CN217025117U

CN217025117U - Telescopic support leg and crane

Info

Publication number: CN217025117U
Application number: CN202220537057.5U
Authority: CN
Inventors: 张军; 刘帮才
Original assignee: Hebei Leisa Heavy Construction Machinery Co ltd
Current assignee: Hebei Leisa Heavy Construction Machinery Co ltd
Priority date: 2022-03-11
Filing date: 2022-03-11
Publication date: 2022-07-22
Anticipated expiration: 2032-03-11

Abstract

The present disclosure relates to a telescopic leg and a crane, the telescopic leg comprises: the device comprises a connecting frame, a fixed box, a first horizontal supporting leg, a second horizontal supporting leg, a vertical telescopic supporting leg and a driving mechanism; the connecting frame is used for being connected with a vehicle body, the fixed box is connected to the connecting frame, and one end of the fixed box is open; the first horizontal supporting leg is sleeved on the second horizontal supporting leg in a sliding mode, the first horizontal supporting leg and the second horizontal supporting leg are both positioned in the fixed box, the first horizontal supporting leg is connected with the fixed box in a sliding mode, and the vertical telescopic supporting leg is connected to the first end of the second horizontal supporting leg; the driving mechanism is connected in the fixed box, and the driving end of the driving mechanism is connected with the first horizontal supporting leg and the second horizontal supporting leg. The telescopic supporting leg can not be influenced by slurry, the width of a vehicle body can not be increased, and the running of the vehicle body is not influenced.

Description

Telescopic support leg and crane

Technical Field

The disclosure relates to the technical field of cranes, in particular to a telescopic supporting leg and a crane.

Background

The crane refers to a multi-action hoisting machine for vertically lifting and horizontally carrying heavy objects in a certain range. In order to ensure the anti-tipping of the crane, the crane is provided with telescopic supporting legs, and the supporting legs contact with the ground to play a role in reacting force, so that the safety and the stability of the crane are ensured.

Present telescopic leg can't be withdrawed completely when not using in the frame, telescopic leg's tip position can expose externally, causes the width increase of vehicle, influences the vehicle and goes, goes on the telescopic leg with mud etc. spattering easily in addition in the vehicle goes, and long-time deposit leads to telescopic leg's flexible to receive the influence easily, influences the hoist and carries out the operation.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a telescopic support leg and hoist, in order to solve the unable complete income frame of current telescopic support leg in, influence the vehicle and travel, the easy problem of damaging simultaneously.

To achieve the above object, an aspect of the present disclosure provides a telescopic leg including: the device comprises a connecting frame, a fixed box, a first horizontal supporting leg, a second horizontal supporting leg, a vertical telescopic supporting leg and a driving mechanism;

the connecting frame is used for being connected with a vehicle body, the fixed box is connected to the connecting frame, and one end of the fixed box is open;

the first horizontal supporting leg is sleeved on the second horizontal supporting leg in a sliding mode, the first horizontal supporting leg and the second horizontal supporting leg are both positioned in the fixed box, the first horizontal supporting leg is connected with the fixed box in a sliding mode, and the vertical telescopic supporting leg is connected to the first end of the second horizontal supporting leg;

the driving mechanism is connected in the fixed box, the driving end of the driving mechanism is connected with the first horizontal supporting leg and the second horizontal supporting leg, and the driving mechanism is used for driving the first end of the first horizontal supporting leg to slide out of the fixed box and the second horizontal supporting leg to slide out of the first horizontal supporting leg through the opening.

Optionally, one end of the fixed box, which is provided with the opening, is provided with a notch for the vertical telescopic supporting leg to extend out of the fixed box.

Optionally, the retractable leg further comprises a storage box, the storage box is connected to the end, provided with the opening, of the fixed box, and an opening is formed in the storage box, through which the vertical retractable leg can pass, so that the storage box can accommodate the vertical retractable leg.

Optionally, the telescopic leg further comprises a locking pin seat, the locking pin seat is connected to the fixed box, a pin shaft is arranged on the locking pin seat, and a locking pin hole matched with the pin shaft is formed in the first end of the second horizontal leg.

Optionally, the first horizontal leg extends along a length of the stationary box, the length of the stationary box being greater than the length of the first horizontal leg.

Optionally, the vertical telescopic leg comprises a vertical oil cylinder and a vertical leg, a first end of the second horizontal leg is provided with a mounting hole, the vertical oil cylinder is connected in the mounting hole, and the vertical leg is connected to the telescopic end of the vertical oil cylinder.

Optionally, the driving mechanism comprises a first horizontal oil cylinder and a second horizontal oil cylinder, the first horizontal oil cylinder is connected in the fixed box, the second horizontal oil cylinder is connected to the telescopic end of the first horizontal oil cylinder, and two ends of the second horizontal oil cylinder are respectively hinged to the first horizontal supporting leg and the second horizontal supporting leg.

Optionally, the first end of first horizontal cylinder is provided with first mount pad, first mount pad articulates on the inner wall of fixed case, the second end of first horizontal cylinder articulates there is the second mount pad, the second mount pad is connected the middle part of second horizontal cylinder, the first end of second horizontal cylinder is provided with the third mount pad, the third mount pad articulates on first horizontal landing leg, the second end of second horizontal cylinder is provided with the fourth mount pad, the fourth mount pad articulates on the second horizontal landing leg.

Optionally, actuating mechanism includes third horizontal cylinder, first flexible rope row, first gyro wheel, the flexible rope row of second and second gyro wheel, the first end of third horizontal cylinder is connected on the fixed incasement wall, the second gyro wheel rotates to be connected the second of third horizontal cylinder is served, the middle part of third horizontal cylinder is connected on the first horizontal leg, the flexible rope row of second is established around on the second gyro wheel, the both ends that the flexible rope row of second is connected respectively the second horizontal leg with on the fixed case, first gyro wheel rotates to be connected on the first horizontal leg, the flexible rope row of first is established around on the first gyro wheel, the both ends that the flexible rope row of first is connected respectively the second horizontal leg with on the fixed case.

The crane comprises a crane body, hoisting equipment and the telescopic supporting legs, wherein the hoisting equipment is connected to the crane body, and the connecting frame is connected to the crane body.

Through above-mentioned technical scheme, can accomodate first horizontal leg and second horizontal leg through the fixed box that sets up for first horizontal leg and second horizontal leg can slide into the fixed box completely in, shelter from the protection to first horizontal leg and second horizontal leg through the fixed box, avoid mud to spatter and influence its flexible use on first horizontal leg and the second horizontal leg. In addition, when the foldable support is not needed to be used, the first horizontal support leg and the second horizontal support leg can be completely contained in the fixed box, the width of the vehicle body cannot be increased, and the running of the vehicle body is not influenced. In addition, compared with the existing crane, the first horizontal supporting leg and the second horizontal supporting leg are completely collected into the fixed box, and under the condition of the same vehicle body width, after the first horizontal supporting leg and the second horizontal supporting leg are completely extended out, the transverse span can be increased, and the hoisting bearing capacity is improved.

Additional features and advantages of the present disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure, but do not constitute a limitation of the disclosure. In the drawings:

FIG. 1 is a perspective view of one state of a telescoping leg of one embodiment of the present disclosure;

FIG. 2 is a perspective view of another state of a telescoping leg of one embodiment of the present disclosure;

FIG. 3 is a perspective view of one state of the drive mechanism of one embodiment of the present disclosure;

FIG. 4 is a perspective view of another state of a drive mechanism of an embodiment of the present disclosure;

FIG. 5 is a schematic structural view of a first telescopic cord row of a drive mechanism of another embodiment of the present disclosure;

FIG. 6 is a schematic structural view of a second telescopic row of cords of a drive mechanism according to another embodiment of the present disclosure;

fig. 7 is a schematic structural view of a third horizontal cylinder of a driving mechanism according to another embodiment of the present disclosure.

Description of the reference numerals

1. A connecting frame; 2. a stationary box; 3. a storage box; 4. an opening; 5. a first horizontal leg; 6. a second horizontal leg; 7. a vertical oil cylinder; 8. a locking pin boss; 9. a locking pin hole; 10. a first horizontal cylinder; 11. a first mounting seat; 12. a second mounting seat; 13. a second horizontal cylinder; 14. a third mounting seat; 15. a fourth mounting seat; 16. a third horizontal cylinder; 17. a fifth mounting seat; 18. a sixth mounting seat; 19. a first telescopic rope row; 20. a first roller; 21. a first fixed seat; 22. a second fixed seat; 23. a second telescopic rope row; 24. a third fixed seat; 25. a second roller; 26. a fourth fixed seat; 27. a bracket; 28. a notch; 29. a vertical leg; 30. and (7) mounting holes.

Detailed Description

The following detailed description of the embodiments of the disclosure refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.

In the present disclosure, unless otherwise specified, the use of directional terms such as "upper, lower, left, and right" are generally defined as directions of the drawing figures of the drawings, and "inner and outer" refer to inner and outer of the relevant components. Furthermore, the terms "first," "second," and the like are used solely to distinguish one from another, and are not to be construed as indicating or implying relative importance.

In the description of the present disclosure, it is also to be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present disclosure can be understood in specific instances by those of ordinary skill in the art.

As shown in fig. 1-7, one aspect of the present disclosure provides a telescopic leg including: the device comprises a connecting frame 1, a fixed box 2, a first horizontal supporting leg 5, a second horizontal supporting leg 6, a vertical telescopic supporting leg and a driving mechanism.

The link 1 is used for being connected with the automobile body, and fixed case 2 is connected on link 1, and the one end of fixed case 2 is uncovered.

First horizontal leg 5 slip cover is established on second horizontal leg 6, and first horizontal leg 5 and second horizontal leg 6 all are located fixed case 2, and first horizontal leg 5 and fixed case 2 sliding connection, and the landing leg that stretches out and draws back perpendicularly is connected on the first end of second horizontal leg 6.

The driving mechanism is connected in the fixed box 2, the driving end of the driving mechanism is connected with the first horizontal supporting leg 5 and the second horizontal supporting leg 6, and the driving mechanism is used for driving the first end of the first horizontal supporting leg 5 to slide out of the fixed box 2 through the opening and slide out of the first horizontal supporting leg 5 through the second horizontal supporting leg 6.

Wherein, link 1 is used for supporting fixed box 2, and link 1 is used for connecting on the roof beam of automobile body, and fixed box 2 is located link 1 and keeps away from one end of automobile body to make fixed box 2 be located the side of automobile body, so as to provide reaction force. One end of the fixed box 2 is designed to be open, so that the first horizontal leg 5 and the second horizontal leg 6 can slide out of the fixed box 2 through the opening, the transverse span is increased, sufficient reaction force is provided, and the hoisting bearing range is high.

The first horizontal leg 5 is sleeved on the second horizontal leg 6 in a sliding mode, so that the first horizontal leg 5 and the second horizontal leg 6 can slide relatively, and the second horizontal leg 6 can retract into the first horizontal leg 5 and can extend or shorten to change the transverse span. It can be understood that the first horizontal leg 5 can slide relative to the fixed box 2, so that the first horizontal leg 5 can slide out of the fixed box 2 and can also be completely retracted into the fixed box 2, and the second horizontal leg 6 can slide out of the first horizontal leg 5 and can also be retracted into the second horizontal leg 6, thereby realizing two-stage telescopic adjustment. The vertical telescopic supporting legs are used for extending to contact with the ground to realize reaction force, and can be shortened when the lifting is not needed.

The driving mechanism is used for driving the first horizontal supporting leg 5 and the second horizontal supporting leg 6, so that the first horizontal supporting leg 5 and the second horizontal supporting leg 6 are pushed out when the lifting device is required to be used, the transverse span can be increased, and the extending length of the first horizontal supporting leg 5 and the second horizontal supporting leg 6 can be set according to actual lifting requirements.

Among the above-mentioned technical scheme, can accomodate first horizontal leg 5 and second horizontal leg 6 through the fixed case 2 that sets up for first horizontal leg 5 and second horizontal leg 6 can slide into fixed case 2 completely in, shelter from the protection through fixed case 2 to first horizontal leg 5 and second horizontal leg 6, avoid mud to spatter and influence its flexible use on first horizontal leg 5 and second horizontal leg 6. In addition, when the bicycle is not needed to be used, the first horizontal supporting leg 5 and the second horizontal supporting leg 6 can be completely contained in the fixed box 2, the width of the bicycle body cannot be increased, and the driving of the bicycle body cannot be influenced. In addition, compared with the existing crane, the first horizontal supporting leg 5 and the second horizontal supporting leg 6 are completely collected into the fixed box 2, under the condition of the same vehicle body width, when the first horizontal supporting leg 5 and the second horizontal supporting leg 6 are completely extended, the transverse span can be increased, and the hoisting load capacity can be improved.

Optionally, in an embodiment of the present disclosure, an open end of the fixed box 2 is provided with a notch 28 for the vertical telescopic leg to extend out of the fixed box 2.

In the embodiment, after the first horizontal leg 5 and the second horizontal leg 6 are retracted into the fixed box 2, the vertically telescopic legs can be extended out of the fixed box 2 through the notch 28, so that the second horizontal leg 6 can be fully retracted into the fixed box 2. It should be noted that when the first horizontal leg 5 and the second horizontal leg 6 are retracted into the fixing box 2, the vertically extendable legs can be snapped into the notches 28 after approaching the fixing box 2, so as not to interfere with the extension and retraction of the first horizontal leg 5 and the second horizontal leg 6.

Specifically, in the present embodiment, the top end and the bottom end of the fixed box 2 are both provided with the notches 28, and the middle portion of the vertical telescopic leg is connected with the second horizontal leg 6, so that the upper end and the lower end of the vertical telescopic leg respectively extend out of the fixed box 2 from the upper notch 28 and the lower notch 28. In other embodiments, the top end of the vertical telescopic leg is connected to the second horizontal leg 6, so that only the bottom end of the fixing box 2 needs to be provided with the notch 28, which can be specifically set according to actual needs.

Optionally, in an embodiment of the present disclosure, the retractable leg further includes a storage box 3, the storage box 3 is connected to one end of the fixed box 2, which is provided with an opening, and an opening 4 for the vertical retractable leg to pass through is formed in the storage box 3, so that the storage box 3 can accommodate the vertical retractable leg.

Wherein, in this embodiment, containing box 3 is used for sheltering from the protection to the vertical telescopic leg, and containing box 3 can prevent that mud from spattering on the vertical telescopic leg, influences the flexible operation of vertical telescopic leg. Specifically, the opening 4 provided in the storage box 3 can facilitate the vertically-extendable legs to move into or out of the storage box 3 through the opening 4 when the first horizontal leg 5 and the second horizontal leg 6 are extended or retracted. Specifically, the opening 4 communicates with the notch 28 in the above embodiment, so that the extension or retraction of the first horizontal leg 5 and the second horizontal leg 6 is not required.

Optionally, in an embodiment of the present disclosure, the telescopic leg further includes a locking pin seat 8, the locking pin seat 8 is connected to the fixed box 2, a pin shaft is disposed on the locking pin seat 8, and a locking pin hole 9 adapted to the pin shaft is disposed at the first end of the second horizontal leg 6.

In the embodiment, the locking pin seat 8 is located on the outer side wall of the fixed box 2, a through hole for the pin to pass through is formed in the side wall of the fixed box 2, and the second horizontal supporting leg 6 can be locked by inserting the pin into the locking pin hole 9 through the through hole.

It can be understood that when the vehicle is not used, the pin shaft penetrates through the through hole and is inserted into the middle locking pin hole 9, so that the second horizontal supporting leg 6 is locked and cannot move randomly, and the influence on the running of a vehicle body can be avoided. When the use is needed, the pin shaft is pulled out of the pin hole, and the second horizontal supporting leg 6 can be normally extended out.

Optionally, in an embodiment of the present disclosure, the first horizontal leg 5 extends along a length direction of the fixed box 2, and a length of the fixed box 2 is greater than a length of the first horizontal leg 5.

In the embodiment, the length of the fixing box 2 is greater than that of the first horizontal leg 5, so that the first horizontal leg 5 still has a residual space when being completely retracted into the fixing box 2, thereby facilitating the first horizontal leg 5 to be completely retracted into the fixing box 2.

Optionally, in an embodiment of the present disclosure, the vertical telescopic leg includes a vertical cylinder 7 and a vertical leg 29, a mounting hole 30 is opened on the first end of the second horizontal leg 6, the vertical cylinder 7 is connected in the mounting hole 30, and the vertical leg 29 is connected to the telescopic end of the vertical cylinder 7.

In the present embodiment, the vertical oil cylinder 7 is used to drive the vertical supporting leg 29 to move up and down, and the vertical oil cylinder 7 can extend or shorten. It will be appreciated that when in use, the vertical cylinder 7 is extended and the bottom end of the vertical leg 29 is in contact with the ground. When the device is not used, the vertical oil cylinder 7 is shortened, and the vertical supporting leg 29 is driven by the vertical oil cylinder 7 to move up and down and is separated from the ground.

Specifically, the mounting hole 30 penetrates through the first end of the second horizontal leg 6, the vertical oil cylinder 7 penetrates through the mounting hole 30, and the middle part of the vertical oil cylinder 7 is fixedly connected in the mounting hole 30.

Optionally, in an embodiment of the present disclosure, the driving mechanism includes a first horizontal cylinder 10 and a second horizontal cylinder 13, the first horizontal cylinder 10 is connected inside the fixed box 2, the second horizontal cylinder 13 is connected to the telescopic end of the first horizontal cylinder 10, and two ends of the second horizontal cylinder 13 are respectively hinged to the first horizontal leg 5 and the second horizontal leg 6.

In the present embodiment, the first horizontal cylinder 10 can be extended and shortened, and the second horizontal cylinder 13 can be extended and shortened. When the first horizontal cylinder 10 extends or shortens, the second horizontal cylinder 13 can be driven to move, so that the first horizontal supporting leg 5 and the second horizontal supporting leg 6 are driven to move together, and when the second horizontal cylinder 13 extends or shortens, the second horizontal supporting leg 6 can be driven to move.

Specifically, in the present embodiment, the first horizontal cylinder 10 is located in the fixed box 2, and when the first horizontal cylinder 10 extends and contracts, the first horizontal leg 5 and the second horizontal leg 6 move as a whole. When the second horizontal oil cylinder 13 extends and retracts, the second horizontal supporting leg 6 slides relative to the first horizontal supporting leg 5. It should be noted that, during actual use, the first horizontal cylinder 10 or the second horizontal cylinder 13 may be controlled to extend or retract respectively as needed, or the first horizontal cylinder 10 and the second horizontal cylinder 13 may be controlled to extend or retract together at the same time, so that the first horizontal leg 5 and the second horizontal leg 6 may be controlled to move conveniently, and secondary driving may be implemented.

Optionally, in an embodiment of the present disclosure, a first end of the first horizontal cylinder 10 is provided with a first mounting seat 11, the first mounting seat 11 is hinged on the inner wall of the fixed box 2, a second end of the first horizontal cylinder 10 is hinged with a second mounting seat 12, the second mounting seat 12 is connected in the middle of a second horizontal cylinder 13, a first end of the second horizontal cylinder 13 is provided with a third mounting seat 14, the third mounting seat 14 is hinged on the first horizontal leg 5, a second end of the second horizontal cylinder 13 is provided with a fourth mounting seat 15, and the fourth mounting seat 15 is hinged on the second horizontal leg 6.

In the embodiment, the first end of the first horizontal oil cylinder 10 is hinged to the fixed box 2, and the second end of the first horizontal oil cylinder 10 is hinged to the middle of the second horizontal oil cylinder 13 through the second mounting seat 12, so that the first horizontal oil cylinder 10 can have certain ductility when being stretched, and stretching of the first horizontal oil cylinder 10 can be facilitated. The first end of the second horizontal oil cylinder 13 is hinged to the first horizontal supporting leg 5 through the third mounting seat 14, and the second end of the second horizontal oil cylinder 13 is hinged to the second horizontal supporting leg 6 through the fourth mounting seat 15, so that the second horizontal oil cylinder 13 can have certain ductility when being stretched, and stretching of the second horizontal oil cylinder 13 can be facilitated.

Optionally, in another embodiment of the present disclosure, the driving mechanism includes a third horizontal cylinder 16, a first telescopic rope row 19, a first roller 20, a second telescopic rope row 23, and a second roller 25, a first end of the third horizontal cylinder 16 is connected to the inner wall of the fixed box 2, the second roller 25 is rotatably connected to a second end of the third horizontal cylinder 16, a middle portion of the third horizontal cylinder 16 is connected to the first horizontal leg 5, the second telescopic rope row 23 is wound around the second roller 25, two ends of the second telescopic rope row 23 are respectively connected to the second horizontal leg 6 and the fixed box 2, the first roller 20 is rotatably connected to the first horizontal leg 5, the first telescopic rope row 19 is wound around the first roller 20, and two ends of the first telescopic rope row 19 are respectively connected to the second horizontal leg 6 and the fixed box 2.

In the present embodiment, the third horizontal cylinder 16 is used as a single driving source, and the first telescopic rope row 19, the first roller 20, the second telescopic rope row 23 and the second roller 25 are matched to drive the first horizontal leg 5 and the second horizontal leg 6 to extend or retract simultaneously.

Specifically, when the third horizontal cylinder 16 extends, the first horizontal leg 5 is driven to slide out of the fixing box 2, meanwhile, the second roller 25 is located at the second end of the third horizontal cylinder 16, when the third horizontal cylinder 16 extends, the second roller 25 is driven to move, at the moment, the second telescopic rope row 23 is wound on the second roller 25, the second telescopic rope row 23 is driven to move on the second roller 25, so that the second horizontal leg 6 is driven to slide out of the first horizontal leg 5, meanwhile, the first roller 20 is arranged on the first horizontal leg 5, along with the movement of the second horizontal leg 6, the first telescopic rope row 19 moves on the first roller 20, and the first horizontal leg 5 and the second horizontal leg 6 are always kept to extend out at the same time. When the third horizontal cylinder 16 is shortened, the principle is the same, and redundant description is omitted.

Optionally, in an embodiment of the present disclosure, a first fixing seat 21 and a second fixing seat 22 are respectively disposed at two ends of the first telescopic rope row 19, the first fixing seat 21 is connected to the second horizontal leg 6, and the second fixing seat 22 is connected to an inner side wall of the fixing box 2. The both ends of the flexible rope of second row 23 are provided with third fixing base 24 and fourth fixing base 26 respectively, and third fixing base 24 is connected on second horizontal leg 6, and fourth fixing base 26 is connected on the inside wall of fixed box 2.

Optionally, in an embodiment of the present disclosure, a middle portion of the third horizontal cylinder 16 is hinged to the first horizontal leg 5 through a fifth mounting seat 17, and a first end of the third horizontal cylinder 16 is hinged to an inner side wall of the fixed box 2 through a sixth mounting seat 18. Optionally, a bracket 27 is disposed at the second end of the third horizontal cylinder 16, so as to support the third horizontal cylinder 16, thereby improving stability.

Another aspect of this disclosure still provides a hoist, including automobile body, hoisting equipment and foretell flexible landing leg, hoisting equipment connects on the automobile body, and link 1 connects on the automobile body.

Optionally, in an embodiment of the present disclosure, the number of the telescopic legs may be multiple, and the multiple telescopic legs are respectively connected to four sides of the vehicle body, so as to be capable of playing a role in opposing forces in multiple directions.

The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

It should be noted that, in the above embodiments, the various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations will not be further described in the present disclosure.

In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.

Claims

1. A telescoping leg, comprising: the device comprises a connecting frame (1), a fixed box (2), a first horizontal supporting leg (5), a second horizontal supporting leg (6), a vertical telescopic supporting leg and a driving mechanism;

the connecting frame (1) is used for being connected with a vehicle body, the fixed box (2) is connected to the connecting frame (1), and one end of the fixed box (2) is open;

the first horizontal supporting leg (5) is sleeved on the second horizontal supporting leg (6) in a sliding mode, the first horizontal supporting leg (5) and the second horizontal supporting leg (6) are both located in the fixed box (2), the first horizontal supporting leg (5) is connected with the fixed box (2) in a sliding mode, and the vertical telescopic supporting leg is connected to the first end of the second horizontal supporting leg (6);

the driving mechanism is connected in the fixed box (2), the driving end of the driving mechanism is connected with the first horizontal supporting leg (5) and the second horizontal supporting leg (6), and the driving mechanism is used for driving the first end of the first horizontal supporting leg (5) to slide out of the fixed box (2) and the second horizontal supporting leg (6) to slide out of the first horizontal supporting leg (5) through the opening.

2. The telescopic leg as claimed in claim 1, wherein the open end of the fixed box (2) is provided with a notch (28) for the vertical telescopic leg to extend out of the fixed box (2).

3. The telescopic leg according to claim 1, further comprising a storage box (3), wherein the storage box (3) is connected to the end of the fixed box (2) where the opening is formed, and an opening (4) for the vertical telescopic leg to pass through is formed in the storage box (3), so that the storage box (3) can accommodate the vertical telescopic leg.

4. The telescopic leg as claimed in claim 1, further comprising a locking pin seat (8), wherein the locking pin seat (8) is connected to the fixed box (2), the locking pin seat (8) is provided with a pin shaft, and a first end of the second horizontal leg (6) is provided with a locking pin hole (9) adapted to the pin shaft.

5. Telescopic leg according to claim 1, wherein the first horizontal leg (5) extends in the length direction of the stationary box (2), the length of the stationary box (2) being greater than the length of the first horizontal leg (5).

6. The telescopic leg as claimed in claim 1, wherein the vertical telescopic leg comprises a vertical cylinder (7) and a vertical leg (29), the first end of the second horizontal leg (6) is provided with a mounting hole (30), the vertical cylinder (7) is connected in the mounting hole (30), and the vertical leg (29) is connected to the telescopic end of the vertical cylinder (7).

7. Telescopic leg according to claim 1, characterised in that the actuating mechanism comprises a first horizontal cylinder (10) and a second horizontal cylinder (13), the first horizontal cylinder (10) being connected inside the fixed box (2), the second horizontal cylinder (13) being connected to the telescopic end of the first horizontal cylinder (10), the two ends of the second horizontal cylinder (13) being hinged to the first horizontal leg (5) and the second horizontal leg (6), respectively.

8. The telescopic leg according to claim 7, wherein a first mounting seat (11) is arranged at a first end of the first horizontal oil cylinder (10), the first mounting seat (11) is hinged on the inner wall of the fixed box (2), a second mounting seat (12) is hinged at a second end of the first horizontal oil cylinder (10), the second mounting seat (12) is connected at the middle part of the second horizontal oil cylinder (13), a third mounting seat (14) is arranged at a first end of the second horizontal oil cylinder (13), the third mounting seat (14) is hinged on the first horizontal leg (5), a fourth mounting seat (15) is arranged at a second end of the second horizontal oil cylinder (13), and the fourth mounting seat (15) is hinged on the second horizontal leg (6).

9. The telescopic leg according to claim 1, characterized in that the driving mechanism comprises a third horizontal cylinder (16), a first telescopic rope row (19), a first roller (20), a second telescopic rope row (23) and a second roller (25), the first end of the third horizontal cylinder (16) is connected to the inner wall of the fixed box (2), the second roller (25) is rotatably connected to the second end of the third horizontal cylinder (16), the middle part of the third horizontal cylinder (16) is connected to the first horizontal leg (5), the second telescopic rope row (23) is wound on the second roller (25), the two ends of the second telescopic rope row (23) are respectively connected to the second horizontal leg (6) and the fixed box (2), the first roller (20) is rotatably connected to the first horizontal leg (5), the first telescopic rope row (19) is wound on the first roller (20), and two ends of the first telescopic rope row (19) are connected to the second horizontal supporting leg (6) and the fixed box (2) respectively.

10. A crane, characterized in that it comprises a carbody, a hoisting device and a telescopic leg according to any one of claims 1-9, said hoisting device being connected to said carbody, said attachment frame (1) being connected to said carbody.