Chain hoist

Abstract

The application discloses a chain lifting machine and particularly relates to the technical field of chain lifting machines, which comprises a lifting mechanism, wherein the lifting mechanism comprises a frame, the back surface of the frame is fixedly connected with a first motor, the output end of the first motor is fixedly connected with a driving shaft, the surface of the driving shaft is fixedly connected with a driving sprocket, the surface of the driving sprocket is engaged with a chain, the top of the inner surface of the chain is engaged with a driven sprocket, and the rear side of the inner surface of the chain is engaged with an adjusting sprocket. The application is provided with an anti-falling mechanism. When the goods placing plate rapidly falls, the speed sensor can detect a signal, at which time the PLC controller controls the servo motor to work, the servo motor drives the rectangular plate to move, the rectangular plate drives the elastic telescopic rod to move, the elastic telescopic rod drives the adjusting plate to move, the adjusting plate drives the bolt to move, the bolt is conveniently inserted into the limiting groove, and thus the anti-falling effect can be achieved.

Description

Technical Field

[0001] This invention relates to the field of chain elevator technology, and more specifically, to a chain elevator. Background Technology

[0002] Hoisting machines are large mechanical devices that transport goods by changing potential energy, such as mine hoists and dam hoists. In a broader sense, elevators, overhead cranes, winches, trolleys, cranes, gate hoists, etc. can all be called hoists. Hoisting machines generally refer to large mechanical devices with high power and strong lifting capacity. They complete the transportation process by driving flexible steel wire ropes and the transported goods up and down through power machinery. Steel wire ropes are an indispensable and important part of lifting machinery. The main types include phosphated coated steel wire ropes, galvanized steel wire ropes, stainless steel wire ropes, bright steel wire ropes, etc.

[0003] According to patent document CN216335006U, a chain elevator is disclosed, including a base and several material racks, as well as baffles symmetrically fixed on the sides of the base. A stainless steel frame is fixedly connected to the top of the baffles, and a middle baffle is fixedly connected between the two stainless steel racks. The chain elevator also includes a conveying mechanism mounted on the stainless steel racks for rotary cyclic conveying of the material racks. The conveying mechanism includes chain guides fixed to the inner sides of the two stainless steel racks. The chain guides are U-shaped with non-connected corners. A conveying chain, which is rectangular in shape, is slidably connected inside the chain guides. The conveying chain is equipped with a drive assembly. This chain elevator design enables stable bottom-to-top material transport while ensuring the horizontality of the material transport during the conveying stage, preventing tilting and material drop. Material unloading is also convenient, saving unloading time, and has practical value in the field of material transport equipment.

[0004] Currently, traditional chain elevators are prone to chain loosening after prolonged use. Due to the lack of tension adjustment, the chain easily separates from the sprocket. Furthermore, there is no warning when the chain needs to be replaced, which can lead to chain breakage and cause the storage plate to fall. In addition, there is no limit function during the fall of the storage plate, and goods are prone to falling, which can easily cause danger and fail to meet the usage requirements. Summary of the Invention

[0005] To overcome the aforementioned deficiencies of the prior art, the present invention provides a chain elevator. The technical problem to be solved by the present invention is that in the current traditional chain elevator, the chain is prone to loosening after long-term operation during daily use. Due to the lack of tension adjustment function, the chain is prone to separating from the sprocket. Moreover, there is no warning when the chain needs to be replaced, which makes the chain prone to breakage. This causes the shelf to fall, and there is no limiting function during the shelf's fall, making it easy for goods to fall and causing danger. Therefore, the present invention fails to meet the usage requirements.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a chain lifting machine, comprising a lifting mechanism, the lifting mechanism comprising a frame, a first motor fixedly connected to the back of the frame, a drive shaft fixedly connected to the output end of the first motor, a drive sprocket fixedly connected to the surface of the drive shaft, a chain meshing with the surface of the drive sprocket, a driven sprocket meshing with the top of the inner surface of the chain, and an adjusting sprocket meshing with the rear side of the inner surface of the chain;

[0007] A tension adjustment mechanism is provided on one side of the frame. The tension adjustment mechanism includes a housing. A second motor is fixedly connected to the bottom of the housing. A crankshaft is fixedly connected to the output end of the second motor. A connecting rod is movably connected to the surface of the crankshaft. A first pressure sensor is fixedly connected to one side of the connecting rod. An adjusting rod is fixedly connected to one side of the first pressure sensor. A connecting frame is fixedly connected to one side of the adjusting rod. A bracket is fixedly connected to one side of the connecting frame. A connecting shaft is movably connected to one side of the bracket. The surface of the connecting shaft is movably connected to an adjusting sprocket. A fixing plate is fixedly connected to one side of the housing. A second pressure sensor is fixedly connected to one side of the fixing plate.

[0008] As a further embodiment of the present invention: a fall protection mechanism is provided on one side of the chain, the fall protection mechanism includes a shelf, one side of the shelf is fixedly connected to the chain, a box is fixedly connected to the bottom of the shelf, a servo motor is fixedly connected to the left side of the inner cavity of the box, a lead screw is fixedly connected to the output end of the servo motor, a rectangular plate is threaded onto the surface of the lead screw, an elastic telescopic rod is fixedly connected to one side of the rectangular plate, an adjusting plate is fixedly connected to one side of the elastic telescopic rod, a pin is fixedly connected to one side of the adjusting plate, a vertical plate is fixedly connected to the bottom of the inner cavity of the frame, a limit groove is formed on one side of the vertical plate, and a speed sensor is fixedly connected to the left side of the inner cavity of the box.

[0009] As a further embodiment of the present invention: a limiting mechanism is provided on one side of the housing, the limiting mechanism including a drive motor, one side of the drive motor being fixedly connected to the housing, a drive gear being fixedly connected to the output end of the drive motor, a driven gear meshing on one side of the drive gear, a connecting gear meshing on one side of the driven gear, a take-up roller being fixedly connected to the inner cavity of the connecting gear, a fabric belt being fixedly connected to the surface of the take-up roller, and a pressure plate being fixedly connected to one side of the fabric belt.

[0010] As a further aspect of the present invention: a movable shaft is fixedly connected to the inner cavity of the driven sprocket, and the front and back sides of the movable shaft are movably connected to the frame through a first bearing.

[0011] As a further aspect of the present invention: a sliding sleeve is fixedly connected to the top of the connecting rod, and a sliding rod is slidably connected to the inner cavity of the sliding sleeve, with both sides of the sliding rod fixedly connected to the housing.

[0012] As a further aspect of the present invention: a fixing seat is fixedly connected to one side of the housing, and one side of the fixing seat is fixedly connected to the frame.

[0013] As a further aspect of the present invention: a power distribution cabinet is fixedly connected to the front of the frame, a storage battery is fixedly connected to the bottom of the inner cavity of the power distribution cabinet, and a PLC controller is fixedly connected to the rear side of the inner cavity of the power distribution cabinet.

[0014] As a further embodiment of the present invention: a crossbar is slidably connected to the inner cavity of the rectangular plate, and one side of the crossbar is fixedly connected to the box body. Slide grooves are provided at the right ends of the front and rear sides of the inner cavity of the frame, and a slider is slidably connected to the inner cavity of the slide groove, and one side of the slider is fixedly connected to the shelf.

[0015] As a further aspect of the present invention: the inner cavity of the driven gear is fixedly connected to a limiting shaft, and one side of the limiting shaft is movably connected to the housing via a second bearing.

[0016] As a further embodiment of the present invention: each of the four corners of the bottom of the shelf is fixedly connected with an elastic telescopic column, and the top of the elastic telescopic column is fixedly connected to the pressure plate.

[0017] The beneficial effects of this invention are as follows:

[0018] 1. The present invention provides a lifting mechanism, which controls a first motor via a PLC controller. The first motor drives a drive shaft to rotate, which in turn drives a drive sprocket to rotate, which in turn drives a chain to rotate, thereby facilitating lifting operations.

[0019] 2. This invention, by setting a tension adjustment mechanism, uses a PLC controller to adjust the chain tension. When the first pressure sensor detects that the pressure value is lower than the set value, the PLC controller controls the second motor to operate. The second motor drives the crankshaft to rotate, which in turn drives the connecting rod to move. The connecting rod then drives the first pressure sensor to move, which in turn drives the adjusting rod to move. The adjusting rod then drives the connecting frame to move, which in turn drives the bracket to move. The bracket then drives the connecting shaft to move, which in turn drives the adjusting sprocket. When the bracket contacts the second pressure sensor, the second pressure sensor detects a signal indicating that the chain has been adjusted to its maximum value and needs to be replaced. At this point, the PLC controller will control the first motor to stop operating.

[0020] 3. By setting up an anti-fall mechanism, the speed sensor will detect a signal when the shelf falls rapidly. At this time, the PLC controller will control the servo motor to work. The servo motor drives the rectangular plate to move, the rectangular plate drives the elastic telescopic rod to move, the elastic telescopic rod drives the adjusting plate to move, and the adjusting plate drives the pin to move, so that the pin can be inserted into the limit slot, thereby achieving the effect of preventing falls.

[0021] 4. This invention uses a limiting mechanism to place the material on top of the shelf. Then, the drive motor is started, which drives the drive gear to rotate. The drive gear drives the driven gear to rotate, which drives the connecting gear to rotate. The connecting gear drives the take-up roller to rotate. The take-up roller takes up the fabric belt, and the fabric belt moves the pressure plate to limit the material, preventing it from falling and ensuring safety when lifting the material. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention from a first-view perspective.

[0023] Figure 2 This is a three-dimensional structural diagram of the present invention from a second perspective.

[0024] Figure 3 This is a three-dimensional structural diagram of the present invention from a third-view perspective.

[0025] Figure 4 This is a cross-sectional view of the power distribution cabinet of the present invention;

[0026] Figure 5 This is a partial three-dimensional structural diagram of the fall protection mechanism of the present invention;

[0027] Figure 6 This is a schematic cross-sectional view of the box structure of the present invention;

[0028] Figure 7 This is a partial three-dimensional structural diagram of the tension adjustment mechanism of the present invention.

[0029] In the diagram: 1. Lifting mechanism; 101. Frame; 102. First motor; 103. Drive shaft; 104. Drive sprocket; 105. Chain; 106. Driven sprocket; 107. Movable shaft; 108. Adjusting sprocket; 2. Tension adjustment mechanism; 201. Housing; 202. Second motor; 203. Crankshaft; 204. Connecting rod; 205. First pressure sensor; 206. Adjusting rod; 207. Connecting frame; 208. Bracket; 209. Connecting shaft; 210. Fixing plate; 211. Second pressure sensor; 212. Sliding sleeve; 213. Sliding... 3. Anti-fall mechanism; 301. Shelf; 302. Box; 303. Servo motor; 304. Lead screw; 305. Rectangular plate; 306. Elastic telescopic rod; 307. Adjusting plate; 308. Pin; 309. Vertical plate; 310. Limiting groove; 311. Speed ​​sensor; 4. Limiting mechanism; 401. Drive motor; 402. Drive gear; 403. Driven gear; 404. Connecting gear; 405. Take-up roller; 406. Fabric belt; 407. Pressure plate; 408. Elastic telescopic column; 5. Power distribution cabinet; 6. Battery; 7. PLC controller. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7As shown, the present invention provides a chain lifting machine, including a lifting mechanism 1. The lifting mechanism 1 includes a frame 101, a first motor 102 fixedly connected to the back of the frame 101, a drive shaft 103 fixedly connected to the output end of the first motor 102, a drive sprocket 104 fixedly connected to the surface of the drive shaft 103, a chain 105 meshing with the surface of the drive sprocket 104, a driven sprocket 106 meshing with the top of the inner surface of the chain 105, and an adjusting sprocket 108 meshing with the rear side of the inner surface of the chain 105. By setting up the lifting mechanism 1, the first motor 102 is controlled by a PLC controller 7, and the first motor 102 drives the drive shaft 103 to rotate. The drive sprocket 104 rotates, which in turn drives the chain 105 to rotate, facilitating lifting operations. A movable shaft 107 is fixedly connected to the inner cavity of the driven sprocket 106. The front and back of the movable shaft 107 are movably connected to the frame 101 via first bearings. The first bearings and the movable shaft 107 stabilize the operation of the driven sprocket 106 and limit its movement. A power distribution cabinet 5 is fixedly connected to the front of the frame 101. A battery 6 is fixedly connected to the bottom of the inner cavity of the power distribution cabinet 5, and a PLC controller 7 is fixedly connected to the rear side of the inner cavity of the power distribution cabinet 5. The battery 6 facilitates power supply to the equipment, thus aiding in lifting operations.

[0032] like Figure 1 , Figure 2 , Figure 3 and Figure 7As shown, a tension adjustment mechanism 2 is provided on one side of the frame 101. The tension adjustment mechanism 2 includes a housing 201. A second motor 202 is fixedly connected to the bottom of the housing 201. A crankshaft 203 is fixedly connected to the output end of the second motor 202. A connecting rod 204 is movably connected to the surface of the crankshaft 203. A first pressure sensor 205 is fixedly connected to one side of the connecting rod 204. An adjusting rod 206 is fixedly connected to one side of the first pressure sensor 205. A connecting frame 207 is fixedly connected to one side of the adjusting rod 206. A bracket 2 is fixedly connected to one side of the connecting frame 207. 08. A connecting shaft 209 is movably connected to one side of the bracket 208. The surface of the connecting shaft 209 is movably connected to the adjusting sprocket 108. A fixing plate 210 is fixedly connected to one side of the housing 201. A second pressure sensor 211 is fixedly connected to one side of the fixing plate 210. By setting the tension adjustment mechanism 2, the PLC controller 7 controls the second motor 202 to work after the first pressure sensor 205 detects that the pressure value is lower than the set value. The second motor 202 drives the crankshaft 203 to rotate, and the crankshaft 203 drives the connecting rod 2. 04. The connecting rod 204 moves the first pressure sensor 205, which in turn moves the adjusting rod 206. The adjusting rod 206 moves the connecting frame 207, which in turn moves the bracket 208. The bracket 208 moves the connecting shaft 209, which in turn moves the adjusting sprocket 108. This allows adjustment of the chain tension 105. When the bracket 208 contacts the second pressure sensor 211, the second pressure sensor 211 detects a signal, indicating that the chain 105 has been adjusted to its maximum value and needs to be replaced. The PLC controller 7 will control the first motor 102 to stop working; the top of the connecting rod 204 is fixedly connected to the sliding sleeve 212, and the inner cavity of the sliding sleeve 212 is slidably connected to the sliding rod 213. Both sides of the sliding rod 213 are fixedly connected to the housing 201. By setting the sliding rod 213 and the sliding sleeve 212, the operation of the connecting rod 204 is stabilized and the connecting rod 204 is balanced and supported; a fixed seat is fixedly connected to one side of the housing 201, and one side of the fixed seat is fixedly connected to the frame 101. By setting the fixed seat, the operation of the housing 201 is stabilized and the housing 201 is limited.

[0033] like Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6As shown, a fall protection mechanism 3 is provided on one side of the chain 105. The fall protection mechanism 3 includes a shelf 301, one side of which is fixedly connected to the chain 105. A housing 302 is fixedly connected to the bottom of the shelf 301. A servo motor 303 is fixedly connected to the left side of the inner cavity of the housing 302. A lead screw 304 is fixedly connected to the output end of the servo motor 303. A rectangular plate 305 is threaded onto the surface of the lead screw 304. An elastic telescopic rod 306 is fixedly connected to one side of the rectangular plate 305. An adjusting plate 307 is fixedly connected to one side of the elastic telescopic rod 306. A pin 308 is fixedly connected to one side of the adjusting plate 307. A vertical plate 309 is fixedly connected to the bottom of the inner cavity of the frame 101. A limit groove 310 is provided on one side of the vertical plate 309. A speed sensor 311 is fixedly connected to the left side of the inner cavity of the housing 302. By setting up the fall protection mechanism 3... When the shelf 301 falls rapidly, the speed sensor 311 detects a signal. At this time, the PLC controller 7 controls the servo motor 303 to work. The servo motor 303 drives the rectangular plate 305 to move, the rectangular plate 305 drives the elastic telescopic rod 306 to move, the elastic telescopic rod 306 drives the adjusting plate 307 to move, and the adjusting plate 307 drives the pin 308 to move, so that the pin 308 can be inserted into the limiting groove 310, thereby achieving the effect of preventing falling. The inner cavity of the rectangular plate 305 is slidably connected with a crossbar, and one side of the crossbar is fixedly connected to the box 302. The front and rear right ends of the inner cavity of the frame 101 are provided with sliding grooves, and the inner cavity of the sliding grooves is slidably connected with sliders, and one side of the sliders is fixedly connected to the shelf 301. By setting the sliding grooves and sliders, the operation of the shelf 301 is stabilized, and the shaking of the shelf 301 during movement is prevented.

[0034] like Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6As shown, a limiting mechanism 4 is provided on one side of the housing 302. The limiting mechanism 4 includes a drive motor 401, one side of which is fixedly connected to the housing 302. A drive gear 402 is fixedly connected to the output end of the drive motor 401. A driven gear 403 meshes with one side of the drive gear 402. A connecting gear 404 meshes with one side of the driven gear 403. A take-up roller 405 is fixedly connected to the inner cavity of the connecting gear 404. A fabric belt 406 is fixedly connected to the surface of the take-up roller 405. A pressure plate 407 is fixedly connected to one side of the fabric belt 406. By setting the limiting mechanism 4, the material is placed on the top of the shelf 301. Then, the drive motor 401 is started, and the drive motor 401 drives the drive gear 402 to rotate. The drive gear 402 drives the driven gear 403 to rotate. Gear 403 drives connecting gear 404 to rotate, connecting gear 404 drives take-up roller 405 to rotate, take-up roller 405 winds up fabric belt 406, fabric belt 406 drives pressure plate 407 to move, limiting the material and preventing it from falling, thus ensuring safety when lifting the material; the inner cavity of driven gear 403 is fixedly connected to a limiting shaft, and one side of the limiting shaft is movably connected to housing 302 through a second bearing. By setting the limiting shaft and the second bearing, the operation of driven gear 403 is stabilized and the driven gear 403 is limited; elastic telescopic columns 408 are fixedly connected to the four corners of the bottom of the shelf 301, and the top of the elastic telescopic columns 408 is fixedly connected to pressure plate 407. By setting the elastic telescopic columns 408, the operation of pressure plate 407 is stabilized and the pressure plate 407 can move upward on its own.

[0035] The working principle of this invention is as follows: by setting up a lifting mechanism 1, the first motor 102 is controlled by the PLC controller 7, the first motor 102 drives the drive shaft 103 to rotate, the drive shaft 103 drives the drive sprocket 104 to rotate, and the drive sprocket 104 drives the chain 105 to rotate, thereby facilitating the lifting operation.

[0036] By setting the tension adjustment mechanism 2, and using the pressure value of the PLC controller 7, when the first pressure sensor 205 detects that the pressure value is lower than the set value, the PLC controller 7 will control the second motor 202 to work. The second motor 202 drives the crankshaft 203 to rotate, the crankshaft 203 drives the connecting rod 204 to move, the connecting rod 204 drives the first pressure sensor 205 to move, the first pressure sensor 205 drives the adjusting rod 206 to move, the adjusting rod 206 drives the connecting frame 207 to move, the connecting frame 207 drives the bracket 208 to move, the bracket 208 drives the connecting shaft 209 to move, and the connecting shaft 209 drives the adjusting sprocket 108 to move, thereby adjusting the tension of the chain 105. When the bracket 208 contacts the second pressure sensor 211, the second pressure sensor 211 will detect a signal, indicating that the chain 105 has been adjusted to the maximum value and needs to be replaced. At this time, the PLC controller 7 will control the first motor 102 to stop working.

[0037] By setting the anti-fall mechanism 3, when the shelf 301 falls rapidly, the speed sensor 311 will detect the signal. At this time, the PLC controller 7 will control the servo motor 303 to work. The servo motor 303 drives the rectangular plate 305 to move. The rectangular plate 305 drives the elastic telescopic rod 306 to move. The elastic telescopic rod 306 drives the adjusting plate 307 to move. The adjusting plate 307 drives the pin 308 to move, so that the pin 308 can be inserted into the limit groove 310, thereby achieving the effect of preventing falls.

[0038] By setting the limiting mechanism 4, the material is placed on the top of the placement plate 301. Then, the drive motor 401 is started. The drive motor 401 drives the drive gear 402 to rotate. The drive gear 402 drives the driven gear 403 to rotate. The driven gear 403 drives the connecting gear 404 to rotate. The connecting gear 404 drives the take-up roller 405 to rotate. The take-up roller 405 takes up the fabric belt 406. The fabric belt 406 drives the pressure plate 407 to move, limiting the material and preventing it from falling, thus ensuring safety when lifting the material.

[0039] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0040] Secondly: The accompanying drawings of the embodiments disclosed in this invention only involve the structures involved in the embodiments disclosed in this invention. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this invention can be combined with each other.

[0041] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A chain hoist, comprising a hoisting mechanism (1), characterized in that: The lifting mechanism (1) includes a frame (101), a first motor (102) is fixedly connected to the back of the frame (101), a drive shaft (103) is fixedly connected to the output end of the first motor (102), a drive sprocket (104) is fixedly connected to the surface of the drive shaft (103), a chain (105) is engaged on the surface of the drive sprocket (104), a driven sprocket (106) is engaged on the top of the inner surface of the chain (105), and an adjusting sprocket (108) is engaged on the rear side of the inner surface of the chain (105). A tension adjustment mechanism (2) is provided on one side of the frame (101). The tension adjustment mechanism (2) includes a housing (201). A second motor (202) is fixedly connected to the bottom of the housing (201). A crankshaft (203) is fixedly connected to the output end of the second motor (202). A connecting rod (204) is movably connected to the surface of the crankshaft (203). A first pressure sensor (205) is fixedly connected to one side of the connecting rod (204). One side of the first pressure sensor (205) is... An adjusting rod (206) is fixedly connected to one side of the adjusting rod (206), a connecting frame (207) is fixedly connected to one side of the connecting frame (207), a bracket (208) is fixedly connected to one side of the connecting frame (207), a connecting shaft (209) is movably connected to one side of the bracket (208), and the surface of the connecting shaft (209) is movably connected to the adjusting sprocket (108). A fixing plate (210) is fixedly connected to one side of the housing (201), and a second pressure sensor (211) is fixedly connected to one side of the fixing plate (210). A fall protection mechanism (3) is provided on one side of the chain (105). The fall protection mechanism (3) includes a shelf (301). One side of the shelf (301) is fixedly connected to the chain (105). A box (302) is fixedly connected to the bottom of the shelf (301). A servo motor (303) is fixedly connected to the left side of the inner cavity of the box (302). A lead screw (304) is fixedly connected to the output end of the servo motor (303). A rectangular thread is threaded onto the surface of the lead screw (304). A rectangular plate (305) is fixedly connected to one side of an elastic telescopic rod (306), an adjusting plate (307) is fixedly connected to one side of the elastic telescopic rod (306), a pin (308) is fixedly connected to one side of the adjusting plate (307), a vertical plate (309) is fixedly connected to the bottom of the inner cavity of the frame (101), a limit groove (310) is opened on one side of the vertical plate (309), and a speed sensor (311) is fixedly connected to the left side of the inner cavity of the box (302). A limiting mechanism (4) is provided on one side of the housing (302). The limiting mechanism (4) includes a drive motor (401). One side of the drive motor (401) is fixedly connected to the housing (302). A drive gear (402) is fixedly connected to the output end of the drive motor (401). A driven gear (403) meshes with one side of the drive gear (402). A connecting gear (404) meshes with one side of the driven gear (403). A take-up roller (405) is fixedly connected to the inner cavity of the connecting gear (404). A cloth belt (406) is fixedly connected to the surface of the take-up roller (405). A pressure plate (407) is fixedly connected to one side of the cloth belt (406).

2. The chain hoist according to claim 1, characterized in that: The inner cavity of the driven sprocket (106) is fixedly connected to a movable shaft (107), and the front and back sides of the movable shaft (107) are movably connected to the frame (101) through a first bearing.

3. A chain elevator according to claim 1, characterized in that: The top of the connecting rod (204) is fixedly connected to a sliding sleeve (212), and the inner cavity of the sliding sleeve (212) is slidably connected to a sliding rod (213). Both sides of the sliding rod (213) are fixedly connected to the housing (201).

4. A chain elevator according to claim 1, characterized in that: A fixing seat is fixedly connected to one side of the housing (201), and one side of the fixing seat is fixedly connected to the frame (101).

5. A chain hoist according to claim 1, characterized in that: A power distribution cabinet (5) is fixedly connected to the front of the frame (101), a storage battery (6) is fixedly connected to the bottom of the inner cavity of the power distribution cabinet (5), and a PLC controller (7) is fixedly connected to the rear side of the inner cavity of the power distribution cabinet (5).

6. A chain elevator according to claim 1, characterized in that: The inner cavity of the rectangular plate (305) is slidably connected to a crossbar, and one side of the crossbar is fixedly connected to the box (302). The right end of the front and rear sides of the inner cavity of the frame (101) is provided with a sliding groove, and the inner cavity of the sliding groove is slidably connected to a slider, and one side of the slider is fixedly connected to the shelf (301).

7. A chain elevator according to claim 1, characterized in that: The inner cavity of the driven gear (403) is fixedly connected to a limiting shaft, and one side of the limiting shaft is movably connected to the housing (302) through a second bearing.

8. A chain hoist according to claim 1, characterized in that: The four corners of the bottom of the shelf (301) are fixedly connected with elastic telescopic columns (408), and the top of the elastic telescopic columns (408) is fixedly connected to the pressure plate (407).

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