CN-121993452-A - Piston deflection-preventing oil cylinder

Abstract

The invention discloses a piston deflection-preventing oil cylinder, which belongs to the technical field of oil cylinders and comprises a cylinder barrel, wherein a guide fixing nut is fixedly connected in the upper end of the cylinder barrel, a guide sealing ring is fixedly connected in the guide fixing nut, a piston is connected in the guide sealing ring in a sliding manner, a deflection-preventing guide rod is connected in the piston in a penetrating sliding manner, the bottom end of the cylinder barrel is fixedly connected with a cylinder bottom thread plate through a third fixing bolt, a cylinder bottom sealing plate is arranged on the upper surface of the cylinder bottom thread plate, and the deflection-preventing guide rod is fixedly connected on the cylinder bottom sealing plate. According to the invention, through the arrangement of the six-edge guide column, the piston rod is limited to rotate by the guide column in the moving process, so that the problem that the piston deflects in the up-and-down moving process is effectively avoided.

Inventors

• LI SHICHUN
• PAN RANRAN

Assignees

• 平原精科液压技术有限公司

Dates

Publication Date

20260508

Application Date

20260402

Claims (6)

1. 1. The piston deflection-preventing oil cylinder comprises a cylinder barrel (5) and is characterized in that a guide fixing nut (4) is fixedly connected in the upper end of the cylinder barrel (5), a guide sealing ring (3) is fixedly connected in the guide fixing nut (4), a piston (7) is connected in the guide sealing ring (3) in a sliding manner, and a deflection-preventing guide rod (11) is connected in the piston (7) in a penetrating sliding manner.
2. 2. The piston deflection prevention cylinder according to claim 1, wherein the bottom end of the cylinder barrel (5) is fixedly connected with a cylinder bottom thread plate (9) through a third fixing bolt (13), a cylinder bottom sealing plate (8) is arranged on the upper surface of the cylinder bottom thread plate (9), and a deflection prevention guide rod (11) is fixedly connected to the cylinder bottom sealing plate (8).
3. 3. The piston anti-deflection oil cylinder according to claim 1, wherein the anti-deflection guide rod (11) is slidably connected with an anti-deflection guide ring (10), and the anti-deflection guide ring (10) is fixedly connected to the lower end of the piston (7) through a second fixing bolt (12).
4. 4. A piston deflection preventing cylinder according to claim 3, wherein the deflection preventing guide rod (11) is provided in a hexagonal prism shape. The cylinder barrel (5) is sleeved with a flange plate (6).
5. 5. The piston deflection prevention cylinder according to claim 4, wherein an oil supply joint (16) is fixedly connected to one side of the cylinder barrel (5), an oil pipe (15) is fixedly connected to the oil supply joint (16), and an oil supply distribution block (14) is fixedly connected to one end of the oil pipe (15) away from the oil supply joint (16).
6. 6. The piston deflection prevention cylinder according to claim 1, wherein the upper end of the piston (7) is fixedly connected with a bearing plate (1) through a first fixing bolt (2).

Description

Piston deflection-preventing oil cylinder Technical Field The invention belongs to the technical field of oil cylinders, and particularly relates to an anti-deflection oil cylinder of a piston. Background The hydraulic cylinder is a linear executive component for converting hydraulic energy into mechanical energy in a hydraulic system, and generally consists of a cylinder barrel, an end cover, a piston rod and a sealing element, wherein the piston is pushed by hydraulic oil to do reciprocating linear motion in the cylinder barrel, so that an external mechanism is driven to finish pushing, pulling and other actions. Uneven wear or direct blocking caused by deflection often occurs in the use process of the piston, and the reason is that when the load direction is not along the axis, the piston rod stretches out too long to cause dead weight sagging, the installation accuracy is insufficient or the guide sleeve is worn, the piston rod can generate bending moment like a cantilever beam under the action of gravity or external force, so that the piston is forced to work in the cylinder barrel normally. Disclosure of Invention The technical problem to be solved by the invention is to overcome the defects of the prior art and provide the piston deflection-preventing oil cylinder. The technical scheme for solving the technical problems is that the piston deflection-preventing oil cylinder comprises a cylinder barrel, wherein a guide fixing nut is fixedly connected in the upper end of the cylinder barrel, a guide sealing ring is fixedly connected in the guide fixing nut, a piston is connected in the guide sealing ring in a sliding manner, and a deflection-preventing guide rod is connected in the piston in a penetrating and sliding manner. Through the technical scheme, the guide fixing nut is used for realizing positioning and fastening of the guide sealing ring, ensuring that the guide sealing ring is stably arranged inside the upper end of the cylinder barrel, providing stable sliding guide and sealing support for the piston, simultaneously preventing the deflection guide rod from penetrating inside the piston, providing axial guide constraint from the central position of the piston, limiting circumferential rotation and radial deflection of the piston in the cylinder barrel, fundamentally avoiding deflection of the piston due to external force or dead weight, and ensuring stable movement of the piston along a straight line. Further, the bottom of cylinder passes through third fixing bolt fixedly connected with cylinder bottom screw thread board, the upper surface of cylinder bottom screw thread board is provided with cylinder bottom closing plate, fixedly connected with prevents deflecting guide bar on the cylinder bottom closing plate. Through above-mentioned technical scheme, the detachable rigid connection of cylinder bottom thread board and cylinder bottom is realized to the third fixing bolt, and the cooperation clearance between cylinder bottom thread board and the cylinder is filled to the cylinder bottom closing plate of being convenient for later stage dismouting maintenance, promotes the sealing performance of cylinder bottom, prevents that hydraulic oil from leaking, and the cylinder bottom closing plate provides stable mounting base for preventing deflection guide bar simultaneously, guarantees that deflection guide bar keeps coaxial center fixed with the cylinder, provides accurate, firm direction benchmark for the piston slides. Further, the deflection preventing guide rod is connected with a deflection preventing guide ring in a sliding mode, and the deflection preventing guide ring is fixedly connected to the lower end of the piston through a second fixing bolt. Through the technical scheme, the deflection-preventing guide ring is sleeved on the deflection-preventing guide rod and fixed with the lower end of the piston, the guide contact area of the piston and the deflection-preventing guide rod is increased, the guide stability and the stress uniformity are improved, the second fixing bolt is used for realizing firm connection of the deflection-preventing guide ring and the piston, the guide ring is prevented from loosening and falling off in the reciprocating motion of the piston, the piston and the deflection-preventing guide ring form a synchronous motion structure, and the deflection-preventing constraint effect is further enhanced. Further, the deflection-preventing guide rod is arranged in a hexagonal prism shape. And a flange plate is sleeved outside the cylinder barrel. Through above-mentioned technical scheme, hexagonal prism structure prevent deflection guide bar can restrict piston circumference rotation, compares circular guide bar and possesses stronger anti-torsion, prevents deflection ability, effectively avoids the piston to appear rotating the skew in the motion, and the cylinder outside ring flange is convenient for the hydro-cylinder wholly fix a position the installation with ex