阅读说明：本技术 可变行程的简式节能液压缸 (Simple energy-saving hydraulic cylinder with variable stroke ) 是由 刘艳雄 田林林 华林 徐志成 赵新浩 于 2019-09-27 设计创作，主要内容包括：本发明公开了一种可变行程的简式节能液压缸,包括缸体、活塞杆和活塞,缸体上设有内腔以及与内腔连通的液压油路,活塞杆密封伸入内腔,活塞设在活塞杆上且与内腔滑动配合；缸体包括上缸体、中间筒和下缸体,上缸体与中间筒的一端通过螺纹连接套在一起,下缸体与中间筒的另一端通过螺纹连接套在一起,上缸体、中间筒和下缸体合围成内腔,上缸体和下缸体通过拉杆和拉杆上的螺母拉紧固定。该液压缸可以调整液压缸的行程,简单结构,操作方便,实现了节能减排,提高了通用性,降低了加工成本。(The invention discloses a simple energy-saving hydraulic cylinder with a variable stroke, which comprises a cylinder body, a piston rod and a piston, wherein the cylinder body is provided with an inner cavity and a hydraulic oil way communicated with the inner cavity; the cylinder body comprises an upper cylinder body, a middle cylinder and a lower cylinder body, wherein the upper cylinder body is sleeved with one end of the middle cylinder through threaded connection, the lower cylinder body is sleeved with the other end of the middle cylinder through threaded connection, the upper cylinder body, the middle cylinder and the lower cylinder body surround to form an inner cavity, and the upper cylinder body and the lower cylinder body are tightened and fixed through a pull rod and a nut on the pull rod. The hydraulic cylinder can adjust the stroke of the hydraulic cylinder, has a simple structure, is convenient to operate, realizes energy conservation and emission reduction, improves the universality and reduces the processing cost.)

1. The utility model provides an energy-conserving pneumatic cylinder of simple of variable stroke, includes cylinder body, piston rod and piston, is equipped with the inner chamber on the cylinder body and with the hydraulic pressure oil circuit of inner chamber intercommunication, the piston rod seals and stretches into the inner chamber, the piston establish on the piston rod and with inner chamber sliding fit, its characterized in that: the cylinder body comprises an upper cylinder body, a middle cylinder and a lower cylinder body, wherein the upper cylinder body is sleeved with one end of the middle cylinder through threaded connection, the lower cylinder body is sleeved with the other end of the middle cylinder through threaded connection, the upper cylinder body, the middle cylinder and the lower cylinder body surround to form an inner cavity, and the upper cylinder body and the lower cylinder body are tightened and fixed through a pull rod and a nut on the pull rod.

2. The variable stroke simple energy saving hydraulic cylinder as claimed in claim 1, wherein: the upper cylinder body is connected with the middle cylinder through transmission threads, and the lower cylinder body is connected with the middle cylinder through transmission threads.

3. A simple energy-saving hydraulic cylinder with variable stroke according to claim 1 or 2, characterized in that: the internal thread of the upper cylinder body is matched with the external thread of the middle cylinder, and the internal thread of the lower cylinder body is matched with the external thread of the middle cylinder.

4. The variable stroke simple energy saving hydraulic cylinder as claimed in claim 1, wherein: the pull rods are distributed on four corners of the upper cylinder body and the lower cylinder body.

5. The variable stroke simple energy saving hydraulic cylinder as claimed in claim 1, wherein: the upper opening of the upper cylinder body is provided with a positioning sleeve, the lower part of the positioning sleeve is clamped on the upper cylinder body, the upper part of the positioning sleeve is pressed by an end cover, the end cover is fixed on the upper cylinder body through a bolt, the inner side of the positioning sleeve is provided with a dustproof sealing ring, and the piston rod extends into the inner cavity through the dustproof sealing ring in a sealing way.

6. The variable stroke simple energy saving hydraulic cylinder as claimed in claim 1, wherein: the piston rod is provided with a step surface at one end positioned in the inner cavity, the piston is sleeved on the piston rod, one end of the piston is limited by the step surface, the other end of the piston is limited by a piston locking nut, and the piston locking nut is sleeved on the piston rod in a matched mode.

7. The variable stroke simple energy saving hydraulic cylinder as claimed in claim 1, wherein: and a piston sealing ring and a guide ring which are matched with the inner cavity are arranged on the excircle of the piston, and the guide ring is positioned between the piston sealing rings.

8. The variable stroke simple energy saving hydraulic cylinder as claimed in claim 1, wherein: the hydraulic oil circuit comprises an oil inlet and an oil outlet and a buffer throttle port which are arranged on the upper cylinder body and the lower cylinder body.

Technical Field

The invention belongs to the field of hydraulic cylinders, and particularly relates to a simple energy-saving hydraulic cylinder with a variable stroke.

Background

At present, the stroke of pneumatic cylinder is generally unchangeable, when the pneumatic cylinder of fixed stroke was used to the press, can only process partly part, to the part that needs the processing of bigger stroke, the pneumatic cylinder of bigger stroke can only be changed, not only consuming time but also the cost is improved, to the part that needs the processing of less stroke (e.g., sheet metal component), can have unnecessary stroke, the oil liquid of unnecessary stroke part can consume a large amount of heat energy and kinetic energy, lead to processing whole power consumption and increase, consequently, the pneumatic cylinder of fixed stroke has the text problem of not energy-conserving, although there are some stroke pneumatic cylinders that can change at present, but all the structure is complicated, with high costs.

Disclosure of Invention

The invention aims to provide a simple energy-saving hydraulic cylinder with a variable stroke, which can adjust the stroke of the hydraulic cylinder, has a simple structure, is convenient to operate, realizes energy conservation and emission reduction, improves the universality and reduces the processing cost.

The technical scheme adopted by the invention is as follows:

the utility model provides an energy-conserving pneumatic cylinder of simple of variable stroke, includes cylinder body, piston rod and piston, is equipped with the inner chamber on the cylinder body and with the hydraulic pressure oil circuit of inner chamber intercommunication, the piston rod seals and stretches into the inner chamber, the piston establish on the piston rod and with inner chamber sliding fit, its characterized in that: the cylinder body comprises an upper cylinder body, a middle cylinder and a lower cylinder body, wherein the upper cylinder body is sleeved with one end of the middle cylinder through threaded connection, the lower cylinder body is sleeved with the other end of the middle cylinder through threaded connection, the upper cylinder body, the middle cylinder and the lower cylinder body surround to form an inner cavity, and the upper cylinder body and the lower cylinder body are tightened and fixed through a pull rod and a nut on the pull rod.

Furthermore, the upper cylinder body is connected with the middle cylinder through a transmission thread, and the lower cylinder body is connected with the middle cylinder through a transmission thread.

Further, the internal thread of the upper cylinder body is matched with the external thread of the middle cylinder, and the internal thread of the lower cylinder body is matched with the external thread of the middle cylinder.

Further, the pull rods are distributed at four corners of the upper cylinder body and the lower cylinder body.

Furthermore, a positioning sleeve is arranged at an upper opening of the upper cylinder body, the lower part of the positioning sleeve is clamped on the upper cylinder body, the upper part of the positioning sleeve is pressed by an end cover, the end cover is fixed on the upper cylinder body through a bolt, a dustproof sealing ring is arranged on the inner side of the positioning sleeve, and the piston rod extends into the inner cavity through the dustproof sealing ring in a sealing manner.

Furthermore, a step surface is arranged at one end of the piston rod, which is positioned in the inner cavity, the piston is sleeved on the piston rod, one end of the piston is limited by the step surface, the other end of the piston is limited by a piston locking nut, and the piston locking nut is sleeved on the piston rod in a matched manner.

Furthermore, a piston sealing ring and a guide ring which are matched with the inner cavity are arranged on the excircle of the piston, and the guide ring is positioned between the piston sealing rings.

Furthermore, the hydraulic oil circuit comprises an oil inlet and an oil outlet and a buffering throttle opening which are arranged on the upper cylinder body and the lower cylinder body.

The invention has the beneficial effects that:

the inner cavity of the hydraulic cylinder is formed by encircling an upper cylinder body, an intermediate cylinder and a lower cylinder body, the intermediate cylinder is respectively sleeved with the upper cylinder body and the lower cylinder body through threads, therefore, the stroke of the hydraulic cylinder, namely the length of the inner cavity, can be changed by adjusting the position of the intermediate cylinder with the upper cylinder body and the position of the lower cylinder body through threads, after adjustment, the upper cylinder body and the lower cylinder body are tensioned and fixed through a pull rod and a nut to fix the stroke, the stroke of the hydraulic cylinder is changed through simple structure and convenient operation to achieve the effects of energy conservation and emission reduction, and the hydraulic cylinder can be used as an executing mechanism of an industrial machine tool.

Drawings

FIG. 1 is a structural schematic of an embodiment of the present invention.

Fig. 2 is a perspective view of an embodiment of the present invention.

Fig. 3 is a schematic structural view of an upper portion of a hydraulic cylinder in an embodiment of the present invention.

Fig. 4 is a schematic structural view of the lower part of the hydraulic cylinder in the embodiment of the invention.

In the figure: 1-upper cylinder body; 2-an intermediate cylinder; 3-a pull rod; 4-a nut; 5-a piston rod; 6-end cover; 7-lower cylinder body; 8-bolt; 9-dustproof sealing ring; 10-a positioning sleeve; 11-piston seal ring; 12-a piston; 13-piston lock nut; 14-guide ring.

Detailed Description

The invention is further described below with reference to the figures and examples.

As shown in fig. 1 to 4, a simple energy-saving hydraulic cylinder with variable stroke comprises a cylinder body, a piston rod 5 and a piston 12, wherein the cylinder body is provided with an inner cavity and a hydraulic oil path communicated with the inner cavity, the piston rod 5 hermetically extends into the inner cavity, and the piston 12 is arranged on the piston rod 5 and is in sliding fit with the inner cavity, and the simple energy-saving hydraulic cylinder is characterized in that: the cylinder body includes cylinder body 1, middle section of thick bamboo 2 and lower cylinder body 7, goes up cylinder body 1 and the one end of middle section of thick bamboo 2 and passes through threaded connection cover together, and lower cylinder body 7 passes through the threaded connection cover together with the other end of middle section of thick bamboo 2, goes up cylinder body 1, middle section of thick bamboo 2 and lower cylinder body 7 and encloses into the inner chamber, goes up cylinder body 1 and lower cylinder body 7 and passes through pull rod 3 and the nut 4 on the pull rod 3 is taut fixed. The inner cavity of the hydraulic cylinder is formed by encircling an upper cylinder body 1, a middle cylinder 2 and a lower cylinder body 7, the middle cylinder 2 is respectively sleeved with the upper cylinder body 1 and the lower cylinder body 7 through threaded connection, therefore, the stroke of the hydraulic cylinder, namely the length of the inner cavity, can be changed by adjusting the positions of the middle cylinder 2 and the upper cylinder body 1 and the lower cylinder body 7 respectively through threads, after adjustment, the upper cylinder body 1 and the lower cylinder body 7 are tensioned and fixed through a pull rod 3 and a nut 4 to be fixed with the stroke, the stroke of the hydraulic cylinder is changed through simple structure and convenient operation, the effect of energy conservation and emission reduction is achieved by changing the stroke of the hydraulic cylinder, the hydraulic cylinder serves as an actuating mechanism of an industrial machine tool, one machine tool can process more kinds of parts, the universality of the machine tool is greatly improved, and the processing cost can be reduced to.

In this embodiment, the upper cylinder body 1 is connected with the middle cylinder 2 through transmission threads, and the lower cylinder body 7 is connected with the middle cylinder 2 through transmission threads, so that the stroke adjustment operation is more convenient.

As shown in fig. 1, 3 and 4, in the present embodiment, the internal thread of the upper cylinder 1 is fitted with the external thread of the intermediate cylinder 2, and the internal thread of the lower cylinder 7 is fitted with the external thread of the intermediate cylinder 2.

As shown in fig. 2, in the present embodiment, the pull rods 3 are distributed at four corners of the upper cylinder 1 and the lower cylinder 7, so that the tensioning effect is better.

As shown in fig. 1 and fig. 3, in this embodiment, a positioning sleeve 10 is disposed at an upper opening of an upper cylinder body 1, a lower portion of the positioning sleeve 10 is clamped on the upper cylinder body 1, an upper portion of the positioning sleeve 10 is pressed by an end cover 6, the end cover 6 is fixed on the upper cylinder body 1 through a bolt 8, a dustproof sealing ring 9 is disposed on an inner side of the positioning sleeve 10, and a piston rod 5 extends into an inner cavity through the dustproof sealing ring 9 in a sealing manner, so that the sealing effect is good.

As shown in fig. 1 and 4, in this embodiment, one end of the piston rod 5 located in the inner cavity is provided with a step surface, the piston 12 is sleeved on the piston rod 5, one end of the piston is limited by the step surface, the other end of the piston is limited by the piston lock nut 13, and the piston lock nut 13 is sleeved on the piston rod 5 in a matching manner.

As shown in fig. 1 and 4, in the present embodiment, a piston seal ring 11 and a guide ring 14 are disposed on the outer circumference of the piston 12 to match the inner cavity, and the guide ring 14 is disposed between the piston seal rings 11.

As shown in fig. 1, 3 and 4, in the present embodiment, the hydraulic oil path includes an oil inlet and an oil outlet and a buffering throttle opening formed on the upper cylinder 1 and the lower cylinder 7, and hydraulic oil is introduced into or removed from the oil inlet and the oil outlet to push the piston 12 to move up and down, so as to drive the piston rod 5 to move up and down.

It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.