CN215439518U

CN215439518U - Electric forklift with lifting and walking stability

Info

Publication number: CN215439518U
Application number: CN202121555724.4U
Authority: CN
Inventors: 史建刚; 王静
Original assignee: Zhijie Intelligent Technology Xianghe Co ltd
Current assignee: Beijing Jigong Technology Co ltd
Priority date: 2021-07-09
Filing date: 2021-07-09
Publication date: 2022-01-07
Anticipated expiration: 2031-07-09

Abstract

The utility model provides an electric forklift with stable lifting and walking, belongs to the technical field of electric forklifts, and is used for solving the problems that an existing forklift is easy to shake, is not labor-saving in steering, and is unstable in gravity center when walking is raised. The counterweight car comprises a counterweight car body, a crane boom, a crane oil cylinder, a balance connecting rod and a fork frame, wherein a driving wheel set is arranged on the front side of the counterweight car body, a vertical frame is fixed at the upper end of the counterweight car body, two ends of the crane boom and two ends of the balance connecting rod are respectively and rotatably connected to the vertical frame and the fork frame, a base of the crane oil cylinder is hinged to a car frame, an extending end of the crane oil cylinder is hinged to the crane boom, a steering shaft penetrating through a counterweight box is rotatably arranged in the counterweight box, a power-assisted steering mechanism is arranged at the upper end of the steering shaft, a steering wheel set is arranged at the lower end of the counterweight box, two bilaterally symmetrical buffering anti-shaking devices are arranged among the counterweight car body, the vertical frame and the steering wheel set, and two symmetrical supporting mechanisms are arranged above the counterweight car body; the utility model saves labor in steering, can effectively reduce shaking, and has stable gravity center during walking and steering.

Description

Electric forklift with lifting and walking stability

Technical Field

The utility model belongs to the technical field of electric forklifts, and relates to an electric forklift with stable lifting and walking.

Background

The electric forklift is a forklift that operates electrically, and most of them operate as a battery. The accumulator is one of the batteries, and the accumulator can store limited electric energy and be used in a proper place. The working principle of the device is to convert chemical energy into electric energy.

The electric forklift is a dual-purpose vehicle for lifting, loading, unloading and short-distance transportation, and fuel oil is not used. The device is particularly suitable for loading, unloading and transporting articles in various workshops, warehouses, goods yards and the like. The electric forklift has the characteristics of balanced lifting, flexible rotation, convenient operation and the like, and is widely used in the production field.

And to small-size mill transport goods, the cost of using on-vehicle type fork truck is higher to under the less condition in place, be not convenient for remove, certain incident can cause even in addition, at this moment, small-size promotion fork truck can laminate actual transport demand more.

However, when the existing small-sized pushing forklift is used and the loaded object reaches a certain weight, the gravity center is unstable during hoisting and transportation, and the steering is very laborious.

Based on this, we provide a stable electric fork truck of jack-up walking, can effectively support the fork truck main part, guarantee the walking and turn to and jack-up when lifting the focus stable, turn to laborsaving simultaneously, convenient stable satisfies the long-time use of user.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems in the prior art, provides an electric forklift with stable lifting and walking, and aims to solve the technical problems that: how to realize that fork truck easily laborsaving turns to the operation to effectively guarantee walking and turn to the focus of in-process stable.

The purpose of the utility model can be realized by the following technical scheme:

an electric forklift with stable lifting and walking comprises a counterweight body, a crane boom, a lifting oil cylinder, a balance connecting rod and a fork frame, the front side of the counterweight vehicle body is provided with a driving wheel set, the upper end of the counterweight vehicle body is fixed with a vertical frame, the two ends of a cargo boom and the two ends of a balance connecting rod are respectively and rotatably connected on the vertical frame and a fork frame, the balance connecting rod is positioned below the cargo boom, the base of a lifting oil cylinder is hinged on the vehicle frame, the extending end of the lifting oil cylinder passes through the balance connecting rod, and the extension end of the lifting oil cylinder is hinged on the crane boom, a weight box is fixed at the rear side of the vertical frame, a steering shaft penetrating through the weight box is rotatably arranged in the weight box, a power-assisted steering mechanism is arranged at the upper end of the steering shaft, a steering wheel set is arranged at the lower end of the weight box, the steering shaft is in transmission connection with the steering wheel set, two buffer anti-shaking devices which are bilaterally symmetrical are arranged among the weight vehicle body, the vertical frame and the steering wheel set, and two symmetrical supporting mechanisms are arranged above the weight vehicle body.

The left and right sides of the counterweight vehicle body are all provided with a storage battery box, a plurality of counterweight plates are arranged inside the counterweight vehicle body and the counterweight box, a vertical plate is fixed on the rear side of the counterweight box, and a lifting rotary seat is detachably arranged above the vertical plate.

Structure more than adopting, the accumulator case provides the electric energy for each electric element, and the cooperation of counter weight automobile body and weight box is guaranteed to go up and down stably, and the articulated slab is used for installing buffering anti-shake ware, and the user can stand in the top of riser, also can sit at lifting swivel seat, and lifting swivel seat can go up and down, satisfies the user use of different sizes.

The power-assisted steering mechanism includes the bogie, the helping hand motor, mounting panel and U template, the U template is fixed in the weight box upper end, the helping hand motor is fixed on the U template, the steering spindle is fixed inside the rotation hole of helping hand motor, the mounting panel is fixed on the steering spindle, and the mounting panel is located the helping hand motor top, be fixed with the travel switch of two symmetries on the mounting panel, the bogie rotates and sets up on the steering spindle, and the bogie is located between two travel switch, the bogie upper end is equipped with the control steering wheel, be equipped with display screen and a plurality of control button on the control steering wheel, the control steering wheel respectively with travel switch, the helping hand motor, the jack-up cylinder, drive wheelset and electric storage box electric connection.

Structure more than adopting, display screen and a plurality of control button cooperation, the name specification quantity of record transport goods product, form effective data, control steering wheel control drive wheelset is advanced and is retreated, control jack-up cylinder is flexible, thereby control the crotch and go up and down, the rotation control steering wheel, thereby drive the bogie and revolve the steering spindle and rotate, the bogie promotes the travel switch of this side, travel switch sends control signal back control steering wheel, control steering wheel control helping hand motor rotates to this direction, thereby drive the steering spindle and rotate, be used for power assisted steering.

The steering wheel group includes first connecting rod, second connecting rod and installation pole, and the installation pole is fixed in the weight box below, and the both ends of installation pole are rotated and are equipped with the synchronizing frame of symmetry, and the outside of synchronizing frame all is equipped with the directive wheel, and it has the synchronizing bar to articulate between two synchronizing frames, and the one end of first connecting rod is fixed at the steering spindle lower extreme, and the one end of second connecting rod is articulated with the other end of first connecting rod, and the other end of second connecting rod is articulated with one of them synchronizing frame.

By adopting the structure, the steering shaft rotates to drive the first connecting rod to rotate around the steering shaft, the first connecting rod pulls or pushes the second connecting rod, the second connecting rod pulls or pushes one of the synchronous frames to rotate, the synchronous frame drives the other synchronous frame to rotate synchronously through the synchronous rod, and the two synchronous frames respectively drive the steering wheel to rotate synchronously, so that left turning or right turning is completed.

The utility model discloses a counter weight car body, including counter weight car body, the supporting mechanism includes rotating electrical machines and locking screw, rotating electrical machines fixes in counter weight car body upper end, and rotating electrical machines is located the one side of being close to the driving wheel group, be fixed with the rotation arm on rotating electrical machines's the output shaft, the inside slip of swinging boom is equipped with flexible arm, the tip of flexible arm is rotated and is equipped with the support cylinder, the lower extreme of support cylinder rotates and is equipped with the mounting bracket, the both sides of mounting bracket are rotated respectively and are equipped with two athey wheels, be equipped with the track on two athey wheels of homonymy, the locking screw spiro union is at the tip of swinging boom, the lower extreme of locking screw is contradicted on flexible arm, rotating electrical machines and support cylinder all with control direction dish electric connection.

Structure more than adopting, the track is unsettled state, when the heavier article of transportation or will carry article higher department, the focus is not stable enough this moment, then outwards rotate through control steering wheel control rotating electrical machines, it outwards opens to drive the swinging boom, open the position back that is fit for, stretch out through control steering wheel control support cylinder, drive mounting bracket downwardly movement, the track is contradicted subaerial, support cylinder can rotate with flexible arm and mounting bracket relatively, the rotational freedom of track has been guaranteed, the track can walk and turn to along with the removal of this device this moment, guarantee that the focus is stable, when carrying heavier article, can pull out flexible arm, pull out the back, rotatory locking screw, locking screw's lower extreme is contradicted on flexible arm, with flexible arm locking, guarantee more stable removal transport.

Compared with the prior art, this stable electric fork-lift of jack-up walking has following advantage:

the counterweight vehicle body is matched with the supporting mechanism, so that the device is effectively supported, the gravity center is stable, meanwhile, the supporting oil cylinder can rotate relative to the telescopic arm and the mounting frame, and the supporting mechanism can walk and turn along with the movement of the device, so that the gravity center stability during walking is met; the power-assisted steering mechanism, the steering shaft, the weight box and the steering wheel set are matched, so that the power-assisted steering mechanism is labor-saving in steering, convenient and stable to use and capable of being used for a long time; the buffer anti-shake device is connected with the counterweight vehicle body, the vertical frame and the steering wheel set, so that the vibration in the walking and steering processes is effectively reduced, and the walking and steering stability is ensured; through riser and lifting and drop rotating seat cooperation, satisfy synchronous movement and sit the demand of operation, the user is more laborsaving.

Drawings

FIG. 1 is a schematic rear perspective view of the present invention;

FIG. 2 is a schematic front side three-dimensional structure of the present invention;

FIG. 3 is a front side perspective view of a portion of the components of the present invention;

FIG. 4 is a rear perspective view of a portion of the components of the present invention;

FIG. 5 is a perspective view of the support mechanism of the present invention;

in the figure: 1-counterweight vehicle body, 2-steering wheel group, 2 a-first connecting rod, 2 b-second connecting rod, 2 c-mounting rod, 2 d-synchronizing rod, 2 e-synchronizing frame, 2 f-steering wheel, 3-vertical plate, 4-lifting rotating seat, 5-counterweight box, 6-buffer anti-shaking device, 7-power steering mechanism, 7 a-control steering wheel, 7 b-steering frame, 7 c-travel switch, 7 d-power motor, 7 e-mounting plate, 7 f-U-shaped plate, 7 g-display screen, 8-vertical frame, 9-cargo boom, 10-fork frame, 11-driving wheel group, 12-electricity storage box, 13-balancing connecting rod, 14-cargo cylinder, 15-steering shaft, 16-supporting mechanism, 16 a-telescopic arm, 16 b-supporting oil cylinder, 16 c-rotating arm, 16 d-rotating motor, 16 e-mounting rack, 16 f-crawler wheel, 16 g-crawler and 16 h-locking screw.

Detailed Description

The technical solution of the present patent will be described in further detail with reference to the following embodiments.

Reference will now be made in detail to embodiments of the present patent, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present patent and are not to be construed as limiting the present patent.

In the description of this patent, it is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the convenience of describing the patent and for the simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent.

In the description of this patent, it is noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can include, for example, fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.

Referring to fig. 1-5, the embodiment provides an electric forklift with stable lifting and walking, comprising a counterweight body 1, a boom 9, a lifting cylinder 14, a balance link 13 and a fork frame 10, wherein a driving wheel set 11 is arranged on the front side of the counterweight body 1, a vertical frame 8 is fixed on the upper end of the counterweight body 1, two ends of the boom 9 and two ends of the balance link 13 are respectively rotatably connected to the vertical frame 8 and the fork frame 10, the balance link 13 is positioned below the boom 9, the base of the lifting cylinder 14 is hinged to the frame 1, the extending end of the lifting cylinder 14 passes through the balance link 13, the extending end of the lifting cylinder 14 is hinged to the boom 9, a counterweight box 5 is fixed on the rear side of the vertical frame 8, a steering shaft 15 passing through the counterweight box 5 is rotatably arranged inside the counterweight box 5, a power-assisted steering mechanism 7 is arranged on the upper end of the steering shaft 15, a steering wheel set 2 is arranged on the lower end of the counterweight box 5, the steering shaft 15 is in transmission connection with the steering wheel set 2, two bilaterally symmetrical buffering anti-shaking devices 6 are arranged among the counterweight vehicle body 1, the vertical frame 8 and the steering wheel set 2, and two symmetrical supporting mechanisms 16 are arranged above the counterweight vehicle body 1.

The left side and the right side of the counterweight vehicle body 1 are both provided with a storage battery box 12, a plurality of counterweight plates are arranged inside the counterweight vehicle body 1 and the counterweight box 5, a vertical plate 3 is fixed at the rear side of the counterweight box 5, and a lifting rotary seat 4 is detachably arranged above the vertical plate 3; the accumulator box 12 provides electric energy for each electric element, and the cooperation of counter weight automobile body 1 and weight box 5 is guaranteed to go up and down stably, and articulated slab 1a is used for installing buffering anti-shake ware 6, and the user can stand in the top of riser 3, also can sit lifting swivel seat 4, and lifting swivel seat 4 can go up and down, satisfies the user use of different sizes.

The power-assisted steering mechanism 7 comprises a steering frame 7b, a power-assisted motor 7d, a mounting plate 7e and a U-shaped plate 7f, the U-shaped plate 7f is fixed at the upper end of the weight box 5, the power-assisted motor 7d is fixed on the U-shaped plate 7f, a steering shaft 15 is fixed in a rotating hole of the power-assisted motor 7d, the mounting plate 7e is fixed on the steering shaft 15, the mounting plate 7e is positioned above the power-assisted motor 7d, two symmetrical travel switches 7c are fixed on the mounting plate 7e, the bogie 7b is rotationally arranged on the steering shaft 15, the bogie 7b is positioned between the two travel switches 7c, the upper end of the bogie 7b is provided with a control steering wheel 7a, the control steering wheel 7a is provided with a display screen 7g and a plurality of control buttons, and the control steering wheel 7a is respectively and electrically connected with the travel switches 7c, the power-assisted motor 7d, the lifting oil cylinder 14, the driving wheel set 11 and the storage battery box 12; the display screen 7g is matched with a plurality of control buttons to record the name, specification and quantity of goods carrying products, effective data is formed, the control steering wheel 7a controls the driving wheel set 11 to move forwards and backwards, the control lifting oil cylinder 14 to stretch and retract, the control fork frame 10 to lift and rotate, the control steering wheel 7a is rotated, the steering frame 7b is driven to rotate around the steering shaft 15, the steering frame 7b pushes the travel switch 7c on the side, the travel switch 7c sends a control signal back to the control steering wheel 7a, and the control steering wheel 7a controls the power-assisted motor 7d to rotate in the direction, so that the steering shaft 15 is driven to rotate and is used for power-assisted steering.

The steering wheel set 2 comprises a first connecting rod 2a, a second connecting rod 2b and a mounting rod 2c, the mounting rod 2c is fixed below the weight box 5, two ends of the mounting rod 2c are rotatably provided with symmetrical synchronizing frames 2e, the outer sides of the synchronizing frames 2e are respectively provided with a steering wheel 2f, a synchronizing rod 2d is hinged between the two synchronizing frames 2e, one end of the first connecting rod 2a is fixed at the lower end of a steering shaft 15, one end of the second connecting rod 2b is hinged with the other end of the first connecting rod 2a, and the other end of the second connecting rod 2b is hinged with one of the synchronizing frames 2 e; the steering shaft 15 rotates to drive the first connecting rod 2a to rotate around the steering shaft 15, the first connecting rod 2a pulls or pushes the second connecting rod 2b, the second connecting rod 2b pulls or pushes one of the synchronizers 2e to rotate, the synchronizers 2e drive the other synchronizers 2e to synchronously rotate through the synchronizing rods 2d, the two synchronizers 2e respectively drive the steering wheels 2f to synchronously rotate, and therefore left-turning or right-turning is completed.

The supporting mechanism 16 comprises a rotating motor 16d and a locking screw 16h, the rotating motor 16d is fixed at the upper end of the counterweight vehicle body 1, the rotating motor 16d is located at one side close to the driving wheel set 11, a rotating arm 16c is fixed on an output shaft of the rotating motor 16d, a telescopic arm 16a is arranged inside the rotating arm 16c in a sliding mode, a supporting oil cylinder 16b is arranged at the end part of the telescopic arm 16a in a rotating mode, an installation frame 16e is arranged at the lower end of the supporting oil cylinder 16b in a rotating mode, two crawler wheels 16f are respectively arranged on two sides of the installation frame 16e in a rotating mode, a crawler belt 16g is arranged on the two crawler wheels 16f at the same side, the locking screw 16h is screwed at the end part of the rotating arm 16c, the lower end of the locking screw 16h abuts against the telescopic arm 16a, and the rotating motor 16d and the supporting oil cylinder 16b are both electrically connected with the control steering wheel 7 a;

the crawler belt 16g is suspended, and when heavy objects are transported or the objects are carried to a higher place, the center of gravity is not stable enough, the rotating motor 16d is controlled to rotate outwards by controlling the steering wheel 7a, so as to drive the rotating arm 16c to open outwards, and after the rotating arm is opened to a proper position, the supporting oil cylinder 16b is controlled to extend out by controlling the steering wheel 7a to drive the mounting frame 16e to move downwards, the crawler belt 16g is abutted against the ground, the supporting oil cylinder 16b can rotate relative to the telescopic arm 16a and the mounting frame 16e, the rotation freedom degree of the crawler belt 16g is ensured, at the moment, the crawler belt 16g can walk and turn along with the movement of the device, the gravity center is ensured to be stable, when heavier objects are carried, can pull out flexible arm 16a, pull out the back, rotatory locking screw 16h, locking screw 16 h's lower extreme is contradicted on flexible arm 16a, locks flexible arm 16a, guarantees more stable removal transport.

In the present embodiment, the above fixing manners are all the most commonly used fixing and connecting manners in the art, such as welding, bolting, and the like; the above electrical components such as the travel switch 7c and the power assisting motor 7d are all products in the prior art, and can be directly purchased and used in the market, and the specific principle is not repeated.

The working principle of the utility model is as follows:

a user can stand above the vertical plate 3 or adjust the height of the lifting rotary seat 4 according to the body type of the user, and sit on the lifting rotary seat 4;

the user controls the driving wheel set 11 to move forward and backward by controlling the steering wheel 7a to drive the device to move, when needing to turn, the user rotates the control steering wheel 7a to drive the bogie 7b to rotate around the steering shaft 15, the bogie 7b pushes the travel switch 7c at the side, the travel switch 7c sends a control signal back to the control steering wheel 7a, the control steering wheel 7a controls the power-assisted motor 7d to rotate towards the direction to drive the steering shaft 15 to rotate, so as to drive the first connecting rod 2a to rotate around the steering shaft 15, the first connecting rod 2a pulls or pushes the second connecting rod 2b, the second connecting rod 2b pulls or pushes one of the synchronous frames 2e to rotate, the synchronous frame 2e drives the other synchronous frame 2e to synchronously rotate through the synchronous rod 2d, the two synchronous frames 2e respectively drive the steering wheels 2f to synchronously rotate, namely, the left turn or the right turn is completed, the power-assisted motor 7d provides steering power;

in the walking or steering process, the buffer anti-shake device 6 can shake, and at the moment, the buffer anti-shake device can stretch and retract, so that the vibration of the steering wheel 2f is absorbed, and the walking and steering stability is ensured;

before the fork is moved to an article to be forked, the fork frame 10 is inserted below the article, the steering wheel 7a is controlled to control the lifting oil cylinder 14 to extend out, the lifting arm 9 is jacked up, the lifting arm 9 drives the fork frame 10 to move upwards, the balance connecting rod 13 rotates along with the fork frame 10, the fork frame 10 is guaranteed to stably move upwards, and therefore the article is driven to stably move upwards, the structure is stable, and the center of gravity is stable;

when heavy articles are transported or the articles are carried to a higher position, the gravity center is not stable enough, the steering wheel 7a is controlled to control the rotating motors 16d of the two supporting mechanisms 16 to synchronously rotate outwards to drive the rotating arms 16c to open outwards, and after the rotating arms are opened to proper positions, the supporting oil cylinder 16b is controlled to extend out by controlling the steering wheel 7a to drive the mounting frame 16e to move downwards, the crawler belt 16g is abutted against the ground, the supporting oil cylinder 16b can rotate relative to the telescopic arm 16a and the mounting frame 16e, the rotation freedom degree of the crawler belt 16g is ensured, at the moment, the crawler belt 16g can walk and turn along with the movement of the device, the gravity center is ensured to be stable, when heavier objects are carried, can pull out flexible arm 16a, pull out the back, rotatory locking screw 16h, locking screw 16 h's lower extreme is contradicted on flexible arm 16a, locks flexible arm 16a, guarantees more stable removal transport.

But the goods display screen 7g and a plurality of control button cooperation of fork-lift record transport goods product's name specification quantity, form the valid data.

In conclusion, the counterweight vehicle body 1 is matched with the supporting mechanism 16, so that the device is effectively supported, the center of gravity is stable, meanwhile, the supporting oil cylinder 16b can rotate relative to the telescopic arm 16a and the mounting frame 16e, and the supporting mechanism 16 can walk and turn along with the movement of the device, so that the center of gravity is stable during walking; the power-assisted steering mechanism 7, the steering shaft 15, the weight box 5 and the steering wheel set 2 are matched, so that the power-assisted steering device is labor-saving in steering, convenient and stable, and can be used for a long time; the buffer anti-shake device 6 is connected with the counterweight vehicle body 1, the vertical frame 8 and the steering wheel set 2, so that the vibration in the walking and steering processes is effectively reduced, and the walking and steering stability is ensured; through the cooperation of the vertical plate 3 and the lifting rotary seat 4, the requirements of synchronous movement and sitting operation are met, and the labor is saved for a user.

Although the preferred embodiments of the present patent have been described in detail, the present patent is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present patent within the knowledge of those skilled in the art.

Claims

1. An electric forklift with stable lifting and walking comprises a counterweight body (1), a boom (9), a lifting oil cylinder (14), a balance connecting rod (13) and a fork frame (10), and is characterized in that a driving wheel set (11) is arranged on the front side of the counterweight body (1), a vertical frame (8) is fixed at the upper end of the counterweight body (1), two ends of the boom (9) and two ends of the balance connecting rod (13) are respectively and rotatably connected to the vertical frame (8) and the fork frame (10), the balance connecting rod (13) is positioned below the boom (9), a base of the lifting oil cylinder (14) is hinged to a frame, an extending end of the lifting oil cylinder (14) penetrates through the balance connecting rod (13), the extending end of the lifting oil cylinder (14) is hinged to the boom (9), a counterweight box (5) is fixed at the rear side of the vertical frame (8), a steering shaft (15) penetrating through the counterweight box (5) is rotatably arranged inside the counterweight box (5), the power-assisted steering mechanism (7) is arranged at the upper end of the steering shaft (15), the steering wheel set (2) is arranged at the lower end of the weight box (5), the steering shaft (15) is in transmission connection with the steering wheel set (2), two buffer anti-shaking devices (6) which are bilaterally symmetrical are arranged between the weight vehicle body (1), the vertical frame (8) and the steering wheel set (2), and two symmetrical supporting mechanisms (16) are arranged above the weight vehicle body (1).

2. A lifting and walking stable electric fork-lift truck as claimed in claim 1, characterized in that the left and right sides of said counterweight truck body (1) are provided with electric storage boxes (12), a plurality of counterweight plates are arranged inside the counterweight truck body (1) and the counterweight box (5), a vertical plate (3) is fixed at the rear side of the counterweight box (5), and a lifting and rotating seat (4) is detachably arranged above the vertical plate (3).

3. A lifting walking stable electric fork-lift truck according to claim 2, characterized in that the power steering mechanism (7) comprises a steering frame (7b), a power motor (7d), a mounting plate (7e) and a U-shaped plate (7f), the U-shaped plate (7f) is fixed on the upper end of the weight box (5), the power motor (7d) is fixed on the U-shaped plate (7f), a steering shaft (15) is fixed inside the rotating hole of the power motor (7d), the mounting plate (7e) is fixed on the steering shaft (15), the mounting plate (7e) is positioned above the power motor (7d), two symmetrical travel switches (7c) are fixed on the mounting plate (7e), the steering frame (7b) is rotatably arranged on the steering shaft (15), the steering frame (7b) is positioned between the two travel switches (7c), the upper end of the steering frame (7b) is provided with a control steering wheel (7a), the control steering wheel (7a) is provided with a display screen (7g) and a plurality of control buttons, and the control steering wheel (7a) is electrically connected with the travel switch (7c), the power-assisted motor (7d), the lifting oil cylinder (14), the driving wheel set (11) and the storage battery box (12) respectively.

4. A lifting and walking stable electric fork-lift truck as claimed in claim 2 or 3, wherein said steering wheel set (2) comprises a first connecting rod (2a), a second connecting rod (2b) and a mounting rod (2c), the mounting rod (2c) is fixed under the weight box (5), two ends of the mounting rod (2c) are rotatably provided with symmetrical synchronizing frames (2e), the outer sides of the synchronizing frames (2e) are respectively provided with a steering wheel (2f), a synchronizing rod (2d) is hinged between the two synchronizing frames (2e), one end of the first connecting rod (2a) is fixed at the lower end of the steering shaft (15), one end of the second connecting rod (2b) is hinged with the other end of the first connecting rod (2a), and the other end of the second connecting rod (2b) is hinged with one of the synchronizing frames (2 e).

5. The electric forklift with the lifting walking stability as recited in claim 4, wherein the supporting mechanism (16) comprises a rotating motor (16d) and a locking screw (16h), the rotating motor (16d) is fixed on the upper end of the counterweight body (1), the rotating motor (16d) is located on one side close to the driving wheel set (11), a rotating arm (16c) is fixed on an output shaft of the rotating motor (16d), a telescopic arm (16a) is slidably arranged inside the rotating arm (16c), a supporting cylinder (16b) is rotatably arranged at the end of the telescopic arm (16a), a mounting frame (16e) is rotatably arranged at the lower end of the supporting cylinder (16b), two crawler wheels (16f) are respectively rotatably arranged on two sides of the mounting frame (16e), a crawler belt (16g) is arranged on the two crawler wheels (16f) on the same side, the locking screw (16h) is screwed on the end of the rotating arm (16c), the lower end of the locking screw rod (16h) is abutted against the telescopic arm (16a), and the rotating motor (16d) and the supporting oil cylinder (16b) are both electrically connected with the control steering wheel (7 a).