CN214299072U

CN214299072U - Material elevator

Info

Publication number: CN214299072U
Application number: CN202022810031.7U
Authority: CN
Inventors: 魏文勇; 余玮
Original assignee: Hubei Engineering University
Current assignee: Hubei Engineering University
Priority date: 2020-11-27
Filing date: 2020-11-27
Publication date: 2021-09-28
Anticipated expiration: 2030-11-27

Abstract

The utility model discloses a material lifting machine, which comprises a base, a supporting plate, a chain, a first chain wheel, a second chain wheel and a driving mechanism, wherein the upper end of the base is vertically provided with a bracket, the supporting plate is horizontally arranged and is arranged at the front side of the bracket in a sliding way, which can slide up and down along the bracket under the action of external force, the first chain wheel is rotatably arranged at the upper end of the bracket, the wheel shafts are horizontally distributed along the left-right direction, the second chain wheel is rotatably arranged on the base, the wheel shafts are horizontally distributed along the left-right direction, the driving mechanism is arranged on the base, the chain is in transmission connection with a second chain wheel, the middle of the chain is meshed with the first chain wheel, one end of the chain is connected with the supporting plate through a connecting assembly, a limiting part is arranged on one side, close to the second chain wheel, of the base, the other end of the chain is meshed with the second chain wheel under the action of the limiting part, and the driving mechanism can drive the second chain wheel to rotate so as to drive one end, far away from the second chain wheel, of the chain to drive the supporting plate to move up and down. Chain dismantlement and simple to operate, the maintenance of the chain of being convenient for.

Description

Material elevator

Technical Field

The utility model relates to a construction technical field specifically is a material lifting machine.

Background

The material lifter is a mechanical conveying device of a fixing device, is mainly suitable for continuous vertical lifting of powdery, granular and small materials, and lifting platforms for indoor construction are all small platforms at present.

Most indoor construction material promotes platform in the market at present adopts chain formula to promote the platform, but the structure of current chain formula promotion platform is all comparatively simple, and is great to the loss of its chain in daily long-time use, inconvenient change.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a conveniently change material hoist of chain.

A material lifting machine comprises a base, a supporting plate, a chain, a first chain wheel, a second chain wheel and a driving mechanism, wherein a support is vertically arranged at the upper end of the base, the supporting plate is horizontally arranged and is slidably mounted on the front side of the support, the supporting plate can slide up and down along the support under the action of external force, the first chain wheel is rotatably mounted at the upper end of the support, wheel shafts of the first chain wheel and the second chain wheel are horizontally distributed along the left-right direction, the second chain wheel is rotatably mounted on the base, the wheel shafts of the second chain wheel and the second chain wheel are horizontally distributed along the left-right direction, the driving mechanism is mounted on the base, the second chain wheel and the driving mechanism are both positioned on the rear side of the support, the driving mechanism is in transmission connection with the second chain wheel, the middle part of the chain is meshed with the first chain wheel, one end of the chain wheel is connected with the supporting plate through a connecting component, a limiting component is arranged on one side, close to the second chain wheel, on the base, the other end of the chain is meshed with the second chain wheel under the action of the limiting part, and the driving mechanism can drive the second chain wheel to rotate so as to drive one end, far away from the second chain wheel, of the chain to drive the supporting plate to move up and down.

Preferably, the driving mechanism comprises a driving assembly and a locking assembly, the driving assembly is provided with a power input end and a power output end, a mounting frame is arranged at the upper end of the base, the mounting frame is distributed at the rear side of the support, a wheel shaft of the second chain wheel is rotatably mounted on the mounting frame, the second chain wheel is coaxially and fixedly mounted on the wheel shaft, the driving assembly and the locking assembly are respectively mounted on the mounting frame, the power output end of the driving assembly is in transmission connection with the wheel shaft of the second chain wheel, the locking assembly is used for locking the driving assembly on the mounting frame, or unlocking the locking assembly, and the driving assembly can drive the second chain wheel to rotate under the action of external force.

Preferably, the driving assembly comprises a transmission shaft, a bevel gear and a transmission gear, the transmission shaft is horizontally and rotatably mounted on the mounting frame along the front-back direction, the bevel gear is coaxially and fixedly mounted on the transmission shaft, the transmission gear is coaxially and fixedly mounted on a wheel shaft of the second chain wheel, and is meshed with the bevel gear to form a power output end of the driving assembly, the transmission shaft forms a power input end of the driving assembly, and under the action of an external force, the transmission shaft rotates and drives the second chain wheel to rotate through the bevel gear and the transmission gear.

Preferably, the mounting bracket is of a hollow cuboid structure, the transmission shaft, the bevel gear and the transmission gear are all arranged in the mounting bracket, a through hole communicated with the inside of the mounting bracket is formed in the rear side wall of the mounting bracket, the rear end of the transmission shaft extends out of the mounting bracket through the through hole, and one end, far away from the supporting plate, of the chain penetrates through the upper end of the mounting bracket to extend into the mounting bracket and is meshed with the second chain wheel.

Preferably, the locking assembly comprises a trigger handle and a first elastic piece, a mounting cavity is arranged on the rear side wall of the mounting frame, the through hole is communicated with the inside of the mounting cavity, a strip-shaped hole communicated with the inside of the mounting cavity is arranged on the rear side wall of the mounting frame, a plurality of through holes radially penetrating the mounting cavity along the transmission shaft are arranged on the part of the transmission shaft in the mounting cavity, the through holes are uniformly distributed on the transmission shaft along the circumferential direction of the transmission shaft, a first lug and a second lug are arranged below the through hole in the front side of the mounting cavity, the second lug is arranged below the first lug, the upper end face of the second lug is an arc face, the rear side of the second lug protrudes out of the first lug, the trigger handle is vertically arranged in the mounting cavity and above the transmission shaft, and two ends of the first elastic piece are respectively connected and fixed with the inner wall of the mounting cavity and the trigger handle, the upper end of the trigger handle is bent backwards and extends out of the installation cavity through the strip-shaped hole, the lower end of the trigger handle is bent forwards, the upper end bent part of the trigger handle is pressed downwards under the action of external force, the trigger handle overcomes the elastic tension of the first elastic piece and moves downwards to penetrate any one of the through holes, the lower end bent part of the trigger handle is clamped at the lower end of the first lug, the transmission shaft is locked, or the upper end bent part of the trigger handle is continuously pressed downwards to the upper end, close to the transmission shaft, of the trigger handle, the lower end bent part of the trigger handle moves backwards under the action of the upper end face of the second lug, the external force is removed, the trigger handle moves to the return position under the action of the return force of the first elastic piece, and the transmission shaft is unlocked.

Preferably, a storage box with an open upper end is placed at the lower end in the mounting frame and is located below the second chain wheel, an opening is formed in the rear side of the mounting frame, and an openable or closable bin door is arranged at the opening of the mounting frame.

Preferably, the connecting assembly comprises a mounting groove, a second elastic element and two U-shaped elements, a T-shaped groove is formed in the upper end of the support plate, the mounting groove is fixedly mounted at one end of the chain close to the support plate, the notches of the mounting groove face downwards, the two U-shaped elements are respectively slidably mounted on two sides in the mounting groove and are distributed in the mounting groove along the length direction of the T-shaped groove at intervals, the openings of the two U-shaped elements are horizontally distributed and are far away from each other, the lower ends of the two U-shaped elements extend out of the mounting groove respectively, the second elastic element is arranged between the two U-shaped elements and is fixedly connected with the two U-shaped elements, under the action of external force, the two U-shaped elements overcome the elastic tension of the second elastic element and slide to be close to each other, the lower ends of the two U-shaped elements extend into the T-shaped groove, the external force is removed, and the two U-shaped elements move and are far away from each other under the action of the restoring force of the second elastic element, the lower ends of the two are respectively clamped in the T-shaped groove.

Chain dismantlement and simple to operate, the maintenance of the chain of being convenient for.

The above description is only an overview of the technical solution of the present invention, and in order to make the technical means of the present invention clearer and can be implemented according to the content of the description, the following detailed description is made with reference to the preferred embodiments of the present invention and accompanying drawings. The detailed description of the present invention is given by the following examples and the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without undue limitation to the invention. In the drawings:

fig. 1 is a front view of a material lifting machine according to an embodiment of the present invention;

FIG. 2 is an enlarged view taken at A in FIG. 1;

fig. 3 is an enlarged view at B in fig. 1.

The specific meanings of the reference numerals are:

1. a base; 11. a support; 12. a universal wheel; 13. a mounting frame; 14. a mounting cavity; 15. A first bump; 16. a second bump; 17. a storage box; 2. a support plate; 21. a T-shaped slot; 3. A chain; 4. a first sprocket; 5. a second sprocket; 6. a drive mechanism; 61. a drive assembly; 611. A drive shaft; 612. a bevel gear; 62. a locking assembly; 621. a trigger handle; 622. a first elastic member; 7. a connecting assembly; 71. mounting grooves; 72. a second elastic member; 73. a U-shaped piece.

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The principles and features of the present invention are described below in conjunction with the accompanying fig. 1-3, the examples given are intended to illustrate the present invention and are not intended to limit the scope of the invention. The invention is described in more detail in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become more fully apparent from the following description and appended claims. It should be noted that the drawings are in simplified form and are not to precise scale, and are provided for convenience and clarity in order to facilitate the description of the embodiments of the present invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1-3, an embodiment of the present invention is provided, in which the material elevator includes a base 1, a supporting plate 2, a chain 3, a first chain wheel 4, a second chain wheel 5 and a driving mechanism 6, a bracket 11 is vertically disposed at the upper end of the base 1, the supporting plate 2 is horizontally disposed and slidably mounted at the front side of the bracket 11, and can slide up and down along the bracket 11 under the action of external force, the first chain wheel 4 is rotatably mounted at the upper end of the bracket 11, and wheel shafts thereof are horizontally distributed along the left and right direction, the second chain wheel 5 is rotatably mounted on the base 1, and wheel shafts thereof are horizontally distributed along the left and right direction, the driving mechanism 6 is mounted on the base 1, and the second chain wheel 5 and the driving mechanism 6 are both located at the rear side of the bracket 11, the driving mechanism 6 is in transmission connection with the second chain wheel 5, the middle part of the chain 3 is engaged with the first chain wheel 4, and one end of the chain is connected with the supporting plate 2 through a connecting assembly 7, a limiting part is arranged on one side, close to the second chain wheel 5, of the base 1, the other end of the chain 3 is meshed with the second chain wheel 5 under the action of the limiting part, and the driving mechanism 6 can drive the second chain wheel 5 to rotate so as to drive the chain 3 to be far away from one end of the second chain wheel 5 to drive the supporting plate 2 to move up and down.

The limiting element may be a chain guiding slot, the chain guiding slot is disposed on one side of the second sprocket 5, and a notch of the chain guiding slot faces the second sprocket 5, the chain 3 passes through the chain guiding slot and then engages with the second sprocket 5, the limiting element may also be a limiting chain guiding assembly, the limiting chain guiding assembly is disposed on one side of the second sprocket 5, one end of the chain 3, which is far away from the first sprocket 4, engages with the second sprocket 5 and a sprocket on the limiting chain guiding assembly, so as to limit the chain 3 at a position where the chain engages with the second sprocket 5.

The material is placed on the supporting plate 2, the driving mechanism 6 drives the second chain wheel 5 to rotate to drive the chain 3 to move up and down with the connected end of the chain, so as to drive the chain 3 to move up and down with the connected end of the supporting plate 2, and further drive the supporting plate 2 to drive the material on the upper end of the supporting plate to lift.

When the chain 3 needs to be maintained, one end of the chain 3 detachably connected with the supporting plate 2 is removed, the driving mechanism 6 or manually drives the second chain wheel 5 to rotate and drives one end of the chain 3 close to the supporting plate 2 to move upwards, and after one end of the chain 3 close to the supporting plate 2 passes over the first chain wheel 4, the chain 3 falls on the supporting plate 2 under the action of gravity, so that the chain 3 can be detached and maintained;

when the chain 3 is installed, one end of the chain is connected with the supporting plate 2, the chain bypasses the first chain wheel 4 and is meshed with the first chain wheel, then the other end of the chain 3 penetrates through the limiting and chain guiding assembly and is close to the second chain wheel 5, the driving mechanism 6 or manually drives the second chain wheel 5 to rotate, so that the other end of the chain 3 is meshed with and tensioned by the second chain wheel 5, and the installation of the chain 3 is completed.

This application passes through first sprocket 4 with second sprocket 5 has realized 3 dismantlements of chain and installation, are convenient for 3's maintenance of chain, it is more convenient to use.

The lower end of the base 1 used in this embodiment has four universal wheels 12, and each universal wheel 12 has a brake, so that the base 1 can keep still in the process of lifting or discharging materials.

As shown in fig. 1, the support 11 in this embodiment is a gantry, and in other embodiments, the support 11 may be a frame structure having a rectangular parallelepiped shape and a hollow interior, so that the pallet 2 is kept horizontal during the process of lifting on the support 11.

Preferably, the driving mechanism 6 includes a driving assembly 61 and a locking assembly 62, the driving assembly 61 has a power input end and a power output end, the upper end of the base 1 is provided with a mounting bracket 13, the mounting bracket 13 is distributed at the rear side of the support 11, the axle of the second chain wheel 5 is rotatably mounted on the mounting bracket 13, the second chain wheel 5 is coaxially and fixedly mounted on the axle thereof, the driving assembly 61 and the locking assembly 62 are respectively mounted on the mounting bracket 13, the power output end of the driving assembly 61 is in transmission connection with the axle of the second chain wheel 5, the locking assembly 62 is used for locking the driving assembly 61 on the mounting bracket 13, or the locking assembly 62 is unlocked, and the driving assembly 61 can drive the second chain wheel 5 to rotate under the external force.

In another embodiment, the power input end of the driving assembly 61 can be in transmission connection with the power output end of the motor or can rotate under the manual action of a worker, and the material lifting machine is suitable for material lifting machines of different models.

One side of the mounting frame 13 departing from the second chain wheel 5 is provided with a handle, so that the base 1 can be moved conveniently.

Preferably, the driving assembly 61 includes a transmission shaft 611, a bevel gear 612 and a transmission gear, the transmission shaft 611 is horizontally and rotatably mounted on the mounting rack 13 in the front-back direction, the bevel gear 612 is coaxially and fixedly mounted on the transmission shaft 611, the transmission gear is coaxially and fixedly mounted on a wheel axle of the second sprocket wheel 5, and is engaged with the bevel gear 612 and forms a power output end of the driving assembly 61, the transmission shaft 611 forms a power input end of the driving assembly 61, and under the action of an external force, the transmission shaft 611 rotates and drives the second sprocket wheel 5 to rotate through the bevel gear 612 and the transmission gear.

The staff accessible drive assembly 61 manual drive the second sprocket 5 rotates, is applicable to the small-size material lifting machine of indoor use.

Preferably, the mounting frame 13 is a hollow rectangular parallelepiped structure, the transmission shaft 611, the bevel gear 612 and the transmission gear are all disposed in the mounting frame 13, a through hole penetrating through the rear side wall of the mounting frame 13 is disposed on the rear side wall of the mounting frame 13, the rear end of the transmission shaft 611 extends out of the mounting frame 13 through the through hole, and one end of the chain 3, which is far away from the supporting plate 2, penetrates through the upper end of the mounting frame 13 to extend into the interior of the mounting frame and is engaged with the second sprocket 5.

Drive assembly 61 sets up in mounting bracket 13, just chain 3 is kept away from the one end of layer board 2 by the upper end of mounting bracket 13 stretch into inside back again with the meshing of second sprocket 5 avoids drive assembly 61 exposes to be favorable to preventing that the staff is by the operation drive assembly 61 with chain 3 presss from both sides the wound.

Preferably, the locking assembly 62 includes a trigger handle 621 and a first elastic member 622, a mounting cavity 14 is provided on the rear side wall of the mounting frame 13, the through hole is communicated with the inside of the mounting cavity 14, a strip-shaped hole communicated with the inside of the mounting cavity 14 is provided on the rear side wall of the mounting frame 13, a plurality of through holes radially penetrating through the transmission shaft 611 are provided at a portion of the transmission shaft 611 located in the mounting cavity 14, the through holes are evenly distributed on the transmission shaft 611 along the circumferential direction thereof at intervals, a first bump 15 and a second bump 16 are provided below the through hole inside the front side of the mounting cavity 14, the second bump 16 is located below the first bump 15, the upper end surface of the second bump 16 is an arc surface, the rear side of the second bump 16 protrudes from the first bump 15, the trigger handle 621 is vertically provided in the mounting cavity 14 and located above the transmission shaft 611, the two ends of the first elastic member 622 are respectively connected and fixed with the inner wall of the installation cavity 14 and the trigger handle 621, the upper end of the trigger handle 621 is bent backwards and extends out of the installation cavity 14 through the strip-shaped hole, the lower end of the trigger handle 621 is bent forwards, the upper end bent part of the trigger handle 621 is pressed downwards under the action of external force, the trigger handle 621 overcomes the elastic tension of the first elastic member 622 to move downwards and pass through any one of the through holes, the lower end bent part of the trigger handle 621 is clamped at the lower end of the first bump 15, the transmission shaft 611 is locked, or the upper end bent part of the trigger handle 621 is continuously pressed downwards to the upper end close to the transmission shaft 611, the lower end bent part of the trigger handle 621 moves backwards under the action of the upper end surface of the second bump 16, the external force is removed, and the trigger handle 621 moves to the recovery position under the action of the first elastic member 622, the drive shaft 611 is unlocked.

The external force rotates the transmission shaft of the driving assembly 61 until any one of the through holes is aligned with the trigger handle 621, the external force overcomes the elastic tension of the first elastic member 622 to press the upper end bent portion of the trigger handle 621 downward, the lower end of the trigger handle 621 penetrates through the through hole to be close to the first protruding block 15, the trigger handle 621 continues to move downward, the lower end bent portion of the trigger handle 621 moves backward under the action of the first protruding block 15 until the lower end bent portion of the trigger handle 621 is located below the first protruding block 15, and the lower end bent portion of the trigger handle 621 is clamped at the lower end of the first protruding block 15 under the action of the restoring force of the first elastic member, so that the power input end of the driving assembly 61 is locked on the mounting frame 13;

when the supporting plate 2 needs to be driven to lift, an external force presses the upper end bending part of the trigger handle 621 downwards to be close to the transmission shaft 611, the lower end bending part of the trigger handle 621 is close to the second protruding block 16 and moves backwards under the action of the upper end surface of the second protruding block, and after the external force is removed, the trigger handle 621 moves to the original position under the action of the restoring force of the first elastic piece 622, so that the operation is convenient.

The lower end of the bending part at the lower end of the trigger handle 621 is an inclined plane, the upper end of the inclined plane inclines towards one side close to the support 11, so that the trigger handle 621 is sufficiently moved away from one side, close to the support 11, of the installation cavity 14 under the action of the inclined plane and the upper end of the second bump 16, and the lower end of the trigger handle 621 is smoothly released from clamping with the first bump 16.

Preferably, a storage box 17 with an open upper end is placed at the lower end in the mounting frame 13, the storage box 17 is located below the second chain wheel 5, an opening is formed in the rear side of the mounting frame 13, and an openable or closable bin door is arranged at the opening of the mounting frame 13.

Need right when the chain 3 is maintained, make the chain 3 with the layer board 2 is removed the back of being connected, chain 3 falls into under the effect of gravity in the receiver 17, the staff open the door again take out chain 3 can, convenient to use.

Preferably, the connecting assembly 7 includes a mounting groove 71, a second elastic member 72 and two U-shaped members 73, the upper end of the supporting plate 2 is provided with a T-shaped groove 21, the mounting groove 71 is fixedly mounted at one end of the chain 3 close to the supporting plate 2, the notches of the mounting groove face downward, the two U-shaped members 73 are respectively slidably mounted at two sides of the mounting groove 71 and are distributed at intervals along the length direction of the T-shaped groove 21 in the mounting groove 71, the openings of the two U-shaped members 73 are horizontally distributed and are away from each other, the lower ends of the two U-shaped members 73 respectively extend out of the mounting groove 71, the second elastic member 72 is disposed between the two U-shaped members 73 and is fixedly connected with the two U-shaped members, under the action of external force, the two U-shaped members 73 overcome the elastic tension of the second elastic member 72 to slide to be close to each other, and the lower ends of the two U-shaped members 73 extend into the T-shaped groove 21, when the external force is removed, the two U-shaped members 73 move and move away from each other under the restoring force of the second elastic member 72 until the lower ends of the two U-shaped members are respectively clamped in the T-shaped groove 21.

The staff need relieve chain 3 with during the connection of layer board 2, simultaneously with two U-shaped piece 73 orientation the mounting groove 71 is inside remove can, need connect chain 3 with during layer board 2, with two U-shaped piece 73 orientation is put into behind the inside removal of mounting groove 71T inslot back withdraw sell external force can, convenient operation. The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way; the present invention can be smoothly implemented by those skilled in the art according to the drawings and the above description; however, those skilled in the art should understand that changes, modifications and variations made by the above-described technology can be made without departing from the scope of the present invention, and all such changes, modifications and variations are equivalent embodiments of the present invention; meanwhile, any changes, modifications, evolutions, etc. of the above embodiments, which are equivalent to the actual techniques of the present invention, still belong to the protection scope of the technical solution of the present invention.

Claims

1. A material lifting machine is characterized by comprising a base (1), a supporting plate (2), a chain (3), a first chain wheel (4), a second chain wheel (5) and a driving mechanism (6), wherein a support (11) is vertically arranged at the upper end of the base (1), the supporting plate (2) is horizontally arranged and is slidably mounted at the front side of the support (11), the supporting plate can slide up and down along the support (11) under the action of external force, the first chain wheel (4) is rotatably mounted at the upper end of the support (11), wheel shafts of the first chain wheel and the second chain wheel are horizontally distributed along the left and right directions, the second chain wheel (5) is rotatably mounted on the base (1), the wheel shafts of the second chain wheel and the driving mechanism are horizontally distributed along the left and right directions, the driving mechanism (6) is mounted on the base (1), the second chain wheel (5) and the driving mechanism (6) are both located at the rear side of the support (11), and the driving mechanism (6) is in transmission connection with the second chain wheel (5), the middle part of chain (3) with first sprocket (4) meshing, and its one end pass through coupling assembling (7) with layer board (2) are connected, one side that is close to second sprocket (5) on base (1) is equipped with the locating part, the other end of chain (3) is in under the effect of locating part with second sprocket (5) meshing, actuating mechanism (6) can drive second sprocket (5) rotate, in order to drive chain (3) are kept away from the one end drive of second sprocket (5) layer board (2) reciprocate.

2. The material lifting machine as recited in claim 1, characterized in that the driving mechanism (6) comprises a driving assembly (61) and a locking assembly (62), the driving assembly (61) has a power input end and a power output end, a mounting frame (13) is provided at the upper end of the base (1), the mounting frame (13) is distributed at the rear side of the support (11), the axle of the second chain wheel (5) is rotatably mounted on the mounting frame (13), the second chain wheel (5) is coaxially and fixedly mounted on the axle thereof, the driving assembly (61) and the locking assembly (62) are respectively mounted on the mounting frame (13), the power output end of the driving assembly (61) is in transmission connection with the axle of the second chain wheel (5), and the locking assembly (62) is used for locking the driving assembly (61) on the mounting frame (13), or the locking component (62) releases the locking, and the driving component (61) can drive the second chain wheel (5) to rotate under the action of external force.

3. The material lifting machine as claimed in claim 2, characterized in that the driving assembly (61) comprises a transmission shaft (611), a bevel gear (612) and a transmission gear, the transmission shaft (611) is horizontally and rotatably mounted on the mounting frame (13) in the front-back direction, the bevel gear (612) is coaxially and fixedly mounted on the transmission shaft (611), the transmission gear is coaxially and fixedly mounted on a wheel shaft of the second chain wheel (5) and meshed with the bevel gear (612) to form a power output end of the driving assembly (61), the transmission shaft (611) forms a power input end of the driving assembly (61), and under the action of external force, the transmission shaft (611) rotates and drives the second chain wheel (5) to rotate through the bevel gear (612) and the transmission gear.

4. The material lifting machine as claimed in claim 3, characterized in that the mounting frame (13) is a rectangular parallelepiped structure with a hollow interior, the transmission shaft (611), the bevel gear (612) and the transmission gear are all arranged in the mounting frame (13), a through hole penetrating the interior of the mounting frame (13) is arranged on the rear side wall of the mounting frame (13), the rear end of the transmission shaft (611) extends out of the mounting frame (13) from the through hole, and one end of the chain (3) far away from the supporting plate (2) penetrates through the upper end of the mounting frame (13) to extend into the interior of the mounting frame and is meshed with the second chain wheel (5).

5. The material lifting machine as claimed in claim 4, characterized in that the locking assembly (62) comprises a trigger handle (621) and a first elastic member (622), a mounting cavity (14) is provided on the rear sidewall of the mounting frame (13), the through hole is communicated with the inside of the mounting cavity (14), a strip-shaped hole communicated with the inside of the mounting cavity (14) is provided on the rear sidewall of the mounting frame (13), a plurality of through holes radially penetrating the mounting cavity (14) are provided on the portion of the transmission shaft (611) located in the mounting cavity (14), the through holes are uniformly distributed on the transmission shaft (611) along the circumferential direction of the transmission shaft, a first bump (15) and a second bump (16) are provided below the through hole inside the front side of the mounting cavity (14), and the second bump (16) is located below the first bump (15) and the upper end surface thereof is an arc surface, the rear side of the second bump (16) protrudes out of the first bump (15), the trigger handle (621) is vertically arranged in the installation cavity (14) and located above the transmission shaft (611), two ends of the first elastic member (622) are respectively connected and fixed with the inner wall of the installation cavity (14) and the trigger handle (621), the upper end of the trigger handle (621) bends backwards and extends out of the installation cavity (14) through the strip-shaped hole, the lower end of the trigger handle bends forwards, the upper end bent part of the trigger handle (621) is pressed downwards under the action of external force, the trigger handle (621) overcomes the elastic tension of the first elastic member (622) to move downwards and penetrate through any one of the through holes, the lower end bent part of the trigger handle is clamped at the lower end of the first bump (15), the transmission shaft (611) is locked, or the upper end bent part of the trigger handle (621) is continuously pressed downwards to the upper end of the trigger handle (621) close to the transmission shaft (611), the lower end bending part of the trigger handle (621) moves backwards under the action of the upper end face of the second bump (16) to cancel external force, the trigger handle (621) moves to the return position under the action of the return force of the first elastic piece (622), and the transmission shaft (611) is unlocked.

6. The material lifting machine as claimed in claim 4, characterized in that a storage box (17) with an open upper end is placed at the lower end in the mounting frame (13), the storage box (17) is located below the second chain wheel (5), an opening is formed in the rear side of the mounting frame (13), and an openable or closable door is formed in the opening of the mounting frame (13).

7. The material lifting machine as claimed in any one of claims 1 to 6, characterized in that the connecting assembly (7) comprises a mounting groove (71), a second elastic member (72) and two U-shaped members (73), the upper end of the supporting plate (2) is provided with a T-shaped groove (21), the mounting groove (71) is fixedly mounted at one end of the chain (3) close to the supporting plate (2) with its notch facing downward, the two U-shaped members (73) are respectively slidably mounted at two sides in the mounting groove (71) and are spaced apart in the mounting groove (71) along the length direction of the T-shaped groove (21), the openings of the two U-shaped members (73) are horizontally distributed and far away from each other, the lower ends of the two U-shaped members respectively extend out of the mounting groove (71), the second elastic member (72) is arranged between the two U-shaped members (73) and is fixedly connected with the two U-shaped members, under the action of external force, the two U-shaped parts (73) overcome the elastic tension of the second elastic part (72) and slide to be close to each other, the lower ends of the two U-shaped parts (73) extend into the T-shaped groove (21), the external force is removed, the two U-shaped parts (73) move and are far away from each other under the action of the restoring force of the second elastic part (72), and the lower ends of the two U-shaped parts are clamped in the T-shaped groove (21) respectively.