hydraulic cylinder

Abstract

The invention relates to a hydraulic cylinder. The hydraulic cylinder comprises a cylinder barrel and a piston rod, wherein the piston rod is positioned in the cylinder barrel and is provided with a guide hole. The hydraulic cylinder further comprises a guide rod and a locking mechanism, wherein the guide rod is in match with the guide hole in the piston rod in order to limit the piston rod to rotate relatively to the guide rod; and the locking mechanism is used for controlling the guide rod and the piston rod to switch between a locking state in which the cylinder barrel can not relatively rotate and an unlocking state in which the cylinder barrel can relatively rotate. According to the technical scheme, the piston rod can be prevented from rotating under the combined action of the piston rod, the guide rod and the locking mechanism; the locking mechanism can be switched between the locking state and the unlocking state; and once the locking mechanism is in the unlocking state, the angle of the piston rod can be conveniently adjusted, so that the purpose of preventing the piston rod from rotating can be realized, and the angle position of the piston rod can be randomly adjusted.

Description

technical field [0001] The invention relates to a hydraulic cylinder, in particular to a piston rod anti-rotation mechanism in the hydraulic cylinder. Background technique [0002] At present, when ordinary hydraulic cylinders are stretching, due to reasons such as load eccentricity and uneven circumferential fit, the piston rod will produce a certain amount of rotation when it moves, resulting in a linear motion combined with rotation. When the piston rod is installed without coupling constraints due to work requirements, but it is necessary to output precise linear motion without rotation, the anti-rotation of the piston rod will become very important. [0003] At present, the anti-rotation of the hydraulic cylinder is mainly realized by two structures, the built-in anti-rotation and the external anti-rotation. The built-in anti-rotation device is generally such as figure 1 As shown, a guide rod 3 is set between the cylinder bottom 1 and the guide sleeve 2, and a hole is...

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned existing anti-rotation technologies all fix the radial angle between the piston rod and the cylinder body to prevent the piston rod from appearing in a linear motion while additional rotation. The disadvantage is that once the hydraulic cylinder is assembled, if it needs to Adjusting the angle of the piston rod to the cylinder will become very difficult, especially figure 1 , figure 2 and image 3 The program cannot be adjusted at all, Figure 4 The scheme also needs to remove some parts of the hydraulic cylinder before adjustment can be made, and it cannot be adjusted under load

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