CN216268884U - Lifting mechanism and vehicle - Google Patents

Abstract

The utility model provides a lifting mechanism and a vehicle, which belong to the technical field of vehicles and comprise a guide rail, a telescopic frame and a reversing driving device, wherein the telescopic frame is hinged with the guide rail through a rotating shaft, and the telescopic frame and the rotating shaft can slide back and forth along the guide rail and are contained in a rear baffle of a cargo box or are horizontally unfolded outside the rear baffle of the cargo box; the reversing driving device is connected with the rotating shaft and limited in the rear baffle of the cargo box; the reversing driving device drives the unfolded telescopic frame to rotate around the rotating shaft, and the goods placed on the telescopic frame are lifted. According to the lifting mechanism provided by the utility model, the guide rail is arranged in the rear baffle of the cargo box of the vehicle, the telescopic frame can be accommodated in the rear baffle of the cargo box, and a heavy object placed on the telescopic frame can be lifted to be in a horizontal state through the driving of the reversing driving device after being unfolded, so that the labor intensity of manual loading is reduced, the working efficiency is improved, and the loading and unloading cost is reduced.

Description

Lifting mechanism and vehicle

Technical Field

The utility model belongs to the technical field of automobiles, and particularly relates to a lifting mechanism and a vehicle.

Background

The pick-up truck has the characteristic of dual-purpose of passenger and goods, and the pick-up (pick-up) is a truck type which adopts a car head and a cab and is provided with an open type truck carriage. Its advantages are high comfortableness, no loss of power, and high load-bearing power. The pickup card can be used as a special vehicle, a multi-purpose vehicle, a public service vehicle, a business vehicle, a household vehicle, a cargo carrying vehicle, a tour vehicle, a taxi vehicle and the like.

However, when the pickup truck loads the goods, there are the following disadvantages;

the pick up type chassis is high, and the packing box part is mainly for loading goods, and it needs to consume a large amount of manpowers to move heavier goods to the packing box from ground. When the goods are heavy, a single person cannot load the goods, and the goods are loaded in a double lifting mode under the common condition, so that the lifting process consumes great manpower; although the loading and unloading operation can be completed by the aid of loading and unloading machines such as cranes, forklifts and the like, the loading and unloading operation must be completed manually under the condition of limited or lack of loading and unloading machines in places, so that the labor intensity is high, the working efficiency is low, the loading and unloading cost is high, and personal injury and cargo damage are easily caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a lifting mechanism which can realize time and labor saving of loading of goods and solve the problem of difficulty in loading of heavy objects.

In order to achieve the above purpose, the embodiment of the utility model adopts the following technical scheme:

in a first aspect, there is provided a lift mechanism comprising:

the guide rail is arranged in the rear baffle of the cargo box;

the telescopic frame is hinged with the guide rail through a rotating shaft, and the telescopic frame and the rotating shaft can slide along the guide rail in a reciprocating mode and are stored in the cargo box rear baffle or are horizontally unfolded outside the cargo box rear baffle; and

the reversing driving device is connected with the rotating shaft and limited in the cargo box rear baffle; the reversing driving device drives the expansion bracket which is unfolded to rotate around the rotating shaft, and goods placed on the expansion bracket are lifted.

In a possible implementation manner of the first aspect, the telescopic frame includes a primary telescopic assembly and a secondary telescopic assembly; the primary telescopic assembly comprises two primary telescopic rods and a primary supporting plate, the two primary telescopic rods are hinged with the rotating shaft and can slide along the guide rail, and the primary supporting plate is fixed between the two primary telescopic rods; the second grade telescopic part includes two second grade telescopic links, second grade layer board and safety plate, the second grade telescopic link with one-level telescopic link sliding connection, the second grade layer board is fixed in two between the second grade telescopic link, safety plate rotates through the round pin hub connection and is in the second grade telescopic link is kept away from the one end of one-level telescopic link, safety plate bearing in on the second grade layer board.

In a possible implementation manner of the first aspect, after the telescopic frame is stored, the safety plate, the secondary supporting plate and the primary supporting plate are stacked.

In a possible implementation manner of the first aspect, the primary supporting plate is located between the safety plate and the secondary supporting plate.

In a possible implementation manner of the first aspect, the secondary supporting plate is located below the primary supporting plate, and after the expansion frame is expanded, the secondary supporting plate is partially overlapped with the primary supporting plate.

In a possible implementation manner of the first aspect, the reversing driving device includes a motor and an executing component connected to the motor, and the motor drives the rotating shaft through the executing component with a degree of freedom of rotation of 90 °.

In a possible implementation manner of the first aspect, the actuating assembly includes a driving disc, a driven disc and two connecting rods, the driving disc is connected with the motor, the driven disc is connected with the rotating shaft, and two ends of the two connecting rods are eccentrically hinged to the driving disc and the driven disc, respectively.

In a possible implementation manner of the first aspect, the diameter of the driving disc is smaller than that of the driven disc, and the eccentricity of the connecting rod at the driving disc is smaller than that at the driven disc.

In a possible implementation manner of the first aspect, the actuating assembly further includes a master gear connected to the motor and a slave gear engaged with the master gear, the slave gear has a diameter larger than that of the master gear, and the driving disk is coaxially connected to the slave gear.

In a second aspect, an embodiment of the present invention provides a vehicle, where a hidden space is provided in a cargo box tailgate of the vehicle, and the lifting mechanism is installed in the hidden space.

The lifting mechanism provided by the utility model has the beneficial effects that: compared with the prior art, the lifting mechanism has the advantages that the guide rail is arranged in the rear baffle of the cargo box of the vehicle, the telescopic frame can be accommodated in the rear baffle of the cargo box, the telescopic frame can rotate downwards by a certain angle from a horizontal state through the driving of the reversing driving device after being unfolded, and the heavy objects arranged in the telescopic frame or the heavy objects connected with the telescopic frame are lifted to the horizontal state through the reversing driving device, so that the labor intensity of manual loading is reduced, the working efficiency is improved, and the loading and unloading cost is reduced.

The embodiment of the utility model provides a vehicle, because the lifting mechanism is arranged in the rear baffle of the cargo box of the vehicle, when a heavy object needs to be loaded, the telescopic frame can be unfolded and driven by the reversing driving device to load the heavy object into the cargo box, so that the loaded heavy object is feasible at any time and any place, the use is simple and convenient, and the time and the labor are saved; when the heavy object does not need to be loaded, the telescopic frame and the reversing driving device can be completely stored and hidden in the rear baffle of the cargo box and are completely integrated with the vehicle, the vehicle bearing space is not occupied, and the appearance of the whole vehicle is not influenced.

Drawings

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

Fig. 1 is a schematic perspective view of a first lifting mechanism according to an embodiment of the present invention;

fig. 2 is a schematic perspective view of a second lifting mechanism according to an embodiment of the present invention;

FIG. 3 is a schematic front view of a lifting mechanism according to an embodiment of the present invention;

FIG. 4 is a sectional view taken along line A-A of FIG. 3;

FIG. 5 is an exploded view of the lifting mechanism of the embodiment of the present invention;

fig. 6 is a schematic structural view of a vehicle employed in the embodiment of the present invention.

In the figure: 1. a guide rail; 11. a strip hole 11; 2. a telescopic frame; 21. a first-stage telescopic rod; 211. a guide groove; 22. a primary pallet; 23. a spring positioning pin; 24. a secondary supporting plate; 25. a secondary telescopic rod; 26. a security pane; 27. a pin shaft; 28. blocking strips; 29. positioning holes; 3. a commutation drive; 31. a protective case; 32. a motor; 33. a driven plate; 34. a slave gear; 35. a drive disc; 36. a connecting rod; 37. a main gear; 4. a rotating shaft; 5. a cargo box tailgate.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

As shown in fig. 1 to 6, one embodiment of the lifting mechanism comprises a guide rail 1 installed in a cargo box tailgate 5, an expansion bracket 2 and a reversing driving device 3, wherein the expansion bracket 2 is hinged with the guide rail 1 through a rotating shaft 4, the expansion bracket 2 and the rotating shaft 4 can slide back and forth along the guide rail 1 and are accommodated in the cargo box tailgate 5, or the expansion bracket 2 is horizontally unfolded outside the cargo box tailgate 5; the reversing driving device 3 is connected with the rotating shaft 4 and limited in the cargo box rear baffle 5; the reversing driving device 3 drives the unfolded telescopic frame 2 to rotate around the rotating shaft 4, and goods placed on the telescopic frame are lifted.

Compared with the prior art, the lifting mechanism provided by the utility model has the advantages that the guide rail 1 is arranged in the cargo box rear baffle 5 of the vehicle, the expansion bracket 2 can be accommodated in the cargo box rear baffle 5, the expansion bracket can rotate downwards for a certain angle from a horizontal state through the driving of the reversing driving device 3 after being unfolded, and the heavy object arranged on the expansion bracket 2 or the heavy object connected with the expansion bracket 2 is rotated and lifted to the horizontal state through the reversing driving device 3, so that the labor intensity of manual loading is reduced, the working efficiency is improved, and the loading and unloading cost is reduced.

The operation of the lifting mechanism is described below by way of example. Referring to fig. 6, in a normal state, the lifting mechanism is completely hidden in the cargo box tailgate 5, the two side flaps of the cargo box tailgate 5 limit the reversing driving device 3, and the telescopic frame 2 is slidably connected with the guide rail 1; the lower part of the cargo box rear baffle 5 is connected with the floor of the carriage through a hinge, two sides of the cargo box rear baffle 5 are connected with two sides of the carriage through a stay bar and a limiting pull rope, and the cargo box rear baffle 5 is positioned at the same level with the floor of the carriage after being opened so as to reduce the lifting height of the cargo; when goods are loaded, the rear baffle 5 of the goods box is firstly opened, the expansion bracket 2 is pulled out and unfolded, and then the expansion bracket 2 is driven by the reversing driving device 3 to rotate downwards to be in an inclined or vertical state; at the moment, the goods are placed on the telescopic frame 2, or the goods are fixed with the telescopic frame 2, and then the telescopic frame 2 is driven by the reversing driving device 3 to drive the goods to rotate and rise together until the telescopic frame 2 is in a horizontal state; the goods are lifted to be horizontal to the floor of the carriage through the lifting mechanism, so that the labor intensity required by manual lifting of the goods is avoided, then the goods can be pushed forwards, or the expansion bracket 2 is pushed into the rear baffle 5 of the carriage for storage, so that the goods move into the carriage, the labor intensity of loading the goods is further reduced, and the time-saving and labor-saving effects are achieved; after the goods are loaded, the telescopic frame is retracted, the telescopic frame is pushed into the rear baffle of the container along the guide rail, and the rotating shaft and the reversing driving device can move into the rear baffle of the container along with the telescopic frame.

Because the lifting mechanism and the vehicle are of an integrated structure, heavy goods can be loaded at any time and any place, hoisting equipment is not needed, and the lifting mechanism is simple and convenient to use.

The lifting mechanism can also be used for unloading goods, for example, the rear baffle 5 of the container is firstly opened, the expansion bracket 2 is pulled out, the goods are pushed or moved to the expansion bracket 2 of the lifting mechanism in the carriage, then the reversing driving device 3 is started, the expansion bracket 2 can be rotated downwards, the goods are lowered to the ground position or the proper height, and the goods can be easily unloaded.

As shown in fig. 1 to 5, an embodiment of the telescopic frame 2 of the above-mentioned feature may adopt a structure that the telescopic frame 2 includes a primary telescopic assembly and a secondary telescopic assembly; the primary telescopic assembly comprises two primary telescopic rods 21 and a primary supporting plate 22, the two primary telescopic rods 21 are hinged with the rotating shaft 4 and can slide along the guide rail 1, and the primary supporting plate 22 is fixed between the two primary telescopic rods 21; the flexible subassembly of second grade includes two second grade telescopic rods 25, second grade layer board 24 and safety plate 26, second grade telescopic rod 25 and 21 sliding connection of one-level telescopic rod, second grade layer board 24 is fixed in between two second grade telescopic rod 25, safety plate 26 rotates through round pin axle 27 and connects the one end of keeping away from one-level telescopic rod 21 at second grade telescopic rod 25, 24 bearings of second grade layer board are in safety plate 26's below.

The safety plate 26 of the embodiment rotates around the pin shaft 27 positively and negatively, is in a horizontal state after being unfolded, and is accommodated in the cargo box rear baffle 5 along with the expansion bracket 2 after being folded; set up to the second grade flexible, in considering that expansion bracket 2 need hide packing box backplate 5, packing box backplate 5 itself highly is not high, and the telescopic link that sets up is more, and the reliability that bears is poor, and has increased the complexity of structure, and the practicality is relatively poor.

Of course, in theory, more stages of scalability may be provided, such as three stages of scalability. Through the flexible of expansion bracket 2, can realize the loading demand of co-altitude.

In the above embodiment, the primary supporting plate 22 and the secondary supporting plate 24 are arranged, so that when the cargo is lifted to the same height as the floor of the car, the cargo needs to be supported, the cargo is pushed forward along the primary supporting plate 22, or the cargo needs to be manually conveyed into the car, and the cargo and the manual work need to be supported; the safety plate 26 is used as a rotating part, when the telescopic frame 2 rotates to a goods loading state, the safety plate 26 is rotated and unfolded, so that goods can be placed on the safety plate 26, the goods can be prevented from falling off in the lifting process, the harm to a human body caused by the falling of the goods is avoided, and unsafe factors during the goods loading are reduced; when the goods rises to the level, safety plate 26 slopes gradually in the rising process, and the goods slides down on secondary layer board 24 along safety plate 26, and secondary layer board 24 realizes the support to the goods.

Referring to fig. 4, when the safety plate 26 is not opened, the safety plate 26 is stacked and supported on the secondary support plate 24, and the secondary support plate 24 supports and limits the safety plate 26.

Considering that the safety plate needs to bear goods after being unfolded, in order to improve the bearing capacity, reinforcing rods are respectively arranged between the two ends of the safety plate and the two-stage telescopic rods, one ends of the reinforcing rods are hinged to the two-stage telescopic rods, and the other ends of the reinforcing rods are hung on hanging rings arranged on the safety plate through hooks to form triangular supports (the embodiment is not shown in the figure).

In a modified embodiment of the telescopic frame 2, referring to fig. 1 to 5, after the telescopic frame is stored, the safety plate 26, the secondary support plate 24 and the primary support plate 22 are stacked. In this embodiment, the safety plate 26 may be either below the primary pallet 22 or above the primary pallet 22. When the expansion bracket is horizontally expanded, the safety plate 26, the secondary supporting plate 24 and the primary supporting plate 22 are not on the same horizontal plane, so that when the plates are stored along with the expansion bracket, the plates can be smoothly stored without mutual interference.

The upper and lower directions in this specification refer to the positional relationship of the respective members when the telescopic frame 2 is in the horizontal state.

In another modified embodiment of the telescopic frame 2, referring to fig. 1 to 5, after the telescopic frame 2 is stored, the primary support plate 22 is stacked between the safety plate 26 and the secondary support plate 24. In the expansion state of the expansion bracket 2, the secondary supporting plate 24 is also positioned at the lowest part, and because a rotating gap is needed between the safety plate and the primary supporting plate, the secondary supporting plate utilizes the gap, so that the structure between the plates is compact, and the space is saved.

As a modified embodiment of the telescopic frame 2, as shown in fig. 1 to 5, the secondary pallet 24 is located below the primary pallet 22, and after the telescopic frame 2 is unfolded, the secondary pallet 24 and the primary pallet 22 have a partial overlap. The secondary supporting plate 24 plays a role in reinforcing the primary supporting plate 22, and the two supporting plates are reliably connected due to the overlapping of the secondary supporting plate 24 and the primary supporting plate 22, so that the reliability of bearing goods is improved.

In this embodiment, referring to fig. 4 and 5, since the secondary supporting plate 24 spans the primary telescopic rod and the secondary telescopic rod, and the secondary supporting plate and the primary telescopic rod have no fixed connection relationship, in order to facilitate the storage and hiding of the secondary supporting plate, the primary telescopic rod is provided with a guide groove 211 for the secondary supporting plate to move along with the secondary telescopic rod when being stored; in other embodiments, the overlapping part of the secondary supporting plate and the primary supporting plate can also reduce the width so as to facilitate the storage of the secondary supporting plate; the secondary supporting plate can also be of a secondary telescopic structure, and when the secondary supporting plate is stored, the overlapped part can be made into a telescopic plate to be stored in the secondary supporting plate or be stacked on the secondary supporting plate after being stored.

Regarding the fixing manner of the primary pallet 22 and the secondary pallet 24, the fixing manner given in this embodiment is as follows: in the first fixing mode, the primary supporting plate 22 and the secondary supporting plate 24 are welded with corresponding telescopic rods; in a second fixing mode, each telescopic rod is provided with a guide groove, and each supporting plate is correspondingly inserted into the telescopic rod; other fixing means can be adopted, and the present disclosure is not limited.

It should be noted that, as for the extension and retraction modes of the first-stage extension rod 21 and the second-stage extension rod 25, the extension and retraction mode of the existing common extension rod can be referred to. In the present embodiment, a positioning hole 29 is provided on the first-stage telescopic rod 21, and a spring positioning pin 23 is provided on the second-stage telescopic rod 25, so that when the spring positioning pin 23 moves in the first-stage telescopic rod 21, it is pressed by the first-stage telescopic rod 21, and when it is opposite to the positioning hole 29, it can pop up to lock and position.

After the telescopic frame 2 is hidden in the cargo box rear baffle 5, in order to avoid the exposure of the telescopic frame 2, a barrier strip 28 can be arranged at the outer end of the secondary telescopic rod 25, referring to fig. 1 to 5, when the telescopic frame 2 is hidden, the barrier strip 28 is combined with the cargo box rear baffle 5 into a whole in appearance, so that the integrity of the whole vehicle is improved; a hinged strip 28 may also be provided on the cargo box tailgate 5 to cover the strip 28 when the expansion bracket 2 is received within the hidden space of the cargo box tailgate 5. In this embodiment, the barrier strip 28 is only connected to the inner side of the end of the hidden space in a snap-fit manner, and the opening and closing are simple and convenient.

Referring to fig. 1 to 5, as an embodiment of the guide rail 1, the guide rail 1 is made of two square steel pipes and fixed to both left and right sides of a cargo box tailgate 5, and a long hole 11 through which a rotary shaft 4 slides is formed in an opposite inner side of the guide rail 1. The guide rails 1 are fixed in the cargo box tailgate 5 through bolts, or guide grooves are arranged on two sides in the cargo box tailgate 5 for installing the guide rails 1. The guide rail 1 can also be referred to an existing slide rail structure. Wherein, the first-stage telescopic rod 21 and the second-stage telescopic rod 25 adopt adaptive square steel tubes.

As an improved embodiment of the guide rail 1, referring to fig. 1 to 5, a box body can be further provided for the guide rail 1, specifically, the guide rail 1, the telescopic frame 2 and the reversing driving device 3 are all provided in the box body, the lifting mechanism has good integrity, and the damage to the telescopic frame 2, the motor 32 and other parts cannot be caused during transportation and installation; during installation, the box body is only required to be inserted into the hidden space in the rear baffle 5 of the container.

The lifting mechanism provided by the embodiment has the advantages of simple structure, easiness in manufacturing, low manufacturing cost and easiness in realization and popularization.

The outer end of the guide rail 1 is provided with an anti-slip structure for preventing the telescopic frame 2 from slipping off, and for example, a stopper, a hinge stopper, or the like may be provided.

As shown in fig. 1 to 6, the reversing driving device 3 includes a motor 32 and an actuating assembly connected to the motor 32, and the motor 32 drives the rotating shaft 4 to rotate forward and backward by 90 ° through the actuating assembly, so as to rotate the telescopic frame 2 from the horizontal state to the vertical state or from the vertical state to the horizontal state. The motor 32 is used for providing power to lift, so that time and labor are saved.

As a variant of the actuating assembly, referring to fig. 1 to 5, the actuating assembly comprises a driving disk 35, a driven disk 33 and two connecting rods 36, the driving disk 35 is connected with the motor 32, the driven disk 33 is connected with the rotating shaft 4, and two ends of the two connecting rods 36 are eccentrically hinged on the driving disk 35 and the driven disk 33 respectively. The actuating assembly of this embodiment, the principle that adopts eccentricity and connecting rod 36 to combine together, motor 32 drive driving-disc 35 rotatory, through connecting rod 36 of eccentric connection, drive driven disc 33 reciprocating rotation, turn into the positive and negative rotation of expansion bracket 2.

As another modified embodiment of the actuating assembly, referring to fig. 2 and 4, the diameter of the driving disc 35 is smaller than that of the driven disc 33, and the eccentricity of the connecting rod 36 on the driving disc 35 is smaller than that on the driven disc 33, so that the circular motion of the small disc of the driving disc 35 can be converted into the reciprocating motion of the large disc, and the reciprocating rotation of the telescopic frame 2 can be realized.

As another modified embodiment of the actuating assembly, referring to fig. 2 and 4, the actuating assembly further includes a master gear 37 connected to the motor 32 and a slave gear 34 engaged with the master gear 37, the slave gear 34 has a diameter larger than that of the master gear 37, and the driving disk 35 is coaxially connected to the slave gear 34. This embodiment has utilized gear drive's accuracy to set up through the size of gear diameter, the speed reduction increases turns round the rotatory speed of rotation axis 4, thereby realizes 2 low rotational speed high moment of torsion reciprocating motions of expansion bracket, makes the goods steadily go up and down, realizes steady reliable loading.

Optionally, referring to fig. 1 to 5, the reversing driving device 3 further includes a protection box 31, the actuating component is installed in the protection box 31, the driving disk 35 rotates with the protection box 31, and the protection box 31 protects the actuating component.

As another embodiment of the executing assembly, gear transmission may also be directly adopted, specifically, the gear 34 is directly mounted on the rotating shaft 4, and the rotating shaft 4 is driven to rotate forward and backward by the forward and backward rotating motor 32, so as to realize forward and backward rotation of the telescopic frame 2, and convert the forward and backward rotation into the lifting of the goods by the telescopic frame 2.

An embodiment of the present invention provides a vehicle, and referring to fig. 6, a hidden space is provided in a cargo box tailgate 5 of the vehicle, and a lifting mechanism is installed in the hidden space. Because the lifting mechanism is arranged in the cargo box rear baffle 5 of the vehicle, when a heavy object needs to be loaded, the telescopic frame 2 can be unfolded and driven by the reversing driving device 3 to load the heavy object into the cargo box, so that the heavy object can be loaded at any time and any place, the use is simple and convenient, and the time and the labor are saved; when not needing to load the heavy object, can all accomodate expansion bracket 2 and switching-over drive arrangement 3 and hide in packing box backplate 5, integrate completely with the vehicle, do not occupy vehicle bearing space, do not also influence the outward appearance of whole car.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. A lift mechanism, comprising:

the guide rail (1) is arranged in a cargo box rear baffle (5);

the telescopic frame (2) is hinged with the guide rail (1) through a rotating shaft (4), and the telescopic frame (2) and the rotating shaft can slide back and forth along the guide rail (1) and are stored in the cargo box rear baffle (5) or the telescopic frame (2) is horizontally unfolded outside the cargo box rear baffle (5); and

the reversing driving device (3) is connected with the rotating shaft (4) and limited in the cargo box rear baffle (5); the reversing driving device (3) drives the expansion frame (2) to be unfolded to rotate around the rotating shaft (4) and lift goods placed on the expansion frame.

2. The lifting mechanism according to claim 1, characterized in that the telescopic frame (2) comprises a primary telescopic assembly and a secondary telescopic assembly;

the primary telescopic assembly comprises two primary telescopic rods (21) and a primary supporting plate (22), the two primary telescopic rods (21) are hinged to the rotating shaft (4) and can slide along the guide rail (1), and the primary supporting plate (22) is fixed between the two primary telescopic rods (21);

the flexible subassembly of second grade includes two second grade telescopic links (25), second grade layer board (24) and safety plate (26), second grade telescopic link (25) with one-level telescopic link (21) sliding connection, second grade layer board (24) are fixed in two between second grade telescopic link (25), safety plate (26) rotate through round pin axle (27) and connect and be in second grade telescopic link (25) are kept away from the one end of one-level telescopic link, safety plate (26) bearing in on second grade layer board (24).

3. The lifting mechanism according to claim 2, characterized in that the safety plate (26), the secondary pallet (24) and the primary pallet (22) are stacked after the telescopic frame (2) is received.

4. The lift mechanism of claim 3, wherein the primary pallet (22) is located between the safety plate (26) and the secondary pallet (24).

5. The lifting mechanism as claimed in claim 2, characterized in that the secondary pallet (24) is located below the primary pallet (22) and that the secondary pallet (24) has a partial overlap with the primary pallet (22) after the expansion bracket (2) has been deployed.

6. Lifting mechanism according to any of claims 1-5, characterized in that the reversing drive (3) comprises a motor (32) and an actuator assembly connected to the motor (32), via which actuator assembly the motor (32) drives the rotary shaft (4) with a degree of freedom of rotation of 90 °.

7. The lifting mechanism according to claim 6, characterized in that the actuating assembly comprises a driving disk (35), a driven disk (33) and two connecting rods (36), the driving disk (35) is connected with the motor (32), the driven disk (33) is mounted on the rotating shaft (4), and two ends of the two connecting rods (36) are eccentrically hinged on the driving disk (35) and the driven disk (33) respectively.

8. The lifting mechanism as claimed in claim 7, characterized in that the diameter of the drive disk (35) is smaller than the diameter of the driven disk (33), the eccentricity of the connecting rod (36) at the drive disk (35) being smaller than the eccentricity at the driven disk (33).

9. The lifting mechanism as claimed in claim 7, characterized in that the actuating assembly further comprises a master gear (37) connected to the motor (32) and a slave gear (34) engaging with the master gear, the slave gear (34) having a larger diameter than the master gear (37), the drive disk (35) being coaxially connected to the slave gear (34).

10. A vehicle characterized in that a concealed space is provided in a cargo box tailgate (5) of the vehicle, and a lifting mechanism according to any one of claims 1 to 9 is installed in the concealed space.

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