Forklift integrated orchard transport vehicle

Abstract

Aiming at the problem of non-uniform size of fruit boxes in orchard, low fruit collection and transportation efficiency and high cost, the application discloses a forklift integrated transportation vehicle for orchard, which mainly comprises a loading and adjusting device, a conveying and adjusting device and a transportation device. The forklift integrated transportation vehicle can realize forklift transportation of fruit boxes with different sizes by adjusting the distance between the two forks and the distance between the conveying tracks, and can realize stable loading and unloading of full fruit boxes or rapid tilting of empty fruit boxes by adjusting the loading and adjusting device to make the forks in a horizontal or inclined state. The four-wheel independent drive has high adaptability to uneven ground and high transportation efficiency.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of agricultural orchard transport equipment, and particularly relates to a fork and transport integrated orchard transport vehicle. BACKGROUND

[0002] With the rapid development of fruit industry in China, the output of fruits such as apples and pears increases by several hundred thousand tons per year, and the orchard is faced with the problems of insufficient labor, the need for forklifts to work with ordinary transport vehicles, poor adaptability to changes in the size of fruit boxes, single function, low transport efficiency, high cost and the like.

[0003] The size of fruit boxes used for fruit picking in orchards across the country varies, and ordinary transport vehicles need forklifts to cooperate with loading and unloading, which cannot meet the needs of stable and fast loading, unloading and transport of fruit boxes. Therefore, it is urgent to develop a fruit box transport vehicle integrated with fork and transport functions, which can adapt to fruit boxes of different sizes and has high transport efficiency, so as to replace the inefficient and time-consuming transport mode of ordinary transport vehicles and improve the economic benefits of fruit growers. SUMMARY

[0004] The present application discloses a fork and transport integrated orchard transport vehicle, wherein the operator adjusts the distance between the forks and the distance between the conveying tracks during operation, so that the orchard transport vehicle can load and unload fruit boxes of different sizes; the fork and transport functions of the orchard transport vehicle are integrated, and the orchard transport vehicle has the advantages of stable loading and unloading of full fruit boxes, fast unloading of empty fruit boxes and efficient transport of the whole vehicle.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0006] The fork and transport integrated orchard transport vehicle is composed of a loading and adjusting device, a conveying and adjusting device and a transport device; the loading and adjusting device is fixedly installed at the front end of the transport device, and the conveying and adjusting device is fixedly installed above the transport device; the transport device comprises a main frame, a double-head hydraulic cylinder, a wheel guard, a control console, a seat, a wheel, a rear axle, a three-side guardrail, a leaf spring, a wheel hub motor, a rear axle wheel hub motor connecting piece, a front axle, a connecting rod, a front axle wheel hub motor connecting piece, a double-head integrated piston rod, a movable box, a brake caliper and a brake disc; the main frame is hinged to the leaf spring fixedly connected to the upper sides of the front axle and the rear axle; the two ends of the rear axle are fixedly connected to the rear axle wheel hub motor connecting pieces fixedly connected to the inner shells of the wheel hub motors, and the two ends of the front axle are hinged to the front axle wheel hub motor connecting pieces fixedly connected to the inner shells of the wheel hub motors; the brake caliper is fixedly connected to the front axle wheel hub motor connecting pieces and the rear axle wheel hub motor connecting pieces, and the brake caliper and the brake disc fixedly connected to the outer shells of the wheel hub motors are braked by friction; the front axle wheel hub motor connecting pieces on the left side and the right side of the front axle are hinged to the double-head integrated piston rod of the double-head hydraulic cylinder fixedly installed on the main frame through the connecting rod; the control console and the seat are fixedly installed on the upper left side of the middle part of the main frame, and the movable box is fixedly installed on the upper right side of the middle part of the main frame; the hydraulic pump station and the battery pack are fixedly installed in the movable box; the three-side guardrail is fixedly installed on the left side, the right side and the rear side of the upper side of the main frame; and the wheel guard is fixedly installed on the two sides of the main frame and above the wheels.

[0007] The loading and adjusting device comprises forks, rollers, a fork distance adjusting mechanism, a lifting frame, an adjusting hydraulic cylinder, a lifting hydraulic cylinder, a machine body connecting frame and a supporting rod; the loading and adjusting device is fixedly connected to the front side of the main frame through the machine body connecting frame; the forks are provided with rollers, and the rear ends of the forks and the slide rods fixedly connected to the lifting frame constitute a movable pair capable of only sliding leftward and rightward; the two ends of the adjusting hydraulic cylinder, the lifting hydraulic cylinder and the supporting rod are respectively hinged to the lifting frame and the machine body connecting frame; the fork distance adjusting mechanism comprises a shaft end pinion of a small motor fixedly installed on the fork and a rack fixedly installed on the bottom outer side of the lifting frame.

[0008] The conveying and adjusting device comprises a conveying track, a track distance adjusting mechanism and a conveying driving mechanism; the conveying track is connected to the upper part of the main frame through the track distance adjusting mechanism, and the conveying driving mechanism is located at the rear part and the upper part of the conveying track.

[0009] The track distance adjusting mechanism comprises a distance adjusting slider, a distance adjusting guide rail, a large gear rack, a large gear, a large motor, a shaft coupling, a worm wheel, a worm, a large pin shaft and a fixed support; the distance adjusting slider is fixedly installed at the bottom of the conveying track, the distance adjusting guide rail is fixedly installed on the upper part of the main frame, the distance adjusting slider and the distance adjusting guide rail form a moving pair that slides left and right; one end of the large gear rack is fixedly connected perpendicularly to the bottom of the conveying track, the large gear and the worm wheel are coaxially connected to the large pin shaft, the large pin shaft and the main frame form a rotating pair, the large gear and the large gear rack are in meshing transmission; the worm and the fixed support fixedly installed on the main frame form a rotating pair, the worm and the large motor fixedly installed on the main frame are coaxially connected through the shaft coupling, the worm and the worm wheel are in meshing transmission.

[0010] The conveying driving mechanism comprises a conveying motor, a transmission, a driving sprocket, a driven sprocket and a chain; the conveying motor is fixedly connected to the rear part of the conveying track through the transmission, the driving sprocket is fixedly installed on the shaft end of the transmission, the driven sprocket is installed on the front end of the conveying track, and the chain is simultaneously linked to the driving sprocket at the rear part of the conveying track and the driven sprocket at the front end of the conveying track; the conveying position of the chain is higher than the upper surface of the conveying track; the conveying motor drives the driving sprocket to reciprocating rotate through the transmission, so that the chain reciprocating moves.

[0011] Working principle: the orchard transport vehicle is powered by a battery pack. The control system of the console realizes independent driving of the four wheels by the four wheel hub motors and coordinated work. Through the operation of the console, the small motor controls the distance between the forks, the large motor controls the distance between the conveying tracks, the conveying driving motor controls the conveying demand, and the driving, steering and braking are controlled. The hydraulic pump station converts electrical energy into hydraulic energy to provide hydraulic power for the fork loading and unloading fruit boxes, front wheel steering and brake caliper braking. Through the hydraulic control operation of the console, the steering and braking are controlled. The steering function is realized by the double-head integrated piston rod of the double-head hydraulic cylinder pushing the wheel hub motor and the wheel to rotate through the connecting rod. The braking function is realized by the friction between the brake caliper and the brake disc.

[0012] The distance between the forks is adjusted by the meshing transmission of the pinion and the gear rack. By adjusting the adjusting hydraulic cylinder and the lifting hydraulic cylinder, the full load fruit boxes on the ground are kept horizontal and transported to the conveying device, or the full load fruit boxes on the conveying device are kept horizontal and transported to the ground, or the empty fruit boxes on the ground are transported to the conveying device in a horizontal or inclined manner, or the forks are quickly unloaded in an inclined state.

[0013] In the conveying and adjusting device, the distance adjusting slider and the distance adjusting guide rail constitute a moving pair to support the conveying track; the large motor drives the worm gear and the large gear wheel to rotate synchronously through the shaft coupling, the worm gear and the worm wheel, and the distance of the conveying track is adjusted by the meshing transmission of the large gear wheel and the two racks. In the conveying driving mechanism, the conveying motor drives the driving sprocket to rotate through the transmission, so that the chain on the upper side of the conveying device drives the fruit box to make a reciprocating linear conveying motion.

[0014] The beneficial effects of the present application are:

[0015] (1) The orchard transport vehicle is four-wheel independent driving, has good climbing and uneven ground transportation capacity, reasonable and reliable structure, and can adapt to the transportation needs of orchards with various types of landforms;

[0016] (2) The orchard transport vehicle integrates the functions of forking, unloading and transporting fruit boxes into one, avoids the investment of multiple vehicles and multiple operators, improves the collection and transportation efficiency, and reduces the collection and transportation cost;

[0017] (3) The orchard transport vehicle can fork and transport fruit boxes of different sizes, greatly improving the adaptability of the orchard transport vehicle to fruit boxes.

[0018] In summary, the orchard transport vehicle has strong adaptability to orchard topography and fruit box specifications, integrates multiple functions into one, reduces the investment of manpower, material resources and financial resources, and guarantees the collection and transportation efficiency of the whole vehicle, thereby improving the economic benefits of fruit farmers. BRIEF DESCRIPTION OF DRAWINGS

[0019] The present application will be further described below in conjunction with the drawings and examples:

[0020] Figure 1 is a schematic diagram of the whole structure of the present application.

[0021] Figure 2 is a schematic diagram of the transport device of the present application.

[0022] Figure 3 is a schematic diagram of the rear axle connection of the present application.

[0023] Figure 4 is a schematic diagram of the front axle connection of the present application.

[0024] Figure 5 is a schematic diagram of the loading and adjusting device of the present application.

[0025] Figure 6 is a schematic diagram of the fork distance adjusting mechanism of the present application.

[0026] Figure 7 is a schematic diagram of the conveying and adjusting device of the present application.

[0027] Figure 8Figure 2 is a magnified view of the distance-adjustable guide rail moving pair in the conveying and adjusting device of the present application.

[0028] Figure 9 Figure 3 is a meshing sectional view of the large gear in the conveying and adjusting device of the present application.

[0029] Figure 10 Figure 4 is a schematic view of the conveying drive mechanism after the chain is removed in the conveying and adjusting device of the present application.

[0030] List of numbers in the figures: 1. loading and adjusting device, 2. conveying and adjusting device, 3. transport device, 111. fork, 112. roller, 113. fork distance-adjusting mechanism, 114. lifting frame, 115. adjusting hydraulic cylinder, 116. lifting hydraulic cylinder, 117. body connecting frame, 118. support rod, 122. small motor, 123. pinion, 124. rack, 125. sliding rod, 126. baffle, 212. distance-adjusting sliding block, 213. distance-adjusting guide rail, 214. conveying rail, 215. rail distance-adjusting mechanism, 216. conveying drive mechanism, 221. large rack, 222. large gear, 223. large motor, 224. coupling, 225. worm gear, 226. worm, 227. large pin, 228. fixed support, 231. conveying motor, 232. transmission, 233. drive sprocket, 234. driven sprocket, 235. chain, 311. main frame, 312. double-headed hydraulic cylinder, 313. wheel guard, 314. control console, 315. seat, 316. wheel, 317. rear axle, 318. three-side guardrail, 319. leaf spring, 320. wheel hub motor, 321. rear axle wheel hub motor connecting piece, 322. front axle, 323. connecting rod, 324. front axle wheel hub motor connecting piece, 325. double-headed integrated piston rod, 326. movable box, 328. brake caliper, 329. brake disc, 331. hydraulic pump station, 332. battery pack. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings of the embodiments of the present application to Figures 1 to 10 The technical solutions in the embodiments of the present application are clearly and completely described. The front end, rear end and the like involved in the text are words describing the positional relationship of parts, all of which are taken as the reference datum. Figure 1 The front end refers to the position of the loading and adjusting device 1 of the transport vehicle, and the direction opposite to the front end is the rear end. The left side refers to the side where the control console and the seat are located, and the side opposite to the left side is the right side.

[0032] As shown in the drawings, Figures 1 to 10As shown, the embodiment of the present application provides a fork transportation integrated orchard transport vehicle, mainly composed of loading and adjusting device 1, conveying and adjusting device 2 and transportation device 3; the loading and adjusting device 1 is fixedly installed at the front end of the transportation device 3, the conveying and adjusting device 2 is fixedly installed directly above the transportation device 3; the transportation device 3 includes main frame 311, double-head hydraulic cylinder 312, wheel guard plate 313, control console 314, seat 315, wheel 316, rear axle 317, three-side guardrail 318, leaf spring 319, wheel hub motor 320, rear axle wheel hub motor connecting piece 321, front axle 322, connecting rod 323, front axle wheel hub motor connecting piece 324, double-head integrated piston rod 325, active box 326, brake caliper 328 and brake disc 329; the transportation device 3 is driven to move by the four independent wheel hub motors 320 under the control of the control system of the control console 314.

[0033] The main frame 311 is designed to be left-right symmetrical, the lower rear part is hingedly connected with one end of the rear leaf spring 319 and movably hingedly connected with the other end; the rear leaf spring 319 is fixedly installed below the rear axle 317 on both sides through U-shaped bolts; the rear axle 317 is fixedly connected with the rear axle wheel hub motor connecting piece 321 at both ends; the rear axle wheel hub motor connecting piece 321 is fixedly connected with the inner housing of the wheel hub motor 320, and the brake caliper 328 is fixedly installed on the rear axle wheel hub motor connecting piece 321; the outer housing of the wheel hub motor 320 is fixedly connected with the wheel 316, and the brake disc 329 is fixedly installed on the outer housing of the wheel hub motor 320; the brake pad of the brake caliper 328 can frictionally brake the brake disc 329.

[0034] The lower front part of the main frame 311 is hingedly connected with one end of the front leaf spring 319 and movably hingedly connected with the other end; the front leaf spring 319 is fixedly installed below the front axle 322 on both sides through U-shaped bolts; the front axle 322 is hingedly connected with the front axle wheel hub motor connecting piece 324 at both ends, the front axle wheel hub motor connecting piece 324 is fixedly connected with the inner housing of the wheel hub motor 320 and hingedly connected with the connecting rod 323; the connecting rod 323 is hingedly connected with the double-head integrated piston rod 325 of the double-head hydraulic cylinder 312 fixedly installed on the main frame 311. The double-head hydraulic cylinder 312 is controlled by the control console 314 to push the double-head integrated piston rod 325 to move leftward or rightward, thereby pushing the connecting rod 323 to swing the two front wheels 316 leftward and rightward, so as to realize the steering of the transport vehicle.

[0035] The main frame 311 is fixedly installed with wheel guards 313 above the wheels 316 on both sides; the control console 314 and the seat 315 are fixedly installed on the upper left side of the middle part of the main frame 311; the movable box 326 is fixedly installed on the upper right side of the middle part of the main frame 311, and the hydraulic pump station 331 and the battery pack 332 are fixedly installed in the movable box 326; the three-side guardrails 318 are fixedly connected to the upper sides of the left side, the right side and the rear side of the main frame 311; the battery pack 332 provides power energy for all the motors and the motors in the hydraulic pump station 331; the hydraulic pump station 331 provides hydraulic power for all the hydraulic cylinders, and the control console 314 controls the actions of all the motors and all the hydraulic cylinders.

[0036] The loading and adjusting device 1 comprises forks 111, rollers 112, fork distance adjusting mechanisms 113, lifting frames 114, adjusting hydraulic cylinders 115, lifting hydraulic cylinders 116, body connecting frames 117 and support rods 118; the fork distance adjusting mechanism 113 comprises a small motor 122, a small gear 123, a small rack 124, sliding rods 125 and baffles 126; the loading and adjusting device 1 is fixedly installed at the most front end of the main frame 311 of the transport device 3 through the body connecting frame 117. The loading and adjusting device 1 is designed to be left-right symmetrical; the fork 111 is provided with the roller 112, the fork 111 has two, the rear end and the two sliding rods 125 form a movable pair that can only slide left and right; the two sliding rods 125 are parallel and pass through the middle support fixed on the lifting frame 114, the two ends pass into the through holes on the two sides of the lifting frame 114, and the holes are blocked by the baffles 126 fixed on the lifting frame 114; the piston end and the cylinder end of the adjusting hydraulic cylinder 115 are respectively hinged to the lifting frame 114 and the body connecting frame 117; the piston end and the cylinder end of the lifting hydraulic cylinder 116 are respectively hinged to the lifting frame 114 and the body connecting frame 117; the front end and the rear end of the support rod 118 are respectively hinged to the lifting frame 114 and the body connecting frame 117; the small motor 122 is fixedly installed at the bottom side of the fork 111; the small gear 123 is fixedly installed on the shaft end of the small motor 122; the small rack 124 is fixed on the bottom front side of the lifting frame 114 and is engaged with the small gear 123; the loading and adjusting device 1 is driven by the engagement between the small gear 123 on the shaft end of the small motor 122 and the small rack 124 to realize the distance adjustment of the two forks 111.

[0037] The conveying and adjusting device 2 comprises a conveying track 214, a track pitch adjusting mechanism 215 and a conveying drive mechanism 216; the conveying track 214 is connected to the upper part of the main frame 311 through the track pitch adjusting mechanism 215, and the conveying drive mechanism 216 is located at the rear and upper part of the conveying track 214. The track pitch adjusting mechanism 215 comprises a pitch adjusting slider 212, a pitch adjusting guide rail 213, a large gear rack 221, a large gear 222, a large motor 223, a shaft coupling 224, a worm wheel 225, a worm 226, a large pin shaft 227 and a fixed support 228; the pitch adjusting slider 212 is fixedly installed at the lower part of the conveying track 214, the pitch adjusting guide rail 213 is fixedly installed at the upper part of the main frame 311, and the pitch adjusting guide rail 213 and the pitch adjusting slider 212 form a movable pair capable of sliding left and right, supporting the conveying track 214;

[0038] One end of the large gear rack 221 is fixedly installed vertically at the bottom of the conveying track 214, and the toothed rack side is engaged with the large gear 222; the large gear 222 and the worm wheel 225 are fixedly connected on the large pin shaft 227 through a key; the large pin shaft 227 forms a rotating pair with the main frame 311; the worm 226 forms a rotating pair with the fixed support 228 fixed on the main frame 311; the worm 226 is engaged with the worm wheel 225 for transmission; the worm 226 is coaxially connected with the large motor 223 fixedly installed at the upper part of the main frame 311 through the shaft coupling 224. The large motor 223 drives the worm wheel 225 to reciprocating rotate through the worm 226, so that the large gear 222 drives the large gear rack 221 to make reciprocating linear motion, thereby achieving the pitch adjustment of the two conveying tracks 214;

[0039] The conveying drive mechanism 216 comprises a conveying motor 231, a speed changer 232, a drive sprocket 233, a driven sprocket 234 and a chain 235; the conveying motor 231 is fixedly installed in the rear inner side of the conveying track 214 through the speed changer 232; the output shaft of the speed changer 232 is fixedly installed with the drive sprocket 233 at the shaft end; the conveying track 214 is provided with the driven sprocket 234 at the front end; the chain 235 is simultaneously linked at the front and rear parts to the drive sprocket 233 and the driven sprocket 234; the conveying position of the chain 235 is higher than the upper surface of the conveying track 214; the conveying motor 231 drives the chain 235 to reciprocating rotate through the speed changer 232 and the drive sprocket 233 according to the control requirement of the control console 314, so that the chain 235 drives the fruit box thereon to make reciprocating linear motion.

[0040] The specific operation method of the fruit garden transport vehicle with the integrated forklift is as follows:

[0041] The orchard transport vehicle is powered by the battery pack 332, and the console 314 drives the electric motor, and the electric motor in the hydraulic pump station 331 converts the electric energy into hydraulic energy to drive the hydraulic cylinder. The operator controls the hub motor 320 and the hydraulic cylinder through the console 314 to complete the fruit box loading and unloading and transportation operation.

[0042] Before the fruit box is picked up, the console 314 is used to control the small motor 122 and the large motor 223 to rotate, respectively adjusting the distance between the two forks 111 and the distance between the two conveying tracks 214 to match the size of the fruit box.

[0043] When the full fruit box is loaded, the console 314 controls the hub motor 320 to drive the transport vehicle to move forward, the loading and adjusting device 1 forks into the bottom of the fruit box, and the console 314 controls the adjusting hydraulic cylinder 115 and the lifting hydraulic cylinder 116 to extend and retract to realize the lifting of the fruit box. During the lifting process, the fruit box is kept in a stable and horizontal state with the ground. When the rear end of the fork 111 is in contact with the chain 235, the lifting is stopped. Then the front end of the fork 111 is slightly higher than the rear end. The fruit box contacts the chain 235 under the action of its own gravity. The console 314 controls the conveying motor 231 to rotate, so that the chain 235 moves backward with the full fruit box. Then the console 314 controls the adjusting hydraulic cylinder 115 and the lifting hydraulic cylinder 116 to return to the original position. The above operation is repeated until the conveying track 214 is full of full fruit boxes, and the loading of the full fruit box is completed. The unloading process of the full fruit box is the reverse process of the loading process. The console 314 only needs to operate in reverse to complete the unloading process. When the empty fruit box is loaded, the fork 111 can be adjusted to be in contact with the conveying track 214 at the rear end and close to the ground at the front end. The console 314 controls the hub motor 320 to rotate to make the transport vehicle move forward. The empty fruit box slides onto the fork 111 under the pushing force of the transport vehicle. When the fruit box contacts the chain 235, the conveying motor 231 rotates to convey the fruit box along the conveying track 214. The above operation is repeated until the conveying track 214 is full of empty fruit boxes, and the loading of the empty fruit box is completed. The unloading process of the empty fruit box is the reverse process of the loading process. The console 314 only needs to operate in reverse to complete the unloading process, so as to realize the rapid loading and unloading of the empty fruit box.

[0044] The transport vehicle uses the console 314 to control the double-head integrated piston rod 325 of the double-head hydraulic cylinder 312 to move left or right, realizes the front wheel steering function of the orchard transport vehicle, and uses the friction between the brake caliper 328 and the brake disc 329 to realize the braking function of the transport vehicle.

[0045] The specific embodiment is only a preferred mode of the present application, not all embodiments, and non-creative modifications made by researchers in the technical field according to the present application should be regarded as the protection scope of the present application.

Claims

1. A fruit orchard transport vehicle integrating forking and transporting, which is composed of a loading and adjusting device, a conveying and adjusting device and a transporting device; characterized in that: The loading and adjusting device is fixedly installed at the front end of the transport device, and the conveying and adjusting device is fixedly installed above the transport device; the transport device comprises a main frame, a double-head hydraulic cylinder, a wheel guard, a control console, a seat, a wheel, a rear axle, a three-side guardrail, a leaf spring, a wheel hub motor, a rear axle wheel hub motor connecting piece, a front axle, a connecting rod, a front axle wheel hub motor connecting piece, a double-head integrated piston rod, a movable box, a brake caliper and a brake disc; the main frame is hingedly connected with the leaf spring fixedly connected above the front and rear axles; the two ends of the rear axle are fixedly connected with the rear axle wheel hub motor connecting pieces fixedly connected with the inner shell of the wheel hub motor, and the two ends of the front axle are hingedly connected with the front axle wheel hub motor connecting pieces fixedly connected with the inner shell of the wheel hub motor; the brake caliper is fixedly connected with the front and rear axle wheel hub motor connecting pieces, and the brake caliper and the brake disc fixedly connected with the outer shell of the wheel hub motor are frictionally braked; the front axle wheel hub motor connecting pieces on the left and right sides of the front axle are hingedly connected with the double-head integrated piston rod of the double-head hydraulic cylinder fixedly installed on the main frame through the connecting rod; the control console and the seat are fixedly installed on the left side of the middle part of the main frame, and the movable box is fixedly installed on the right side of the middle part of the main frame; the movable box is internally fixedly installed with a hydraulic pump station and a battery pack; the three-side guardrail is fixedly installed on the left and right and rear side positions above the main frame; and the wheel guard is fixedly installed on the left and right sides of the main frame and above the wheel. The loading and adjusting device comprises a fork, a roller, a fork distance adjusting mechanism, a lifting frame, an adjusting hydraulic cylinder, a lifting hydraulic cylinder, a machine body connecting frame and a supporting rod; the loading and adjusting device is fixedly connected with the front side of the main frame through the machine body connecting frame; the fork is internally provided with the roller, and the rear end of the fork and the slide rod fixedly connected with the lifting frame form a movable pair capable of only relatively sliding left and right; the two ends of the adjusting hydraulic cylinder, the lifting hydraulic cylinder and the supporting rod are respectively hingedly connected with the lifting frame and the machine body connecting frame; the fork distance adjusting mechanism comprises a small gear fixedly installed on the shaft end of a small motor on the fork and a rack fixedly installed on the bottom outer side of the lifting frame. The conveying and adjusting device comprises a conveying track, a track distance adjusting mechanism and a conveying driving mechanism; the conveying track is connected with the upper part of the main frame through the track distance adjusting mechanism, and the conveying driving mechanism is located at the rear part and the upper part of the conveying track; The track distance adjusting mechanism comprises a distance adjusting slide block, a distance adjusting guide rail, a large gear rack, a large gear, a large motor, a shaft coupling, a worm gear, a worm, a large pin shaft and a fixed support; the distance adjusting slide block is fixedly installed on the bottom of the conveying track, the distance adjusting guide rail is fixedly installed on the upper part of the main frame, and the distance adjusting slide block and the distance adjusting guide rail form a movable pair capable of sliding left and right; one end of the large gear rack is vertically fixedly connected with the bottom of the conveying track, the large gear and the worm gear are coaxially connected on the large pin shaft, the large pin shaft and the main frame form a rotating pair, and the large gear and the large gear rack are in mesh transmission; the worm and the fixed support fixedly installed on the main frame form a rotating pair, the worm and the large motor fixedly installed on the main frame are coaxially connected through the shaft coupling, and the worm and the worm gear are in mesh transmission. The conveying drive mechanism comprises a conveying motor, a transmission, a driving chain wheel, a driven chain wheel and a chain; the conveying motor is fixedly connected to the rear part of the conveying track through the transmission; the driving chain wheel is fixedly installed on the shaft end of the transmission; the driven chain wheel is installed on the front end of the conveying track; the chain is simultaneously linked to the driving chain wheel at the rear part of the conveying track and the driven chain wheel at the front end of the conveying track; the position of the chain is higher than the upper surface of the conveying track; the conveying motor drives the driving chain wheel to reciprocating rotate through the transmission, so as to make the chain reciprocating move.

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