Lifting appliance

Abstract

The utility model relates to a lifting appliance which comprises a lifting frame and a support frame which are fixedly connected with each other, the lower portion of the supporting frame is connected with a connecting beam. The lower part of the connecting beam is connected with supporting legs; the supporting legs are connected with hooks; the supporting frame comprises a cross beam and a connecting beam. A motor and a transmission device are fixedly arranged on the upper portion of the supporting frame. The lower part of the connecting beam is transversely connected with a connecting beam; the lower part of each connecting beam is connected with a plurality of supporting legs; a clamp is hinged to the lower part of each supporting leg; a connecting frame is fixed to the upper portion of each supporting leg, and a hook is connected to each connecting frame. According to the utility model, the clamp structure is additionally arranged on the basis of the original lifting appliance. The motor drives the transmission device to enable the clamps to move to adjust the distance between the clamps according to the width of plates to load and unload plate stacks, and the problem that time and labor are wasted during manual lifting and unloading is solved. Two modes of the clamp and the hook are used, so that the utilization rate of the lifting appliance is increased.

Description

Technical Field

[0001] This utility model relates to the field of hoisting technology, and in particular to a hoisting lifting device. Background Technology

[0002] In precision sawing, stacks of unprocessed planks need to be transported to the processing area. Due to the large size and weight of these stacks, overhead cranes are typically used for transport. Traditional cranes use a combination of hooks and wire ropes. The upper part of the wire rope is attached to the hook, and the lower part is manually secured to the stack. The crane then moves the crane to transport the planks. However, because the stacks are large and heavy, and there are many planks, they are prone to falling off, posing safety hazards and property damage. Furthermore, using hooks for lifting requires manual loading and unloading, which is time-consuming and labor-intensive. Existing cranes only utilize hooks, resulting in low utilization rates. Summary of the Invention

[0003] This invention addresses the problems of existing lifting devices that can only use hooks to lift heavy stacks of boards, which are prone to falling off when there are many boards; the need for manual loading and unloading of boards when using hooks, which is time-consuming and labor-intensive; and the inability of lifting devices to clamp boards securely using only hooks. The invention provides a lifting device with clamps, capable of supporting heavy stacks of boards and preventing the wire rope from slipping and causing safety hazards during lifting. The device uses a motor-driven transmission device to adjust the spacing of the connecting beams, automatically loading and unloading stacks of boards, reducing the time and labor required for manual unloading. Furthermore, the device can be used in both hook and clamp modes, improving its utilization rate.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A lifting device includes a lifting frame and a support frame, wherein the lifting frame is fixedly connected to the support frame; two parallel connecting beams are connected to the lower part of the support frame; hooks are connected to the lower part of the connecting beams; the support frame includes two crossbeams and two connecting beams, wherein the crossbeams and connecting beams are arranged in a "well" shape;

[0006] A motor and a transmission device are fixedly mounted on the support frame, and the motor is connected to the transmission device.

[0007] Two connecting beams are laterally connected at the lower part of the two connecting beams. Each connecting beam is fixed with a bracket. The bracket passes through the connecting beam and is connected to the transmission device. The transmission device causes the bracket to drive the connecting beam to move left and right. Each connecting beam is connected to multiple legs at the lower part. The multiple legs are evenly fixed to the bottom of the connecting beam. Each leg is equipped with a clamp at the lower part.

[0008] Each of the outriggers has a connecting frame fixed to its upper outer side, and each connecting frame has a hook attached to it.

[0009] Further, the transmission device comprises a transmission shaft, a connecting shaft, a bevel gear set and a gear rack set; the transmission shaft is horizontally arranged on the upper part of the support frame, and the transmission shaft is in chain transmission with the motor;

[0010] The connecting shaft is vertically arranged on the connecting beam, the bevel gear set is arranged on the upper part of the connecting beam, and the transmission shaft transmits power to the connecting shaft through the bevel gear set; the gear rack set is arranged inside the connecting beam, and the connecting shaft drives the support to move through the gear rack set.

[0011] Further, the bevel gear set comprises two meshing bevel gears, one bevel gear is fixed to one end of the transmission shaft, and the other bevel gear is fixed to the upper part of the connecting shaft.

[0012] Further, the gear rack set comprises a driving wheel and two racks, the driving wheel is fixed on the connecting shaft, and the two racks are arranged on the two sides of the inside of the connecting beam respectively, the two racks are in meshing with the driving wheel; the two racks are connected with the supports adjacent to the ends of the racks respectively.

[0013] Further, pulleys are arranged between the inner side wall of the connecting beam and the supporting leg and between the inner side wall of the connecting beam and the rack; the pulley between the inner side wall of the connecting beam and the supporting leg is connected with the supporting leg to assist the movement of the supporting leg; a plurality of pulleys are arranged between the inner side wall of the connecting beam and the rack, and the plurality of pulleys are arranged along the length direction of the rack; the plurality of pulleys are connected with the rack to assist the movement of the rack.

[0014] Further, the clamp is of "L" shape structure, the bottom of the clamp is of inverted trapezoidal structure, and the inclined edge of the bottom of the clamp does not contact the lower layer of the board when the clamp passes through the board, so as to prevent the clamp from scratching the lower layer of the board during the passing process; the cross section of the supporting leg is of U shape structure, the clamp is located in the supporting leg and the upper part of the clamp is hinged with the supporting leg; a square groove is formed on the surface of the supporting leg opposite to the clamp, the distance between the hinge point of the clamp and the supporting leg and the top of the square groove is greater than the height of the clamp, so as to facilitate the storage of the clamp after being turned upward; the contact surface between the inner wall of the supporting leg and the outer wall of the clamp is in interference fit, and a protective cover is arranged on each supporting leg.

[0015] Further, the contact surface of the clamp in contact with the board is fixed with a rubber pad, so as to prevent the clamp from being pressed and bruised due to excessive clamping force when clamping the board.

[0016] Further, a photoelectric limit switch is fixed on the clamp, the transmission device and the photoelectric limit switch are used in cooperation through the motor, the movement of the clamp is adjusted according to the width of the board to adjust the distance between the clamps, and the problem of time-consuming and laborious of manual crane unloading is reduced.

[0017] Further, the end of the connecting beam is connected with a baffle, so as to prevent the flying chips in the machining process of the lathe from entering the inside of the connecting beam, affect the normal operation of the transmission device, and cause the service life of the transmission device to be shortened.

[0018] Further, the lifting frame is provided with an anti-unhooking shaft, which prevents the crane hook from unhooking during the lifting of the lifting device, thereby causing property loss.

[0019] Through the above technical scheme, the utility model has the beneficial effects that:

[0020] The utility model discloses a clamp structure is added on the basis of the original lifting device, and the clamp structure can clamp the plate stack, prevents the safety hidden danger caused by the plate stack unhooking during lifting, and the motor drives the transmission device and the photoelectric positioner to cooperate with each other, so that the clamp moves according to the plate width to adjust the clamp spacing to load and unload the plate stack, and the problem of time and effort is reduced when the person unloads the lifting device.

[0021] The utility model discloses a clamp bottom is inverted trapezoidal structure, can when the clamp passes through between the plate, and the clamp bottom bevel does not contact the lower layer plate of plate stack, prevents the clamp from scratching the lower layer plate during passing through the plate. ACCURATE DRAWINGS

[0022] Figure 1 It is a structure schematic view of the utility model discloses a kind of lifting device.

[0023] Figure 2 It is the schematic diagram of the change of lifting device adjustment spacing before and after when the utility model discloses a kind of lifting device uses state.

[0024] Figure 3 It is a kind of lifting device of the utility model Figure 1 Partial enlarged schematic view.

[0025] Figure 4 It is a kind of lifting device of the utility model Figure 2 Partial enlarged schematic view.

[0026] Figure 5 It is the schematic diagram of the end structure of the utility model discloses a kind of lifting device connection beam.

[0027] The attached diagram is labeled as follows: 1. Lifting frame, 2. Anti-detachment hook shaft, 3. Crossbeam, 4. Connecting beam, 5. Bracket, 6. Connecting beam, 7. Outrigger, 8. Protective cover, 9. Clamp, 10. Hook, 11. Connecting frame, 12. Photoelectric limiter, 13. Transmission box, 14. Motor, 15. Transmission shaft, 16. Bevel gear set, 17. Connecting shaft, 18. Drive wheel, 19. Rack, 20. Baffle, 21. Hook shaft, 22. Pulley, 23. Limit sensor, 24. Rotary positioning device. Detailed Implementation

[0028] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings:

[0029] like Figures 1-5 As shown, a lifting device includes a lifting frame 1, on which an anti-detachment shaft 2 is fixed. The distance between the anti-detachment shaft 2 and the hook shaft 21 of the lifting device is less than the maximum internal gap of the lifting hook and greater than the maximum diameter of the lifting hook. This prevents the crane hook from detaching during the lifting operation of the lifting device, thus preventing property damage.

[0030] A support frame is fixedly connected to the bottom of the hoisting frame 1. The support frame includes two crossbeams 3 and two connecting beams 4. In this embodiment, both crossbeams 3 and two connecting beams 4 are hollow structures, which facilitates the installation of a transmission device inside the support frame. The two crossbeams 3 and two connecting beams 4 are arranged in a "well" shape to improve the stability of the support frame.

[0031] A motor 14 is mounted on the top of the crossbeam 3, and the motor 14 is connected to the transmission device.

[0032] The transmission device comprises a transmission shaft 15, a connecting shaft 17 and a gear and rack set; the transmission shaft 15 is arranged between the upper portions of the two connecting beams 4, and the transmission shaft 15 is arranged in the same direction as the cross beam 3; the transmission shaft 15 is chain-transmitted with the motor 14; the transmission shaft 15 is provided with a bevel gear set 16 at each end; each connecting beam 4 is longitudinally provided with a connecting shaft 17, one end of the connecting shaft 17 is arranged at the top of the connecting beam 4, and the other end is arranged in the connecting beam 4 in a suspended manner through the connecting beam 4. In the embodiment, the bevel gear set 16 comprises two meshing bevel gears, and the two bevel gears are arranged on the transmission shaft 15 and the connecting shaft 17, respectively; in the embodiment, the upper portions of the two connecting beams 4 are fixedly provided with a transmission box 13 which is in communication with the inside of the connecting beam 4, and the bevel gear sets 16 at the two ends of the transmission shaft 15 are arranged in the transmission box 13, so that the sealing property of the transmission device is improved, and the service life of the transmission device is prolonged. The gear and rack set comprises two sets, and each connecting beam 4 is provided with one set of gear and rack set inside; each set of gear and rack set comprises a driving wheel 18, two racks 19 and a plurality of pulleys 22; the driving wheel 18 is fixedly arranged at the middle portion of the suspended end of the connecting shaft 17, and the two racks 19 are arranged on the two sides of the connecting beam 4, respectively; the two racks 19 are in meshing connection with the driving wheel 18. A plurality of pulleys 22 are arranged between each rack 19 and the inner side wall of the connecting beam 4 along the length direction of the rack 19, and the plurality of pulleys 22 are connected with the rack 19; in the embodiment, the pulley 22 comprises three pulleys which are arranged at the two ends of the rack 19 and the middle portion of the rack 19, respectively. When the driving wheel 18 drives the two racks 19 to move to the two ends, respectively, the pulleys 22 assist the racks 19 to move.

[0033] In order to prevent the moving distance of the rack 19 from being out of the stroke range, a limiting sensor 23 is fixedly arranged at the end portion of the connecting beam 4, and the limiting sensor 23 is in contact with the rack 19 when the rack 19 moves to the end portion of the connecting beam 4. The commonly used limiting sensor 23 on the market is suitable for the utility model. In order to prevent the rack 19 from moving leftward and rightward during the movement, a rotary positioning device 24 is further arranged at the two end portions of the connecting beam 4, and the rotary positioning device 24 comprises a shaft and two rotary wheels; the shaft is fixedly arranged at the two end portions of the connecting beam 4 in a longitudinal manner, and the two rotary wheels are arranged at the two ends of the shaft.

[0034] The lower portions of the two connecting beams 4 are transversely connected with two connecting beams 6, and the two connecting beams 4 and the two connecting beams 6 are arranged in a "well" shape. Two brackets 5 are fixedly arranged at the upper portions of each connecting beam 6, and a sliding groove is formed at the bottom of each connecting beam 4 on both sides; the two brackets 5 of each connecting beam 6 are fixedly connected with the racks 19 on the same side of the gear and rack set in the two connecting beams 4, respectively. A pulley 22 is arranged between the bracket 5 and the inner side wall of the connecting beam 4, and the pulley 22 is connected with the bracket 5 to assist the bracket 5 to move.

[0035] A plurality of legs 7 are connected to the lower part of each connecting beam 6; in this embodiment, there are four legs 7, which are evenly arranged at the bottom of the connecting beam 6; a connecting frame 11 is fixed at the top end of each leg 7, and a hook 10 is arranged on each connecting frame 11; in this embodiment, the hook 10 is a safety hook with spring compression to prevent the hoisting wire rope from falling off the hook and causing an accident.

[0036] A clamp 9 is hingedly connected to the bottom of each leg 7; the clamp 9 has an “L” shape, and the clamps 9 on the two connecting beams 6 are arranged oppositely; the cross section of the leg 7 is in a U shape, the clamp 9 is located inside the leg 7, and the upper part of the clamp 9 is pin-connected to the leg 7; a square groove is formed on the opposite surface of the leg 7 and the clamp 9, and the distance between the hinge point of the clamp 9 and the top of the square groove is greater than the height of the clamp 9, so as to facilitate the storage of the clamp 9 after being turned upward; the contact surface between the inner wall of the leg 7 and the outer wall of the clamp 9 is in interference fit, so as to prevent the clamp 9 from scratching the material when the hook 10 is used.

[0037] The bottom of the clamp 9 is in an inverted right-angled trapezoidal structure, and the hypotenuse of the right-angled trapezoidal structure at the bottom of the clamp 9 can prevent the bottom edge from contacting the lower plate when the clamp 9 contacts the plate stack, so as to prevent the lower plate from being scratched.

[0038] A rubber pad is fixed to the part of the lower part of the clamp 9 that contacts the plate, so as to prevent the clamp 9 from being squeezed and pressed when clamping the plate.

[0039] A protective cover 8 is hingedly connected to the upper part of each leg 7; the protective cover 8 is connected to the leg 7 through a pin, so as to prevent the rope from hooking the clamp 9 when the hook 10 is used, thereby affecting the use effect.

[0040] An optical limit switch 12 is arranged on each clamp 9; in this embodiment, the optical limit switch 12 is a commonly used optical limit switch on the market, and when the two sides of the lifting appliance are close to the plate stack with a distance of 50 mm, the optical limit switch 12 acts after the motor 14 stops and brakes.

[0041] A baffle 20 is arranged at the two ends of each connecting beam 4, so as to prevent the flying chips in the machining process of the lathe from entering the inside of the connecting beam 4, thereby affecting the normal operation of the transmission device and shortening the service life of the transmission device.

[0042] When the lifting hanger is used, the lifting hanger is lifted by the travelling crane and moved to the top of the plate pile; the motor 14 on the support frame drives the transmission shaft 15 to rotate through the chain transmission, the transmission shaft 15 drives the bevel gear set 16 and the connecting shaft 17 at both ends to rotate, the connecting shaft 17 drives the driving wheel 18 to rotate, the driving wheel 18 meshes with the rack 19 to move the rack 19, the rack 19 drives the support frame 5 and the connecting beam 6 fixed thereto to move, and the spacing of the two connecting beams 6 is adjusted according to the width of the plate; when the clamps 9 on both sides of the lifting hanger approach the plate pile by 50 mm, the photoelectric limit switch 12 acts, the motor 14 stops and brakes, the travelling crane drives the lifting hanger to move downward to make the clamps 9 approach the side of the plate pile, the motor 14 is started, the motor 14 drives the clamps 9 on the connecting beam 6 to move and insert into the bottom of the plate pile through the transmission device, when the clamps 9 clamp the plate pile, the travelling crane drives the lifting hanger to move, the clamps 9 are pin-connected with the supporting leg 7, the number of the clamps 9 can be adjusted according to the use condition, and the unused clamps 9 can be rotated into the square groove on the supporting leg 7 to prevent the unused clamps 9 from affecting the use effect.

[0043] When the hook 10 needs to be used, all the clamps 9 are rotated into the square groove on the supporting leg 7, and the hook 10 can be used.

[0044] The above-described embodiments are only preferred embodiments of the present application, and do not limit the implementation range of the present application, so that equivalent changes or modifications made according to the structure, features and principles described in the patent range of the present application should be included in the patent range of the present application.

Claims

1. A lifting sling, comprising a lifting frame (1) and a support frame, the lifting frame (1) being fixedly connected with the support frame; two parallel connecting beams (6) are connected at the lower part of the support frame; a hook (10) is connected at the lower part of the connecting beam (6); characterized in that, The support frame includes two crossbeams (3) and two connecting beams (4), the crossbeams (3) and the connecting beams (4) are arranged in a "well" shape; A motor (14) and a transmission device are fixedly mounted on the support frame, and the motor (14) is connected to the transmission device; Two connecting beams (4) are laterally connected at the bottom of two connecting beams (6). Each connecting beam (6) is fixed with a bracket (5). The bracket (5) passes through the connecting beam (4) and is connected to the transmission device. The transmission device causes the bracket (5) to drive the connecting beam (6) to move left and right. Each of the connecting beams (6) is connected to a plurality of legs (7) at the bottom, and the plurality of legs (7) are evenly fixed to the bottom of the connecting beams (6); each leg (7) is provided with a clamp (9) at the bottom; each leg (7) is fixed with a connecting frame (11) on the upper outer side, and each connecting frame (11) is connected with a hook (10).

2. A lifting spreader according to claim 1, characterised in that The transmission device includes a transmission shaft (15), a connecting shaft (17), a bevel gear set (16), and a gear and rack set; the transmission shaft (15) is horizontally arranged on the upper part of the support frame, and the transmission shaft (15) is chain-driven with the motor (14); the connecting shaft (17) is vertically arranged on the connecting beam (4), the bevel gear set (16) is arranged on the upper part of the connecting beam (4), and the transmission shaft (15) transmits power to the connecting shaft (17) through the bevel gear set (16); the gear and rack set is arranged inside the connecting beam (4), and the connecting shaft (17) drives the bracket (5) to move through the gear and rack set.

3. A lifting spreader according to claim 2, characterised in that The bevel gear set (16) includes two meshing bevel gears, one bevel gear fixed to one end of the drive shaft (15) and the other bevel gear fixed to the upper part of the connecting shaft (17).

4. A lifting spreader according to claim 2, characterised in that The gear and rack assembly includes a drive wheel (18) and two racks (19). The drive wheel (18) is fixed on the connecting shaft (17). The two racks (19) are respectively located on both sides inside the connecting beam (4). Both racks (19) mesh with the drive wheel (18). The two racks (19) are respectively connected to the brackets (5) adjacent to the ends of the racks.

5. A lifting spreader according to claim 4, characterised in that Pulleys (22) are provided between the inner wall of the connecting beam (4) and the support (5), and between the connecting beam (4) and the rack (19); the pulleys (22) between the inner wall of the connecting beam (4) and the support (5) are connected to the support (5) to assist the support (5) in moving left and right; multiple pulleys (22) are provided between the inner wall of the connecting beam (4) and the rack (19), and the multiple pulleys (22) are spaced apart along the length of the rack (19); the multiple pulleys (22) are all connected to the rack (19) to assist the rack (19) in moving.

6. A lifting spreader according to claim 1, characterised in that The clamp (9) is in "L" shape structure, the bottom of the clamp is inverted trapezoidal structure; the cross section of the supporting leg (7) is U-shaped structure, the clamp (9) is located in the supporting leg (7) and the upper part thereof is hinged with the supporting leg (7); the opposite surface of the supporting leg (7) and the clamp (9) is provided with a square slot, the distance between the hinge point of the clamp (9) and the supporting leg (7) and the top of the square slot is greater than the height of the clamp (9), which is convenient for storing the clamp (9) after being turned upward; the contact surface of the inner wall of the supporting leg (7) and the outer wall of the clamp (9) is in interference fit, and each supporting leg (7) is provided with a protective cover (8).

7. The lifting spreader according to claim 1, characterized in that The contact surface of the clamp (9) in contact with the plate is fixed with a rubber pad.

8. The lifting spreader according to claim 1, characterized in that The clamp (9) is fixed with a photoelectric limit switch (12).

9. The lifting spreader according to claim 1, characterized in that The end of the connecting beam (4) is connected with a baffle (20).

10. The lifting spreader according to claim 1, characterized in that The hoisting frame (1) is provided with an anti-unhooking shaft (2).

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