Rotary member self-locking device and engineering machinery using same

Abstract

The invention discloses a rotary member self-locking device which comprises a cylinder rod and a cylinder barrel which are nested on the inner side and the outer side and fixedly connected with a rotary member and a fixing member respectively, wherein a first bump of the cylinder rod and the inner wall of the cylinder barrel form a first rotary pair; a second bump of the cylinder barrel and the outer surface of the cylinder rod form a second rotary pair; the first bump and the second bump are used for circumferentially dividing a medium space between the cylinder rod and the cylinder barrel into a first cavity chamber and a second cavity chamber which are relatively sealed; the first cavity chamber and the second cavity chamber are communicated with a switch valve connector opened in a normal state through a first through hole and a second through hole respectively; and a switch valve can be switched to a cut-off state according to the medium pressure of the first cavity chamber or the second cavity chamber to limit the relative movement of the cylinder rod and the cylinder barrel. The potential safety hazard caused by failure of rotation control is effectively avoided through a cooperative relationship of the members of the self-locking device, so that the safety reliability of the overall operation is guaranteed. On the basis, the invention further provides engineering machinery using the self-locking device.

Description

technical field [0001] The invention relates to the technical field of safety locking, in particular to a self-locking device for rotating components and construction machinery using the self-locking device. Background technique [0002] With the continuous development of science and technology, and the increase in the demand for aerial work in current production and life, aerial work vehicles have been widely used, which has greatly improved the safety and reliability of aerial equipment installation, maintenance and other operations. [0003] As we all know, most of the connection between the working bucket and the arm frame of the existing high-altitude operation vehicles adopts a sprocket hinge; specifically, the working bucket is installed on the sprocket shaft, and the chain pulls the sprocket to rotate when the chain moves, thereby controlling the working bucket relative to the boom. The frame rotates around the axis to a specific working position. However, in the lo...

AI Technical Summary

Problems solved by technology

However, in the long-term frequent use process, once there are unexpected situations, such as overloading of the working bucket, stuck sprocket, vibration, and quality defects of the chain itself, which cause the chain to crack or fail, there is a hidden danger of chain breakage; When the chain breaks, the working bucket will turn down uncontrollably, directly causing the staff in the working bucket to fall, causing casualties and seriously affecting the safety performance of the product

[0004] At present, for such high-altitude vehicles with sprockets connected to the work bucket, there are no special measures to prevent the chain from breaking and tipping. Instead, the possibility of chain breakage is reduced by increasing the safety factor of the chain, which obviously cannot eliminate the possibility; In addition, this technology can reduce the possibility of chain breakage caused by overload or vibration, but it cannot reduce the possibility of breakage caused by the quality of the chain itself

At the same time, by increasing the safety factor of the chain to prevent the chain from breaking, it will inevitably increase the size of the chain and the installation space

[0005] In fact, in the cooperative relationship where one is connected in rotation relative to the other, and the rotation range needs to be accurately controlled to meet safety requirements, there is a hidden danger of abnormal rotation of the rotating member after the rotation control fails.

[0006] In view of this, it is urgent to find another way to optimize the design of the rotating components, so as to effectively avoid the unsafe hidden dangers that may be caused by the failure of rotation control

Images