CN110104131B

CN110104131B - Lifting device

Info

Publication number: CN110104131B
Application number: CN201810100883.1A
Authority: CN
Inventors: 沈荣富
Original assignee: T J Elevator Engineering Co ltd
Current assignee: T J Elevator Engineering Co ltd
Priority date: 2018-02-01
Filing date: 2018-02-01
Publication date: 2021-07-20
Anticipated expiration: 2038-02-01
Also published as: CN110104131A

Abstract

The invention relates to a lifting device. The lifting device comprises a rotating part, a lifting counterweight part and a traction rope. The rotating member is used for driving a lifting carrier. The lifting counterweight piece is arranged below the rotating piece. The traction rope is wound on the rotating piece and the lifting counterweight piece, and is provided with a connecting end and a fixed end, the connecting end is connected with the lifting carrier, and the fixed end is opposite to the connecting end. The invention can improve the safety of the crew for boarding the ship.

Description

Lifting device

Technical Field

The invention relates to a lifting device.

Background

It is known that large ships (such as cargo tanks, oil tankers, etc.) have a hull height of several stories, so that when a crewman rides a boat to climb a ship on the sea, the crewman generally needs to climb a rope ladder to complete the boarding action. However, since the boat on which the crew rides floats up and down along the sea surface, in other words, the distance between the boat and the rope ladder changes as the sea surface moves up and down, the crew must grasp the time point for climbing up the rope ladder by himself or herself in order to smoothly climb up the rope ladder. However, the up-and-down movement of the sea surface is difficult to be expected, and thus, the crew often falls into the sea unfortunately because the time point for climbing the rope ladder is not well known.

Therefore, there is a need to provide an innovative and advanced lifting device to solve the above problems.

Disclosure of Invention

In one embodiment, a lifting device includes a rotating member, a lifting weight member, and a pulling cable. The rotating member is used for driving a lifting carrier. The lifting counterweight piece is arranged below the rotating piece. The traction rope is wound on the rotating piece and the lifting counterweight piece, and is provided with a connecting end and a fixed end, the connecting end is connected with the lifting carrier, and the fixed end is opposite to the connecting end.

The invention can improve the safety of the crew for boarding the ship.

Drawings

Fig. 1 shows a schematic structural diagram of the lifting device of the present invention.

Fig. 2 shows a schematic structural diagram of the clutch driving unit of the present invention.

FIG. 3 is a schematic diagram of the operation of the clutch driving unit of the present invention to disengage the fixed pulley.

FIG. 4 is a schematic diagram of a tension sensor of the elevator apparatus according to the present invention.

FIG. 5A is a schematic diagram of the operation of the tension sensor when the tension of the pulling rope is in a tensioned state according to the present invention.

FIG. 5B is a schematic diagram showing the operation of the tension sensor when the tension state of the pulling rope is a slack state.

Fig. 6A to 6F are schematic views showing respective actions of the lifting device applied to a riding wheel.

Reference numerals

1 lifting device

10 rotating part

11 fixed pulley

12 Clutch drive unit

121 electric motor shaft member

122 magnetic sheet

123 metal disc

124 expansion piece

125 electromagnet

20 lifting counterweight

21 movable pulley

22 counterweight

30 pulling rope

30C connecting end

30F fixed end

31 first cable segment

32 second rope segment

33 third rope segment

40 lifting carrier

50 tension sensor

51 mechanical sensing part

511 combination seat

512 moving rod

513 roller element

514 spring

52 light sensing part

2 ship

B boat

P crew

W water flow

Detailed Description

Referring to fig. 1, a schematic structural diagram of the lifting device of the present invention is shown. The lifting device 1 of the present invention comprises a rotating member 10, a lifting weight member 20 and a pulling rope 30.

The rotor 10 is used to drive a lifting carrier 40. In one embodiment, the lift vehicle 40 can be used to carry a boat rider.

The rotor 10 includes a fixed pulley 11 and a clutch driving unit 12. The fixed pulley 11 has a controlled rotation mode and a free rotation mode. The clutch driving unit 12 can selectively connect or disconnect the fixed pulley 11 so that the fixed pulley 11 can perform the controlled rotation mode and the free rotation mode. In the controlled rotation mode, the clutch driving unit 12 is coupled to the fixed pulley 11 to control the fixed pulley 11 to rotate, so as to drive the lifting/lowering carrier 40 to ascend, descend or stop ascending/descending. In the free-wheeling mode, the clutch drive unit 12 disengages the fixed sheave 11 to allow the fixed sheave 11 to rotate freely (freewheel).

In one embodiment, the controlled rotation mode is initiated when the lift vehicle 40 is about to ascend, descend, or stop.

In one embodiment, the free-wheeling mode is initiated when the lift vehicle 40 is lowered to a water surface or a floating carrier surface.

In one embodiment, the clutch driving unit 12 can be a mechanical clutch module, a magnetic coupling clutch module, or an oil pressure clutch module.

Fig. 2 shows a schematic structural diagram of the clutch driving unit of the present invention. Referring to fig. 1 and 2, in an embodiment, the clutch driving unit 12 may include a motor shaft 121, a magnetic sheet 122, a metal plate 123, a telescopic member 124, and an electromagnet 125. The two ends of the motor shaft 121 can be respectively coupled to the fixed pulley 11 and the magnetic sheet 122, the expansion member 124 can be coupled between the metal plate 123 and the electromagnet 125, and the fixed pulley 11 can be controlled to perform the controlled rotation mode and the free rotation mode by controlling the metal plate 123 to be coupled with or decoupled from the magnetic sheet 122.

The lifting weight 20 is disposed below the rotating member 10 for moving synchronously with the lifting vehicle 40 in the free rotation mode. In the present embodiment, the moving direction of the lifting weight 20 is opposite to the moving direction of the lifting vehicle 40, and preferably, the weight of the lifting weight 20 is smaller than the weight of the lifting vehicle 40, so that the lifting weight 20 can synchronously cooperate with the movement of the lifting vehicle 40.

FIG. 3 is a schematic diagram of the operation of the clutch driving unit of the present invention to disengage the fixed pulley. Referring to fig. 1 and 3, in one embodiment, the lifting weight 20 includes a movable pulley 21. Preferably, the weight of the movable pulley 21 is smaller than that of the lifting vehicle 40. In addition, the lifting weight 20 may further include a weight 22, the weight 22 is pivotally connected to the movable pulley 21, and preferably, the sum of the weight of the movable pulley 21 and the weight 22 is smaller than the weight of the lifting vehicle 40. In one embodiment, the weight of the counterweight 22 can be adjusted according to the weight of the lift vehicle 40. In one embodiment, the lifting device 1 may include a pulley rail (not shown), and the movable pulley 21 may slide up and down along the pulley rail.

The pulling rope 30 is wound around the rotating member 10 and the lifting weight member 20. In this embodiment, the pulling rope 30 is wound around the fixed pulley 11 of the rotating member 10 and the movable pulley 21 of the counterweight member 20. In one embodiment, the pull cable 30 is a wire rope or chain.

The traction rope 30 has a connecting end 30C and a fixed end 30F, the connecting end 30C is connected to the lifting carrier 40, the fixed end 30F is opposite to the connecting end 30C, and the position of the fixed end 30F is not lower than that of the connecting end 30C. In one embodiment, the fixed end 30F may be coupled to a boat hull (not shown).

In the present embodiment, the pulling cable 30 has a first cable segment 31, a second cable segment 32 and a third cable segment 33. The first cable segment 31 is located to the right of the rotary member 10. The second cable segment 32 is located to the left of the rotating member 10 and to the right of the lifting weight 20. The third cable section 33 is located to the left of the lifting weight 20.

In order to save space for the lifting device 1, it is preferable that the second cable segment 32 is parallel to the first cable segment 31, and the third cable segment 33 is parallel to the second cable segment 32.

FIG. 4 is a schematic diagram of a tension sensor of the elevator apparatus according to the present invention. FIG. 5A is a schematic diagram of the operation of the tension sensor when the tension of the pulling rope is in a tensioned state according to the present invention. FIG. 5B is a schematic diagram showing the operation of the tension sensor when the tension state of the pulling rope is a slack state. Referring to fig. 4, 5A and 5B, in an embodiment, the lifting device 1 may include a tension sensor 50, the tension sensor 50 is electrically connected to the clutch driving unit 12, and the tension sensor 50 is configured to sense a tension state of the traction cable 30, where the tension state includes a tension state and a slack state. As shown in fig. 4 and 5A, when the tension sensor 50 detects that the tension state of the traction cable 30 is a tension state, the clutch driving unit 12 is connected to the fixed pulley 11 to make the fixed pulley 11 enter the controlled rotation mode, so as to control the lifting/lowering vehicle 40 to perform operations such as lifting, lowering or stopping lifting. As shown in fig. 4 and 5B, when the tension sensor 50 detects that the tension state of the traction cable 30 is a slack state, the clutch driving unit 12 disengages the fixed pulley 11 to enable the fixed pulley 11 to enter the free rotation mode, at this time, the fixed pulley 11 can synchronously rotate along with the floating of the lifting vehicle 40, and the lifting weight 20 can provide a reverse force to drag the lifting vehicle 40 and can prevent the traction cable 30 from being released from the fixed pulley 11.

Referring to fig. 4, 5A and 5B, in an embodiment, the tension sensor 50 includes a mechanical sensing portion 51 and a light sensing portion 52. The mechanical sensing portion 51 contacts the pulling cable 30, and the optical sensing portion 52 detects the displacement change of the mechanical sensing portion 51 to determine the tension state of the pulling cable 30.

The mechanical sensing part 51 includes a coupling seat 511, a moving rod 512, a roller member 513 and a spring 514. The moving rod 512 penetrates the coupling seat 511. The roller member 513 is connected to one end of the moving rod 512, and the roller member 513 contacts the cable 30. The spring 514 is sleeved on the moving rod 512, and two ends of the spring 514 respectively abut against the combining seat 511 and the roller 513.

The light sensing portion 52 detects the displacement change of the moving rod 512 to determine the tension state of the pulling cable 30.

In one embodiment, the tension sensor 50 can be a pressure sensor, which contacts the lanyard 30 to sense the tension state of the lanyard 30.

Referring to fig. 6A to 6F, schematic diagrams of actions of the lifting device applied to a wheel climbing are respectively shown. As shown in fig. 6A, the lifting device 1 can be mounted on a ship 2. Referring to fig. 5A and 6B, when a crewman P rides on a boat B to ride on a wheel, the fixed pulley 11 of the rotating member 10 enters the controlled rotation mode, the tension sensor 50 detects that the tension state of the traction cable 30 is a tension state, and the clutch driving unit 12 is connected to the fixed pulley 11 and drives the fixed pulley 11 to rotate clockwise, so as to lower the lifting vehicle 40.

Referring to fig. 5B and 6C, when the lifting vehicle 40 descends to the water surface, the descending speed of the lifting vehicle 40 is slowed down due to the tension on the lifting vehicle 40 from the water surface, and the tension state of the traction cable 30 detected by the tension sensor 50 is instantly changed to a slack state, so as to actuate the clutch driving unit 12 to disengage from the fixed pulley 11, so that the fixed pulley 11 enters the free rotation mode, in which the fixed pulley 11 synchronously rotates along with the floating of the lifting vehicle 40, and the reverse acting force provided by the lifting weight 20 drags the lifting vehicle 40 and prevents the traction cable 30 from loosening from the fixed pulley 11. In addition, after the lifting vehicle 40 is lowered to the water surface, the boat B can be connected to the lifting vehicle 40 by a connecting member (not shown) so that the boat B and the lifting vehicle 40 can float along with the water surface.

As shown in fig. 6D, when the boat B is jacked up by the water flow W, the lifting vehicle 40 moves upward together with the boat B, so that the distance between the lifting vehicle 40 and the boat B is not changed by the fluctuation of the water flow W, thereby ensuring that the crew P can safely board the lifting vehicle 40.

As shown in fig. 6E, after the crew P gets on the lifting vehicle 40, the boat B can be detached from the lifting vehicle 40, and the fixed pulley 11 enters the controlled rotation mode again, at which time the clutch driving unit 12 drives the fixed pulley 11 to rotate counterclockwise, so as to lift the lifting vehicle 40. As shown in fig. 6F, after the lifting/lowering vehicle 40 is lifted to a proper position, the crew P can smoothly climb the wheel.

As described above, in the lifting apparatus 1 of the present invention, the clutch driving unit 12 of the rotating member 10 is used to control different rotation modes of the fixed pulley 11, and the lifting counterweight member 20 is used to match the lifting of the lifting vehicle 40 and to adjust the tension state of the stay cable 30, so that the lifting vehicle 40 and the boat B can synchronously float up and down, and the distance between the lifting vehicle 40 and the boat B is ensured not to be changed by the fluctuation of the water flow W, thereby improving the safety of the crew in boarding. In addition, the lifting device 1 of the present invention can be applied to other water work apparatuses as well as a riding wheel.

The above embodiments are merely illustrative of the principles and effects of the present invention, and not restrictive, and therefore modifications and variations such as those skilled in the art may be made without departing from the spirit of the present invention. The scope of the invention is to be determined by the following claims.

Claims

1. A lifting device, comprising:

a rotating member for driving a lifting carrier;

the lifting counterweight part is arranged below the rotating part; and

the traction rope is wound on the rotating piece and the lifting counterweight piece and is provided with a connecting end and a fixed end, the connecting end is connected with the lifting carrier, and the fixed end is opposite to the connecting end;

the rotating part comprises a fixed pulley and a clutch driving unit, and the traction rope is wound on the fixed pulley; the clutch driving unit can be selectively connected with or disconnected from the fixed pulley;

the clutch driving unit can comprise a motor shaft piece, a magnetic sheet, a metal disc, a telescopic piece and an electromagnet, wherein two ends of the motor shaft piece can be respectively combined with the fixed pulley and the magnetic sheet, the telescopic piece can be combined between the metal disc and the electromagnet, and the fixed pulley can be controlled to carry out a controlled rotation mode and a free rotation mode in an auxiliary mode by controlling the metal disc to be connected with or separated from the magnetic sheet.

2. The lift apparatus as recited in claim 1 wherein said fixed pulley has a controlled rotation mode, said controlled rotation mode comprising said clutch drive unit engaging said fixed pulley to control rotation of said fixed pulley.

3. The lift apparatus of claim 1, wherein the fixed sheave has a free-wheeling mode, the free-wheeling mode including the clutching drive unit disengaging the fixed sheave to allow free-wheeling of the fixed sheave.

4. The lift device of claim 1, wherein the lift weight includes a movable pulley about which the traction cable is routed.

5. The lift device of claim 4, wherein the lift weight further comprises a counterweight pivotally coupled to the movable pulley.

6. The lifting device as claimed in claim 5, wherein the sum of the weights of the movable pulley and the counterweight is less than the weight of the lifting vehicle.

7. The lift device of claim 1, wherein the lift weight has a weight less than a weight of the lift vehicle.

8. The lift device of claim 1, wherein the lift weight moves in a direction opposite to a direction of movement of the lift vehicle.

9. The lifting device as claimed in claim 1, wherein the fixed end of the traction rope is not located lower than the connecting end.

10. The lift device of claim 1, wherein the traction cable has a first cable segment located to the right of the rotating member, a second cable segment located to the left of the rotating member and the right of the lifting weight, and a third cable segment located to the left of the lifting weight.

11. The lift device of claim 10 wherein the second cable segment is parallel to the first cable segment and the third cable segment is parallel to the second cable segment.

12. The lift device of claim 1 wherein the fixed end of the tow rope is attached to a boat hull.

13. The lift device of claim 1, further comprising a tension sensor for sensing a tension state of the traction cable, the tension state including a tension state and a slack state.

14. The lift device as claimed in claim 13, wherein the rotating member includes a fixed pulley and a clutch driving unit, the traction cable is wound around the fixed pulley, the clutch driving unit can be selectively coupled to or decoupled from the fixed pulley, and the tension sensor is electrically connected to the clutch driving unit.

15. The lift apparatus of claim 14, wherein the clutch driving unit is coupled to the fixed pulley when the tension sensor detects that the tension state of the traction cable is a tension state.

16. The lift apparatus of claim 14, wherein the clutch driving unit disengages the fixed pulley when the tension sensor detects that the tension state of the traction cable is a slack state.

17. The lifting device as claimed in claim 13, wherein the tension sensor includes a mechanical sensing portion and a light sensing portion, the mechanical sensing portion contacts the pulling rope, and the light sensing portion detects a displacement change of the mechanical sensing portion to determine the tension state of the pulling rope.

18. The lifting device as claimed in claim 17, wherein the mechanical sensing portion comprises a coupling seat, a moving rod, a roller member and a spring, the moving rod penetrates through the coupling seat, the roller member is connected to one end of the moving rod, the spring is sleeved on the moving rod, and two ends of the spring respectively abut against the coupling seat and the roller member.

19. The lift device of claim 18, wherein the roller contacts the cable and the light sensor detects a change in displacement of the movable rod.