Upturning guiding lifting equipment

Abstract

The utility model discloses upturning guiding lifting equipment, which belongs to the technical field of lifting equipment and comprises a lifting machine body, a driving chain and a driver, the driving chain rotates along the track of the lifting machine body and is uniformly connected with a plurality of dish groups in a driving manner, and the driver is fixed on the lifting machine body and is connected with the driving chain in a driving manner. A guide wheel and a lower guide part are arranged at the lower feeding end of the lifting machine body, a rotating wheel is rotationally arranged on the bowl and dish set, the bowl and dish set turns over in a guiding mode along the periphery of the guide wheel when moving to the lower feeding end of the lifting machine body, and the rotating wheel is in rolling fit with the lower guide part so that guiding upturning reset of the bowl and dish set can be achieved. According to the structure, the dish group is in guide fit with the guide wheel, and the rotating wheel acts on the lower guide piece in a rolling manner, so that the problems of vibration, shaking, abnormal sound and the like during upturning and resetting of the dish group can be avoided, the rolling process between the rotating wheel and the lower guide piece is stable and smooth, blockage is avoided, and the service life of the dish group is prolonged. And driving can be completed only by a low-power driver.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting equipment, in particular to a lifting equipment with upward turning and guiding. Background Art

[0002] A bucket elevator is a continuous conveying machine that uses a series of buckets fixedly connected to an endless traction member to vertically lift materials. After the buckets perform the actions of lifting and turning downward, the lifting and discharging of materials can be completed. After the buckets turn downward, they need to turn upward and reset to prepare for receiving materials next time. In the prior art, the turning and resetting of the buckets usually use guide wheels. For example, a bucket elevator disclosed in the utility model patent with Chinese patent number CN202121794917.5. During its use, materials are loaded into the buckets at the feeding port and sequentially pass through the lower horizontal conveying section, the vertical conveying section, and the upper horizontal conveying section. When the buckets are conveyed to the first guide wheel, the limiting blocks on both sides of them are pressed against the first guide wheel. Then, the buckets are driven to turn 180 degrees to dump materials. After that, the limiting blocks slide into the chute, so that the openings of the buckets are always in the dumping state to ensure the thoroughness of dumping. Finally, after passing through the second guide wheel, the limiting blocks are not restricted, and the buckets automatically return to the state with the openings facing upward. However, the buckets are only turned and reset by the guide wheels, and obvious vibrations, shakes, and abnormal noises will occur during the whole turning and resetting process, resulting in poor working stability. Therefore, it is necessary to further improve. Summary of the Utility Model

[0003] The utility model aims to provide a lifting equipment with upward turning and guiding to overcome the deficiencies in the prior art.

[0004] A lifting equipment with upward turning and guiding designed according to this purpose includes a lifting body, a driving chain, and a driver. The driving chain rotates along the trajectory of the lifting body and is evenly and drivingly connected with a plurality of bowl sets. The driver is fixedly arranged on the lifting body and is drivingly connected with the driving chain. A guide wheel and a lower guiding member are arranged at the lower feeding end of the lifting body. A rotating wheel is rotatably arranged on the bowl set. When the bowl set moves to the lower feeding end of the lifting body, it is guided and turned along the periphery of the guide wheel. The rotating wheel rolls with the lower guiding member to realize the guiding and upward turning reset of the bowl set.

[0005] The guide wheel is rotatably arranged on the lifting body. The lower guiding member is arranged in a concave arc shape and is located below the guide wheel and is fixedly arranged on the lifting body.

[0006] A lower receiving member is provided on the lifting body, and the lower receiving member is fixedly arranged along the trajectory of the lifting body. The lower guiding member is located at the rear end of the lower receiving member. After the bowl and plate group is turned down at the lower feeding end of the lifting body, the rotating wheel receives and rolls along the trajectory of the lower receiving member, and then rolls along the trajectory of the lower guiding member.

[0007] The bowl and plate group includes a bowl and plate base and bowls and plates detachably installed on the bowl and plate base. The rotating wheel is rotatably arranged on the side of the bowl and plate base. When the bowl and plate group moves to the lower feeding end of the lifting body, the bowl and plate base is guided and turned over along the periphery of the guiding wheel, and the rotating wheel rolls along the trajectory of the lower guiding member.

[0008] A chain connecting shaft also extends from the side of the bowl and plate base and is drivingly connected to the driving chain through the chain connecting shaft.

[0009] A bowl and plate clamping plate, a clamping block, a clamping block rotating shaft, and a clamping lock separating member are provided on the bowl and plate base. The bowl and plate clamping plate is fixedly arranged on the bowl and plate base, and a clamping interface is formed between the two. One end of the clamping block is connected in cooperation with the clamping block rotating shaft and is rotatably arranged on the bowl and plate base through the clamping block rotating shaft. The bowl is clamped or detached from the clamping interface by the rotation of the clamping block. The other end of the clamping block is provided with a clamping portion. The clamping lock separating member is rotatably arranged on the bowl and plate base and is locked or separated from the clamping portion when rotating. A rotating acting member is also provided at the end of the clamping lock separating member.

[0010] A lifting guide rail is provided on the lifting body, and the lifting guide rail is fixedly arranged along the trajectory of the lifting body. A lifting rotating wheel is rotatably arranged on the bowl and plate base, and the lifting rotating wheel receives and rolls along the trajectory of the lifting guide rail.

[0011] The lifting guide rail has an upward turning supporting flange corresponding to the upward turning and resetting of the bowl and plate group. When the bowl and plate group moves to the lower feeding end of the lifting body, the lifting rotating wheel rolls on the upward turning supporting flange and then receives and rolls along the trajectory of the lifting guide rail.

[0012] A chain guide rail is provided on the lifting body. The chain guide rail has two sections, and the two sections of the chain guide rail are respectively fixedly arranged at intervals along the trajectory of the lifting body. A top driving gear and a bottom driving gear are respectively rotatably arranged at the discharging end and the lower feeding end of the lifting body. The top driving gear is located in front of the two sections of the chain guide rail, and the bottom driving gear is located behind the two sections of the chain guide rail. The driver is drivingly connected to the top driving gear or the bottom driving gear. The driving chain meshes with the top driving gear and the bottom driving gear and is guided and rotated along the trajectory of the two sections of the chain guide rail.

[0013] A top drive shaft and a bottom drive shaft are rotatably arranged on the lifting body. The top drive gear is connected to the top drive shaft in a mating manner. The guide wheel and the bottom drive gear are arranged on the same axis and are both connected to the bottom drive shaft in a mating manner. The driver is fixedly arranged at the discharging end of the lifting body and is drivingly connected to the top drive shaft.

[0014] The utility model drives the driving chain to rotate by the driver, and then drives a plurality of bowl and plate groups to move on the lifting body. When the bowl and plate group moves to the discharging end of the lifting body, it will turn down 180 degrees, so as to pour out the materials, so as to achieve the purpose of material lifting and conveying. In addition, a guide wheel and a lower guide member are arranged at the lower feeding end of the lifting body. When the bowl and plate group moves to the lower feeding end of the lifting body, the bowl and plate group will be guided and flipped in cooperation with the outer periphery of the guide wheel, and at the same time, the rotating wheel will roll on the lower guide member, so as to realize the upward turning and 180-degree reset of the bowl and plate group, so that the bowl and plate group can feed materials at the lower feeding end of the lifting body.

[0015] Since the bowl and plate group is guided and cooperated with the guide wheel and the rotating wheel rolls on the lower guide member, problems such as vibration, shaking and abnormal noise during the upward turning and reset of the bowl and plate group can be avoided, so as to improve the stability of the upward turning and reset of the bowl and plate group. Moreover, the rolling process between the rotating wheel and the lower guide member is stable, smooth and will not get stuck, and only a low-power driver is needed to complete the driving, which is energy-saving and environment-friendly and has low production cost. Description of the Drawings

[0016] Figure 1 It is a schematic assembly structure diagram of an embodiment of the utility model.

[0017] Figure 2 It is a schematic assembly structure diagram of another perspective of an embodiment of the utility model (the support feet are omitted).

[0018] Figure 3 It is Figure 2 The enlarged structure diagram at I in

[0019] Figure 4 It is a schematic exploded structure diagram of an embodiment of the utility model (the support feet are omitted).

[0020] Figure 5 It is Figure 4 The enlarged structure diagram at II in

[0021] Figure 6 It is a schematic top view structure diagram of an embodiment of the utility model.

[0022] Figure 7 It is Figure 6 The sectional structure diagram along the line X-X in

[0023] Figure 8 is Figure 7 the enlarged structure schematic diagram at position III in

[0024] Figure 9 is Figure 7 the enlarged structure schematic diagram at position IV in

[0025] Figure 10 the assembly structure schematic diagram of the bowl and plate set.

[0026] Figure 11 the assembly structure schematic diagram of the bowl and plate set from another perspective.

[0027] Figure 12 the disassembly schematic diagram of the bowl and plate in the bowl and plate set.

[0028] Figure 13 the disassembly structure schematic diagram of the bowl and plate set.

[0029] Figure 14 the disassembly structure schematic diagram of the bowl and plate set from another perspective. Specific embodiments

[0030] In order to make the above objects, features, and advantages of the present utility model more obvious and understandable, the following will describe the specific embodiments of the present utility model in detail with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present utility model. However, the present utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0031] The following will further describe the present utility model with reference to the accompanying drawings and embodiments.

[0032] Referring to Figures 1-14 , the upward turning guiding lifting device includes a lifting body 100, a driving chain, and a driver 10. The driving chain rotates along the trajectory of the lifting body 100 and is uniformly drivingly connected with a plurality of bowl and plate sets C. The driver 10 is fixedly arranged on the lifting body 100 and is drivingly connected with the driving chain. A guiding wheel 20 and a lower guiding member 21 are arranged at the lower feeding end of the lifting body 100. A rotating wheel C11 is rotatably arranged on the bowl and plate set C. When the bowl and plate set C moves to the lower feeding end of the lifting body 100, it is guided and turned over along the periphery of the guiding wheel 20, and the rotating wheel C11 is in rolling cooperation with the lower guiding member 21 to realize the guiding upward turning and resetting of the bowl and plate set C.

[0033] The present embodiment utilizes the driver 10 to drive the driving chain to rotate, thereby driving multiple bowl and plate groups C to move on the lifting body 100. When the bowl and plate group C moves to the unloading end of the lifting body 100, it will flip downward 180 degrees to pour out the material, so as to achieve the purpose of material lifting and transportation. In addition, a guide wheel 20 and a lower guide member 21 are provided at the lower feeding end of the lifting body 100. When the bowl and plate group C moves to the lower feeding end of the lifting body 100, the bowl and plate group C will cooperate with the outer guide flipping of the guide wheel 20, and will also use the rotating wheel C11 to roll on the lower guide member 21, so as to realize the guide of the bowl and plate group C to flip up 180 degrees and reset, so that the bowl and plate group C can load the material at the lower feeding end of the lifting body 100.

[0034] Since the bowl and plate group C is guided by the guide wheel 20 and the rotating wheel C11 rolls on the lower guide member 21, it is possible to avoid vibration, shaking, and abnormal noise when the bowl and plate group C is flipped up and reset, thereby improving the flipping and reset stability of the bowl and plate group C. In addition, the rolling process between the rotating wheel C11 and the lower guide member 21 is stable and smooth without any jamming. Only a low-power driver 10 is needed to complete the driving, which is energy-saving and environmentally friendly, and has a low production cost.

[0035] The guide wheel 20 is rotatably disposed on the lifting body 100 , and the lower guide member 21 is disposed in a concave arc shape and is located below the guide wheel 20 , and is fixedly disposed on the lifting body 100 .

[0036] A lower receiving member 22 is provided on the lifting body 100, and the lower receiving member 22 is fixedly arranged along the track of the lifting body 100. The lower guide member 21 is located at the rear end of the lower receiving member 22. After the bowl and plate group C is turned down at the lower feeding end of the lifting body 100, the rotating wheel C11 receives and rolls along the track of the lower receiving member 22, and then rolls along the track of the lower guide member 21.

[0037] In this embodiment, the lower receiving member 22 is fixedly arranged along the bottom edge track of the lifting body 100 , and the lower guide member 21 is recessed at the rear end of the lower receiving member 22 .

[0038] When the bowl and plate set C is flipped down at the lower feeding end of the lifting body 100, the mouth of the bowl and plate set C faces downward, and the rotating wheel C11 is simultaneously supported on the lower receiving member 22 and rolls along the track of the lower receiving member 22. When the bowl and plate set C moves to the lower feeding end of the lifting body 100, the rotating wheel C11 rolls along the track of the lower guide member 21.

[0039] The bowl and plate set C includes a bowl and plate base C1 and a bowl and plate C2 which is detachable from the bowl and plate base C1. The rotating wheel C11 is rotatably arranged on the side of the bowl and plate base C1. When the bowl and plate set C moves to the lower feeding end of the lifting body 100, the bowl and plate base C1 is flipped along the outer guide of the guide wheel 20, and the rotating wheel C11 rolls along the track of the lower guide member 21.

[0040] A chain connecting shaft C3 also extends from the side of the bowl and plate base C1, and is drivingly connected to a driving chain through the chain connecting shaft C3.

[0041] A bowl and plate clamping plate C5, a clamping block C6, a clamping block rotating shaft C7, and a clamping lock release member C8 are provided on the bowl and plate base C1. The bowl and plate clamping plate C5 is fixedly arranged on the bowl and plate base C1, and a clamping interface is formed therebetween. One end of the clamping block C6 is cooperatively connected with the clamping block rotating shaft C7 and is rotatably arranged on the bowl and plate base C1 through the clamping block rotating shaft C7. The bowl and plate C2 is clamped or detached from the clamping interface by the rotation of the clamping block C6. A clamping portion C9 is arranged at the other end of the clamping block C6. The clamping lock release member C8 is rotatably arranged on the bowl and plate base C1 and is locked or separated from the clamping portion C9 when rotating. A rotating acting member C10 is also arranged at the end of the clamping lock release member C8.

[0042] In this embodiment, the axis of rotation of the clamping lock release member C8 is perpendicular to the axis of rotation of the clamping block C6.

[0043] When the bowl and plate C2 needs to be removed, the user can manually or use a tool to act on the rotating acting member C10, so that the clamping lock release member C8 rotates on the bowl and plate base C1 in a direction away from the clamping portion C9. At this time, the clamping lock release member C8 leaves the clamping portion C9, and the clamping block C6 can rotate on the bowl and plate base C1 in a direction away from the bowl and plate C2 through the clamping block rotating shaft C7, and the bowl and plate C2 can be detached from the clamping interface.

[0044] When the bowl and plate C2 needs to be assembled, place the bowl and plate C2 on the clamping interface, and then drive the clamping block C6 to rotate on the bowl and plate base C1 in a direction towards the bowl and plate C2 through the clamping block rotating shaft C7, so that the clamping block C6 positions and clamps the bowl and plate C2 on the clamping interface. Subsequently, manually or use a tool to act on the rotating acting member C10, so that the clamping lock release member C8 rotates on the bowl and plate base C1 in a direction towards the clamping portion C9. At this time, the clamping lock release member C8 is locked on the clamping portion C9, and the assembly of the bowl and plate C2 can be completed.

[0045] The arrangement of the rotating acting member C10 is not only used for manual or tool action, but also can press the clamping block C6 to prevent the rotation and retraction of the clamping block C6, and improve the assembly stability of the bowl and plate C2.

[0046] A lifting guide rail 18 is provided on the lifting body 100. The lifting guide rail 18 is fixedly arranged along the trajectory of the lifting body 100. A lifting runner C4 is rotatably arranged on the bowl and plate base C1. The lifting runner C4 receives and rolls along the trajectory of the lifting guide rail 18.

[0047] The lifting guide rail 18 has an upward supporting flange 23 corresponding to the upward flipping and resetting of the bowl and plate group C. The lifting wheel C4 rolls on the upward supporting flange 23 when the bowl and plate group C moves to the lower feeding end of the lifting body 100, and then receives and rolls along the trajectory of the lifting guide rail 18. Thereby, when the lifting wheel C4 is guided to flip and reset, it can be smoothly received on the lifting guide rail 18 through the guiding effect of the upward supporting flange 23, and then rolls along the trajectory of the lifting guide rail 18. At this time, the bowl and plate group C completes the upward flipping and resetting, and its plate mouth faces upward, so as to further improve the stability of the upward flipping and resetting of the bowl and plate group C.

[0048] A chain guide 15 is provided on the lifting body 100. The chain guide 15 is provided with two sections. The two sections of the chain guide 15 are fixedly arranged at intervals along the trajectory of the lifting body 100. The top discharging end and the bottom feeding end of the lifting body 100 are respectively rotatably provided with a top transmission gear 16 and a bottom transmission gear 24. The top transmission gear 16 is located in front of the two sections of the chain guide 15, and the bottom transmission gear 24 is located behind the two sections of the chain guide 15. The driver 10 is drivingly connected to the top transmission gear 16 or the bottom transmission gear 24, and the driving chain is meshed with the top transmission gear 16 and the bottom transmission gear 24, and is guided to rotate along the trajectory of the two sections of the chain guide 15.

[0049] In this embodiment, the lifting body 100 is Z-shaped as a whole, and its corners are arc-shaped transitions. Support feet of different heights are respectively arranged at the front and rear positions of the lifting body 100. The lifting body 100 is composed of multiple sheet metal parts spliced ​​in a left-right symmetrical manner. Two sections of chain guide rails 15 are respectively arranged on the left and right sheet metal parts. The shape of the chain guide rails 15 is the same as that of the lifting body 100. The bottom edges of the left and right sheet metal parts are respectively provided with lower receiving parts 22 and lower guide parts 21 from bottom to bottom. Rotating wheels C11 are rotatably arranged on the left and right sides of the bowl and plate group C, so that the left and right sides of the bowl and plate group C can stably realize the movement and guide the upward flipping and reset.

[0050] The lifting guide rail 18 is set at one and is located between the left and right symmetrical chain guide rails 15. The shape of the lifting guide rail 18 is the same as that of the chain guide rail 15. The lifting wheel C4 is set at one and rotates at the bottom of the bowl and plate base C1 and is located between the left and right rotating wheels C11.

[0051] A top transmission shaft 17 and a bottom transmission shaft 25 are rotatably arranged on the lifting body 100 , the top transmission gear 16 is cooperatively connected with the top transmission shaft 17 , the guide wheel 20 and the bottom transmission gear 24 are arranged on the same axis, and both are cooperatively connected with the bottom transmission shaft 25 .

[0052] In this embodiment, the top drive gear 16 is fixedly connected to the top drive shaft 17, and the bottom drive gear 25 is rotatably or fixedly connected to the guide wheel 20 and the bottom drive gear 24. Bearing seats are provided on the lifting body 100 corresponding to the top drive shaft 17 and the bottom drive shaft 25 respectively, so that the top drive shaft 17 and the bottom drive shaft 25 can rotate on the lifting body 100 respectively.

[0053] The driver 10 is fixedly arranged at the discharging end of the lifting body 100 and is drivingly connected to the top drive shaft 17.

[0054] When the driver 10 works, it drives the top drive shaft 17 to rotate. When the top drive shaft 17 rotates, it drives the top drive gear 16 to rotate, thereby driving the drive chain to rotate on the two chain guides 15 and driving the guide wheel 20 and the bottom drive gear 24 to rotate simultaneously through the rotation of the drive chain.

[0055] The above is the preferred solution of the present invention, which shows and describes the basic principle, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. An upward-turning guided lifting device, comprising a lifting body (100), a driving chain, and a driver (10), characterized in that: The drive chain rotates along the trajectory of the lifting body (100) and is evenly driven to be connected to a plurality of bowl and plate groups (C); the driver (10) is fixedly arranged on the lifting body (100) and is drivingly connected to the drive chain; a guide wheel (20) and a lower guide member (21) are arranged at the lower feeding end of the lifting body (100); a rotating wheel (C11) is rotatably arranged on the bowl and plate group (C); when the bowl and plate group (C) moves to the lower feeding end of the lifting body (100), it is guided to flip along the outer periphery of the guide wheel (20); the rotating wheel (C11) and the lower guide member (21) are rollingly matched to realize the guided upward flipping and resetting of the bowl and plate group (C).

2. The upward-turning guided lifting device according to claim 1, characterized in that: The guide wheel (20) is rotatably arranged on the lifting body (100), and the lower guide member (21) is arranged in a concave arc, is located below the guide wheel (20), and is fixedly arranged on the lifting body (100).

3. The upward-turning guided lifting device according to claim 2 is characterized in that: The lifting body (100) is provided with a lower receiving member (22), the lower receiving member (22) being fixedly arranged along the track of the lifting body (100), the lower guiding member (21) being located at the rear end of the lower receiving member (22), and after the bowl and plate group (C) is turned down at the lower feeding end of the lifting body (100), the rotating wheel (C11) receives and rolls along the track of the lower receiving member (22), and then rolls along the track of the lower guiding member (21).

4. The upward-turning guided lifting device according to claim 3 is characterized in that: The bowl and plate assembly (C) comprises a bowl and plate base (C1) and bowls and plates (C2) that are detachable from the bowl and plate base (C1); the rotating wheel (C11) is rotatably arranged on the side of the bowl and plate base (C1); when the bowl and plate assembly (C) moves to the lower feeding end of the lifting body (100), the bowl and plate base (C1) is turned over along the outer periphery of the guide wheel (20), and the rotating wheel (C11) rolls along the track of the lower guide member (21).

5. The upward-turning guided lifting device according to claim 4, characterized in that: A chain connecting shaft (C3) is also extended from the side of the bowl and dish base (C1), and is drivingly connected to the driving chain via the chain connecting shaft (C3).

6. The upward-turning guided lifting device according to claim 4, characterized in that: The bowl and dish base (C1) is provided with a bowl and dish clamping plate (C5), a clamping block (C6), a clamping block rotating shaft (C7), and a clamping locking member (C8). The bowl and dish clamping plate (C5) is fixedly arranged on the bowl and dish base (C1), and a clamping interface is formed therebetween. One end of the clamping block (C6) is matched and connected with the clamping block rotating shaft (C7), and is rotatably arranged on the bowl and dish base (C1) through the clamping block rotating shaft (C7). The bowl and dish (C2) is mounted on or detached from the clamping interface through the rotation of the clamping block (C6). The other end of the clamping block (C6) is provided with a clamping portion (C9). The clamping locking member (C8) is rotatably arranged on the bowl and dish base (C1), and is mutually locked or separated with the clamping portion (C9) when rotating. A rotating action member (C10) is also provided at the end of the clamping locking member (C8).

7. The upward-turning guided lifting device according to claim 5, characterized in that: The lifting body (100) is provided with a lifting guide rail (18), the lifting guide rail (18) is fixedly arranged along the track of the lifting body (100), and the bowl and plate base (C1) is rotatably provided with a lifting wheel (C4), the lifting wheel (C4) receives and rolls along the track of the lifting guide rail (18).

8. The upward-turning guided lifting device according to claim 7, characterized in that: The lifting guide rail (18) has an upward-turning support flange (23) corresponding to the upward-turning reset of the bowl and plate group (C); when the bowl and plate group (C) moves to the lower feeding end of the lifting body (100), the lifting wheel (C4) rolls on the upward-turning support flange (23), and then receives and rolls along the track of the lifting guide rail (18).

9. The upward-turning guided lifting device according to claim 1, characterized in that: The lifting body (100) is provided with a chain guide rail (15), and the chain guide rail (15) is provided with two sections. The two sections of the chain guide rail (15) are respectively fixedly arranged at intervals along the trajectory of the lifting body (100). The upper discharge end and the lower feed end of the lifting body (100) are respectively rotatably provided with a top transmission gear (16) and a bottom transmission gear (24). The top transmission gear (16) is located in front of the two sections of the chain guide rail (15), and the bottom transmission gear (24) is located behind the two sections of the chain guide rail (15). The driver (10) is drivingly connected to the top transmission gear (16) or the bottom transmission gear (24). The driving chain is meshed with the top transmission gear (16) and the bottom transmission gear (24) and is guided to rotate along the trajectory of the two sections of the chain guide rail (15).

10. The upward-turning guided lifting device according to claim 9, characterized in that: A top transmission shaft (17) and a bottom transmission shaft (25) are rotatably arranged on the lifting body (100); the top transmission gear (16) is cooperatively connected to the top transmission shaft (17); the guide wheel (20) and the bottom transmission gear (24) are arranged on the same axis, and both are cooperatively connected to the bottom transmission shaft (25); and the driver (10) is fixedly arranged on the discharge end of the lifting body (100) and is drivingly connected to the top transmission shaft (17).

Images