CN212985677U

CN212985677U - Anti-rotation device for piston rod of oil cylinder

Info

Publication number: CN212985677U
Application number: CN202021634188.2U
Authority: CN
Inventors: 潘东祥; 朱晓兵
Original assignee: Wuxi Haihang Electro-Hydraulic Servo System Of Ltd By Share Ltd
Current assignee: Wuxi Hengsheng Technology Co.,Ltd.
Priority date: 2020-08-08
Filing date: 2020-08-08
Publication date: 2021-04-16
Anticipated expiration: 2030-08-08

Abstract

The utility model provides a piston rod rotation preventing device of hydro-cylinder, its rotatory technical problem of piston rod that can solve the hydro-cylinder. The utility model provides a piston rod anti-rotation device of hydro-cylinder which characterized in that: anti-rotation device includes the extension bar, the tail-section of thick bamboo and the rotatory module of body of rod rotation, the both sides of piston are located to extension bar and the coaxial setting of piston rod branch, the extension bar passes and stretches into the tail-section of thick bamboo behind the rear end cap, rear end ear seat, tail-section of thick bamboo and rear end cap fixed connection in proper order, the guide way that extends along piston rod axis direction is seted up to the lateral wall of tail-section of thick bamboo, the rotatory module of body of rod rotation includes bearing and round pin axle, the bearing is connected in selling epaxial and being located the guide way. The utility model discloses a prevent that rotation module and guide way direction cooperation to prevent that the piston rod from rotating.

Description

Anti-rotation device for piston rod of oil cylinder

Technical Field

The utility model relates to a hydro-cylinder technical field, concretely relates to anti-rotation device of piston rod of hydro-cylinder.

Background

In practical application, the phenomenon that the piston rod rotates can occur after the oil cylinder does long-time reciprocating motion, so that the earrings connected with the piston rod can be withdrawn after being used for a period of time, the connection stability is poor, the overhaul is frequent, the working efficiency is influenced, and potential safety hazards exist.

SUMMERY OF THE UTILITY MODEL

The utility model provides a piston rod rotation preventing device of hydro-cylinder, its rotatory technical problem of piston rod that can solve the hydro-cylinder.

Its technical scheme is like, a piston rod anti-rotation device of hydro-cylinder, hydro-cylinder include piston rod, piston and cylinder body, the piston rod stretches into connect behind the cylinder body the piston, the both ends of cylinder body be connected with piston rod seal complex front end housing, rear end cap, its characterized in that: the anti-rotation device includes extension bar, tail section of thick bamboo and the anti-rotation module of the body of rod, the extension bar with the coaxial setting of piston rod is divided and is located the both sides of piston, the extension bar passes stretch into behind the rear end cap the tail section of thick bamboo, rear end ear seat the tail section of thick bamboo with rear end cap fixed connection in proper order, the edge has been seted up to the lateral wall of tail section of thick bamboo the guide way that the piston rod axis direction extends, the anti-rotation module of the body of thick bamboo includes bearing and round pin axle, the bearing connect in sell epaxial and be located in the guide way, the round pin axle lower extreme is connected the extension bar.

Furthermore, the two ends of the inner cavity of the tail cylinder are connected with limiting blocks, the end part of the extension rod is connected with a stop block, and the lower end of the pin shaft is connected with the stop block.

Further, the tail-cone is fixed in through the pull rod between rear end cover, the rear end ear seat, the piston rod anti-rotation device still include with the barrel anti-rotation module of every stopper one-to-one, the barrel is prevented rotation module and is included sliding block, stop pin, spring and handle, the sliding block install in the pull rod, the guiding hole along the radial extension of piston rod is seted up to the sliding block, the stop pin install in the guiding hole, the one end of stop pin runs through behind the sliding block with handle threaded connection, the other end stretch into in the positioning hole of stopper, the spring housing is located outside the stop pin, the both ends difference elasticity butt of spring the step face of guiding hole with the step face of stop pin.

Furthermore, the sliding block is connected with at least two pull rods in a sliding mode.

The utility model discloses a piston rod rotation preventing device, through set up the guide way on the tail-cone, set up rotation preventing module on the extension bar with the coaxial setting of piston rod, rotation preventing module and guide way direction cooperation to prevent that the piston rod from rotating, rotation preventing module passes through bearing and guide way roll-type fit, in order to reduce wearing and tearing, reduces between guide way and the rotation preventing module because of the fit clearance's that leads to after using repeatedly increment, reduces the piston rod and deflects.

Drawings

Fig. 1 is a schematic sectional view of the piston rod rotation preventing device according to the present invention, wherein the cylinder, the front end cap and the piston rod body are not shown.

Fig. 2 is a schematic top view of the anti-rotation device for the piston rod according to the present invention, wherein the cylinder, the front end cap, the piston and the piston rod are not shown.

Fig. 3 is a schematic structural view of the anti-rotation module of the rod body according to the present invention.

Fig. 4 is a schematic structural view of the rotation prevention module for the barrel of the present invention.

Detailed Description

As shown in fig. 1-4, a piston rod 1 anti-rotation device of hydro-cylinder, the hydro-cylinder includes piston rod 1, piston 2 and cylinder body, piston rod 1 connects piston 2 after stretching into the cylinder body, the both ends of cylinder body are connected with the front end housing with piston rod 1 seal fit, rear end cap 3, anti-rotation device includes extension bar 4, tail section of thick bamboo 5 and the rotatory module 6 of body of rod anti-rotation, extension bar 4 sets up and locates the both sides of piston 2 with piston rod 1 is coaxial, extension bar 4 passes and stretches into tail section of thick bamboo 5 behind the rear end cap 3, rear end ear seat 10, tail section of thick bamboo 5 and rear end cap 3 are fixed connection in proper order, tail section of thick bamboo 5 has seted up the guide way 51 that extends along piston rod 1 axis direction, body of rod anti-rotation module 6 includes bearing 61 and round pin axle 62, bearing 61 passes through nut 64, packing ring 63 is fixed in on the step face of.

The inner chamber both ends of tail-barrel 5 are connected with stopper 7, and the end connection of extension bar 4 has dog 8, through stopper and dog 8 cooperation restriction piston rod 1's stroke. The lower end of the pin shaft 62 is connected with a stop block 8, the tail cylinder 5 is fixed between the rear end cover 3 and the rear end ear seat 10 through a pull rod 5 (the cylinder body is fixed between the front end cover and the rear end cover through a front pull rod, the front pull rod and the rear pull rod are connected with a nut to clamp and fix the cylinder body and the tail cylinder), the anti-rotation device of the piston rod 1 also comprises a cylinder anti-rotation module 9 which is in one-to-one correspondence with each limit block 7, the cylinder anti-rotation module 9 comprises a sliding block 91, a stop pin 92, a spring 93 and a handle 94, the sliding block 91 is arranged on the rear pull rod 5, concretely, the sliding block 91 is in sliding connection with a pair of rear pull rods 5 to prevent the sliding block 91 from deflecting, the sliding block 91 is provided with a guide hole which extends along the radial direction of the piston rod 1, the stop pin 92 is arranged on, both ends of the spring 93 elastically abut against a step surface of the guide hole and a step surface of the stopper pin 92, respectively. Because be connected through the anti-rotation module of the body of rod between a tail section of thick bamboo and extension bar 4, extension bar 4 can follow a tail section of thick bamboo, and through addding the rotatory module of barrel, rotatory handle pushes the locating hole of stopper with the stop pin, can prevent that the tail section of thick bamboo from rotating at the circumferencial direction.

For the oil cylinder with double outlet rods, the extension rod and the tail cylinder are parts of the oil cylinder, and for the oil cylinder with single outlet rod, the extension rod and the tail cylinder need to be additionally arranged.

Claims

1. The utility model provides a piston rod anti-rotation device of hydro-cylinder, the hydro-cylinder includes piston rod, piston and cylinder body, the piston rod stretches into connect behind the cylinder body the piston, the both ends of cylinder body be connected with piston rod seal complex front end housing, rear end cap, its characterized in that: the anti-rotation device includes extension bar, tail section of thick bamboo and the anti-rotation module of the body of rod, the extension bar with the coaxial setting of piston rod is divided and is located the both sides of piston, the extension bar passes stretch into behind the rear end cap the tail section of thick bamboo, rear end ear seat the tail section of thick bamboo with rear end cap fixed connection in proper order, the edge has been seted up to the lateral wall of tail section of thick bamboo the guide way that the piston rod axis direction extends, the anti-rotation module of the body of thick bamboo includes bearing and round pin axle, the bearing connect in sell epaxial and be located in the guide way, the round pin axle lower extreme is connected the extension bar.

2. The anti-rotation device for the piston rod of the oil cylinder according to claim 1, wherein: the tail cylinder is characterized in that two ends of an inner cavity of the tail cylinder are connected with limiting blocks, the end part of the extension rod is connected with a stop block, and the lower end of the pin shaft is connected with the stop block.

3. The anti-rotation device for the piston rod of the oil cylinder as claimed in claim 2, wherein: the tail-barrel is fixed in through the pull rod between rear end cover, the rear end ear seat, the anti-rotation device of piston rod still includes the barrel anti-rotation module with every stopper one-to-one, the barrel anti-rotation module includes sliding block, stop pin, spring and handle, the sliding block install in the pull rod, the guiding hole along the radial extension of piston rod is seted up to the sliding block, the stop pin install in the guiding hole, the one end of stop pin is run through behind the sliding block with handle threaded connection, the other end stretch into in the positioning hole of stopper, the spring housing is located outside the stop pin, the both ends difference elasticity butt of spring the step face of guiding hole with the step face of stop pin.

4. The anti-rotation device for the piston rod of the oil cylinder as claimed in claim 3, wherein: the sliding block is at least connected with the two pull rods in a sliding mode.