CN214092526U

CN214092526U - Novel telescopic oil cylinder

Info

Publication number: CN214092526U
Application number: CN202022812730.5U
Authority: CN
Inventors: 邱永宁; 郭皓元; 兰根招; 李丹丹
Original assignee: Jiangsu Hengli Hydraulic Co Ltd
Current assignee: Jiangsu Hengli Hydraulic Co Ltd
Priority date: 2020-11-30
Filing date: 2020-11-30
Publication date: 2021-08-31
Anticipated expiration: 2030-11-30

Abstract

The utility model discloses a novel flexible hydro-cylinder, the novel hydraulic cylinder comprises a cylinder, cylinder bottom and cylinder head are installed respectively to the both ends of cylinder, be equipped with in the cylinder and install piston rod and piston, the piston rod includes the hollow body of rod, rod end and pole head, the mounting hole has on the piston, the rod end cover is established in the mounting hole to both ends stretch out in the piston, piston threaded connection is in the inside of hollow body of rod rear end, pole head threaded connection is in the inside of hollow body of rod front end. In this way, the utility model discloses flexible hydro-cylinder can adopt split type threaded connection mode to assemble the piston rod, reduces welding process, reduction in production cost.

Description

Novel telescopic oil cylinder

Technical Field

The utility model relates to a hydro-cylinder field especially relates to a novel flexible hydro-cylinder.

Background

The conventional long-stroke telescopic oil cylinder has the advantages that large and small cavities are concentrated on the rod head, the piston rod is designed to be of a hollow structure because a customer has a weight requirement on the oil cylinder, and in order to meet the requirement that hydraulic oil can reach the large and small cavities of the oil cylinder from the rod head, the piston rod is usually designed to be internally welded with an oil pipe to meet the oil running requirement of the piston rod. The piston rod of the existing telescopic oil cylinder is generally connected into an integrated structure through welding, the machining process is complex, and the cost is high.

Disclosure of Invention

The utility model discloses the main technical problem who solves provides a novel flexible hydro-cylinder, can adopt split type threaded connection mode to assemble the piston rod, reduces welding process, reduction in production cost.

In order to solve the technical problem, the utility model discloses a technical scheme be: the utility model provides a novel telescopic oil cylinder, including the cylinder, cylinder end and cylinder head are installed respectively to the both ends of cylinder, be equipped with in the cylinder and install piston rod and piston, the piston rod includes the hollow body of rod, rod end and pole head, the mounting hole has on the piston, the rod end cover is established in the mounting hole to both ends stretch out in the piston, piston threaded connection is in the inside of hollow body of rod rear end, pole head threaded connection is in the inside of hollow body of rod front end.

In a preferred embodiment of the present invention, the hollow shaft has screw holes at front and rear ends thereof, and screws are screwed into the screw holes to fasten the rod head and the piston.

In a preferred embodiment of the present invention, a rod end axial oil passing channel is disposed on the rod end, a rod end axial oil passing channel is disposed on the rod head, an oil pipe is connected between the rod end axial oil passing channel and the rod end axial oil passing channel, and the rod end axial oil passing channel is communicated with the rod-free cavity of the cylinder.

In a preferred embodiment of the present invention, the rod end is further provided with a rod end radial oil passing channel, the piston is provided with a piston radial oil passing channel, the rod end radial oil passing channel is communicated with the rod end axial oil passing channel at the upper end, the lower end is communicated with the piston radial oil passing channel, and the piston radial oil passing channel is communicated with the rod cavity of the cylinder.

In a preferred embodiment of the present invention, the head and the rod end have positioning grooves inside, sealing members are disposed in the positioning grooves, and both ends of the oil pipe are fastened and sealed by O-rings.

In a preferred embodiment of the present invention, a nut is screwed to the rear end of the rod end, and the rod end is locked to the piston by the nut.

In a preferred embodiment of the present invention, the front end of the cylinder has an external thread section, the rear end has an internal thread section, the head is screwed onto the external thread section of the cylinder, and the bottom is screwed onto the internal thread section of the cylinder.

In a preferred embodiment of the present invention, the front end of the cylinder head is internally threaded with a guide sleeve, which is attached to the hollow rod.

In a preferred embodiment of the present invention, a stopper tube is sleeved outside the hollow rod, and an O-ring is disposed between the stopper tube and the hollow rod.

The utility model has the advantages that: the utility model discloses flexible hydro-cylinder can adopt split type threaded connection mode to assemble the piston rod, reduces welding process, reduction in production cost.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive work, wherein:

fig. 1 is a schematic structural view of a preferred embodiment of the telescopic cylinder of the present invention;

FIG. 2 is a schematic view of a portion of the structure of FIG. 1;

FIG. 3 is a schematic view of a portion of the structure of FIG. 1;

the parts in the drawings are numbered as follows: 1. the cylinder barrel 11, the rodless cavity 12, the rod cavity 2, the cylinder bottom 3, the cylinder head 4, the piston rod 41, the hollow rod body 411, the screw hole 42, the rod end 421, the rod end axial oil passing channel 422, the rod end radial oil passing channel 423, the positioning groove 43, the rod head 431, the rod head axial oil passing channel 5, the piston 51, the piston radial oil passing channel 6, the oil pipe 7, the nut 8, the guide sleeve 9 and the stop pipe.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it should be apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1 to 3, a novel telescopic cylinder includes a cylinder barrel 1, a cylinder bottom 2 and a cylinder head 3 are respectively installed at two ends of the cylinder barrel 1, a piston rod 4 and a piston 5 are installed in the cylinder barrel 1, the piston rod 4 includes a hollow rod body 41, a rod end 42 and a rod head 43, a mounting hole is provided on the piston 5, the rod end 42 is sleeved in the mounting hole, and two ends of the rod end extend out of the piston 5, the piston 5 is in threaded connection with the inside of the rear end of the hollow rod body 41, and the rod head 43 is in threaded connection with the inside of the front end of the hollow rod body 41. The external screw thread of piston 5 and the internal thread of the hollow body of rod 41 carry out threaded connection, and rod end 42 sets up in piston 5, fixes a position through piston 5, has avoided the welding of rod end 42 and the body of rod 41, and the same and hollow body of rod 41 of rod head 43 adopt threaded connection, reduces welding process again.

In addition, the hollow shaft 41 has screw holes 411 at both front and rear ends thereof, and screws (not shown) are screwed into the screw holes 411 to fasten the rod head 43 and the piston 5. The piston 5 is formed by processing round steel and is positioned and locked through a screw, so that the space can be well saved, the weight of the oil cylinder is greatly reduced, and the stability of the overhead working truck is improved. The piston 5 and the rod head 43 are provided with O-shaped ring grooves (not marked in the figure) in a turning way, and after the O-shaped ring grooves are screwed with the hollow rod body 41, the sealing effect inside the piston rod is well solved. Therefore, the problem that the welding rod head 43 is welded, the welding amount is reduced, the allowance is left before welding, and the material is wasted due to the reprocessing after welding is solved.

In addition, a rod end axial oil passing channel 421 is formed in the rod end 42, a rod end axial oil passing channel 431 is formed in the rod head 43, an oil pipe 6 is connected between the rod end axial oil passing channel 421 and the rod end axial oil passing channel 431, and the rod end axial oil passing channel 431 is communicated with the rodless cavity 11 of the cylinder barrel.

In addition, a rod end radial oil passing channel 422 is further arranged on the rod end 42, a piston radial oil passing channel 51 is arranged on the piston 5, the upper end of the rod end radial oil passing channel 422 is communicated with the rod end axial oil passing channel 421, the lower end of the rod end radial oil passing channel is communicated with the piston radial oil passing channel 51, and the piston radial oil passing channel 51 is communicated with the rod cavity 12 of the cylinder barrel 1.

In addition, the rod head 43 and the rod end 42 have positioning grooves 423 inside, sealing members are provided in the positioning grooves 423, and both ends of the oil pipe 6 are fastened and sealed by the sealing members. The oil pipe 6 abandons the conventional welding structure, positioning grooves are processed on the rod head 43 and the rod end 42, the oil pipe 6 is fixed inside the piston rod 4 in a sealing manner of a sealing element, and the welding and circulating time is reduced.

Further, a nut 7 is screwed to the rear end of the rod end 42, and the rod end 42 is locked to the piston 5 by the nut 7.

In addition, the front end of the cylinder barrel 1 is provided with an external thread section, the rear end is provided with an internal thread section, the cylinder head 3 is in threaded connection with the external thread section of the cylinder barrel 1, and the cylinder bottom 2 is in threaded connection with the internal thread section of the cylinder barrel 1. The cylinder barrel 1 abandons the structure of the cylinder barrel 1 and the cylinder head flange butt welding before, and external threads are directly processed on the cylinder barrel 1, and the cylinder head 3 is screwed on the cylinder barrel. The material cost, the welding circulation period and the processing difficulty are greatly saved.

In addition, the inner thread of the front end of the cylinder head 3 is connected with a guide sleeve 8, and the guide sleeve 8 is attached to the hollow rod body 41. The guide sleeve 3 is also designed in the form of a thread, rather than a screw. When in assembly, the cylinder head 3 is directly screwed down, and the punching point is loose-proof at last, thereby not only playing a good loose-proof role, but also greatly shortening the assembly time. The cylinder bottom is also ingeniously designed into a structural form of a thread structure and O-shaped ring sealing, and the cylinder bottom can be directly screwed on the cylinder during assembly, so that welding is avoided.

In addition, the outside of the hollow rod body 41 is sleeved with the stopping tube 9, and an O-shaped ring (not marked in the figure) is arranged between the stopping tube 9 and the hollow rod body 41, so that the movement of the stopping tube 9 on the hollow rod body 41 can be well prevented, and the rod body can be prevented from being provided with a step-down processing procedure.

Be different from prior art, the utility model discloses flexible hydro-cylinder can adopt split type threaded connection mode to assemble the piston rod, reduces welding process, reduction in production cost.

The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all of which utilize the equivalent structure or equivalent flow transformation made by the content of the specification of the present invention, or directly or indirectly applied to other related technical fields, all included in the same way in the patent protection scope of the present invention.

Claims

1. The utility model provides a novel telescopic cylinder, includes the cylinder, cylinder bottom and cylinder head are installed respectively to the both ends of cylinder, its characterized in that, be equipped with in the cylinder and install piston rod and piston, the piston rod includes the hollow body of rod, rod end and pole head, the mounting hole has on the piston, the rod end cover is established in the mounting hole to both ends stretch out in the piston, piston threaded connection is in the inside of hollow body of rod rear end, pole head threaded connection is in the inside of hollow body of rod front end.

2. The novel telescopic cylinder according to claim 1, wherein the hollow rod body is provided with screw holes at the front end and the rear end, and screws are screwed into the screw holes to fasten the rod head and the piston.

3. The novel telescopic oil cylinder as claimed in claim 2, wherein the rod end is provided with a rod end axial oil passing channel, the rod head is provided with a rod head axial oil passing channel, an oil pipe is connected between the rod end axial oil passing channel and the rod head axial oil passing channel, and the rod end axial oil passing channel is communicated with the rodless cavity of the cylinder barrel.

4. The novel telescopic oil cylinder as claimed in claim 3, wherein a rod end radial oil passing channel is further arranged on the rod end, a piston radial oil passing channel is arranged on the piston, the upper end of the rod end radial oil passing channel is communicated with the rod end axial oil passing channel, the lower end of the rod end radial oil passing channel is communicated with the piston radial oil passing channel, and the piston radial oil passing channel is communicated with a rod cavity of the cylinder barrel.

5. The novel telescopic cylinder as claimed in claim 4, wherein the rod head and rod end have locating grooves inside, sealing elements are arranged in the locating grooves, and both ends of the oil pipe are fastened and sealed through the sealing elements.

6. The novel telescopic oil cylinder is characterized in that a nut is connected to the rear end of the rod end in a threaded mode, and the rod end is locked to the piston through the nut.

7. The novel telescopic oil cylinder as claimed in any one of claims 1 to 6, wherein the front end of the cylinder barrel is provided with an external thread section, the rear end of the cylinder barrel is provided with an internal thread section, the cylinder head is in threaded connection with the external thread section of the cylinder barrel, and the cylinder bottom is in threaded connection with the internal thread section of the cylinder barrel.

8. The novel telescopic oil cylinder as claimed in claim 7, wherein a guide sleeve is connected to the inner thread of the front end of the cylinder head, and the guide sleeve is attached to the hollow rod body.

9. The novel telescopic oil cylinder as claimed in claim 8, wherein a stop tube is sleeved outside the hollow rod body, and an O-ring is arranged between the stop tube and the hollow rod body.