CN111453643A

CN111453643A - Lifting machine

Info

Publication number: CN111453643A
Application number: CN201911044462.2A
Authority: CN
Inventors: 董强; 毛肖啸; 武辉伟; 方元; 金海航
Original assignee: Hangzhou Dc Energy Equipment Co ltd
Current assignee: Hangzhou Dc Energy Equipment Co ltd
Priority date: 2019-10-30
Filing date: 2019-10-30
Publication date: 2020-07-28
Anticipated expiration: 2039-10-30
Also published as: CN111453643B

Abstract

The invention discloses a lifting machine, which comprises an upright post, a lifting platform and a winch, wherein a sling is wound on the winch, a connector is arranged on the lifting platform, one end, far away from the winch, of the sling is connected with the connector, the connector comprises an outer barrel and an inner barrel, the sling extends into the inner barrel, a chute is arranged on the inner wall of the outer barrel, a convex shaft is arranged on the outer side of the inner barrel, and the convex shaft is connected in the chute in a sliding manner; the inner cylinder is provided with a plurality of guide grooves in the circumferential direction, clamping blocks capable of moving along the radial direction of the inner cylinder are arranged in the guide grooves, and anti-skidding grooves are formed in one sides, close to the slings, of the clamping blocks; and a clamping mechanism is arranged between the clamping block and the outer cylinder, and the clamping block moves towards the center of the inner cylinder under the action of the clamping mechanism when the inner cylinder and the outer cylinder rotate relatively. The lifting platform can firmly fix the sling on the lifting platform through the connector, so that the sling is effectively prevented from being separated from the lifting platform, the lifting platform is prevented from falling, and the use safety of the lifter is improved.

Description

Lifting machine

Technical Field

The invention relates to the technical field of lifting devices, in particular to a lifting machine.

Background

A hoist is a mechanical device for vertically transporting objects. The hoister generally comprises a stand column, a lifting platform and a winch, wherein a sling is wound on the winch, one end of the sling is fixedly connected with the lifting platform, and the lifting platform is driven by the winch to move up and down, so that objects are conveyed to a high place from a low place. In the existing elevator, a steel cable fixing buckle is usually arranged on an elevator platform, and the end part of a sling is fixed on the steel cable fixing buckle, so that the connection between the sling and the elevator platform is realized. For example, the invention discloses a steel cable fixing buckle, which comprises two clamping plates and a bolt, wherein the two clamping plates are provided with strip-shaped grooves for accommodating the steel cable on opposite side surfaces, the two clamping plates are provided with screw holes with corresponding positions, and the bolt penetrates through the corresponding screw holes to enable the two clamping plates to clamp the steel cable. The steel cable fixing buckle is characterized in that a sling is clamped between two clamping plates, the two clamping plates are connected through a bolt, and the sling is clamped between the two clamping plates through the pressing force of the bolt. The disadvantages of this clamping method are: the lifting machine is at long-time use in-process, and the screw is not hard up easily, leads to the hoist cable to break away from the cable wire is fixed to be buckled easily, leads to cable wire and elevating platform disconnection, makes the elevating platform fall, causes great potential safety hazard.

Disclosure of Invention

The invention aims to solve the problems that in the existing elevator, a sling is connected with a lifting platform through a steel cable fixing buckle, and is easy to separate from the steel cable fixing buckle in the use process, so that the sling is easy to disconnect from the lifting platform, the lifting platform falls and larger potential safety hazards are caused.

The purpose of the invention is realized by the following technical scheme: a lifting machine comprises a stand column, a lifting platform and a winding machine, wherein a sling is wound on the winding machine, a connector is arranged on the lifting platform, one end, away from the winding machine, of the sling is connected with the connector, the connector comprises an outer barrel and an inner barrel, the sling extends into the inner barrel, a chute is arranged on the inner wall of the outer barrel, a convex shaft is arranged on the outer side of the inner barrel, and the convex shaft is connected in the chute in a sliding mode; the inner cylinder is provided with a plurality of guide grooves in the circumferential direction, clamping blocks capable of moving along the radial direction of the inner cylinder are arranged in the guide grooves, and anti-skidding grooves are formed in one sides, close to the slings, of the clamping blocks; and a clamping mechanism is arranged between the clamping block and the outer cylinder, and the clamping block moves towards the center of the inner cylinder under the action of the clamping mechanism when the inner cylinder and the outer cylinder rotate relatively.

In the invention, the lifting platform moves up and down along the upright post under the traction of the winch. The outer cylinder is fixedly arranged on the lifting platform. The end part of the sling extends into the inner cylinder. The clamping block is clamped on the side surface of the sling. When the clamping block is under the axial tension of the sling, the convex shaft arranged on the outer side of the inner cylinder can slide along the chute, so that the inner cylinder and the outer cylinder can rotate relatively, the clamping block moves towards the center of the inner cylinder under the action of the clamping mechanism when the inner cylinder and the outer cylinder rotate relatively, so that the clamping block can clamp the sling more tightly, the axial tension of the sling is larger, the clamping force of the clamping block to the sling is larger, the sling is effectively prevented from being separated from the lifting platform, the falling of the lifting platform is avoided, and the use safety of the lifter is improved. The anti-skidding grooves arranged on the clamping blocks can increase the friction force between the clamping blocks and the sling, and the sling is prevented from slipping from the clamping blocks.

Preferably, the clamping mechanism comprises a convex block arranged on the clamping block, the convex block is arranged on one side, close to the inner wall of the outer cylinder, of the clamping block, a guide inclined plane corresponding to the convex block is arranged on the inner wall of the outer cylinder, and the convex block is abutted to the guide inclined plane. When the inner cylinder and the outer cylinder rotate relatively, the convex blocks arranged on the clamping blocks can move along the guide inclined planes, and in the process, the clamping blocks can move towards the center of the inner cylinder under the action of the guide inclined planes, so that the clamping blocks can clamp the sling more firmly.

Preferably, the protruding shaft comprises a central shaft integrally formed with the inner barrel, a rolling outer ring is sleeved on the central shaft, and a ball is arranged between the rolling outer ring and the central shaft. The rolling outer ring is in rolling contact with the groove wall of the chute, so that the friction between the convex shaft and the chute is reduced.

Preferably, the hoist includes a motor and a drum connected to an output shaft of the motor, and the hoist cable is wound around the drum. The winding drum rotates under the driving of the motor, the winding and unwinding of the sling are controlled, and then the lifting of the lifting platform is controlled.

Preferably, a ladder stand is arranged on the outer side of the upright post. The ladder stand can be convenient for the operation personnel to maintain the lifting machine.

Preferably, the upper end of the upright post is provided with a cross beam, the cross beam is rotatably connected with a pulley, and one end of a sling passes through the pulley and is connected with the connector.

Preferably, the upright post is provided with a guide plate, the guide plate is arranged along the axial direction of the upright post, one side of the lifting platform, which is close to the upright post, is provided with a guide support, the guide support is provided with two guide wheels, and the guide wheels are tightly pressed on two sides of the guide plate. The guide support moves along the axial direction of the guide plate, so that the lifting platform is guided, the lifting platform can move along the axial direction of the upright column, and the moving direction of the lifting platform is prevented from deviating. The guide wheel on the guide bracket rolls along the guide plate, so that the friction force between the guide bracket and the guide plate is reduced.

Preferably, one end of the steel cable connected with the connector is provided with a limiting block, and the limiting block is abutted against the end face of the inner cylinder. The diameter of the limiting block is larger than the inner diameter of the inner cylinder. The limiting block plays a limiting role, the sling is prevented from being separated from the inner barrel, and the reliability of connection of the connector and the sling is improved.

The invention has the beneficial effects that: the lifting platform can firmly fix the sling on the lifting platform through the connector, so that the sling is effectively prevented from being separated from the lifting platform, the lifting platform is prevented from falling, and the use safety of the lifter is improved.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is an enlarged view of a portion a in fig. 1.

Fig. 3 is an enlarged view of a portion B in fig. 1.

Fig. 4 is an enlarged view of the portion C in fig. 1.

Fig. 5 is an enlarged view of a portion D in fig. 4.

Fig. 6 is a schematic view of the structure of the connector.

Fig. 7 is a schematic structural view of the outer tub.

FIG. 8 is a schematic structural view of the inner barrel.

FIG. 9 is a schematic view of the clamp block when attached to the inner barrel.

Fig. 10 is a schematic structural view of the clamping block.

Fig. 11 is a cross-sectional view of the connector attached to a sling.

Fig. 12 is an enlarged view of a portion E of fig. 11.

In the figure: 1. the device comprises a vertical column, 2, a cross beam, 3, a winch, 4, a ladder stand, 5, an elevating platform, 6, a sling, 7, a pulley, 8, a motor, 9, a winding drum, 10, a connector, 11, a guide plate, 12, a guide support, 13, a guide wheel, 14, an outer cylinder, 15, an inner cylinder, 16, a clamping block, 17, a chute, 18, a guide inclined plane, 19, a guide groove, 20, a convex shaft, 21, a convex block, 22, an anti-skidding groove, 23, a limiting block, 24, a central shaft, 25, a rolling outer ring, 26 and a ball.

Detailed Description

The invention is further described by the following detailed description in conjunction with the accompanying drawings.

Example (b):

as shown in fig. 1 to 12, a hoist includes a column 1, a beam 2, and a lifting table 5. The upright post 1 is provided with two upright posts. The upright column 1 is arranged in the vertical direction. The outside of the upright post 1 is provided with a ladder stand 4. The ladder 4 is arranged along the axial direction of the upright 1. The cross beam 2 is arranged at the upper end of the upright 1. The beam 2 is perpendicular to the column 1. Pulleys 7 are arranged on two sides of the cross beam 2. The pulley 7 is rotatably connected to the cross beam. The two lifting tables 5 are arranged. The lifting platforms 5 are respectively connected on the upright posts 1 in a sliding way. The lifting platform 5 can move up and down along the upright 1. The column 1 is provided with a guide plate 11. The guide plate 11 is disposed along the axial direction of the column 1. One side of the lifting platform 5 close to the upright post 1 is provided with a guide bracket 12. Two guide wheels 13 are arranged on the guide support 12. The guide wheels 13 are arranged on two sides of the guide plate 11 in a pressing mode. The elevating table 5 is provided with a connector 10. The lower end of each upright post 1 is provided with a winch 3. The hoist 3 includes a motor 8 and a drum 9. The winding drum 9 is connected to the output shaft of the motor 8. The motor 8 is a reduction motor. The hoist cable 6 is wound around the drum 9. The end of the sling 6 remote from the drum 9 is passed over a pulley 7 and connected to a connector 10 provided on the lifting table 5.

The connector 10 includes an outer barrel 14 and an inner barrel 15. The outer cylinder 14 is cylindrical. The outer cylinder 14 is open at one end and closed at the other end. The inner cylinder 15 is cylindrical with both ends open. The inner cylinder 15 is disposed inside the outer cylinder 14. The inner cylinder 15 is disposed coaxially with the outer cylinder 14. The inner wall of the outer cylinder 14 is provided with a chute 17. The outer side of the inner cylinder 15 is provided with a protruding shaft 20 corresponding to the inclined groove 17. The protruding shaft 20 is slidably connected in the inclined groove 17. The protruding shaft 20 is slidable along the inclined groove 17. The protruding shaft 20 includes a central shaft 21 integrally formed with the inner cylinder 15. The central shaft 24 is sleeved with a rolling outer ring 25. Balls 26 are provided between the outer rolling ring 25 and the central shaft 24. The rolling outer ring is in rolling contact with the groove wall of the chute, so that the friction between the convex shaft and the chute is reduced. A plurality of guide grooves 19 are provided in the circumferential direction of the inner cylinder 15. In the present embodiment, four guide grooves 19 are provided. Each guide groove 19 is provided therein with a gripping block 16 that is radially movable along the inner cylinder 15. The clamping block 16 is provided with a projection 21 on the side thereof adjacent to the inner wall of the outer cylinder 14. The front end of the projection 21 is formed in a circular arc shape. The inner wall of the outer cylinder 14 is provided with a guide slope 18 corresponding to the projection 21. The projection 21 abuts against the guide slope 18. The slings 6 extend into the drum 15 and the gripping blocks 16 are located radially outwardly of the slings 6. The clamping block 16 clamps the sling 6. The clamping block 16 is provided with an anti-slip groove 22 at one side close to the sling 6. The end of the sling 6 is provided with a stop block 23. The stopper 23 is a cylinder. The diameter of the stopper 26 is larger than the inner diameter of the inner cylinder 15. The stopper 23 abuts against the end surface of the inner cylinder 15.

In the invention, the lifting platform moves up and down along the upright post under the traction of the winch. The outer cylinder is fixedly arranged on the lifting platform. The end part of the sling extends into the inner cylinder. The clamping block is clamped on the side surface of the sling. When the clamping block is subjected to the axial tension of the sling, the convex shaft arranged on the outer side of the inner cylinder can slide along the inclined groove, so that the inner cylinder and the outer cylinder rotate relatively. When the inner tube rotated with the urceolus relatively, the lug that sets up on pressing from both sides tight piece can remove along the direction inclined plane, and at this in-process, it can remove to the center of inner tube under the effect on direction inclined plane to press from both sides tight piece for press from both sides tight piece and can firmly press from both sides the hoist cable more, and the axial tension of hoist cable is big more, and it is big more also to press from both sides the clamp force of tight piece to the hoist cable, has effectively avoided hoist cable and elevating platform to take place to break away from like this, avoids the elevating platform to fall, improves the security. The anti-skidding grooves arranged on the clamping blocks can increase the friction force between the clamping blocks and the sling, and the sling is prevented from slipping from the clamping blocks.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims

1. The utility model provides a lifting machine, includes stand (1), elevating platform (5), hoist engine (3), it has hoist cable (6) to coil on hoist engine (3), be provided with connector (10) on elevating platform (5), the one end that hoist engine (3) were kept away from in hoist cable (6) links to each other its characterized in that with connector (10): the connector (10) comprises an outer cylinder (14) and an inner cylinder (15), a sling (6) extends into the inner cylinder (15), a chute (17) is arranged on the inner wall of the outer cylinder (14), a convex shaft (20) is arranged on the outer side of the inner cylinder (15), and the convex shaft (20) is connected in the chute (17) in a sliding manner; a plurality of guide grooves (19) are formed in the circumferential direction of the inner cylinder (15), clamping blocks (16) capable of moving along the radial direction of the inner cylinder (15) are arranged in the guide grooves (19), and anti-skidding grooves (22) are formed in one sides, close to the slings (6), of the clamping blocks (16); a clamping mechanism is arranged between the clamping block (16) and the outer cylinder (14), and when the inner cylinder (14) and the outer cylinder (15) rotate relatively, the clamping block (16) moves towards the center of the inner cylinder (15) under the action of the clamping mechanism.

2. A hoisting machine as defined in claim 1, characterized in that the clamping mechanism comprises a cam (21) arranged on the clamping block (16), the cam (21) being arranged on the clamping block (16) on the side thereof adjacent to the inner wall of the outer cylinder (14), the inner wall of the outer cylinder (14) being provided with a guide ramp (18) corresponding to the cam (21), the cam (21) abutting against the guide ramp (18).

3. The hoisting machine as claimed in claim 1, characterized in that the protruding shaft (20) comprises a central shaft (24) integrally formed with the inner drum (15), the central shaft (24) is sleeved with a rolling outer ring (25), and balls (26) are arranged between the rolling outer ring (25) and the central shaft (24).

4. A hoisting machine as claimed in claim 1, characterized in that the hoisting machine (3) comprises a motor (8) and a drum (9), the drum (9) being connected to the output shaft of the motor (8), the hoisting rope (6) being wound around the drum (9).

5. A hoisting machine as claimed in claim 1, characterized in that outside the column (1) there is arranged a ladder (4).

6. A hoisting machine as defined in claim 1, characterized in that the upper end of the column (1) is provided with a cross member (2), the cross member (2) is rotatably connected with a pulley (7), and one end of the sling (6) passes through the pulley (7) and is connected with the connector (10).

7. The hoisting machine as claimed in claim 1, characterized in that the column (1) is provided with a guide plate (11), the guide plate (11) is arranged in the axial direction of the column (1), a guide bracket (12) is arranged on the side of the lifting platform (5) close to the column (1), two guide wheels (13) are arranged on the guide bracket (12), and the guide wheels (13) are arranged on both sides of the guide plate (11) in a pressing manner.

8. The hoisting machine as recited in claim 1, characterized in that the end of the steel cable (6) connected to the connector (10) is provided with a stopper (23), and the stopper (23) abuts against the end surface of the inner cylinder (15).