Bucket cylinder

Abstract

The invention discloses a bucket cylinder, and belongs to the technical field of oil cylinder development. The bucket cylinder comprises a cylinder component and a piston component, wherein the piston component sleeves the inner circumferential surface of the cylinder component; a piston rod of the piston component is adhered to the inner circumferential surface of a small circular inner diameter part of a guide sleeve of the cylinder component; an annular gap is formed between the piston rod and the inner circumferential surface of the large circular inner diameter part of the guide sleeve; the piston of the piston component is adhered to the inner circumferential surface of the cylinder of the cylinder component; the piston rod, a screw nut and a rear buffer sleeve of the piston component, and the cylinder bottom of the cylinder component form a rear buffer; a front buffer sleeve, the piston and the piston rod of the piston component and the and the guide sleeve of the cylinder component form a front buffer. Due to automatic flotation centering of the front buffer sleeve and the rear buffer sleeve, a good buffer effect is achieved, the requirement on the coaxiality of components is low, and the components are easy to process.

Description

technical field [0001] The invention belongs to the technical field of oil cylinder development, and in particular relates to a bucket oil cylinder. Background technique [0002] Backhoe loader is a widely used multifunctional construction machinery. Because it can quickly replace a variety of operating devices and varieties, high quality and high efficiency, it is favored by the majority of construction units, and its manufacturing industry is also booming; In the process, the speed is fast, the efficiency is high, the maneuverability is good, and the operation is easy; at the same time, when the cylinder moves to the fully extended end and fully retracted end, it is required to run smoothly and withstand shocks, that is, the cylinder is required to be cushioned before and after. [0003] For the existing fixed buffer cylinder structure, please refer to the attached figure 1 , including: cylinder head B21, rear buffer sleeve B22, piston B23, front buffer sleeve B24, pisto...

AI Technical Summary

Problems solved by technology

[0003] For the existing fixed buffer cylinder structure, please refer to the attached figure 1 , including: cylinder head B21, rear buffer sleeve B22, piston B23, front buffer sleeve B24, piston rod B25, cylinder barrel B26, guide sleeve B27 and rod head 28; among them, rear buffer sleeve B22 and piston rod B25 are connected through threads, It is fixed as the rear fixed buffer, which forms a gap buffer with the inner hole of the cylinder head B21; however, the gap buffer has a high coaxiality of the rear buffer sleeve B22, piston rod B25 and other parts and assembled components. Requirements, the difficulty of processing increases, often because the coaxiality does not meet the requirements, the outer circle of the buffer sleeve B22 has to be turned to increase the buffer gap, and the buffer effect is poor; moreover, when the buffer effect of the rear fixed buffer is good, due to the rear buffer The contact surface between the outer circle of the sleeve B22 and the inner hole of the cylinder head B21 is long. When the piston rod B25 drives the piston B23 to extend outward, due to the buffering effect, a small section of the piston rod B25 will extend slowly. Only when the rear buffer sleeve B22 is completely When detached from the inner hole of the cylinder head B21, the extension speed of the piston rod B25 will be accelerated, that is, the extension of the piston rod B25 will start slowly; similarly, the front buffer sleeve B24, the piston B23, and the piston rod B25 pass through the inner thread of the rear buffer sleeve B22 and The external thread of the piston rod B25 is connected, and the piston B23 and the front buffer sleeve B24 are pressed tightly to fix the front fixed buffer; the front fixed buffer also has the same problem as the rear fixed buffer, and the processing of parts is difficult, which may cause poor buffer effect. Piston rod B25 retracts slowly

In this way, it cannot meet the requirements of some construction machinery for the cylinder to start fast, run fast, and be light and stable.

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