel, and a bracket of the supporting mechanism passes through the first groove; a second groove is formed on the side wall of the second panel, and another bracket of the supporting mechanism passes through the second groove.

[0012] As a preferred technical solution of the utility model, two hanging rings are provided on the top of the two mounting frames.

[0013] As a preferred technical solution of the utility model, a protective column is arranged between the two fourth mounting plates, the protective column is a square column, and the protective column is located outside the transmission shaft.

[0014] As a preferred technical solution of the utility model, two second mounting plates are respectively disposed opposite to the bottom upper end surface and the top lower end surface of the mounting frame, and a clamping seat is fixedly disposed on the two sets of second mounting plates disposed opposite to each other, and the guide shaft is clamped between the two clamping seats.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The tooth fork lift described in the utility model uses a hydraulic forklift to pick up a loading pallet and push the material into the tooth fork lift, and places multiple loading pallets on the supporting mechanism. The docking is convenient and fast. After the loading pallets are placed, the hydraulic vehicle withdraws from the tooth fork lift. When the light curtain sensor at the entrance detects that the hydraulic vehicle has left, the system operates, starts the second motor to drive the second roller and the first roller to rotate, and transports multiple loading pallets to appropriate positions on the supporting mechanism. The second motor is turned off, and the number of loading pallets is detected by multiple photoelectric sensors. The detected data is transmitted to the PLC, and the PLC controls the lifting height of the loading pallet according to the actual number of loading pallets. Through layered detection, the PLC can read the number of pallets in real time. The PLC controls the start of the first motor, which in turn drives the second motor to start and drive the second roller and the first roller to start. The first chain, the second chain, the fourth chain and the two third chains are driven to rotate, thereby realizing synchronous rotation of the two third chains, and the sliding frames of the two sliding mechanisms synchronously slide smoothly along the two guide shafts, and the supporting mechanism lifts the loading tray as the two sliding mechanisms move upward smoothly. A set of lifting power is adopted, which is transmitted to the left and right sides through the connecting shaft, thereby realizing left and right drive, greatly reducing the basic height of the equipment, and stacking is safe and reliable. Through single-power lifting, the left and right lifting are absolutely synchronized, the lifting is stable and reliable, and the lifting effect is good. In the process of lifting the loading tray, multiple proximity switches detect the height of the loading tray in turn, and transmit the detected data to the PLC in real time. When the PLC detects that the height of the loading tray reaches the set value, the first motor is turned off at this time to stack the loading tray. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0018] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is a three-dimensional schematic diagram of the internal structure of the utility model;

[0020] Figure 3 It is a three-dimensional schematic diagram of the connection relationship between the sliding mechanism and the mounting frame of the utility model;

[0021] Figure 4 It is a three-dimensional schematic diagram of the transmission connection relationship between the sliding mechanism and the first motor of the utility model;

[0022] Figure 5 It is a three-dimensional schematic diagram of the sliding mechanism transmission of the utility model;

[0023] Figure 6 It is a three-dimensional schematic diagram of the mounting frame structure of the utility model;

[0024] Figure 7It is a three-dimensional schematic diagram of the support mechanism structure of the utility model;

[0025] Figure 8 It is a three-dimensional schematic diagram of the internal structure of the support mechanism of the utility model;

[0026] Fig. 9 It is a three-dimensional schematic diagram of the sliding mechanism structure of the utility model;

[0027] Fig.10 It is a three-dimensional schematic diagram of the sliding frame structure of the utility model.

[0028] In the figure: 1, mounting frame; 101, first mounting plate; 102, second mounting plate; 103, third mounting plate; 104, fourth mounting plate; 105, rotating hole; 2, loading tray; 3, supporting mechanism; 301, supporting frame; 3011, mounting groove; 302, second motor; 303, first roller; 304, bracket; 305, protective cover; 306, second roller; 307, reinforcing rib plate; 308, first gear; 309, fifth chain; 310, third double-row sprocket; 4, light curtain sensor; 5, first protective cover; 6, second protective cover; 7, handle; 8, first panel; 81, first groove; 9, second panel; 91, second groove; 92, detection hole; 10, third protective cover; 1 1. Fourth protective cover; 12. Fifth protective cover; 13. Material guide cover; 14. Photoelectric sensor; 15. Sliding mechanism; 151. Sliding frame; 1511. Vertical plate; 1512. Locking hole; 1513. Mounting hole; 1514. Connecting plate; 1515. Through hole; 152. Linear bearing; 153. Connecting head; 154. Locking nut; 16. First motor; 17. Transmission shaft; 18. First double-row sprocket; 19. First chain; 20. Second chain; 21. First rotating shaft; 22. Second double-row sprocket; 23. Third chain; 24. First sprocket; 25. Guide shaft; 26. Card seat; 27. Fourth chain; 28. Limit switch; 29. ​​Proximity switch; 30. Lifting ring; 31. Protective column. DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described below with reference to the accompanying drawings. In the process, in order to ensure the clarity and convenience of the description, we may exaggerate the width of the lines or the size of the components in the drawings.

[0030] In addition, the terms used below are defined based on the functions of the present invention and may vary depending on the intention or custom of the user or operator. Therefore, these terms are defined based on the entire contents of this specification.

[0031] like Figures 1 to 6As shown, a tooth fork hoist includes a mounting frame 1, two mounting frames 1 are provided, and the two mounting frames 1 are arranged in parallel and opposite to each other. Two first mounting plates 101 are arranged opposite to each other in the middle of the upper and lower ends of the mounting frame 1, and a first rotating shaft 21 is rotatably arranged between the two oppositely arranged first mounting plates 101. A first sprocket 24 is arranged on the upper first rotating shaft 21, and a second double-row sprocket 22 is arranged on the lower first rotating shaft 21. A third chain 23 is arranged on the first sprocket 24 and the second double-row sprocket 22. The first sprocket 24 and the second double-row sprocket 22 are driven by the third chain 23, and two second mounting plates 102 are respectively arranged opposite to the upper end surface of the bottom and the lower end surface of the top of the mounting frame 1, and a clamping seat 26 is fixedly arranged on the two sets of second mounting plates 102 arranged opposite to each other, and a guide shaft 25 is clamped between the two clamping seats 26. The two guide shafts 25 are arranged in parallel on the mounting frame 1, and a sliding mechanism 15 is slidably arranged on the two guide shafts 25. The sliding mechanism 15 is fixedly connected to the third chain 23, and the sliding mechanism 15 is driven to slide up and down by the third chain 23.

[0032] like Fig. 9 and Fig.10 As shown, the sliding mechanism 15 includes a sliding frame 151, and a plurality of vertical plates 1511 are arranged in the sliding frame 151 to increase the overall structural strength of the sliding frame 151. A locking hole 1512 is opened at the top of the sliding frame 151, and the locking hole 1512 runs through the entire sliding frame 151. Connectors 153 are inserted at the upper and lower positions of the locking hole 1512. The connectors 153 are locked at the upper and lower ends of the sliding frame 151 through two locking nuts 154. The heads of the two connectors 153 are fixedly connected to the third chain 23, and the entire sliding frame 151 is driven to slide up and down by the third chain 23. The top of the sliding frame 151 A through hole 1515 is provided on the top of the sliding frame 151, and the through hole 1515 is a square hole. The third chain 23 passes through the through hole 1515. Both ends of the top of the sliding frame 151 are provided with mounting holes 1513. Linear bearings 152 are fixedly provided at both ends of the two mounting holes 1513. Two groups of linear bearings 152 are respectively slidably sleeved on the outer circumferential surfaces of the two guide shafts 25, so that the sliding frame 151 slides up and down along the two guide shafts 25, and the sliding is smooth and reliable to prevent shaking. Connecting plates 1514 are provided at both ends of the side walls of the sliding frame 151 on the two mounting frames 1, and a supporting mechanism 3 is provided between the four connecting plates 1514.

[0033] like Figure 7 and Figure 8As shown, the supporting mechanism 3 includes a supporting frame 301, and two brackets 304 are arranged on the two side walls of the supporting frame 301. The four brackets 304 are respectively fixedly connected to the four connecting plates 1514, so that the supporting mechanism 3 is installed between the two sliding mechanisms 15, so that the sliding mechanism 15 can drive the supporting mechanism 3 to slide up and down to lift the material. A second motor 302 is arranged at one end of the side wall of the supporting frame 301, and a first gear 308 is arranged on the output end of the second motor 302. 1 Two second rollers 306 are rotatably arranged between the side walls, and both ends of the two second rollers 306 are provided with third double-row sprockets 310, and the first gear 308 and the third double-row sprockets 310 at one end of the two second rollers 306 are provided with fifth chains 309, and the two second rollers 306 are driven to rotate synchronously by the fifth chains 309, and reinforcing rib plates 307 are also arranged between the brackets 301 to enhance the structural strength of the brackets 301, and both ends of the upper surface of the brackets 301 are provided with mounting grooves 309. 011, a plurality of first rollers 303 are rotatably arranged in both the two installation grooves 3011, and the plurality of first rollers 303 are evenly distributed in parallel. The plurality of first rollers 303 in the two installation grooves 3011 are arranged opposite to each other, and a third double-row sprocket 310 is arranged at one end of each of the first rollers 303. Chains are arranged on the third double-row sprocket 310 at one end of the second roller 306 and the third double-row sprocket 310 at one end of a group of first rollers 303, so that the second roller 306 and a group of first rollers 303 are synchronously moved. The third double-row sprocket 310 at the other end of the second roller 306 and the third double-row sprocket 310 at one end of the other group of first rollers 303 are provided with chains, so that the second roller 306 and the other group of first rollers 303 can rotate synchronously, which is convenient for conveying the pallet to the appropriate position on the supporting mechanism 3. Protective covers 305 are provided at both ends of the upper surface of the supporting frame 301, and the protective covers 305 are located on the outside of the multiple third double-row sprockets 310. A material guide cover 13 is provided at the end of the supporting frame 301 to facilitate the pallet to enter therein.

[0034] like Figures 3 to 6As shown, a third mounting plate 103 is provided on the mounting frame 1, a first motor 16 is provided on the third mounting plate 103, a gear is provided on the output end of the first motor 16, a fourth mounting plate 104 is provided on the side wall of the mounting frame 1, a rotating hole 105 is opened on the side wall of the mounting frame 1, the rotating hole 105 runs through the middle of the fourth mounting plate 104, a transmission shaft 17 is rotatably provided in the rotating holes 105 of the two mounting frames 1, and a first double-row sprocket 18 is provided at both ends of the transmission shaft 17, a protective column 31 is provided between the two fourth mounting plates 104, the protective column 31 is a square column, the protective column 31 is located on the outside of the transmission shaft 17, and the output end of the first motor 16 A first chain 19 is arranged on the gear and the first double-row sprocket 18, a second chain 20 is arranged on another sprocket tooth of the first double-row sprocket 18 and another sprocket tooth of the second double-row sprocket 22, a fourth chain 27 is arranged on the first double-row sprocket 18 and the other second double-row sprocket 22 arranged on the end of the transmission shaft 17 away from the first motor 16, and the first motor 16 is started to drive the first chain 19, the second chain 20 and the fourth chain 27 to transmit in sequence, so that the third chains 23 on the two mounting frames 1 rotate synchronously, and the two third chains 23 respectively drive the two sliding mechanisms 15 to slide up and down along the two guide shafts 25, and the supporting mechanism 3 moves up and down with the sliding mechanism 15, and slides smoothly.

[0035] A plurality of loading trays 2 are arranged on the upper surface of the supporting mechanism 3, and the plurality of loading trays 2 are stacked up and down. Two parallel mounting vertical plates are arranged in the mounting frame 1, and a plurality of proximity switches 29 are evenly arranged on one mounting vertical plate, and the heads of the plurality of proximity switches 29 are arranged facing the side wall of the sliding mechanism 15. A plurality of photoelectric sensors 14 are arranged on the other mounting vertical plate, and the detection heads of the plurality of photoelectric sensors 14 are arranged facing the other mounting frame 1. Two vertical plates are arranged on the other mounting frame 1, and a plurality of photoelectric sensors 14 are arranged on one vertical plate. The two groups of photoelectric sensors 14 are arranged facing each other in a one-to-one corresponding manner. Limit switches 28 are arranged at both upper and lower ends of the other vertical plate for limiting the sliding mechanism 15.

[0036] like Figure 1 and Figure 2As shown, the front of the two mounting frames 1 is provided with a fourth protective cover 11 and a light curtain sensor 4, the light curtain sensor 4 is located at the lower end of the fourth protective cover 11, the detection heads of the two light curtain sensors 4 are arranged opposite to each other, the back of the two mounting frames 1 is provided with a fifth protective cover 12, the two side walls facing each other of the two mounting frames 1 are provided with a first panel 8 and a second panel 9, the side wall of the first panel 8 is provided with a first groove 81, a bracket 304 of the supporting mechanism 3 passes through the first groove 81, and the side wall of the second panel 9 is provided with a second groove 91, Another bracket 304 of the supporting mechanism 3 passes through the second slot 91, and a plurality of detection holes 92 are evenly opened on the side wall of the second panel 9, and the plurality of detection holes 92 are arranged one by one opposite to the detection heads of the plurality of photoelectric sensors 14. The first protective cover 5 and the second protective cover 6 are arranged on the outer side walls of the two mounting frames 1, and two handles 7 are embedded on the first protective cover 5 and the second protective cover 6. A third protective cover 10 is arranged on the top of the two mounting frames 1, and two hanging rings 30 are arranged on the top of the two mounting frames 1 to facilitate the adjustment of the position of the equipment.

[0037] The specific implementation method is as follows: a hydraulic forklift is used to pick up a loading pallet 2 and push the material into a tooth fork elevator, and multiple loading pallets 2 are placed on the supporting mechanism 3. After the loading pallets 2 are placed, the hydraulic vehicle withdraws from the tooth fork elevator, and the docking is convenient and fast. When the light curtain sensor 4 at the entrance detects that the hydraulic vehicle has left, the system operates, and the second motor 302 is started to drive the second roller 306 and the first roller 303 to rotate, and multiple loading pallets 2 are transported to the appropriate position on the supporting mechanism 3, and the second motor 302 is turned off. The number of loading pallets 2 is detected by multiple photoelectric sensors 14, and the detected data is transmitted to the PLC. The PLC controls the lifting height of the loading pallet 2 according to the actual number of loading pallets 2. Through layered detection, the PLC can read the number of pallets in real time. The PLC controls the first motor 16 to start, and drives the first chain 19, the second chain 20, the fourth chain 27 and the two third chains 23 to rotate in turn, thereby realizing the synchronous rotation of the two third chains 23, and the sliding frames 151 of the two sliding mechanisms 15 rotate synchronously. The loading tray 2 is lifted by the support mechanism 3 and the support mechanism 3 moves up smoothly along the two guide shafts 25. A set of lifting power is adopted and transmitted to the left and right sides through the connecting shaft, thereby realizing left and right drive, greatly reducing the basic height of the equipment, and making the stacking safe and reliable. The single-power lifting makes the left and right lifting absolutely synchronized, the lifting is stable and reliable, and the lifting effect is good. In the process of lifting the loading tray 2, multiple proximity switches 29 detect the height of the loading tray 2 in turn, and transmit the detected data to the PLC in real time. When the PLC detects that the height of the loading tray 2 reaches the set value, the first motor 16 is turned off at this time, and the loading tray 2 is stacked. After completion, the loading tray 2 is transferred to the appropriate position, and the PLC controls the first motor 16 to reverse and reset the support mechanism 3. The limit switch 28 at the lower end limits the sliding mechanism 15 when it slides to the lowermost end, and the limit switch 28 at the upper end limits the sliding mechanism 15 to prevent the height of the loading tray 2 from being higher than the mounting frame 1, thereby ensuring safe and stable stacking.

[0038] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A tooth fork lifting machine, comprising a mounting frame (1), wherein two mounting frames (1) are provided, and the two mounting frames (1) are arranged parallel to each other, and characterized in that: The mounting frame (1) is rotatably provided with a first rotating shaft (21) at the middle of both upper and lower ends; a first sprocket (24) is provided on the upper first rotating shaft (21); a second double-row sprocket (22) is provided on the lower first rotating shaft (21); a third chain (23) is provided on the first sprocket (24) and the second double-row sprocket (22); two guide shafts (25) are parallelly provided in the mounting frame (1); a sliding mechanism (15) is slidably provided on the two guide shafts (25); The mechanism (15) is fixedly connected to the third chain (23), a supporting mechanism (3) is fixedly connected between the two sliding mechanisms (15), a third mounting plate (103) is arranged on the mounting frame (1), a first motor (16) is arranged on the third mounting plate (103), a gear is arranged on the output end of the first motor (16), a fourth mounting plate (104) is arranged on the side wall of the mounting frame (1), a rotating hole (105) is opened on the side wall of the mounting frame (1), and the rotating hole (105) A transmission shaft (17) is rotatably arranged in a rotating hole (105) of the two mounting frames (1) and runs through the middle of the fourth mounting plate (104). Both ends of the transmission shaft (17) are provided with a first double-row sprocket (18). A first chain (19) is arranged on a gear at an output end of the first motor (16) and the first double-row sprocket (18). A second chain (20) is arranged on another sprocket tooth of the first double-row sprocket (18) and another sprocket tooth of the second double-row sprocket (22). Another first double-row sprocket (18) and another second double-row sprocket (22) are provided with a fourth chain (27), a plurality of loading trays (2) are provided on the upper surface of the supporting mechanism (3), a plurality of proximity switches (29) and a plurality of photoelectric sensors (14) are evenly provided in the mounting frame (1), a plurality of photoelectric sensors (14) are provided in the other mounting frame (1), limit switches (28) are provided at both upper and lower ends of the mounting frame (1), and light curtain sensors (4) are provided on the front sides of the two mounting frames (1).

2. A tooth fork lifting machine according to claim 1, characterized in that: The sliding mechanism (15) comprises a sliding frame (151), wherein a plurality of vertical plates (1511) are arranged in the sliding frame (151), a locking hole (1512) is provided at the top of the sliding frame (151), the locking hole (1512) runs through the entire sliding frame (151), the upper and lower positions of the locking hole (1512) are both plugged with connectors (153), the connectors (153) are locked at the upper and lower ends of the sliding frame (151) by two locking nuts (154), the heads of the two connectors (153) are both fixedly connected to the third chain (23), and the top of the sliding frame (151) is provided with a locking hole (1512) extending through the entire sliding frame (151). The through hole (1515) is a square hole, and the third chain (23) passes through the through hole (1515). The two ends of the top of the sliding frame (151) are provided with mounting holes (1513). The upper and lower ends of the two mounting holes (1513) are fixedly provided with linear bearings (152). The two groups of linear bearings (152) are respectively slidably sleeved on the outer circumferential surfaces of the two guide shafts (25). The two ends of the side walls of the sliding frames (151) on the two mounting frames (1) are provided with connecting plates (1514), and the two ends of the supporting mechanism (3) are respectively fixedly provided on the four connecting plates (1514).

3. A tooth fork lifting machine according to claim 1, characterized in that: The supporting mechanism (3) comprises a supporting frame (301), two brackets (304) are arranged on both side walls of the supporting frame (301), and the four brackets (304) are respectively fixedly connected to four connecting plates (1514); a second motor (302) is arranged at one end of the side wall of the supporting frame (301), and a first gear (308) is arranged at the output end of the second motor (302); two second rollers (306) are rotatably arranged between the side walls of the supporting frame (301), and third double-row sprockets (310) are arranged at both ends of the two second rollers (306); a fifth chain (309) is arranged on the first gear (308) and the third double-row sprockets (310) at one end of the two second rollers (306); a reinforcing rib plate (307) is further arranged between the supporting frames (301); installation grooves (3011) are arranged at both ends of the upper surface of the supporting frame (301); A plurality of first rollers (303) are rotatably arranged in the installation groove (3011), and the plurality of first rollers (303) are evenly distributed in parallel. The plurality of first rollers (303) in the two installation grooves (3011) are arranged opposite to each other. A third double-row sprocket (310) is arranged at one end of each of the first rollers (303). A chain is arranged on the third double-row sprocket (310) at one end of the second roller (306) and the third double-row sprocket (310) at one end of a group of first rollers (303). A chain is arranged on the third double-row sprocket (310) at the other end of the second roller (306) and the third double-row sprocket (310) at one end of another group of first rollers (303). Protective covers (305) are arranged at both ends of the upper surface of the support frame (301), and the protective covers (305) are located outside the plurality of third double-row sprockets (310). A material guide cover (13) is arranged at the end of the support frame (301).

4. A tooth fork lifting machine according to claim 1, characterized in that: Two mounting vertical plates are arranged in parallel in the mounting frame (1), and a plurality of proximity switches (29) and a plurality of photoelectric sensors (14) are arranged on the two mounting vertical plates respectively. The heads of the plurality of proximity switches (29) are arranged opposite to the side wall of the sliding mechanism (15), and the detection heads of the plurality of photoelectric sensors (14) are arranged opposite to another mounting frame (1). Two vertical plates are arranged on another mounting frame (1), and another group of photoelectric sensors (14) is arranged on one vertical plate. The two groups of photoelectric sensors (14) are arranged opposite to each other in a one-to-one corresponding manner, and the two limit switches (28) are arranged at the upper and lower ends of another vertical plate respectively.

5. The tooth fork lifting machine according to claim 1, characterized in that: The front of the two mounting frames (1) is provided with a fourth protective cover (11), the light curtain sensor (4) is located at the lower end of the fourth protective cover (11), the detection heads of the two light curtain sensors (4) are arranged opposite to each other, the back of the two mounting frames (1) is provided with a fifth protective cover (12), the two side walls opposite to each other of the two mounting frames (1) are provided with a first panel (8) and a second panel (9), the side wall of the second panel (9) is evenly provided with a plurality of detection holes (92), the plurality of detection holes (92) are arranged opposite to each other with the detection heads of the plurality of photoelectric sensors (14), the outer side walls of the two mounting frames (1) are provided with a first protective cover (5) and a second protective cover (6), the first protective cover (5) and the second protective cover (6) are both embedded with two handles (7), and the top of the two mounting frames (1) is provided with a third protective cover (10).

6. A tooth fork lifting machine according to claim 5, characterized in that: A first groove (81) is formed on the side wall of the first panel (8), and a bracket (304) of the supporting mechanism (3) passes through the first groove (81); a second groove (91) is formed on the side wall of the second panel (9), and another bracket (304) of the supporting mechanism (3) passes through the second groove (91).

7. The tooth fork lifting machine according to claim 1, characterized in that: Two hanging rings (30) are arranged on the top of the two mounting frames (1).

8. The tooth fork lifting machine according to claim 1, characterized in that: A protection column (31) is provided between the two fourth mounting plates (104); the protection column (31) is a square column; and the protection column (31) is located outside the transmission shaft (17).

9. The tooth fork lifting machine according to claim 1, characterized in that: Two second mounting plates (102) are respectively arranged opposite to the bottom upper end surface and the top lower end surface of the mounting frame (1), and a clamping seat (26) is fixedly arranged on the two sets of second mounting plates (102) arranged opposite to each other, and the guide shaft (25) is clamped between the two clamping seats (26).

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