A freight vehicle

Abstract

The present invention belongs to the field of driving, and in particular to a freight vehicle, which includes a guide rail, a running mechanism, a column mechanism, a crossbeam, a trolley frame, and a wire rope, wherein the tops of two height-adjustable column mechanisms are connected by a crossbeam, a trolley frame with a wire rope moves on the crossbeam, and a hook is provided at the end of the wire rope; a running mechanism matching the guide rail is installed at the bottom of each column mechanism. When the column mechanism in the present invention is adjusted in height, the inner column in the column mechanism is extended relative to the outer column, and the reinforcing rod A and the reinforcing rod B on each section plate on the outer column will move toward each other and connect to form a whole as the lower end of the inner column passes upward under the drive of the motor B, so that the part of the outer column without the inner column produces a number of reinforcing ribs corresponding to the section plates one by one and strengthening the strength of the four supporting columns of the outer column along the diagonal direction, ensuring the strength of the column mechanism after it is raised, and ensuring that the column mechanism has sufficient strength after its height is raised without a collapse accident.

Description

Technical Field

[0001] The invention belongs to the field of vehicle driving, and in particular relates to a freight vehicle. Background Art

[0002] In the loading and unloading of large cargoes, a freight vehicle with tracks is often used to load, unload or transfer the cargoes by lifting.

[0003] When loading and unloading goods with a freight truck, due to the high overall height of the truck, the lifting wire rope on the truck is extended longer when lifting the goods. Excessive extended length of the wire rope will lead to reduced tensile strength and breakage during long-term use or large swings due to the inertia of the goods.

[0004] If the height of the crane is designed to be too small, the cargo cannot be hoisted to the required height in special hoisting operations. In this case, in order to ensure that the length of the wire rope is not too long, the columns on both sides of the formation can be designed to be adjustable in height to improve the applicability of the formation. However, the height-adjustable structure of the columns will result in insufficient strength after extension, which is easy to be damaged and cause collapse accidents.

[0005] In addition, the steel wire rope used for lifting goods on traditional cranes is generally installed on a pulley block, which can improve the lifting capacity of the steel wire rope. However, the presence of the pulley block will cause the speed of lifting or lowering the goods by the steel wire rope to slow down, and the lifting efficiency is low.

[0006] The present invention designs a freight transport vehicle to solve the above problems. Summary of the invention

[0007] In order to solve the defects in the prior art, the present invention discloses a freight transport vehicle, which is implemented by adopting the following technical solutions.

[0008] A freight vehicle comprises a guide rail, a traveling mechanism, a column mechanism, a crossbeam, a trolley frame and a steel wire rope, wherein the tops of two height-adjustable column mechanisms are connected by a crossbeam, a trolley frame with a steel wire rope moves on the crossbeam, and a hook is provided at the end of the steel wire rope; a traveling mechanism cooperating with the guide rail is installed at the bottom of each column mechanism.

[0009] The column mechanism includes an outer column, a section plate, a guide sleeve A, a gear C, a reinforcing rod A, a spring A, a guide sleeve B, a gear E, a reinforcing rod B, a spring B, a ring sleeve A, a transmission mechanism, a motor B, an inner column, a screw, and a motor C, wherein an inner column with a top end mounted crossbeam slides vertically inside the outer column installed on the walking mechanism, a high-strength vertical screw connected to the motor C on the walking mechanism is screwed into the threaded hole of the base at the lower end of the inner column; a number of section plates evenly spaced in the vertical direction and nested with the inner column are fixed on the outer column; guide sleeves A and guide sleeves B distributed diagonally along the outer column and coaxial are installed on the upper ends of the section plates, a ring sleeve A connected to the motor B on the walking mechanism is nested and rotatable outside the section plates; the inner thread of the guide sleeve A It is matched with a reinforcement rod A, and a gear C that rotates on the guide sleeve A is axially slidably matched with the reinforcement rod A, and a spring A for axially resetting the reinforcement rod A is matched between the reinforcement rod A and the gear C, and the gear C is connected to the ring sleeve A in transmission; a reinforcement rod B that is threadedly matched with the corresponding reinforcement rod A is axially slidably matched in the guide sleeve B, a gear E that rotates on the guide sleeve B is threadedly matched with the reinforcement rod B, and a spring B for axially resetting the reinforcement rod B is matched between the reinforcement rod B and the gear E, and the gear E is connected to the ring sleeve A in transmission; a transmission mechanism is installed at the lower end of the section disc, which disconnects the transmission connection between the motor B and the corresponding ring sleeve A when it is nested on the inner column, and establishes the transmission connection between the motor B and the corresponding ring sleeve A after the lower end of the inner column passes over the section disc upward.

[0010] As a further improvement of the present technology, the gear C meshes with the gear D on the section disc, and the gear D meshes with the inner gear ring A of the ring sleeve A; the gear E meshes with the gear F on the section disc, and the gear F meshes with the inner gear ring A of the ring sleeve A.

[0011] As a further improvement of the present technology, the transmission ratio of the gear C to the ring gear A is equal to the transmission ratio of the gear E to the ring gear A.

[0012] As a further improvement of the present technology, the spring A is nested on the reinforcing rod A; one end of the spring A is connected to the gear C, and the other end is connected to the ring A on the reinforcing rod A; the spring B is nested on the reinforcing rod B; one end of the spring B is connected to the gear E, and the other end is connected to the rotatably matched ring B on the reinforcing rod B.

[0013] As a further improvement of the present technology, a number of ring sleeves B corresponding to the section discs are fixed on the outer column, and a gear ring C is nested and rotatable on each ring sleeve B; any two adjacent section discs are connected by a vertical rotating shaft A that rotates with it, and a gear J and two gears K are installed on the rotating shaft A. The two gears K are respectively meshed with the corresponding two gear rings C in a one-to-one correspondence, and the gear J cooperates with the transmission mechanism on the upper section disc; a vertical rotating shaft B that is rotatably connected to the output shaft of the motor B is rotatably matched on the lowermost section disc, and gears J and gears K are installed on the rotating shaft B. The gear K on the rotating shaft B is meshed with the lowermost gear ring C, and the gear J on the rotating shaft B cooperates with the transmission mechanism on the corresponding section disc; the transmission mechanism cooperates with the gear G on the corresponding section disc, and the gear G is meshed with the gear ring B on the inner side of the corresponding ring sleeve A.

[0014] As a further improvement of the present technology, the transmission mechanism includes a slider, a gear H, a rack A, a gear I, a rack B, a driving inclined surface, a guide sleeve C, and a spring C, wherein a gear H that cooperates with the corresponding gear G and gear J is installed on the slider that slides on the lower end surface of the section disc; the rack A installed on the slider is meshed with the gear I on the section disc, and the rack B that is meshed with the gear I and moves in the opposite direction to the movement direction of the rack A slides in the two guide sleeves C on the section disc, and a spring C for resetting the rack B is installed in the guide sleeve C; the rack B cooperates with the slats on the inner column, and the end of the rack B has a driving inclined surface that cooperates with the base at the lower end of the inner column.

[0015] As a further improvement of the present technology, the walking mechanism includes a seat, an axle, wheels, and a motor A, wherein two pairs of wheels cooperating with guide rails are installed at the bottom of the seat through two axles, and one axle is drivingly connected to the output shaft of the motor A on the seat.

[0016] As a further improvement of the present technology, a gear B is installed on the output shaft of the motor A, and the gear B is meshed with the gear A on the axle.

[0017] As a further improvement of the present technology, the outer column and the inner column are both truss structures.

[0018] As a further improvement of the present technology, the axial sliding fit between the gear C and the corresponding reinforcement rod A ends when the reinforcement rod A and the corresponding reinforcement rod B are fully threaded together; the threaded engagement between the gear E and the corresponding reinforcement rod B ends when the reinforcement rod B and the corresponding reinforcement rod A are fully threaded together.

[0019] Compared with the traditional crane, the height of the column mechanism on both sides of the present invention is adjustable, so that the present invention is suitable for both normal cargo lifting and special operation lifting requiring a higher height. Whether it is normal lifting or special lifting, since the column mechanism on both sides is retractable, at the beginning of lifting the cargo, the overall height of the crane can be reduced to the minimum and then the steel wire rope can be released to lift the cargo, thereby effectively reducing the amount of lifting steel wire rope released and the overall length of the lifting steel wire rope, thereby increasing the tensile strength of the steel wire rope during the lifting process and reducing the swing amplitude of the steel wire rope during the lifting process.

[0020] Since the column mechanisms on both sides of the present invention are retractable, if the lifting height of the goods needs to be adjusted during the process of lifting and transferring the goods, it is only necessary to adjust the height of the column mechanisms on both sides without adjusting the outward release amount of the wire rope through the pulley block. The adjustment of the height of the column mechanism is faster than the height adjustment of the goods by the wire rope on the pulley block, thereby improving the efficiency of height adjustment of the goods during the lifting and transfer process.

[0021] When the column mechanism in the present invention is adjusted in height, the inner column in the column mechanism is extended relative to the outer column, and the reinforcing rods A and B on each section disk on the outer column will move toward each other and connect to form a whole as the lower end of the inner column moves upward under the drive of the motor B, so that the part of the outer column without the inner column produces a number of reinforcing ribs that correspond to the section disks one by one and reinforce the strength of the four supporting columns of the outer column along the diagonal direction, thereby ensuring the strength of the column mechanism after it is raised, and ensuring that the column mechanism has sufficient strength after its height is increased and will not collapse. At the same time, the formed several reinforcing ribs form an axial surrounding state for the screw rod after the inner column moves upward, thereby effectively supporting and reinforcing the screw rod, and preventing the screw rod from bending and deforming under heavy pressure. The present invention has a simple structure and a good use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is an overall schematic diagram of the present invention.

[0023] Figure 2 It is a schematic diagram of the coordination between the column mechanism and the walking mechanism and their cross-section.

[0024] Figure 3 It is a schematic diagram of the walking mechanism.

[0025] Figure 4 It is a cross-sectional schematic diagram of the coordination of the reinforcing rod A and the reinforcing rod B on the section plate that is not nested with the inner column.

[0026] Figure 5 It is a cross-sectional schematic diagram of the coordination between the reinforcing rod A and the reinforcing rod B on the section plate nested with the inner column.

[0027] Figure 6It is a cross-sectional schematic diagram of the transmission connection between the structure on the segment disk and the motor B and the structural transmission connection between two adjacent segment disks.

[0028] Figure 7 It is a partial schematic diagram of the transmission mechanism and the corresponding gear G and shaft A.

[0029] Figure 8 It is a cross-sectional schematic diagram of the transmission mechanism and the corresponding gear G and shaft A.

[0030] Fig. 9 It is a perspective schematic diagram of the cooperation between the screw rod and the reinforcing rod A and the reinforcing rod B on each section disc.

[0031] Fig.10 It is a schematic diagram of the outer column.

[0032] Fig.11 It is a schematic diagram of the inner column.

[0033] Names of the symbols in the figure: 1. Guide rail; 2. Travel mechanism; 3. Seat; 4. Axle; 5. Wheel; 6. Gear A; 7. Gear B; 8. Motor A; 9. Column mechanism; 10. Outer column; 11. Support column; 12. Sectional plate; 13. Guide sleeve A; 14. Gear C; 15. Reinforcement rod A; 16. Ring A; 17. Spring A; 18. Gear D; 19. Guide sleeve B; 20. Gear E; 21. Reinforcement rod B; 22. Ring B; 23. Spring B; 24. Gear F; 25. Ring gear A; 26. Ring sleeve A; 27. Gear ring B; 28. Gear G; 29. ​​Transmission mechanism; 30. Slider; 31. Gear H; 32. Rack A; 33. Gear I; 34. Rack B; 35. Driving ramp; 36. Guide sleeve C; 37. Spring C; 38. Gear J; 39. Rotating shaft A; 40. Gear K; 41. Gear ring C; 42. Ring sleeve B; 44. Rotating shaft B; 46. Motor B; 47. Inner column; 48. Slats; 49. Base; 50. Threaded hole; 51. Screw; 52. Motor C; 53. Crossbeam; 54. Trolley frame; 55. Wire rope. DETAILED DESCRIPTION

[0034] The accompanying drawings are schematic diagrams of the present invention, which are provided to facilitate understanding of the operating principle of the structure. The specific product structure and proportional dimensions can be determined according to the use environment combined with conventional technology.

[0035] like Figure 1 As shown, it includes a guide rail 1, a walking mechanism 2, a column mechanism 9, a crossbeam 53, a trolley frame 54, and a wire rope 55. Figure 1 As shown, the tops of two height-adjustable column mechanisms 9 are connected by a crossbeam 53, on which a small carriage 54 with a steel wire rope 55 moves, and at the end of the steel wire rope 55 there is a hook; a walking mechanism 2 that cooperates with the guide rail 1 is installed at the bottom of each column mechanism 9.

[0036] like Figure 2 As shown, the column mechanism 9 includes an outer column 10, a section plate 12, a guide sleeve A13, a gear C14, a reinforcing rod A15, a spring A17, a guide sleeve B19, a gear E20, a reinforcing rod B21, a spring B23, a ring sleeve A26, a transmission mechanism 29, a motor B46, an inner column 47, a screw 51, and a motor C52, wherein as Figure 1 , 2 As shown in FIG. 11 , an inner column 47 with a top mounted crossbeam 53 is vertically slid in the outer column 10 installed in the walking mechanism 2, and a high-strength vertical screw 51 connected to the motor C52 on the walking mechanism 2 is screwed into the threaded hole 50 of the base 49 at the lower end of the inner column 47; Figure 2 , 10 As shown, a plurality of segment plates 12 are fixed on the outer column 10 and are evenly spaced in the vertical direction and nested with the inner column 47; Figure 4 , 5 As shown in , 6, the upper end of the section disc 12 is installed with a guide sleeve A13 and a guide sleeve B19 which are distributed diagonally along the outer column 10 and are coaxial, and the section disc 12 is nested and rotated with a ring sleeve A26 which is transmission-connected to the motor B46 on the walking mechanism 2; the guide sleeve A13 is internally threaded with a reinforcing rod A15, and a gear C14 which is rotationally matched on the guide sleeve A13 is axially slidingly matched with the reinforcing rod A15, and a spring A17 for axially resetting the reinforcing rod A15 is matched between the reinforcing rod A15 and the gear C14, and the gear C14 is transmission-connected with the ring sleeve A26; a reinforcing rod B21 which is threadedly matched with the corresponding reinforcing rod A15 is axially slidingly matched in the guide sleeve B19, and a gear E20 which is rotationally matched on the guide sleeve B19 is threadedly matched with the reinforcing rod B21, and a spring B23 for axially resetting the reinforcing rod B21 is matched between the reinforcing rod B21 and the gear E20, and the gear E20 is transmission-connected with the ring sleeve A26; Figure 6 , 7 As shown in Figures 8 and 9, a transmission mechanism 29 is installed at the lower end of the node disk 12 for disconnecting the transmission connection between the motor B46 and the corresponding ring sleeve A26 when the node disk 12 is nested on the inner column 47, and for establishing the transmission connection between the motor B46 and the corresponding ring sleeve A26 after the lower end of the inner column 47 passes over the node disk 12 upward.

[0037] like Figure 4 , 5 As shown, the gear C14 meshes with the gear D18 on the section disc 12, and the gear D18 meshes with the inner ring gear A25 of the annular sleeve A26; the gear E20 meshes with the gear F24 on the section disc 12, and the gear F24 meshes with the inner ring gear A25 of the annular sleeve A26.

[0038] like Figure 4 , 5 As shown, the transmission ratio of the gear C14 to the ring gear A25 is equal to the transmission ratio of the gear E20 to the ring gear A25.

[0039] like Figure 4 , 5 As shown, the spring A17 is nested on the reinforcing rod A15; one end of the spring A17 is connected to the gear C14, and the other end is connected to the ring A16 on the reinforcing rod A15; the spring B23 is nested on the reinforcing rod B21; one end of the spring B23 is connected to the gear E20, and the other end is connected to the rotatably matched ring B22 on the reinforcing rod B21.

[0040] like Figure 6 , 7 As shown in Figures 8 and 9, a plurality of rings B42 corresponding to the section discs 12 are fixed on the outer column 10, and a gear ring C41 is nested and rotatable on each ring B42; any two adjacent section discs 12 are connected by a vertical shaft A39 that rotates with them, and a gear J38 and two gears K40 are installed on the shaft A39, and the two gears K40 are respectively meshed with the corresponding two gear rings C41, and the gear J38 cooperates with the transmission mechanism 29 on the upper section disc 12; A vertical shaft B44 is rotatably matched on the lower end section disc 12 and is transmission-connected to the output shaft of the motor B46. Gears J38 and gear K40 are installed on the shaft B44. The gear K40 on the shaft B44 meshes with the lowermost gear ring C41. The gear J38 on the shaft B44 cooperates with the transmission mechanism 29 on the corresponding section disc 12; the transmission mechanism 29 cooperates with the gear G28 on the corresponding section disc 12, and the gear G28 meshes with the gear ring B27 on the inner side of the corresponding ring sleeve A26.

[0041] like Figure 7 , 8 As shown, the transmission mechanism 29 includes a slider 30, a gear H31, a rack A32, a gear I33, a rack B34, a driving inclined surface 35, a guide sleeve C36, and a spring C37, wherein the slider 30 sliding on the lower end surface of the section disc 12 is equipped with a gear H31 that cooperates with the corresponding gear G28 and the gear J38; the rack A32 installed on the slider 30 is meshed with the gear I33 on the section disc 12, and the rack B34 meshed with the gear I33 and moving in the opposite direction to the rack A32 slides in the two guide sleeves C36 on the section disc 12, and the guide sleeve C36 is equipped with a spring C37 for resetting the rack B34; the rack B34 cooperates with the slat 48 on the inner column 47, and the end of the rack B34 has a driving inclined surface 35 that cooperates with the base 49 at the lower end of the inner column 47.

[0042] like Figure 3 As shown, the walking mechanism 2 includes a seat 3, a wheel axle 4, wheels 5, and a motor A8, wherein two pairs of wheels 5 matching the guide rails 1 are installed at the bottom of the seat 3 through two wheel axles 4, and one wheel axle 4 is drivingly connected to the output shaft of the motor A8 on the seat 3.

[0043] like Figure 3 As shown, a gear B7 is installed on the output shaft of the motor A8, and the gear B7 is meshed with the gear A6 on the axle 4.

[0044] like Fig.10 , 11 As shown, the outer column 10 and the inner column 47 are both truss structures.

[0045] like Figure 4 As shown, the axial sliding fit between the gear C14 and the corresponding reinforcing rod A15 ends when the reinforcing rod A15 and the corresponding reinforcing rod B21 are fully threaded together; the threaded engagement between the gear E20 and the corresponding reinforcing rod B21 ends when the reinforcing rod B21 and the corresponding reinforcing rod A15 are fully threaded together.

[0046] The working process of the present invention is as follows: in the initial state, the height of the crossbeam 53 reaches the lowest limit, the driving inclined surface 35 end of the rack B34 in each transmission mechanism 29 abuts against the corresponding slat 48 on the inner column 47, the spring C37 in the transmission mechanism 29 is in the ultimate compression state, and the gear H31 in the transmission mechanism 29 is not meshed with the corresponding gear J38 and gear G28. The transmission connection between the ring A26 on each section plate 12 and the motor B46 is in a disconnected state. Figure 5 As shown, the reinforcing rod A15 on each section disc 12 is disengaged from the corresponding reinforcing rod B21 and avoids the inner column 47, the spring A17 and the spring B23 are both in an extreme tensile state, the reinforcing rod A15 and the corresponding gear C14 are in an axial sliding fit state, and the reinforcing rod B21 and the corresponding gear E20 are in a threaded engagement state.

[0047] When the present invention is needed to be used for cargo hoisting and transfer, the overall height of the traveling vehicle is first kept to the minimum and then the steel wire rope 55 is released to hoist the cargo. After the cargo is hooked on the steel wire rope 55, the motors C52 in the two traveling mechanisms 2 are started, and the two motors C52 respectively drive the two inner columns 47 to move upward synchronously through the corresponding screws 51 to realize the continued lifting of the cargo, thereby effectively reducing the amount of the hoisting steel wire rope 55 released, and reducing the overall length of the hoisting steel wire rope 55, thereby improving the tensile strength of the steel wire rope 55 during the hoisting of the cargo and reducing the swing amplitude of the steel wire rope 55 during the hoisting of the cargo.

[0048] When the inner column 47 rises relative to the outer column 10, the motors B46 in the two walking mechanisms 2 are started. The two motors B46 drive the gears K40 and J38 on the rotating shaft B44 to rotate synchronously through the corresponding rotating shaft B44. The gear K40 on the rotating shaft B44 drives the lowermost ring gear C41 to rotate. The lowermost ring gear C41 drives the lowermost rotating shaft A39 to rotate through the gear K40 at the lower end of the upper rotating shaft A39. The lowermost rotating shaft A39 then drives the upper ring gear C41 to rotate through the gear K40 at its upper end. In this way, all the ring gears C41 rotate synchronously at the same time, and all the rotating shafts A39 rotate synchronously at the same time. Since the gears H31 on all the transmission mechanisms 29 are not meshed with the gears G28 on the corresponding section discs 12, the ring sleeve A26 on each section disc 12 does not rotate, and the reinforcing rods A15 and B21 on each section disc 12 are in a state of avoiding the inner column 47 and do not move.

[0049] When the base 49 at the lower end of the inner column 47 is disengaged from the lowermost segment disk 12, the rack B34 in the transmission mechanism 29 on the lowermost segment disk 12 is disengaged from the strip 48 on the inner column 47. The rack B34 slides a certain distance in the direction of the inner column 10 under the action of the corresponding spring C37. The rack B34 drives the gear H31 through the gear I33, the rack A32, and the slider 30 to mesh with the gear J38 on the rotating shaft B44 and the gear G28 on the lowermost segment disk 12. The gear J38 on the rotating shaft B44 drives the gear G28 to rotate through the gear H31 in the corresponding transmission mechanism 29. The gear G28 drives the corresponding ring A26 to rotate through the corresponding gear ring B27. The ring A26 drives the corresponding gear D18 and gear F24 to rotate through the corresponding gear ring A25. The gear D18 drives the gear C14 to rotate relative to the guide sleeve A13. The gear C14 drives the reinforcing rod A15 axially slidingly matched with it to rotate synchronously and move axially toward the reinforcing rod B21. Gear F24 drives wheel E to rotate relative to guide sleeve B19, and gear E20 drives reinforcing rod B21 threadedly engaged with it to move axially toward reinforcing rod A15. Spring A17 and spring B23 change from a tension state to a compression state.

[0050] When the reinforcing rod A15 meets the reinforcing rod B21, the rotating and advancing reinforcing rod A15 begins to be screwed into the end thread groove of the axially advancing reinforcing rod B21, and the connection between the reinforcing rod A15 and the reinforcing rod B21 begins.

[0051] When the reinforcing rod A15 and the reinforcing rod B21 are screwed to the limit, the gear C14 and the reinforcing rod A15 just release the axial sliding fit, the reinforcing rod A15 no longer rotates and the gear C14 idles, the gear and the reinforcing rod B21 just release the threaded screwing, the reinforcing rod B21 no longer moves axially and the gear E20 idles.

[0052] The connected reinforcing rods A15 and B21 form support and reinforcement for the corresponding two diagonally distributed support columns 11 on the outer column 10 along the diagonal direction of the outer column 10, so that the portion of the outer column 10 that loses the support of the inner column 47 due to the rising of the inner column 47 is reinforced and supported by the reinforcing ribs formed by the reinforcing rods A15 and B21 connected along the diagonal direction of the outer column 10, thereby ensuring the strength of the outer column 10 during the rising process of the inner column 47 and avoiding the collapse of the vehicle's column mechanism 9 due to insufficient strength during its rising process.

[0053] As the inner column 47 rises, the reinforcing rods A15 and B21 on the segment discs 12 are connected in sequence after passing upwards over the base 49 at the lower end of the inner column 47. The reinforcing ribs formed by the connection of the reinforcing rods A15 and B21 on each segment disc 12 and the reinforcing ribs formed by the connection of the reinforcing rods A15 and B21 on the adjacent segment discs 12 are in a mutually perpendicular state when viewed from a top view. Fig. 9 As shown, in a top view, the reinforcing ribs formed by connecting the reinforcing rods A15 and B21 on each section disc 12 surround the screw rod 51 that drives the inner column 47 to move, thereby playing a role in strengthening and protecting the screw rod 51 to a certain extent.

[0054] When it is necessary to lower and reset the column mechanism 9 in the present invention after the lifting of the goods is completed, the motor B46 is first started in reverse. The motor B46 will drive the ring sleeve A26 on all the section plates 12 to rotate in the opposite direction through a series of transmissions. The ring sleeve A26 drives the gear D18 and the gear F24 on each section plate 12 to rotate through the ring gear A25. The gear D18 drives the gear C14 to rotate in the opposite direction, and the gear F24 drives the gear E20 to rotate in the opposite direction.

[0055] During the reverse rotation of gear D18 and gear E20, since the pitch of the thread between reinforcing rod A15 and reinforcing rod B21 or guide sleeve A13 and the pitch of the thread between reinforcing rod B21 and gear E20 are both relatively large, reinforcing rod A15 will rotate in the reverse direction relative to reinforcing rod B21 and make a small axial movement under the reset action of spring A17. At the same time, reinforcing rod B21 will be pushed in the reverse direction, so that reinforcing rod A15 and gear C14 will establish an axial sliding fit relationship again, and reinforcing rod B21 will begin to mesh with gear E20 under the reset action of spring B23.

[0056] Gear E20 drives the reinforcing rod B21 which is re-engaged with it to axially reset, and gear C14 drives the reinforcing rod A15 which is restored to the axial sliding fit relationship with it to axially reset under the action of guide sleeve A13, and finally the reinforcing rod A15 is separated and reset from the reinforcing rod B21 to avoid the inner column 47.

[0057] Then, the motor C52 is started, and the motor C52 drives the inner column 47 to descend and finally reset through the screw rod 51.

[0058] During the descent of the inner column 47, when the base 49 at the bottom of the inner column 47 meets the driving inclined surface 35 of the rack B34 on the segment disk 12, the rack B34 on the segment disk 12 quickly slides back and resets, and the rack B34 drives the gear H31 in the transmission mechanism 29 to disengage from the corresponding gear G28 and gear J38 through a series of transmissions, thereby disconnecting the transmission connection between the ring sleeve A26 on the segment disk 12 and the motor B46.

[0059] The column mechanism 9 in the present invention cannot be retracted during the process of hoisting cargo, because when the column mechanism 9 is retracted, the reinforcing rod A15 on each section plate 12 needs to be disconnected from the reinforcing rod B21, which reduces the strength of the entire column mechanism 9. If it is lowered during the process of hoisting cargo, it is very likely that the column mechanism 9 will collapse due to insufficient strength.

[0060] In summary, the beneficial effects of the present invention are as follows: the height of the column mechanisms 9 on both sides of the present invention is adjustable, so that the present invention is suitable for both normal cargo lifting and special operation lifting requiring a higher height. Whether it is normal lifting or special lifting, since the column mechanisms 9 on both sides are retractable, at the beginning of lifting the cargo, the overall height of the vehicle can be reduced to the minimum and then the steel wire rope 55 can be released to lift the cargo, thereby effectively reducing the amount of the lifting steel wire rope 55 released, and reducing the overall length of the lifting steel wire rope 55, thereby increasing the tensile strength of the steel wire rope 55 during the lifting of the cargo and reducing the swing amplitude of the steel wire rope 55 during the lifting of the cargo.

[0061] Since the column mechanisms 9 on both sides of the present invention are retractable, if it is necessary to adjust the lifting height of the goods during the lifting and transfer of goods, it is only necessary to adjust the height of the column mechanisms 9 on both sides without adjusting the outward release amount of the wire rope 55 through the pulley block. The height adjustment of the column mechanism 9 is faster than the height adjustment of the goods by the wire rope 55 on the pulley block, thereby improving the height adjustment efficiency of the goods during the lifting and transfer process.

[0062] When the column mechanism 9 in the present invention is raised, the inner column 47 in the column mechanism 9 is extended relative to the outer column 10, and the reinforcing rods A15 and B21 on each section plate 12 on the outer column 10 will move toward each other and connect to form a whole as the lower end of the inner column 47 passes upward under the drive of the motor B46, so that the part of the outer column 10 without the inner column 47 produces a number of reinforcing ribs corresponding to the section plates 12 one by one and strengthening the four supporting columns 11 of the outer column 10 in the diagonal direction, ensuring the strength of the column mechanism 9 after it is raised, and ensuring that the column mechanism 9 has sufficient strength after its height is increased without collapse accidents. At the same time, the formed several reinforcing ribs form an axial surrounding state for the screw rod 51 after the inner column 47 moves upward, thereby effectively supporting and reinforcing the screw rod 51, and preventing the screw rod 51 from bending and deforming under heavy pressure.

Claims

1. A freight transport vehicle, characterized in that: It includes a guide rail, a running mechanism, a column mechanism, a crossbeam, a trolley frame, and a steel wire rope. The tops of two height-adjustable column mechanisms are connected by a crossbeam, and a trolley frame with a steel wire rope moves on the crossbeam. The end of the steel wire rope has a hook. A running mechanism that matches the guide rail is installed at the bottom of each column mechanism. The column mechanism includes an outer column, a section plate, a guide sleeve A, a gear C, a reinforcing rod A, a spring A, a guide sleeve B, a gear E, a reinforcing rod B, a spring B, a ring sleeve A, a transmission mechanism, a motor B, an inner column, a screw, and a motor C, wherein an inner column with a top end mounted crossbeam slides vertically inside the outer column installed on the walking mechanism, a high-strength vertical screw connected to the motor C on the walking mechanism is screwed into the threaded hole of the base at the lower end of the inner column; a number of section plates evenly spaced in the vertical direction and nested with the inner column are fixed on the outer column; guide sleeves A and guide sleeves B distributed diagonally along the outer column and coaxial are installed on the upper ends of the section plates, a ring sleeve A connected to the motor B on the walking mechanism is nested and rotatable outside the section plates; the inner thread of the guide sleeve A It is matched with a reinforcement rod A, and a gear C that rotates on the guide sleeve A is axially slidably matched with the reinforcement rod A, and a spring A for axially resetting the reinforcement rod A is matched between the reinforcement rod A and the gear C, and the gear C is connected to the ring sleeve A in transmission; a reinforcement rod B that is threadedly matched with the corresponding reinforcement rod A is axially slidably matched in the guide sleeve B, a gear E that rotates on the guide sleeve B is threadedly matched with the reinforcement rod B, and a spring B for axially resetting the reinforcement rod B is matched between the reinforcement rod B and the gear E, and the gear E is connected to the ring sleeve A in transmission; a transmission mechanism is installed at the lower end of the section disc, which disconnects the transmission connection between the motor B and the corresponding ring sleeve A when it is nested on the inner column, and establishes the transmission connection between the motor B and the corresponding ring sleeve A after the lower end of the inner column passes over the section disc upward.

2. A freight transport vehicle according to claim 1, characterized in that: The gear C is meshed with the gear D on the section plate, and the gear D is meshed with the inner gear ring A of the ring sleeve A; the gear E is meshed with the gear F on the section plate, and the gear F is meshed with the inner gear ring A of the ring sleeve A.

3. A freight transport vehicle according to claim 2, characterized in that: The transmission ratio of the gear C to the ring gear A is equal to the transmission ratio of the gear E to the ring gear A.

4. A freight transport vehicle according to claim 1, characterized in that: The spring A is nested on the reinforcing rod A; one end of the spring A is connected to the gear C, and the other end is connected to the ring A on the reinforcing rod A; the spring B is nested on the reinforcing rod B; one end of the spring B is connected to the gear E, and the other end is connected to the rotatably matched ring B on the reinforcing rod B.

5. A freight transport vehicle according to claim 1, characterized in that: A number of ring sleeves B corresponding to the section discs are fixed on the outer column, and a gear ring C is nested and rotatable on each ring sleeve B; any two adjacent section discs are connected by a vertical rotating shaft A that rotates with it, and a gear J and two gears K are installed on the rotating shaft A. The two gears K are respectively meshed with the two corresponding gear rings C in a one-to-one correspondence, and the gear J cooperates with the transmission mechanism on the upper section disc; a vertical rotating shaft B that is rotatably connected to the output shaft of the motor B is rotatably matched on the lowermost section disc, and gears J and gears K are installed on the rotating shaft B. The gear K on the rotating shaft B is meshed with the lowermost gear ring C, and the gear J on the rotating shaft B is matched with the transmission mechanism on the corresponding section disc; the transmission mechanism cooperates with the gear G on the corresponding section disc, and the gear G is meshed with the gear ring B on the inner side of the corresponding ring sleeve A.

6. A freight transport vehicle according to claim 1, characterized in that: The transmission mechanism includes a slider, a gear H, a rack A, a gear I, a rack B, a driving inclined surface, a guide sleeve C, and a spring C, wherein a gear H that cooperates with the corresponding gear G and gear J is installed on the slider that slides on the lower end surface of the section disc; the rack A installed on the slider is meshed with the gear I on the section disc, and the rack B that is meshed with the gear I and moves in the opposite direction to the movement direction of the rack A slides in the two guide sleeves C on the section disc, and a spring C for resetting the rack B is installed in the guide sleeve C; the rack B cooperates with the slats on the inner column, and the end of the rack B has a driving inclined surface that cooperates with the base at the lower end of the inner column.

7. A freight transport vehicle according to claim 1, characterized in that: The walking mechanism includes a seat, axles, wheels, and a motor A, wherein two pairs of wheels matching the guide rails are installed at the bottom of the seat through two axles, and one axle is drivingly connected to the output shaft of the motor A on the seat.

8. A freight transport vehicle according to claim 7, characterized in that: The output shaft of the motor A is provided with a gear B, which meshes with the gear A on the wheel shaft.

9. A freight transport vehicle according to claim 1, characterized in that: The outer column and the inner column are both truss structures.

10. A freight transport vehicle according to claim 1, characterized in that: The axial sliding fit between the gear C and the corresponding reinforcing rod A ends when the reinforcing rod A and the corresponding reinforcing rod B are fully threaded together; the threaded engagement between the gear E and the corresponding reinforcing rod B ends when the reinforcing rod B and the corresponding reinforcing rod A are fully threaded together.

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