CN110155912B - Fork truck - Google Patents

Abstract

The invention discloses a forklift, which comprises a frame, a lifting portal frame and an axle. The axle of fork truck can adjust fork truck's wheelbase and focus in this scheme, and fork truck's jack-up portal passes through the traction assembly and is connected with the motor vehicle. Specifically, when carrying goods, the carriage assembly is positioned at the second end of the chute assembly, the wheelbase of the forklift is longest and the gravity center is lowest, and the lifting portal is erected on the frame through the portal rotating assembly to load, unload and carry the goods; when the truck is operated, the carriage assembly is positioned at the first end of the chute assembly, the wheelbase of the forklift is the smallest and the gravity center is the highest, the traction assembly on the lifting portal is connected with the motor vehicle, the lifting portal is folded on the truck frame through the portal rotating assembly, and the motor vehicle is used for traction of the forklift for truck operation.

Description

Fork truck

Technical Field

The invention relates to the technical field of forklifts, in particular to a forklift.

Background

With the development of logistics industry, the requirement on the transportation of goods is higher and higher, so that the logistics efficiency is improved. The link of loading and unloading goods in the logistics industry is the key of logistics safety and efficient transportation.

The forklift has the characteristics of good reliability, high operation efficiency and large bearing capacity, but the traditional forklift has poor maneuvering characteristics, is only suitable for loading, unloading and carrying operation in a certain range, cannot carry out long-distance carrying and transportation, and cannot randomly carry out motor operation.

Therefore, how to improve the maneuvering performance of the forklift, so that the forklift can be transported and transported for a long distance and can randomly move the vehicle for operation becomes a technical problem to be solved by those skilled in the art.

Disclosure of Invention

In view of the above, the invention provides a forklift to improve the maneuvering performance of the forklift, so that the forklift can be transported and transported for a long distance and can randomly move the vehicle.

In order to achieve the above purpose, the present invention provides the following technical solutions:

A forklift, comprising:

A frame;

The lower end of the lifting portal is connected with the frame through a portal rotating assembly, and the upper end of the lifting portal is provided with a traction assembly which can be connected with a motor vehicle;

an axle, the axle is installed the lower terminal surface of frame, the axle includes:

Bridge pipes, two ends of which can be provided with tires;

The sliding chute assemblies are fixed on the frame, the number of the sliding chute assemblies is two, the sliding chute assemblies are oppositely arranged on the frame, the two sliding chute assemblies are arranged along the axial direction of the bridge pipe, and the inclined direction of the sliding chute assemblies extends upwards from the lower part of the front end of the frame to the upper part of the rear end of the frame;

The sliding frame assembly is mounted on the bridge pipe, the length extending direction of the sliding frame assembly is consistent with the axis direction of the bridge pipe, the sliding frame assembly slides along the sliding groove assembly through the first telescopic cylinder, and the sliding frame assembly is fixed on the sliding groove assembly through the locking assembly.

Preferably, in the forklift, the mast rotating assembly includes:

a mounting table fixed to the frame;

The cylinder bodies of the second telescopic cylinders are hinged with the frame, and the number of the second telescopic cylinders is two and symmetrically distributed on two sides of the mounting table;

The rotating frame is obliquely arranged relative to the lifting door frame, the oblique direction of the rotating frame is consistent with the folding direction of the lifting door frame, the upper end of the rotating frame is fixedly connected with the lower end of the lifting door frame, the lower end of the rotating frame is hinged with a piston rod of the second telescopic cylinder, the lower end of the rotating frame can prop against the frame, and the rotating frame is hinged with the upper end of the side wall of the mounting table.

Preferably, in the forklift, the rotating frame includes:

the end part of the supporting rod is hinged with a piston rod of the second telescopic cylinder;

the first mounting plate is fixedly connected with the lower end of the lifting portal and is parallel to the supporting rod;

The L-shaped mounting plates are multiple in number and uniformly distributed at two ends of the length direction of the first mounting plate, the L-shaped mounting plates are perpendicular to the length extending direction of the first mounting plate, the L-shaped mounting plates comprise second mounting plates fixedly connected with the first mounting plates and third mounting plates obliquely arranged relative to the second mounting plates, the oblique direction of the third mounting plates is consistent with the folding direction of the lifting portal frame, one side, far away from the first mounting plates, of the second mounting plates is hinged to the upper end of the side wall of the mounting table, and the lower ends of the third mounting plates are provided with mounting holes matched with the supporting rods.

Preferably, in the forklift, the lifting mast comprises:

The lower end of the rail is fixedly connected with the upper end of the rotating frame, and the traction assembly is arranged at the upper end of the rail;

the sliding frame is slidably mounted on the rail, and slides back and forth along the rail through a third telescopic cylinder, and a roller matched with the rail is arranged on the sliding frame;

The lifting arm is hinged with the lower end of the sliding frame, the other end of the lifting arm is pulled up and down through the fourth telescopic cylinder, and a pull rope for lifting goods is arranged on the lifting arm.

Preferably, in the forklift, the traction assembly includes:

One end of the hinged plate is hinged with the upper end of the lifting portal;

and one end of the hinging rod is hinged with the other end of the hinged plate, and the other end of the hinging rod is hinged with the motor vehicle.

Preferably, in the forklift, the axle further comprises two shock absorbing components, the shock absorbing components are respectively arranged at two ends of the axle tube in the axial direction, the shock absorbing components are hinged with the carriage component,

The shock absorbing assembly includes:

the mounting block is provided with a mounting hole matched with the bridge pipe;

The shock absorber is hinged with the mounting block at one end, and is hinged with the sliding frame assembly at the other end;

The middle part of the plate spring is fixed on the mounting block through a U-shaped bolt, the length extending direction of the plate spring is perpendicular to the bridge pipe, and two ends of the plate spring in the length direction are hinged with the sliding frame component.

Preferably, in the forklift, the carriage assembly includes:

The first sliding plate is provided with a first front roller and a first rear roller which are matched with the chute assembly at two ends in the length direction respectively;

The second sliding plate is parallel to the first sliding plate, and the second front roller and the second rear roller matched with the chute assembly are arranged at two ends of the second sliding plate in the length direction;

The two ends of the first connecting plate in the length direction are respectively and vertically connected with the upper ends of the middle parts of the first sliding plate and the second sliding plate;

The second connecting plate is parallel to the first connecting plate, two ends of the second connecting plate in the length direction are respectively and vertically connected with the first sliding plate and the lower end of the middle of the second sliding plate, and the second connecting plate or the first connecting plate is hinged with a piston rod of the first telescopic cylinder.

Preferably, in the forklift, the chute assembly includes:

The first sliding groove is matched with the first front roller;

the second sliding groove is opposite to the first sliding groove and is arranged in parallel, and the second sliding groove is matched with the second front roller;

the third sliding groove is positioned below the first sliding groove, parallel to the first sliding groove and positioned on the same side of the frame, and is matched with the first rear roller;

The fourth chute is positioned below the second chute, parallel to the second chute and positioned on the same side of the frame, the fourth chute is matched with the second rear roller, and the inclination direction of the fourth chute extends from the lower direction of the front end of the frame to the upper side of the rear end of the frame.

Preferably, in the forklift, the locking assembly includes:

A positioning pin;

The first positioning holes are formed in the upper ends of the first sliding groove and the second sliding groove;

the second positioning holes are formed in the lower ends of the third sliding groove and the fourth sliding groove;

The third locating holes are formed in the first sliding plate and the second sliding plate and can be matched with the first locating holes and the second locating holes, and the locating pins can be inserted into the third locating holes.

Preferably, in the forklift, the forklift further comprises a clamping component arranged on the frame and used for clamping the axle tube at the upper end of the third chute,

The clamping assembly comprises:

an upper clamping block fixed on the frame;

The lower clamping block is fixed on the frame and positioned at the lower end of the upper clamping block, and one end, close to the upper clamping block, of the lower clamping block is an inclined surface.

According to the technical scheme, the forklift provided by the invention comprises a frame, a lifting portal frame and an axle. The upper end face of the frame is provided with a lifting portal, and the lower end face of the frame is provided with an axle; the lower end of the lifting portal is connected with the frame through a portal rotating assembly, and the upper end of the lifting portal is provided with a traction assembly which can be connected with a motor vehicle; the axle includes an axle tube, a chute assembly, and a carriage assembly. The axle of fork truck can adjust fork truck's wheelbase and focus in this scheme, and fork truck's jack-up portal passes through the traction assembly and is connected with the motor vehicle. Specifically, when carrying goods, the carriage assembly is positioned at the second end of the chute assembly, the wheelbase of the forklift is longest and the gravity center is lowest, and the lifting portal is erected on the frame through the portal rotating assembly to load, unload and carry the goods; when the truck is operated, the carriage assembly is positioned at the first end of the chute assembly, the wheelbase of the forklift is the smallest and the gravity center is the highest, the traction assembly on the lifting portal is connected with the motor vehicle, the lifting portal is folded on the truck frame through the portal rotating assembly, and the motor vehicle is used for traction of the forklift for truck operation.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a forklift for transporting to a motor vehicle according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a forklift according to an embodiment of the present invention;

Fig. 3 is a schematic structural diagram of a forklift towed by a motor vehicle according to an embodiment of the present invention;

Fig. 4 is a schematic diagram of stroke limitation of a forklift according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of a structure of an axle and a frame according to an embodiment of the present invention;

FIG. 6 is a front view of a chute assembly according to an embodiment of the invention mated with a vehicle frame;

FIG. 7 is a schematic structural diagram of an axle according to an embodiment of the present invention;

FIG. 8 is a schematic diagram of a carriage assembly according to an embodiment of the present invention;

FIG. 9 is a schematic view of a shock absorbing assembly according to an embodiment of the present invention;

fig. 10 is a schematic structural view of a chute assembly according to an embodiment of the invention.

Wherein,

1. Frame, 2, lifting portal, 21, track, 22, carriage, 23, boom, 3, portal rotation assembly, 31, mount, 32, second telescoping cylinder, 33, rotation frame, 331, support bar, 332, first mounting plate, 333, L-shaped mounting plate, 4, traction assembly, 41, hinged plate, 42, hinged joint, 5, bridge tube, 6, chute assembly, 61, first chute, 62, second chute, 63, third chute, 64, fourth chute, 7, carriage assembly, 71, first sled, 72, second sled, 73, first front roller, 74, first rear roller, 75, second front roller, 76, second rear roller, 77, first connecting plate, 78, second connecting plate, 8, snap-in assembly, 81, upper clip, 82, lower clip, 9, damper assembly, 91, mounting block, 92, plate spring, 93, shock absorber.

Detailed Description

The invention discloses a forklift, which is used for improving the maneuvering performance of the forklift, so that the forklift can be transported and transported for a long distance and can randomly move for operation.

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The invention discloses a forklift, which comprises a frame 1, a lifting portal 2 and an axle.

The upper end face of the frame 1 is provided with a lifting portal 2, and the lower end face of the frame 1 is provided with an axle.

The lower extreme of jack-up portal 2 passes through portal rotation component 3 and is connected with frame 1, and the upper end of jack-up portal 2 is provided with the traction assembly 4 that can be connected with the motor vehicle.

The axle includes an axle tube 5, a chute assembly 6 and a carriage assembly 7.

The two ends of the bridge pipe 5 can be provided with tires, and the two ends of the bridge pipe 5 are respectively provided with a chute assembly 6 and a carriage assembly 7;

The two chute assemblies 6 are fixed on the frame 1, the number of the chute assemblies 6 is two and the chute assemblies 6 are oppositely arranged on the frame 1, in particular, the chute assemblies 6 are arranged below the frame 1, the two chute assemblies 6 are arranged along the axial direction of the bridge pipe 5, the inclination direction of the chute assemblies 6 extends from the lower direction of the front end of the frame 1 to the upper direction of the rear end of the frame 1, the end of the chute assemblies 6 below the front end of the frame 1 is named as a first end, and the end of the chute assemblies 6 above the rear end of the frame 1 is named as a second end;

The bridge pipe 5 is installed on the carriage assembly 7, the length extension direction of the carriage assembly 7 is consistent with the axis direction of the bridge pipe 5, the carriage assembly 7 slides along the chute assembly 6 through the first telescopic cylinder, and the carriage assembly 7 can be fixed on the chute assembly 6 through the locking assembly. Specifically, the cylinder body of the first telescopic cylinder can be hinged with the frame 1, the piston rod of the first telescopic cylinder is hinged with the carriage assembly 7, and the part of the structure of the piston rod of the first telescopic cylinder and the carriage assembly 7 is hinged according to the specific structure of the carriage assembly 7.

The lower extreme of jack-up portal 2 is provided with portal rotation component 3, and jack-up portal 2 realizes folding or erectting on frame 1 of jack-up portal 2 through portal rotation component 3.

The upper end of the lifting portal frame 2 is provided with a traction assembly 4, and the traction assembly 4 is used for realizing connection between a forklift and a motor vehicle, so that the forklift can randomly operate the motor vehicle.

During operation, the carriage assembly 7 drives the axle tube 5 to slide on the chute assembly 6, when the carriage assembly 7 is located at the first end of the chute assembly 6, the wheelbase between the front axle and the rear axle of the forklift is minimum, when the carriage assembly 7 is located at the second end of the chute assembly 6, the wheelbase between the front axle and the rear axle of the forklift is maximum, the distance between the front axle and the rear axle of the forklift is adjusted by sliding the carriage assembly 7 along the chute assembly 6, namely, the wheelbase of the forklift is adjusted, the turning radius of the forklift is changed, in addition, the inclination direction of the chute assembly 6 extends from the lower direction of the front end of the frame 1 to the upper side of the rear end of the frame 1, namely, the vertical heights of the first end and the second end of the chute assembly 6 are different, when the carriage assembly 7 is located at the first end of the chute assembly 6, the vertical height of the axle is higher, when the carriage assembly 7 is located at the second end of the chute assembly 6, the gravity center of gravity of the forklift also changes, and when the height of the forklift is changed, in particular, the carriage assembly 7 is located at the second end of the chute assembly 6, the lowest gravity center of the forklift is located at the shortest, and the center of gravity of the forklift is located at the shortest, and the center of the forklift is located at the shortest.

The axle may be a front axle (also known as a drive axle) or a rear axle (also known as a steering axle) of a forklift.

In a specific embodiment of the scheme, the rear axle is an axle provided by the scheme, and the front axle adopts an axle commonly used in a forklift in the prior art, namely, the wheelbase of the forklift and the gravity center of the forklift are changed through the rear axle;

In another specific embodiment of the present solution, the front axle is an axle provided by the present solution, and the rear axle adopts an axle commonly used in the prior art, that is, the wheelbase of the forklift and the center of gravity of the forklift are changed by the front axle;

In the third embodiment of the scheme, the front axle and the rear axle are axles provided by the scheme, namely, the wheelbase of the forklift and the gravity center of the forklift can be changed through the front axle or the rear axle, and in actual working, the wheelbase of the forklift and the gravity center of the forklift can be changed by only using the front axle as required, the wheelbase of the forklift and the gravity center of the forklift can be changed by only using the rear axle as required, or the front axle and the rear axle can be relatively adjusted to change the wheelbase of the forklift and the gravity center of the forklift simultaneously as required.

The axle that this scheme provided can adjust fork truck's wheelbase and focus, and is according to fork truck's use scene adjustment fork truck's wheelbase and focus, has effectively improved fork truck's maneuver ability for fork truck can be long distance transport, and fork truck passes through the traction assembly 4 and is connected with the motor vehicle moreover, realizes fork truck and follows motor vehicle operation.

When in vehicle-mounted operation, the carriage assembly 7 is positioned at the first end of the chute assembly 6, the lifting portal 2 is folded on the frame 1 through the portal rotation assembly 3, the traction assembly 4 on the lifting portal 2 is connected with a motor vehicle, and the motor vehicle is used for towing a forklift to carry out vehicle-mounted operation; when carrying goods, the carriage assembly 7 is positioned at the second end of the chute assembly 6, and the lifting portal 2 is erected on the frame 1 through the portal rotation assembly 3 to load and unload and carry the goods.

The forklift provided by the scheme can randomly move in traction of the motor vehicle without loading on the chassis of the motor vehicle, so that the transformation of the motor vehicle is reduced, and the operation cost of the forklift along with the motor vehicle is reduced.

In a specific embodiment of the solution, the mast rotation assembly 3 comprises: a mounting table 31, a second telescopic cylinder 32 and a rotating frame 33.

The mounting table 31 is fixed on the frame 1 to realize the connection of the gantry rotation assembly 3 and the frame 1, the mounting table 31 provides a fixed foundation for the mounting of the gantry rotation assembly 3 on the frame 1, in one embodiment of the scheme, the mounting table 31 is welded with the frame 1, or in another embodiment of the scheme, the mounting table 31 is bolted with the frame 1;

The second telescopic cylinders 32 provide power for the rotation of the rotating frame 33, specifically, the cylinder bodies of the second telescopic cylinders 32 are hinged with the frame 1, the piston rods of the second telescopic cylinders 32 are hinged with the rotating frame 33, and the number of the second telescopic cylinders 32 is two and symmetrically distributed on two sides of the mounting table 31, so that the second telescopic cylinders can effectively act on the rotating frame 33;

the rotating frame 33 is obliquely arranged relative to the lifting portal 2, the oblique direction is consistent with the folding direction of the lifting portal 2, the upper end of the rotating frame 33 is fixedly connected with the lower end of the lifting portal 2, the lower end of the rotating frame 33 is hinged with a piston rod of the second telescopic cylinder 32, the lower end of the rotating frame 33 can be abutted against the frame 1, and the rotating frame 33 is hinged with the upper end of the side wall of the mounting table 31.

As shown in fig. 1, the width of the rotating frame 33 is larger than the width of the mount table 31, and both sides in the width direction of the rotating frame 33 are hinged to both side walls in the width direction of the mount table 31, respectively.

The piston rod of the second telescopic cylinder 32 extends out to push the lower end of the rotating frame 33 to rotate around the hinge point of the rotating frame 33 and the mounting table 31, the rotating frame 33 drives the lifting portal 2 to rotate towards the upper surface of the frame 1, and after the piston rod of the second telescopic cylinder 32 extends out to a first preset position, the lifting portal 2 is completely attached to the upper surface of the frame 1, so that the lifting portal 2 is folded on the frame 1; the piston rod of the second telescopic cylinder 32 is retracted, the lower end of the rotating frame 33 is pulled to rotate around the hinge point of the rotating frame 33 and the mounting table 31, the rotating frame 33 drives the lifting gantry 2 to rotate in a direction away from the upper surface of the frame 1, after the piston rod of the second telescopic cylinder 32 is retracted to a second preset position, the lifting gantry 2 is vertical to the upper surface of the frame 1, the lifting gantry 2 is erected, the lifting gantry 2 is in a cargo lifting working state, and at the moment, the lower end of the rotating frame 33 is propped against the upper end surface of the frame 1. As shown in fig. 4, the black filled triangles in fig. 4 represent fixed hinge points and the open triangles represent movable hinge points.

According to the forklift provided by the scheme, after the piston rod of the second telescopic cylinder 32 extends to the first preset position, the piston rod of the second telescopic cylinder 32 continues to extend, the lower end of the rotating frame 33 is pushed upwards, the rotating frame 33 continues to drive the lifting gantry 2 to rotate downwards, the front end of the lifting gantry 2 cannot continue to move downwards due to the fact that the upper end of the lifting gantry 2 is connected with a motor vehicle through the traction assembly 4, the acting force of the piston rod of the second telescopic cylinder 32 on the rotating frame 33 can act on the forklift frame 1 through the cylinder body reaction of the second telescopic cylinder 32, the rear end of the forklift frame 1 rotates downwards around the rear axle of the forklift frame 1, the front end of the forklift frame 1 also rotates upwards around the rear axle of the forklift frame 1, the front axle is kept in a lifted state under the limit of the travel of the second telescopic cylinder 32, and only the rear axle is landed, and the motor vehicle drags the forklift truck moves along with the forklift.

The fork truck that this scheme provided, fork truck's jack-up portal 2 pass through door frame rotation component 3 realize folding or erectting on frame 1. After the lifting portal 2 is folded on the frame 1, the lifting portal 2 is connected with the motor vehicle through a traction assembly 4 arranged at the upper end of the lifting portal 2, after the forklift is connected with the motor vehicle, the lifting portal 2 is continuously folded under the action of the portal rotating assembly 3 until the front axle of the forklift is lifted, and only the rear axle of the forklift is contacted with the ground, so that the difficulty of the motor vehicle in traction of the forklift is reduced.

In one embodiment of the present solution, the rotating frame 33 includes a support bar 331, a first mounting plate 332, and an L-shaped mounting plate 333.

As shown in fig. 1, the rotating frame 33 provided in this embodiment is a rectangular frame.

Specifically, the end of the supporting rod 331 is hinged to the piston rod of the second telescopic cylinder 32, and is the lower frame of the rectangular frame;

The first mounting plate 332 is fixedly connected with the lower end of the lifting portal 2, and the first mounting plate 332 is parallel to the supporting rod 331 and is an upper frame of a rectangular frame;

the plurality of L-shaped mounting plates 333 are uniformly distributed at two ends of the first mounting plate 332 in the length direction, the L-shaped mounting plates 333 positioned at two ends of the first mounting plate 332 in the length direction are left and right frames of a rectangular frame,

The L-shaped mounting plate 333 is perpendicular to the length extension direction of the first mounting plate 332, specifically, the L-shaped mounting plate 333 includes a second mounting plate fixedly connected with the first mounting plate 332 and a third mounting plate obliquely arranged relative to the second mounting plate, an included angle between the second mounting plate and the third mounting plate is an obtuse angle, the oblique direction of the third mounting plate is consistent with the folding direction of the lifting portal 2, one side, far away from the first mounting plate 332, of the second mounting plate is hinged with the upper end of the side wall of the mounting table 31, and the lower end of the third mounting plate is provided with a mounting hole matched with the supporting rod 331. The end of the support rod 331 is hinged to the piston rod of the second telescopic cylinder 32 after being matched with the mounting hole of the third mounting plate.

The support bar 331 is fixedly connected with the L-shaped mounting plate 333, and the first mounting plate 332 is fixedly connected with the L-shaped mounting plate 333 to form the rigid rotating frame 33 with a definite shape.

In a specific embodiment of the present solution, the number of the L-shaped mounting plates 333 is four and evenly distributed at two ends of the first mounting plate 332 in the length direction, that is, two parallel L-shaped mounting plates 333 are disposed at the end of the first mounting plate 332, and two L-shaped mounting plates 333 located at the same end of the first mounting plate 332 are connected by a connecting plate.

The provision of two or more L-shaped mounting plates 333 at the end of the first mounting plate 332 serves to enhance the use strength of the rotating frame 33.

In a specific embodiment of the solution, the lifting mast 2 comprises a rail 21, a carriage 22 and a boom 23.

The lower end of the rail 21 is fixedly connected with the upper end of the rotating frame 33, the upper end of the rail 21 is provided with a traction assembly 4, as shown in fig. 2, the rail 21 comprises two parallel guide rails, and the two guide rails are fixedly connected to form a rectangular rail 21;

The sliding frame 22 is a rectangular sliding frame, the rectangular sliding frame is sleeved on the track 21 and is in sliding fit with the track 21, the sliding frame 22 slides back and forth along the track 21 through a third telescopic cylinder, rollers matched with the track 21 are arranged on the sliding frame 22, as shown in fig. 1, a cylinder body of the third telescopic cylinder is fixedly connected with the lower end of the track 21, a piston rod of the third telescopic cylinder is fixedly connected with the sliding frame 22, and the height of the suspension arm 23 is adjusted through the telescopic action of the piston rod of the third telescopic cylinder, so that goods with different heights can be lifted;

one end of the suspension arm 23 is hinged with the lower end of the carriage 22, the other end of the suspension arm 23 is connected with the carriage 22 through a fourth telescopic cylinder, and a pull rope for lifting goods is arranged on the suspension arm 23.

Specifically, the piston rod of the fourth telescopic cylinder is always in an extending state, the piston rod of the fourth telescopic cylinder extends to a first preset length, the suspension arm 23 is in a horizontal state, the piston rod of the fourth telescopic cylinder continues to extend to a second preset length, the suspension arm 23 is attached to the track 21, and folding of the suspension arm 23 is achieved. The second preset length represents a length value greater than the first preset length.

When the boom 23 is folded on the rail 21, the piston rod of the third telescopic cylinder is extended, lifting the carriage 22 to the highest position of the rail 21.

As shown in fig. 2, the frame 1 is provided with a receiving groove for receiving the carriage 22. After the lifting door frame 2 and the frame 1 are folded, the carriage 22 of the lifting door frame 2 can be positioned in the accommodating groove of the frame 1, so that the volume of the lifting door frame 2 and the frame 1 after being folded is reduced to a certain extent. Preferably, the receiving groove is integrally formed with the frame 1.

In one particular embodiment of the present solution, the traction assembly 4 includes a hinged plate 41 and a hinged lever 42.

As shown in fig. 1 to 4, the number of the hinge plates 41 is two, the two hinge plates 41 are arranged in parallel, the two hinge plates 41 are connected through hinge shafts, one hinge shaft is hinged with the upper end of the lifting portal 2, and the other hinge shaft is hinged with the hinge rod 42;

one end of the hinge lever 42 is hinged to the other hinge shaft of the hinge plate 41, and the other end of the hinge lever 42 is hinged to the vehicle. As shown in fig. 1 to 4, the hinge lever 42 includes a mounting block hinged to the other hinge shaft of the hinge plate 41, a mounting lever fixedly connected to the mounting block, and a ball provided at an end of the mounting lever, the ball being hinged to the motor vehicle.

In order to further improve the traction stability of the forklift along with the motor vehicle, the forklift provided by the scheme further comprises a locking device for locking the lifting gantry 2 on the frame 1.

After the front axle of the forklift is lifted, the lifting door frame 2 is locked on the frame 1 through the locking device, so that the lifting door frame 2 is prevented from shaking when moving along with the vehicle, the locking of the first telescopic cylinder is assisted, and the damage to the first telescopic cylinder is reduced.

Specifically, the first telescopic cylinder, the second telescopic cylinder, the third telescopic cylinder and the fourth telescopic cylinder are all hydraulic cylinders.

In a specific embodiment of the present solution, the locking device comprises a locking pin, a first locking plate and a second locking plate.

The first locking plate is arranged at the upper end of the lifting portal 2, and is positioned between the traction component 4 and the sliding frame 22 of the lifting portal 2 as shown in fig. 1-4, and a first pin hole matched with the locking pin is formed in the first locking plate;

The second locking plate sets up the front end at frame 1, is provided with on the second locking plate with first pinhole complex second pinhole, and the second pinhole is offered along the horizontal direction, and corresponding first pinhole is offered along the horizontal direction also.

After the first pin hole of the first locking plate is matched with the second pin hole of the second locking plate, the locking pin is inserted into the first pin hole and the second pin hole, and locking of the lifting portal 2 on the frame 1 is achieved.

In order to further optimize above-mentioned technical scheme, the axle that provides of this scheme still includes damper 7, and damper 7 can alleviate the ground vibration when fork truck traveles along with the car, reduces the damage to fork truck.

Specifically, the number of the shock absorbing assemblies 9 is two, the two shock absorbing assemblies 9 are respectively arranged at two ends of the axle tube 5 in the axial direction, the shock absorbing assemblies 9 are hinged with the carriage assembly 7, and as shown in fig. 7, the shock absorbing assemblies 9 are arranged between the axle tube 5 and the carriage assembly 7.

In one particular embodiment of the present solution, the shock assembly 9 includes a mounting block 91, a shock absorber 93 and a leaf spring 92.

Specifically, the mounting block 91 is provided with a mounting hole matched with the bridge pipe 5;

The middle part of the plate spring 92 is fixed on the mounting block 91 through a U-shaped bolt, the length extension direction of the plate spring 92 is perpendicular to the axis direction of the bridge pipe 5, two ends of the plate spring 92 in the length direction are hinged with the carriage assembly 7, namely the plate spring 92 is hinged with the broad side of the carriage assembly 7, the plate spring 92 and the carriage assembly 7 are provided with two hinge points, preferably, the length of the plate spring 92 is larger than the width of the carriage assembly 7, so that the connection difficulty of the plate spring 92 and the carriage assembly 7 is reduced;

one end of the shock absorber 93 is hinged to the mounting block 91, and the other end of the shock absorber 93 is hinged to the carriage assembly 7.

In one particular embodiment of the present solution, the carriage assembly 7 includes a first slide plate 71, a second slide plate 72, a first connection plate 77, and a second connection plate 78.

Specifically, the two ends of the first sliding plate 71 in the length direction are respectively provided with a first front roller 73 and a first rear roller 74 which are matched with the chute assembly 6;

The second slide plate 72 is parallel to the first slide plate 71, and two ends of the second slide plate 72 in the length direction are provided with a second front roller 75 and a second rear roller 76 which are matched with the chute assembly 6;

Both ends of the first connecting plate 77 in the length direction are vertically connected to the upper ends of the middle parts of the first and second sliding plates 71 and 72, respectively;

the second connection plate 78 is parallel to the first connection plate 77, and both ends of the second connection plate 78 in the length direction are vertically connected to the middle lower ends of the first slider 71 and the second slider 72, respectively.

Preferably, the first connection plate 77 or the second connection plate 78 is hinged to the piston rod of the first telescopic cylinder.

The carriage assembly 7 is of an I-shaped structure as a whole, and a first connecting plate 77 and a second connecting plate 78 are arranged between the first sliding plate 71 and the second sliding plate 72, namely, the first sliding plate 71 and the second sliding plate 72 are connected through two layers of connecting plates, so that the overall strength of the carriage assembly 7 is enhanced.

As shown in fig. 8, the first and second sliding plates 71 and 72 are connected to the first and second connection plates 77 and 78 by bolts.

As shown in fig. 8, the first front roller 73 and the first rear roller 74, and the second front roller 75 and the second rear roller 76 are all disposed outside the h-shaped carriage assembly 7.

Preferably, the carriage assembly 7 further comprises: an ear plate assembly.

The ear plate assembly is vertically connected to both the first connection plate 77 and the second connection plate 78, and the design of the ear plate assembly enhances the strength between the first connection plate 77 and the second connection plate 78.

Specifically, the number of the ear plate assemblies is two, and the ear plate assemblies are respectively connected with the shock absorber 93 corresponding to the positions of the shock absorbing assemblies 9. Preferably, the ear plate assembly includes two ear plates arranged in parallel, the ear plates being hinged to the shock absorber 93.

In a particular embodiment of the present solution, the chute assembly 6 comprises a first chute 61, a second chute 62, a third chute 63, and a fourth chute 64, wherein

The first sliding groove 61 is matched with the first front roller 73;

the second sliding groove 62 is opposite to the first sliding groove 61 and is arranged in parallel, and the second sliding groove 62 is matched with the second front roller 75;

The third sliding groove 63 is positioned below the first sliding groove 61, parallel to the first sliding groove 61 and positioned on the same side of the frame 1, and the third sliding groove 63 is matched with the first rear roller 74;

The fourth sliding groove 64 is located below the second sliding groove 62, parallel to the second sliding groove 62 and located on the same side of the frame 1, the fourth sliding groove 64 is matched with the second rear roller 76, the inclination direction of the fourth sliding groove 64 extends from the lower front end of the frame 1 to the upper rear end of the frame 1, and correspondingly, the inclination directions of the first sliding groove 61, the second sliding groove 62 and the third sliding groove 63 also extend from the lower front end of the frame 1 to the upper rear end of the frame 1.

The two sliding grooves are arranged on the same side of the frame 1, so that the sliding stability of the sliding frame assembly 7 along the sliding groove assembly 6 is improved.

In another embodiment of the present solution, the chute assembly 6 comprises a first chute 61 and a second chute 62, i.e. one chute is provided on only one side of the frame 1, the first chute 61 being engaged with a first front roller 73 and a first rear roller 74, and the second chute 62 being engaged with a second front roller 75 and a second rear roller 76.

The locking assembly comprises a locating pin, a first locating hole, a second locating hole and a third locating hole.

Specifically, the first positioning hole is formed at the upper ends of the first sliding groove 61 and the second sliding groove 62, the upper ends of the first sliding groove 61 and the second sliding groove 62 are named as a first position, the second positioning hole is formed at the lower ends of the third sliding groove 63 and the fourth sliding groove 64, the lower ends of the third sliding groove 63 and the fourth sliding groove 64 are named as a second position, the third positioning hole is formed on the first sliding plate 71 and the second sliding plate 72, and the third positioning holes are formed on the first sliding plate 71 and the second sliding plate 72 and have the same forming positions. When the third positioning hole is matched with the first positioning hole, the positioning pin is inserted into the third positioning hole and the first positioning hole, the carriage assembly 7 is fixed at the first position, and when the third positioning hole is matched with the second positioning hole, the positioning pin is inserted into the third positioning hole and the second positioning hole, and the carriage assembly 7 is fixed at the second position.

To further optimize the solution described above, the axle further comprises a clamping assembly 8 which can be provided on the frame 1 for clamping the axle tube 5 at the upper end of the third runner 63, as shown in fig. 6, the clamping assembly 8 being provided near the first position and remote from the second position.

The clamping assembly 8 comprises an upper clamping block 81 and a lower clamping block 82, specifically, the upper clamping block 81 can be fixed on the frame 1, the lower clamping block 82 can also be fixed on the frame 1 and located at the lower end of the upper clamping block 81, and one end, close to the upper clamping block 81, of the lower clamping block 82 is an inclined surface.

When the first telescopic cylinder pulls the sliding frame assembly 7 to move upwards to the lower clamping block 82, the bridge pipe 5 moves upwards to a first position along the inclined surface of the lower clamping block 82, at the moment, the bridge pipe 5 is clamped between the upper clamping block 81 and the lower clamping block 82, the bridge is rigidly connected with the frame 1, and the damping assembly 9 cannot play a damping role;

the telescopic cylinder pushes the sliding frame assembly 7 to move downwards, the bridge pipe 5 moves downwards along the inclined surface of the lower clamping block 82, the clamping effect of the upper clamping block 81 and the lower clamping block 82 on the bridge pipe 5 is separated, the bridge and the frame 1 are elastically connected, and the damping assembly 9 plays a damping role.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (7)

1. A forklift truck, comprising:

a frame (1);

The lifting gantry comprises a lifting gantry body (2), wherein the lower end of the lifting gantry body (2) is connected with a frame (1) through a gantry rotating assembly (3), a traction assembly (4) capable of being connected with a motor vehicle is arranged at the upper end of the lifting gantry body (2), the gantry rotating assembly (3) comprises a mounting table (31) fixed on the frame (1), a second telescopic cylinder (32) and a rotating frame (33), a cylinder body of the second telescopic cylinder (32) is hinged with the frame (1), the rotating frame (33) is obliquely arranged relative to the lifting gantry body (2) and the oblique direction is consistent with the folding direction of the lifting gantry body (2), the upper end of the rotating frame (33) is fixedly connected with the lower end of the lifting gantry body (2), the lower end of the rotating frame (33) is hinged with a piston rod of the second telescopic cylinder (32), the lower end of the rotating frame (33) can be abutted with the frame (1), and the rotating frame (33) is hinged with the upper end of the side wall of the mounting table (31).

An axle mounted on a lower end face of the frame (1), the axle comprising:

-a bridge tube (5), the two ends of the bridge tube (5) being capable of mounting a tyre;

The sliding chute assemblies (6) are fixed on the frame (1), the number of the sliding chute assemblies (6) is two, the two sliding chute assemblies (6) are oppositely arranged on the frame (1), the two sliding chute assemblies (6) are arranged along the axial direction of the bridge pipe (5), and the inclined direction of the sliding chute assemblies (6) extends from the lower direction of the front end of the frame (1) to the upper direction of the rear end of the frame (1);

The sliding frame assembly (7), install on the sliding frame assembly (7) bridge pipe (5), the length extending direction of sliding frame assembly (7) is unanimous with the axis direction of bridge pipe (5), sliding frame assembly (7) is through first telescopic cylinder along sliding chute assembly (6), sliding frame assembly (7) are fixed on sliding chute assembly (6) through locking subassembly, sliding frame assembly (7) include first slide (71), second slide (72), first connecting plate (77) and second connecting plate (78), the both ends of the length direction of first slide (71) are provided with respectively with sliding chute assembly (6) complex first front roller (73) and first back roller (74), second slide (72) with first slide (71) are parallel, the both ends of the length direction of second slide (72) are provided with sliding chute assembly (6) complex second front roller (75) and second back roller (76), the length direction of first connecting plate (77) respectively with first connecting plate (71) and second connecting plate (78) are parallel, two ends of the second connecting plate (78) in the length direction are respectively and vertically connected with the lower ends of the middle parts of the first sliding plate (71) and the second sliding plate (72), and the second connecting plate (78) or the first connecting plate (77) is hinged with a piston rod of the first telescopic cylinder;

the chute assembly (6) comprises a first chute (61), a second chute (62), a third chute (63) and a fourth chute (64),

The first sliding groove (61) is matched with the first front roller (73), the second sliding groove (62) is opposite to the first sliding groove (61) and is arranged in parallel, the second sliding groove (62) is matched with the second front roller (75), the third sliding groove (63) is positioned below the first sliding groove (61), is parallel to the first sliding groove (61) and is positioned on the same side of the frame (1), the third sliding groove (63) is matched with the first rear roller (74), the fourth sliding groove (64) is positioned below the second sliding groove (62), is parallel to the second sliding groove (62) and is positioned on the same side of the frame (1), the fourth sliding groove (64) is matched with the second rear roller (76), and the inclination direction of the fourth sliding groove (64) extends from the lower front end of the frame (1) to the upper rear end of the frame (1) upwards;

The rotating frame (33) comprises a supporting rod (331), a first mounting plate (332) fixedly connected with the lower end of the lifting portal (2) and an L-shaped mounting plate (333), wherein the end part of the supporting rod (331) is hinged to a piston rod of the second telescopic cylinder (32), the first mounting plate (332) is parallel to the supporting rod (331), the L-shaped mounting plates (333) are multiple and uniformly distributed at two ends of the length direction of the first mounting plate (332), the L-shaped mounting plate (333) is perpendicular to the length extending direction of the first mounting plate (332), the L-shaped mounting plate (333) comprises a second mounting plate fixedly connected with the first mounting plate (332) and a third mounting plate obliquely arranged relative to the second mounting plate, the oblique direction of the third mounting plate is consistent with the folding direction of the lifting portal (2), one side, far away from the first mounting plate (332), of the second mounting plate is hinged to the upper end of the side wall of the mounting table (31), and the lower end of the third mounting plate is provided with a mounting hole (331) matched with the supporting rod.

2. Fork truck according to claim 1, characterized in that the number of second telescopic cylinders (32) is two and symmetrically distributed on both sides of the mounting table (31).

3. Fork lift truck according to claim 2, characterized in that said lifting mast (2) comprises:

the lower end of the rail (21) is fixedly connected with the upper end of the rotating frame (33), and the traction assembly (4) is arranged at the upper end of the rail (21);

The sliding frame (22) is slidably mounted on the track (21), the sliding frame (22) slides back and forth along the track (21) through a third telescopic cylinder, and rollers matched with the track (21) are arranged on the sliding frame (22);

The lifting arm (23), one end of the lifting arm (23) is hinged with the lower end of the sliding frame (22), the other end of the lifting arm (23) is pulled up and down through a fourth telescopic cylinder, and a pull rope for lifting goods is arranged on the lifting arm (23).

4. The forklift according to claim 1, characterized in that said traction assembly (4) comprises:

the hinged plate (41) is hinged with the upper end of the lifting portal (2) at one end of the hinged plate (41);

and one end of the hinge rod (42) is hinged with the other end of the hinge plate (41), and the other end of the hinge rod (42) is hinged with the motor vehicle.

5. Fork truck according to claim 1, characterized in that the axle further comprises two shock absorbing assemblies (9), the number of shock absorbing assemblies (9) is two, and the shock absorbing assemblies (9) are respectively arranged at two ends of the axle tube (5) in the axial direction, the shock absorbing assemblies (9) are hinged with the carriage assembly (7),

The shock absorbing assembly (9) comprises:

The mounting block (91), the mounting block (91) is provided with a mounting hole matched with the bridge pipe (5);

A shock absorber (93), wherein one end of the shock absorber (93) is hinged with the mounting block (91), and the other end of the shock absorber (93) is hinged with the carriage assembly (7);

the middle part of leaf spring (92) is fixed through U type bolt on installation piece (91), the length extending direction of leaf spring (92) is perpendicular to bridge pipe (5), the both ends of the length direction of leaf spring (92) with carriage assembly (7) are articulated.

6. The lift truck of claim 1, wherein the locking assembly comprises:

A positioning pin;

The first positioning holes are formed in the upper ends of the first sliding groove (61) and the second sliding groove (62);

the second positioning holes are formed at the lower ends of the third sliding groove (63) and the fourth sliding groove (64);

And a third positioning hole which is formed in the first sliding plate (71) and the second sliding plate (72) and can be matched with the first positioning hole and the second positioning hole, and the positioning pin can be inserted into the third positioning hole.

7. The forklift according to claim 6, further comprising a clamping assembly (8) provided on the frame (1) for clamping the axle tube (5) at the upper end of the third chute (63),

The clamping assembly (8) comprises:

An upper clamping block (81) fixed on the frame (1);

The lower clamping block (82) is fixed on the frame (1) and positioned at the lower end of the upper clamping block (81), and one end, close to the upper clamping block (81), of the lower clamping block (82) is an inclined surface.