An efficient transfer mechanism

Abstract

The lifting platform is lowered to a height at which a material trolley can enter, and the material trolley is directly driven onto the support plate, and the support plate is pushed up to a height at which the lifting device is convenient for lifting materials through the starting member. During the rising process of the support plate, the mounting frame on the support plate is driven up, and the roller moves on the limit plate while the mounting frame rises, until it falls out of the limit plate. After the roller falls out of the limit plate, under the action of the elastic member, the connecting member pushes the locking member to move outward, so that the locking member extends outward and is inserted into the material trolley, thereby limiting the forward and backward movement of the material trolley, so that the material trolley can be accurately locked on the support plate, thereby avoiding the movement of the material trolley, which leads to the problem that materials cannot be lifted.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical transmission, and in particular to a high-efficiency transfer mechanism. Background Art

[0002] In industrial production operations, conveying equipment plays a vital role. Whether in the processing process or in product inspection operations, conveying equipment can greatly improve production efficiency and save a lot of manpower and material resources. For example, lifting and transferring machines play an important role in large-scale assembly line production.

[0003] The efficient transfer mechanism in the prior art can only transfer the parts on the material vehicle to the lifting platform manually or by other manipulators, thereby increasing the extra workload, reducing the work efficiency, and increasing the work cost. Summary of the invention

[0004] In order to solve the above problems, the purpose of the present invention is to provide an efficient transfer mechanism, which is used to solve the technical problem that the efficient transfer mechanism in the prior art can only transfer parts from the material cart to the lifting platform by hand or other robots, thereby increasing extra workload, reducing work efficiency and increasing work costs.

[0005] To solve the above technical problems, the embodiments of the present invention adopt the following technical solutions:

[0006] An embodiment of the present invention provides an efficient transfer mechanism, which includes a frame, a lifting platform, a lifting device and a translation device, wherein the translation device is installed on the frame, the lifting device is connected to the translation device, and the lifting platform is placed under the frame;

[0007] The lifting platform comprises a base, a starting member and a support plate, wherein the support plate is connected to the base through the starting member;

[0008] The support plate is provided with a locking device, and the locking device includes a locking member, a limiting plate, a roller, an elastic member, a mounting frame and a connecting member. The mounting frame is installed on the lifting platform, and the locking member is movably arranged on the mounting frame. The first end of the locking member passes through the mounting frame and is connected to the connecting member, the roller is connected to the connecting member, one end of the elastic member is connected to the mounting frame, and the other end of the elastic member is connected to the connecting member;

[0009] The limiting plate is mounted on the base, and the outer periphery of the roller is in contact with the side surface of the limiting plate which is away from the mounting frame.

[0010] Furthermore, the transfer mechanism also includes a transport device for transporting materials, and the transport device includes a transport bin and wheels, the wheels are mounted on the transport bin, and the transport bin is provided with a locking portion that is compatible with the locking member.

[0011] Furthermore, the locking device further comprises an elastic member, a detection switch and a driver, and the transfer mechanism further comprises a controller;

[0012] The controller is electrically connected to the detection switch, the lifting platform, the lifting device and the translation device. The detection switch and the driver are installed on the mounting frame to detect whether the material is in place. The driver is connected to the connecting piece to drive the connecting piece to move forward and backward.

[0013] Furthermore, the locking device further comprises an elastic member, a detection switch and a driver, and the transfer mechanism further comprises a controller;

[0014] The controller is electrically connected to the detection switch, the lifting platform, the lifting device and the translation device. The detection switch and the driver are installed on the mounting frame to detect whether the material is in place. The driver is connected to the connecting piece to drive the connecting piece to move forward and backward.

[0015] Furthermore, the locking device also includes a limiting member, a first groove is provided on the mounting frame, one end of the limiting member is connected to the locking member, and the other end of the limiting member is installed in the first groove.

[0016] Furthermore, the mounting frame is provided with a first hole and a second hole, the locking member is inserted into the first hole and the second hole, and the connection between the limiting member and the locking member is located between the first hole and the second hole.

[0017] Furthermore, linear bearings are disposed on the first hole and the second hole, and the locking member is disposed on the first hole and the second hole respectively through the corresponding linear bearings.

[0018] Furthermore, the transfer mechanism also includes a transmission device, which is arranged below the transfer mechanism. The transmission device includes a motor, a base frame, a rotating wheel and a transmission belt. The motor is installed on the base frame, and several rotating wheels are in contact with the inner side surface of the transmission belt. All the rotating wheels are rotatably arranged on the base frame, and adjacent rotating wheels transmit to each other. The main shaft of the motor is connected to one of the rotating wheels.

[0019] Furthermore, the lifting platform includes a support plate, a starting member and a base, one end of the starting member is installed on the base, the support plate is installed on the starting member, and the mounting frame is installed on the support plate.

[0020] Furthermore, a vertical surface and an inclined surface are provided on the side surface of the limiting plate in contact with the roller, and the inclined surface is provided at a position away from one end of the base.

[0021] Furthermore, the translation device includes a drag chain, a motor, a gear and a drag chain frame, the drag chain frame is movably mounted on the frame, the drag chain is connected to the drag chain frame, the motor is mounted on the frame, the gear is mounted on the main shaft of the motor, and the gear and the drag chain are meshed with each other.

[0022] Furthermore, the lifting device includes a pneumatic hoist, a lifting frame and a sling, the pneumatic hoist is installed on the lifting frame, the pneumatic hoist is connected to the sling, the lifting frame is movably installed on the frame, and the lifting frame is connected to the drag chain.

[0023] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0024] The lifting mechanism comprises a lifting device, a lifting device and a lifting device, wherein the lifting mechanism is lifted and the lifting device is lifted up, and the lifting device is used to lift the lifting device and the lifting device is used to lift the lifting device. Then the lifting device is lowered into the material trolley, the material in the material trolley is lifted, the lifted material is translated to the target position by the translation device, and the material is put down by the lifting device. By arranging the lifting device and the translation device on the mobile rack, the purpose of conveying the static to the moving line body can be achieved, which is efficient and convenient. This effectively solves the technical problem that the efficient transfer mechanism in the prior art can only transfer the parts on the material trolley to the lifting platform by hand or other manipulators, thereby increasing the extra workload, reducing the work efficiency, and increasing the work cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0026] Figure 1 It is a structural schematic diagram of a high-efficiency transfer mechanism provided by an embodiment of the present invention;

[0027] Figure 2 It is a structural schematic diagram of a locking device of a high-efficiency transfer mechanism provided by an embodiment of the present invention;

[0028] Figure 3 It is a structural schematic diagram of a reset state of a locking device of a high-efficiency transfer mechanism provided by an embodiment of the present invention;

[0029] Figure 4 It is a structural schematic diagram of a limit plate of a locking device of a high-efficiency transfer mechanism provided by an embodiment of the present invention;

[0030] Figure 5 It is a structural schematic diagram of a lifting platform in a lifting state of a high-efficiency transfer mechanism provided by an embodiment of the present invention;

[0031] in:

[0032] 100, frame; 200, lifting platform; 201, support plate; 202, starting member; 203, base; 204, limit plate; 205, inclined plane; 206, vertical plane; 300, transportation device; 301, transportation bin; 302, wheel; 303, locking part; 401, locking member; 402, mounting frame; 403, elastic member; 404, roller; 405, connecting member; 406, limit member; 407, first slot; 500, translation device; 501, drag chain frame; 502, drag chain; 503, motor; 600, lifting device; 601, sling; 602, pneumatic hoist; 603, lifting frame; 700, transmission device; 701, motor; 702, rotating wheel; 703, transmission belt; 704, base frame. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0034] In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0035] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a replaceable connection, or an integral connection, it can be a mechanical connection, it can be an electrical connection, it can be a direct connection, it can be indirectly connected through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0036] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0037] like Figure 1 As shown, Figure 1 A schematic structural diagram of an efficient transfer mechanism provided by an embodiment of the present invention;

[0038] like Figure 1-5 As shown, the transfer mechanism includes a frame 100, a lifting platform 200, a lifting device 600 and a translation device 500, wherein the translation device 500 is installed on the frame 100, the lifting device 600 is connected to the translation device 500, and the lifting platform 200 is placed under the frame 100;

[0039] The lifting platform 200 includes a base 203, a starting member 202 and a support plate 201, wherein the support plate 201 is connected to the base 203 via the starting member 202; one end of the starting member 202 is mounted on the base 203, and the support plate 201 is mounted on the starting member 202. The starting member 202 may be a device such as a hydraulic cylinder or a pneumatic cylinder that can push the support plate 201 up and down.

[0040] The support plate 201 is provided with a locking device, and the locking device includes a locking member 401, a limit plate 204, a roller 404, an elastic member 403, a mounting frame 402 and a connecting member 405. The mounting frame 402 is installed on the lifting platform 200, and the locking member 401 is movably arranged on the mounting frame 402. The first end of the locking member 401 passes through the mounting frame 402 and is connected to the connecting member 405. The roller 404 is connected to the connecting member 405. One end of the elastic member 403 is connected to the mounting frame 402, and the other end of the elastic member 403 is connected to the connecting member 405. The elastic member 403 is preferably a spring.

[0041] The limiting plate 204 is mounted on the base 203 , and the outer periphery of the roller 404 is in contact with the side of the limiting plate 204 away from the mounting frame 402 .

[0042] The lifting platform 200 is lowered to a height at which the material trolley can enter, and the material trolley is directly driven onto the support plate 201. The support plate 201 is pushed up to a height at which the lifting device 600 is convenient for lifting materials through the starting member 202. During the rising process of the support plate 201, the mounting frame 402 on the support plate 201 is driven to rise. As the mounting frame 402 rises, the roller 404 moves on the limit plate 204 until it is out of the limit plate 20 4. After the roller 404 escapes from the limit plate 204, under the action of the elastic member 403, the connecting member 405 pushes the locking member to move outward, so that the locking member extends outward and is inserted into the material trolley, limiting the forward and backward movement of the material trolley, so that the material trolley can be accurately locked on the support plate 201, avoiding the movement of the material trolley, resulting in the problem of being unable to lift the material, and at the same time, avoiding the material trolley shaking during the lifting process, resulting in the danger of the material trolley falling from the lifting platform 200. Then, the lifting device 600 is lowered into the material trolley, the material in the material trolley is lifted, and the lifted material is translated to the target position by the translation device 500, and the material is put down by the lifting device 600. By arranging the lifting device 600 and the translation device 500 on the moving frame 100, the purpose of conveying the static to the moving line body can be achieved, which is efficient and convenient.

[0043] Among them, Figure 4As shown, the side of the limit plate 204 in contact with the roller 404 is provided with a vertical surface 206 and an inclined surface 205, and the inclined surface 205 is provided at a position away from one end of the base 203. Under the action of the elastic member 403, the locking member can have a tendency to extend, and the limit member 406 plays a limiting role in this tendency. The vertical surface 206 of the limit member 406 limits the roller 404. When the locking member 401 needs to be locked, when the support plate 201 rises, the roller 404 also rises, and the roller 404 will roll to the inclined surface 205 until it is out of the side of the limit plate 204. Under the action of the spring, the connecting member 405 drives the locking member 401 to extend to lock the material trolley. When the support plate 201 descends, when the roller 404 descends to the inclined surface 205, it can directly pass through the inclined surface 205 to enter the side of the limiting plate 204 that plays a limiting role, that is, the vertical surface 206 can limit the roller 404 to prevent the roller 404 from rolling under the action of the elastic member 403, causing the locking member 401 to extend. However, when the roller 404 moves to the inclined surface 205, under the action of the elastic member 403, the roller 404 can roll out on the inclined surface 205, drive the locking member 401 to move, and insert it to the locked position.

[0044] As the support plate 201 moves downward and the roller 404 moves on the inclined surface 205 to the vertical surface 206, the spring is stretched so that the spring has the power to extend the locking member 401 next time, thereby resetting the locking member 401. The limit plate 204 can be used to automatically lock the material trolley and automatically reset it so that it can be used again next time. The structure is simple and does not require other driving elements to operate, which reduces the cost of the transfer mechanism, improves the working efficiency of the transfer mechanism, simplifies the control process of the transfer mechanism, and can effectively and quickly realize the locking function through a simple mechanical structure design.

[0045] In order to prevent the material trolley from moving on the support platform, the limit plate 204 can be made shorter, and the height can be selected to be 10cm-30cm.

[0046] The frame 100 is a gantry frame, which is composed of two support columns vertically locked on the ground and a crossbeam connected to the two support columns. The translation device 500 and the lifting device 600 are both installed on the crossbeam.

[0047] Thus, the material vehicle placed on the lifting platform 200 is locked simply and quickly. By means of the elastic member 403 and the limiting member 406, the structure is simple and the efficiency is high.

[0048] The transfer mechanism further includes a transport device 300 for transporting materials, which is a material trolley. The transport device 300 includes a transport bin 301 and wheels 302. The wheels 302 are mounted on the transport bin 301. The transport bin 301 is provided with a locking portion 303 adapted to the locking member 401. The transport device 300 moves onto the support plate 201, and the mounting frame 402 is locked onto the support plate 201 by bolts. Both the transport device 300 and the mounting frame 402 move up and down under the action of the starting member 202. Materials are placed in the transport bin 301, and the materials are transported by pushing or by driving the motor 701. The locking portion 303 may be a slot or a hole, and the locking member 401 may be a pin, which is inserted into the slot or the hole to prevent the transport device 300 from moving.

[0049] The translation device 500 includes a drag chain 502, a motor 503, a gear and a drag chain 502 frame 501. The drag chain 502 frame 501 is movably installed on the frame 100. The drag chain 502 is connected to the drag chain 502 frame 501. The motor 503 is installed on the frame 100. The gear is installed on the main shaft of the motor 503. The gear and the drag chain 502 are meshed with each other.

[0050] The motor 503 drives the gear to rotate, and the gear drives the drag chain 502 to move. Under the action of the drag chain 502 frame 501, the drag chain 502 moves horizontally to push the lifting device 600.

[0051] The lifting device 600 includes a pneumatic hoist 602, a lifting frame and a sling 601. The pneumatic hoist 602 is installed on the lifting frame 603. The pneumatic hoist 602 is connected to the sling 601. The lifting frame is movably installed on the frame 100, and the lifting frame is connected to the drag chain 502. The pneumatic hoist 602 provided in this embodiment includes two, which are symmetrically installed on the lifting frame 603. The hooks of the two pneumatic hoists 602 respectively hook the sling 601 to drive the sling 601 to move up and down. When the sling 601 is driven to move downward, it can grab or release materials. When the sling 601 is driven to rise, it can move through the sling chain. Driven by the motor 503, the drag chain 502 drives the lifting frame 603, the sling 601 and the materials on the sling 601 to move horizontally on the frame 100.

[0052] The transfer mechanism also includes a transmission device 700, which is arranged below the transfer mechanism. The transmission device 700 includes a motor 701, a base frame 704, a rotating wheel 702 and a transmission belt 703. The motor 701 is installed on the base frame 704. Several rotating wheels 702 are in contact with the inner side of the transmission belt 703. All the rotating wheels 702 are rotatably arranged on the base frame 704. Adjacent rotating wheels 702 are mutually transmitted. The main shaft of the motor 701 is connected to one of the rotating wheels 702. The motor 701 drives the rotating wheel 702 connected thereto to rotate, and the rotating wheel 702 drives the rotating wheels 702 around it to rotate, thereby driving the transmission belt 703 to move. The transmission device 700 can also be set to any form of a conveyor belt driven by the motor 503, as long as it can realize a conveyor belt.

[0053] The lifting frame, the sling 601 and the materials on the sling 601 are moved to the top of the conveyor belt 703 by the drag chain 502 of the translation device 500, and the sling 601 and the materials on the sling 601 are moved to the conveyor belt 703 by the pneumatic hoist 602, the clamping of the sling 601 is released, the materials are placed on the conveyor belt 703, and transported to another workstation by the conveyor belt 703.

[0054] In order to realize the automation of the above device, the transfer mechanism further includes a controller, and the locking device further includes a detection switch.

[0055] The controller is electrically connected to the detection switch, the lifting platform 200, the lifting device 600 and the translation device 500. The detection switch and the driver are installed on the mounting frame 402 to detect whether the material is in place.

[0056] When the transport device 300 enters the support plate 201 of the lifting platform 200, the detection device detects and determines whether the material is in place to avoid the problem that the transport device 300 is not in place and cannot be locked. The detection device can be a distance sensor or a trigger switch, which can directly measure the position of the transport device 300 to determine whether the material is in place. When the detection device detects that the material on the transport device 300 is in place, it sends a signal to the controller. The controller is electrically connected to the starting member 202 for driving the starting member 202. The controller controls the support plate 201 to rise to a preset position. During the rising process of the support plate 201, the roller 404 moves on the side of the limit plate 204. When the roller 404 moves to the inclined surface 205 of the limit plate 204 or escapes from the limit plate 204, the locking member is inserted into the locking part to lock the transport device 300, the controller is connected to the motor 503, the motor 503 is controlled to drive the drag chain 502 to drive the sling 601 to the top of the material, the controller is electrically connected to the pneumatic hoist 602, the controller drives the pneumatic hoist 602 to descend to the position where the sling 601 can hook or clamp the material, the sling 601 clamps or hooks the material, the controller drives the pneumatic hoist 602 to rise to the preset position, the controller controls the motor 503 to drive the drag chain 502 to move the sling 601 and the material on the sling 601 to the top of the conveyor belt 703, and the pneumatic hoist 602 is driven by the controller, and the material on the sling 601 is moved down and placed on the conveyor belt 703. The controller is connected to the motor 701, and the transmission device 700 is started by the controller to transmit the material to the next station. The controller controls the pneumatic hoist 602 to reset, controls the motor 503 to reset the drag chain 502, and resets the lifting platform 200. During the resetting process of the lifting platform 200, the locking member is reset under the action of the inclined surface 205 of the limit plate 204. The efficient transfer mechanism provided in this embodiment automatically detects and automatically lifts and lowers the trolley after entering the lifting platform 200, and automatically locks, thereby realizing an automated process that takes both efficiency and safety into consideration.

[0057] In order to further limit the position of the locking member 401, the locking device also includes a limiting member 406, a first groove 407 is provided on the mounting frame 402, one end of the limiting member 406 is connected to the locking member 401, and the other end of the limiting member 406 is installed in the first groove 407.

[0058] In order to facilitate the installation of the locking member 401 on the mounting frame 402, the mounting frame 402 is provided with a first hole and a second hole, the locking member 401 is inserted into the first hole and the second hole, and the connection between the limiting member 406 and the locking member 401 is located between the first hole and the second hole.

[0059] In order to facilitate the locking member 401 to move freely forward and backward on the mounting frame 402, linear bearings are provided on the first hole and the second hole, and the locking member 401 is respectively provided on the first hole and the second hole through the corresponding linear bearings.

[0060] The locking member 401 is inserted into the material trolley to limit the forward and backward movement of the transport device 300, so that the transport device 300 can be accurately locked on the lifting platform 200, avoiding the movement of the transport device 300, resulting in the inability to lift the material, and at the same time, avoiding the transport device 300 from shaking during the lifting process, resulting in the danger of the transport device 300 falling from the lifting platform 200. Then, the lifting device 600 is lowered into the transport device 300, the material in the transport device 300 is lifted, and the lifted material is translated to the target position by the translation device 500, and the material is put down by the lifting device 600. By arranging the lifting device 600 and the translation device 500 on the moving frame 100, the purpose of conveying the static to the moving line body can be achieved, which is efficient and convenient.

[0061] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An efficient transfer mechanism, characterized in that: The transfer mechanism comprises a frame, a lifting platform, a lifting device and a translation device, wherein the translation device is installed on the frame, the lifting device is connected to the translation device, and the lifting platform is placed under the frame; The lifting platform comprises a base, a starting member and a support plate, wherein the support plate is connected to the base through the starting member; The support plate is provided with a locking device, and the locking device includes a locking member, a limiting plate, a roller, an elastic member, a mounting frame and a connecting member. The mounting frame is installed on the lifting platform, and the locking member is movably arranged on the mounting frame. The first end of the locking member passes through the mounting frame and is connected to the connecting member, the roller is connected to the connecting member, one end of the elastic member is connected to the mounting frame, and the other end of the elastic member is connected to the connecting member; The limiting plate is mounted on the base, and the outer periphery of the roller is in contact with the side of the limiting plate away from the mounting frame; The locking device further comprises a limiting member, the mounting frame is provided with a first slot, one end of the limiting member is connected to the locking member, and the other end of the limiting member is mounted in the first slot; The mounting frame is provided with a first hole and a second hole, the locking member is inserted into the first hole and the second hole, and the connection between the limiting member and the locking member is located between the first hole and the second hole; A vertical surface and an inclined surface are arranged on the side surface of the limiting plate in contact with the roller, and the inclined surface is arranged at a position away from one end of the base.

2. The efficient transfer mechanism according to claim 1, characterized in that: The transfer mechanism also includes a transport device for transporting materials, and the transport device includes a transport bin and wheels. The wheels are mounted on the transport bin, and a locking portion adapted to the locking member is provided on the transport bin.

3. The efficient transfer mechanism according to claim 1, characterized in that: The locking device further includes a detection switch, and the transfer mechanism further includes a controller; The controller is electrically connected to the detection switch, the lifting platform, the lifting device and the translation device. The detection switch is installed on the mounting frame and is used to detect whether the material is in place.

4. The high-efficiency transfer mechanism according to claim 1, characterized in that: The first hole and the second hole are both provided with linear bearings, and the locking member is respectively provided on the first hole and the second hole through the corresponding linear bearings.

5. The efficient transfer mechanism according to claim 1, characterized in that: The transfer mechanism also includes a transmission device, which is arranged below the transfer mechanism. The transmission device includes a motor, a base frame, a rotating wheel and a transmission belt. The motor is installed on the base frame. Several rotating wheels are in contact with the inner side surface of the transmission belt. All the rotating wheels are rotatably arranged on the base frame. Adjacent rotating wheels transmit to each other. The main shaft of the motor is connected to one of the rotating wheels.

6. The high-efficiency transfer mechanism according to claim 1, characterized in that: The translation device includes a tow chain, a motor, a gear and a tow chain frame, the tow chain frame is movably mounted on the frame, the tow chain is connected to the tow chain frame, the motor is mounted on the frame, the gear is mounted on the main shaft of the motor, and the gear and the tow chain are meshed with each other.

7. The high-efficiency transfer mechanism according to claim 6, characterized in that: The lifting device comprises a pneumatic hoist, a lifting frame and a sling, the pneumatic hoist is installed on the lifting frame, the pneumatic hoist is connected to the sling, the lifting frame is movably installed on the frame, and the lifting frame is connected to the drag chain.

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