CN214036357U

CN214036357U - Hydraulic oil cylinder

Info

Publication number: CN214036357U
Application number: CN202023344177.3U
Authority: CN
Inventors: 何俊峰; 姜小放
Original assignee: Loudi Zhongxing Hydraulic Parts Co Ltd
Current assignee: Loudi Zhongxing Hydraulic Parts Co Ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-08-24
Anticipated expiration: 2030-12-31

Abstract

The utility model relates to a drive arrangement technical field especially relates to a hydraulic cylinder. The hydraulic oil cylinder comprises a cylinder barrel, a piston, a stroke shaft and a limiting part. One end of the stroke shaft is connected with the piston, and the limiting part is opposite to the cylinder barrel and movably connected to the outer surface of the stroke shaft, so that the mounting position of the limiting part between the piston and the other end of the stroke shaft can be adjusted. The piston sets up in the cylinder, the piston can be for the cylinder do the piston motion, when spacing portion and cylinder butt, spacing portion can prevent the piston to continue the motion to the inside of cylinder, this hydraulic cylinder, the mounted position through the spacing portion of axial adjustment along the stroke axle, can adjust the maximum length that piston and stroke axle stretched into in the steel cylinder promptly, and then make hydraulic cylinder's stroke adjustable, furthermore, can adjust hydraulic cylinder's minimum length according to the mounting distance with between the load mechanism all the time, reduce hydraulic cylinder's unnecessary change, prolong hydraulic cylinder's life, be favorable to practicing thrift the cost.

Description

Hydraulic oil cylinder

Technical Field

The utility model relates to the field of hydraulic technology, especially, relate to a hydraulic cylinder.

Background

The stroke range of the traditional oil cylinder is a fixed value and is used for adapting to a load mechanism with a fixed position.

However, the load mechanism has a processing error, or after the load mechanism is worn after long-time operation, the position of the load mechanism changes, so that the conventional oil cylinder cannot be installed with the load mechanism or the conventional oil cylinder still drives the load mechanism to realize a preset function when the conventional oil cylinder runs to the tail end of a stroke.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a hydraulic cylinder to it is fixed to solve the hydro-cylinder formation scope among the prior art to a certain extent, leads to long-time back, leads to the hydro-cylinder to realize the technical problem of predetermined function with the unable installation of load mechanism or lead to unable drive load mechanism.

Based on the purpose, the utility model provides a hydraulic oil cylinder, including cylinder, piston, stroke axle and spacing portion;

one end of the stroke shaft is connected with the piston, and the limiting part is opposite to the cylinder barrel and is movably connected to the outer surface of the stroke shaft, so that the mounting position of the limiting part between the piston and the other end of the stroke shaft can be adjusted;

the piston is arranged in the cylinder barrel and can do piston movement relative to the cylinder barrel, and when the limiting portion is abutted against the cylinder barrel, the limiting portion can prevent the piston from continuing to move towards the inside of the cylinder barrel.

In any of the above technical solutions, optionally, the limiting portion is a limiting sleeve, and the limiting sleeve is sleeved on the outer surface of the stroke shaft.

In any of the above technical solutions, optionally, an external thread portion is disposed on an outer peripheral side wall of the stroke shaft, an internal thread portion is disposed on an inner peripheral side wall of the limiting sleeve, and the limiting sleeve and the stroke shaft are screwed together through the external thread portion and the internal thread portion;

the length of the external thread part is greater than that of the internal thread part.

In any of the above technical solutions, optionally, an outer contour of a radial cross section of the limiting sleeve is polygonal.

In any of the above technical solutions, optionally, a rod head is disposed at the other end of the stroke shaft, and a buffer member is disposed on an end surface of the limiting sleeve facing the rod head.

In any one of the above technical solutions, optionally, the buffering member is annular, an annular groove is formed in the end surface of the limiting sleeve facing the club head, an annular support is formed inside the annular groove, and the buffering member is disposed in the annular groove and sleeved on the outer surface of the annular support.

In any of the above technical solutions, optionally, the buffer member is a rubber pad, a silica gel pad, a composite rubber pad formed by a spring support and a rubber pad, or a composite silica gel pad formed by a spring support and a silica gel pad.

In any one of the above technical solutions, optionally, the hydraulic cylinder further includes a guide sleeve, and the guide sleeve covers the tail end of the cylinder barrel;

the stroke shaft can slidably penetrate through the guide sleeve and extend into the cylinder barrel, and the inner surface of the guide sleeve is in sealing fit with the outer surface of the stroke shaft.

Adopt above-mentioned technical scheme, the beneficial effects of the utility model are that:

the utility model provides a hydraulic cylinder, including cylinder, piston, stroke axle and spacing portion. One end of the stroke shaft is connected with the piston, and the limiting part is opposite to the cylinder barrel and movably connected to the outer surface of the stroke shaft, so that the mounting position of the limiting part between the piston and the other end of the stroke shaft can be adjusted. The piston sets up in the cylinder, and the piston can be for the cylinder do the piston motion, and when spacing portion and cylinder butt, spacing portion can stop the piston to the inside continuation motion of cylinder to through the mounted position of the spacing portion of axial adjustment along the stroke axle, can adjust the maximum length that piston and stroke axle stretched into in the steel cylinder promptly, and then make hydraulic cylinder's stroke adjustable. Furthermore, the stroke of the supporting rod is adjusted, the shortest length of the hydraulic oil cylinder is adjusted accordingly, the shortest length of the hydraulic oil cylinder can be adjusted according to the installation distance between the hydraulic oil cylinder and the load mechanism all the time, installation is guaranteed, the load mechanism can be driven to achieve a preset action, unnecessary replacement of the hydraulic oil cylinder is reduced, the service life of the hydraulic oil cylinder is prolonged, and cost saving is facilitated.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic view of a first structure of a hydraulic cylinder according to an embodiment of the present invention;

fig. 2 is a second schematic structural diagram of the hydraulic cylinder according to the first embodiment of the present invention.

Icon: 1-a piston; 2-a cylinder barrel; 3-a stroke axis; 4-a guide sleeve; 5-a limit sleeve; 6-the club head; 7-a second seal; 8-a first seal; 9-a cushioning member.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example one

Referring to fig. 1 and 2, the present embodiment provides a; fig. 1 is a first structural schematic diagram of a hydraulic oil cylinder provided in the embodiment; fig. 2 is a top view of fig. 1. In order to express the structure more clearly, fig. 1 is a sectional view, and fig. 2 is a partial sectional view.

Referring to fig. 1 and 2, the hydraulic cylinder provided in this embodiment includes a cylinder 2, a piston 1, a stroke shaft 3, and a limit portion.

One end of the stroke shaft 3 is connected with the piston 1, and the limiting part is opposite to the cylinder barrel 2 and is movably connected with the outer surface of the stroke shaft 3, so that the mounting position of the limiting part between the piston 1 and the other end of the stroke shaft 3 can be adjusted.

Wherein, spacing portion can be sleeve form or cubic, as long as can protrusion in the surface of stroke axle 3, plays the stroke limiting displacement who moves stroke axle 3 and all is in the protection scope of this application.

In addition, the adjustable connection is not limited to the threaded connection, and the adjustable connection is within the protection scope of the present application as long as the mounting position of the limiting part on the stroke shaft 3 can be adjusted. As an example, the stroke shaft 3 is provided with a plurality of slots sequentially arranged along the axial direction of the stroke shaft 3, and the limiting portion can be detachably clamped in any one of the slots.

Piston 1 sets up in cylinder 2, and piston 1 can be for 2 piston motions of doing of cylinder, and when spacing portion and 2 butt of cylinder, spacing portion can prevent piston 1 to 2 inside continuation motion of cylinder, that is to say, spacing portion has injectd the stroke that piston 1 stretched into cylinder 2, because spacing portion is adjustable at the mounted position of stroke axle 3 to the stroke of piston 1 that makes with stroke axle 3 simultaneous movement also can be adjusted.

It is understood that the stopper portion may be directly abutted against the cylinder tube 2 or indirectly abutted against the cylinder tube 2, as long as the stopper portion is abutted against the cylinder tube 2.

Alternatively, according to different requirements for formation in actual production, the same cylinder barrel 2 can be provided with a plurality of limiting parts with different lengths.

In this embodiment, in order to improve the stability of the piston 1 in piston movement, the hydraulic cylinder further includes a guide sleeve 4.

The guide sleeve 4 is capped at the rear end of the cylinder 2 so that the interior of the cylinder 2 is sealed.

The stroke shaft 3 can slidably penetrate through the guide sleeve 4 and extend into the cylinder barrel 2, so that the guide sleeve 4 can provide guide for the axial movement of the stroke shaft 3, the stroke shaft 3 is prevented from axially deflecting in the movement process, and the stability of the piston 1 in piston movement is improved. The inner surface of the guide sleeve 4 sealingly engages the outer surface of the stroke shaft 3 so that the interior of the cylinder 2 is sealed.

Optionally, a first seal 8 is provided between the inner surface of the guide sleeve 4 and the outer surface of the stroke shaft 3 to form a sealing fit. Further, the number of the first seal members 8 may be plural, and plural first seal members 8 are arranged in the axial direction of the stroke shaft 3.

A second seal 7 is provided between one end of the guide sleeve 4 and the cylinder 2 to form a sealing fit. The number of the second seal members 7 may be plural, and plural second seal members 7 are arranged in the axial direction of the stroke shaft 3.

It can be understood that, since the guide sleeve 4 is covered on the tail part of the cylinder 2, the limit part is abutted with the cylinder 2 through the guide sleeve 4 during the reciprocating motion of the piston 1.

In this embodiment, the limiting portion is a limiting sleeve 5, and the limiting sleeve 5 is sleeved on the outer surface of the stroke shaft 3. Thereby when

spacing sleeve

5 and 2 butts of cylinder, because spacing sleeve 5 forms the anchor ring contact along the circumference of cylinder 2, reduce the impact pressure between cylinder 2 and the spacing sleeve 5 for spacing sleeve 5 can be reliably connected with stroke axle 3, is difficult for because of assaulting too big connection failure that causes.

Optionally, the inner peripheral side wall of the end of the limiting sleeve 5 facing the guide sleeve 4 is provided with a radial avoiding portion to avoid spatial interference between the limiting sleeve 5 and the guide sleeve 4.

In the present embodiment, the outer peripheral side wall of the stroke shaft 3 is provided with an external thread portion, the inner peripheral side wall of the limit sleeve 5 is provided with an internal thread portion, and the limit sleeve 5 is screwed with the stroke shaft 3 through the external thread portion and the internal thread portion, that is, the limit sleeve 5 is screwed with the stroke shaft 3.

Specifically, the distance between the piston 1 and the limit sleeve 5 can be shortened by rotating the limit sleeve 5 toward the cylinder 2, so that the piston movement stroke of the piston 1 is reduced. The limiting sleeve 5 is rotated in the direction away from the cylinder barrel 2, so that the distance between the piston 1 and the limiting sleeve 5 can be prolonged, and the piston movement stroke of the piston 1 is increased.

The length of the external thread portion is greater than that of the internal thread portion, thereby providing a more sufficient adjustable space for the limit sleeve 5 in the axial direction of the stroke shaft 3.

Through setting up the external screw thread at stroke axle 3, set up the internal thread at stop sleeve 5, not only can simplify the swing joint structure, but also can guarantee the mounted position of stop sleeve 5 and set the back, stop sleeve 5 and stroke axle 3 are reliably connected.

Optionally, in order to reduce the wear between the stop sleeve 5 and the cylinder tube 2 too quickly due to frequent collisions, a reinforcement layer is provided at the end face of the stop sleeve 5 facing the cylinder tube 2. The reinforcing layer may be formed by a hard metal plating.

In the present embodiment, the outer contour of the radial cross section of the position-limiting sleeve 5 is polygonal, that is, a plurality of planes are formed on the outer peripheral wall of the position-limiting sleeve 5, so as to facilitate the auxiliary screwing of the tool.

Optionally, in order to further improve the convenience of screw adjustment, the outer circumferential side wall of the position limiting sleeve 5 is provided with anti-slip threads.

In the present embodiment, the other end of the stroke shaft 3 is provided with the head 6, the head 6 is used for connection with the driving device, and in order to improve the reliability and convenience of connection of the head 6 with the driving device, the head 6 is provided with a connection through hole.

The end face of the limiting sleeve 5 facing the rod head 6 is provided with a buffering component 9, and in the process of adjusting the stroke and the installation distance of the hydraulic oil cylinder, the rod head 6 is structurally connected with the limiting sleeve 5 through the buffering component 9, so that the limiting sleeve 5 is effectively prevented from being damaged due to direct collision with the rod head 6, and a buffering effect is achieved. Compared with the reinforcing layer, the process can be simplified, and the cost can be reduced.

In the alternative of this embodiment, the buffer member 9 is annular, the end surface of the limiting sleeve 5 facing the club head 6 is provided with an annular groove, an annular support is formed inside the annular groove, and the buffer member 9 is arranged in the annular groove and sleeved on the outer surface of the annular support. Through forming ring channel and annular support, support and compress tightly in the ring channel through locating the annular with buffer member 9 cover, can accomplish buffer member 9's installation, the dismouting of being convenient for is removable.

In order to improve the mounting firmness of the cushioning member 9, the cushioning member 9 may be bonded to both the annular groove and the annular support.

In the alternative of this embodiment, the buffering member 9 is a rubber pad, a silica gel pad, a composite rubber pad formed by a spring support and a rubber pad, or a composite silica gel pad formed by a spring support and a silica gel pad, so that the impact energy is absorbed by the elastic property of the buffering member 9 to achieve the buffering effect.

When the rubber pad or the silica gel pad is used independently, the length of the rubber pad and the length of the silica gel pad are not less than the length of the annular groove.

The compound rubber pad comprises two rubber pads and a spring support which is connected and supported between the two rubber pads, wherein one rubber pad is attached to the groove bottom of the annular groove, and the other rubber pad faces the rod head 6, so that the soft rubber pad is in contact with the rod head 6 and the limiting sleeve 5.

The compound silica gel pad includes two silica gel pads and connects and support the spring brace between two silica gel pads, and one of them silica gel pad is laminated with the tank bottom of ring channel, and another silica gel pad is towards pole head 6 to make soft silica gel pad and pole head 6 and spacing sleeve 5 contact.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention. Moreover, those skilled in the art will appreciate that while some embodiments herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, any of the claimed embodiments may be used in any combination. The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information constitutes prior art already known to a person skilled in the art.

Claims

1. A hydraulic oil cylinder is characterized by comprising a cylinder barrel, a piston, a stroke shaft and a limiting part;

2. The hydraulic oil cylinder as claimed in claim 1, wherein the limiting part is a limiting sleeve which is sleeved on the outer surface of the stroke shaft.

3. The hydraulic oil cylinder as claimed in claim 2, characterized in that the outer peripheral side wall of the stroke shaft is provided with an external thread part, the inner peripheral side wall of the limit sleeve is provided with an internal thread part, and the limit sleeve and the stroke shaft are in threaded connection through the external thread part and the internal thread part;

4. The hydraulic cylinder according to claim 2, characterized in that the outer contour of the radial section of the limit sleeve is polygonal.

5. The hydraulic oil cylinder as claimed in claim 2, wherein the other end of the stroke shaft is provided with a rod head, and the end surface of the limit sleeve facing the rod head is provided with a buffer component.

6. The hydraulic oil cylinder as claimed in claim 5, wherein the buffer member is annular, an annular groove is arranged on the end surface of the limiting sleeve facing the rod head, an annular support is formed inside the annular groove, and the buffer member is arranged in the annular groove and sleeved on the outer surface of the annular support.

7. The hydraulic ram according to claim 6, wherein the buffer member is a rubber pad, a silicone pad, a composite rubber pad formed by a spring support and a rubber pad, or a composite silicone pad formed by a spring support and a silicone pad.

8. The hydraulic oil cylinder as claimed in claim 1, further comprising a guide sleeve, wherein the guide sleeve covers the tail end of the cylinder barrel;