Jacking ultra-thin four-way shuttle provided with cam linked with worm gear and worm screw

Abstract

A jacking ultra-thin four-way shuttle provided with a cam linked with a worm gear and worm screw, said shuttle comprising: a vehicle frame (100); a lifting and direction-changing mechanism (200), comprising a lifting motor (201), a worm screw (202), a worm gear (204), a lifting transmission shaft (206), a cam-crank (207), a liftable frame (208), and a liftable supporting plate (209), the lifting motor (201) driving the worm screw (202) to rotate, the worm screw (202) driving the worm gear (204) to rotate, the worm gear (204) by means of the lifting transmission shaft (206), driving the cam-crank (207) to rotate, and the cam-crank (207) being rotatably provided on the liftable frame (208); and a traveling assembly (300), comprising a main rail traveling assembly and a sub-rail traveling assembly that are driven by a moving motor (301) at the same time, the sub-rail traveling assembly being provided on the vehicle frame (100), and the main rail traveling assembly being provided on the liftable frame (208). The worm gear (204) and the worm screw (202) drive the cam-crank (207) to rotate in order to achieve jacking and direction-changing, such that the overall height of the shuttle is reduced, greatly compressing the height of the whole vehicle, which saves more space, and can increase the utilization rate of a warehouse.

Description

A worm gear linkage cam lifting type ultra-thin four-way shuttle Technical Field

[0001] The invention relates to the technical field of shuttle vehicles, in particular to a worm gear linked cam lifting type ultra-thin four-directional shuttle vehicle. Background Art

[0002] At present, due to the increasing requirements for warehouse storage capacity, the requirements for picking, transportation, and the frequency of inbound and outbound operations are also increasing. At present, in the field of logistics and warehousing, automation and intelligent control technologies have been rapidly developed, and the application of shelf shuttle vehicles in the field of automatic warehouses is becoming more and more extensive. The four-way shuttle vehicle is a new type of automated warehousing equipment that integrates the functions of traditional mother and child vehicles, and realizes the functions of two vehicles with one vehicle. Shuttle racking is a high-capacity, high-efficiency racking. When working, the four-way shuttle vehicle completes the storage and retrieval of goods on the straight track, and completes the change of shelf aisles through the turning plate and transverse track. Compared with ordinary racking, shuttle racking does not require forklifts to enter the interior of the rack to store and retrieve goods. The smaller four-way shuttle vehicle directly enters one or more aisles of the rack to store and retrieve goods. It can change direction along the longitudinal or transverse tracks on the cross track, so as to reach any designated cargo location in the warehouse according to order requirements, realizing dense storage and transportation, and greatly improving work efficiency compared to using forklifts.

[0003] For this purpose, we propose a worm gear linkage cam lifting type ultra-thin four-way shuttle. Technical issues

[0004] Existing shuttles are prone to oil leakage during hydraulic drive, which can contaminate cargo and shorten the life of oil lines due to aging. In addition, shuttles are large in size and high in height, resulting in low space utilization. Technical Solutions

[0005] In response to the shortcomings of the above-mentioned existing production technology, a worm gear linked cam lifting type ultra-thin four-way shuttle is provided, which drives the cam crank to rotate by the worm gear and worm to perform lifting and reversing, so that the overall height of the shuttle is lower, which greatly compresses the height of the entire vehicle, saves more space, and can improve the utilization rate of the warehouse.

[0006] The technical solutions adopted in the present invention are as follows:

[0007] A worm gear linkage cam lifting type ultra-thin four-way shuttle vehicle, comprising:

[0008] Frame;

[0009] The lifting reversing mechanism includes a lifting motor, a worm, a worm gear, a lifting transmission shaft, a cam crank, a lifting frame, and a lifting support plate. The lifting motor drives the worm to rotate, the worm drives the worm gear to rotate, and the worm gear drives the cam crank to rotate through the lifting transmission shaft. The cam crank is rotatably arranged on the lifting frame, the lifting frame is movably arranged in the vehicle frame, and the lifting support plate is movably placed on the lifting frame.

[0010] The traveling assembly includes a main track traveling assembly and a sub-track traveling assembly, and is driven simultaneously by a moving motor. The sub-track traveling assembly is arranged on the vehicle frame, and the main track traveling assembly is arranged on the lifting frame.

[0011] Among them, as the cam crank rotates downward, it can drive the lifting frame and the lifting support plate to rise, and as the cam crank rotates upward, it can drive the lifting support plate to rise.

[0012] It is further characterized by:

[0013] It also includes electrical components, which include a discharge component, a control unit, a positioning component, a lifting and positioning component, a reading component, a display component and a charging component. The discharge component, the control unit and the positioning component are arranged on the vehicle frame, and the lifting and positioning component, the reading component, the display component and the charging component are arranged on the lifting frame.

[0014] The lifting and reversing mechanism and the traveling assembly are symmetrically arranged in the vehicle frame.

[0015] The sub-rail walking assembly includes a sub-rail walking transmission shaft 1, a sub-rail walking transmission shaft 2, a sub-rail walking transmission shaft 3, a sub-rail walking transmission shaft 4, a sub-rail walking active assembly and a sub-rail walking driven assembly, the sub-rail walking transmission shaft 1 is connected to the sub-rail walking transmission shaft 2 by a coupling, the sub-rail walking transmission shaft 3 and the sub-rail walking transmission shaft 4 are also connected by a coupling, the sub-rail walking transmission shaft 1 and the sub-rail walking transmission shaft 2 are both provided with a sub-rail walking active assembly, the sub-rail walking transmission shaft 3 and the sub-rail walking transmission shaft 4 are both provided with a sub-rail walking driven assembly, a sprocket is provided on the output shaft of the mobile motor, a sprocket is provided on the sub-rail walking transmission shaft 2, and is connected to the sprocket on the mobile motor through a chain, the sub-rail walking transmission shaft 1, the sub-rail walking transmission shaft 2, the sub-rail walking transmission shaft 3 and the sub-rail walking transmission shaft 4 are also provided with sprockets, and the sub-rail walking transmission shaft 1 and the sprocket on the sub-rail walking transmission shaft 3 are connected by a chain, and the sub-rail walking transmission shaft 2 and the sprocket on the sub-rail walking transmission shaft 4 are connected by a chain.

[0016] The main track travel assembly includes a main track travel transmission shaft, a main track travel active assembly and a main track travel driven assembly. Two main track travel transmission shafts are provided, and the two main track travel transmission shafts are rotatably set on the frame. A sprocket and a bevel gear are respectively provided at both ends of the main track travel transmission shaft. An active bevel gear matching the bevel gear is provided on the sub-track travel transmission shaft 2 and the sub-track travel transmission shaft 4. A sprocket corresponding to the sprocket on the main track travel transmission shaft is provided on the main track travel active assembly and the main track travel driven assembly, and the sprockets are connected by a chain.

[0017] The lifting motor is fixed in the frame, and two worms are provided. The two worms are connected by a lifting coupling, and the worm is fixed in the frame through a bearing seat. A sprocket is provided on one worm, and a lifting sprocket is connected to the output shaft of the lifting motor. The lifting sprocket and the sprocket on the worm are connected by a chain. The worm wheel is correspondingly arranged above the worm, and the worm and the worm wheel cooperate to drive the rotation of the worm wheel through the rotation of the worm. The worm wheel is fixed on the lifting transmission shaft, and the lifting transmission shaft is fixed to the frame through a bearing seat. Cam cranks are provided at both ends of the lifting transmission shaft.

[0018] The cam end of the cam crank is placed in a straight groove of the lifting frame, and the straight groove is a horizontal groove.

[0019] The lifting support plate is movably arranged above the lifting frame. Guide shafts are arranged at both ends of the lifting support plate. The guide shafts are arranged in the sliding grooves of the frame to limit and guide the lifting support plate.

[0020] The vehicle frame includes a bottom plate, and a main track side plate 1, a sub-track side plate 1, a sub-track side plate 2, and a main track side plate 2 arranged on the bottom plate.

[0021] A guide groove is arranged in the vehicle frame, a lifting frame is arranged in the guide groove, and wear-resistant graphite brass blocks are arranged at both ends of the lifting frame. Beneficial effects

[0022] The invention has a compact and reasonable structure and is easy to operate. The worm gear and the worm drive the cam crank to rotate for lifting and reversing, so that the overall height of the trolley is relatively low, which greatly compresses the height of the whole vehicle, saves more space, and can improve the utilization rate of the warehouse.

[0023] At the same time, the present invention also has the following advantages:

[0024] (1) The lifting reversing mechanism adopts a purely mechanical structure to avoid oil leakage during hydraulic drive, solve the problem of cargo contamination caused by oil leakage and the problem of short service life of oil circuit aging, thereby improving the service life of the trolley.

[0025] (2) The self-locking of the worm wheel and worm can effectively solve the problem of falling when carrying heavy objects.

[0026] (3) When the cam crank rotates downward, the cam crank drives the lifting frame and the lifting plate to move upward; when the cam crank rotates upward, the cam crank only drives the lifting plate to move upward; when the cam crank rotates to the left and right sides, the cam crank does not drive the lifting frame to move upward, nor does it drive the lifting plate to move upward.

[0027] (4) The lifting and reversing mechanism and the traveling components are symmetrically arranged on the left and right sides of the frame. This layout makes the center of gravity of the trolley more stable when traveling and is not easy to overturn.

[0028] (5) Using the entire vehicle body to bear the load not only ensures the stability and safety of the cargo, but also makes it less likely to tilt or malfunction during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] FIG1 is a schematic diagram of the overall structure of the present invention.

[0030] FIG2 is a schematic diagram of the frame structure of the present invention.

[0031] FIG3 is a schematic diagram of the traveling assembly and the frame structure of the present invention.

[0032] FIG4 is a schematic diagram of the lifting and reversing mechanism and the frame structure of the present invention.

[0033] FIG5 is a schematic cross-sectional view taken along line AA in FIG4 .

[0034] FIG6 is a cross-sectional view taken along line BB in FIG4 .

[0035] FIG7 is a schematic diagram of the electrical components and the frame structure of the present invention.

[0036] FIG8 is a schematic structural diagram of the four-way shuttle vehicle of the present invention running on a sub-track and lifting cargo.

[0037] FIG9 is a schematic diagram of the mechanism of the four-way shuttle of the present invention traveling on the sub-track.

[0038] FIG10 is a schematic diagram of the mechanism of the four-way shuttle vehicle of the present invention traveling on the main track.

[0039] Among them: 100, frame; 101, main track side plate 1; 102, sub-track side plate 1; 103, sub-track side plate 2; 104, main track side plate 2; 105, bottom plate; 200, lifting reversing mechanism; 201, lifting motor; 202, worm; 203, lifting coupling; 204, worm gear; 205, lifting sprocket; 206, lifting transmission shaft; 207, cam crank; 208, lifting frame; 209, lifting pallet; 300, travel assembly; 301, mobile motor; 302, sub-track travel transmission shaft 1; 303, sub-track travel transmission shaft 2; 304, bevel gear; 305, main track travel transmission shaft; 3 06. Main track travel active component; 307. Sub-track travel transmission shaft three; 308. Sub-track travel transmission shaft four; 309. Coupling; 310. Sub-track travel active component; 311. Sub-track travel driven component; 312. Main track travel driven component; 400. Electrical component; 401. Discharge component; 402. Control unit; 403. Positioning component; 404. Lifting and positioning component; 405. Reading component; 406. Display component; 407. Charging component. Modes for Carrying Out the Invention

[0040] As shown in Figure 1, a worm gear-linked cam-lifting ultra-thin four-way shuttle includes a frame 100, a lifting and reversing mechanism 200, a traveling assembly 300 and an electrical assembly 400. The frame 100 is used to carry the lifting and reversing mechanism 200, the traveling assembly 300 and the electrical assembly 400, and the shuttle is driven to move by the traveling assembly 300. The lifting and reversing mechanism 200 is used to make the traveling assembly 300 reverse its movement. The electrical assembly 400 is used to control the lifting and reversing mechanism 200 and the traveling assembly 300.

[0041] As shown in FIG2 , the vehicle frame 100 includes a main rail side plate 101, a sub-rail side plate 102, a sub-rail side plate 103, a main rail side plate 104, and a base plate 105. The main rail side plate 101, the sub-rail side plate 102, the sub-rail side plate 103, and the main rail side plate 104 are all disposed on the base plate 105. The main rail side plate 101 is disposed correspondingly to the main rail side plate 104, and the sub-rail side plate 102 is disposed correspondingly to the sub-rail side plate 103.

[0042] As shown in Figures 4 to 6, the lifting reversing mechanism 200 includes a lifting motor 201, a worm 202, a lifting coupling 203, a worm wheel 204, a lifting transmission shaft 206, a cam crank 207, a lifting frame 208 and a lifting support plate 209. The lifting motor 201 is fixed in the frame 100. Two worms 202 are provided. The two worms 202 are connected by a lifting coupling 203. The worm 202 is fixed in the frame 100 through a bearing seat. A sprocket is provided on one worm 202. A lifting sprocket 205 is connected to the output shaft of the lifting motor 201. The lifting sprocket 205 and the sprocket on the worm 202 are connected by a chain. The worm wheel 204 is correspondingly arranged above the worm 202, and the worm 202 and the worm wheel 204 are matched. The rotation of the worm 202 drives the rotation of the worm gear 204. The worm gear 204 is fixed to the lifting transmission shaft 206, which is fixed to the frame 100 through a bearing seat. Cam cranks 207 are placed at both ends of the lifting transmission shaft 206. The cam ends of the cam cranks 207 are placed in the straight grooves of the lifting frame 208. The frame 100 is provided with a guide groove, and the lifting frame 208 is set in the guide groove. Wear-resistant graphite brass blocks are set at both ends of the lifting frame 208. The lifting support plate 209 is movably arranged above the lifting frame 208. Guide shafts are set at both ends of the lifting support plate 209. The guide shafts are set in the slide grooves of the frame 100 to restrict the lifting support plate 209 so that the lifting support plate 209 can only move up and down. The lifting reversing mechanism 200 is set on both sides.

[0043] The output shaft of the lifting motor 201 drives the lifting sprocket 205 to rotate, which in turn drives the worm 202 to rotate through the chain and sprocket, which in turn drives the worm wheel 204 to rotate, and then drives the cam crank 207 to rotate through the lifting transmission shaft 206;

[0044] As shown in FIG10 , when the cam crank 207 rotates downward, the lifting frame 208 and the lifting support plate 209 are driven to move upward by the cam crank 207 ;

[0045] As shown in FIG8 , when the cam crank 207 rotates upward, the cam crank 207 only drives the lifting support plate 209 to move upward; the self-locking of the worm wheel 204 and the worm 202 can effectively prevent the possible falling of the loaded object.

[0046] As shown in FIG9 , when the cam crank 207 rotates to the left and right sides, the cam crank 207 does not drive the lifting frame 208 to move upward, nor does it drive the lifting support plate 209 to move upward.

[0047] The lifting reversing mechanism 200 adopts a purely mechanical structure to avoid oil leakage during the hydraulic drive process, solves the problem of cargo contamination caused by oil leakage and the problem of short service life of oil circuit aging, thereby increasing the service life of the trolley.

[0048] As shown in Figure 3, the walking component 300 includes a main track walking component, a sub-track walking component and a moving motor 301, and the moving motor 301 is fixed on the frame 100; the sub-track walking component includes a sub-track walking transmission shaft 1 302, a sub-track walking transmission shaft 2 303, a sub-track walking transmission shaft 3 307, a sub-track walking transmission shaft 4 308, a sub-track walking active component 310 and a sub-track walking driven component 311, the sub-track walking transmission shaft 1 302 and the sub-track walking transmission shaft 2 303 are connected by a coupling 309, and the sub-track walking transmission shaft 307 and the sub-track walking transmission shaft 4 308 are also connected by a coupling 309, and the sub-track walking transmission shaft 1 302 and the sub-track walking transmission shaft 2 303 are both provided with A sub-track walking active component 310 is provided, and a sub-track walking driven component 311 is provided on the sub-track walking transmission shaft 307 and the sub-track walking transmission shaft 4 308. A sprocket is provided on the output shaft of the mobile motor 301, and a sprocket is provided on the sub-track walking transmission shaft 2 303, and is connected to the sprocket on the mobile motor 301 through a chain. Sprockets are also provided on the sub-track walking transmission shaft 1 302, the sub-track walking transmission shaft 2 303, the sub-track walking transmission shaft 3 307 and the sub-track walking transmission shaft 4 308, and the sub-track walking transmission shaft 1 302 is connected to the sprocket on the sub-track walking transmission shaft 3 307 through a chain, and the sub-track walking transmission shaft 2 303 is connected to the sprocket on the sub-track walking transmission shaft 4 308 through a chain;

[0049] The main track travel component includes a main track travel transmission shaft 305, a main track travel active component 306 and a main track travel driven component 312. Two main track travel transmission shafts 305 are provided, and the two main track travel transmission shafts 305 are rotatably set on the frame 100. A sprocket and a bevel gear 304 are respectively provided at both ends of the main track travel transmission shaft 305. A driving bevel gear matching the bevel gear 304 is provided on the sub-track travel transmission shaft 2 303 and the sub-track travel transmission shaft 4 308. The main track travel active component 306 and the main track travel driven component 312 are both provided with sprockets corresponding to the sprockets on the main track travel transmission shaft 305, and are connected by a chain.

[0050] When the moving motor 301 is working, the output shaft of the moving motor 301 drives the sprocket on it to rotate, and then drives the sprocket on the sub-track walking transmission shaft 2 303 to rotate through the chain, and then drives the sub-track walking transmission shaft 2 303 to rotate, drives the sub-track walking active component 310 to rotate, and then drives the sub-track walking driven component 311 to rotate through the cooperation of the sprocket and chain; at the same time, the sub-track walking transmission shaft 2 303 drives the bevel gear 304 to rotate through the active bevel gear on it, and then drives the main track walking transmission shaft 305 to rotate, and then drives the main track walking active component 306 through the sprocket and chain. Similarly, the sub-track walking transmission shaft four 308 drives the main track walking driven component 312 to rotate.

[0051] The main track travel active component 306 and the main track travel driven component 312 are arranged on the lifting frame 208 and can be raised and lowered as the lifting frame 208 is raised and lowered.

[0052] The lifting and reversing mechanism 200 and the traveling assembly 300 are symmetrically arranged on the left and right sides of the vehicle frame 100. This layout makes the center of gravity of the vehicle more stable when traveling and is not easy to overturn.

[0053] As shown in Figure 7, the electrical component 400 includes a discharge component 401, a control unit 402, a positioning component 403, a lifting and positioning component 404, a reading component 405, a display component 406 and a charging component 407. The discharge component 401, the control unit 402 and the positioning component 403 are all fixed on the vehicle frame 100, and the lifting and positioning component 404, the reading component 405, the display component 406, and the charging component 407 are all fixed on the lifting frame 208.

[0054] The discharge component 401 is used to provide power to the shuttle, the control unit 402 is used to control the operation of the lifting motor 201 and the moving motor 301, the positioning component 403 is used to perform position calibration, the reading component 405 is used to read the position information and display it through the display component 406, and the charging component 407 is used to charge.

[0055] When the shuttle is operating, the control unit 402 issues a dispatch command. The unloaded trolley first moves on the main track, with the cam crank 207 at its lowest position. The trolley's state at this point is shown in Figure 10. Upon reaching the reversal point, the control unit 402 issues a reversal command, causing the lift motor 201 to rotate the cam crank 207, which then pivots to both sides. The trolley's state at this point is shown in Figure 9. The trolley continues along the sub-track. Upon reaching the destination pallet, the control unit 402 issues a lift command, causing the lift motor 201 to rotate the cam crank 207, which then pivots to its highest position. The trolley's state at this point is shown in Figure 8. The lift pallet 209 lifts the cargo. After the trolley has retrieved the cargo and reaches the main track, the control unit 402 issues a lift command, causing the lift motor 201 to rotate the cam crank 207, which then pivots to its lowest position. The trolley's state at this point is shown in Figure 10. The entire vehicle is weighted, lowering its center of gravity. This results in greater cargo stability and smoother operation.

[0056] The worm gear 204 and worm 202 drive the cam crank 207 to rotate for lifting and reversing, making the overall height of the trolley lower, greatly reducing the height of the entire vehicle, saving more space, and improving warehouse utilization. The use of the entire vehicle body to bear the weight not only ensures the stability and safety of the goods, but also is less likely to tilt or malfunction during operation.

[0057] The above description is an explanation of the present invention, not a limitation of the present invention. The scope of the present invention is defined in the claims. Any modifications may be made within the scope of protection of the present invention.

Claims

1. A worm gear linkage cam lifting type ultra-thin four-way shuttle vehicle, characterized in that: include: Frame (100); The lifting reversing mechanism (200) comprises a lifting motor (201), a worm (202), a worm wheel (204), a lifting transmission shaft (206), a cam crank (207), a lifting frame (208) and a lifting support plate (209); the lifting motor (201) drives the worm (202) to rotate, the worm (202) drives the worm wheel (204) to rotate, and the worm wheel (204) drives the cam crank (207) to rotate via the lifting transmission shaft (206); the cam crank (207) is rotatably arranged on the lifting frame (208), the lifting frame (208) is movably arranged in the vehicle frame (100), and the lifting support plate (209) is movably placed on the lifting frame (208); A travel assembly (300) comprises a main track travel assembly and a sub-track travel assembly, and is driven simultaneously by a moving motor (301), wherein the sub-track travel assembly is arranged on the vehicle frame (100), and the main track travel assembly is arranged on the lifting frame (208); When the cam crank (207) rotates downward, it can drive the lifting frame (208) and the lifting support plate (209) to rise, and when the cam crank (207) rotates upward, it can drive the lifting support plate (209) to rise.

2. A worm gear linkage cam lifting type ultra-thin four-way shuttle vehicle as claimed in claim 1, characterized in that: The vehicle also includes an electrical component (400), wherein the electrical component (400) includes a discharge component (401), a control unit (402), a positioning component (403), a lifting and positioning component (404), a reading component (405), a display component (406), and a charging component (407). The discharge component (401), the control unit (402), and the positioning component (403) are arranged on the vehicle frame (100), and the lifting and positioning component (404), the reading component (405), the display component (406), and the charging component (407) are arranged on the lifting frame (208).

3. The worm gear linkage cam lifting type ultra-thin four-way shuttle according to claim 1, characterized in that: The lifting and reversing mechanism (200) and the traveling assembly (300) are symmetrically arranged in the vehicle frame (100).

4. The worm gear linkage cam lifting type ultra-thin four-way shuttle according to claim 1, characterized in that: The sub-track travel component comprises a sub-track travel transmission shaft 1 (302), a sub-track travel transmission shaft 2 (303), a sub-track travel transmission shaft 3 (307), a sub-track travel transmission shaft 4 (308), a sub-track travel active component (310) and a sub-track travel driven component (311); the sub-track travel transmission shaft 1 (302) and the sub-track travel transmission shaft 2 (303) are connected via a coupling (309); the sub-track travel transmission shaft 3 (307) and the sub-track travel transmission shaft 4 (308) are also connected via a coupling (309); the sub-track travel transmission shaft 1 (302) and the sub-track travel transmission shaft 2 (303) are both provided with a sub-track travel active component (310); the sub-track travel transmission shaft 3 (307) and the sub-track travel transmission shaft 4 (308) are both provided with a sub-track travel active component (310); and the sub-track travel transmission shaft 3 (308) and the sub-track travel transmission shaft 4 (311) are both provided with a sub-track travel active component (310). 07) and the sub-track travel drive shaft four (308) are both provided with a sub-track travel driven component (311), a sprocket is provided on the output shaft of the mobile motor (301), a sprocket is provided on the sub-track travel drive shaft two (303), and is connected to the sprocket on the mobile motor (301) through a chain, and sprockets are also provided on the sub-track travel drive shaft one (302), the sub-track travel drive shaft two (303), the sub-track travel drive shaft three (307) and the sub-track travel drive shaft four (308), and the sprockets on the sub-track travel drive shaft one (302) and the sub-track travel drive shaft three (307) are connected through a chain, and the sprockets on the sub-track travel drive shaft two (303) and the sub-track travel drive shaft four (308) are connected through a chain.

5. The worm gear linkage cam lifting type ultra-thin four-way shuttle according to claim 4, characterized in that: The main track travel component comprises a main track travel transmission shaft (305), a main track travel active component (306) and a main track travel driven component (312); two main track travel transmission shafts (305) are provided, and the two main track travel transmission shafts (305) are both rotatably arranged on the vehicle frame (100); sprockets and bevel gears (304) are respectively arranged at two ends of the main track travel transmission shaft (305); a driving bevel gear matching the bevel gear (304) is arranged on the second sub-track travel transmission shaft (303) and the fourth sub-track travel transmission shaft (308); and sprockets corresponding to the sprockets on the main track travel transmission shaft (305) are arranged on the main track travel active component (306) and the main track travel driven component (312), and the sprockets are connected via a chain.

6. The worm gear linkage cam lifting type ultra-thin four-way shuttle according to claim 1, characterized in that: The lifting motor (201) is fixed in the vehicle frame (100), two worm gears (202) are provided, the two worm gears (202) are connected via a lifting coupling (203), the worm gear (202) is fixed in the vehicle frame (100) via a bearing seat, a sprocket is provided on one of the worm gears (202), a lifting sprocket (205) is connected to the output shaft of the lifting motor (201), and the lifting sprocket (205) and the worm gear (202) are connected to each other. The sprockets are connected by a chain, the worm wheel (204) is correspondingly arranged above the worm (202), the worm (202) cooperates with the worm wheel (204), and the rotation of the worm (202) drives the rotation of the worm wheel (204), the worm wheel (204) is fixed on the lifting transmission shaft (206), the lifting transmission shaft (206) is fixed on the frame (100) through a bearing seat, and cam cranks (207) are arranged at both ends of the lifting transmission shaft (206).

7. A worm gear linkage cam lifting type ultra-thin four-way shuttle vehicle as claimed in claim 6, characterized in that: The cam end of the cam crank (207) is placed in a straight groove of the lifting frame (208), and the straight groove is a horizontal groove.

8. The worm gear linkage cam lifting type ultra-thin four-way shuttle according to claim 6, characterized in that: The lifting support plate (209) is movably arranged above the lifting frame (208), and guide shafts are arranged at both ends of the lifting support plate (209). The guide shafts are arranged in the slide grooves of the vehicle frame (100) to limit and guide the lifting support plate (209).

9. The worm gear linkage cam lifting type ultra-thin four-way shuttle according to claim 1, characterized in that: The vehicle frame (100) comprises a bottom plate (105), and a main track side plate 1 (101), a sub-track side plate 1 (102), a sub-track side plate 2 (103), and a main track side plate 2 (104) arranged on the bottom plate 105.

10. The worm gear linkage cam lifting type ultra-thin four-way shuttle according to claim 6, characterized in that: A guide groove is arranged in the vehicle frame (100), the lifting frame (208) is arranged in the guide groove, and wear-resistant graphite brass blocks are arranged at both ends of the lifting frame (208).

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