CN115489418A

CN115489418A - Multifunctional trailer device

Info

Publication number: CN115489418A
Application number: CN202210882156.1A
Authority: CN
Inventors: 孙云旺; 赵海龙; 袁保柱; 陈帅
Original assignee: Shandong Jiuxin Machinery Tool Co ltd
Current assignee: Shandong Jiuxin Machinery Tool Co ltd
Priority date: 2022-07-26
Filing date: 2022-07-26
Publication date: 2022-12-20
Anticipated expiration: 2042-07-26
Also published as: CN115489418B

Abstract

The invention relates to the technical field of trailer tools, in particular to a multifunctional trailer device which comprises a trailer frame, rollers, a rotating shaft, a brake component, a connecting component and a bearing component, wherein the trailer frame is a Contraband type frame, the middle part of the trailer frame is rotatably connected with the rotating shaft, two ends of the rotating shaft respectively penetrate through the front end and the rear end of the trailer frame and are fixedly connected with main rollers, the brake component is arranged on the left side of the rotating shaft in the trailer frame, the connecting component is fixedly connected to the left end face of the brake component, and the bearing component is symmetrically arranged in the front and the rear of the upper end face of the connecting component. The problem that a faulty vehicle cannot brake when the braking capacity is lost or a cab is damaged is solved. The braking assembly is arranged, the dragged automobile drives the sliding rod to move, the brake block can be outwards spread, so that the roller is braked, the spring telescopic rod can absorb impact force generated by braking, the safe braking of a fault automobile is realized, and the safety of a trailer is improved.

Description

Multifunctional trailer device

Technical Field

The invention relates to the technical field of trailer tools, in particular to a multifunctional trailer device.

Background

Trailer equipment generally is used for the interim trailer of trouble vehicle, and when the required trailer equipment breaks down and can't travel, just need to pull trailer equipment one end and required trailer equipment and link to each other, and the other end links to each other with the tractor, drags trouble car through the tractor and removes.

The following problems exist with current trailer equipment: 1. in the tractor dragging fault car driving process, people need to brake the fault car when the tractor brakes in the fault car cab, so that the fault car can be prevented from colliding with the tractor, when the fault car loses braking capacity or the cab is damaged, the trailer can be very dangerous when driving, and the safety of the trailer equipment is not high.

2. The common trailer equipment selects a single-point rotation connection mode in order to ensure the capability of turning of the fault automobile, and the connection mode cannot completely control the running track of the fault automobile when the fault automobile runs, so that the fault automobile can swing left and right when being dragged, the trailer safety is reduced, and the trailer efficiency is also influenced.

Disclosure of Invention

The technical problem to be solved is as follows: the multifunctional trailer device provided by the invention can solve the problems.

The technical scheme is as follows: the utility model provides a multifunctional trailer device, includes trailer frame, axis of rotation, gyro wheel, brake subassembly, coupling assembling and bearing subassembly, the trailer frame is Contraband type frame, and the trailer frame middle part is rotated and is connected with the axis of rotation, and both ends and fixedly connected with gyro wheel around the trailer frame are run through respectively to the axis of rotation both ends, and the inside axis of rotation left side that is located of trailer frame installs the brake subassembly, and brake subassembly left end face fixedly connected with coupling assembling, the bearing subassembly is installed to the symmetry around the coupling assembling up end.

The brake component comprises a sliding rod, a transition plate, a connecting rod, a spring telescopic rod, a supporting rod, a brake block and a limiting shaft, sliding grooves are formed in the front end face and the rear end face inside the trailer frame, the front end face and the rear end face of the trailer frame are located on the right side of the sliding grooves and are provided with brake holes, the brake holes are communicated with the sliding grooves, the sliding rods are jointly connected in the two sliding grooves in a sliding mode, the transition plate is fixedly connected to the left end face of the sliding rod, the left end face of the transition plate is fixedly connected with the connecting rod, the front end face and the rear end face of the connecting rod are symmetrically fixedly connected with the spring telescopic rod, one ends, far away from the connecting rod, of the two spring telescopic rods are fixedly connected to the trailer frame, the supporting rod is movably connected to the front side and the rear side of the right end face of the sliding rod in a symmetrical mode, the one end of the supporting rod is hinged to the brake block, the brake block is located in the brake holes, the middle of the supporting rod is rotatably connected with the limiting shaft, and the upper end and the lower end face of the limiting shaft is fixedly connected to the upper end face and the lower end face of the sliding groove.

As a preferred technical scheme, the connecting assembly comprises a rotating rod, a loading plate, universal wheels, a steering adjusting mechanism, a threaded rod, an adjusting block and adjusting rods, wherein the front end and the rear end of each connecting rod are rotatably connected with the rotating rod, one end of each rotating rod, far away from the corresponding connecting rod, is rotatably connected with the loading plate, the lower end face of each loading plate is rotatably connected with the universal wheel, the steering adjusting mechanism is arranged between opposite faces of the two loading plates, the middle part of the left end face of each connecting rod is rotatably connected with the threaded rod, the adjusting block is in threaded connection with the threaded rod, the front end and the rear end of each adjusting block are hinged with the adjusting rods, and one ends, far away from the adjusting blocks, of the two adjusting rods are respectively hinged to different rotating rods.

As a preferred technical scheme, the steering adjusting mechanism comprises linkage rods, adjusting sleeves, inner sliding rods and fixing bolts, the linkage rods are rotatably connected to opposite surfaces of the two loading plates, the adjusting sleeves are fixedly connected to the front ends of the linkage rods on the rear side, the inner sliding rods are fixedly connected to the rear ends of the linkage rods on the front side, the inner sliding rods are slidably connected to the inside of the adjusting sleeves, and the fixing bolts are in threaded connection between the adjusting sleeves and the inner sliding rods.

According to a preferred technical scheme, the bearing assembly comprises a first fixing plate, a second fixing plate, a linkage mechanism, a pressing column, a bearing spring, a bearing block, a stop plate and a wedge-shaped stop block, the first fixing plate is fixedly connected to a position, close to a symmetrical plane, of the upper end face of the loading plate, the second fixing plate is slidably connected to a position, far away from the symmetrical plane, of the upper end face of the loading plate, the linkage mechanism is mounted on the second fixing plate, a pressing groove is formed in the middle of the upper end face of the loading plate, the pressing column is slidably connected in the pressing groove, the bearing spring is fixedly connected between the lower end face of the pressing column and the inner wall of the pressing groove, the bearing block is fixedly connected to the upper end face of the pressing column, the upper end face of the bearing block is arranged to be a circular arc face, a stop groove is formed in the left side of the pressing groove in the upper end face of the loading plate, the stop plate is rotatably connected in the stop groove, and the wedge-shaped stop block is fixedly connected to the right side of the pressing groove in the upper end face of the loading plate.

According to a preferred technical scheme, the linkage mechanism comprises a screw rod, a driven gear, a linkage shaft and a driving gear, the screw rod is fixedly connected to the end faces of the two second fixing plates, the end faces of the two second fixing plates are opposite to each other, the driven gear is connected to the screw rod in a threaded mode and is rotatably connected to the loading plate through a support, the stop plate is fixedly connected with the linkage shaft, the linkage shaft penetrates through the loading plate and is fixedly connected with the driving gear, and the driving gear is meshed with the driven gear.

As a preferable technical scheme of the invention, the upper end surface of the stop block and the inclined surface of the wedge-shaped stop block are both provided with sawtooth surfaces.

As a preferred technical scheme of the invention, rubber pads are arranged on the opposite end faces of the first fixing plate and the second fixing plate.

As a preferable technical scheme of the present invention, an arc surface matched with a tire is arranged on the upper end surface of the bearing block.

Has the advantages that: 1. when the speed of the dragged automobile is higher than the speed of the traction automobile, the bearing assembly and the connecting assembly connected with the dragged automobile move to drive the sliding rod to move, so that the supporting rod rotates, the brake pad can be outwards spread by matching with the limit of the limiting shaft to brake the roller, and the spring telescopic rod can also absorb the impact force generated by braking, so that the safe braking of a fault automobile is realized, and the safety of a trailer is improved.

2. The supporting assembly supports and limits two front wheels of a fault automobile, wherein the pressing of the tire can drive the stop block to rotatably match the wedge-shaped stop block to limit the tire in the left and right directions, the rotation of the stop block can drive the linkage mechanism to limit the tire in the front and back directions, and then the steering adjusting mechanism can ensure that the two supporting assemblies are kept parallel, so that the fault automobile can be ensured to keep linear movement when the fault automobile does not need to be turned, and the trailer efficiency is improved.

Drawings

The invention is further illustrated by the following examples in conjunction with the drawings.

Fig. 1 is a schematic perspective view of the present invention.

FIG. 2 is a top view of the present invention.

Fig. 3 isbase:Sub>A cross-sectional viewbase:Sub>A-base:Sub>A of fig. 2 according to the present invention.

Fig. 4 is a top cross-sectional view of the present invention.

Fig. 5 is an enlarged view of the invention at point M of fig. 4.

Figure 6 is a schematic view of the load plate and support assembly of the present invention.

In the figure: 1. a trailer frame; 2. a rotating shaft; 3. a roller; 4. a brake assembly; 41. a slide bar; 42. a transition plate; 43. a connecting rod; 44. a spring telescopic rod; 45. a support bar; 46. a brake block; 47. a limiting shaft; 5. A connecting assembly; 51. rotating the rod; 52. a loading plate; 53. a universal wheel; 54. a steering adjustment mechanism; 541. a linkage rod; 542. an adjusting sleeve; 543. an inner slide bar; 544. fixing the bolt; 55. a threaded rod; 56. an adjusting block; 57. adjusting a rod; 6. a holding assembly; 61. a first fixing plate; 62. a second fixing plate; 63. a linkage mechanism; 631. a lead screw; 632. a driven gear; 633. a linkage shaft; 634. a driving gear; 64. pressing the column; 65. Supporting a spring; 66. a bearing block; 67. a stopper plate; 68. a wedge-shaped block.

Detailed Description

Embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.

Referring to fig. 1, a multi-functional trailer device, including trailer frame 1, axis of rotation 2, gyro wheel 3, brake subassembly 4, coupling assembling 5 and bearing subassembly 6, its characterized in that: trailer frame 1 is Contraband type frame, and trailer frame 1 middle part is rotated and is connected with axis of rotation 2, and both ends and fixedly connected with main gyro wheel 3 around trailer frame 1 are run through respectively to 2 both ends of axis of rotation, and the inside 2 left sides that lie in the axis of rotation of trailer frame is installed brake subassembly 4, and brake subassembly 4 left end face fixedly connected with coupling assembling 5, and bearing subassembly 6 is installed to the symmetry around the coupling assembling 5 up end.

Referring to fig. 4 and 5, the brake assembly 4 includes a sliding rod 41, a transition plate 42, a connecting rod 43, a spring telescopic rod 44, a supporting rod 45, a brake block 46 and a limiting shaft 47, sliding grooves are respectively formed on the front and rear end faces inside the trailer frame 1, brake holes are formed on the right sides of the sliding grooves on the front and rear end faces of the trailer frame 1, the brake holes are communicated with the sliding grooves, the sliding rod 41 is jointly and slidably connected in the two sliding grooves, the transition plate 42 is fixedly connected to the left end face of the sliding rod 41, the connecting rod 43 is fixedly connected to the left end face of the transition plate 42, the spring telescopic rods 44 are symmetrically and fixedly connected to the front and rear of the right end face of the connecting rod 43, one ends of the two spring telescopic rods 44, which are far away from the connecting rod 43, are fixedly connected to the trailer frame 1, the supporting rod 45 is movably connected to the front and rear of the right end face of the sliding rod 41, the supporting rod 45 is far away from one end of the sliding rod 41, the brake block 46 is hinged to the brake block 46, the brake block is located in the brake holes, the middle of the supporting rod 45 is rotatably connected to the limiting shaft 47, and the upper and lower ends of the limiting shaft 47 are respectively and fixedly connected to the upper and lower ends of the upper and lower ends of the sliding grooves.

During specific work, in the trailer in-process, when being dragged car speed and being greater than preceding car speed, it can promote bearing subassembly 6 and coupling assembling 5 and move to the right to be dragged the car tire, and then make connecting rod 43 remove, at the removal in-process, connecting rod 43 drives cab apron 42 and slide bar 41 and moves to the right, slide bar 41 further makes bracing piece 45 rotate around spacing axle 47, bracing piece 45 slides to slide bar 41 middle part with the end that slide bar 41 links to each other simultaneously, the spacing axle 47 of cooperation makes brake block 46 strut outwards, can utilize the friction to brake the gyro wheel when brake block 46 contacts gyro wheel 3, the impact force that produces when spring telescopic link 44 is to the brake simultaneously absorbs.

Referring to fig. 1 and 2, coupling assembling 5 includes dwang 51, loading plate 52, universal wheel 53, turns to guiding mechanism 54, threaded rod 55, regulating block 56 and adjusts pole 57, both ends are all rotated around connecting rod 43 and are connected with dwang 51, and the one end that connecting rod 43 was kept away from to dwang 51 is rotated and is connected with loading plate 52, and the terminal surface is rotated and is connected with universal wheel 53 under loading plate 52, installs between two loading plate 52 opposite faces and turns to guiding mechanism 54, connecting rod 43 left end face middle part is rotated and is connected with threaded rod 55, and threaded connection has regulating block 56 on the threaded rod 55, and both ends are all articulated around regulating block 56 to have the regulating rod 57, and the one end that two regulating rods 57 kept away from regulating block 56 articulates respectively on different dwang 51.

During specific work, adjust coupling assembling 5 according to the distance between the required drag car front wheel, artifical rotation threaded rod 55, thereby make regulating block 56 remove to the right side, regulating block 56 drives regulation pole 57 and rotates and struts dwang 51, further drive two loading plates 52 and keep away from each other, use afterwards to turn to adjustment mechanism 54 and make two loading plates 52 parallel, universal wheel 53 makes loading plate 52's removal more smooth, thereby the dragging to the car of different front wheel interwheel distances has been realized, trailer device's use flexibility has been strengthened.

Referring to fig. 1 and 3, the bearing assembly 6 includes a first fixing plate 61, a second fixing plate 62, a linkage mechanism 63, a pressing column 64, a bearing spring 65, a bearing block 66, a stop plate 67 and a wedge-shaped stopper 68, the first fixing plate 61 is fixedly connected to a position of the upper end surface of the loading plate 52 close to the symmetry plane, the second fixing plate 62 is slidably connected to a position of the upper end surface of the loading plate 52 far away from the symmetry plane, the linkage mechanism 63 is installed on the second fixing plate 62, a pressing groove is formed in the middle of the upper end surface of the loading plate 52, the pressing column 64 is slidably connected to the pressing column 64, the bearing spring 65 is fixedly connected between the lower end surface of the pressing column 64 and the inner wall of the pressing groove, the bearing block 66 is fixedly connected to the upper end surface of the pressing column 64, the upper end surface of the bearing block 66 is set to be an arc surface, the stop groove is formed in the left side of the pressing groove, the stop plate 67 is rotatably connected to the stop groove, the upper end surface of the loading plate 52 is fixedly connected to the right side of the pressing groove, the wedge-shaped stopper 68 is fixedly connected to the upper end surface of the loading plate 52, sawtooth surfaces of the first fixing plate 61 and the second fixing plate 62 are respectively provided with rubber pads.

Referring to fig. 6, the linkage 63 includes a screw 631, a driven gear 632, a linkage shaft 633 and a driving gear 634, the screw 631 is fixedly connected to the opposite end surfaces of the two second fixing plates 62, the driven gear 632 is connected to the screw 631 through a thread, the driven gear 632 is rotatably connected to the loading plate 52 through a bracket, the linkage shaft 633 is fixedly connected to the stop plate 67, the linkage shaft 633 penetrates through the loading plate 52 and is fixedly connected to the driving gear 634, and the driving gear 634 is engaged with the driven gear 632.

During specific work, a jack is manually used for jacking the front part of a vehicle to be dragged, then a trailer device is dragged to enable the front wheel of the vehicle to be dragged to be just located above the bearing assembly 6, then the jack is slowly retracted, the front wheel of the vehicle to be dragged moves downwards, a tire can firstly contact with the bearing block 66 and extrude the bearing block 66, the bearing block 66 drives the pressing column 64 to move downwards, the bearing spring 65 contracts, the bearing block 66 moves downwards to abut against the stop plate 67 and enable the stop plate 67 to rotate, in the rotating process, the left end of the stop plate 67 can gradually approach the tire and finally cling to the tire, the right end of the stop plate 67 just returns to the stop groove, the right end of the stop plate 67 is matched with the wedge-shaped stop block 68 on the right side to limit the left and right direction of the tire, the stop plate 67 rotates to drive the linkage shaft 633 and the driven gear 632 to rotate, the driving gear 631 drives the second fixing plate 62 to move towards the direction close to the first fixing plate 61, therefore, the limit of the tire in the front and back directions is achieved, safety of the multidirectional limit trailer can be improved, the stop block 67 and the tooth surface of the linkage shaft 67 and the rubber pad can be used for preventing abrasion between the second fixing plate 62 and the second fixing rubber pad and the abrasion of the tire.

Referring to fig. 2 and 4, the steering adjustment mechanism 54 includes a linkage rod 541, an adjustment sleeve 542, an inner sliding rod 543 and a fixing bolt 544, the linkage rod 541 is rotatably connected to opposite surfaces of the two loading plates 52, the adjustment sleeve 542 is fixedly connected to the front end of the linkage rod 541 located at the rear side, the inner sliding rod 543 is fixedly connected to the rear end of the linkage rod 541 located at the front side, the inner sliding rod 543 is slidably connected to the inside of the adjustment sleeve 542, and the fixing bolt 544 is threadedly connected between the adjustment sleeve 542 and the inner sliding rod 543.

During specific work, in the process of distance adjustment by using the connecting assembly 5, the inner sliding rod 543 slides along the adjusting sleeve 542, the overall length of the inner sliding rod 543 and the adjusting sleeve 542 is lengthened, the linkage rod 541 is fixedly connected with the loading plates 52, the two loading plates 52 are kept parallel, after adjustment is finished, the fixing bolts 544 are screwed, and during normal trailer, the linkage rod 541 and the loading plates 52 are always kept perpendicular, so that left-right swing of a trailer dragged by the vehicle is avoided.

When using this multi-functional trailer device: s1: adjusting connecting component 5 according to the distance between the required front wheel of dragging the car, the threaded rod 55 is rotated manually, thereby make regulating block 56 move to the right, regulating block 56 drives regulating rod 57 and rotates thereby to strut dwang 51, further drive two loading boards 52 and keep away from each other, simultaneously, interior slide bar 543 slides along adjusting sleeve 542, interior slide bar 543 and adjusting sleeve 542 whole length are elongated, because of gangbar 541 and loading board 52 fixed connection, so two loading boards 52 keep parallel, after the regulation finishes, the fixing bolt 544 of screwing.

S2: the front part of a vehicle needing to be dragged is jacked up by manually using a jack, then a trailer device is dragged to enable the front wheel of the vehicle needing to be dragged to be just located above a supporting component 6, then the jack is slowly retracted, the front wheel of the vehicle needing to be dragged moves downwards, a tire can firstly contact and extrude a supporting block 66, the supporting block 66 drives a pressing column 64 to move downwards, a supporting spring 65 contracts, the supporting block 66 moves downwards to abut against a stop plate 67 and enable the stop plate 67 to rotate, in the rotating process, the left end of the stop plate 67 can gradually approach the tire and finally clings to the tire, the right end of the stop plate 67 just returns to a stop groove, the right wedge-shaped stop block 68 is matched to limit the left and right directions of the tire, the stop plate 67 rotates to drive a linkage shaft 633 to rotate, the linkage shaft 633 drives a driving gear 634 and a driven gear 632 to rotate, and further enables a lead screw 631 to drive a second fixing plate 62 to move towards the direction close to a first fixing plate 61, so that the front and back directions of the tire are limited.

S3: in the process of towing, when the speed of the towed vehicle is greater than that of the front vehicle, the towed vehicle tire can push the bearing component 6 and the connecting component 5 to move rightwards, so that the connecting rod 43 moves, in the moving process, the connecting rod 43 drives the transition plate 42 and the sliding rod 41 to move rightwards, the sliding rod 41 further enables the supporting rod 45 to rotate, the matching limiting shaft 47 enables the brake block 46 to be outwards spread, when the brake block 46 contacts the roller 3, the roller can be braked by friction, and meanwhile, the impact force generated during braking is absorbed by the spring telescopic rod 44.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, and such changes and modifications are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a multi-functional trailer device, includes trailer frame (1), axis of rotation (2), gyro wheel (3), brake subassembly (4), coupling assembling (5), bearing subassembly (6), its characterized in that: trailer frame (1) is Contraband type frame, and trailer frame (1) middle part rotates and is connected with axis of rotation (2), and axis of rotation (2) both ends run through trailer frame (1) front and back both ends and fixedly connected with gyro wheel (2) respectively, and brake subassembly (4) are installed on the inside axis of rotation (2) left side that is located of trailer frame (1), brake subassembly (4) left end face fixedly connected with coupling assembling (5), and bearing subassembly (6) are installed to the back symmetry before coupling assembling (5) up end, wherein:

brake subassembly (4) include slide bar (41), cross cab apron (42), connecting rod (43), spring telescopic link (44), bracing piece (45), brake block (46) and spacing axle (47), the sliding tray has all been seted up on just being located the sliding tray right side on the terminal surface around trailer frame (1) is inside, the brake hole has been seted up to the terminal surface around trailer frame (1), the brake hole communicates with each other with the sliding tray, common sliding connection has slide bar (41) in two sliding trays, cab apron (42) have been crossed to the left end face fixedly connected with of slide bar (41), cross left end face fixedly connected with connecting rod (43) of cab apron (42), back symmetry fixedly connected with spring telescopic link (44) around connecting rod (43) is kept away from to connecting rod (43) right-hand member face, the equal fixed connection of one end that connecting rod (43) were kept away from to two spring telescopic link (44) is on trailer frame (1), symmetry swing joint has bracing piece (45) around on slide bar (41) right-hand member's terminal surface, bracing piece (45) keep away from that slide bar (41) one end articulates has brake block (46), brake block (46) are located the brake block (46) and are located in the middle part of bracing piece (45) is rotated and is connected with spacing axle (47), the terminal surface about the both ends are connected respectively at the upper and lower limit axle (47).

2. A multi-purpose trailer arrangement as defined in claim 1 wherein: coupling assembling (5) are including dwang (51), loading plate (52), universal wheel (53), turn to guiding mechanism (54), threaded rod (55), regulating block (56) and adjust pole (57), both ends are all rotated around connecting rod (43) and are connected with dwang (51), and the one end that connecting rod (43) were kept away from in dwang (51) rotates and is connected with loading plate (52), and the terminal surface rotates and is connected with universal wheel (53) under loading plate (52), installs between two loading plate (52) opposite faces and turns to guiding mechanism (54), connecting rod (43) left end face middle part rotates and is connected with threaded rod (55), and threaded rod (55) are gone up threaded connection and have regulating block (56), and both ends all articulate around regulating block (56) have regulation pole (57), and the one end that regulating block (56) were kept away from in two regulation poles (57) articulates respectively on different dwang (51).

3. A multi-purpose trailer arrangement as defined in claim 2 wherein: turn to guiding adjustment mechanism (54) and include gangbar (541), adjusting sleeve (542), interior slide bar (543) and fixing bolt (544), two equal fixedly connected with gangbar (541) on loading plate (52) opposite face, the front end fixedly connected with adjusting sleeve (542) of gangbar (541) that is located the rear side, slide bar (543) in the rear end fixedly connected with of gangbar (541) that is located the front side, interior slide bar (543) sliding connection is in the inside of adjusting sleeve (542), threaded connection has fixing bolt (544) between adjusting sleeve (542) and interior slide bar (543).

4. A multi-purpose trailer arrangement as defined in claim 2 wherein: bearing subassembly (6) include No. one fixed plate (61), no. two fixed plates (62), link gear (63), press post (64), bearing spring (65), bearing piece (66), locking plate (67) and wedge dog (68), load board (52) up end is close to No. one fixed plate (61) of position fixedly connected with of plane of symmetry, the position sliding connection that the plane of symmetry was kept away from to load board (52) up end has No. two fixed plates (62), install link gear (63) on No. two fixed plates (62), load board (52) up end middle part has been seted up and has been pressed the indent, and sliding connection has pressed post (64) to press inslot, presses post (64) down the terminal surface and presses fixedly connected with bearing spring (65) between the inslot wall, presses post (64) up end fixedly connected with bearing piece (66), bearing piece (66) up end sets up to the arc surface, load board (52) up end is located and has been seted up the locking groove (68) on the left side according to the indent, and the rotation is connected with locking plate (67), loading board (52) up end position according to the right side fixedly connected with wedge dog (68).

5. A multi-function cart apparatus according to claim 4, wherein: link gear (63) include lead screw (631), driven gear (632), universal driving shaft (633) and driving gear (634), fixedly connected with lead screw (631) on the terminal surface that two No. two fixed plates (62) carried on the back mutually, threaded connection has driven gear (632) on lead screw (631), and driven gear (632) rotate through the support and connect on loading board (52), fixedly connected with universal driving shaft (633) on stopper board (67), universal driving shaft (633) run through loading board (52) and fixedly connected with driving gear (634), and driving gear (634) mesh with driven gear (632).

6. A multi-function cart apparatus according to claim 4, further comprising: the upper end face of the stop block (67) and the inclined face of the wedge-shaped stop block (68) are both provided with sawtooth surfaces.

7. A multi-function cart apparatus according to claim 4, wherein: rubber pads are arranged on the opposite end faces of the first fixing block (61) and the second fixing block (62).

8. A multi-function cart apparatus according to claim 4, wherein: the upper end surface of the bearing block (66) is provided with an arc surface matched with the tire.