CN215402580U

CN215402580U - Automatic unhooking hanger

Info

Publication number: CN215402580U
Application number: CN202120622784.7U
Authority: CN
Inventors: 杨超; 何杰; 延冠杰; 闫硕; 李娜; 韩肖; 刘松; 刘超
Original assignee: Juli Sling Co Ltd
Current assignee: Juli Sling Co Ltd
Priority date: 2021-03-26
Filing date: 2021-03-26
Publication date: 2022-01-04
Anticipated expiration: 2031-03-26

Abstract

The utility model discloses an automatic unhooking hanger, which comprises a support frame, a hanging shaft assembly, a left clamping arm and a right clamping arm, wherein the hanging shaft assembly is used for being connected with a crane, the left clamping arm and the right clamping arm are respectively hinged on a left hinge shaft and a right hinge shaft at the lower end of the support frame, the upper ends of the left clamping arm and the right clamping arm above the left hinge shaft and the right hinge shaft are respectively hinged with a central shaft through a left connecting rod mechanism and a right connecting rod mechanism, a central shaft is arranged in a chute of the support frame in a vertically movable mode, the self weights of the left clamping arm and the right clamping arm can respectively drive the lower ends of the left clamping arm and the right clamping arm to rotate inwards to be closed, the central shaft moves upwards along the chute when the lower ends of the left clamping arm and the right clamping arm rotate inwards, a central shaft driving device capable of pushing the central shaft to move downwards is arranged on the support frame, and when the central shaft moves downwards, the lower ends of the left clamping arm and the right clamping arm rotate outwards to open a closed jaw. The automatic unhooking lifting appliance is simple and reliable in structure and high in throwing accuracy, can realize automatic unhooking, and can meet the requirement of large-tonnage heavy object lifting.

Description

Automatic unhooking hanger

Technical Field

The utility model relates to the field of cranes, in particular to a lifting appliance for a crane.

Background

When releasing hoisted heavy objects, the existing crane usually adopts the following two modes: the first method is to adopt a steel wire rope to pull and release, the method cannot release the hoisted heavy object at any position and at any time, and the release point has larger error, cannot realize fixed-point accurate throwing, and has certain potential safety hazard; the second is that the cylinder motion is adopted to drive unhooking release, and this kind of mode is comparatively safe and reliable, but because push rod or cylinder can't satisfy the unhooking release of super large-tonnage, consequently can cause the unhooking difficult and with high costs scheduling problem. In summary, the existing hoisted heavy objects have the problems of high cost, difficult unhooking, low throwing accuracy, safe operation and the like.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem of providing an automatic unhooking hanger which has simple and reliable structure and high throwing accuracy, can realize automatic unhooking and can meet the requirement of hoisting large-tonnage heavy objects.

The utility model relates to an automatic unhooking hanger, which comprises a support frame, a hanging shaft assembly and two left and right clamping arms, wherein the hanging shaft assembly is connected with the upper end of the support frame, the left and right clamping arms are respectively hinged on a left hinge shaft and a right hinge shaft which are arranged at the lower end of the support frame in a bilateral symmetry manner, the upper ends of the left and right clamping arms above the left and right hinge shafts are respectively hinged with a central shaft through a left connecting rod mechanism and a right connecting rod mechanism, the central shaft is arranged in a chute of the support frame in a vertically movable manner, the self weights of the left and right clamping arms can respectively drive the lower ends of the left and right clamping arms to rotate inwards to be closed to form a jaw for hoisting heavy objects, the lower ends of the left and right clamping arms drive the left and right connecting rod mechanisms to drive the central shaft to move upwards along the chute when rotating inwards, a central shaft driving device capable of pushing the central shaft to move downwards along the chute is arranged on the support frame, when the central shaft moves downwards, the lower ends of the left and right clamping arms can be driven by the left and right connecting rod mechanisms to rotate outwards to open the closed jaw, and the support frame is further provided with a central shaft fixing device which is used for fixing the central shaft which moves upwards to the upper limit position of the central shaft.

The utility model discloses an automatic unhooking lifting appliance, wherein a central shaft fixing device comprises a first hydraulic cylinder and a rotating body which are arranged on a supporting frame, the rotating body is integrally formed by a driving arm and a lifting hook, the intersection part of the driving arm and the lifting hook is hinged on the supporting frame, the end part of the driving arm is hinged on the end part of a telescopic rod of the first hydraulic cylinder, and the lifting hook can hook the central shaft which moves upwards to the upper limit position of the lifting hook under the driving of the first hydraulic cylinder.

The utility model discloses an automatic unhooking hanger, wherein a central shaft driving device comprises a second hydraulic cylinder and a driving piece, wherein the second hydraulic cylinder is installed on a supporting frame, the driving piece can be matched with the central shaft, and the upper end of the driving piece is installed at the end part of a telescopic rod of the second hydraulic cylinder.

The left connecting rod mechanism and the right connecting rod mechanism are completely the same in structure and respectively comprise a front connecting rod and a rear connecting rod which are symmetrically distributed in the front and the rear directions, the supporting frame, the left clamping arm and the right clamping arm are positioned between the front connecting rod and the rear connecting rod, one ends of the front connecting rod and the rear connecting rod are respectively hinged at the upper ends of the left clamping arm and the right clamping arm, and the other ends of the front connecting rod and the rear connecting rod are respectively hinged on the central shaft.

The utility model relates to an automatic unhooking hanger, wherein a support frame comprises a front plate and a rear plate which are symmetrically distributed in the front and the rear directions, a first hydraulic cylinder and a second hydraulic cylinder are both positioned between the front plate and the rear plate, a left hinge shaft and a right hinge shaft are connected between the front plate and the rear plate, and front and rear corresponding vertical long holes which are respectively arranged on the front plate and the rear plate form sliding grooves.

The automatic unhooking hanger is simple in structure, safe and reliable, and safe hoisting, automatic unhooking and accurate throwing of large-tonnage heavy objects are achieved through the left and right four-bar mechanisms, the central shaft fixing device and the central shaft driving device.

The automatic unhooking sling according to the utility model will be further described with reference to the accompanying drawings.

Drawings

Fig. 1 is a schematic perspective view of an automatic unhooking spreader according to the present invention with jaws open;

fig. 2 is a schematic front view of an open jaw state of the automatic unhooking spreader of the present invention;

fig. 3 is a perspective view of the jaw closed state of the automatic unhooking spreader of the present invention;

fig. 4 is a front view schematically showing the closed state of the jaws of the automatic unhooking spreader of the present invention.

Detailed Description

As shown in fig. 1 and 2, the automatic unhooking sling of the utility model comprises a support frame 1, a hanging shaft assembly 2 and two left and right clamping arms 3 and 3' with identical structures. The hanging shaft assembly 2 is connected to the upper end of the support frame 1 for connection with a crane. The support frame 1 comprises two front and rear plates 11, 11 ' which are symmetrically distributed front and rear, the front and rear plates 11, 11 ' are welded together through a connecting plate, and the front and rear vertical long holes which correspond to each other in front and rear and are respectively arranged on the front and rear plates 11, 11 ' form a sliding groove 12. The left and right clamping arms 3, 3 'are respectively hinged on left and right hinge shafts 11, 11' at the lower end of the supporting frame 1 in a bilateral symmetry way, and the left and right hinge shafts 11, 11 'are connected between the front and rear plates 11, 11' in a bilateral symmetry way. The upper ends of the left and right clamping arms 3 and 3 'above the left and right hinge shafts 11 and 11' are respectively hinged with a central shaft 5 through left and right symmetrical left and right link mechanisms 4 and 4 ', the central shaft 5 can be installed in a chute 12 of the supporting frame 1 in a way of moving up and down, and the front and rear ends of the central shaft respectively extend out of the front and rear plates 11 and 11'. The left and right link mechanisms 4, 4 'have the same structure and respectively comprise a front connecting rod 41 and a rear connecting rod 42 which are symmetrically distributed in the front and the rear, the supporting frame 1 and the left and the right clamping arms 3, 3' are respectively positioned between the front and the rear connecting

rods

41, 42, one ends of the front and the rear connecting

rods

41, 42 are respectively hinged on a fixed shaft at the upper ends of the left and the right clamping arms 3, 3 ', and the other ends of the front and the rear connecting

rods

41, 42 are respectively hinged on the front and the rear ends of the central shaft 5 which extends out of the front and the rear plates 11, 11'. The dead weights of the left and right clamping arms 3 and 3 'can respectively drive the lower ends of the left and right clamping arms 3 and 3' to rotate inwards to be closed, so that a jaw for hoisting heavy objects is formed. When the lower ends of the left and right clamping arms 3, 3 'rotate inward, the front and rear connecting

rods

41, 42 of the left and right link mechanisms 4, 4' can be driven to drive the central shaft 5 to move upward along the chute 12, and when the jaws are closed, the central shaft 5 moves upward to the upper limit position. The supporting frame 1 is provided with a central shaft driving device 6 capable of pushing the central shaft 5 to move downwards along the sliding chute 12, and the central shaft driving device 6 comprises a second hydraulic cylinder 61 and a driving piece 62 capable of being matched with the central shaft 5. The second hydraulic cylinder 61 is installed on the supporting frame 1 and located between the front and rear plates 11, 11', the upper end of the driving member 62 is installed at the end of the telescopic rod of the second hydraulic cylinder 61, and when the compression rod extends downward, the driving member 62 installed at the end of the telescopic rod pushes the central shaft 5 to move downward. When the central shaft 5 moves downwards, the front and rear connecting

rods

41, 42 of the left and right link mechanisms 4, 4 'can be driven to respectively drive the lower ends of the left and right clamping arms 3, 3' to rotate outwards to open the closed jaws. The support frame 1 is also provided with a central shaft fixing device which is used for fixing a central shaft 5 which moves upwards to the upper limit position of the support frame. The central shaft fixing device comprises a first hydraulic cylinder 71 and a rotating body 72, the first hydraulic cylinder 71 is installed on the support frame 1 and is positioned between the front plate 11 and the rear plate 11, 11', the rotating body 72 is integrally formed by a driving arm 721 and a lifting hook 722, the intersection part of the driving arm 721 and the lifting hook 722 is hinged on the support frame 1, the end part of the driving arm 721 is hinged on the end part of an expansion rod of the first hydraulic cylinder 71, when the expansion rod of the first hydraulic cylinder 71 is retracted, the lifting hook 722 of the rotating body 72 can be driven to rotate and can hook the central shaft 5 which ascends to the upper limit position of the rotation rod, and when the expansion rod extends, the lifting hook 722 reversely rotates to release the central shaft 5. The central shaft fixing device is used for offsetting the downward pulling force of a heavy object on the central shaft 5 in the hoisting process, and effectively preventing the jaw opening caused by the fact that the central shaft 5 descends when being subjected to the downward pulling force. In the embodiment, the diameter of the first hydraulic cylinder 71 is 63mm, and the minimum thrust is 11000N; the cylinder diameter of the second hydraulic cylinder 61 is 80mm, and the minimum thrust 17000N is met; the automatic unhooking hanger effectively reduces the downward acting force on the central shaft 5 through the left and right four-bar linkage mechanisms, has the maximum load of 120t, and can meet the requirement of hoisting heavy objects with large tonnage.

When the automatic unhooking hanger is used for hoisting a heavy object on site, the hanger shaft assembly 2 is connected with a crane hook, and jaws at the lower ends of the left and right clamping arms 3 and 3' of the automatic unhooking hanger are in a closed state under the action of self weight in an initial state. Then the automatic unhooking hanger is transported to the position of the lifted object by the crane, the telescopic rod of the first hydraulic cylinder 71 is controlled by the remote control device to extend out, the lifting hook 722 is driven to rotate to release the fixed central shaft 5, then the telescopic rod of the second hydraulic cylinder 61 is controlled to extend out downwards, the driving piece 62 pushes the central shaft 5 to move downwards, and the left and right clamping arms 3 and 3' open the jaws at the lower ends of the clamping arms, as shown in fig. 3 and 4, the state diagram is shown when the jaws are opened. The lifting belt of the lifted heavy object is placed into the jaw, then the telescopic rod of the second hydraulic cylinder 61 is remotely controlled to be retracted, the jaw is closed by the left and right clamping arms 3 and 3 'under the action of self weight, meanwhile, the central shaft 5 moves upwards to the upper limit position under the driving of the left and right link mechanisms 4 and 4', through signal feedback, the telescopic rod of the first hydraulic cylinder 71 is automatically retracted, and the lifting hook 722 hooks the central shaft 5 again (see fig. 1 and 2). Then the crane lifts the heavy object and moves the heavy object to the destination and places the heavy object at the accurate throwing point, then the first hydraulic cylinder 71 is remotely controlled to extend out of the telescopic rod to release the central shaft 5 fixed by the hook 722, the telescopic rod of the second hydraulic cylinder 61 is remotely controlled to extend downwards, and the left clamping arm 3 and the right clamping arm 3' are driven to open the lower jaw, so that the heavy object is released. When the jaw is opened, the second hydraulic cylinder 61 only needs to overcome the self-weight of the left and right clamping arms 3 and 3' to open the jaw after the weight is placed. Meanwhile, the automatic unhooking hanger can accurately throw large-tonnage heavy objects in the air, when the lifted heavy objects reach a throwing point, only the first hydraulic cylinder 71 needs to be remotely controlled to extend out of the telescopic rod to release the central shaft 5 fixed by the lifting hook 722, and the central shaft 5 moves downwards under the action of the pulling force of the heavy objects in the air, so that the jaws at the lower ends of the left clamping arm 3 and the right clamping arm 3' are opened, and the heavy objects in the air are accurately thrown. The automatic unhooking lifting appliance solves the problem that large-tonnage heavy objects cannot be thrown in the air in the prior art.

The automatic unhooking hanger realizes safe hoisting, automatic unhooking and accurate throwing of large-tonnage heavy objects through the left and right four-bar mechanisms, the central shaft fixing device and the central shaft driving device. The automatic unhooking lifting appliance is simple and reliable in structure and high in throwing accuracy, can realize automatic unhooking, and can meet the requirement of large-tonnage heavy object lifting.

The above examples are only for describing the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art should be made within the protection scope defined by the claims of the present invention without departing from the spirit of the present invention.

Claims

1. The utility model provides an automatic unhook hoist which characterized in that: comprises a support frame (1), a hanging shaft component (2) used for being connected with a crane and a left clamping arm and a right clamping arm (3 and 3 ') with the same structure, wherein the hanging shaft component (2) is connected with the upper end of the support frame (1), the left clamping arm and the right clamping arm (3 and 3') are respectively hinged on a left hinge shaft (11) and a right hinge shaft (11 and 11 ') at the lower end of the support frame (1) in a bilateral symmetry way, the upper ends of the left clamping arm and the right clamping arm (3 and 3') above the left hinge shaft and the right hinge shaft (11 and 11 ') are respectively hinged with a central shaft (5) through a left connecting rod mechanism and a right connecting rod mechanism (4 and 4'), the central shaft (5) can be arranged in a chute (12) of the support frame (1) in an up-down moving way, the self weights of the left clamping arm and the right clamping arm (3 and 3 ') can respectively drive the lower ends of the left clamping arm and the right clamping arm (3 and 3') to rotate inwards to be closed to form a jaw used for hoisting heavy objects, the lower extreme of left and right arm lock (3, 3 ') drives left and right link mechanism (4, 4') drive during the internal rotation the center pin (5) goes upward along spout (12), be equipped with on support frame (1) and promote center pin drive arrangement (6) that center pin (5) moved down along spout (12), when center pin (5) move down, accessible left and right link mechanism (4, 4 ') drive the lower extreme of left and right arm lock (3, 3') respectively and rotate outwards to open closed keeping silent, still be equipped with center pin fixing device on support frame (1), center pin fixing device is used for fixed center pin (5) to go upward to its upper limit position.

2. The automatic unhooking spreader according to claim 1, wherein: the central shaft fixing device comprises a first hydraulic cylinder (71) and a rotating body (72) which are installed on a supporting frame (1), wherein the rotating body (72) is integrally formed by a driving arm (721) and a lifting hook (722), the intersection part of the driving arm (721) and the lifting hook (722) is hinged on the supporting frame (1), the end part of the driving arm (721) is hinged on the end part of an expansion rod of the first hydraulic cylinder (71), and the lifting hook (722) can hook the central shaft (5) which moves upwards to the upper limit position of the central shaft under the driving of the first hydraulic cylinder (71).

3. The automatic unhooking spreader according to claim 1 or 2, wherein: the central shaft driving device (6) comprises a second hydraulic cylinder (61) arranged on the support frame (1) and a driving piece (62) matched with the central shaft (5), and the upper end of the driving piece (62) is arranged at the end part of an expansion rod of the second hydraulic cylinder (61).

4. The automatic unhooking spreader according to claim 3, wherein: the left and right connecting rod mechanisms (4, 4 ') are completely identical in structure and respectively comprise a front connecting rod (41) and a rear connecting rod (42) which are symmetrically distributed in the front and the rear directions, the support frame (1) and the left and right clamping arms (3, 3 ') are respectively positioned between the front and the rear connecting rods (41, 42), one ends of the front and the rear connecting rods (41, 42) are respectively hinged to the upper ends of the left and the right clamping arms (3, 3 '), and the other ends of the front and the rear connecting rods (41, 42) are respectively hinged to the central shaft (5).

5. The automatic unhooking spreader according to claim 4, wherein: the support frame (1) comprises two front plates (11) and two rear plates (11, 11 ') which are symmetrically distributed front and back, a first hydraulic cylinder (71) and a second hydraulic cylinder (61) are both positioned between the front plates (11) and the rear plates (11, 11'), a left hinge shaft (11 ') and a right hinge shaft (11, 11') are connected between the front plates (11) and the rear plates (11, 11 '), and front and back corresponding vertical long holes formed in the front plates (11) and the rear plates (11, 11') form sliding grooves (12).