CN218560946U

CN218560946U - Hoisting equipment

Info

Publication number: CN218560946U
Application number: CN202222919161.3U
Authority: CN
Inventors: 焦战方; 俞胜; 吕文博
Original assignee: Sany America Inc
Current assignee: Sany America Inc
Priority date: 2022-10-31
Filing date: 2022-10-31
Publication date: 2023-03-03
Anticipated expiration: 2032-10-31

Abstract

The utility model relates to a jack-up field provides a hoisting equipment. The hoisting device comprises a counterweight component; the first telescopic support component is suitable for being connected with the counterweight component and hinged to the vehicle body so as to adjust the relative distance between the counterweight component and the vehicle body; the second telescopic support component is suitable for being connected to the counterweight component and hinged to the vehicle body so as to adjust the relative distance between the counterweight component and the ground; the amplitude variation assembly is connected between the tail end of the first telescopic supporting assembly and the main amplitude variation mast. The hoisting equipment can realize the self-adaptive adjustment of the counterweight moment, adjust the working radius of the counterweight component, meet the requirements of different working states on the counterweight moment, improve the boom lifting condition under the standard working condition and reduce the operation cost. Through the adjustment to the amplitude variation subassembly mounted position, can adjust the reverse moment of exerting on main amplitude mast, has got rid of the long boom and has played the dependence of mast and super brace rod when playing the arm, can realize the long boom and play the arm under the standard operating mode, reduce the operating cost.

Description

Hoisting equipment

Technical Field

The utility model relates to a jack-up field provides a hoisting equipment.

Background

When the hoisting equipment works, especially when the hoisting equipment faces a super-lifting working condition, the hoisting equipment is often hoisted by using a super-long main arm. When the main arm is lifted, a large moment is generated on the main arm due to the fact that the arm support is long, heavy and far in gravity center. Therefore, for the super-lift working condition, complete super-lift systems such as a super-lift mast, a super-lift stay bar and a super-lift counterweight need to be used to provide a large reverse moment for the main arm, so that the long-arm lifting is realized. And a part of designs adopt a folding and sectional arm lifting mode of an arm support. The above several ways of realizing the long arm raising are complex and the operation cost is high.

SUMMERY OF THE UTILITY MODEL

The present invention aims to solve at least one of the technical problems existing in the related art. Therefore, the utility model provides a hoisting equipment can avoid the long boom to play the mast and surpass the reliance of playing the vaulting pole when playing the arm, realizes the adaptation of multiplex condition, reduces the operating cost.

An embodiment of the utility model provides a hoisting equipment, include:

a counterweight assembly;

the first telescopic support component is suitable for being connected to the counterweight component and hinged to a vehicle body so as to adjust the relative distance between the counterweight component and the vehicle body;

the second telescopic support assembly is suitable for being connected to the counterweight assembly and hinged to the vehicle body so as to adjust the relative distance between the counterweight assembly and the ground;

and the amplitude variation assembly is connected between the tail end of the first telescopic supporting assembly and the main amplitude variation mast.

According to the embodiment of the utility model provides a hoisting equipment, through set up first flexible supporting component and the flexible supporting component of second between automobile body and counter weight component respectively, can realize the adjustment to relative distance between counter weight component and the automobile body through first flexible supporting component, realize the adjustment to relative distance between counter weight component and the ground through the flexible supporting component of second, and simultaneously, through becoming width of cloth subassembly setting on counter weight component, make counter weight component for automobile body and ground position adjustment back, can drive in step and become width of cloth subassembly for the position of automobile body and change, and then can reduce the single rope force, reduce and become the assembly pulley multiplying power in the width of cloth subassembly, the reverse moment at main width of cloth mast is applyed in the increase, the arm-lifting condition under the standard work condition has been improved. Through the stepless change to the counterweight component working radius, variable reverse torque can be provided for the engineering machinery such as cranes and the like which need to apply counterweight, the counterweight component adaptive control method is suitable for the demands of different working states on the counterweight torque, and meanwhile, larger torque can be provided for the engineering machinery such as cranes and the like under the same counterweight weight. In addition, dependence of the long boom raising arm on the super-raising mast and the super-raising stay bar is eliminated, the long boom raising arm under a standard working condition can be realized, the arm support dismounting efficiency is greatly improved, and the operation cost is reduced.

According to the utility model discloses an embodiment, first flexible supporting component includes:

the first end of the first telescopic piece is hinged to the vehicle body;

the movable support rod is connected to the second end of the first telescopic piece, the counterweight component is hoisted on the movable support rod, and the amplitude variation component is connected to one end, far away from the first telescopic piece, of the movable support rod.

According to the utility model discloses an embodiment, the flexible supporting component of second includes the second extensible member, the first end of second extensible member connect in the automobile body, the second end of second extensible member connect in remove the vaulting pole.

According to the utility model discloses an embodiment, become width of cloth subassembly includes:

the pulley is connected to one end, far away from the first telescopic piece, of the movable support rod;

and the steel cable is connected between the pulley and a main amplitude mast of the vehicle body.

According to the utility model discloses an embodiment, remove the vaulting pole with be provided with the third extensible member between the counter weight subassembly.

According to the utility model discloses an embodiment, the counter weight subassembly includes:

the first tray is provided with a main balancing weight and is provided with an installation space;

and the second tray is arranged in the installation space, and is provided with an auxiliary balancing weight.

According to the utility model discloses an embodiment, be provided with the connecting pin between the second tray with the first tray.

According to the utility model discloses an embodiment, be provided with the couple on the second tray, the couple is suitable for the hook to locate remove the vaulting pole.

According to an embodiment of the invention, the first telescopic element and at least one of the movable support rods is sleeved with a sleeve.

According to the utility model discloses an embodiment, first flexible supporting component with the flexible supporting component of second is two sets of and the one-to-one is connected, and is two sets of first flexible supporting component is two sets of the flexible supporting component of second is followed the width direction interval of automobile body sets up.

The embodiment of the utility model provides an in above-mentioned one or more technical scheme, one of following technological effect has at least:

according to the embodiment of the utility model provides a hoisting equipment, through set up first flexible supporting component and the flexible supporting component of second between automobile body and counter weight component respectively, can realize the adjustment to relative distance between counter weight component and the automobile body through first flexible supporting component, realize the adjustment to relative distance between counter weight component and the ground through the flexible supporting component of second, and simultaneously, through becoming width of cloth subassembly setting on counter weight component, make counter weight component for automobile body and ground position adjustment back, can drive in step and become width of cloth subassembly for the position of automobile body and change, and then can reduce the single rope force, reduce and become the assembly pulley multiplying power in the width of cloth subassembly, the reverse moment at main width of cloth mast is applyed in the increase, the arm-lifting condition under the standard work condition has been improved. Through the stepless change to the counterweight component working radius, variable reverse torque can be provided for the engineering machinery such as cranes and the like which need to apply counterweight, the counterweight component adaptive control method is suitable for the demands of different working states on the counterweight torque, and meanwhile, larger torque can be provided for the engineering machinery such as cranes and the like under the same counterweight weight. In addition, dependence of the long-arm lifting arm on the super-lifting mast and the super-lifting stay bar is eliminated, the long-arm lifting arm under the standard working condition can be realized, the disassembly and assembly efficiency of the arm support is greatly improved, and the operation cost is reduced.

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

Drawings

In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a first telescopic member, a movable stay bar and a pulley provided in an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a counterweight assembly provided by an embodiment of the present invention;

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

fig. 4 is a schematic structural diagram of another hoisting device provided by the embodiment of the present invention;

fig. 5 is a schematic structural diagram of a hoisting apparatus in an operating state according to an embodiment of the present invention.

Reference numerals:

100. a counterweight assembly; 102. a first telescoping support assembly; 104. a vehicle body; 106. a second telescoping support assembly; 108. a variable amplitude assembly; 110. a main variable mast; 112. a first telescoping member; 114. moving the stay bar; 116. a second telescoping member; 118. a pulley; 120. a steel cord; 122. a third telescoping member; 124. a first tray; 126. a main counterweight block; 128. a second tray; 130. a secondary balancing weight; 132. a connecting pin; 134. and (4) hanging hooks.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the embodiments of the present invention can be understood in specific cases by those skilled in the art.

In embodiments of the invention, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean 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 an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to 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. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

As shown in fig. 1 to 5, an embodiment of the present invention provides a hoisting apparatus, including a counterweight assembly 100, a first telescopic support assembly 102, a second telescopic support assembly 106, and a variable amplitude assembly 108; wherein the first telescopic support assembly 102 is adapted to be connected to the counterweight assembly 100 and hinged to the vehicle body 104 so as to adjust the relative distance between the counterweight assembly 100 and the vehicle body 104; the second telescopic support assembly 106 is adapted to be connected to the counterweight assembly 100 and hinged to the vehicle body 104 so as to adjust the relative distance between the counterweight assembly 100 and the ground; a luffing assembly 108 is connected between the aft end of the first telescoping support assembly 102 and a main luffing mast 110.

According to the utility model provides a hoisting equipment, through set up first flexible supporting component 102 and the flexible supporting component 106 of second between automobile body 104 and counter weight component 100 respectively, can realize the adjustment to relative distance between counter weight component 100 and the automobile body 104 through first flexible supporting component 102, realize the adjustment to relative distance between counter weight component 100 and the ground through the flexible supporting component 106 of second, and simultaneously, through the tail end that will become width of cloth subassembly 108 and set up at first flexible supporting component 102, make counter weight component 100 for automobile body 104 and ground position adjustment back, during the action of first flexible supporting component 102, can drive and become width of cloth subassembly 108 and change for the position of automobile body 104, and then can reduce the rope force, reduce the multiplying power of pulley 118 group among the subassembly 108 that becomes width of cloth, the reverse moment at main amplitude mast 110 is applyed in the increase, the arm condition of starting under the standard work condition has been improved. Through the stepless change of the working radius of the counterweight component 100, variable reverse torque can be provided for the engineering machinery such as a crane and the like needing to be applied with counterweight, the counterweight component is suitable for the requirements of different working states on the counterweight torque, the self-adaptive adjustment of the counterweight component 100 is realized, and meanwhile, larger torque can be provided for the engineering machinery such as the crane and the like under the same counterweight weight. In addition, dependence of the long boom raising arm on the super-raising mast and the super-raising stay bar is eliminated, the long boom raising arm under a standard working condition can be realized, the arm support dismounting efficiency is greatly improved, and the operation cost is reduced.

In the following, the hoisting device is exemplified by a crane.

With continued reference to fig. 1 to 5, the weight assembly 100 is used for adjusting a weight, in an embodiment of the present invention, the weight assembly 100 includes a first tray 124 and a second tray 128, wherein a main weight 126 is disposed on the first tray 124, and an installation space is formed on the first tray 124; the second tray 128 is provided in the installation space, and the second tray 128 is provided with a sub-weight 130.

As shown in fig. 2, the first tray 124 is used for carrying the primary weight 126, and the second tray 128 is used for carrying the secondary weight 130, it can be understood that the weight of the primary weight 126 is greater than that of the secondary weight 130.

When the crane lifts the arm, the main weight block 126, the second pallet 128 and the auxiliary weight block 130 can be lifted and suspended by the first pallet 124 at the same time, so that the maximum reverse moment can be exerted on the main amplitude mast 110 to satisfy the lifting. When the crane is hoisted, the first tray 124 and the second tray 128 can be separated, so that the crane can rotate with a counterweight, and the crane can operate in a narrow space.

When actually installing the weight assembly 100, the main weights 126 may be disposed at left and right sides of the first tray 124, and thus, an installation space for installing the second tray 128 and the sub-weights 130 may be formed between the left and right main weights 126. The assembly of the weight assembly 100 can be completed by disposing the second tray 128 in the installation space and disposing the auxiliary weight block 130 on the second tray 128.

As described above, in order to connect and disconnect the first tray 124 and the second tray 128, according to an embodiment of the present invention, the connecting pin 132 is provided between the second tray 128 and the first tray 124.

With continued reference to fig. 2, a connecting pin 132 is disposed between the first tray 124 and the second tray 128, i.e., it is understood that the first tray 124 and the second tray 128 can be connected by the connecting pin 132. When it is desired to separate the second tray 128 from the first tray 124, the connecting pins 132 need only be removed. Meanwhile, the connection between the first tray 124 and the second tray 128 is realized through the connecting pin 132, the connection structure between the first tray 124 and the second tray 128 is also simplified, and the disassembly and assembly efficiency between the first tray 124 and the second tray 128 is further improved.

According to one embodiment of the present invention, a hook 134 is provided on the second tray 128.

With continued reference to fig. 2, a hook 134 is further disposed on the second tray 128, and the first tray 124 and the second tray 128 can be suspended by disposing the hook 134 on the second tray 128. It can be understood that, when the first tray 124 and the second tray 128 are connected to each other, the hanging of the first tray 124 and the main weight 126 and the hanging of the second tray 128 and the sub weight 130 can be simultaneously achieved by the hanging of the hook 134, and when the first tray 124 and the second tray 128 are separated from each other, the hanging of the second tray 128 and the sub weight 130 can be achieved by the hanging of the hook 134.

The first telescopic support assembly 102 is connected to the counterweight assembly 100 and hinged to the vehicle body 104, and the first telescopic support assembly 102 is used for adjusting the relative distance between the vehicle body 104 and the counterweight assembly 100. As shown in fig. 3 and 4, the first telescopic support unit 102 is disposed substantially horizontally, the left end of the first telescopic support unit 102 is connected to the counterweight unit 100, and the right end of the first telescopic support unit 102 is connected to the vehicle body 104. As shown in fig. 5, when the first telescopic support unit 102 is extended, the distance between the counterweight unit 100 and the vehicle body 104 can be increased, and when the first telescopic support unit 102 is shortened, the distance between the counterweight unit 100 and the vehicle body 104 can be decreased. By so arranging, the working radius of the weight assembly 100 can be adjusted, that is, when the distance between the weight assembly 100 and the vehicle body 104 becomes large, the working radius of the weight assembly 100 becomes large in synchronization, and when the distance between the weight assembly 100 and the vehicle body 104 becomes small, the working radius of the weight assembly 100 becomes small in synchronization.

Referring to fig. 3 and 4, according to one embodiment of the present invention, the first telescoping support assembly 102 includes a first telescoping piece 112 and a mobile brace 114; wherein, the first end of the first telescopic member 112 is hinged to the vehicle body 104; the movable support rod 114 is connected to the second end of the first telescopic member 112, the weight component 100 is suspended from the movable support rod 114, and the amplitude variation component 108 is connected to one end of the movable support rod 114 far away from the first telescopic member 112.

As shown in fig. 5, in the embodiment of the present invention, the first telescopic element 112 may be an oil cylinder, an air cylinder, an electric cylinder, etc., and taking the oil cylinder as an example, the cylinder body portion of the oil cylinder is hinged to the vehicle body 104, the oil rod portion of the oil cylinder is connected to one end of the movable supporting rod 114, and the movable supporting rod 114 is used for hoisting the counterweight assembly 100. It will be appreciated that the movement of the movable brace 114 is synchronized as the first telescoping member 112 is extended or shortened, and thus the counter moment applied to the main luffing mast 110 can be adjusted to improve the jib lifting condition under standard operating conditions while also adjusting the working radius of the counterweight assembly 100. The adjustable working radius of the counterweight assembly 100 also means that a greater torque can be generated for the same counterweight weight to meet the stability requirements of the whole machine when the long arm is raised.

The first telescopic members 112 may be provided in a pair, and the pair of first telescopic members 112 is provided at intervals in the width direction of the vehicle body 104.

It should be noted that the above-mentioned hook 134 provided on the second tray 128 is adapted to be hooked on the movable stay 114.

A second telescoping support assembly 106 is connected between the weight assembly 100 and the vehicle body 104, the second telescoping support assembly 106 being used to adjust the relative distance between the weight assembly 100 and the ground. As shown in fig. 3 and 4, the second telescopic support assembly 106 is disposed in a substantially inclined state, and a left end of the second telescopic support assembly 106 is connected to the weight assembly 100, for example, a left end of the second telescopic support assembly 106 may be connected to a connecting position of the hook 134 and the moving cross bar, and a right end of the second telescopic support assembly 106 is hinged to the vehicle body 104. The relative distance between the weight assembly 100 and the ground can be adjusted as the second telescoping support assembly 106 is lengthened or shortened. Meanwhile, by such an arrangement, the suspension state of the weight assembly 100 can be adjusted, that is, when the second telescopic support assembly 106 is extended, the weight assembly 100 can be suspended and suspended, and when the second telescopic support assembly 106 is shortened, the weight assembly 100 can be dropped.

Referring to fig. 3 and 4, according to one embodiment of the present invention, the second telescopic support assembly 106 includes a second telescopic member 116, a first end of the second telescopic member 116 is hinged to the vehicle body 104, and a second end of the second telescopic member 116 is connected to the movable stay 114.

In the embodiment of the present invention, the second telescopic element 116 may be an oil cylinder, an air cylinder, an electric cylinder, etc., and taking the oil cylinder as an example, the cylinder body part of the oil cylinder is hinged to the vehicle body 104, and the oil rod part of the oil cylinder is connected to the movable stay rod 114. It will be appreciated that the simultaneous operation of the weight assemblies 100 when the second extendable members 116 are extended or shortened effectively adjusts the levitated state of the weight assembly 100 by providing that the boom raising and suspension can be accomplished when the weight assembly 100 is in the levitated state and the adjustment of the weight assembly 100 can be accomplished when the weight assembly 100 is in the grounded state.

The pair of second extendable members 116 may be provided, and the pair of second extendable members 116 may be provided at intervals in the width direction of the vehicle body 104, and by providing such an arrangement, the weight assembly 100 and the first extendable support assembly 102 can be stably supported.

According to an embodiment of the present invention, a third expansion element 122 is disposed between the movable brace 114 and the weight assembly 100.

Referring to fig. 4, in other embodiments, in order to adjust the state of the weight assembly 100, a third telescopic element 122 may be further disposed between the movable support rod 114 and the weight assembly 100, and it is understood that by disposing the third telescopic element 122, the control of the suspension or landing of the weight assembly 100 can be achieved by adjusting the third telescopic element 122. The third telescopic member 122 mentioned herein may be an oil cylinder, an air cylinder, an electric cylinder, etc.

Similarly, a pair of third telescopic members 122 may be provided, and the pair of third telescopic members 122 is provided at intervals in the width direction of the vehicle body 104, so that the stable adjustment of the weight assembly 100 can be realized.

When the third extensible member 122 is provided, the extensible lengths of the first extensible member 112 and the second extensible member 116 may not be adjusted, and the adjustment of the weight assembly 100 is achieved only by the operation of the third extensible member 122.

According to an embodiment of the present invention, a sleeve is sleeved on at least one of the first telescopic member 112 and the movable supporting rod 114.

The bending resistance of the corresponding structure can be improved by sleeving a sleeve on at least one of the first telescopic member 112 and the movable supporting rod 114.

Luffing assembly 108 is used to effect a connection between main luffing mast 110 and counterweight assembly 100. Referring to fig. 3 and 4, luffing assembly 108 includes a pulley 118 and a wire rope 120 according to an embodiment of the present disclosure; wherein, the pulley 118 is connected to an end of the movable supporting rod 114 far away from the first telescopic member 112; a cable 120 is connected between the pulley 118 and the main frame mast 110 of the carbody 104.

Through the arrangement, when the first telescopic support assembly 102 is telescopic, the position of the luffing assembly 108 relative to the vehicle body 104 can be driven to change, so that the angle of the main luffing mast 110 can be driven to change, or when the first telescopic support assembly 102 drives the position of the counterweight assembly 100 relative to the vehicle body 104 to change, the jib lifting condition under the standard working condition can be improved, meanwhile, the force application applied to the steel cable 120 can be reduced, and the multiplying power of the pulley 118 can be reduced.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. A hoisting device, comprising:

a weight assembly (100);

a first telescopic support assembly (102) adapted to be connected to the counterweight assembly (100) and hinged to a vehicle body (104) to adjust the relative distance between the counterweight assembly (100) and the vehicle body (104);

a second telescopic support assembly (106) adapted to be connected to said counterweight assembly (100) and hinged to said vehicle body (104) to adjust the relative distance between said counterweight assembly (100) and the ground;

a luffing assembly (108) connected between the trailing end of the first telescoping support assembly (102) and the main luffing mast (110).

2. The hoisting device of claim 1, wherein the first telescoping support assembly (102) comprises:

a first telescopic member (112), a first end of the first telescopic member (112) is hinged to the vehicle body (104);

and the movable support rod (114) is connected to the second end of the first telescopic part (112), the counterweight component (100) is hoisted to the movable support rod (114), and the amplitude variation component (108) is connected to one end, far away from the first telescopic part (112), of the movable support rod (114).

3. Hoisting device as claimed in claim 2, characterized in that the second telescopic support assembly (106) comprises a second telescopic member (116), a first end of the second telescopic member (116) being connected to the vehicle body (104) and a second end of the second telescopic member (116) being connected to the moving strut (114).

4. Hoisting device as claimed in claim 2, characterized in that the luffing assembly (108) comprises:

a pulley (118) connected to an end of the movable strut (114) remote from the first telescopic member (112);

a cable (120) connected between the pulley (118) and a main frame mast (110) of the carbody (104).

5. Hoisting device as claimed in claim 2, characterized in that a third telescopic member (122) is arranged between the moving strut (114) and the counterweight assembly (100).

6. Hoisting device as claimed in any one of the claims 2 to 5, characterized in that the counterweight assembly (100) comprises:

a first tray (124), wherein a main weight block (126) is arranged on the first tray (124), and an installation space is formed on the first tray (124);

a second tray (128) provided in the installation space, the second tray (128) being provided with a sub-weight block (130).

7. Hoisting device as claimed in claim 6, characterized in that a connecting pin (132) is provided between the second tray (128) and the first tray (124).

8. Hoisting device as claimed in claim 6, characterized in that a hook (134) is arranged on the second tray (128), said hook (134) being adapted to hook onto the moving strut (114).

9. Hoisting device as claimed in any one of the claims 2 to 5, characterized in that a sleeve is sleeved on at least one of the first telescopic element (112) and the moving strut (114).

10. The hoisting device as recited in any one of claims 1 to 5, wherein the first and second telescoping support assemblies are connected in two sets and in one-to-one correspondence, the two sets of first and second telescoping support assemblies being spaced apart along a width direction of the vehicle body (104).