CN210048452U

CN210048452U - Folding forklift

Info

Publication number: CN210048452U
Application number: CN201922202616.8U
Authority: CN
Inventors: 薄纯国; 王长柱; 薄宏斌; 商继全
Original assignee: Shandong Gongli Machinery Co Ltd
Current assignee: Shandong Gongli Machinery Co Ltd
Priority date: 2019-12-11
Filing date: 2019-12-11
Publication date: 2020-02-11
Anticipated expiration: 2029-12-11

Abstract

The utility model discloses a folding fork truck, including the base of installing truckle mechanism, install door shape grudging post and the handlebar in the base top, install fork elevating system and two forks on the door shape grudging post, fork and handlebar branch locate the front side and the rear side of door shape grudging post, the fork rotates to be connected fork elevating system can to in order to constitute the folding beta structure of door shape grudging post orientation, door shape grudging post lower extreme with the handlebar lower extreme all with the base rotates to be connected and can be to the folding beta structure of base orientation in order to constitute, folding fork truck be equipped with can with base, door shape grudging post, fork and handlebar are fixed in its user state relative position's stop gear. This fork truck is collapsible volume less structure when needs are accomodate and are transported, effectively reduces the required space of accomodating of fork truck, conveniently accomodates the transportation and carries the use along with the freight train.

Description

Folding forklift

Technical Field

The utility model belongs to the technical field of material handling device, concretely relates to folding fork truck.

Background

Fork truck is widely used material handling device, is mechanized loading and unloading, stack and the high-efficient equipment of short distance transportation, in the logistics transportation process, often need to be for customer's delivery or receipt. However, the customer often does not prepare fork truck, and artifical loading and unloading goods intensity of labour is very big and the operation is very inconvenient, and fork truck's the great storage space that needs of volume, so carry fork truck along with the freight train and will occupy a large amount of delivery space, influence goods transportation volume and conveying efficiency.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art, the to-be-solved technical problem of the utility model is to provide folding fork truck, this fork truck is collapsible volume less structure when needs are accomodate and are transported, effectively reduces the required storage space of fork truck, conveniently accomodates the transportation and carries the use along with the freight train.

In order to achieve the above object, the utility model discloses a technical scheme be:

the utility model provides a folding fork truck, is including the base of installing truckle mechanism, installs door shape grudging post and the handlebar in the base top, installs fork elevating system and two forks on the door shape grudging post, fork and handlebar branch locate the front side and the rear side of door shape grudging post, the fork rotates to be connected fork elevating system in order to constitute can to the folding beta structure of door shape grudging post orientation, door shape grudging post lower extreme with the handlebar lower extreme all with the base rotates to be connected and can be to the folding beta structure of base orientation in order to constitute, folding fork truck be equipped with can with base, door shape grudging post, fork and handlebar are fixed in its user state relative position's stop gear.

As preferred, folding fork truck be equipped with can with base, door-shaped grudging post, fork and handlebar are fixed in the supplementary stop gear of fold condition relative position, supplementary stop gear is including locating can be fixed in the fork between fork and fork elevating system and paste the first supplementary stop part who leans on position on fork elevating system, locate can fix the frame of door-shaped grudging post between door-shaped grudging post and base and paste the second supplementary stop part who leans on position on the base to and locate can fix the handlebar between handlebar and base and paste the third supplementary stop part who leans on position on door-shaped grudging post.

Preferably, the limiting mechanism comprises a first limiting part arranged between the fork and the fork lifting mechanism and capable of fixing the fork in a state of being vertical to the portal-shaped stand, a second limiting part arranged between the portal-shaped stand and the base and capable of fixing the portal-shaped stand in a state of being vertical to the base, and a third limiting part arranged between the handlebar and the base and capable of fixing the handlebar on the base.

Preferably, the fork lifting mechanism comprises a moving frame for mounting the fork and a height adjusting unit for adjusting and controlling the height position of the moving frame on the portal-shaped stand, the fork is hinged with the moving frame, the lower end part of the portal-shaped stand is hinged with the base, and the lower end part of the handlebar is hinged with the base.

Preferably, the first auxiliary limiting part comprises a U-shaped groove fixedly mounted on the moving frame and a first positioning pin mounted on the U-shaped groove, the U-shaped groove and the fork are arranged in a one-to-one correspondence manner, a notch of the U-shaped groove is arranged towards the fork, the length direction of the U-shaped groove is parallel to the central axis of the supporting leg of the portal stand, the fork is hinged to the lower end of the U-shaped groove, the fork is inserted into the U-shaped groove when being in a folded state, first pin holes matched with the first positioning pins are formed in two parallel side walls of the U-shaped groove, the two first pin holes are communicated with each other and are arranged close to the notch, and the first positioning pin is inserted into the two first pin holes to prevent the fork from being separated from the U-shaped groove; the first limiting part comprises a lower baffle fixedly installed at the lower end of the U-shaped groove, the lower baffle is perpendicular to the length direction of the U-shaped groove, and when the fork is in a use state perpendicular to the portal vertical frame, the bottom surface of the fork abuts against the lower baffle.

Preferably, the second limiting component comprises a second positioning pin and a second pin hole correspondingly formed in the lower end part of the door-shaped stand and the base, and when the door-shaped stand is in a use state of vertically standing on the base, the second pin holes formed in the base and the door-shaped stand are communicated and connected through the second positioning pin so as to fix the relative position of the door-shaped stand and the base; the second auxiliary limiting part comprises a third positioning pin and is correspondingly arranged in a third pin hole in the portal stand frame and the base, when the frame of the portal stand frame is in a folded state attached to the base, the frame of the portal stand frame is arranged in a state that the third pin hole in the base and the third pin hole in the portal stand frame are communicated and connected through the third positioning pin, and therefore the relative positions of the portal stand frame and the base are fixed.

Preferably, the third limiting part comprises a fourth positioning pin and a fourth pin hole correspondingly arranged at the lower end parts of the base and the handlebar, and when the handlebar stands on the base and is in a use state position, the fourth pin holes arranged on the base and the handlebar are communicated and connected through the fourth positioning pin so as to fix the relative positions of the handlebar and the base; the supplementary spacing block of third includes the fifth locating pin to and correspond and locate the fifth pinhole of base and handlebar lower tip works as the handlebar is in and pastes when leaning on the fold condition on the portal grudging post, locates the fifth pinhole on base and the handlebar is linked together and is connected through the fifth locating pin to the relative position of fixed handlebar and base.

Preferably, the handlebar comprises a handlebar rod and a handle arranged at the upper end of the handlebar rod, the base comprises a first horizontal supporting rod and a second horizontal supporting rod which are arranged perpendicular to the door-shaped stand, and the handlebar base is hinged with the rear end of the first horizontal supporting rod through a first rotating shaft; the two support legs of the door-shaped stand are respectively arranged on a first horizontal support bar and a second horizontal support bar, the first rotating shaft is arranged in parallel to the central axis of the support legs of the door-shaped stand, and the lower end part of the handle bar is arranged on the handle bar base; the caster wheel mechanism comprises two front caster wheels which are respectively arranged below the front portions of the first horizontal support rod and the second horizontal support rod, a rear caster wheel which is arranged below the rear end of the second horizontal support rod, and a rear double-wheel set which is arranged below the handlebar base, wherein the rear double-wheel set is an assembled double-wheel set which is coaxially arranged with the two caster wheels, a wheel shaft frame of the rear double-wheel set is arranged on the handlebar base, and when the forklift is in a use state, the two caster wheels of the rear double-wheel set are symmetrically arranged relative to a vertical plane where a central axis of the first horizontal support rod is located.

Preferably, a fourth limiting part is arranged between the handlebar base and the portal stand, and the fourth limiting part can fix the relative position of the handlebar base and the portal stand when the handlebar base rotates to a state that the rear double-wheel set is attached to the portal stand.

Preferably, the front caster and the rear caster are universal wheels, the wheel shaft frame of the rear double-wheel set is hinged with the handlebar base through a second rotating shaft to form a double-wheel type universal wheel assembly, the second rotating shaft is parallel to the first rotating shaft, and the handlebar is rotatably connected with the handlebar base so that the handlebar can rotate around the central axis of the handlebar.

Compared with the prior art, the utility model discloses an advantage lies in with positive effect: the utility model provides a folding fork truck, this fork truck is collapsible volume less structure when needs are accomodate and are transported, effectively reduces the required storage space of fork truck, conveniently accomodates the transportation and carries the use along with the freight train.

Drawings

FIG. 1 is a first schematic structural view of a folding forklift in a use state according to an embodiment;

FIG. 2 is a second schematic structural view of the folding forklift in use according to the embodiment;

FIG. 3 is a schematic view of the folding forklift of the embodiment in a folded state;

FIG. 4 is a bottom view of the folded state of the folding forklift of the embodiment;

in the above figure: 1-base, 11-first horizontal stay, 12-second horizontal stay, 13-first rotating shaft, 14-handlebar base, 2-portal stand, 21-fork lifting mechanism, 211-moving frame, 212-height adjusting unit, 22-supporting leg, 3-handlebar, 31-handlebar, 32-handle, 4-fork, 5-first auxiliary limiting part, 51-U-shaped groove, 52-first positioning pin, 53-first pin hole, 6-lower baffle, 7-second positioning pin, 8-caster mechanism, 81-front caster, 82-rear caster, 83-rear double-wheel set, 831-wheel shaft bracket, 832-second rotating shaft.

Detailed Description

The present invention is specifically described below by way of exemplary embodiments. It should be understood, however, that elements, structures and features of one embodiment may be beneficially incorporated in other embodiments without further recitation.

It should be noted that in the description of the present invention, the terms "inside", "outside", "upper", "lower", "left", "right", "front", "rear", etc. indicate the positional relationship based on the drawings, and are only for convenience of description and simplification of description, but 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 thus should not be construed as limiting the present invention.

The terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature.

As shown in fig. 1 to 4, a folding forklift includes a base 1 provided with a caster mechanism 8, a portal vertical frame 2 and a handlebar 3 mounted above the base 1, a fork lifting mechanism 21 and two forks 4 mounted on the portal vertical frame 2, the forks 4 and the handlebar 3 are respectively disposed on the front side and the rear side of the portal vertical frame 2, the forks 4 are rotatably connected to the fork lifting mechanism 21 to form a folding structure capable of being folded in the direction of the portal vertical frame 2, the lower end of the portal vertical frame 2 and the lower end of the handlebar 3 are both rotatably connected to the base 1 to form a folding structure capable of being folded in the direction of the base 1, and the folding forklift is provided with a limiting mechanism capable of fixing the base 1, the portal vertical frame 2, the forks 4 and the handlebar 3 at the relative positions in the use state.

The base 1, the portal vertical frame 2, the fork 4 and the handle 3 of the folding forklift can be fixed at the relative positions of the use state of a conventional forklift through the limiting mechanism, so that the forklift is in the use state shown in figures 1 and 2, the normal use of the forklift in carrying goods is guaranteed, when the forklift needs to be stored and transported, the limitation of the limiting mechanism on each part of the forklift is removed, the fork 4 is turned to the portal vertical frame 2, the fork 4 is folded to be attached to the fork lifting mechanism 21, the portal vertical frame 2 is rotated to the base 1 at the front side until the portal vertical frame 2 is attached to the base 1, finally the handle 3 is rotated to the base 1 at the front side until the handle 3 is attached to the portal vertical frame 2, the folding of the forklift can be completed, and the forklift is in the folding state shown in figures 3 and 4. Compare with folding preceding, the fork truck that is in the state of accomodating only needs a less cuboid space to accomodate, is far less than the required spatial position who occupies of the user state before its folding, consequently, this fork truck is collapsible volume less structure when needs are accomodate and are transported, effectively reduces the required space of accomodating of fork truck, conveniently accomodates the transportation and carry the use along with the freight train.

Specifically, folding fork truck is equipped with can with base 1, door-shaped grudging post 2, fork 4 and handlebar 3 are fixed in the supplementary stop gear of fold condition relative position, supplementary stop gear is including locating can be fixed in fork 4 between fork 4 and fork elevating system 21 and paste the first supplementary stop part 5 of leaning on the position on fork elevating system 21 with fork 4, locate can fix the frame of door-shaped grudging post 2 between door-shaped grudging post 2 and base 1 and paste the supplementary stop part of second of leaning on the position on base 1, and locate can fix handlebar 3 between handlebar 3 and base 1 and paste the supplementary stop part of third of leaning on the position on door-shaped grudging post 2. The auxiliary limiting mechanism can fix the relative positions of the parts when the forklift is in a folded state, so that the forklift can be conveniently carried in the folded state.

Specifically, stop gear is including locating can fix fork 4 at the first stop part of perpendicular to door shape grudging post 2 position between fork 4 and fork elevating system 21, locate can fix door shape grudging post 2 at the second stop part of perpendicular to base 1 position between door shape grudging post 2 and base 1, and locate can fix the fixed third stop part of standing on base 1 of handlebar between handlebar 3 and base 1, promptly the third stop part can be fixed in its position of use on base 1 with handlebar 3.

Specifically, fork elevating system 21 is including the removal frame 211 that is used for installing the fork, and regulation and control remove the height control unit 212 of frame 211 height position on door shape grudging post 2, fork 4 one end is articulated remove frame 211, the end is articulated under door shape grudging post 2 the base 1, the end is articulated under handlebar 3 the base 1.

Specifically, the height adjusting unit 212 may adopt a fork height adjusting structure of any existing forklift.

Specifically, first supplementary stop part 5 includes fixed mounting and is in remove U type groove 51 on the frame 211 and install first locating pin 52 on the U type groove 51, U type groove 51 with fork 4 one-to-one sets up, the notch of U type groove 51 sets up towards fork 4, just U type groove 51 length direction is on a parallel with the supporting leg 22 axis setting of door shape grudging post 2, fork 4 is articulated U type groove 51 tip, fork 4 inserts when being in fold condition and locates in U type groove 51, two parallel lateral walls of U type groove 51 all seted up with first pinhole 53 of first locating pin 52 adaptation, two first pinhole 53 communicate each other and be close to the notch setting, first locating pin 52 is inserted and is located in two first pinholes 53 with the prevention fork 4 deviates from U type groove 51. Adopt above-mentioned first supplementary stop part 5 can restrict the fork 4 of fold condition in U type groove 51, realize the rigidity to fold condition fork 4, when needs use fork truck transportation goods, only need extract first locating pin 52 from first pinhole 53 can remove first supplementary stop part 5 to the restriction of fork 4, the fold condition and the user state dress of realization fork that can be convenient change. Besides the above structure, the first auxiliary limit part 5 can also adopt other limit structures capable of releasing the limit state to realize the position fixing of the fork 4.

Specifically, the first limiting part comprises a lower baffle 6 fixedly installed at the lower end of the U-shaped groove 51, the lower baffle 6 is perpendicular to the length direction of the U-shaped groove 51, and when the fork 4 is in a use state perpendicular to the portal vertical frame 2, the bottom surface of the fork 4 abuts against the lower baffle 6. By adopting the structure, the lower baffle 6 can limit the pallet fork 4 hinged with the U-shaped groove 51 to the position vertical to the portal vertical frame 2, namely the position of the pallet fork 4 in the use state, and besides the structure, the first limiting part can also adopt other limiting structures which can remove the limiting state such as a positioning pin, a pin hole and the like to realize the position fixation of the pallet fork 4.

Specifically, the second limiting component comprises a second positioning pin 7 and a second pin hole correspondingly formed in the lower end of the door-shaped stand 2 and the base 1, and when the door-shaped stand 2 is in a use state of vertically standing on the base 1, the second pin hole formed in the base 1 and the second pin hole formed in the door-shaped stand 2 are communicated and connected through the second positioning pin 7, so that the relative position of the door-shaped stand 2 and the base 1 is fixed.

Specifically, the supplementary spacing part of second includes the third locating pin to and correspond set up in third pinhole on door shape grudging post 2 frame and the base 1, when the frame of door shape grudging post 2 is in the fold condition of pasting on base 1, locate third pinhole on base 1 and the door shape grudging post 2 is linked together and connects through the third locating pin to fixed door shape grudging post 2 and base 1's relative position.

Specifically, the third limiting part includes a fourth positioning pin and is correspondingly arranged in a fourth pin hole at the lower end of the base 1 and the handlebar 3, and when the handlebar 3 stands on the base 1 and is in a use state position, the fourth pin hole arranged on the base 1 and the handlebar 3 is communicated and connected through the fourth positioning pin so as to fix the relative position of the handlebar 3 and the base 1.

Specifically, supplementary spacing block of third includes the fifth locating pin, and corresponds and locates the fifth pinhole of

base

1 and 3 tip under the handlebar, work as handlebar 1 is in and pastes to paste when leaning on the fold condition on portal frame 2, locates the fifth pinhole on base 1 and the handlebar 3 is linked together and is connected through the fifth locating pin to fixed handlebar 3 and base 1's relative position.

Specifically, the second limiting part, the second auxiliary limiting part, the third limiting part and the third auxiliary limiting part can adopt other conventional limiting structures which can release the limiting state besides the structure of matching the positioning pin and the pin hole.

Specifically, the handlebar 3 comprises a handle bar 31 and a handle 32 mounted at the upper end of the handle bar 31, and the base 1 comprises a first horizontal stay 11 and a second horizontal stay 12 arranged perpendicular to the portal frame 2, and a handlebar base 14 hinged to the rear end of the first horizontal stay 11 through a first rotating shaft 13; the two supporting legs 22 of the portal stand 2 are respectively arranged on a first horizontal stay bar 11 and a second horizontal stay bar 12, the first rotating shaft 13 is arranged in parallel to the central axis of the supporting legs 22 of the portal stand 2, and the lower end part of the handle bar 31 is arranged on the handle bar base 14; the caster mechanism 8 includes two front casters 81 respectively installed below the front portions of the first horizontal supporting rod 11 and the second horizontal supporting rod 12, a rear caster 82 installed below the rear end of the second horizontal supporting rod 11, and a rear dual-wheel set 83 installed below the handlebar base 14, where the rear dual-wheel set 83 is an assembled dual-wheel set in which two casters are coaxially arranged, a wheel axle frame 831 of the rear dual-wheel set 83 is installed on the handlebar base 14, and when the forklift is in a use state, the two casters of the rear dual-wheel set 83 are symmetrically arranged with respect to a vertical plane where a central axis of the first horizontal supporting rod 11 is located. Compared with the installation of a single rear caster, the arrangement of the rear double wheel set 83 can more stably support the handlebar base 14, so that the forklift is more stably pushed by the handlebar 2, meanwhile, the handlebar base 14 is stably supported by the rear double-wheel set 83, and can be used for installing driving and controlling equipment such as a driving power supply of the height adjusting unit 212 and the like, but the rear twin-wheel set 83 when the truck is in use will have one rear caster projecting beyond the reach of the truck base, the storage space of the forklift needs to be increased after the folding, the structure sets the handle bar base 14 and the first horizontal stay bar 11 as a rotating connection structure, when folding fork truck, can be close to door shape grudging post 2 position (as shown in fig. 3 and fig. 4) with handlebar base 14 commentaries on classics back double round group 83, reduce the back double round group 83 protrusion fork truck base scope of fold condition to the volume of folding fork truck is folded in the better reduction, more convenient accomodating.

Specifically, a fourth limiting component is arranged between the handlebar base 14 and the portal stand 2, and the fourth limiting component can fix the relative position of the handlebar base 14 and the portal stand 2 when the handlebar base 14 rotates to a state that the rear double-wheel set 83 is attached to the portal stand 2. The fold condition of handlebar base 14 can be fixed in the setting of fourth spacing part, the fork truck transport after convenient folding more. The fourth limiting component can adopt any limiting structure which can release the limiting state, such as the matching of a positioning pin and a pin hole, and the like, to realize the position fixing of the handlebar base 14.

Specifically, the front caster 81 and the rear caster 82 are both universal wheels, the wheel axle frame 831 of the rear dual-wheel set 83 is hinged to the handlebar base 14 through the second rotating shaft 832 to form a dual-wheel type universal wheel assembly, the second rotating shaft 832 is parallel to the first rotating shaft 13, and the handlebar 31 is rotatably connected to the handlebar base 14, so that the handlebar 31 can rotate around the central axis of the handlebar 31. Adopt universal wheel and double round formula universal wheel subassembly to turn to in a flexible way as truckle mechanism 8 can make fork truck can make things convenient for fork truck to use more when the user state, simultaneously, the wheel pedestal 831 of barre 31 and back double round group 83 rotates and connects base 14, also can adjust back double round group 83 and handlebar 3 angular position in a flexible way when folding fork truck, the better volume that reduces fork truck fold condition.

Specifically, the handle bar 31 may be connected to the handle bar base 14 in any rotational connection manner that allows the handle bar 31 to rotate around its central axis, for example, the lower end of the handle bar 31 is connected to the handle bar base 14 through a bearing.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in other forms, and any person skilled in the art may use the above-mentioned technical contents to change or modify the equivalent embodiment into equivalent changes and apply to other fields, but any simple modification, equivalent change and modification made to the above embodiments according to the technical matters of the present invention will still fall within the protection scope of the technical solution of the present invention.

Claims

1. The utility model provides a folding fork truck, is including the base of installing truckle mechanism, installs door shape grudging post and the handlebar in the base top, installs fork elevating system and two forks on the door shape grudging post, the front side and the rear side of door shape grudging post are located to fork and handlebar branch, a serial communication port, the fork rotates to be connected fork elevating system in order to constitute can to the folding beta structure of door shape grudging post orientation, door shape grudging post lower extreme with the handlebar lower extreme all with the base rotates to be connected and can be to the folding beta structure of base orientation in order to constitute, folding fork truck is equipped with can with base, door shape grudging post, fork and handlebar are fixed in its user state relative position's stop gear.

2. The foldable forklift of claim 1, wherein the foldable forklift is provided with an auxiliary limiting mechanism for fixing the base, the door-shaped stand, the fork and the handle at opposite positions in a folded state, the auxiliary limiting mechanism comprises a first auxiliary limiting member disposed between the fork and the fork lifting mechanism for fixing the fork at a position to be attached to the fork lifting mechanism, a second auxiliary limiting member disposed between the door-shaped stand and the base for fixing the frame of the door-shaped stand at a position to be attached to the base, and a third auxiliary limiting member disposed between the handle and the base for fixing the handle at a position to be attached to the door-shaped stand.

3. The foldable lift truck of claim 2, wherein the stop mechanism includes a first stop member disposed between the fork and the fork lift mechanism for securing the fork in a position perpendicular to the door-shaped stand, a second stop member disposed between the door-shaped stand and the base for securing the door-shaped stand in a position perpendicular to the base, and a third stop member disposed between the handle and the base for securing the handle to the base.

4. The folding forklift of claim 3, wherein said fork lift mechanism includes a moving frame for mounting a fork, said fork being hinged to said moving frame, a lower end portion of said portal frame being hinged to said base, and a lower end portion of said handle being hinged to said base, and a height adjustment unit for adjusting a height position of said moving frame on said portal frame.

5. The folding forklift as recited in claim 4, wherein the first auxiliary limiting component comprises a U-shaped groove fixedly mounted on the moving frame and first positioning pins mounted on the U-shaped groove, the U-shaped groove and the forks are arranged in a one-to-one correspondence, notches of the U-shaped groove are arranged toward the forks, the length direction of the U-shaped groove is parallel to the central axes of the support legs of the portal stand frame, the forks are hinged to the lower end portions of the U-shaped groove, the forks are inserted into the U-shaped groove when being folded, first pin holes matched with the first positioning pins are formed in two parallel side walls of the U-shaped groove, the two first pin holes are communicated with each other and arranged close to the notches, and the first positioning pins are inserted into the two first pin holes to prevent the forks from falling out of the U-shaped groove; the first limiting part comprises a lower baffle fixedly installed at the lower end of the U-shaped groove, the lower baffle is perpendicular to the length direction of the U-shaped groove, and when the fork is in a use state perpendicular to the portal vertical frame, the bottom surface of the fork abuts against the lower baffle.

6. The folding forklift of claim 3, wherein the second limiting member comprises a second positioning pin and a second pin hole correspondingly formed in the lower end portion of the door-shaped stand and the base, and when the door-shaped stand is in a use state vertically standing on the base, the second pin hole formed in the base and the door-shaped stand are communicated and connected through the second positioning pin to fix the relative positions of the door-shaped stand and the base; the second auxiliary limiting part comprises a third positioning pin and is correspondingly arranged in a third pin hole in the portal stand frame and the base, when the frame of the portal stand frame is in a folded state attached to the base, the frame of the portal stand frame is arranged in a state that the third pin hole in the base and the third pin hole in the portal stand frame are communicated and connected through the third positioning pin, and therefore the relative positions of the portal stand frame and the base are fixed.

7. The foldable forklift of claim 3, wherein the third limiting member comprises a fourth positioning pin and a fourth pin hole correspondingly formed in the lower end portions of the base and the handle bar, and when the handle bar stands on the base in the use state position, the fourth pin holes formed in the base and the handle bar are communicated and connected through the fourth positioning pin to fix the relative positions of the handle bar and the base; the supplementary spacing block of third includes the fifth locating pin to and correspond and locate the fifth pinhole of base and handlebar lower tip works as the handlebar is in and pastes when leaning on the fold condition on the portal grudging post, locates the fifth pinhole on base and the handlebar is linked together and is connected through the fifth locating pin to the relative position of fixed handlebar and base.

8. The folding forklift truck of claim 1, wherein said handlebar comprises a handlebar stem and a handle mounted at an upper end of the handlebar stem, and said base comprises a first horizontal strut and a second horizontal strut disposed perpendicular to the portal frame, and a handlebar base hinged to a rear end of said first horizontal strut by a first pivot; the two support legs of the door-shaped stand are respectively arranged on a first horizontal support bar and a second horizontal support bar, the first rotating shaft is arranged in parallel to the central axis of the support legs of the door-shaped stand, and the lower end part of the handle bar is arranged on the handle bar base; the caster wheel mechanism comprises two front caster wheels which are respectively arranged below the front portions of the first horizontal support rod and the second horizontal support rod, a rear caster wheel which is arranged below the rear end of the second horizontal support rod, and a rear double-wheel set which is arranged below the handlebar base, wherein the rear double-wheel set is an assembled double-wheel set which is coaxially arranged with the two caster wheels, a wheel shaft frame of the rear double-wheel set is arranged on the handlebar base, and when the forklift is in a use state, the two caster wheels of the rear double-wheel set are symmetrically arranged relative to a vertical plane where a central axis of the first horizontal support rod is located.

9. The foldable forklift of claim 8, wherein a fourth limiting member is disposed between the handlebar base and the portal stand, the fourth limiting member being capable of fixing the relative positions of the handlebar base and the portal stand when the handlebar base is rotated to a state where the rear double wheel set abuts against the portal stand.

10. The foldable forklift of claim 8, wherein the front caster and the rear caster are universal wheels, the axle frame of the rear dual-wheel set is hinged to the handlebar base by a second rotating shaft to form a dual-wheel type universal wheel assembly, the second rotating shaft is arranged in parallel with the first rotating shaft, and the handle bar is rotatably connected to the handlebar base so that the handle bar can rotate around the central axis of the handle bar.