Forking type side-mounted wrecker

Abstract

The invention discloses a fork lifting type side-mounted wrecker, and relates to the technical field of road wreckers, the fork lifting type side-mounted wrecker comprises an auxiliary frame assembly fixed on an automobile girder, two shear type lifters are arranged below the auxiliary frame assembly in parallel in the transverse direction, and a supporting leg assembly is arranged at each of the two ends of each shear type lifter in a spanning manner; the supporting foot assemblies are connected with the auxiliary frame assembly through the supporting leg assemblies, and the supporting foot assemblies are connected with the corresponding shear type lifters through the telescopic sliding rails and used for driving the shear type lifters to transversely stretch out and reset from the lower portion of the auxiliary frame assembly. A symmetrical traction telescopic mechanism is arranged on the auxiliary frame assembly, two supporting plates are arranged on the symmetrical traction telescopic mechanism in parallel in the transverse direction, and the symmetrical traction telescopic mechanism is used for driving the supporting plates to move to the shear type lifting machine and reset. The side-mounted road wrecker solves the problems that a traditional side-mounted road wrecker occupies a large concentrated space above a chassis and is high in overall height and low in universality.

Description

Technical Field

[0001] The invention relates to the technical field of road tow trucks, in particular to a fork-lift side-mounted tow truck. Background Art

[0002] At present, the existing side-mounted road tow trucks mainly realize the lateral movement and vertical lifting of the faulty vehicle through the horizontal mechanism and the vertical mechanism. The horizontal mechanism is mostly arranged above the vehicle chassis, and the vertical mechanism is arranged on the horizontal mechanism. For a side-mounted road tow truck with this structure, regardless of whether it carries a faulty vehicle, its vertical mechanism is always biased to the left or right side of the tow truck. The horizontal mechanism and the vertical mechanism are arranged relatively concentrated, so they occupy a large concentrated space above the chassis, resulting in a lateral shift in the center of gravity of the whole vehicle; in addition, the side-mounted road tow truck with this structure cannot realize the left and right bidirectional side loading function.

[0003] The retractable fork arm proposed in the Chinese patent document "A side-mounted tow truck" (patent application number 202311529810.1) can only be lowered when the slide frame is translated to the outermost side due to space limitations. This requires that a certain distance must be reserved between the rescue vehicle and the faulty vehicle in order to perform the side-mounting action.

[0004] The vertical mechanism proposed in the Chinese patent document "A Side-mounted Road Tow Truck" (patent application number 201810184239.7) is arranged on a horizontal trolley, and the fork teeth are fixed to the vertical trolley through clamp arms. The side-mounted tow truck with this structure is similar to the side-mounted tow truck with application number 202311529810.1. Their common characteristics are: they occupy a large concentrated space above the chassis, the overall height above the chassis is relatively high, and they cannot achieve left and right bidirectional side loading, so their versatility is relatively low. Summary of the invention

[0005] In view of the defects existing in the prior art, the purpose of the present invention is to provide a fork-lift side-mounted tow truck, which solves the problems that the traditional side-mounted road tow truck occupies a large concentrated space above the chassis, has a high overall height and low versatility.

[0006] To achieve the above purpose, the technical solution adopted by the present invention is: a fork-lift side-mounted tow truck, including a subframe assembly fixed on a vehicle beam, two scissor lifts are arranged in parallel along the horizontal direction below the subframe assembly, and a support leg assembly is arranged at both ends of each scissor lift, the support leg assembly is connected to the subframe assembly through the leg assembly, and the support leg assembly is connected to the corresponding scissor lift through a telescopic slide rail, which is used to drive the scissor lift to extend horizontally from the bottom of the subframe assembly and reset; a symmetrical traction and telescopic mechanism is arranged on the subframe assembly, two support plates are arranged in parallel along the horizontal direction on the symmetrical traction and telescopic mechanism, and the symmetrical traction and telescopic mechanism is used to drive the support plate to move to the scissor lift and reset.

[0007] On the basis of the above technical solution, the symmetrical traction telescopic mechanism includes a traction cylinder, two transverse guide rail mechanisms and two traction trolleys; the two transverse guide rail mechanisms are arranged parallel and relatively on the sub-frame assembly; the two traction trolleys are respectively slidably arranged on the corresponding transverse guide rail mechanisms; the traction cylinder is respectively connected to the two traction trolleys through a transmission mechanism to drive the traction trolleys to move; the two drag plates are respectively arranged on the corresponding transverse guide rail mechanisms and connected to the traction trolleys, and can slide in and out of the transverse guide rail mechanisms driven by the traction trolley.

[0008] On the basis of the above technical solution, the cross-section of the transverse guide rail mechanism is a U-shaped structure with an opening facing upward, and the bottom plate of the transverse guide rail mechanism is provided with a linear guide rail compatible with the traction trolley; steering shafts are respectively provided at both ends of the transverse guide rail mechanism; the cross-section of the carriage is a U-shaped structure with an opening facing downward, and the top wall of the carriage is provided with a connecting hole compatible with the traction trolley; the two side plates of the transverse guide rail mechanism are respectively provided with a plurality of first guide rollers compatible with the inner top wall of the carriage, and the outer sides of the two side plates of the transverse guide rail mechanism are respectively provided with a plurality of first friction blocks compatible with the inner side walls of the carriage.

[0009] On the basis of the above technical solution, the traction trolley includes a trolley body, and the first running wheel and the second running wheel are arranged at both ends of the bottom of the trolley body, and the height of the first running wheel is higher than the second running wheel; the top of the trolley body is connected to the traction plate through a connecting column, and the traction plate is provided with a towing pin for connecting the towing plate; the bottom of the traction plate is provided with an upper clamping block, and the top of the trolley body is provided with a lower clamping block.

[0010] On the basis of the above technical solution, the transmission mechanism includes two symmetrically arranged first steel wire ropes, and the two first steel wire ropes are respectively connected to the corresponding traction trolleys through pulley blocks; the pulley block includes a moving plate, a first fixed plate, a second fixed plate and two third fixed plates;

[0011] The first fixing plate and the second fixing plate are arranged on the sub-frame assembly in a transverse direction opposite to each other; the first fixing plate is provided with a first locking plate for fixing the ends of the two first steel wire ropes, and the second pulley, the third pulley and the fourth pulley are respectively arranged on both sides of the first locking plate; the second fixing plate is provided with a second locking plate for fixing the other ends of the two first steel wire ropes, and the ninth pulley, the tenth pulley and the twelfth pulley are respectively arranged on both sides of the second locking plate;

[0012] The movable plate is transversely slidably arranged between the first fixed plate and the second fixed plate, and is connected to the piston rod of the traction cylinder; the first pulley and the eleventh pulley are arranged on both sides of the top surface of the movable plate;

[0013] Two third fixing plates are longitudinally arranged opposite to each other on the sub-frame assembly, and the fifth pulley, the sixth pulley, the seventh pulley and the eighth pulley are respectively arranged at the top corners of the third fixing plates;

[0014] One end of the first steel wire rope is fixedly connected to the first locking plate, and the other end of the first steel wire rope is fixedly connected to the second locking plate after passing through the first pulley, the second pulley, the first pulley, the third pulley, the fourth pulley, the fifth pulley, the sixth pulley, the seventh pulley, the eighth pulley, the ninth pulley, the tenth pulley, the eleventh pulley, the twelfth pulley, and the eleventh pulley in sequence;

[0015] The auxiliary frame assembly is provided with a transverse slide rail, and the two sides of the movable plate are provided with third running wheels matched with the transverse slide rail.

[0016] On the basis of the above technical solution, the support leg assembly is a door-shaped structure, including a top plate and two side plates, and the top plate is provided with a first fixed seat; the lower end of the support leg assembly is hinged to the first fixed seat through a first longitudinally arranged rotating shaft; the support leg assembly also includes a connecting seat, a second fixed seat and a guide column; the side of the connecting seat is fixedly connected to the telescopic slide rail, and a threaded sleeve is provided on the top of the connecting seat; the second fixed seat is fixedly connected to the top plate, and a guide sleeve is provided on the second fixed seat; the guide column is inserted in the guide sleeve, and the lower end of the guide column passes through the second fixed seat and is threadedly connected to the threaded sleeve; a limiting pin is provided between the guide column and the threaded sleeve.

[0017] On the basis of the above technical solution, the telescopic slide rail includes an outer slide rail, a first inner slide rail and a second inner slide rail; the first inner slide rail is slidably connected to the outer side surface of the outer slide rail, and the first inner slide rail is fixedly connected to the connecting seat through a first bracket; the second inner slide rail is slidably connected to the inner side surface of the outer slide rail, and the second inner slide rail is fixedly connected to the scissor lift through a second bracket;

[0018] The telescopic slide rail further comprises a telescopic oil cylinder, the cylinder body of the telescopic oil cylinder is connected to the corresponding connecting seat through a latch, and the piston rod of the telescopic oil cylinder is connected to the outer slide rail through a latch;

[0019] Positioning pulleys are respectively provided at both ends of the outer slide rail, and second steel wire ropes are respectively wound around the positioning pulleys. Both ends of the second steel wire rope located at the distal end are respectively fixed to the proximal ends of the first inner slide rail and the second inner slide rail by locks, and both ends of the second steel wire rope located at the proximal end are respectively fixed to the distal ends of the first inner slide rail and the second inner slide rail by locks.

[0020] On the basis of the above technical solution, the leg assembly includes an outer sleeve, an inner sleeve and a lifting cylinder. The upper end of the outer sleeve is fixedly connected to the sub-frame assembly, the cylinder body of the lifting cylinder is connected to the outer sleeve through a second rotating shaft, the piston rod of the lifting cylinder is connected to the inner sleeve through a third rotating shaft, and the lower end of the inner sleeve is hinged to the first mounting seat through a longitudinally arranged first rotating shaft.

[0021] On the basis of the above technical solution, the scissor lift includes a base plate assembly, the base plate assembly is connected to the lifting plate assembly through a fork arm assembly, and the drag plate can reciprocate horizontally along the axial direction of the lifting plate assembly; the cylinder body of the lifting cylinder is hinged to the base plate assembly through a first connecting shaft, and the piston rod of the lifting cylinder is hinged to the fork arm assembly through a second connecting shaft;

[0022] The fork arm assembly includes a first fork arm and a second fork arm, the middle parts of the first fork arm and the second fork arm are hinged by a first pin shaft, the proximal end of the first fork arm is hinged to the lifting plate assembly by a second pin shaft, the proximal end of the second fork arm is hinged to the base plate assembly by a third pin shaft, the distal end of the first fork arm is connected to a first friction roller adapted to the base plate assembly, the distal end of the second fork arm is connected to a second friction roller adapted to the lifting plate assembly; the first friction roller is connected to a lower push plate, and the second friction roller is connected to an upper push plate.

[0023] On the basis of the above technical solution, the base plate assembly includes two first mounting plates arranged in parallel, and the two ends of the two first mounting plates are respectively connected by a first connecting rod; a first avoidance space is arranged between the two first mounting plates, and a first mounting seat for connecting the lifting cylinder is arranged at the proximal end of the first avoidance space; the cross section of the first mounting plate is a U-shaped structure with an opening facing upward, and the inner bottom wall of the first mounting plate forms a first guide surface adapted to the first friction roller, and a second mounting seat for connecting the second fork arm is arranged at the proximal end of the first guide surface;

[0024] Floating wheels are respectively arranged axially at both ends of the first avoidance space, and the floating wheels include a first wheel seat and a second wheel seat; the cross-sections of the first wheel seat and the second wheel seat are both U-shaped structures with openings facing downwards, a waist-shaped hole is opened on the side wall of the first wheel seat, and a positioning column is arranged on the inner top wall of the first wheel seat; the second wheel seat is arranged in the opening of the first wheel seat, and the outer top wall of the second wheel seat is connected to the positioning column through a spring; a wheel body is arranged in the opening of the second wheel seat, and the wheel axle of the wheel body passes through the side wall of the second wheel seat and is connected to the waist-shaped hole;

[0025] The lifting plate assembly includes two second mounting plates arranged in parallel, and the two ends of the two second mounting plates are respectively connected by a second connecting rod; a second avoidance space is arranged between the two second mounting plates, the cross section of the second mounting plate is a U-shaped structure with an opening facing downward, and the inner top wall of the second mounting plate forms a second guide surface adapted to the second friction roller, and the proximal end of the second guide surface is provided with a third mounting seat for connecting the first fork arm; a limiting groove is arranged on the side wall of the second mounting plate, and a reinforcing rib is arranged at a position corresponding to the limiting groove in the second avoidance space;

[0026] The cross section of the carriage is a U-shaped structure with the opening facing downward; the two side walls of the second mounting plate are respectively provided with a plurality of second guide rollers adapted to the inner top wall of the carriage, and the outer side wall of the second mounting plate is provided with a plurality of second friction blocks adapted to the inner side wall of the carriage;

[0027] The width of the end of the second mounting plate gradually narrows to form a guide portion, which facilitates the sliding of the drag plate into and out of the lifting plate assembly.

[0028] The beneficial effects of the present invention are:

[0029] The present invention makes full use of the narrow space under the chassis of the car. The scissor lift can be completely hidden under the chassis of the car, and the subframe assembly occupies less space above the chassis, thereby greatly reducing the height of the faulty car on the tow truck. The four legs are independently controlled and can adapt to complex ground. The scissor lift can be extended to the left or right at the same time, thereby realizing two-way side installation, so it is more versatile. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A perspective view of a fork-lift side-mounted tow truck in an embodiment of the present invention;

[0031] Figure 2 It is a front view of a fork-lift side-mounted tow truck in an embodiment of the present invention;

[0032] Figure 3 It is a working state diagram of a fork-lift side-mounted tow truck in an embodiment of the present invention;

[0033] Figure 4 It is a working principle diagram of a fork-lift side-mounted tow truck in an embodiment of the present invention;

[0034] Figure 5 A three-dimensional diagram of a symmetrical traction and telescopic mechanism in an embodiment of the present invention;

[0035] Figure 6 A three-dimensional diagram of a transverse guide rail mechanism in an embodiment of the present invention;

[0036] Figure 7 This is a front view of the traction trolley in an embodiment of the present invention;

[0037] Figure 8 A side view of a traction trolley in an embodiment of the present invention;

[0038] Fig. 9 It is a structural schematic diagram of a transmission mechanism in an embodiment of the present invention;

[0039] Fig.10 It is a schematic structural diagram of the first fixing plate in an embodiment of the present invention;

[0040] Fig.11 is a schematic structural diagram of a second fixing plate in an embodiment of the present invention;

[0041] Fig.12 It is a structural schematic diagram of a moving plate in an embodiment of the present invention;

[0042] Fig.13 is a schematic structural diagram of a third fixing plate in an embodiment of the present invention;

[0043] Fig.14 This is a working principle diagram of the transmission mechanism in an embodiment of the present invention;

[0044] Fig.15 It is a structural schematic diagram of a support leg assembly in an embodiment of the present invention;

[0045] Fig.16 for Fig.15 A top view of

[0046] Fig.17 for Fig.15 Left view of

[0047] Fig.18 for Fig.17 A cross-sectional view of

[0048] Fig.19 It is a structural schematic diagram of a leg assembly in an embodiment of the present invention;

[0049] Fig. 20 is a cross-sectional view of a leg assembly according to an embodiment of the present invention;

[0050] Fig.21 It is a structural schematic diagram of a telescopic slide rail in an embodiment of the present invention;

[0051] Fig. 22 A side view of a telescopic slide rail according to an embodiment of the present invention;

[0052] Fig.23 Schematic diagram of the working state of the telescopic slide rail in an embodiment of the present invention;

[0053] Fig.24 is a three-dimensional diagram of a scissor lift in an embodiment of the present invention;

[0054] Fig.25 is a front view of a scissor lift in an embodiment of the present invention;

[0055] Fig.26 is a side view of a scissor lift in an embodiment of the present invention;

[0056] Fig. 27 for Fig.25 Sectional view along AA direction;

[0057] Fig.28 for Fig.25 Cross-sectional view along the BB direction;

[0058] Fig.29 is a three-dimensional diagram of a base plate assembly according to an embodiment of the present invention;

[0059] Fig.30 is a cross-sectional view of a base plate assembly according to an embodiment of the present invention;

[0060] Fig.31 A three-dimensional diagram of a floating wheel in an embodiment of the present invention;

[0061] Fig.32 A three-dimensional diagram of a lifting plate assembly in an embodiment of the present invention;

[0062] Fig.33 A bottom view of the lifting plate assembly in an embodiment of the present invention;

[0063] Fig.34 2 is a three-dimensional diagram of a carriage according to an embodiment of the present invention.

[0064] Reference numerals:

[0065] 1- Subframe assembly;

[0066] 2-Symmetrical traction and telescopic mechanism;

[0067] 21- transverse guide rail mechanism; 211- linear guide rail; 212- first guide roller; 213- first friction block; 214- steering shaft;

[0068] 22-traction trolley; 221-trolley body; 222-traction plate; 223-connecting column; 224-first running wheel; 225-second running wheel; 226-tow pin; 227-upper clamping block; 228-lower clamping block;

[0069] 23-Traction cylinder;

[0070] 24-transmission mechanism; 2401-first pulley; 2402-second pulley; 2403-third pulley; 2404-fourth pulley; 2405-fifth pulley; 2406-sixth pulley; 2407-seventh pulley; 2408-eighth pulley; 2409-ninth pulley; 2410-tenth pulley; 2411-eleventh pulley; 2412-twelfth pulley; 2413-first fixed plate; 2414-second fixed plate; 2415-movable plate; 2416-third fixed plate; 2417-first steel wire rope; 2418-first locking plate; 2419-second locking plate; 2420-third walking wheel; 2421-transverse slide rail;

[0071] 3-support leg assembly; 301-top plate; 302-side plate; 303-first fixed seat; 304-first rotating shaft; 305-second fixed seat; 306-guide sleeve; 307-guide column; 308-connecting seat; 309-threaded sleeve; 310-limiting pin;

[0072] 4-leg assembly; 41-outer sleeve; 42-inner sleeve; 43-lifting cylinder; 44-second rotating shaft; 45-third rotating shaft;

[0073] 5-telescopic slide rail; 51-outer slide rail; 52-first inner slide rail; 53-second inner slide rail; 54-first bracket; 55-second bracket; 56-positioning pulley; 57-locking buckle; 58-second steel wire rope; 59-telescopic oil cylinder;

[0074] 6-Scissor lift;

[0075] 61-bottom plate assembly; 6101-first mounting plate; 6102-first connecting rod; 6103-first avoidance space; 6104-first guide surface; 6105-first mounting seat; 6106-second mounting seat; 6107-floating wheel; 6108-first wheel seat; 6109-waist-shaped hole; 6110-second wheel seat; 6111-wheel body; 6112-wheel axle; 6113-positioning column; 6114-spring;

[0076] 62-lifting plate assembly; 6201-second mounting plate; 6202-second connecting rod; 6203-second avoidance space; 6204-second guide surface; 6205-third mounting seat; 6206-second guide roller; 6207-second friction block; 6208-guide portion; 6209-limiting groove; 6210-reinforcement rib;

[0077] 63-fork arm assembly; 631-first fork arm; 632-second fork arm; 633-first pin shaft; 634-second pin shaft; 635-third pin shaft; 636-lower push plate; 637-first friction roller; 638-upper push plate; 639-second friction roller;

[0078] 64-lifting cylinder; 641-first connecting shaft; 642-second connecting shaft;

[0079] 7-drag plate; 71-connection hole. DETAILED DESCRIPTION

[0080] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions.

[0081] In the description of the present invention, it should be noted that directional words, such as the terms "center", "lateral (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of narrating the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of the present invention.

[0082] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. Therefore, the definition of "first" and "second" features can explicitly or implicitly include one or more of the features. In the description of the present invention, "several" and "a number" mean two or more, unless otherwise clearly and specifically defined.

[0083] The following is a further description of the specific embodiments of the present invention in conjunction with the drawings of the specification, so that the technical solution and its beneficial effects of the present invention are clearer and more explicit. The following description of the embodiments with reference to the drawings is exemplary and intended to explain the present invention, but cannot be understood as limiting the present invention.

[0084] See also Figure 1 to Figure 4 As shown, an embodiment of the present invention provides a fork-lift side-mounted tow truck, comprising a sub-frame assembly 1 fixed on a vehicle beam, two scissor lifts 6 are arranged in parallel in the horizontal direction below the sub-frame assembly 1, and a support leg assembly 3 is arranged across both ends of each scissor lift 6, the support leg assembly 3 is connected to the sub-frame assembly 1 through a leg assembly 4, and the support leg assembly 3 is connected to the corresponding scissor lift 6 through a telescopic slide rail 5, which is used to drive the scissor lift 6 to extend horizontally from the bottom of the sub-frame assembly 1 and reset;

[0085] A symmetrical traction and telescopic mechanism 2 is provided on the sub-frame assembly 1 , and two supporting plates are provided in parallel along the lateral direction on the symmetrical traction and telescopic mechanism 2 , and the symmetrical traction and telescopic mechanism 2 is used to drive the supporting plates to move to the scissor lift 6 and reset.

[0086] When the side-mounted road tow truck is not performing rescue operations, the scissor lifts are completely hidden under the chassis and have a certain height from the ground, making full use of the narrow space under the chassis of the car without affecting the overall dimensions below the chassis of the tow truck. The legs can independently control the telescopic length, allowing the tow truck to adapt to the inclined ground and make the towing plate parallel to the ground where the faulty vehicle is located. The front and rear scissor lifts can be synchronously extended to the bottom of the chassis of the faulty vehicle and close to the front and rear wheels of the faulty vehicle respectively, thereby maximally ensuring the stability of the entire vehicle when the tow truck performs rescue operations.

[0087] See also Figures 5 to 14 As shown, the symmetrical traction telescopic mechanism 2 includes a traction cylinder 23, two transverse guide rail mechanisms 21 and two traction trolleys 22; the two transverse guide rail mechanisms 21 are arranged parallel and opposite to each other on the sub-frame assembly 1; the two traction trolleys 22 are respectively slidably arranged on the corresponding transverse guide rail mechanisms 21; the traction cylinder 23 is respectively connected to the two traction trolleys 22 through a transmission mechanism 24, which is used to drive the traction trolleys 22 to move; the two carriages 7 are respectively arranged on the corresponding transverse guide rail mechanisms 21 and connected to the traction trolleys 22, and can slide into and out of the transverse guide rail mechanisms 21 driven by the traction trolleys 22.

[0088] The traction and telescopic mechanism has a symmetrical structure and is completely arranged inside the subframe assembly. The overall height of the subframe assembly can be controlled within a relatively small size. Therefore, from the perspective of the overall vehicle appearance, the subframe assembly occupies a relatively small space above the tow truck chassis, which can greatly reduce the ground clearance of the faulty vehicle on the tow truck. By using a traction and telescopic cylinder with a smaller stroke, the faulty vehicle can be translated over a larger lateral distance.

[0089] Specifically, the cross-section of the transverse guide mechanism 21 is a U-shaped structure with an opening facing upward, and the bottom plate of the transverse guide mechanism 21 is provided with a linear guide 211 adapted to the traction trolley 22; steering shafts 214 are provided at both ends of the transverse guide mechanism 21; as shown in FIG33 , the cross-section of the carriage 7 is a U-shaped structure with an opening facing downward, and the top wall of the carriage 7 is provided with a connecting hole 71 adapted to the traction trolley 22; the two side plates of the transverse guide mechanism 21 are respectively provided with a plurality of first guide rollers 212 adapted to the inner top wall of the carriage 7, and the outer sides of the two side plates of the transverse guide mechanism 21 are respectively provided with a plurality of first friction blocks 213 adapted to the inner side walls of the carriage 7.

[0090] Specifically, the traction trolley 22 includes a trolley body 221, and the first running wheel 224 and the second running wheel 225 are provided at both ends of the bottom of the trolley body 221, and the height of the first running wheel 224 is higher than the second running wheel 225; the top of the trolley body 221 is connected to the traction plate 222 through a connecting column 223, and the traction plate 222 is provided with a towing pin 226 for connecting to the towing plate 7; the bottom of the traction plate 222 is provided with an upper clamping block 227, and the top of the trolley body 221 is provided with a lower clamping block 228.

[0091] Specifically, the transmission mechanism 24 includes two symmetrically arranged first steel wire ropes 2417, and the two first steel wire ropes 2417 are respectively connected to the corresponding traction trolley 22 through a pulley block; the pulley block includes a moving plate 2415, a first fixed plate 2413, a second fixed plate 2414 and two third fixed plates 2416;

[0092] The first fixing plate 2413 and the second fixing plate 2414 are arranged on the sub-frame assembly 1 in a transverse direction opposite to each other; the first fixing plate 2413 is provided with a first locking plate 2418 for fixing the ends of the two first steel wire ropes 2417, and the second pulley 2402, the third pulley 2403 and the fourth pulley 2404 are respectively arranged on both sides of the first locking plate 2418; the second fixing plate 2414 is provided with a second locking plate 2419 for fixing the other ends of the two first steel wire ropes 2417, and the ninth pulley 2409, the tenth pulley 2410 and the twelfth pulley 2412 are respectively arranged on both sides of the second locking plate 2419;

[0093] The movable plate 2415 is disposed between the first fixed plate 2413 and the second fixed plate 2414 in a transversely sliding manner and is connected to the piston rod of the traction cylinder 23; the first pulley 2401 and the eleventh pulley 2411 are disposed on both sides of the top surface of the movable plate 2415;

[0094] The two third fixing plates 2416 are longitudinally arranged opposite to each other on the sub-frame assembly 1, and the fifth pulley 2405, the sixth pulley 2406, the seventh pulley 2407 and the eighth pulley 2408 are respectively arranged at the top corners of the third fixing plates 2416;

[0095] One end of the first steel wire rope 2417 is fixedly connected to the first locking plate 2418, and the other end of the first steel wire rope 2417 is fixedly connected to the second locking plate 2419 after passing through the first pulley 2401, the second pulley 2402, the first pulley 2401, the third pulley 2403, the fourth pulley 2404, the fifth pulley 2405, the sixth pulley 2406, the seventh pulley 2407, the eighth pulley 2408, the ninth pulley 2409, the tenth pulley 2410, the eleventh pulley 2411, the twelfth pulley 2412, and the eleventh pulley 2411 in sequence;

[0096] A transverse slide rail 2421 is provided on the auxiliary frame assembly 1, and third running wheels 2420 adapted to the transverse slide rail 2421 are provided on both sides of the moving plate 2415. This can prevent the moving plate from flipping forward and backward when it moves transversely under the action of the traction cylinder.

[0097] See also Figure 15 to Figure 23 As shown, the support leg assembly 3 is a door-shaped structure, including a top plate 301 and two side plates, and the top plate 301 is provided with a first fixed seat 303; the lower end of the leg assembly 4 is hinged to the first fixed seat 303 through a first rotating shaft 304 arranged longitudinally; the support leg assembly 3 also includes a connecting seat 308, a second fixed seat 305 and a guide column 307; the side of the connecting seat 308 is fixedly connected to the telescopic slide rail 5, and the top of the connecting seat 308 is provided with a threaded sleeve 309; the second fixed seat 305 is fixedly connected to the top plate 301, and a guide sleeve 306 is provided on the second fixed seat 305; the guide column 307 is inserted into the guide sleeve 306, and the lower end of the guide column 307 passes through the second fixed seat 305 and is threadedly connected to the threaded sleeve 309; a limiting pin 310 is provided between the guide column 307 and the threaded sleeve 309. The purpose of achieving a small angle flip in the front and rear direction is to adapt to complex ground conditions, so that the door-shaped support legs can be completely on the ground, avoiding problems such as shaking caused by the support legs not being completely on the ground due to uneven ground. During assembly, the scissor lift and telescopic rails can be assembled as a whole before being assembled with the support legs. This can not only eliminate the cumulative errors caused by some manufacturing, but also enable the telescopic rails and scissor lift to extend or retract smoothly on the ground with foreign objects such as gravel without causing bumps.

[0098] Specifically, the telescopic slide rail 5 includes an outer slide rail 51, a first inner slide rail 52, and a second inner slide rail 53; the first inner slide rail 52 is slidably connected to the outer side surface of the outer slide rail 51, and the first inner slide rail 52 is fixedly connected to the connecting seat 308 through a first bracket 54; the second inner slide rail 53 is slidably connected to the inner side surface of the outer slide rail 51, and the second inner slide rail 53 is fixedly connected to the scissor lift 6 through a second bracket 55;

[0099] The telescopic slide 5 also includes a telescopic oil cylinder 59, the cylinder body of the telescopic oil cylinder 59 is connected to the corresponding connecting seat 308 through a latch, and the piston rod of the telescopic oil cylinder 59 is connected to the outer slide 51 through a latch; specifically, the left and right ends of the telescopic oil cylinder are respectively provided with a first socket and a second socket, the outer layer and the middle layer of the two-stage telescopic slide are respectively provided with a fifth socket and a seventh socket corresponding to the first socket and the second socket, and the fifth socket and the seventh socket are respectively penetrated with a first latch and a second latch, wherein the first latch sequentially passes through the fifth socket and the first socket and is connected and fixed to the left end of the telescopic oil cylinder, and the second latch sequentially passes through the seventh socket and the second socket and is connected and fixed to the right end of the telescopic oil cylinder. The left and right ends of the telescopic oil cylinder are also respectively provided with a third socket and a fourth socket, and the middle layer and the outer layer of the two-stage telescopic slide are respectively provided with an eighth socket and a sixth socket corresponding to the third socket and the fourth socket.

[0100] The extension direction of the scissor lift and the telescopic cylinder is the same, and the extension stroke of the scissor lift is twice that of the telescopic cylinder. When the extension direction of the scissor lift and the telescopic cylinder needs to be switched, the first latch and the second latch are simply swapped so that the left end of the telescopic cylinder is connected and fixed to the middle layer of the two-stage telescopic slide rail, and the right end of the lifting telescopic cylinder is connected and fixed to the outer layer of the two-stage telescopic slide rail.

[0101] Positioning pulleys 56 are respectively provided at both ends of the outer slide rail 51, and a second steel wire rope 58 is respectively wound around the positioning pulley 56. Both ends of the second steel wire rope 58 located at the distal end are respectively fixed to the proximal ends of the first inner slide rail 52 and the second inner slide rail 53 by means of lock buckles 57, and both ends of the second steel wire rope 58 located at the proximal end are respectively fixed to the distal ends of the first inner slide rail 52 and the second inner slide rail 53 by means of lock buckles 57.

[0102] Specifically, the leg assembly 4 includes an outer sleeve 41, an inner sleeve 42 and a lifting cylinder 43. The upper end of the outer sleeve 41 is fixedly connected to the sub-frame assembly 1, the cylinder body of the lifting cylinder 43 is connected to the outer sleeve 41 through a second rotating shaft 44, the piston rod of the lifting cylinder 43 is connected to the inner sleeve 42 through a third rotating shaft 45, and the lower end of the inner sleeve 42 is hinged to the first mounting seat 6105 through a longitudinally arranged first rotating shaft 304.

[0103] See also Figure 24 to Figure 33 As shown, the scissor lift 6 includes a bottom plate assembly 61, which is connected to a lifting plate assembly 62 via a fork arm assembly 63, and the drag plate 7 can reciprocate horizontally along the axial direction of the lifting plate assembly 62; the cylinder body of the lifting cylinder 64 is hinged to the bottom plate assembly 61 via a first connecting shaft 641, and the piston rod of the lifting cylinder 64 is hinged to the fork arm assembly 63 via a second connecting shaft 642;

[0104] The fork arm assembly 63 includes a first fork arm 631 and a second fork arm 632. The middle parts of the first fork arm 631 and the second fork arm 632 are hinged by a first pin shaft 633. The proximal end of the first fork arm 631 is hinged to the lifting plate assembly 62 by a second pin shaft 634. The proximal end of the second fork arm 632 is hinged to the bottom plate assembly 61 by a third pin shaft 635. The distal end of the first fork arm 631 is connected to a first friction roller 637 adapted to the bottom plate assembly 61. The distal end of the second fork arm 632 is connected to a second friction roller 639 adapted to the lifting plate assembly 62. The first friction roller 637 is connected to a lower push plate 636. The second friction roller 639 is connected to an upper push plate 638. The push plate pushes the sand remaining on the bottom plate on the left and right sides of the roller, so that the lifting action of the scissor lift is more stable.

[0105] Specifically, the bottom plate assembly 61 includes two first mounting plates 6101 arranged in parallel, and the two ends of the two first mounting plates 6101 are connected by a first connecting rod 6102 respectively; a first avoidance space 6103 is arranged between the two first mounting plates 6101, and a first mounting seat 6105 for connecting the lifting cylinder 64 is arranged at the proximal end of the first avoidance space 6103; the cross section of the first mounting plate 6101 is a U-shaped structure with an opening facing upward, and the inner bottom wall of the first mounting plate 6101 forms a first guide surface 6104 adapted to the first friction roller 637, and a second mounting seat 6106 for connecting the second fork arm 632 is arranged at the proximal end of the first guide surface 6104;

[0106] Floating wheels 6107 are axially arranged at both ends of the first avoidance space 6103, and the floating wheel 6107 includes a first wheel seat 6108 and a second wheel seat 6110; the cross-sections of the first wheel seat 6108 and the second wheel seat 6110 are both U-shaped structures with the opening facing downward, a waist-shaped hole 6109 is provided on the side wall of the first wheel seat 6108, and a positioning column 6113 is provided on the inner top wall of the first wheel seat 6108; the second wheel seat 6110 is arranged in the opening of the first wheel seat 6108, and the outer top wall of the second wheel seat 6110 is connected to the positioning column 6113 through a spring 6114; a wheel body 6111 is arranged in the opening of the second wheel seat 6110, and the wheel axle 6112 of the wheel body 6111 passes through the side wall of the second wheel seat 6110 and is connected to the waist-shaped hole 6109;

[0107] The lifting plate assembly 62 includes two second mounting plates 6201 arranged in parallel, and the two ends of the two second mounting plates 6201 are connected by a second connecting rod 6202 respectively; a second avoidance space 6203 is arranged between the two second mounting plates 6201, the cross section of the second mounting plate 6201 is a U-shaped structure with the opening facing downward, and the inner top wall of the second mounting plate 6201 forms a second guide surface 6204 adapted to the second friction roller 639, and the proximal end of the second guide surface 6204 is provided with a third mounting seat 6205 for connecting the first fork arm 631; a limiting groove 6209 is arranged on the side wall of the second mounting plate 6201, and a reinforcing rib 6210 is arranged at a position corresponding to the second avoidance space 6203 and the limiting groove 6209;

[0108] The cross section of the carriage 7 is a U-shaped structure with the opening facing downward; the two side walls of the second mounting plate 6201 are respectively provided with a plurality of second guide rollers 6206 adapted to the inner top wall of the carriage 7, and the outer side wall of the second mounting plate 6201 is provided with a plurality of second friction blocks 6207 adapted to the inner side wall of the carriage 7;

[0109] The width of the end of the second mounting plate 6201 gradually narrows to form a guide portion 6208 , which facilitates the sliding of the drag plate 7 into and out of the lifting plate assembly 62 .

[0110] When the scissor lift is extended to the bottom of the faulty vehicle chassis, the rest of the bottom of the scissor lift except the floating wheels maintains a certain height above the ground; when the load of the scissor lift gradually increases to a certain extent during the lifting process, the floating wheels begin to move upward relative to the bottom of the scissor lift until the floating wheels move to the top dead center, after which the bottom of the scissor lift begins to contact the ground over a large area.

[0111] In the description of the specification, the description with reference to the terms "one embodiment", "preferably", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention, and the schematic expressions of the above terms in this specification do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0112] The present invention is not limited to the above-mentioned embodiments. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

Claims

1. A forklift side-mounted tow truck, comprising a subframe assembly (1) fixed to a vehicle beam, characterized in that: Two scissor lifts (6) are arranged in parallel in the transverse direction below the sub-frame assembly (1), and a support leg assembly (3) is arranged across the two ends of each scissor lift (6). The support leg assembly (3) is connected to the sub-frame assembly (1) through a leg assembly (4), and the support leg assembly (3) is connected to the corresponding scissor lift (6) through a telescopic slide rail (5), so as to drive the scissor lift (6) to extend transversely from below the sub-frame assembly (1) and to reset. The sub-frame assembly (1) is provided with a symmetrical traction and telescopic mechanism (2), on which two support plates are arranged in parallel in the transverse direction, and the symmetrical traction and telescopic mechanism (2) is used to drive the support plates to move to the scissor lift (6) and to reset.

2. The fork-lift side-mounted tow truck according to claim 1, characterized in that: The symmetrical traction telescopic mechanism (2) comprises a traction oil cylinder (23), two transverse guide rail mechanisms (21) and two traction trolleys (22); the two transverse guide rail mechanisms (21) are arranged on the auxiliary frame assembly (1) in parallel and opposite to each other; the two traction trolleys (22) are respectively slidably arranged on the corresponding transverse guide rail mechanisms (21); the traction oil cylinder (23) is respectively connected to the two traction trolleys (22) through a transmission mechanism (24) and is used to drive the traction trolleys (22) to move; the two carriages (7) are respectively arranged on the corresponding transverse guide rail mechanisms (21) and are connected to the traction trolleys (22) and can slide into and out of the transverse guide rail mechanisms (21) driven by the traction trolleys (22).

3. The fork-lift side-mounted tow truck as claimed in claim 2, characterized in that: The cross section of the transverse guide rail mechanism (21) is a U-shaped structure with an opening facing upward, and the bottom plate of the transverse guide rail mechanism (21) is provided with a linear guide rail (211) adapted to the traction trolley (22); steering shafts (214) are provided at both ends of the transverse guide rail mechanism (21); the cross section of the carriage (7) is a U-shaped structure with an opening facing downward, and the top wall of the carriage (7) is provided with a connecting hole (71) adapted to the traction trolley (22); the two side plates of the transverse guide rail mechanism (21) are respectively provided with a plurality of first guide rollers (212) adapted to the inner top wall of the carriage (7), and the outer sides of the two side plates of the transverse guide rail mechanism (21) are respectively provided with a plurality of first friction blocks (213) adapted to the inner side wall of the carriage (7).

4. The fork-lift side-mounted tow truck as claimed in claim 2, characterized in that: The traction trolley (22) comprises a trolley body (221), wherein both ends of the bottom of the trolley body (221) are provided with a first running wheel (224) and a second running wheel (225), and the height of the first running wheel (224) is higher than that of the second running wheel (225); the top of the trolley body (221) is connected to a traction plate (222) via a connecting column (223), and a towing pin (226) for connecting to a towing plate (7) is provided on the traction plate (222); an upper clamping block (227) is provided at the bottom of the traction plate (222), and a lower clamping block (228) is provided at the top of the trolley body (221).

5. The fork-lift side-mounted tow truck as claimed in claim 2, characterized in that: The transmission mechanism (24) comprises two symmetrically arranged first steel wire ropes (2417), and the two first steel wire ropes (2417) are respectively connected to the corresponding traction trolley (22) through a pulley block; the pulley block comprises a moving plate (2415), a first fixed plate (2413), a second fixed plate (2414) and two third fixed plates (2416); The first fixing plate (2413) and the second fixing plate (2414) are arranged on the sub-frame assembly (1) in a transverse direction and opposite to each other; the first fixing plate (2413) is provided with a first locking plate (2418) for fixing the ends of the two first steel wire ropes (2417), and the two sides of the first locking plate (2418) are respectively provided with a second pulley (2402), a third pulley (2403) and a fourth pulley (2404); the second fixing plate (2414) is provided with a second locking plate (2419) for fixing the other ends of the two first steel wire ropes (2417), and the two sides of the second locking plate (2419) are respectively provided with a ninth pulley (2409), a tenth pulley (2410) and a twelfth pulley (2412); The movable plate (2415) is arranged between the first fixed plate (2413) and the second fixed plate (2414) in a transverse sliding manner and is connected to the piston rod of the traction cylinder (23); the first pulley (2401) and the eleventh pulley (2411) are arranged on both sides of the top surface of the movable plate (2415); Two third fixing plates (2416) are longitudinally arranged opposite to each other on the sub-frame assembly (1), and a fifth pulley (2405), a sixth pulley (2406), a seventh pulley (2407) and an eighth pulley (2408) are respectively arranged at the top corners of the third fixing plates (2416); One end of the first steel wire rope (2417) is fixedly connected to the first locking plate (2418), and the other end of the first steel wire rope (2417) is fixedly connected to the second locking plate (2419) after passing through the first pulley (2401), the second pulley (2402), the first pulley (2401), the third pulley (2403), the fourth pulley (2404), the fifth pulley (2405), the sixth pulley (2406), the seventh pulley (2407), the eighth pulley (2408), the ninth pulley (2409), the tenth pulley (2410), the eleventh pulley (2411), the twelfth pulley (2412), and the eleventh pulley (2411) in sequence; The auxiliary frame assembly (1) is provided with a transverse slide rail (2421), and third running wheels (2420) adapted to the transverse slide rail (2421) are provided on both sides of the movable plate (2415).

6. The fork-lift side-mounted tow truck as claimed in claim 1, characterized in that: The support leg assembly (3) is a door-shaped structure, comprising a top plate (301) and two side plates, and the top plate (301) is provided with a first fixed seat (303); the lower end of the support leg assembly (4) is hinged to the first fixed seat (303) via a first rotating shaft (304) arranged longitudinally; the support leg assembly (3) also comprises a connecting seat (308), a second fixed seat (305) and a guide column (307); the side of the connecting seat (308) is fixedly connected to the telescopic slide rail (5), and the connecting seat (308) is fixedly connected to the telescopic slide rail (5). A threaded sleeve (309) is provided on the top of the connecting seat (308); the second fixing seat (305) is fixedly connected to the top plate (301), and a guide sleeve (306) is provided on the second fixing seat (305); the guide column (307) is inserted into the guide sleeve (306), and the lower end of the guide column (307) passes through the second fixing seat (305) and is threadedly connected to the threaded sleeve (309); a limit pin (310) is provided between the guide column (307) and the threaded sleeve (309).

7. The fork-lift side-mounted tow truck as claimed in claim 6, characterized in that: The telescopic slide rail (5) comprises an outer slide rail (51), a first inner slide rail (52) and a second inner slide rail (53); the first inner slide rail (52) is slidably connected to the outer side surface of the outer slide rail (51), and the first inner slide rail (52) is fixedly connected to the connecting seat (308) via a first bracket (54); the second inner slide rail (53) is slidably connected to the inner side surface of the outer slide rail (51), and the second inner slide rail (53) is fixedly connected to the scissor lift (6) via a second bracket (55); The telescopic slide rail (5) further comprises a telescopic oil cylinder (59), the cylinder body of the telescopic oil cylinder (59) being connected to the corresponding connecting seat (308) via a latch, and the piston rod of the telescopic oil cylinder (59) being connected to the outer slide rail (51) via a latch; The two ends of the outer slide rail (51) are respectively provided with positioning pulleys (56), and the positioning pulleys (56) are respectively wound with second steel wire ropes (58). The two ends of the second steel wire rope (58) located at the far end are respectively fixed to the proximal ends of the first inner slide rail (52) and the second inner slide rail (53) through lock buckles (57), and the two ends of the second steel wire rope (58) located at the proximal end are respectively fixed to the distal ends of the first inner slide rail (52) and the second inner slide rail (53) through lock buckles (57).

8. The fork-lift side-mounted tow truck as claimed in claim 6, characterized in that: The support leg assembly (4) comprises an outer sleeve (41), an inner sleeve (42) and a lifting cylinder (43); the upper end of the outer sleeve (41) is fixedly connected to the sub-frame assembly (1); the cylinder body of the lifting cylinder (43) is connected to the outer sleeve (41) via a second rotating shaft (44); the piston rod of the lifting cylinder (43) is connected to the inner sleeve (42) via a third rotating shaft (45); and the lower end of the inner sleeve (42) is hinged to the first mounting seat (6105) via a first rotating shaft (304) arranged longitudinally.

9. The fork-lift side-mounted tow truck as claimed in claim 1, characterized in that: The scissor lift (6) comprises a base plate assembly (61), the base plate assembly (61) is connected to the lifting plate assembly (62) via a fork arm assembly (63), and the drag plate (7) can reciprocate horizontally along the axial direction of the lifting plate assembly (62); the cylinder body of the lifting cylinder (64) is hinged to the base plate assembly (61) via a first connecting shaft (641), and the piston rod of the lifting cylinder (64) is hinged to the fork arm assembly (63) via a second connecting shaft (642); The fork arm assembly (63) includes a first fork arm (631) and a second fork arm (632), wherein the middle parts of the first fork arm (631) and the second fork arm (632) are hinged via a first pin shaft (633), the proximal end of the first fork arm (631) is hinged to the lifting plate assembly (62) via a second pin shaft (634), the proximal end of the second fork arm (632) is hinged to the base plate assembly (61) via a third pin shaft (635), the distal end of the first fork arm (631) is connected to a first friction roller (637) adapted to the base plate assembly (61), and the distal end of the second fork arm (632) is connected to a second friction roller (639) adapted to the lifting plate assembly (62); the first friction roller (637) is connected to a lower push plate (636), and the second friction roller (639) is connected to an upper push plate (638).

10. The fork-lift side-mounted tow truck as claimed in claim 9, characterized in that: The base plate assembly (61) includes two first mounting plates (6101) arranged in parallel, and the two ends of the two first mounting plates (6101) are respectively connected by a first connecting rod (6102); a first avoidance space (6103) is arranged between the two first mounting plates (6101), and a first mounting seat (6105) for connecting to a lifting cylinder (64) is arranged at the proximal end of the first avoidance space (6103); the cross section of the first mounting plate (6101) is a U-shaped structure with an opening facing upward, and the inner bottom wall of the first mounting plate (6101) forms a first guide surface (6104) adapted to the first friction roller (637), and a second mounting seat (6106) for connecting to a second fork arm (632) is arranged at the proximal end of the first guide surface (6104); Floating wheels (6107) are respectively arranged along the axial direction at both ends of the first avoidance space (6103), and the floating wheels (6107) include a first wheel seat (6108) and a second wheel seat (6110); the cross-sections of the first wheel seat (6108) and the second wheel seat (6110) are both U-shaped structures with the opening facing downwards, the side wall of the first wheel seat (6108) is provided with a waist-shaped hole (6109), and the inner top wall of the first wheel seat (6108) is provided with a A positioning column (6113) is provided; the second wheel seat (6110) is arranged in the opening of the first wheel seat (6108), and the outer top wall of the second wheel seat (6110) is connected to the positioning column (6113) through a spring (6114); a wheel body (6111) is arranged in the opening of the second wheel seat (6110), and the wheel axle (6112) of the wheel body (6111) passes through the side wall of the second wheel seat (6110) and is connected to the waist-shaped hole (6109); The lifting plate assembly (62) comprises two second mounting plates (6201) arranged in parallel, and the two ends of the two second mounting plates (6201) are respectively connected by a second connecting rod (6202); a second avoidance space (6203) is arranged between the two second mounting plates (6201); the cross section of the second mounting plate (6201) is a U-shaped structure with an opening facing downward, and the inner top wall of the second mounting plate (6201) forms a second guide surface (6204) adapted to the second friction roller (639), and the proximal end of the second guide surface (6204) is provided with a third mounting seat (6205) for connecting the first fork arm (631); a limiting groove (6209) is arranged on the side wall of the second mounting plate (6201), and a reinforcing rib (6210) is arranged at a position corresponding to the second avoidance space (6203) and the limiting groove (6209); The cross section of the carriage (7) is a U-shaped structure with its opening facing downward; the two side walls of the second mounting plate (6201) are respectively provided with a plurality of second guide rollers (6206) adapted to the inner top wall of the carriage (7); the outer side wall of the second mounting plate (6201) is provided with a plurality of second friction blocks (6207) adapted to the inner side wall of the carriage (7); The width of the end of the second mounting plate (6201) gradually narrows to form a guide portion (6208), which facilitates the sliding of the drag plate (7) into and out of the lifting plate assembly (62).

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