CN113562388B

CN113562388B - Cargo lifting device and cargo lifting method

Info

Publication number: CN113562388B
Application number: CN202010357691.6A
Authority: CN
Inventors: 郑宇鹏; 冷先锋; 苗延超; 王黎毅
Original assignee: Beijing Jingdong Zhenshi Information Technology Co Ltd
Current assignee: Beijing Jingdong Zhenshi Information Technology Co Ltd
Priority date: 2020-04-29
Filing date: 2020-04-29
Publication date: 2023-05-09
Anticipated expiration: 2040-04-29
Also published as: CN113562388A

Abstract

The invention discloses a cargo lifting device and a cargo lifting method, and belongs to the technical field of logistics transportation. The cargo lifting device includes: two support plates; the telescopic mechanism is connected between the two supporting plates, and the angle between the telescopic mechanism and the supporting plates is adjustable; and the control mechanism is used for controlling the telescopic mechanism to stretch and retract. According to the invention, the two support plates are used for supporting the goods before and after lifting, and lifting operation of the goods is completed by controlling the expansion and contraction of the expansion mechanism; the goods lifting device is simple in structure, safe and reliable, and the goods lifting operation is simple and convenient, can effectively liberate hands of a distributor, reduces labor cost and shortens distribution timeliness, and can avoid damage to the goods during manual carrying.

Description

Cargo lifting device and cargo lifting method

Technical Field

The invention relates to the technical field of logistics transportation, in particular to a cargo lifting device and a cargo lifting method.

Background

Along with the rapid development of logistics transportation, each big logistics enterprise adopts a mode of 'goods are sent to home' to better serve customers, and especially when the customers purchase big articles, multiple articles or heavier articles, the satisfaction degree of the customers can be remarkably improved by sending the goods to home, and the brand image is further improved. Typically, a dispatcher often uses a cart to load large items of cargo and transport it to home via the building's elevator. However, for old communities without elevators or when building elevators cannot be used normally, the dispatcher can only carry out manual transportation by climbing stairs, so that not only is the labor cost increased, but also the delivery time prolonged, and damage to goods is likely to occur in the manual transportation process, thereby increasing the risk of reimbursement

For this reason, there is a need to provide a cargo lifting device and a cargo lifting method for solving the above problems.

Disclosure of Invention

An object of the embodiments of the present invention is to provide a cargo lifting device and a cargo lifting method thereof, which can reduce labor cost, shorten distribution time and protect cargoes from being damaged in the distribution process.

To achieve the purpose, the invention adopts the following technical scheme:

a cargo lifting device comprising:

two support plates;

the telescopic mechanism is connected between the two supporting plates, and the angle between the telescopic mechanism and the supporting plates is adjustable;

and the control mechanism is used for controlling the telescopic mechanism to stretch and retract.

As an alternative to the cargo lifting device, the telescopic mechanism includes:

a conveyor belt;

the conveying belt is wound on the driven wheel and then wound on the driving wheel; the winding state of the conveying belt on the driving wheel is changed, so that the conveying belt is always in a tight state;

the telescopic rod is arranged between the driving wheel and the driven wheel, and the distance between the driving wheel and the driven wheel is changed by the telescopic rod through the change of the length of the telescopic rod, so that the telescopic state and the telescopic length of the telescopic mechanism are changed.

As an alternative to the cargo lifting device, the telescopic mechanism further includes:

and the driving piece is used for driving the driving wheel to rotate.

As an alternative to the cargo lifting device, at least two telescopic mechanisms are arranged at intervals.

As an alternative of the cargo lifting device, one end of the supporting plate is connected with the telescopic mechanism, and the other end is provided with a handle; the bottom of the supporting plate is provided with a universal wheel.

As an alternative scheme of the cargo lifting device, the telescopic mechanism is connected with each supporting plate through a connecting piece, and the supporting plates are rotatably arranged on the connecting pieces; the two ends of the telescopic rod are respectively connected with one connecting piece.

As an alternative to the cargo lifting device, the conveyor belt is a crawler belt; the driving wheel and the driven wheel are both of a gear structure.

As an alternative of the cargo lifting device, the connecting piece is further provided with a supporting wheel, and the supporting wheel is abutted to the inner side surface of the conveying belt so as to support the conveying belt.

A cargo lifting method using the cargo lifting device according to any one of the above, comprising the steps of:

the angles of the two support plates relative to the telescopic mechanism are adjusted so that the support surfaces of the two support plates face upwards and are respectively positioned at different heights, and cargoes are positioned on the support plates at the lower part;

extending the telescopic mechanism to raise the support plate at a height;

fixing the support plate at the height;

the telescopic mechanism is contracted to raise the support plate at the lower position.

As an alternative to the cargo lifting method, the method further comprises the steps of:

and adjusting the angle of the telescopic mechanism relative to the supporting plate at the high position so as to enable the goods to fall onto the supporting plate at the high position.

The embodiment of the invention has the beneficial effects that:

the two support plates are used for supporting the goods before and after lifting, and lifting operation of the goods is completed by controlling the expansion and contraction of the expansion mechanism; the whole goods lifting device is simple in structure, safe and reliable, and the goods lifting operation is simple and convenient, can effectively liberate hands of a distributor, reduce labor cost and shorten distribution timeliness, and can also avoid the goods from being damaged during manual transportation.

Drawings

FIG. 1 is a schematic view of a cargo lifting device according to an embodiment of the present invention;

FIG. 2 is a side view of a cargo lifting device according to an embodiment of the invention;

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

FIG. 4 is a diagram showing a first use state of a cargo lifting device in a first stair section according to an embodiment of the present invention;

FIG. 5 is a second view of a cargo lifting device in a first flight according to an embodiment of the invention;

FIG. 6 is a third view of a cargo lifting device in a first flight according to an embodiment of the invention;

FIG. 7 is a diagram showing a cargo lifting device in a first landing stage according to an embodiment of the present invention;

FIG. 8 is a fifth view of a cargo lifting device in a first flight according to an embodiment of the invention;

FIG. 9 is a view showing a cargo lifting device in a second stair run according to an embodiment of the invention;

FIG. 10 is a second view of a cargo lifting device in a second section of a second stair according to an embodiment of the invention;

FIG. 11 is a third view of a cargo lifting device in a second section of a second stair according to an embodiment of the invention;

FIG. 12 is a fourth view of a cargo lifting device in a second stair run according to an embodiment of the invention;

FIG. 13 is a fifth view of a cargo lifting device in a second stair run according to an embodiment of the invention;

fig. 14 is a schematic view showing the structure of the handle of the support plate in the embodiment of the present invention.

In the figure:

100-cargo; 200-supporting plates; 300-telescoping mechanism;

201-a first support plate; 202-a second support plate;

21-universal wheels; 22-handle;

31-a conveyor belt; 32-a first driving wheel; 33-a second driving wheel; 34-driven wheel; 35-a telescopic rod; 36-a first driving member; 37-a second driver; 38-a connector; 39-supporting wheels;

231-a shrink button; 232-an elongated button.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the 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 invention, as 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 made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed", "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected or integrally connected; either mechanically or electrically. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.

The embodiment discloses a cargo lifting device. FIG. 1 is a schematic view of a cargo lifting device according to an embodiment of the present invention; fig. 2 is a side view of a cargo lifting device in accordance with an embodiment of the invention. Referring to fig. 1-2, the cargo lifting device includes:

two support plates 200;

the telescopic mechanism 300 is connected between the two support plates 200, and the angle between the telescopic mechanism 300 and the support plates 200 is adjustable;

and a control mechanism for controlling the expansion and contraction of the expansion and contraction mechanism 300.

The embodiment also provides a cargo lifting method using the cargo lifting device, which comprises the following steps:

the angles of the two support plates 200 relative to the telescopic mechanism 300 are adjusted so that the support surfaces of the two support plates 200 face upwards and are respectively positioned at different heights, and the goods 100 are positioned on the support plates 200 at the lower position;

extending the telescopic mechanism 300 to raise the support plate 200 at a high place;

a support plate 200 fixed at a high place;

the telescopic mechanism 300 is contracted to raise the support plate 200 at the lower position.

Since the angle between the telescopic mechanism 300 and the support plate 200 is adjustable, the cargo 100 can be transferred between the support plate 200 and the telescopic mechanism 300; further, the cargo lifting method further comprises the following steps:

the angle of the telescopic mechanism 300 with respect to the overhead support plate 200 is adjusted so that the cargo 100 falls onto the overhead support plate 200.

The cargo lifting device provided in this embodiment adopts two support plates 200 to support the cargo 100 before and after lifting, and completes the lifting operation of the cargo 100 by controlling the expansion and contraction of the expansion and contraction mechanism 300; the goods lifting device is simple in structure, safe and reliable, and simple and convenient in goods lifting operation, can effectively liberate hands of a distributor, reduces labor cost and shortens distribution time, and can prevent goods from being damaged during manual transportation.

When the cargo lifting device is particularly implemented on a stair, one of the two support plates 200 is placed on the bottom platform of the stair section, and the telescopic mechanism 300 stretches to drive the other support plate 200 to reach the top platform; the supporting plate 200 at the top end is kept motionless, and the telescopic mechanism 300 is contracted to drive the goods 100 to ascend together with the supporting plate 200 at the bottom until the goods 100 are transferred to the supporting plate 200 at the top end; the same way is adopted to go up and down the stairs, but the relative positions of the two support plates 200 are exchanged at this time, the support plate 200 originally positioned at the bottom end platform of the previous stairs extends to the top end platform of the next stairs along with the extension of the telescopic mechanism 300, and the support plate 200 originally positioned at the top end platform of the previous stairs is positioned at the bottom end platform of the next stairs; with this cyclic reciprocation, automatic transport of the cargo 100 on stairs is achieved.

Further, fig. 3 is a schematic structural view of a telescopic mechanism according to an embodiment of the present invention; referring to fig. 3, the telescopic mechanism 300 includes:

a conveyor belt 31;

the driving wheel and the driven wheel 34 are arranged at intervals along the conveying direction, and the conveying belt 31 is wound on the driving wheel after being wound on the driven wheel 34; by changing the winding state of the conveyor belt 31 on the driving wheel, the overall release length of the conveyor belt 31 can be changed to adapt to the telescopic state and the change of the telescopic length of the telescopic mechanism 300, so that the conveyor belt 31 is always in a tight state.

The telescopic rod 35 is arranged between the driving wheel and the driven wheel 34, and the telescopic rod 35 changes the distance between the driving wheel and the driven wheel 34 through the change of the length of the telescopic rod 35, so that the telescopic state and the telescopic length of the telescopic mechanism 300 are changed.

Since the telescopic mechanism 300 adopts the cooperation of the conveyor belt 31 and the telescopic rod 35 to realize the telescopic action, before the telescopic mechanism 300 contracts and lifts the support plate 200 at the lower position, the following steps are further included:

the angle of the telescopic mechanism 300 with respect to the lower support plate 200 is adjusted so that the cargo 100 falls onto the conveyor belt 31 of the telescopic mechanism 300.

I.e. the conveyor belt 31 is used to carry the goods 100 during upstairs; in this way, the weight of the cargo 100 can be shared by the conveying belt 31 in the process of lifting the lower supporting plate 200, so that the cargo 100 is prevented from being concentrated on the lower supporting plate 200, and the stability of the cargo 100 in lifting is enhanced; secondly, when the telescopic mechanism 300 is contracted in place, the goods 100 can be directly transferred onto the support plate 200 at the high position by the telescopic mechanism 300, so that the problem that the transfer failure or damage is caused by overlarge overturning amplitude of the goods 100 when the goods 100 are directly transferred onto the support plate 200 at the high position by the support plate 200 at the low position is avoided.

Alternatively, the driving wheel is provided with one, i.e. the conveyor belt 31 is fixed at one end and wound around the driving wheel after being wound around the driven wheel 34. In some other embodiments, as shown in fig. 3, two driving wheels, namely, a first driving wheel 32 and a second driving wheel 33 may be provided, and after the conveying belt 31 is wound on the driven wheel 34, one end of the conveying belt is wound on the first driving wheel 32, and the other end of the conveying belt is wound on the second driving wheel 33; the conveyor belt 31 is released or wound by the two driving wheels, so that the release speed or the retraction speed of the conveyor belt 31 can be increased remarkably, and the cargo lifting efficiency is improved. In the specific implementation, the rotation condition of the two driving wheels can be adaptively adjusted according to specific conditions, for example, one of the two driving wheels can be set to rotate, the other driving wheel is not rotated, the other driving wheel is a fixed end, and the condition is equivalent to the condition of setting one driving wheel; it is also possible to let both drive wheels release the conveyor belt 31 when the telescopic mechanism 300 is extended, and to take up only one drive wheel when the telescopic mechanism 300 is contracted.

Further, the telescopic mechanism 300 further includes: a first driving member 36 for driving the first driving wheel 32 to rotate; the second driving member 37 is configured to drive the second driving wheel 33 to rotate.

For convenience of description, referring to fig. 2, two support plates 200 are respectively provided as a first support plate 201 and a second support plate 202, a support surface of the first support plate 201 is provided as A1, and a support surface of the second support plate 202 is provided as A2; referring to fig. 3, the two drive wheels of the telescopic mechanism 300 are the first drive wheel 32 far from the stairs segment and the second drive wheel 33 near the stairs segment; FIG. 4 is a diagram showing a first use state of a cargo lifting device in a first stair section according to an embodiment of the present invention; FIG. 5 is a second view of a cargo lifting device in a first flight according to an embodiment of the invention; FIG. 6 is a third view of a cargo lifting device in a first flight according to an embodiment of the invention; FIG. 7 is a diagram showing a cargo lifting device in a first landing stage according to an embodiment of the present invention; FIG. 8 is a fifth view of a cargo lifting device in a first flight according to an embodiment of the invention; FIG. 9 is a view showing a cargo lifting device in a second stair run according to an embodiment of the invention; FIG. 10 is a second view of a cargo lifting device in a second section of a second stair according to an embodiment of the invention; FIG. 11 is a third view of a cargo lifting device in a second section of a second stair according to an embodiment of the invention; FIG. 12 is a fourth view of a cargo lifting device in a second stair run according to an embodiment of the invention; fig. 13 is a view showing a cargo lifting device in a second stair section according to an embodiment of the present invention. Referring to fig. 4-13, a specific use of the cargo lifting device is as follows:

s101: the cargo 100 is placed on A1 and moved to the bottom landing of the first landing section (refer to fig. 4); changing the relative angle of the telescopic mechanism 300 and the first support plate 201, so that the telescopic mechanism 300 sits on the first stair segment, the length of the telescopic rod 35 is extended, and at least one of the first driving wheel 32 and the second driving wheel 33 rotates to release the conveyor belt 31 (refer to fig. 5, fig. 5 illustrates the case that both driving wheels rotate), until the second support plate 202 reaches the top end of the first stair segment; the telescopic mechanism 300 extends to the extent that the whole first stair section is spanned;

s102: the angle of the second support plate 202 relative to the telescopic mechanism 300 is changed to enable the A2 to be located on the top platform of the first stair segment, and the second support plate 202 (refer to fig. 6) is fixed by manual stepping or other modes, so that the position of the driven wheel 34 is relatively fixed; the first support plate 201 rotates in a direction approaching the telescopic mechanism 300 to seat the cargo 100 on the conveyor belt 31 (refer to fig. 7);

s103: the length of the telescopic link 35 becomes short while one of the first driving wheel 32 and the second driving wheel 33 is stationary and the other is rotated reversely; or the two driving wheels rotate reversely to wind the conveying belt 31, the whole telescopic mechanism 300 contracts upwards, and then the first supporting plate 201 and the goods 100 are driven to ascend until reaching the top end of the first stair section; preferably, referring to fig. 8, the first driving wheel 32 is not moved, and the second driving wheel 33 is reversely rotated to maintain the rotation direction of the conveyor belt 31 to be consistent with the lifting direction of the cargo 100, reduce friction between the cargo 100 and the conveyor belt 31, and thus reduce lifting force;

s104: the angle of the telescopic mechanism 300 with respect to the second support plate 202 is changed to drop the cargo 100 onto A2; moving the entire cargo lifting device to bring the telescoping mechanism 300 closer to the second stair run (see fig. 9);

s105: changing the angle of the telescoping mechanism 300 relative to the second support plate 202 to enable the telescoping mechanism 300 to sit on a second stair run;

s106: the length of the telescopic link 35 is extended while at least one of the first driving pulley 32 and the second driving pulley 33 is rotated to release the conveyor belt 31 (refer to fig. 10, fig. 10 illustrates a case where both driving pulleys are rotated) until the first support plate 201 reaches the top end of the second stair section, at which time the telescopic mechanism 300 is extended to span the entire second stair section;

s107: the angle of the first supporting plate 201 relative to the telescopic mechanism 300 is changed, so that the A1 sits on the top platform of the second stair section, the first supporting plate 201 is fixed by manual stepping or other modes, and the positions of the two driving wheels are relatively fixed (refer to FIG. 11); the second support plate 202 rotates in a direction approaching the telescopic mechanism 300, and the cargo 100 sits on the conveyor belt 31 (refer to fig. 12);

s108: the length of the telescopic link 35 becomes short while one of the first driving wheel 32 and the second driving wheel 33 is stationary and the other is rotated reversely; or both driving wheels are reversely rotated to wind the conveyor belt 31, so that the telescopic mechanism 300 is contracted upwards (refer to fig. 13), and the second supporting plate 202 and the goods 100 are driven to ascend until reaching the top end of the second stair segment; preferably, referring to fig. 13, the second driving wheel 33 is not moved, and the first driving wheel 32 is reversely rotated to maintain the rotation direction of the conveyor belt 31 to be consistent with the lifting direction of the cargo 100, reduce friction between the cargo 100 and the conveyor belt 31, and thus reduce lifting force;

s109: the angle of the telescopic mechanism 300 with respect to the first support plate 201 is changed to allow the cargo 100 to fall again on A1; returning to the initial state in step S101;

s110: steps S101-S109 are repeated until the target floor is reached.

Further, referring to fig. 1, at least two telescopic mechanisms 300 are provided at intervals, so that stable support of the telescopic mechanisms 300 on the cargo 100 is ensured. In this embodiment, two telescopic mechanisms 300 are provided at intervals. Optionally, the conveyor belt 31 is a track; the tracks can ensure stable support of the cargo 100. Further alternatively, the drive and driven wheels 34 are both gear structures. Alternatively, the telescoping rod 35 is a hydraulic telescoping rod or a pneumatic telescoping rod.

Further, still referring to fig. 1, the bottom of the support plate 200 is provided with a universal wheel 21; one end of the supporting plate 200 is connected with the telescopic mechanism 300, and the other end is provided with the handle 22 for manual grasping so as to drag the whole cargo lifting device, and the telescopic mechanism is particularly suitable for the stage that the whole cargo lifting device needs to be turned and moved on platforms among different stairs, so that the telescopic mechanism 300 can be located on the next stairs. Further, fig. 14 is a schematic view of the structure of the handle of the support plate in the embodiment of the present invention; referring to fig. 14, an extension button 232 and a retraction button 231 may be provided on the handle 22 to transmit command operations for extension and contraction, enabling automatic execution of the extension and retraction of the retraction mechanism 300.

Further, referring to fig. 3, the telescopic mechanism 300 is connected with each supporting plate 200 through the connecting piece 38, and the supporting plates 200 are rotatably arranged on the connecting piece 38, so that the angle of the supporting plates 200 relative to the telescopic mechanism 300 can be adjusted. Further, two ends of the telescopic rod 35 are respectively connected with a connecting piece 38 to match the telescopic length change of the telescopic mechanism 300. Optionally, the support plate 200 is connected to the connector 38 by a folding pneumatic rod to adjust the angle between the support plate 20 and the telescoping mechanism 300. Further, the connecting piece 38 is further provided with a supporting wheel 39, and the supporting wheel 39 abuts against the inner side surface of the conveying belt 31 to support the conveying belt 31, so that the conveying belt 31 can still keep the conveying plane from collapsing as far as possible under a longer extension state.

It is to be understood that the above examples of the present invention are provided for clarity of illustration only and are not limiting of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.

Claims

1. A cargo lifting device, comprising:

two support plates (200);

the telescopic mechanism (300) is connected between the two support plates (200), and the angle between the telescopic mechanism (300) and the support plates (200) is adjustable;

a control mechanism for controlling the telescopic mechanism (300) to be telescopic;

the goods lifting device adopts two supporting plates (200) to support the goods (100) before and after lifting, and completes the lifting operation of the goods (100) by controlling the expansion and contraction of the expansion and contraction mechanism (300);

the telescopic mechanism (300) comprises:

a conveyor belt (31);

the conveying belt (31) is wound on the driven wheel (34) and then wound on the driving wheel; by changing the winding state of the conveyor belt (31) on the driving wheel, the conveyor belt (31) is always in a tense state;

the telescopic rod (35) is arranged between the driving wheel and the driven wheel (34), and the telescopic rod (35) changes the distance between the driving wheel and the driven wheel (34) through the change of the length of the telescopic rod, so that the telescopic state and the telescopic length of the telescopic mechanism (300) are changed.

2. The cargo lifting device according to claim 1, wherein the telescoping mechanism (300) further comprises:

and the driving piece is used for driving the driving wheel to rotate.

3. Cargo lifting device according to claim 1, characterized in that the telescopic mechanism (300) is provided with at least two at intervals.

4. The cargo lifting device according to claim 1, wherein one end of the supporting plate (200) is connected with the telescopic mechanism (300), and the other end is provided with a handle (22); the bottom of the supporting plate (200) is provided with a universal wheel (21).

5. The cargo lifting device according to claim 1, wherein the telescopic mechanism (300) is connected with each supporting plate (200) through a connecting piece (38), and the supporting plates (200) are rotatably arranged on the connecting pieces (38); the two ends of the telescopic rod (35) are respectively connected with one connecting piece (38).

6. The cargo lifting device according to claim 1, characterized in that the conveyor belt (31) is a track; the driving wheel and the driven wheel (34) are both in gear structures.

7. The cargo lifting device according to claim 5, wherein a supporting wheel (39) is further arranged on the connecting piece (38), and the supporting wheel (39) is abutted with the inner side surface of the conveying belt (31) so as to support the conveying belt (31).

8. A cargo lifting method using the cargo lifting device according to any one of claims 1 to 7, comprising the steps of:

adjusting the angle of the two support plates (200) relative to the telescopic mechanism (300) so that the support surfaces of the two support plates (200) face upwards and are respectively positioned at different heights, and the goods (100) are positioned on the support plates (200) at the lower part;

-extending the telescopic mechanism (300) to raise the support plate (200) at a high level;

-fixing the support plate (200) at the elevation;

-retracting the telescopic mechanism (300) to raise the support plate (200) at the lower position.

9. The cargo lifting method of claim 8, further comprising the step of:

-adjusting the angle of the telescopic mechanism (300) with respect to the support plate (200) at the elevation so that the load (100) falls onto the support plate (200) at the elevation.