CN-224227887-U - Hydraulic limiting device for excavating arm of excavating loader

CN224227887UCN 224227887 UCN224227887 UCN 224227887UCN-224227887-U

Abstract

The utility model discloses a hydraulic limiting device for an excavating arm of an excavating loader, which comprises a base, wherein the base is connected with a swinging frame, 2 holes are formed in the base, a main pin is arranged in one hole, a piston is arranged in the other hole, one end of the main pin is connected with a main pressing plate, an elastic part which generates damping when the main pressing plate rotates is arranged on the main pressing plate, the other end of the main pin is connected with the piston through a connecting plate, and a spring for resetting the piston is arranged in the piston. The limiting stress part of the limiting device is separated from the moving part of the driving device and is flexibly connected, so that faults caused by deformation and clamping stagnation of the driving device due to stress of the device are avoided. The utility model has simple and reasonable structure, convenient part processing, low manufacturing cost and high stability.

Inventors

LUO JIANRU
LI DELIN
CHEN XINZUAN
HUA WENBO

Assignees

龙工（上海）精工液压有限公司

Dates

Publication Date: 20260512
Application Date: 20250417

Claims (2)

1. The utility model provides a digger loader excavating arm hydraulic pressure stop device, a serial communication port, including base (1), base (1) are connected with the swing frame, be equipped with 2 holes on base (1), be equipped with kingpin (6) in one of them downthehole, be equipped with piston (2) in the other downthehole, main clamp plate (5) are connected to one end of kingpin (6), be equipped with on main clamp plate (5) and be used for making main clamp plate (5) produce damped elastomeric element (4) when its rotation, piston (2) are connected through connecting plate (7) to the other end of kingpin (6), be equipped with spring (3) that are used for making piston (2) reset in piston (2).
2. The hydraulic limiting device for the excavating arm of the excavating loader according to claim 1, wherein the base (1) is provided with a return reset device (A) for correcting the angular offset of the main pressing plate (5).

Description

Hydraulic limiting device for excavating arm of excavating loader Technical Field The utility model relates to a hydraulic limiting device for an excavating arm, in particular to a hydraulic limiting device for an excavating arm of an excavating loader. Background The limiting device for the excavating arm of the excavating and loading machine is a safety protection device for the excavating and loading machine and has the main functions of limiting the position of the excavating arm when the excavating part of the excavating and loading machine stops working (the loading part works, idle running and stopping state), limiting the movement of the excavating arm, preventing the excavating arm from sinking and falling down due to the internal leakage of a hydraulic circuit under the action of gravity, and releasing the position limitation of the excavating arm when the excavating part of the excavating and loading machine works. Most of the excavating arms and swinging frames of the excavating loader in the prior art are hook-shaped limiting devices, and the main defects are that the self weight of the limiting hooks of the devices enters a limiting state, the driving rod has small power, and the like. Disclosure of Invention The utility model aims to solve the problem of providing a large arm limiting device of an excavating loader, which is simple and reasonable, easy to manufacture and stable in performance. In order to solve the problems, the utility model provides a hydraulic limiting device for an excavating arm of an excavating and loading machine, which comprises a base, wherein the base is connected with a swinging frame, 2 holes are formed in the base, a main pin is arranged in one hole, a piston is arranged in the other hole, one end of the main pin is connected with a main pressing plate, an elastic part which generates damping when the main pressing plate rotates is arranged on the main pressing plate, the other end of the main pin is connected with the piston through a connecting plate, and a spring for resetting the piston is arranged in the piston. Preferably, a return reset device for correcting the angle deviation of the main pressing plate is arranged on the base. When hydraulic oil is not introduced, the piston is in a first state (limit state) through a built-in spring, when the main pressing plate is in the limit state, the main pressing plate is in contact with an ear seat welded on an excavating arm of the excavating loader to limit the sinking and falling of the excavating arm, when the hydraulic oil is introduced, the piston is pushed by the hydraulic oil to overcome the acting force of the spring to move, the main pressing plate is driven by a connecting plate and a main pin to reach a second state (release state), when the main pressing plate is in the release state, the main pressing plate leaves the movable range of the ear seat on the excavating arm and cannot interfere the work of the excavating arm, when the excavating part does not work any more, the hydraulic oil of the limiting device is cut off, and the piston is restored to the limit state through the action of the spring. The limiting stress part (main pressing plate, main pin) of the limiting device is separated from the moving part (piston, spring, etc.) of the driving device, and is flexibly connected, so that the driving device is prevented from deforming and clamping stagnation due to the stress of the device. The utility model has simple and reasonable structure, convenient part processing, low manufacturing cost and high stability. Drawings FIG. 1 is a cross-sectional view of an excavating wall hydraulic spacing device of an excavating loader provided by the utility model; FIG. 2 is a side view of the hydraulic limiting device for the digging wall of the backhoe loader provided by the utility model; FIG. 3 is a schematic view of the different states of the hydraulic limiting device for the digging wall of the backhoe loader provided by the utility model; Fig. 4 is a schematic view of the present utility model mounted on an excavating loader. In fig. 1 to 4, 1 is a base, 2 is a piston, 3 is a spring, 4 is an elastic component, 5 is a main pressing plate, 6 is a main pin, 7 is a connecting plate, 8 is an excavating arm, 9 is a hydraulic limiting device, 10 is an excavating arm lug plate, 11 is a swinging frame, A is a return resetting device, B is a hydraulic oil inlet, C is an excavating arm lug seat, D is in a first state, and E is in a second state. Detailed Description In order to make the utility model more comprehensible, preferred embodiments accompanied with figures are described in detail below. Examples As shown in fig. 1-3, the hydraulic limiting device for the excavating arm of the excavating and loading machine provided by the utility model comprises a base 1, wherein the base 1 is connected with a swinging frame, 2 holes are formed in the base 1, a main pin 6 is arranged in one hole, a piston 2 is arran