CN215857960U

CN215857960U - Folding type working arm mechanical height limiting device

Info

Publication number: CN215857960U
Application number: CN202120655948.6U
Authority: CN
Inventors: 夏兆沂; 邵珠娜; 王祥冰; 王学谦; 夏凯欣
Original assignee: Shandong Lingong Construction Machinery Co Ltd
Current assignee: Shandong Lingong Construction Machinery Co Ltd
Priority date: 2021-03-31
Filing date: 2021-03-31
Publication date: 2022-02-18
Anticipated expiration: 2031-03-31

Abstract

The utility model discloses a height limiting device for a folding type working arm machine, which belongs to the field of engineering machinery and solves the problem that the height limiting device for the folding type working arm machine, which can prevent a rotary arm from being blocked in the descending process and can prevent a connecting rod from continuously rotating anticlockwise under the action of inertia when the rotary arm is lifted to a limited height, is detachable, convenient and flexible to install, simple and reliable in structure, low in cost and good in economical efficiency, is absent in the prior art. The device mainly comprises an upper frame and a rotary arm, wherein the rotary arm is hinged with the upper frame, a fixing device is arranged on the upper frame, and the fixing device is connected with a connecting rod; the connecting rod is connected with the left rocker arm and the right rocker arm; the left rocker arm and the right rocker arm are connected with the swing arm. The utility model is mainly used for mechanical height limitation of the working arm.

Description

Folding type working arm mechanical height limiting device

Technical Field

The utility model relates to engineering machinery, in particular to a folding type working arm mechanical height limiting device.

Background

Under some working conditions, such as under bridges, mines, power grids and buildings, the lifting height of the working arm of the excavating or hoisting equipment of the multi-section working arm needs to be limited due to space limitation and safety requirements, and particularly under the working conditions of power grids and lines with mandatory requirements, the excavating or hoisting equipment of the multi-section working arm is forbidden to enter into construction under the condition that no working arm height limiting device is arranged. At present, the height limiting device mainly comprises an electronic height limiting device, but the electronic height limiting device has high cost and poor feasibility and reliability.

At present, a folding type mechanical height limiting device for a working arm, which can prevent the clamping of the rotary arm in the descending process and can prevent the continuous anticlockwise rotation of a connecting rod under the action of inertia when the rotary arm is lifted to a limited height, is simple and reliable in structure, low in cost and good in economical efficiency, and has detachability, and is flexible to mount.

Disclosure of Invention

The utility model aims to provide a folding type mechanical height limiting device for a working arm, and aims to solve the problem that the prior art lacks a folding type mechanical height limiting device for the working arm, which can prevent the rotary arm from being locked in the descending process and can prevent a connecting rod from continuously rotating anticlockwise under the action of inertia when the rotary arm is lifted to a limited height, has detachability, is convenient and flexible to mount, and has a simple and reliable structure, low cost and good economical efficiency.

The utility model is realized by the following technical scheme:

a folding type working arm mechanical height limiting device comprises an upper frame and a rotary arm, wherein the rotary arm is hinged with the upper frame, a fixing device is arranged on the upper frame, and the fixing device is connected with a connecting rod; the connecting rod is connected with the left rocker arm and the right rocker arm; the left rocker arm and the right rocker arm are connected with the swing arm.

Furthermore, the fixing device comprises a base, a fixing block is arranged on the base, pin shafts are arranged on the base and the fixing block, and the base and the fixing block are connected with a connecting rod through the pin shafts; the base and the fixing block are fixed through fastening bolts.

Furthermore, the outer sides of the pin shafts arranged on the base and the fixing block are respectively provided with a baffle plate, and the baffle plates are welded on the fixing block.

Furthermore, a limiting plate is arranged at the front end of the hinged position of the base, the fixing block and the connecting rod.

Furthermore, the connecting rod is hinged with the left rocker arm and the right rocker arm, and the left rocker arm and the right rocker arm are hinged with the swing arm.

Furthermore, the upper hinge guide hole at the hinge joint of the connecting rod and the left rocker arm and the right rocker arm is a long hole or a special-shaped hole.

Compared with the prior art, the utility model has the beneficial effects that:

1. the folding function is realized through the two-link mechanism formed by the rocker arm and the connecting rod, the height limitation in a certain height range can be well realized, and the working efficiency and the quality are improved.

2. Through the articulated guiding hole on the connecting rod, when the spiral arm descends, the spiral arm moves along the long hole or the special-shaped hole of the guiding hole of the connecting rod under the action of the thrust of the spiral arm and the self gravity of the rocker arm, so that the included angle of a two-force rod formed by the connecting rod and the rocker arm on a straight line is not less than 180 degrees, the connecting rod is further pushed, and the problem that the spiral arm is blocked in the descending process is solved.

3. The two link mechanisms and the fixing device have detachability and simple and flexible installation.

4. A limiting plate is welded on the outer side of the base, so that the connecting rod is guaranteed to move within a limited range, and the connecting rod is prevented from continuing to rotate anticlockwise under the action of inertia when the rotating arm is lifted to a limited height.

5. High reliability and low cost.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a partial exploded view of the present invention;

FIG. 3 is a schematic illustration of the minimum travel of the left and right rocker arms and links of the present invention;

FIG. 4 is a schematic illustration of the maximum travel of the left and right rocker arms and links of the present invention;

fig. 5 is a view of the upper hinge hole of the connecting rod of the present invention.

In the figure: 1. a swing arm cylinder; 2. a swing arm; 3. a right rocker arm; 4. a left rocker arm; 5. a connecting rod; 6. a fixed block; 7. a baffle plate; 8. a limiting plate; 9. a base; 10. putting on a shelf; 11. and fastening the bolt.

Detailed Description

The utility model is further described below with reference to the accompanying drawings.

Embodiment 1, a folding type working arm mechanical height limiting device, including an upper frame 10 and a swing arm 2, the swing arm 2 is hinged with the upper frame 10, the upper frame 10 is provided with a fixing device, the fixing device is connected with a connecting rod 5; the connecting rod 5 is connected with the left rocker arm 4 and the right rocker arm 3; the left rocker arm 4 and the right rocker arm 3 are connected with the swing arm 2; the fixing device comprises a base 9, a fixing block 6 is arranged on the base 9, pin shafts are arranged on the base 9 and the fixing block 6, and the base 9 and the fixing block 6 are connected with a connecting rod 5 through the pin shafts; the base 9 and the fixed block 6 are fixed through a fastening bolt 11; the outer sides of the pin shafts arranged on the base 9 and the fixed block 6 are respectively provided with a baffle 7, and the baffle 7 is welded on the fixed block 6; a limiting plate 8 is arranged at the front end of the hinged part of the base 9, the fixed block 6 and the connecting rod 5; the connecting rod 5 is hinged with the left rocker arm 4 and the right rocker arm 3, and the left rocker arm 4 and the right rocker arm 3 are hinged with the swing arm 2; the upper hinge guide hole at the hinge joint of the connecting rod 5 and the left rocker arm 4 and the right rocker arm 3 is a long-strip hole or a special-shaped hole.

One end of the spiral arm oil cylinder 1 is hinged with the spiral arm 2, the other end of the spiral arm oil cylinder is hinged with the upper frame 10, and the spiral arm oil cylinder 1 pushes the spiral arm 2 to rotate, as shown in figure 1. Two link mechanism are constituteed with left rocking arm 4, right rocking arm 3 to connecting rod 5, and two link mechanism upper ends (left rocking arm 4, right rocking arm 3) are connected with spiral arm 2, and lower extreme (connecting rod 5) are connected with fixing device through the round pin axle, and base 9 welds in upper bracket 10, and fixed block 6 will be connected two link mechanism's round pin axle through fastening bolt 11 and fix on base 9, see figure 2. The swing arm oil cylinder 1 extends out, the swing arm 2 is lifted and rotates clockwise around the hinged position with the upper frame, the swing arm 2 drives the left rocker arm 4 and the right rocker arm 3 to move simultaneously when lifted, and at the moment, the left rocker arm 4 and the right rocker arm 3 rotate around the hinged holes at the lower ends of the left rocker arm and the right rocker arm 3, and the state shown in figure 3 is realized. The swing arm 2 continues to be lifted, the circle centers of the hinge holes at the lower ends of the left rocker arm 4 and the right rocker arm 3 move along the hinge guide holes of the connecting rod 5 and finally move to the state shown in fig. 4, namely the swing arm 2 reaches the limited lifting height, and the limiting plate 8 prevents the connecting rod 5 from continuing to move towards the counterclockwise direction under the action of inertia in the process. The process of retrieving the swing arm 2 refers to the process of lifting the swing arm 2.

When the swing arm 2 is lifted to a limited height (state shown in fig. 4), the circle center connecting line of the hinged guide holes (long holes or special-shaped holes) of the connecting rod 5 (shown in fig. 5) forms an acute angle with the connecting line of the circle centers of the hinged holes at the upper ends of the left rocker arm 4 and the right rocker arm 3 and the circle center of the hinged hole at the lower end of the connecting rod 5, so that the clamping phenomenon possibly occurring in the descending process of the swing arm 2 is overcome.

And the baffle 7 prevents the pin shaft at the joint of the lower end of the connecting rod 5 and the fixing device from moving transversely when the swing arm 2 moves.

And a limit plate 8 for preventing the connecting rod 5 from continuing to rotate counterclockwise (state of fig. 4) under the inertia effect after the swing arm 2 is lifted to the limit height.

Claims

1. The utility model provides a foldable work arm machinery limit for height device, includes upper bracket (10) and radial arm (2), and radial arm (2) and upper bracket (10) hinged joint, its characterized in that: the upper frame (10) is provided with a fixing device, and the fixing device is connected with the connecting rod (5); the connecting rod (5) is connected with the left rocker arm (4) and the right rocker arm (3); the left rocker arm (4) and the right rocker arm (3) are connected with the swing arm (2).

2. The folding work arm mechanical height limiting device of claim 1, wherein: the fixing device comprises a base (9), a fixing block (6) is arranged on the base (9), pin shafts are arranged on the base (9) and the fixing block (6), and the base (9) and the fixing block (6) are connected with a connecting rod (5) through the pin shafts; the base (9) and the fixing block (6) are fixed through a fastening bolt (11).

3. The folding work arm mechanical height limiting device of claim 2, wherein: the base (9) and the fixed block (6) are provided with a baffle (7) outside the pin shaft, and the baffle (7) is welded on the fixed block (6).

4. The folding work arm mechanical height limiting device of claim 2 or 3, wherein: and a limiting plate (8) is arranged at the front end of the hinged part of the base (9), the fixed block (6) and the connecting rod (5).

5. The folding work arm mechanical height limiting device of claim 1, wherein: the connecting rod (5) is hinged with the left rocker arm (4) and the right rocker arm (3), and the left rocker arm (4) and the right rocker arm (3) are hinged with the swing arm (2).

6. The folding work arm mechanical height limiting device of claim 5, wherein: the upper hinge guide hole at the hinge joint of the connecting rod (5) and the left rocker arm (4) and the right rocker arm (3) is a long hole or a special-shaped hole.