CN212151351U

CN212151351U - Hoisting device and engineering vehicle

Info

Publication number: CN212151351U
Application number: CN202020413546.0U
Authority: CN
Inventors: 熊锦昌; 张平; 李尽歆
Original assignee: Sany Automobile Manufacturing Co Ltd
Current assignee: Hunan Province Ground Unmanned Equipment Engineering Research Center Co ltd
Priority date: 2020-03-27
Filing date: 2020-03-27
Publication date: 2020-12-15
Anticipated expiration: 2030-03-27

Abstract

The utility model provides a hoist device and engineering vehicle, wherein, hoist device, include: a leg base; the balance beam is hinged with the supporting leg seat and is positioned on the periphery of the supporting leg seat; and the fixing part is arranged on the balance beam. When the hoisting device is installed on an engineering vehicle for transportation or use, the balance beam can be connected to a secondary beam of the engineering vehicle through the fixing part, and the fixing part is located on the periphery of the leg seat, so that the mounting height difference exists between the fixing part and the lower end face of the leg seat, the height of the secondary beam can be properly reduced in the region for installing the leg seat on the engineering vehicle, or the secondary beam is not required to be arranged in the region for installing the leg seat, and the leg seat can be directly arranged on a main beam of the engineering vehicle. So, can reduce hoist device's mounting height through setting up of compensating beam and fixed part for hoist device can be applicable to the occasion that the ride height and mounting height have the requirement, makes hoist device application scope wider.

Description

Hoisting device and engineering vehicle

Technical Field

The utility model relates to a hoist and mount field particularly, relates to a hoist device and engineering vehicle.

Background

The existing hoisting equipment is often required to be transported along with an engineering vehicle or directly installed on a frame of the engineering vehicle as a crane on the vehicle in use, in order to enable the engineering vehicle to have large bearing capacity and torsion resistance, when the hoisting device is transported or installed, a front and a rear integral auxiliary beams are required to be additionally arranged above a main beam of a chassis frame, the hoisting device is directly installed on the auxiliary beams, and the engineering vehicle loaded with the hoisting device cannot normally pass or be used in occasions requiring the running height and the installation height.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least.

Therefore, the utility model discloses the first aspect provides a hoist device.

The utility model discloses the second aspect provides an engineering vehicle.

In view of this, according to the first aspect of the present invention, a hoisting device is provided, including: a leg base; the balance beam is hinged with the supporting leg seat and is positioned on the periphery of the supporting leg seat; the fixing part is arranged on the balance beam.

The utility model discloses a hoist device transports or uses when installing on engineering vehicle, the fixed part sets up on the compensating beam, the compensating beam is located leg seat week side, make the fixed part be in compensating beam one side, the compensating beam can be connected on engineering vehicle's auxiliary girder through the fixed part, because the fixed part is located leg seat's week side, there is mounting height difference between the terminal surface under fixed part and the leg seat, consequently, the region that is used for installing leg seat on engineering vehicle can suitably reduce the auxiliary girder height or need not to set up the auxiliary girder in the region of installing leg seat, the leg seat can directly set up on engineering vehicle's girder. So, can reduce hoist device's mounting height under the prerequisite that does not reduce transportation engineering vehicle chassis height through the setting of compensating beam and fixed part for hoist device can be applicable to the occasion that ride height and mounting height have the requirement, makes hoist device application scope wider.

Furthermore, the balance beam is hinged to one side of the supporting leg seat and can rotate relative to the supporting leg seat, so that the fixing part arranged on the balance beam only bears the gravity of the hoisting device and the forward pressure generated in the working process, and the torque generated by the hoisting device is borne by the main beam and the auxiliary beam of the engineering vehicle, so that the hoisting device is safer to transport or work.

Additionally, according to the utility model provides an among the above-mentioned technical scheme hoist device can also have following additional technical feature:

in the above technical solution, further, the fixing portion includes: the mounting grooves are formed in the balance beam and are positioned at two ends of the balance beam; the U-shaped fixing piece is connected to the mounting groove, the opening direction of the U-shaped fixing piece is the same as that of the mounting groove, and the U-shaped fixing piece is configured to be connected to a frame of the engineering vehicle; and the reinforcing ribs are connected to the balance beam and the U-shaped fixing piece.

In the technical scheme, the opening width of the U-shaped fixing piece arranged in the mounting groove is adapted to the width of the auxiliary beam of the engineering vehicle, the U-shaped fixing piece arranged in the mounting groove is arranged on the auxiliary beam in the mounting process of the hoisting device, so that the balance beam can be connected to the auxiliary beam of the engineering vehicle in a nested manner, the mounting height of the hoisting device is reduced by arranging the mounting groove on the balance beam, and the installation is convenient and fast.

Specifically, through setting up the mounting groove at the both ends of compensating beam, two U type mountings are connected respectively in the sub vehicle frame that is located engineering vehicle both sides for the fixed of compensating beam is more firm.

Particularly, the U-shaped fixing piece is more firmly fixed through the arrangement of the reinforcing ribs, and the U-shaped fixing piece is prevented from falling off.

In any of the above technical solutions, further, the fixing portion includes: the pin holes are formed in the balance beam; and the fixing shaft pin is adapted to penetrate through a frame and a pin hole of the engineering vehicle.

In the technical scheme, in the installation process of the hoisting device, the hoisting device is arranged on the engineering vehicle, the fixing shaft pin can penetrate through the pin hole and the auxiliary beam of the engineering vehicle to fix the balance beam on the engineering vehicle, the installation height of the hoisting device is reduced by arranging the pin hole on the balance beam, the hoisting device can be suitable for occasions with requirements on the running height and the installation height, and the application range of the hoisting device is wider.

In any of the above technical solutions, further, the fixing portion includes: the mounting plate is arranged on the balance beam and provided with a plurality of mounting holes; and the fixing bolt is adapted to penetrate through the frame and the mounting hole of the engineering vehicle.

In the technical scheme, in the installation process of the hoisting device, the hoisting device is arranged on the engineering vehicle, and the fixing bolt can penetrate through the mounting plate and the auxiliary beam of the engineering vehicle, so that the hoisting device can be suitable for occasions with requirements on the running height and the mounting height, and the application range of the hoisting device is wider.

In any of the above technical solutions, further, the method further includes: the articulated shaft, the articulated shaft is connected in the landing leg seat, and the middle part cover of compensating beam is established on the articulated shaft, and the compensating beam can rotate for the landing leg seat through the articulated shaft.

In the technical scheme, the hinge shaft is connected to the leg base, and the middle part of the balance beam is sleeved on the hinge shaft, so that the balance beam and the leg base form a modular structure and the mechanical strength of the lifting device can be increased; on the other hand, the middle part of the balance beam is hinged to the supporting leg seat, so that the balance beam is stressed more evenly, and the hoisting device is safer to use.

In any of the above technical solutions, further, the leg is connected to the leg base.

In this technical scheme, the landing leg is connected in the landing leg seat for support hoist device, bear hoist device's dead weight and the gravity that produces in the hoist device course of operation, make hoist device use safer.

In any of the above technical solutions, further, the method further includes: the rotary table seat is arranged on the supporting leg seat.

In the technical scheme, the rotary table seat is arranged on the leg seat, the balance beam is arranged on the periphery of the leg seat, so that the balance beam, the rotary table seat and the leg seat form a modular structure, and the mechanical strength of the hoisting device is improved.

Specifically, the hinge shaft may be connected to the turret base, and the rear balance beam is fitted over the hinge shaft.

In any of the above technical solutions, further, the method further includes: a turntable connected to the turntable base, the turntable being adapted to be rotatable relative to the turntable base; the arm support is connected with the rotary table.

In the technical scheme, the arm support is connected to a rotating table seat arranged on the leg seat through a rotating table, and the arm support can rotate relative to the leg seat, so that the torque required to be borne by the leg seat is reduced, and the hoisting device is safer to use.

According to the utility model discloses a second aspect provides an engineering vehicle, include: the hoisting device of any one of the above technical schemes; and the hoisting device is arranged on the frame.

In the technical scheme, the engineering vehicle comprises the hoisting device, so that the engineering vehicle has all the beneficial technical effects of the hoisting device.

In addition, according to the utility model provides an engineering vehicle among the above-mentioned technical scheme can also have following additional technical characteristics:

in the above technical solution, further, the frame includes: a main beam; the auxiliary beam is arranged on the main beam, covers partial area of the main beam, and forms an installation space between the uncovered main beam and the auxiliary beam; wherein, hoist device's landing leg seat squats and sets up in installation space, through bolted connection in girder, and the compensating beam passes through the fixed part and connects in the auxiliary girder.

In the technical scheme, the auxiliary beam only covers the partial area of the main beam, the balance beam of the hoisting device is connected to the auxiliary beam, the supporting leg seat is directly arranged on the main beam, the supporting leg is arranged on the supporting leg seat, the other end of the supporting leg is arranged on the bottom surface, the hoisting device can work along with the vehicle, the auxiliary beam and the main beam jointly bear the torque and the pressure applied by the balance beam in the working process of the hoisting device, and the main beam bears the pressure of the supporting leg seat. The installation height of the hoisting device is reduced on the premise of not influencing the trafficability of the engineering vehicle, so that the hoisting device can be suitable for occasions with requirements on the operation height and the installation height, the application range of the hoisting device is wider, and meanwhile, the safe operation of the hoisting device on the engineering vehicle can be ensured.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural view of an angular lifting device according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a hoisting device at another angle according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a hoisting device according to another embodiment of the present invention;

fig. 4 is a structural schematic view of an installation state of the hoisting device according to an embodiment of the present invention;

fig. 5 is a front view of the installation state of the hoisting device according to an embodiment of the present invention;

fig. 6 is a schematic view illustrating a connection state between the leg base and the main beam according to an embodiment of the present invention;

FIG. 7 is a schematic view of an angled vehicle frame according to an embodiment of the present invention;

FIG. 8 is a schematic view of a frame of the present invention at yet another angle according to an embodiment of the present invention;

FIG. 9 is a schematic view of a further angle frame according to an embodiment of the present invention;

fig. 10 is a schematic structural view of a main beam according to an embodiment of the present invention.

Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 10 is:

2, a leg seat, 4, a balance beam, 6, a fixing part, 8, a hinge shaft, 10, a turntable seat, 12, 14, an arm support and 18 riding bolts;

602 mounting grooves, 604U-shaped fixing pieces and 608 reinforcing ribs;

162 primary beam, 164 secondary beam.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

Hoisting devices and engineering vehicles provided according to some embodiments of the present invention are described below with reference to fig. 1 to 10.

Example one

As shown in fig. 1 to 10, an embodiment of the present invention provides a hoisting device, including: a leg seat 2, a balance beam 4 and a fixing part 6.

As shown in fig. 1 and 2, wherein the balance beam 4 is hinged with the leg base 2, and the balance beam 4 is located on the peripheral side of the leg base 2; the fixing portion 6 is provided on the balance beam 4.

As shown in fig. 4, the utility model discloses a hoist device is when installing and transporting or using on engineering vehicle, fixed part 6 sets up on compensating beam 4, compensating beam 4 is located leg seat 2 week side for fixed part 6 is in compensating beam 4 one side, compensating beam 4 can be connected on engineering vehicle's auxiliary girder 164 through fixed part 6, because fixed part 6 is located leg seat 2 week side, there is the mounting height difference between the terminal surface under fixed part 6 and the leg seat 2, consequently the region that is used for installing leg seat 2 on engineering vehicle can suitably reduce auxiliary girder 164 height or need not to set up the auxiliary girder in the region of installation leg seat 2, leg seat 2 can directly set up on engineering vehicle's girder 162. So, can reduce hoist device's mounting height through setting up of compensating beam 4 and fixed part 6 under the prerequisite that does not reduce transportation engineering vehicle chassis height for hoist device can be applicable to the occasion that ride height and mounting height have the requirement, makes hoist device application scope wider.

Further, the balance beam 4 is hinged to one side of the leg base 2, the balance beam 4 can rotate relative to the leg base 2, the fixing portion 6 arranged on the balance beam 4 only bears the gravity of the hoisting device and the positive pressure generated in the working process, the torque generated by the hoisting device is borne by the main beam 162 and the auxiliary beam 164 of the engineering vehicle, and the hoisting device is safer to transport or work.

Example two

Further, the fixing portion 6 includes: the mounting groove 602 is formed in the balance beam 4 and located at two ends of the balance beam 4; the U-shaped fixing piece 604 is connected to the installation groove 602, the opening direction of the U-shaped fixing piece 604 is the same as that of the installation groove 602, and the U-shaped fixing piece 604 is configured to be connected to a frame of the engineering vehicle; and the reinforcing rib 608 is connected to the balance beam 4 and the U-shaped fixing piece 604.

As shown in fig. 5 and 6, in this embodiment, the opening width of the U-shaped fastener 604 disposed in the mounting groove 602 is adapted to the width of the secondary beam 164 of the working vehicle, and the U-shaped fastener 604 disposed in the mounting groove 602 is disposed on the secondary beam 164 during the installation of the hoist device, so that the balance beam 4 can be connected to the secondary beam 164 of the working vehicle in a nested manner, and the installation height of the hoist device is reduced by providing the mounting groove 602 on the balance beam 4, and the installation is convenient.

Specifically, by arranging the mounting grooves 602 at both ends of the balance beam 4, the two U-shaped fixing members 604 are respectively connected to the sub-frames located at both sides of the engineering vehicle, so that the balance beam 4 is more stably fixed.

As shown in fig. 3, further, the method further includes: articulated shaft 8, articulated shaft 8 are connected in landing leg seat 2, and the middle part cover of compensating beam 4 is established on articulated shaft 8, and compensating beam 4 can rotate for landing leg seat 2 through articulated shaft 8.

In this embodiment, the hinge shaft 8 is connected to the leg base 2, and the middle part of the balance beam 4 is sleeved on the hinge shaft 8, so that the balance beam 4 and the leg base 2 form a modular structure to enable the mechanical strength of the lifting device to be high; on the other hand, the middle part of the balance beam 4 is hinged with the supporting leg seat 2, so that the stress of the balance beam 4 is more balanced, and the hoisting device is safer to use.

Further, a leg, which is connected to the leg rest 2.

In this embodiment, the supporting leg is connected to the supporting leg base 2, and is used for supporting the hoisting device, bearing the dead weight of the hoisting device and the gravity generated in the working process of the hoisting device, and enabling the hoisting device to be used more safely.

As shown in fig. 3, further, the method further includes: the turntable base 10 is provided on the leg base 2, and the turntable base 10 is provided on the leg base 2.

In this embodiment, the turntable base 10 is disposed on the leg base 2, and the balance beam 4 is disposed on the periphery of the leg base 2, so that the balance beam 4, the turntable base 10, and the leg base 2 are in a modular structure, and the mechanical strength of the hoisting device is improved.

As shown in fig. 3, further, the method further includes: a turntable 12, the turntable 12 being connected to said turntable base 10, the turntable 12 being adapted to be rotatable relative to the turntable base 10; an arm support 14, the arm support 14 being connected to the turntable 12.

In this embodiment, the arm support 14 is connected to the turntable base 10 disposed on the leg base 2 through the turntable 12, and the arm support 14 can rotate relative to the leg base 2, so as to reduce the torque required to be borne by the leg base 2, and make the hoisting device safer to use.

EXAMPLE III

Further, the fixing portion 6 includes: a plurality of pin holes formed in the balance beam 4; and the fixing shaft pin is adapted to penetrate through a frame and a pin hole of the engineering vehicle.

In this embodiment, in the installation process of the hoisting device, the hoisting device is arranged on the engineering vehicle, the fixing shaft pin can penetrate through the pin hole and the auxiliary beam 164 of the engineering vehicle, the balance beam 4 is fixed on the engineering vehicle, the installation height of the hoisting device is reduced by arranging the pin hole on the balance beam 4, the hoisting device can be suitable for occasions with requirements on the running height and the installation height, and the application range of the hoisting device is wider.

Further, a leg, which is connected to the leg rest 2.

Further, still include: the turntable base 10 is provided on the leg base 2, and the turntable base 10 is provided on the leg base 2.

Example four

Wherein, the balance beam 4 is hinged with the leg base 2, and the balance beam 4 is positioned on the periphery of the leg base 2; the fixing portion 6 is provided on the balance beam 4.

Further, the fixing portion 6 includes: the mounting plate is arranged on the balance beam 4 and is provided with a plurality of mounting holes; and the fixing bolt is adapted to penetrate through the frame and the mounting hole of the engineering vehicle.

In this embodiment, in the installation process of the hoisting device, the hoisting device is arranged on the engineering vehicle, and the fixing bolt can penetrate through the installation plate and the auxiliary beam 164 of the engineering vehicle, so that the hoisting device can be suitable for occasions with requirements on the running height and the installation height, and the application range of the hoisting device is wider.

Further, a leg, which is connected to the leg rest 2.

As shown in fig. 5, in this embodiment, the arm support 14 is connected to the turntable base 10 disposed on the leg base 2 through the turntable 12, and the arm support 14 can rotate relative to the leg base 2, so as to reduce the torque required to be borne by the leg base 2, and make the hoisting device safer to use.

EXAMPLE five

As shown in fig. 1 to 10, an embodiment of the present invention provides an engineering vehicle, including: the hoisting device and the frame of any of the above embodiments.

Wherein, hoist device sets up on the frame.

EXAMPLE six

Wherein, hoist device sets up on the frame.

As shown in fig. 6 and 7, further, the vehicle frame includes: a main beam 162; the secondary beam 164, the secondary beam 164 is arranged on the main beam 162, covers a partial area of the main beam 162, and forms an installation space between the uncovered main beam 162 and the secondary beam 164; wherein, the support leg seat 2 of the hoisting device is arranged in the installation space in a squatting manner and is connected with the main beam 162 through a bolt, and the balance beam 4 is connected with the auxiliary beam 164 through the fixing part 6.

As shown in fig. 8, in this embodiment, the secondary beam 164 covers only a partial area of the main beam 162, the balance beam 4 of the lifting device is connected to the secondary beam 164, the leg base 2 is directly disposed on the main beam 162, the leg is mounted on the leg base 2, and the other end of the leg is disposed on the bottom surface, so that the lifting device can work with the vehicle, and during the working process of the lifting device, the torque and the pressure applied by the balance beam 4 are jointly received by the secondary beam 164 and the main beam 162, and the pressure applied by the leg base 2 is received by the main beam 162. The installation height of the hoisting device is reduced on the premise of not influencing the trafficability of the engineering vehicle, so that the hoisting device can be suitable for occasions with requirements on the operation height and the installation height, the application range of the hoisting device is wider, and meanwhile, the safe operation of the hoisting device on the engineering vehicle can be ensured.

DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION

As shown in fig. 1 to 10, the embodiment provides a working vehicle, as shown in fig. 5 and 6, the leg seat 2 of the lifting device is squat above the main beam 162 and is fixedly connected to the main beam 162 by the installation form of the riding bolt 18. The balance beam 4 whose front part is connected with the leg base 2 is provided with a fixing part 6, the fixing part 6 comprises a mounting groove 602 and a U-shaped fixing piece 604 arranged in the mounting groove 602, and the reinforcing rib 608 is connected to the balance beam 4 and the U-shaped fixing piece 604, the U-shaped fixing piece 604 is installed in a manner of extending out of the frame, the secondary beam 164 is grasped, a rotatable structure is designed between the front balance beam 4 and the rotary table base 10, only positive pressure is applied to the U-shaped fixing piece 604, and torque is still borne by a rigid body formed by the main beam 162 and the secondary beam 164, so that the height is reduced, the convenience and reliability of the installation structure are ensured, the torsion resistance optimization of the part of the main beam 162 below the leg base 2 and the secondary beam 164 can be carried out in the frame design, and the arm support 14, the rotary table 12, the rotary table base 10, the leg base 2 and the balance beam 4 of the hoisting device can be integrally assembled on a frame assembly body formed by the main beam 162 and.

The address that hoisting device's landing leg seat 2, revolving stage seat 10 and compensating beam 4 of this embodiment formed is the structure of grabbing of squatting, and wherein landing leg seat 2 and revolving stage seat 10 become whole through the welding form, and compensating beam 4 adopts pin bushing formula to be connected with revolving stage seat 10, but relative rotation. The leg base 2 of the base of the hoisting device is directly seated on the main beam 162 of the engineering vehicle, as shown in fig. 10, the main beam 162 at the lower part of the leg base 2 is connected into a closed or semi-closed structure, the rotary table 12 and the balance beam 4 adopt a rotatable balance beam 4 structure, the left end and the right end of the balance beam 4 are designed into claw structures, and are nested with the auxiliary beam 164 to press the auxiliary beam 164 and prevent the auxiliary beam 164 from moving left and right. As shown in fig. 7 to 9, the whole hoisting device bears the torque borne by the integral structure formed by connecting the main beam 162 and the auxiliary beam 164.

This embodiment has the following advantageous effects:

1. the portability of the integral installation of the truck-mounted crane is ensured.

2. The optimization of the installation height and the gravity center of the hoisting device is completed on the premise of not reducing the trafficability (departure angle and ground clearance) of the engineering vehicle.

In the description of the present invention, the terms "plurality" or "a plurality" refer to two or more, and unless otherwise specifically limited, the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely 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 in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention; the terms "connected," "mounted," "secured," and the like are to be construed broadly and include, for example, fixed connections, removable connections, or integral connections; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description of the present specification, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A lifting device, comprising:

a leg base;

the balance beam is hinged with the supporting leg seat and is positioned on the periphery of the supporting leg seat;

and the fixing part is arranged on the balance beam.

2. The hoisting device of claim 1, wherein the fixing portion comprises:

the mounting grooves are formed in the balance beam and are positioned at two ends of the balance beam;

the U-shaped fixing piece is connected to the mounting groove, the opening direction of the U-shaped fixing piece is the same as that of the mounting groove, and the U-shaped fixing piece is configured to be connected to a frame of an engineering vehicle;

and the reinforcing rib is connected to the balance beam and the U-shaped fixing piece.

3. The hoisting device of claim 1, wherein the fixing portion comprises:

the pin holes are formed in the balance beam;

a fixing pin adapted to pass through a frame of an engineering vehicle and the pin hole.

4. The hoisting device of claim 1, wherein the fixing portion comprises:

the mounting plate is arranged on the balance beam and provided with a plurality of mounting holes;

a fixing bolt adapted to pass through a frame of an engineering vehicle and the mounting hole.

5. The hoisting device of any one of claims 1 to 4, further comprising:

the articulated shaft, the articulated shaft connect in the landing leg seat, the middle part cover of compensating beam is established on the articulated shaft, the compensating beam can pass through the articulated shaft for the landing leg seat rotates.

6. Hoisting device according to any one of claims 1 to 4,

a leg connected to the leg base.

7. The hoisting device of any one of claims 1 to 4, further comprising:

the rotary table seat is arranged on the supporting leg seat.

8. The hoisting device of claim 7, further comprising:

a turntable connected to the turntable base, the turntable being adapted to be rotatable relative to the turntable base;

the arm support is connected to the rotary table.

9. A work vehicle, characterized by comprising:

the lifting device of any one of claims 1 to 8; and

the frame, hoist device sets up on the frame.

10. The work vehicle of claim 9, wherein said frame comprises:

a main beam;

the auxiliary beam is arranged on the main beam, covers partial area of the main beam, and forms an installation space between the uncovered main beam and the auxiliary beam;

wherein, hoist device's landing leg seat squat to set up in the installation space, through bolted connection in the girder, the compensating beam passes through the fixed part connect in the auxiliary girder.