CN219279336U

CN219279336U - Connecting rod mechanism for controlling pulling pin locking step by step

Info

Publication number: CN219279336U
Application number: CN202222089478.9U
Authority: CN
Inventors: 曹凯; 石兰芳; 李毅
Original assignee: Zhonglian Hengtong Machinery Co Ltd
Current assignee: Zhonglian Hengtong Machinery Co Ltd
Priority date: 2022-08-09
Filing date: 2022-08-09
Publication date: 2023-06-30
Anticipated expiration: 2032-08-09

Abstract

The utility model provides a connecting rod mechanism for controlling pin pulling locking step by step. The connecting rod mechanism comprises a first pin, a second pin, a connecting rod assembly, a driving piece and a mounting seat; the first suspension arm and the second suspension arm are provided with a first hole and a second hole, and the first pin is used for penetrating through the first hole to lock the first suspension arm and the second suspension arm; the second pin is used to pass through the second hole to lock the first and second booms; the mounting seat is internally provided with a splicing hole and a lower hole; the connecting rod assembly is symmetrically arranged along the axial lead of the second suspension arm, the connecting rod assembly is hinged above the mounting seat to form a fixed hinge point A, one end of the connecting rod assembly is connected with the first pin through a driving piece capable of horizontally stretching and retracting, and the other end of the connecting rod assembly is positioned along the lower position hole under the horizontal stretching and retracting action of the driving piece to limit the second pin. The utility model can realize the locking of each other, thereby avoiding the relative expansion of the first suspension arm and the second suspension arm and ensuring the safety of the suspension arms.

Description

Connecting rod mechanism for controlling pulling pin locking step by step

Technical Field

The utility model relates to the technical field of lifting equipment, in particular to a connecting rod mechanism for controlling pin pulling locking step by step.

Background

The lifting device refers to a multi-action lifting device for vertically lifting and horizontally carrying a weight within a certain range, and the lifting device is provided with a turntable and a lifting arm. When the lifting equipment does not perform lifting operation, the hydraulic system is controlled to enable the whole lifting arm to be in a contracted state and extend in the horizontal direction; when the lifting operation of the lifting equipment is needed, the hydraulic system of the lifting equipment is controlled to enable the lifting arm to rotate relative to the turntable until the lifting arm is integrally lifted to an operation position, and the telescopic joint arm can stretch and retract in the lifting process or after the lifting arm is lifted to the operation position.

Road driving safety is an important index for measuring the driving performance of hoisting equipment. Currently, when the hoisting equipment is suddenly stopped in a running state, the phenomenon that the telescopic joint arm moves forwards relative to the basic arm occurs due to the inertia action of the telescopic joint arm and/or the inertia force born by the telescopic joint arm is greater than the resistance born between the telescopic joint arm and the basic arm and between the oil cylinders, so that the phenomenon is commonly called as arm channeling; especially in the case of emergency high-speed emergency braking, the forward extension is increased, so that the auxiliary hook rope wedge can impact the top arm point pulley, and the arm point pulley is damaged. If the customer misoperates and does not add the hook head at the front end, the large arm can be caused to blow out to top the front vehicle or the obstacle in severe cases, and safety accidents are generated. The main reason for the phenomenon is that the telescopic joint arm is connected with the basic arm through the oil cylinder independently, and when the hoisting equipment suddenly stops, the telescopic joint arm drives the cylinder barrel of the oil cylinder to move forwards due to the inertia effect because the pressure oil in the rod cavity of the oil cylinder can not be locked, so that the telescopic joint arm stretches outwards.

Disclosure of Invention

The utility model aims to provide a connecting rod mechanism capable of controlling pin pulling locking step by step, which can prevent an expansion joint arm from rushing out to top a vehicle or an obstacle in front of the top to generate a safety accident.

The technical scheme of the utility model is as follows: the connecting rod mechanism for controlling the pin pulling locking step by step comprises a first pin, a second pin, a connecting rod assembly, a driving piece and a mounting seat;

a first hole and a second hole are formed in two opposite sides of the first suspension arm and the second suspension arm, and the first pin is used for penetrating through the first hole to lock the first suspension arm and the second suspension arm; the second pin is used to pass through the second hole to lock the first and second booms;

the mounting seat is internally and horizontally provided with a plug hole corresponding to the second hole, and the mounting seat is also provided with a lower hole vertically penetrating through the plug hole;

the connecting rod assembly is symmetrically arranged along the axial lead of the second suspension arm, the connecting rod assembly is hinged above the mounting seat to form a fixed hinge point A, one end of the connecting rod assembly is connected with the first pin through a driving piece capable of horizontally stretching and retracting, and the other end of the connecting rod assembly is positioned along the lower position hole under the horizontal stretching and retracting action of the driving piece to limit the second pin.

Preferably, the link assembly includes a first link, a second link, and a third link; the upper end of the mounting seat is provided with a fixing seat; one end of the first connecting rod is hinged with the driving piece, the other end of the first connecting rod is hinged with the second connecting rod, and the hinge point A is positioned on the fixed seat; the second connecting rod is hinged with the third connecting rod, and the third connecting rod is matched with the lower hole.

Preferably, the length of the first link is greater than the length of the second link.

Preferably, the first connecting rod and the second connecting rod are both plate-shaped structures, and the third connecting rod is shaft-shaped.

Preferably, two fixing seats are symmetrically arranged on the mounting seat, and the two fixing seats are respectively hinged with the corresponding connecting rod assemblies.

Preferably, the driving piece is a double-head oil cylinder, and piston rods at two ends of the oil cylinder are respectively connected with the first pin and the connecting rod assembly.

Preferably, the driving member is fixedly arranged in the second suspension arm.

Compared with the related art, the utility model has the beneficial effects that: the first pin and the second pin in the connecting rod mechanism for controlling the pulling pin locking step by step can be mutually locked, so that the first suspension arm and the second suspension arm are prevented from relatively telescoping, and the safety of the suspension arms is ensured.

Drawings

FIG. 1 is a schematic diagram of a linkage mechanism for controlling pin pulling locking step by step;

FIG. 2 is a schematic diagram of a first pin in a linkage mechanism for controlling pin pulling locking step by step;

fig. 3 is a schematic structural diagram of the linkage mechanism for controlling the locking of the pulling pin step by step in the present utility model when the second pin is locked.

In the accompanying drawings: 1. a first boom; 11. a first hole; 2. a second boom; 21. a second hole; 3. a first pin; 4. a second pin; 5. a connecting rod assembly; 51. a first link; 52. a second link; 53. a third link; 6. a driving member; 7. a mounting base; 71. a plug hole; 72. a lower hole; 8. a fixing seat.

Detailed Description

The utility model will be described in detail below with reference to the drawings in connection with embodiments. It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. For convenience of description, the words "upper", "lower", "left" and "right" are used hereinafter to denote only the directions corresponding to the upper, lower, left, and right directions of the drawings, and do not limit the structure.

As shown in fig. 1, the link mechanism for controlling the pin pulling locking step by step provided in this embodiment can avoid the expansion joint arm from jumping out to the front vehicle or the obstacle, and thus a safety accident is generated. It is applied to a boom comprising a first boom 1 and a second boom 2 nested within the first boom 1.

The connecting rod mechanism for controlling the pin pulling locking step by step comprises a first pin 3, a second pin 4, a connecting rod assembly 5, a driving piece 6, a mounting seat 7 and a fixing seat 8.

The opposite sides of the first suspension arm 1 and the second suspension arm 2 are respectively provided with a first hole 11 matched with the first pin 3 and a second hole 21 matched with the second pin 4.

The mounting seat 7 is disposed in the second boom 2, the mounting seat 7 is provided with a plugging hole 71 corresponding to the second hole 21, and the mounting seat 7 is further provided with a lower hole 72 vertically penetrating through the plugging hole 71. The upper side of mount pad 7 is equipped with fixing base 8, fixing base 8 is in the symmetry is equipped with two on the mount pad 7. The shape of the fixed seat 8 can be a triangle with a small upper part and a big lower part, the bottom edge of the big lower part is connected with the mounting seat 7, and the small upper part is used for hinging the connecting rod assembly 5 to form a fixed hinging point A.

The two connecting rod assemblies 5 are symmetrically arranged along the axial lead H of the second suspension arm 2. In a specific embodiment, the linkage assembly 5 includes a first linkage 51, a second linkage 52, and a third linkage 53. One end of the first link 51 is hinged to the first pin 3 through a horizontally telescopic driving member 6, and the other end is hinged to the second link 52. The first connecting rod 51 is hinged to the fixing seat 8 to form the hinge point a, so as to support the rotation of the first connecting rod 51. The second link 52 is hinged to the third link 53, and the third link 53 is displaced along the lower hole 72 under the horizontal telescopic action of the driving member 6 to limit the second pin 4. The length of the first link 51 is greater than the length of the second link 52 for better force transfer. The first link 51 and the second link 52 are both plate-like structures, and the third link 53 is shaft-like.

The driving piece 6 is a double-head oil cylinder, a piston rod at one end of the oil cylinder is fixedly connected with the first pin 3, a piston rod at the other end of the oil cylinder is hinged with a first connecting rod 51 of the connecting rod assembly 5, and a cylinder barrel of the oil cylinder is fixedly arranged in the second suspension arm 2.

When the second pin 4 is disengaged from the first boom 1, as shown in fig. 2, the drive member 6 is activated, displacing both said piston rods simultaneously outwards, causing the first pin 3 to lock the first boom 1 and the second boom 2 through said first hole 11. At this time, the displacement of the piston rod can pull the first link 51 to rotate along the hinge point a, and the third link 53 is moved up in the lower hole 72, so that the second pin 4 can be inserted into the insertion hole 71. The third link 53 is restrained from moving downwards under the restraining action of the second pin 4, whereby locking of the first pin 3 by the second pin 4 is achieved, avoiding that the first pin 3 is disengaged from the first boom 1, which forms a double definition of the first pin 3 with the drive 6.

As shown in fig. 3, the second pin 4 passes through the second holes 21 on the first boom 1 and the second boom 2 simultaneously to lock the first boom 1 and the second boom 2. The driving piece 6 is started to enable the two piston rods to simultaneously displace inwards, the first connecting rod 51 is driven to rotate along the hinge point A, the third connecting rod 53 moves downwards in the lower hole 72, the plug hole 71 is plugged, and the second pin 4 is prevented from being separated from the first suspension arm 1. At this time, the first pin 5 is disengaged from the first boom 1.

The second pin 4 is driven by a hydraulic system to be inserted and pulled out, which is another existing system and is not an improvement point of the present utility model, and will not be described herein.

The foregoing description is only illustrative of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structures or equivalent processes or direct or indirect application in other related technical fields are included in the scope of the present utility model.

Claims

1. The connecting rod mechanism is used for controlling the pulling pin locking step by step and is applied to a crane arm, and the crane arm comprises a first suspension arm and a second suspension arm nested in the first suspension arm, and is characterized by comprising a first pin, a second pin, a connecting rod assembly, a driving piece and a mounting seat;

the connecting rod assemblies are symmetrically arranged along the axial lead of the second suspension arm, the connecting rod assemblies are hinged above the mounting seat to form fixed hinge points A, two driving parts are arranged, one end of each connecting rod assembly is connected with the first pin through a driving part capable of horizontally stretching and retracting, and the other end of each connecting rod assembly is connected with the second pin under the horizontal stretching and retracting action of the driving part along the lower hole position.

2. The step-controlled pin lock linkage of claim 1, wherein the linkage assembly comprises a first link, a second link, and a third link; the upper end of the mounting seat is provided with a fixing seat; one end of the first connecting rod is hinged with the driving piece, the other end of the first connecting rod is hinged with the second connecting rod, and the hinge point A is positioned on the fixed seat; the second connecting rod is hinged with the third connecting rod, and the third connecting rod is matched with the lower hole.

3. The step-control pin lock linkage of claim 2, wherein the first link has a length that is greater than a length of the second link.

4. The linkage mechanism for controlling pin pulling locking step by step according to claim 2, wherein the first and second links are each of a plate-like structure, and the third link is of a shaft-like structure.

5. The connecting rod mechanism for controlling pin pulling locking step by step according to claim 2, wherein two fixing seats are symmetrically arranged on the mounting seat, and the two fixing seats are respectively hinged with the corresponding connecting rod assemblies.

6. The linkage mechanism for controlling pin pulling and locking stepwise according to claim 1, wherein the driving member is a double-headed cylinder, and piston rods at both ends of the cylinder are connected to the first pin and the linkage assembly, respectively.

7. The stepwise controlled latch lock linkage of claim 1, wherein the drive member is secured within the second boom arm.