CN218841444U

CN218841444U - Upper limiting protection device

Info

Publication number: CN218841444U
Application number: CN202222968419.9U
Authority: CN
Inventors: 杜春江; 邓旭毅; 李国昌; 马倩云; 林云志; 陈嘉庆
Original assignee: South China Marine Machinery Co Ltd
Current assignee: South China Marine Machinery Co Ltd
Priority date: 2022-11-08
Filing date: 2022-11-08
Publication date: 2023-04-11
Anticipated expiration: 2032-11-08

Abstract

The utility model provides an upper limit protection device for set up between davit and lifting hook, including the weight, travel switch, first rigidity piece and second rigidity piece, travel switch sets up on the davit, the one end of first rigidity piece links to each other with the weight, the other end of first rigidity piece links to each other with travel switch, the one end of second rigidity piece links to each other with the davit, the other end of second rigidity piece links to each other with the weight, the weight setting is between davit and lifting hook, travel switch does not open and the second rigidity piece is in lax state when first rigidity piece is in taut state, travel switch opens the utilization when first rigidity piece is in lax state the utility model discloses a device, the convenience is to limit structure's repair.

Description

Upper limiting protection device

Technical Field

The utility model belongs to the lifting hook field especially relates to an go up spacing protection device.

Background

The crane is used for hoisting and loading and unloading goods, the goods are generally hoisted by the lifting hook in the crane, when the goods are lifted and move in the air, the goods can be influenced by other external environments, so that the shaking condition occurs, and the goods need to be stopped from moving upwards after being lifted to a certain height, so that the lifting hook needs to be limited upwards, in the existing upper limiting structure, a sensing block is generally arranged on the lifting hook, a forming switch is arranged on the crane, then the limiting information is recognized through the contact of the sensing block and a travel switch to realize the stopping movement and further realize the upper limiting function, for example, china patent application CN202022706006.4, the publication date is 2021.09.07, the upper limiting system is disclosed, the heavy hammer uses a proximity switch, the sensing block only needs to be close to the proximity switch on the heavy hammer to stop the operation of the winch system, the sensing block does not contact with butter, and the sensing block and the heavy hammer are prevented from being adhered, so that the sensing block and the heavy hammer are prevented from being adhered to cause out of control and damage to a structural part or a hydraulic system due to butter. However, in the structure, the limit is realized by the contact between the sensing block and the travel switch, and the sensing block is easy to cause the insensitive condition after being used for a long time, so that the upper limit cannot be really protected.

Disclosure of Invention

An object of the utility model is to provide an go up spacing protection device, guarantee limit structure's stability more reliably, structural reliability is good.

The utility model provides an go up spacing protection device for set up between davit and lifting hook, including the weight, travel switch, first rigidity piece and second rigidity piece, travel switch sets up on the davit, the one end of first rigidity piece links to each other with the weight, the other end of first rigidity piece links to each other with travel switch, the one end of second connecting piece links to each other with the davit, the other end of second connecting piece links to each other with the weight, the weight setting is between davit and lifting hook, travel switch does not open and the second connecting piece is in lax state when first rigidity piece is in taut state, travel switch opens when first rigidity piece is in lax state.

Above setting, because through set up first rigidity piece between weight and travel switch, then set up the second rigidity piece between davit and weight, it does not open and the second rigidity piece is in lax state to form the switch when first rigidity piece is in the taut state, so the weight mainly suspends through first rigidity piece, travel switch does not open thereby make the lifting hook continue the rebound, when the lifting hook moves the lower extreme of weight, the lifting hook can contact with the weight thereby make the gravity of weight supported part by the lifting hook, at this moment, the weight can make the upwards slight rebound in the twinkling of an eye so that first rigidity piece is in the slight lax state and trigger travel switch and open, the restriction lifting hook continues the rebound, thereby protect upper limit position through mechanical structure, prevent the condition that can't carry out work when travel switch receives external environment influence, ensure the stability of upper limit device structure, simultaneously through set up the second rigidity piece and stop the rebound in the twinkling of an eye after carrying out upper limit position to the lifting hook, thereby can make the lifting hook suspend through second rigidity piece through the weight in the second rigidity piece in the downward migration in the twinkling of an eye, prevent to damage first rigidity piece, the structure is reliable.

Further, travel switch includes main part, spacing post and swing arm, and the main part is fixed on the davit, and the one end and the main part of swing arm rotate to be connected, and spacing post one end is fixed on the davit, and the other end of swing arm rotates with the other end of first rigidity piece to be connected, and the other end of spacing post and the other end butt of swing arm, travel switch work when the swing arm swings.

Above setting, through setting up swing arm structure and spacing post, spacing post restricts swing arm wobbling furthest for thereby swing arm can swing when first rigid piece is lax and trigger travel switch work, simple structure and reliable.

The travel switch is arranged on the first connecting plate, the guide column assembly is arranged on the first connecting plate and comprises two guide columns which are arranged in parallel and fixed on the first connecting plate and a limiting plate which is arranged at one end of each of the two guide columns, and a gap for the first rigid assembly to pass through is formed between the two guide columns.

Above setting, fixing travel switch through first connecting plate, make things convenient for travel switch's installation, lead through setting up spacing post subassembly to the removal of first rigidity piece for the removal of first rigidity piece is more reliable.

Further, the weight includes annular portion, and the middle part of annular portion is hollow structure, and the one end of annular portion is provided with the opening, and the open-ended both sides are connected with the mounting panel.

Above setting, the weight sets up to the loop configuration, when lightening weight, and the wire rope that conveniently links to each other with the lifting hook passes through in the loop portion, and sets up the opening, conveniently opens the opening and takes out the lifting hook.

Furthermore, the other end of the first rigid part is rotationally connected with the heavy hammer, the other end of the second rigid part is rotationally connected with the heavy hammer, and the first rigid part and the second rigid part are symmetrically arranged around the center of the heavy hammer.

Through the arrangement, the first rigid part and the second rigid part are symmetrically arranged at the center of the heavy hammer, so that the suspension arm can uniformly bear the force on the heavy hammer.

Furthermore, the device also comprises a third rigid part, one end of the third rigid part is rotatably connected with the lower end of the first connecting plate, the other end of the third rigid part is rotatably connected with the heavy hammer, and the third rigid part is in a loose state when the first rigid part is in a straightening state.

Above setting, through addding the third rigid member, prevent because the condition of damaging when the first rigid member suddenly receives too big pulling force in the twinkling of an eye from lax to the state of flare-outing, increase the life-span of first rigid member.

Furthermore, a protection pipe is sleeved outside the first rigid member and arranged between the first rigid member and the third rigid member.

In the above arrangement, the first rigid member is sleeved with the protective tube, so that friction between the first rigid member and the third rigid member is reduced.

Furthermore, the third rigid part and the second rigid part are chains, the heavy hammer is provided with a fixing ring, the other end of the third rigid part is provided with a fixing buckle penetrating through the fixing ring, and the other end of the second rigid part is also provided with a fixing buckle penetrating through the fixing ring.

Above setting, through setting up fixed knot on the solid fixed ring, set up second rigidity piece and third rigidity piece on the weight.

Furthermore, the first rigid part is a steel wire rope, and the other end of the first steel wire rope is arranged on a fixing ring connected with the third rigid part through a rope clamp.

Above setting, realize the fixed of first rigidity piece through the rope clip, simple structure.

Drawings

Fig. 1 is a front view of the present invention.

Fig. 2 is a side view of the present invention.

Fig. 3 is a schematic view of the three-dimensional structure of the present invention.

Fig. 4 is a top view of the present invention.

Fig. 5 is a schematic view of a part of the structure of the present invention used between the boom and the hook.

In the figure: 1. a weight dropper; 2. a travel switch; 3. a first rigid member; 4. a second rigid member; 01. a suspension arm; 02. a hook; 21. a body portion; 22. a limiting column; 23. swinging arms; 201 a first connecting plate; 202. a guide post assembly; 2021. a guide post; 2022. a limiting plate; 11. an annular portion; 12. an opening; 13. protecting the tube; 14. a fixing ring; 15. mounting a plate; 6. a third rigid member; 7. a fixing buckle; 31. and (4) rope clamps.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1-5, the present invention provides an upper limit protection device for being disposed between a suspension arm 01 and a hook 02, including a weight 1, a travel switch 2, a first rigid member 3 and a second rigid member 4, the travel switch 2 is disposed on the suspension arm 01, one end of the first rigid member 3 is connected to the weight 1, the other end of the first rigid member 3 is connected to the travel switch 2, one end of the second connecting member 4 is connected to the suspension arm 01, the other end of the second connecting member 4 is connected to the weight 1, the weight 1 is disposed between the suspension arm 01 and the hook 02, the travel switch 2 is not opened when the first rigid member 3 is in a tension state, the second rigid member 4 is in a loose state, and the travel switch 2 is opened when the first rigid member 3 is in a loose state.

As shown in fig. 1 and 4, the travel switch 2 includes a main body 21, a limit post 22, and a swing arm 23, the main body 21 is fixed to the boom 01, one end of the swing arm 23 is rotatably connected to the main body 21, one end of the limit post 22 is fixed to the boom 01, the other end of the swing arm 23 is rotatably connected to the other end of the first rigid member 3, the other end of the limit post 22 abuts against the other end of the swing arm 23, and the travel switch 2 operates when the swing arm 23 swings. In this embodiment, when the travel switch 2 is not turned on, the swing arm 23 abuts against the limit post 22, when the travel switch 2 is turned on, the swing arm 23 moves in a direction away from the limit post 22, by setting a length difference between the first rigid member 3 and the second rigid member 4 between the suspension arm and the heavy hammer, the travel switch 2 is not turned on and the second rigid member 4 is in a loose state when the first rigid member 3 is in a tensioned state, and the travel switch 2 is turned on when the first rigid member 3 is in a loose state, for example, the length of the first rigid member 3 between the suspension arm and the heavy hammer is smaller than the length of the second rigid member 4.

Through setting up swing arm structure and spacing post, spacing post restricts swing arm wobbling furthest for thereby the swing arm can swing when first rigid member is lax and trigger travel switch work, simple structure and reliable.

As shown in fig. 3, the travel switch 2 is disposed on the boom through a first connecting plate 201, a guide post assembly 202 is further disposed on the first connecting plate 201, the guide post assembly 202 includes two guide posts 2021 disposed in parallel and fixed on the first connecting plate, and a limit plate 2022 disposed at one end of the two guide posts 2021, and a gap through which the first rigid component 3 passes is disposed between the two guide posts 2021. In this embodiment, the first connecting plate 201 is an L-shaped plate, the guide post assembly 202 is disposed at the lower end of the first connecting plate, a fixing hole is disposed at one end of the guide post 2021, and the limiting plate 2022 is fixed on the fixing hole by a screw. Travel switch is fixed through the first connecting plate, makes things convenient for travel switch's installation, leads through setting up the removal of spacing post subassembly to first rigidity piece for the removal of first rigidity piece is more reliable.

As shown in FIG. 3, the weight 1 comprises a ring portion 11, the middle of the ring portion 11 is hollow, an opening 12 is formed at one end of the ring portion 11, and mounting plates 15 are connected to two sides of the opening 12. In this embodiment, the mounting plate 15 is fixed to the opening 12 by screws. The weight 1 is of an annular structure, so that the weight is reduced, meanwhile, a steel wire rope connected with the lifting hook can conveniently pass through the annular part, an opening is formed, and the lifting hook can be conveniently taken out by opening the opening.

As shown in FIGS. 2 and 3, the other end of the first rigid member 3 is rotatably connected to the weight 1, the other end of the second rigid member 4 is rotatably connected to the weight 1, and the first rigid member 3 and the second rigid member 4 are disposed symmetrically about the center of the weight 1. In this embodiment, a protective tube 13 is provided around the first rigid member 3, and the protective tube 13 is provided between the first rigid member 3 and the third rigid member 4. The protection tube 13 is a nylon tube, a through hole (not shown) is formed in the middle of the nylon tube, the first rigid member 3 penetrates through the through hole, in the embodiment, the third rigid member 6 and the second rigid member 4 are chains, and the first rigid member 3 is a steel wire rope. Through the first rigid part and the second rigid part which are symmetrically arranged at the center of the heavy hammer, the force applied to the heavy hammer by the suspension arm is uniform, and the friction between the first rigid part and the third rigid part is reduced by arranging the protection pipe 13 outside the first rigid part 3 in a sleeved mode.

As shown in fig. 1 and 2, a third rigid member 6 is further disposed between the first connecting plate 201 and the weight 1, one end of the third rigid member 6 is rotatably connected to the lower end of the first connecting plate 201, the other end of the third rigid member 6 is rotatably connected to the weight 1, and the third rigid member 6 is in a loose state when the first rigid member 3 is in a straightened state.

In this embodiment, the third rigid element 6 is in a relaxed state when the first rigid element 3 is in the straightened state by setting the length difference between the weight and the first rigid element 3 at the junction of the first connecting plate and the third rigid element 6, for example, the length of the third rigid element 6 between the weight and the junction of the first connecting plate and the third rigid element 6 is longer than the length of the first rigid element 3.

The weight 1 is provided with a fixing ring 14, the other end of the third rigid part 6 is provided with a fixing buckle 7 penetrating through the fixing ring 14, and the other end of the second rigid part 4 is also provided with a fixing buckle 7 penetrating through the fixing ring 14. In this embodiment, the fixing buckle 7 is a U-shaped ring with an opening, a fixing hole is formed in the U-shaped ring at the opening, a fixing pin passes through the fixing hole and the fixing ring 14 and then is fixed by a bolt, the fixing buckle 7 is arranged on the fixing ring 14, and the second rigid member 4 and the third rigid member 6 are arranged on the weight 1. The other end of the first wire rope is arranged on the fixing ring 14 connected with the third rigid member 6 through the rope clamp 31. The first rigid part is fixed through the rope clamp, and the structure is simple. The third rigid part is additionally arranged, so that the first rigid part is prevented from being damaged due to sudden overlarge tension at the moment from relaxation to a straightening state, and the service life of the first rigid part is prolonged.

The utility model discloses the theory of operation: the first rigid part 3 is arranged between the heavy hammer 1 and the travel switch 2, then the second rigid part 4 is arranged between the heavy hammer 01 and the heavy hammer 1, when the first rigid part 3 is in a tensioned state, the switch is not opened, and the second rigid part 4 is in a loose state, so that the heavy hammer 1 is mainly suspended through the first rigid part 3, the travel switch 2 is not opened, so that the hook 02 continues to move upwards, when the hook 02 moves to the lower end of the heavy hammer 1, the hook 02 can be in contact with the heavy hammer 1, so that the gravity of the heavy hammer 1 is supported by the hook 02, at the moment, the heavy hammer 1 can instantly slightly move upwards, so that the first rigid part 3 is in a slightly loose state, the travel switch 2 is triggered to be opened, the hook 02 is limited to continue to move upwards, so that the upper limit position is protected through a mechanical structure, the situation that the travel switch 2 cannot work when being influenced by the external environment is prevented, the stability of the structure of the upper limit device is ensured, meanwhile, after the hook 1 instantly stops moving upwards after the hook is limited upwards, the hook 1 can instantly, the heavy hammer can move downwards, so that the second rigid part 4 instantly moves, the first rigid part 4 can damage to the first rigid part 3 is prevented, and the heavy hammer is reliably suspended.

Claims

1. The utility model provides an go up spacing protection device for the setting is between davit and lifting hook, its characterized in that: the travel switch is arranged on the suspension arm, one end of the first rigid part is connected with the heavy hammer, the other end of the first rigid part is connected with the travel switch, one end of the second rigid part is connected with the suspension arm, the other end of the second rigid part is connected with the heavy hammer, the heavy hammer is arranged between the suspension arm and a lifting hook, the travel switch is not turned on when the first rigid part is in a tensioning state, the second rigid part is in a loose state, and the travel switch is turned on when the first rigid part is in the loose state.

2. An upper limit protection device according to claim 1, wherein: travel switch includes main part, spacing post and swing arm, and the main part is fixed on the davit, and the one end and the main part of swing arm rotate to be connected, and spacing post one end is fixed on the davit, and the other end of swing arm rotates with the other end of first rigid piece to be connected, and the other end of spacing post and the other end butt of swing arm, travel switch work when the swing arm swings.

3. An upper limit protection device according to claim 1, wherein: still include first connecting plate, travel switch sets up on first connecting plate, still is provided with the guide post subassembly on the first connecting plate, and the guide post subassembly includes two parallel arrangement and fixes the guide post on first connecting plate and set up the limiting plate in one of two guide posts, is equipped with the clearance that supplies first rigidity to pass between two guide posts.

4. An upper limit protection device according to claim 1, wherein: the weight comprises an annular part, the middle part of the annular part is of a hollow structure, one end of the annular part is provided with an opening, and two sides of the opening are connected with mounting plates.

5. An upper limit protection device according to claim 1, wherein: the other end of the first rigid part is rotationally connected with the heavy hammer, the other end of the second rigid part is rotationally connected with the heavy hammer, and the first rigid part and the second rigid part are symmetrically arranged around the center of the heavy hammer.

6. An upper limit protection device according to claim 3, wherein: the weight-adjustable hydraulic lifting device is characterized by further comprising a third rigid part, one end of the third rigid part is rotatably connected with the lower end of the first connecting plate, the other end of the third rigid part is rotatably connected with the heavy hammer, and the third rigid part is in a loose state when the first rigid part is in a straightening state.

7. An upper limit protection device according to claim 6, wherein: the first rigid piece is sleeved with a protection pipe, and the protection pipe is arranged between the first rigid piece and the third rigid piece.

8. An upper limit protection device according to claim 6, wherein: the third rigid part and the second rigid part are chains, the heavy hammer is provided with a fixing ring, the other end of the third rigid part is provided with a fixing buckle penetrating through the fixing ring, and the other end of the second rigid part is also provided with a fixing buckle penetrating through the fixing ring.

9. An upper limit protection device according to claim 6, wherein: the first rigid part is a steel wire rope, and the other end of the first steel wire rope is arranged on a fixing ring connected with the third rigid part through a rope clamp.