Driving system of ship winch lifting device

Abstract

The driving system of the ship winch lifting device comprises a longitudinal winch lifting rail, a rail winch and a lifting goods shelf, and the rail winch moves in the rail direction of the longitudinal winch lifting rail; one side of the bottom end of the lifting goods shelf is fixed on the rail winch; the device further comprises a winch driving device, an upper fixed pulley and a lower fixed pulley. The lower fixed pulley is arranged on one side of the lower part of the lifting goods shelf; a traction cable led out from the winch driving device firstly crosses the lower side of the lower fixed pulley and then crosses the upper side of the upper fixed pulley, the traction cable crosses the upper side of the upper fixed pulley and extends downwards in a plumb bob shape, and the lower end is fixedly connected with the rail winch; and the safety of the lifted object in each stage of ascending, hovering and descending is improved.

Description

Technical Field

[0001] The invention belongs to the field of ship lifting devices. Background Art

[0002] Ship lifting devices are widely used, specifically for lifting large cargo holds, recovering and releasing lifeboats, and lifting marine equipment. Lifting devices are generally completed with a steel cable traction device, which drives the forward and reverse rotation of the rope drum through a motor to release or recover the traction cable.

[0003] In the existing traction rope-driven structure, no matter the object being lifted is rising, falling or hovering, the motor used to drive the rope drum forward and reverse always needs to bear a torque corresponding to the load. Once the motor fails and the torque is lost, the object being lifted is at risk of losing control and falling. Summary of the invention

[0004] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a drive system for a ship winch lifting device, which improves the safety of the lifted object in each stage of rising, hovering and descending.

[0005] Technical solution: To achieve the above-mentioned purpose, a driving system of a ship winch lifting device of the present invention includes a longitudinal winch lifting rail, a rail winch and a lifting shelf. The rail winch moves along the direction of the longitudinal winch lifting rail; one side of the bottom end of the lifting shelf is fixed on the rail winch.

[0006] It also includes a winch drive device, an upper fixed pulley and a lower fixed pulley; the upper fixed pulley is at the top of the lifting shelf, and the lower fixed pulley is at the lower side of the lifting shelf; the traction rope led out by the winch drive device first crosses the lower side of the lower fixed pulley and then crosses the upper side of the upper fixed pulley, and the traction rope crossing the upper side of the upper fixed pulley extends downward in a plumb shape, and the lower end is fixedly connected to the rail winch.

[0007] Furthermore, the winch drive device includes a chassis; a drive shaft and an output shaft are rotatably installed in the chassis through bearings; a gear a is coaxially fixedly installed on the drive shaft, and a gear b is coaxially fixedly installed on the output shaft, and gear a and gear b are meshed; a traction rope drum is coaxially fixedly installed on the extended end of the output shaft, and the traction rope drum leads out the traction rope.

[0008] Furthermore, one end of the driving shaft is a torque input end.

[0009] Furthermore, a ratchet wheel is coaxially fixedly mounted on the driving shaft; and a ratchet arm matching with the ratchet wheel is also included;

[0010] A number of ratchet teeth are distributed in a circular array outside the ratchet wheel, and the contour of the ratchet teeth includes a sloped side, a tooth top and a steep side, with a tooth groove formed between any two adjacent ratchet teeth. In the initial state, the pawl end of the pawl arm is stuck in any tooth groove. The end of the pawl arm away from the pawl end is integrally connected with a torsion plate, and the rotating hole of the torsion plate axis is coaxially rotatably mounted on the fixed shaft. The fixed shaft is fixed in the chassis, and a torsion spring is arranged outside the fixed shaft, and the torsion spring applies a clockwise torque to the torsion plate, so that the pawl end of the pawl arm tends to swing toward one side of the ratchet wheel.

[0011] Furthermore, a linkage bar is provided on one side of the ratchet, the middle part of which is rotatably mounted on a linkage bar shaft, and the linkage bar shaft is fixed to the chassis; one end of the linkage bar shaft is connected to the back side of the pawl end of the pawl arm through a wire rope; the other end of the linkage bar shaft is rotatably provided with a roller through a bearing.

[0012] A slow-descent driving wheel is arranged on the side of the linkage bar away from the ratchet wheel, the axis of the slow-descent driving wheel is rotatably mounted on the slow-descent wheel shaft through a bearing, and the slow-descent wheel shaft is fixed to the chassis; a plurality of roller driving cams are integrally arranged on the outer circumference of the slow-descent driving wheel in a circular array, one side of the roller driving cam is a roller driving inclined surface, and the other side is a step surface; the contour surface of the slow-descent driving wheel between any two adjacent roller driving cams is an arc contour surface.

[0013] Furthermore, in the initial state, the end of the pawl of the pawl arm is stuck in any tooth groove, the wire rope is straightened, and the roller rolls tangentially to the arc contour surface.

[0014] Further, based on the initial state, when the roller rolls from the arc profile surface to the roller driving inclined surface, the end of the ratchet of the ratchet arm is pulled outward from the tooth groove under the pulling of the wire rope; at this time, under the clockwise torsion of the torsion spring, the wire rope forms a reverse pulling force on one end of the linkage bar, and the linkage bar transmits the pulling force of the wire rope to the roller, so that the roller forms a rolling force F on the roller driving inclined surface, and the rolling force F forms a torsion on the slow-descent driving wheel, so that the slow-descent driving wheel has a tendency to rotate clockwise spontaneously;

[0015] Based on the initial state, when the end of the pawl originally in the tooth groove slides along the inclined surface to the tooth top, the wire rope automatically relaxes and bends.

[0016] Furthermore, a gear plate is coaxially arranged on the slow descent driving wheel, and also includes a driving gear meshing with the gear plate and a slow descent driving motor driving the driving gear.

[0017] Furthermore, a working method of a driving system of a ship winch lifting device, a safe slow-down process of the lifting shelf: suspending the torque input at the torque input end, so that the lifting shelf is suspended under the action of the ratchet, and at the same time, the slow-down drive motor drives the drive gear to rotate continuously clockwise.

[0018] Beneficial effect: During the safe slow-descent process of the lifting shelf of the present invention, as the slow-descent driving wheel continues to rotate counterclockwise, the ratchet is periodically locked and released, so that the shelf is periodically pulsed down, thereby achieving the purpose of continuous slow-descent and avoiding the accelerated descent of the shelf under the action of gravity; during the periodic pulsed descent of the shelf, when active hovering is required or the motor used to drive the driving gear loses power due to an accident, the slow-descent driving wheel automatically stops rotating. If the roller is at the end of the roller driving inclined surface at this time, the wire rope is forced to rotate under the clockwise torsion of the torsion spring. One end of the linkage bar forms a reverse pulling force, and the linkage bar transmits the pulling force of the wire rope to the roller, so that the roller forms a rolling force F on the roller driving inclined surface, and the rolling force F forms a torque on the slow-descent driving wheel, so that the slow-descent driving wheel rotates spontaneously clockwise until the slow-descent driving wheel is tangent to the arc contour surface. At this time, driven by the gravity of the shelf, the ratchet rotates counterclockwise, and then the steep side of the ratchet tooth body presses against the end of the ratchet arm, thereby blocking the counterclockwise rotation of the ratchet, and then the traction cable drum stops rotating, thereby achieving the purpose of automatic safe hovering and active hovering during the periodic pulsed descent of the shelf. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is the overall schematic diagram of the lifting device;

[0020] Figure 2 for Figure 1 A-direction schematic diagram;

[0021] Figure 3 is a cross-sectional transmission structure schematic diagram of a winch drive device;

[0022] Figure 4 It is a schematic diagram of the ratchet transmission structure in the initial state;

[0023] Figure 5 The schematic diagram of the steel wire rope of the ratchet transmission structure is in a relaxed and bent state;

[0024] Figure 6 It is a schematic diagram of the rolling force F formed by the roller on the roller driving inclined surface. DETAILED DESCRIPTION

[0025] The present invention will be further described below in conjunction with the accompanying drawings.

[0026] As attached Figures 1 to 6 A driving system of a ship winch lifting device as shown, Figure 1 and 2As shown, it includes a longitudinal winch lifting rail 31, a rail winch 36 and a lifting shelf 31. The rail winch 36 is installed on the longitudinal winch lifting rail 31, and the rail winch 36 moves along the track direction of the longitudinal winch lifting rail 31; one side of the bottom end of the lifting shelf 31 is fixed on the rail winch 36; it also includes a winch driving device 29, an upper fixed pulley 33 and a lower fixed pulley 35; the upper fixed pulley 33 is at the top of the lifting shelf 31, and the lower fixed pulley 35 is at the lower side of the lifting shelf 31; the traction rope 28 led out by the winch driving device 29 first crosses the lower side of the lower fixed pulley 35 and then crosses the upper side of the upper fixed pulley 33. The traction rope 28 crossing the upper side of the upper fixed pulley 33 extends downward in a plumb shape, and the lower end is fixedly connected to the rail winch 36. Driven by the winch driving device 29, the traction rope 28 pulls the rail winch 36 to move up and down.

[0027] like Figure 3 As shown, the winch drive device 29 includes a casing 2 which is fixedly mounted on a plurality of structural supports 20 .

[0028] A drive shaft 5 and an output shaft 27 are rotatably installed in the chassis 2 through bearings; a gear a 26 is coaxially fixedly installed on the drive shaft 5, and a gear b 22 is coaxially fixedly installed on the output shaft 27, and the gear a 26 meshes with the gear b 22; a traction cable drum 25 is coaxially fixedly installed on the extended end of the output shaft 27, and the traction cable drum 25 leads out a traction cable 28.

[0029] One end of the driving shaft 5 is a torque input end 23 , and the torque input end 23 is connected to a motor or a handle.

[0030] A ratchet 4 is coaxially fixedly mounted on the driving shaft 5; it also includes a ratchet arm 7 that matches the ratchet 4; a plurality of ratchet teeth 1 are distributed in a circumferential array outside the ratchet 4, the profile of the ratchet tooth 1 includes an inclined side 1a, a tooth top 1b and a steep side 1c, and a tooth groove 3 is formed between any two adjacent ratchet teeth 1; in the initial state, the ratchet end 6 of the ratchet arm 7 is stuck in any one of the tooth grooves 3; the end of the ratchet arm 7 away from the ratchet end 6 is integrally connected with a torsion plate 9, and the rotating hole of the axis of the torsion plate 9 is coaxially rotatably mounted on the fixed shaft 8; the fixed shaft 8 is fixed in the chassis 2, and a torsion spring 11 is arranged outside the fixed shaft 8, and the torsion spring 11 applies a clockwise torque to the torsion plate 9, so that the ratchet end 6 of the ratchet arm 7 tends to swing toward one side of the ratchet 4;

[0031] When the traction cable drum 25 is winding, the ratchet 4 rotates clockwise. During the clockwise rotation of the ratchet 4, the pawl end 6 originally in the tooth groove 3 slides along the inclined side 1a to the tooth top 1b, and then jumps to the next tooth groove 3 on the steep side 1c; when the ratchet 4 rotates counterclockwise, the steep side 1c of the ratchet tooth body 1 presses against the pawl end 6 of the pawl arm 7.

[0032] A linkage bar 19 is provided on one side of the ratchet 4, and the middle part of the linkage bar 19 is rotatably mounted on the linkage bar shaft 13, and the linkage bar shaft 13 is fixed to the chassis 2; one end of the linkage bar shaft 13 is connected to the back side of the pawl end 6 of the pawl arm 7 through the wire rope 12; the other end of the linkage bar shaft 13 is rotatably provided with a roller 14 through a bearing; a slow-descent driving wheel 18 is provided on the side of the linkage bar 19 away from the ratchet 4, and the axis of the slow-descent driving wheel 18 is rotatably mounted on the slow-descent wheel shaft 15 through a bearing, and the slow-descent wheel shaft 15 is fixed to the chassis 2; the outer periphery of the slow-descent driving wheel 18 is integrally provided with a plurality of roller driving convex teeth 2 in a circular array, one side of the roller driving convex tooth 2 is a roller driving inclined surface 2a, and the other side is a step surface 2b; the contour surface of the slow-descent driving wheel 18 between any two adjacent roller driving convex teeth 2 is an arc contour surface 17.

[0033] In the initial state, if Figure 4 As shown, the pawl end 6 of the pawl arm 7 is stuck in any tooth groove 3, the wire rope 12 is straightened, and the roller 14 rolls on the tangent arc profile surface 17.

[0034] On the basis of the initial state, when the roller 14 rolls from the arc profile surface 17 to the roller driving inclined surface 2a, the pawl end 6 of the pawl arm 7 is pulled outward from the tooth groove 3 by the pull of the wire rope 12; at this time, under the clockwise torsion of the torsion spring 11, the wire rope 12 forms a reverse pulling force on one end of the linkage bar 19, and the linkage bar 19 transmits the pulling force of the wire rope 12 to the roller 14, so that the roller 14 forms a rolling force F on the roller driving inclined surface 2a, and the rolling force F forms a torsion force on the slow-descent driving wheel 18, so that the slow-descent driving wheel 18 has a tendency to rotate clockwise spontaneously, as shown in FIG. Figure 6 shown.

[0035] On the basis of the initial state, when the pawl end 6 in the tooth groove 3 slides along the inclined surface side 1a to the tooth top 1b, the wire rope 12 automatically relaxes and bends, such as Figure 5 As shown; a gear plate 16 is coaxially arranged on the slow-descent driving wheel 18, and also includes a driving gear 72 meshing with the gear plate 16 and a slow-descent driving motor driving the driving gear 72 connected to the slow-descent driving wheel 18.

[0036] Working principle: Safe lifting and hovering process of lifting shelf 31:

[0037] On the basis of the initial state, a rotation torque is input to the torque input end 23 manually or by a motor, so that the a gear 26 drives the b gear 22, and then the traction cable drum 25 is wound up, so that the traction cable 28 pulls the track winch 36 and the lifting shelf 31 to move upward; in the above process, since the ratchet 4 is synchronized on the drive shaft 5, the ratchet 4 will rotate synchronously with the a gear 26 clockwise during the rising process of the lifting shelf 31; during the clockwise rotation of the ratchet 4, the pawl end 6 originally in the tooth groove 3 slides along the inclined side 1a to the tooth top 1b, and then the pawl end 6 is moved on the steep side under the action of the torsion spring 11. The surface side 1c jumps to the next tooth groove 3, and the cycle is repeated. At the same time, the steel wire rope 12 is periodically straightened and relaxed and bent; when active hovering is performed or the torque input end 23 loses power due to an accident, the input torque of the torque input end 23 disappears. At this time, the lifting shelf 31 automatically descends under the action of gravity, so that the ratchet 4 rotates counterclockwise with the gear a 26. When the ratchet 4 rotates counterclockwise, the steep surface side 1c of the ratchet tooth body 1 abuts against the pawl end 6 of the pawl arm 7, thereby blocking the counterclockwise rotation of the ratchet 4, and then the traction cable drum 25 stops rotating, thereby achieving the purpose of automatic safe hovering and active hovering when power is lost;

[0038] Safe descent process of lifting shelf 31:

[0039] The torque input of the torque input end 23 is paused, so that the lifting shelf 31 is suspended under the action of the ratchet 4. At the same time, the slow-descent drive motor drives the drive gear 72 to rotate continuously clockwise, thereby causing the slow-descent drive wheel 18 to rotate continuously counterclockwise along the axis. During the continuous counterclockwise rotation of the slow-descent drive wheel 18, the roller 14 will periodically roll from the arc profile surface 17 to the roller drive inclined surface 2a and then jump back to the arc profile surface 17, and so on. When the roller 14 rolls from the arc profile surface 17 to the end of the roller drive inclined surface 2a, the pawl end 6 of the pawl arm 7 just disengages from the tooth groove 3 outward under the traction of the wire rope 12, so that the pawl end 6 loses the constraint on the ratchet 4, and driven by the gravity of the lifting shelf 31 itself, the ratchet 4 actively rotates counterclockwise, so that the lifting shelf 31 The shelf 31 moves downward for a distance under the action of its own gravity. After the roller 14 rolls from the arc profile surface 17 to the end of the roller driving inclined surface 2a, it will quickly jump onto the arc profile surface 17 under the pulling of the wire rope 12. When the ratchet 4 jumps onto the arc profile surface 17, the counterclockwise rotation of the ratchet 4 causes the steep surface side 1c of the ratchet tooth body 1 to abut against the ratchet end 6 of the ratchet arm 7, thereby blocking the counterclockwise rotation of the ratchet 4, and then the traction cable drum 25 stops rotating, and the lifting shelf 31 stops descending. According to this rule, as the slow-descent driving wheel 18 continues to rotate counterclockwise, the ratchet 4 is periodically locked and released, so that the shelf 31 is periodically pulsed and descends, thereby achieving the purpose of continuous slow descent and preventing the shelf 31 from accelerating under the action of gravity.

[0040] During the periodic pulsed descent of the shelf 31, when active hovering is required or the motor driving the driving gear 72 loses power due to an accident, the slow-descent driving wheel 18 automatically stops rotating. If the roller 14 is just at the end of the roller driving inclined surface 2a at this time, under the clockwise torsion of the torsion spring 11, the wire rope 12 forms a reverse pulling force on one end of the linkage bar 19, and the linkage bar 19 transmits the pulling force of the wire rope 12 to the roller 14, so that the roller 14 forms a rolling force F on the roller driving inclined surface 2a, as shown in FIG. Figure 6 As shown, the rolling force F forms a torque on the slow-descent driving wheel 18, causing the slow-descent driving wheel 18 to rotate spontaneously clockwise until the slow-descent driving wheel 18 is tangent to the arc contour surface 17. At this time, driven by the gravity of the shelf 31, the ratchet 4 rotates counterclockwise, and then the steep side 1c of the ratchet tooth body 1 abuts against the pawl end 6 of the pawl arm 7, thereby blocking the counterclockwise rotation of the ratchet 4, and then the traction cable drum 25 stops rotating, thereby achieving the purpose of automatic safe hovering and active hovering during the periodic pulsed descent of the shelf 31.

[0041] The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A drive system for a ship winch lifting device, characterized in that: It comprises a longitudinal winch lifting track (31), a track winch (36) and a lifting shelf (31), wherein the track winch (36) moves along the track direction of the longitudinal winch lifting track (31); one side of the bottom end of the lifting shelf (31) is fixed on the track winch (36); It also includes a winch drive device (29), an upper fixed pulley (33) and a lower fixed pulley (35); the upper fixed pulley (33) is located at the top of the lifting shelf (31), and the lower fixed pulley (35) is located at one side of the lower part of the lifting shelf (31); the traction rope (28) led out by the winch drive device (29) first crosses the lower side of the lower fixed pulley (35) and then crosses the upper side of the upper fixed pulley (33); the traction rope (28) crossing the upper side of the upper fixed pulley (33) extends downward in a plumb bob shape, and the lower end is fixedly connected to the rail winch (36).

2. The driving system of a ship winch lifting device according to claim 1, characterized in that: The winch drive device (29) comprises a case (2); a drive shaft (5) and an output shaft (27) are rotatably mounted in the case (2) via bearings; an a gear (26) is coaxially fixedly mounted on the drive shaft (5), a b gear (22) is coaxially fixedly mounted on the output shaft (27), and the a gear (26) is meshed with the b gear (22); a traction rope drum (25) is coaxially fixedly mounted on the extended end of the output shaft (27), and the traction rope drum (25) leads out the traction rope (28).

3. The driving system of a ship winch lifting device according to claim 2, characterized in that: One end of the driving shaft (5) is a torque input end (23).

4. The driving system of a ship winch lifting device according to claim 3, characterized in that: The driving shaft (5) is coaxially fixedly mounted with a ratchet wheel (4); and also includes a ratchet arm (7) matched with the ratchet wheel (4); A plurality of ratchet teeth (1) are distributed in a circular array outside the ratchet wheel (4), and the profile of the ratchet teeth (1) includes an inclined surface side (1a), a tooth top (1b) and a steep surface side (1c), and a tooth groove (3) is formed between any two adjacent ratchet teeth (1); in an initial state, the ratchet end (6) of the ratchet arm (7) is stuck in any one of the tooth grooves (3); the end of the ratchet arm (7) away from the ratchet end (6) is integrally connected with a torsion disk (9), and the rotating hole of the axis of the torsion disk (9) is coaxially rotatably mounted on the fixed shaft (8); the fixed shaft (8) is fixed in the chassis (2), and a torsion spring (11) is arranged outside the fixed shaft (8), and the torsion spring (11) applies a clockwise torque to the torsion disk (9), so that the ratchet end (6) of the ratchet arm (7) has a tendency to swing toward one side of the ratchet wheel (4).

5. The driving system of a ship winch lifting device according to claim 4, characterized in that: A linkage bar (19) is arranged on one side of the ratchet wheel (4), and the middle part of the linkage bar (19) is rotatably mounted on a linkage bar shaft (13), and the linkage bar shaft (13) is fixed to the chassis (2); one end of the linkage bar shaft (13) is connected to the back side of the pawl end (6) of the pawl arm (7) by pulling through a steel wire rope (12); the other end of the linkage bar shaft (13) is rotatably provided with a roller (14) through a bearing; A slow-descent driving wheel (18) is arranged on the side of the linkage bar (19) away from the ratchet wheel (4); the axis of the slow-descent driving wheel (18) is rotatably mounted on a slow-descent wheel shaft (15) via a bearing; the slow-descent wheel shaft (15) is fixed to the chassis (2); a plurality of roller driving convex teeth (2) are integrally arranged on the outer circumference of the slow-descent driving wheel (18) in a circular array; one side of the roller driving convex teeth (2) is a roller driving inclined surface (2a) and the other side is a step surface (2b); and the contour surface of the slow-descent driving wheel (18) between any two adjacent roller driving convex teeth (2) is a circular arc contour surface (17).

6. A driving system for a ship winch lifting device according to claim 5, characterized in that: In the initial state, the pawl end (6) of the pawl arm (7) is stuck in any tooth groove (3), the wire rope (12) is stretched straight, and the roller (14) rolls tangentially to the arc profile surface (17).

7. A driving system for a ship winch lifting device according to claim 6, characterized in that: On the basis of the initial state, when the roller (14) rolls from the arc profile surface (17) to the roller drive inclined surface (2a), the ratchet end (6) of the ratchet arm (7) is pulled outward from the tooth groove (3) by the pull of the steel wire rope (12); at this time, under the clockwise torsion of the torsion spring (11), the steel wire rope (12) forms a reverse pulling force on one end of the linkage bar (19), and the linkage bar (19) transmits the pulling force of the steel wire rope (12) to the roller (14), so that the roller (14) forms a rolling force F on the roller drive inclined surface (2a), and the rolling force F forms a torsion force on the slow-descent driving wheel (18), so that the slow-descent driving wheel (18) has a tendency to rotate clockwise spontaneously; Based on the initial state, when the pawl end (6) originally in the tooth groove (3) slides along the inclined surface side (1a) to the tooth top (1b), the steel wire rope (12) automatically relaxes and bends.

8. The driving system of a ship winch lifting device according to claim 7, characterized in that: The slow-descent driving wheel (18) is coaxially and integrally provided with a gear plate (16), and further comprises a driving gear (72) meshing with the gear plate (16) and a slow-descent driving motor driving and connected to the driving gear (72).

9. A working method of a driving system of a ship winch lifting device according to claim 8, characterized in that: The safe slow-descent process of the lifting shelf (31): the torque input of the torque input end (23) is suspended, so that the lifting shelf (31) is suspended under the action of the ratchet (4), and at the same time, the slow-descent drive motor drives the drive gear (72) to rotate continuously clockwise.

Images