CN215719916U

CN215719916U - Oil cylinder structure capable of being connected in series

Info

Publication number: CN215719916U
Application number: CN202121738626.4U
Authority: CN
Inventors: 叶青云; 郑伟赞; 田丰; 王俊鑫; 吴良柱
Original assignee: Ningbo Ruyi JSCL
Current assignee: Ningbo Ruyi JSCL
Priority date: 2021-07-28
Filing date: 2021-07-28
Publication date: 2022-02-01
Anticipated expiration: 2031-07-28

Abstract

The utility model provides a series-connection oil cylinder structure, which belongs to the technical field of hydraulic oil cylinders and comprises a cylinder body, a piston rod and a piston head, wherein a first oil port and a second oil port are respectively arranged at the left end and the right end of the cylinder body, a three-section type stepped hole penetrates through the left end and the right end of the piston head, the three-section type stepped hole comprises a first inner hole, a second inner hole and a third inner hole, the first inner hole, the second inner hole and the third inner hole are sequentially arranged from left to right, the inner diameters of the first inner hole, the second inner hole and the third inner hole are sequentially increased, a stepped shaft is inserted into the first inner hole, the end part of the stepped shaft extends out of the first inner hole leftwards, a metal ball, a spring and a valve seat are sequentially arranged in the third inner hole from left to right, the metal ball seals the second inner hole under the action of the spring elasticity, and a guide sleeve matched with the piston rod is fixedly arranged at the left end of the cylinder body. The utility model has the advantage of simple structure.

Description

Oil cylinder structure capable of being connected in series

Technical Field

The utility model belongs to the technical field of hydraulic oil cylinders, and relates to an oil cylinder structure capable of being connected in series.

Background

In order to realize that one set of hydraulic station oil circuit controls synchronous work of a plurality of oil cylinders, the plurality of oil cylinders need to be supplemented with oil in time.

For example, a chinese patent with application number 202020770165.8 discloses a cylinder serial bidirectional oil supplementing mechanism, wherein an oil passing cavity communicated with a rod cavity is arranged at a cylinder bottom, a compensation oil passage is arranged on a piston, a first check valve and a second check valve are respectively arranged at two sides of the compensation oil passage, the first check valve is used for limiting oil in the compensation oil passage to flow into the oil passing cavity, the second check valve is used for limiting oil in the compensation oil passage to flow into the rod cavity, a first oil receiving port passing through the oil cavity directly is arranged on a first cylinder body, and a second oil receiving port of the rod cavity is connected with a first oil receiving port of the oil passing cavity of another independent cylinder through a pipeline, so as to realize the effect of synchronous motion of two cylinders in serial connection.

However, the oil supplementing mechanism needs to be provided with two one-way valves, the structure is relatively complex, and the oil cylinder is inconvenient to assemble.

Disclosure of Invention

The utility model aims to solve the problems in the prior art and provides a series-connected oil cylinder structure with a simple structure.

The purpose of the utility model can be realized by the following technical scheme: the utility model provides an oil cylinder structure that can establish ties, includes cylinder body, piston rod and piston head, and both ends are provided with first hydraulic fluid port, second hydraulic fluid port respectively about the cylinder body, and piston rod one end alternates into the cylinder body and installs the piston head with the cylinder body adaptation, and the piston head is separated about the cylinder body and is formed with pole chamber, rodless chamber, has the first hydraulic fluid port of pole chamber intercommunication, rodless chamber intercommunication second hydraulic fluid port, it is provided with the syllogic shoulder hole to run through about the piston head, and the syllogic shoulder hole includes from a left side to right side sets gradually and the internal diameter increases in proper order first hole, second hole, third hole, and first hole cartridge has the step shaft, and the step shaft tip stretches out first hole left, and step shaft head embedding second hole, and step shaft tip diameter is less than the internal diameter of first hole, and step shaft head diameter is greater than the internal diameter of first hole and is less than the internal diameter of second hole, and the third hole has set gradually from a left side to right side metal ball, Spring and disk seat, disk seat demountable installation are in third hole left end, and disk seat cavity sets up so that third hole intercommunication rodless chamber, and both ends support tight metal ball, disk seat respectively about the spring, and the second hole is sealed to the metal ball under spring force, the cylinder body left end is equipped with the guide pin bushing with the piston rod adaptation admittedly, and the right-hand member face of guide pin bushing is located first hydraulic fluid port right side, and when guide pin bushing right-hand member face and piston head butt, the guide pin bushing supports and connects the step shaft and jack-up metal ball in order to open the second hole for first hydraulic fluid port, second hydraulic fluid port intercommunication.

As a further improvement of the utility model, the right end of the guide sleeve is inwards recessed in the circumferential direction to form an annular groove, the left end of the annular groove extends to the left side of the first oil port, and the right end of the annular groove extends to the right end face of the guide sleeve.

As a further improvement of the utility model, the left end surface of the piston head is concavely provided with a guide groove along the periphery of the first inner hole, and the guide groove extends to the annular groove.

As a further improvement of the utility model, the cylinder body comprises a cylinder cover and a cylinder barrel, the left end of the guide sleeve is circumferentially provided with an annular step, the right end of the guide sleeve is embedded into the cylinder barrel, the annular step is abutted against the left end face of the cylinder barrel, the left end of the cylinder barrel is inserted into the cylinder cover and is in threaded connection with the cylinder cover, and the cylinder cover tightly presses the annular step and the cylinder barrel.

As a further improvement of the utility model, a set screw is radially inserted into the cylinder cover and abuts against the threaded part at the left end of the cylinder barrel.

As a further improvement of the utility model, a ball seat is arranged between the metal ball and the spring, an arc-shaped groove matched with the metal ball is arranged on the left side of the ball seat, a boss is arranged on the left side of the ball seat, and the spring is sleeved outside the boss and is abutted against the ball seat.

As a further improvement of the utility model, a positioning insertion hole for inserting the spring is arranged on the left side of the valve seat.

Based on the technical scheme, the embodiment of the utility model can at least produce the following technical effects:

1. when the piston head is separated from the guide sleeve, the metal ball seals the second inner hole, the rod cavity is isolated from the rodless cavity, the piston head can horizontally move left and right under the action of oil, when the piston head abuts against the guide sleeve, the metal ball is jacked open by the stepped shaft, the rod cavity is communicated with the rodless cavity, oil can be supplemented between the rodless cavity and the rodless cavity, and then the oil in each oil cylinder can be automatically adjusted in the reciprocating motion process of the series oil cylinder. Compared with the prior art, the automatic oil supplementing effect can be realized only by the check valve and the stepped shaft which are composed of the metal ball, the spring and the valve seat, the structure is simpler, and the production cost is lower.

2. The annular groove is formed in the right end of the guide sleeve, so that the first oil port is naturally communicated with the rod cavity, an oil way is prevented from being formed in the guide sleeve, and the processing and mounting difficulty of the guide sleeve is reduced.

3. The guide groove is formed in the left end face of the piston head, so that when the guide sleeve abuts against the piston head, the first oil port can be communicated with the second oil port all the time through the three-section type stepped hole, the piston head is prevented from shaking left and right when the oil of the serial oil cylinders is supplemented, and the synchronism of the serial oil cylinders is guaranteed.

Drawings

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

Fig. 2 is a partially enlarged view of a portion a in fig. 1.

Fig. 3 is a partially enlarged view at B in fig. 1.

In the figure, 100, cylinder; 110. a first oil port; 120. a second oil port; 130. a cylinder cover; 131. tightening the screw; 140. a cylinder barrel; 200. a piston rod; 300. a piston head; 310. a first inner bore; 320. a second inner bore; 330. a third inner bore; 340. a guide groove; 400. a stepped shaft; 500. a metal ball; 600. a ball seat; 700. a spring; 800. a valve seat; 900. a guide sleeve; 910. an annular groove; 920. an annular step.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

As shown in fig. 1 to 3, the oil cylinder structure capable of being connected in series includes a cylinder body 100, a piston rod 200 and a piston head 300, a first oil port 110 and a second oil port 120 are respectively disposed at the left end and the right end of the cylinder body 100, one end of the piston rod 200 is inserted into the cylinder body 100 and is provided with the piston head 300 adapted to the cylinder body 100, the piston head 300 divides the cylinder body 100 into a rod cavity and a rodless cavity at the left end and the right end, the rod cavity is communicated with the first oil port 110, the rodless cavity is communicated with the second oil port 120, a three-stage stepped hole is penetratingly disposed at the left and the right of the piston head 300, the three-stage stepped hole includes a first inner hole 310, a second inner hole 320 and a third inner hole 330 which are sequentially disposed from left to right and have sequentially increasing inner diameters, a stepped shaft 400 is inserted into the first inner hole 310, the end of the stepped shaft 400 extends out of the first inner hole 310 leftwards, the head of the stepped shaft 400 is embedded into the second inner hole 320, the diameter of the stepped shaft 400 is smaller than the inner diameter of the first inner hole 310 and smaller than the inner diameter of the second inner hole 320, the third inner hole 330 is sequentially provided with a metal ball 500, a spring 700 and a valve seat 800 from left to right, the valve seat 800 is detachably mounted at the left end of the third inner hole 330, the valve seat 800 is hollow so that the third inner hole 330 is communicated with the rodless cavity, the left end and the right end of the spring 700 are respectively abutted against the metal ball 500 and the valve seat 800, the metal ball 500 seals the second inner hole 320 under the elastic force of the spring 700, the left end of the cylinder body 100 is fixedly provided with a guide sleeve 900 matched with the piston rod 200, the right end face of the guide sleeve 900 is positioned at the right side of the first oil port 110, when the right end face of the guide sleeve 900 is abutted against the piston head 300, the guide sleeve 900 abuts against the stepped shaft 400 and jacks up the metal ball 500 so as to open the second inner hole 320, and the first oil port 110 and the second oil port 120 are communicated.

When the piston head 300 is separated from the guide sleeve 900, the metal ball 500 seals the second inner hole 320, the rod cavity is isolated from the rodless cavity, so that the piston head 300 can horizontally move left and right under the action of oil, when the piston head 300 abuts against the guide sleeve 900, the metal ball 500 is jacked open by the stepped shaft 400, the rod cavity is communicated with the rodless cavity, so that oil can be supplemented between the rodless cavity and the rodless cavity, and further, the oil in each oil cylinder can be automatically adjusted in the reciprocating motion process of the series oil cylinders. Compared with the prior art, the automatic oil supplementing effect can be realized only by the check valve consisting of the metal ball 500, the spring 700 and the valve seat 800 and the stepped shaft 400, the structure is simpler, and the production cost is lower.

Wherein, the guide sleeve 900 has a circular groove 910 formed inward in the right end, the left end of the circular groove 910 extends to the left side of the first oil port 110, and the right end extends to the right end face of the guide sleeve 900. The first oil port 110 is naturally communicated with the rod cavity, so that an oil path is prevented from being formed in the guide sleeve 900, and the processing and mounting difficulty of the guide sleeve 900 is reduced.

The left end face of the piston head 300 is recessed along the periphery of the first inner hole 310 to form a guide groove 340, and the guide groove 340 extends to the peripheral face of the piston head 300, so that when the guide sleeve 900 abuts against the piston head 300, the first oil port 110 can be always communicated with the second oil port 120 through the three-section stepped hole, and the piston head 300 is prevented from shaking left and right when the serial oil cylinders supplement oil, so that the synchronism of the serial oil cylinders is ensured.

In order to facilitate the installation of the guide sleeve 900, the cylinder body 100 comprises a cylinder cover 130 and a cylinder barrel 140, an annular step 920 is formed at the left end of the guide sleeve 900 in the circumferential direction, the right end of the guide sleeve 900 is embedded into the cylinder barrel 140, the annular step 920 abuts against the left end face of the cylinder barrel 140, the left end of the cylinder barrel 140 is inserted into the cylinder cover 130 and is in threaded connection with the cylinder cover 130, and the cylinder cover 130 compresses the annular step 920 and the cylinder barrel 140. Wherein, the cylinder cap 130 is radially inserted with a set screw 131, the set screw 131 abuts against the thread part at the left end of the cylinder barrel 140 to prevent the cylinder cap 130 from loosening, and the cylinder body 100 is more reliably mounted.

It is worth mentioning that a ball seat 600 is further arranged between the metal ball 500 and the spring 700, an arc-shaped groove matched with the metal ball 500 is formed in the left side of the ball seat 600, a boss is arranged on the left side of the ball seat 600, and the spring 700 is sleeved outside the boss and abutted against the ball seat 600.

Ball seat 600 can make metal ball 500, spring 700 atress more even, and metal ball 500 is difficult for rubbing with third hole 330 emergence, improves life.

In order to facilitate the positioning and installation of the spring 700, a positioning insertion hole for the spring 700 to be inserted is formed in the left side of the valve seat 800.

The specific embodiments described herein are merely illustrative of the spirit of the utility model. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the utility model as defined in the appended claims.

Claims

1. The utility model provides a hydro-cylinder structure that can establish ties, includes cylinder body, piston rod and piston head, and both ends are provided with first hydraulic fluid port, second hydraulic fluid port respectively about the cylinder body, and the cylinder body is gone into in piston rod one end interlude and the piston head of installing with the cylinder body adaptation, and the piston head is separated about with the cylinder body and is formed with pole chamber, no pole chamber, has the first hydraulic fluid port of pole chamber intercommunication, no pole chamber intercommunication second hydraulic fluid port, its characterized in that: the piston head is provided with a three-section stepped hole which penetrates through the left side and the right side of the piston head, the three-section stepped hole comprises a first inner hole, a second inner hole and a third inner hole which are sequentially arranged from left to right and have sequentially increased inner diameters, a stepped shaft is inserted in the first inner hole, the end part of the stepped shaft extends out of the first inner hole towards the left side, the head part of the stepped shaft is embedded in the second inner hole, the diameter of the end part of the stepped shaft is smaller than that of the first inner hole, the diameter of the head part of the stepped shaft is larger than that of the first inner hole and smaller than that of the second inner hole, the third inner hole is sequentially provided with a metal ball, a spring and a valve seat from left to right, the valve seat is detachably arranged at the left end of the third inner hole, the valve seat is arranged in a hollow mode so that the third inner hole is communicated with a rodless cavity, the left end and the right end of the spring respectively abut against the metal ball and the valve seat, the metal ball seals the second inner hole under the action of the spring, the left end of the cylinder body is fixedly provided with a guide sleeve matched with the piston rod, and the right end face of the guide sleeve is positioned at the first oil port, when the right end face of the guide sleeve is abutted to the piston head, the guide sleeve abuts to the stepped shaft and jacks up the metal ball to open the second inner hole, so that the first oil port and the second oil port are communicated.

2. The tandem cylinder structure of claim 1, wherein: the guide sleeve right-hand member circumference is inwards sunken to form the ring channel, and the ring channel left end extends to first hydraulic fluid port left side, and the right-hand member extends to the guide sleeve right-hand member face.

3. The tandem cylinder structure of claim 2, wherein: the left end face of the piston head is recessed along the periphery of the first inner hole to form a guide groove, and the guide groove extends to the peripheral face of the piston head.

4. The tandem cylinder structure of claim 1, wherein: the cylinder body includes cylinder cap and cylinder, and guide pin bushing left end circumference appearance is formed with annular step, and guide pin bushing right-hand member embedding cylinder and annular step offset with the cylinder left end face, and the cylinder left end inserts the cylinder cap and with the cylinder cap spiro union, and the cylinder cap compresses tightly annular step and cylinder.

5. The tandem cylinder structure of claim 4, wherein: and a set screw is radially inserted into the cylinder cover and abuts against the threaded part at the left end of the cylinder barrel.

6. The tandem cylinder structure of claim 1, wherein: still be provided with the ball seat between metal ball and the spring, the ball seat left side be equipped with the arc wall of metal ball adaptation, the ball seat left side is equipped with the boss, the spring housing locate outside the boss and with the ball seat butt.

7. The tandem cylinder structure of claim 1, wherein: and a positioning insertion hole for embedding the spring is formed in the left side of the valve seat.