阅读说明：本技术 一种卡车驾驶室通用吊装工装 (General hoisting tool for truck cab ) 是由 于志刚 谭涛 谭妍玮 于 2019-10-21 设计创作，主要内容包括：本发明属于驾驶室吊装工装技术领域,公开了一种卡车驾驶室通用吊装工装,包括吊具框架和对称的滑动连接在吊具框架两端的吊具本体,所述吊具本体包括与吊具框架滑动连接的安装板以及固定设置在安装板底部的抱具；所述吊具框架上设置有限位装置,所述限位装置用于对安装板进行限位；所述限位装置包括单向齿条、限位块和驱动机构；所述单向齿条设置在吊具框架上,并且单向齿条的延伸方向与安装板的移动方向平行。本发明可进行1480mm-2240mm间的距离调节,以使得能够对不同宽度的驾驶室进行吊装,具有较高的产品兼容性,而且能够在吊装驾驶室过程中可保证抱具限位不外张、稳固不晃动,操作方便、实用。(The invention belongs to the technical field of cab hoisting tools, and discloses a general hoisting tool for a truck cab, which comprises a hoisting tool frame and hoisting tool bodies symmetrically and slidably connected to two ends of the hoisting tool frame, wherein each hoisting tool body comprises a mounting plate slidably connected with the hoisting tool frame and a holding tool fixedly arranged at the bottom of the mounting plate; the hanger frame is provided with a limiting device, and the limiting device is used for limiting the mounting plate; the limiting device comprises a one-way rack, a limiting block and a driving mechanism; the one-way rack is arranged on the hanger frame, and the extending direction of the one-way rack is parallel to the moving direction of the mounting plate. The invention can adjust the distance between 1480mm and 2240mm, so as to hoist the cabs with different widths, has higher product compatibility, can ensure that the clamp is not outward-limited, stable and swayed in the process of hoisting the cabs, and has convenient and practical operation.)

1. The utility model provides a general hoist and mount frock of truck driver's cabin, includes the hoist body of the sliding connection at hoist frame both ends of hoist frame and symmetry, its characterized in that: the lifting appliance body comprises a mounting plate (4) connected with the lifting appliance frame in a sliding manner and a holding tool fixedly arranged at the bottom of the mounting plate (4); the hanger frame is provided with a limiting device, and the limiting device is used for limiting the mounting plate (4);

the limiting device comprises a one-way rack (9), a limiting block (8) and a driving mechanism; the one-way rack (9) is arranged on the hanger frame, and the extending direction of the one-way rack (9) is parallel to the moving direction of the mounting plate (4); a mounting hole is formed in the mounting plate (4) corresponding to the one-way rack (9), and a limiting block (8) capable of sliding up and down is connected in the mounting hole; one end of the limiting block (8) is provided with a limiting tooth part, and the limiting block (8) is meshed with the tooth surface of the one-way rack (9) through the limiting tooth part; the mounting plate (4) is provided with a driving mechanism connected with the limiting block (8), and the driving mechanism is used for driving the limiting block (8) to move up and down in the mounting hole.

2. The general hoisting tool in truck driver's cabin of claim 1, characterized in that: the driving mechanism comprises a lever mechanism (16), one end of a lever of the lever mechanism (16) is movably connected with the limiting block (8) through a connecting rod, and the other end of the lever is connected with a driving piece.

3. The general hoisting tool in truck driver's cabin of claim 2, characterized in that: the driving piece is a locking pull wire (15), and a wire passing hole is formed in the mounting plate (4); one end of the locking pull wire (15) is connected with the lever, and the other end of the locking pull wire (15) penetrates through the wire passing hole and extends downwards; and a return spring is arranged between the lever mechanism (16) and the lever rotating shaft.

4. The general hoisting tool for truck cabs according to any one of claims 1 to 3, characterized in that: the clamp comprises two L-shaped bearing beams (6) which are fixed at the bottoms of the mounting plates (4) in parallel, and a clamping plate (7) is arranged on each L-shaped bearing beam (6); a rotating shaft is arranged between the L-shaped bearing beams (6), and a vehicle door limiting piece (14) is rotatably connected to the rotating shaft.

5. The general hoisting tool in truck driver's cabin of claim 4, characterized in that: the vehicle door limiting part (14) is of an F-shaped structure.

6. The general hoisting tool in truck driver's cabin of claim 1, characterized in that: the lifting appliance frame comprises two lifting appliance cross beams (1) which are arranged in parallel and at intervals, and the two ends of the two lifting appliance cross beams (1) are fixedly connected through lifting appliance side beams (2); a lifting appliance stiffening beam (5) parallel to the lifting appliance boundary beam (2) is further arranged on the inner side of the lifting appliance cross beam (1), and a one-way rack (9) is arranged between the lifting appliance stiffening beam (5) and the adjacent lifting appliance boundary beam (2); the hanger is characterized in that a sliding rail (3) is arranged on the hanger beam (1), and two ends of the mounting plate (4) are connected to the sliding rail (3) of the beam through sliding blocks respectively.

7. The general hoisting tool in truck driver's cabin of claim 6, characterized in that: lifting lugs (13) are arranged at two ends of the lifting appliance cross beam (1), and lifting appliance isolation pads (12) are arranged at the bottoms of the two lifting appliance cross beams (1); two ends of the slide rail (3) are respectively provided with an anti-collision block (17); the lifting appliance spacer (12) and the anti-collision block (17) are both made of PU polyurethane materials.

8. The general hoisting tool in truck driver's cabin of claim 1, characterized in that: first support lugs (10) are respectively fixed at two ends of the bottom of the lifting appliance beam (1), and the first support lugs (10) are used for being connected with the L-shaped bearing beam (6) through limiting pins when a cab with the width of 3360mm is lifted; the inboard interval of first journal stirrup (10) is provided with second journal stirrup (11), second journal stirrup (11) are used for being connected with L shape carrier bar (6) through the spacer pin when the wide 2280 mm's of hoist and mount driver's cabin.

9. The general hoisting tool in truck driver's cabin of claim 6, characterized in that: the slide rail (3) adopts an LM linear rolling slide rail structure.

10. The general hoisting tool in truck driver's cabin of claim 6, characterized in that: the cross beam is 2500mm long C-shaped steel with the length of 63 x 40 x 6mm, and the side beam (2) and the reinforcing beam (5) of the lifting appliance are both 500mm long C-shaped steel with the length of 63 x 40 x 6 mm; the length of the one-way rack (9) is 625 mm.

Technical Field

The invention belongs to the technical field of cab hoisting tools, and particularly relates to a general hoisting tool for a truck cab.

Background

According to the requirements of the national new energy development, most of domestic host computer plants gradually transform new energy automobiles at present, and particularly, the light and micro-cards special for pure electric vehicles are developed most rapidly. In production practice, the fact that the production of multi-variety, small-batch and cross-vehicle type pure electric special vehicles is not suitable for being produced on a traditional vehicle mechanized assembly line and has the defect caused by production incompatibility.

Disclosure of Invention

The invention aims to provide a general hoisting tool for a truck cab, which solves the problems that the existing hoisting tool cannot hoist cabs with different widths and is easy to shake in the hoisting process.

The technical scheme adopted by the invention is as follows:

a general hoisting tool for a truck cab comprises a hoisting frame and hoisting bodies symmetrically and slidably connected to two ends of the hoisting frame, wherein each hoisting body comprises a mounting plate and a holding tool, the mounting plate is slidably connected with the hoisting frame, and the holding tool is fixedly arranged at the bottom of the mounting plate; the hanger frame is provided with a limiting device, and the limiting device is used for limiting the mounting plate;

the limiting device comprises a one-way rack, a limiting block and a driving mechanism; the unidirectional rack is arranged on the hanger frame, and the extending direction of the unidirectional rack is parallel to the moving direction of the mounting plate; the mounting plate is provided with a mounting hole corresponding to the one-way rack, and a limiting block capable of sliding up and down is connected in the mounting hole; one end of the limiting block is provided with a limiting tooth part, and the limiting block is meshed with the tooth surface of the one-way rack through the limiting tooth part; the mounting plate is provided with a driving mechanism connected with the limiting block, and the driving mechanism is used for driving the limiting block to move up and down in the mounting hole.

Furthermore, for better explaining the invention, the driving mechanism comprises a lever mechanism, one end of a lever of the lever mechanism is movably connected with the limiting block through a connecting rod, and the other end of the lever is connected with a driving piece.

Furthermore, for better explanation of the invention, the driving member is a locking stay wire, and the mounting plate is provided with a wire passing hole; one end of the locking stay wire is connected with the lever, and the other end of the locking stay wire penetrates through the wire passing hole and extends downwards; and a rotating shaft of the lever mechanism connected with the lever is provided with a return spring.

Furthermore, for better explaining the invention, the clamp comprises two L-shaped bearing beams which are fixed at the bottom of the mounting plate in parallel, and a clamping plate is arranged on each L-shaped bearing beam; and a rotating shaft is arranged between the L-shaped bearing beams, and a vehicle door limiting part is rotatably connected to the rotating shaft.

Further, for better explaining the present invention, the door stopper has an F-shaped structure.

Furthermore, for better explaining the invention, the hanger frame comprises two hanger beams which are arranged in parallel and at intervals, and two ends of the two hanger beams are fixedly connected through hanger boundary beams; a lifting appliance stiffening beam parallel to the lifting appliance boundary beam is further arranged on the inner side of the lifting appliance cross beam, and a one-way rack is arranged between the lifting appliance stiffening beam and the adjacent lifting appliance boundary beam; the hanger is characterized in that a sliding rail is arranged on the hanger beam, and two ends of the mounting plate are connected to the sliding rail of the beam through sliding blocks respectively.

Furthermore, for better illustration of the invention, the cross beam is 2500mm long 63 × 40 × 6mm C-shaped steel, and the side beam and the reinforcing beam of the sling are 500mm long 63 × 40 × 6mm C-shaped steel; the length of the one-way rack is 625 mm.

Further, for better explaining the invention, lifting lugs are arranged at two ends of the lifting appliance cross beam, and lifting appliance spacers are arranged at the bottoms of the two lifting appliance cross beams; two ends of the slide rail are respectively provided with an anti-collision block; the lifting appliance spacer and the anti-collision block are both made of PU polyurethane materials.

Furthermore, for better explanation of the invention, two ends of the bottom of the cross beam of the lifting appliance are respectively fixed with a first lug, and the first lugs are used for being connected with an L-shaped bearing beam through a limiting pin when a cab with the width of 3360mm is lifted; the inboard interval of first journal stirrup is provided with the second journal stirrup, the second journal stirrup is used for being connected with L shape carrier bar through the spacer pin when the wide 2280 mm's of hoist and mount driver's cabin.

Further, for better explaining the invention, the slide rail adopts an LM linear rolling slide rail structure.

The invention has the beneficial effects that:

(1) the holding tool can slide on the slide rail of the hoisting frame through the mounting plate, and can adjust the distance of 1480mm-2240mm, so that cabs with different widths can be hoisted, and the product compatibility is high.

(2) The suspension arms are in hard connection by adopting the hanger frame, so that the suspension arms cannot swing; through setting up stop device, operating personnel accessible locking is acted as go-between and is controlled lever mechanism's lever and drive the stopper for the stopper is relieved with the regulation of hoist and mount width with the meshing of one-way rack, and at the hoist and mount in-process, can make stopper and one-way rack mesh under reset spring's effect, mounting panel and locking device can not remove this moment, consequently can guarantee the locking device spacing not flare outward, firm not rocking, convenient operation, practicality hoist and mount driver's cabin in-process.

(3) According to the invention, the vehicle door limiting piece with the F-shaped structure is arranged on the holding tool, the vehicle door limiting piece can rotate around the rotating shaft, and the vehicle door can be clamped by the limiting part between the vehicle door limiting pieces in the hoisting process, so that the vehicle door cannot swing during hoisting, and the problem of vehicle door deformation or paint surface damage caused by collision with the lifting tool can be avoided.

(4) The lifting appliance isolation pad made of the PU polyester amine material can protect the top of the cab, so that the paint surface on the top of the cab cannot be damaged, and the integrity of a product in the lifting process is ensured.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic side view of the present invention;

FIG. 3 is a schematic elevation view of the present invention;

fig. 4 is an enlarged schematic view of a portion a of fig. 1.

In the figure: 1-spreader beam; 2-lifting appliance side beam; 3-a slide rail; 4-mounting a plate; 5-a spreader stiffening beam; 6-L-shaped carrier bar; 7-holding the plate; 8-a limiting block; 9-a one-way rack; 10-a first lug; 11-a second lug; 12-spreader spacers; 13-lifting lugs; 14-door stops; 15-locking pull wires; 16-a lever mechanism; 17-anti-collision block.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present invention, it should be noted that the indication of the orientation or the positional relationship is based on the orientation or the positional relationship shown in the drawings, or the orientation or the positional relationship which is usually placed when the product of the present invention is used, or the orientation or the positional relationship which is usually understood by those skilled in the art, or the orientation or the positional relationship which is usually placed when the product of the present invention is used, and is only for the convenience of describing the present invention and simplifying the description, but does not indicate or imply that the indicated device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, cannot be understood as limiting the present invention. Furthermore, the terms "first" and "second" are used merely to distinguish one description from another, 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 further noted that the terms "disposed" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, unless explicitly stated or limited otherwise; may be directly connected or indirectly connected through an intermediate. For those skilled in the art, the drawings of the above-mentioned terms in the embodiments of the present invention can be understood in specific situations, and the technical solutions in the embodiments of the present invention are clearly and completely described. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

The invention is further described with reference to the following figures and specific embodiments.

Referring to fig. 1-4, a general hoisting tool for a truck cab comprises a hoisting frame and hoisting bodies symmetrically and slidably connected to two ends of the hoisting frame, wherein each hoisting body comprises a mounting plate 4 slidably connected with the hoisting frame and a clamp fixedly arranged at the bottom of the mounting plate 4; the hanger frame is provided with a limiting device, and the limiting device is used for limiting the mounting plate 4;

the hoist frame is preferably rectangular frame, mounting panel 4 at its both ends slidable mounting hoist body, mounting panel 4 can remove along its length direction on the both ends of hoist frame, make the locking device who fixes in the bottom remove in the both ends of hoist frame in opposite directions simultaneously, thereby can hoist the driver's cabin to different widths in locking device moving range, and because the locking device is fixed to be set up in the locking device bottom, under stop device spacing state, can be better firm hoist and mount, can not produce and rock, the security of the hoist and mount of product has been improved.

The limiting device comprises a one-way rack 9, a limiting block 8 and a driving mechanism; the unidirectional rack 9 is arranged on the hanger frame, and the extending direction of the unidirectional rack 9 is parallel to the moving direction of the mounting plate 4; a mounting hole is formed in the mounting plate 4 corresponding to the one-way rack 9, and a limiting block 8 capable of sliding up and down is connected in the mounting hole; one end of the limiting block 8 is provided with a limiting tooth part, and the limiting block 8 is meshed with the tooth surface of the one-way rack 9 through the limiting tooth part; the mounting plate 4 is provided with a driving mechanism connected with the limiting block 8, and the driving mechanism is used for driving the limiting block 8 to move up and down in the mounting hole.

As shown in fig. 4, the unidirectional racks 9 are arranged below the mounting plate 4 at intervals, and are limited by the engagement of the limiting blocks 8 arranged on the mounting plate 4 and the unidirectional racks 9; the bottom of the limiting block 8 is provided with a limiting tooth part which is a tooth surface matched with the one-way rack 9, the top of the limiting block 8 is connected with a driving mechanism, and the driving mechanism is used for driving the limiting block 8 to move up and down in the mounting hole so as to enable the limiting block to be meshed with the one-way rack 9 for limiting or releasing limiting; the driving mechanism may be an electric push rod controlled by a wireless remote control module, or may be other mechanisms with the same function, and is not limited.

Further, as shown in fig. 4 and fig. 2, as a preferred option of different embodiments, the driving mechanism includes a lever mechanism 16, one end of a lever of the lever mechanism 16 is movably connected with the limiting block 8 through a connecting rod, and the other end of the lever is connected with a driving member.

The lever mechanism 16 comprises a mounting seat and a lever mounted through a rotating shaft, one end of the lever is connected with the driving piece and drives the lever to rotate through the driving piece, the other end of the lever is hinged with a connecting rod, one end, far away from the lever, of the connecting rod is hinged with the top of the limiting block 8, the lever is driven through the driving piece, the limiting block 8 can move up and down in a mounting hole of the mounting plate 4, and meshing limitation and limitation removal with the one-way rack 9 are achieved.

Further, as shown in fig. 1 and 4, as a preferred option of different embodiments, the driving member is a locking pull wire 15, and the mounting plate 4 is provided with a wire passing hole; one end of the locking stay wire 15 is connected with the lever, and the other end of the locking stay wire 15 passes through the wire passing hole and extends downwards; and a return spring is arranged between the lever mechanism 16 and the lever rotating shaft.

Locking stay 15's setting, the operating personnel of can being convenient for can be very convenient at the hoist and mount make stopper 8 remove with the meshing of one-way rack 9 through pulling locking stay 15, and remove the spacing width regulation that carries on between two locking device, again can be when not pulling locking stay 15, the spring action through reset spring can make lever drive stopper 8 move down and mesh with one-way rack 9 mutually, make mounting panel 4 and locking device can not remove, thereby realize the locking of locking device at the hoist and mount in-process, can guarantee that the locking device is spacing not open outward, stabilize not rock, and convenient operation, and is practical.

Further, as shown in fig. 1 and fig. 2, as a preference of different embodiments, the clamp includes two L-shaped carrier beams 6 fixed at the bottom of the mounting plate 4 in parallel, and a clamp plate 7 is disposed on the L-shaped carrier beams 6; a rotating shaft is arranged between the L-shaped bearing beams 6, and a vehicle door limiting part 14 is rotatably connected to the rotating shaft.

The two L-shaped bearing beams 6 are arranged at the bottom of the mounting plate 4 in parallel and fixedly, the holding plate 7 is arranged at the bottom ends of the two L-shaped bearing beams 6, and one end of the L-shaped bearing beam 6 provided with the holding plate 7 extends into the cab to be hoisted. The door stopper 14 is provided on the L-shaped carrier bar 6 via a rotation axis, can rotate around the rotation axis, and is used for stopping the door, preventing the door of the cab from swinging at will and causing the collision between the door and the hanger.

Further, as a preferable alternative embodiment, the door stopper 14 has an F-shaped structure.

As shown in fig. 3, the end of the door restraint 14 with the F-shaped structure, which is away from the rotating shaft, forms a restraint opening with a downward bayonet, and the door is locked by the restraint opening, so that the door can be well prevented from swinging randomly, and further prevented from colliding with a lifting appliance; because the door locating part 14 of F shape structure passes through the axis of rotation setting on L shape carrier bar 6 for the door spacing frame can remove along with the removal of locking device, and then can carry on spacingly to different width driver's cabin doors, moreover through convenient operation, only need with locating part and door card post or separation can, further improvement the practicality.

Further, as a preferred option of different embodiments, as shown in fig. 1, the spreader frame includes two spreader beams 1 arranged in parallel and at intervals, and two ends of the two spreader beams 1 are fixedly connected through spreader boundary beams 2; a lifting appliance stiffening beam 5 parallel to the lifting appliance boundary beam 2 is further arranged on the inner side of the lifting appliance cross beam 1, and a one-way rack 9 is arranged between the lifting appliance stiffening beam 5 and the adjacent lifting appliance boundary beam 2; the hanger is characterized in that a sliding rail 3 is arranged on the hanger beam 1, and two ends of the mounting plate 4 are connected to the sliding rail 3 of the beam through sliding blocks respectively.

The lifting appliance cross beams 1 are two in total and are parallel to each other, as shown in fig. 1, the lifting appliance side beams 2 are arranged 2 in total and are respectively and fixedly arranged at two ends of the lifting appliance cross beams 1. The lifting appliance stiffening beam 5 is also provided with two and is located the inboard of lifting appliance boundary beam 2, and one-way rack 9 spans between lifting appliance stiffening beam 5 and lifting appliance boundary beam 2. Through such setting up structure, can strengthen the bearing capacity at both ends, better hoist and mount that carry out the driver's cabin.

Further, as a preference of different embodiments, the cross beam is 2500mm long 63 × 40 × 6mm C-shaped steel, and the side beam 2 and the reinforcing beam 5 of the sling are 500mm long 63 × 40 × 6mm C-shaped steel; the length of the one-way rack 9 is 625 mm.

Further, as a preference of different embodiments, as shown in fig. 1, lifting lugs 13 are arranged at two ends of the spreader beam 1, and spreader spacers 12 are arranged at the bottoms of the two spreader beams 1; two ends of the slide rail 3 are respectively provided with an anti-collision block 17; the lifting appliance spacer 12 and the anti-collision block 17 are both made of PU polyurethane materials.

The lifting lugs 13 are 4 in total and are arranged on two ends of the lifting appliance beam 1 on the inner side of the lifting appliance stiffening beam 5 in pairs for lifting. The anti-collision block 17 is provided to limit the mounting plate 4 so that the mounting plate 4 can slide within a predetermined range. Through the arrangement of the lifting appliance spacer 12, the cab can avoid hard contact with the lifting appliance beam 1 during lifting so as to protect the top of the cab, so that the paint surface at the top of the cab cannot be damaged, the integrity of a product during the lifting process is ensured,

further, as shown in fig. 1, as a preferred option of different embodiments, first lugs 10 are respectively fixed at two ends of the bottom of the spreader beam 1, and the first lugs 10 are used for being connected with the L-shaped carrier bar 6 through limit pins when a cab with a width of 3360mm is hoisted; the inboard interval of first journal stirrup 10 is provided with second journal stirrup 11, second journal stirrup 11 is used for being connected with L shape carrier bar 6 through the spacer pin when the wide driver's cabin of 2280mm of hoist and mount.

When a 3360mm cab is hoisted, the clamp is moved to a position corresponding to the first support lug 10, and then the first support lug 10 is connected with the L-shaped carrier beam 6 through the limiting pin, so that the clamp can be positioned; when hoist and mount 2280 mm's driver's cabin, remove the position that corresponds second journal stirrup 11 with the locking device, then be connected second journal stirrup 11 and L shape carrier bar 6 through the spacer pin for the locking device can be comparatively accurate location, and the better hoists the driver's cabin of these two sizes, and is more convenient, practical.

Further, as a preferred option of different embodiments, the slide rail 3 adopts an LM linear rolling slide rail structure.

The slide rail 3 adopts an LM linear rolling slide rail structure, so that the noise is low and the slide is light and convenient. The length of the sliding rail 3 is 625mm, the effective stroke is 500mm, and the distance between the two-end holding tools can be adjusted within the range of 1480mm-2240 mm.

The working principle of the invention is as follows:

when the lifting tool is used, the lifting tool is rigidly connected with a lifting arm of a lifting device through a lifting lug 13, the lifting tool is controlled to be positioned right above a cab to be lifted through the lifting device, the L-shaped carrier beam 6 is positioned on two sides of the cab, the locking stay wire 15 is pulled at the moment to enable the limiting block 8 and the one-way rack 9 to be in a limiting release state, then the L-shaped carrier beam 6 is moved to enable one end provided with the holding plate 7 to extend into the cab, the locking stay wire 15 is loosened after the limiting block 8 is moved to the right position, the limiting block 8 is meshed with the one-way rack 9 to recover the limiting state, at the moment, the mounting plate 4 and the L-shaped carrier beam 6 are not movable, then the door is clamped through a door limiting part 14; when a cab with the width of 3360mm or 3360mm is hoisted, the L-shaped carrier beam 6 is moved to the position corresponding to the first support lug 10 and the second support lug 11, at the moment, one end with the holding plate 7 also just extends into the cab and extends to the position, and then the L-shaped carrier beam 6 is connected with the first support lug 10 or the second support lug 11 by the positioning pin so as to be hoisted.

The invention is not limited to the above alternative embodiments, and any other various forms of products can be obtained by anyone in the light of the present invention, but any changes in shape or structure thereof, which fall within the scope of the present invention as defined in the claims, fall within the scope of the present invention.