CN210859646U - Oil pressure stick - Google Patents

Abstract

The utility model relates to an oil pressure stick, mainly wear to be equipped with a piston rod in the outer tube, and according to the preface group be equipped with one according to the preface on this piston rod and support seat and a piston, be equipped with a valve hole on this piston again, and wear to be equipped with a valve rod at this valve hole, therefore, valve piece jam in the valve hole of establishing on the valve rod, when being the closed valve state, make the piston rod only can one-way up tensile motion, and can't down displacement, in order to reach rigidity resistance to compression effect, break away from the jam to its valve hole of piston when the valve rod in addition, and when being the open valve state, can make the piston rod down displacement, in order to facilitate readjustment piston rod exposed length.

Description

Oil pressure stick

Technical Field

The present invention relates to a hydraulic rod, and more particularly to a hydraulic rod capable of adjusting the exposed length of a piston rod when opening a valve and achieving a rigid compression-resistant effect when closing a valve.

Background

The pneumatic rod, the oil pressure rod, the gas oil pressure rod and the like have buffering, positioning and other functions, have quite wide application range, and can be generally used for adjusting and positioning two objects which move relatively, such as height adjustment of tables and chairs and the like.

The pressure rod, oil pressure rod and gas oil pressure rod are used in table, and the outer pipe is filled with high pressure gas or hydraulic oil and has piston unit and regulating unit inside it. However, the existing pneumatic rod, hydraulic rod and pneumatic-hydraulic rod are used to find that when the actuating rod is pressed, the piston rod can be elastically extended to a preset length at one time, which causes inconvenience in use.

Therefore, the inventor of the present invention has been made in view of the above-mentioned shortcomings of the conventional pneumatic rod, hydraulic rod and pneumatic-hydraulic rod, and has studied the present invention with the aid of the manufacturing and design experience and knowledge in the related fields for many years.

SUMMERY OF THE UTILITY MODEL

The utility model relates to an oil pressure stick, its main objective is in order to provide one kind and can adjust the piston rod at will when opening the valve and expose the length, reach the oil pressure stick of rigidity resistance to compression effect when closing the valve in addition.

In order to achieve the above-mentioned object, the present inventors have studied a hydraulic bar comprising:

the outer pipe is provided with a pipe hole in the axial direction, the upper end of the pipe hole of the outer pipe is fixedly connected with a sleeve, the center of the sleeve is provided with a trepan boring, the lower end of the pipe hole of the outer pipe is fixedly provided with an end cover, and the pipe wall of the outer pipe is provided with a stop edge at a proper position;

a piston unit including a piston rod and a piston, the piston rod is inserted into the sleeve hole of the sleeve at the upper end of the outer tube, and the upper end of the piston rod is protruded out of the outer tube, the lower end of the piston rod is positioned in the tube hole of the outer tube, and a assemblage section is formed at the lower end of the piston rod, the upper and lower ends of the piston are respectively provided with a first piston disc and a second piston disc, and the first piston disc and the second piston disc are integrally connected by a shaft sleeve, and a sleeve hole is arranged at the center of the shaft sleeve, the sleeve hole is assembled with the lower end of the assemblage section of the piston rod, and a vacant section is defined among the first piston disc, the second piston disc and the shaft sleeve, at least one leakage-proof gasket is arranged in the vacant section, and the peripheral walls of the leakage-proof gasket and the second piston disc are contacted with the tube wall of the tube hole of the outer tube, and a gap is formed between the peripheral wall of the first piston disc and the tube wall of the tube hole of the, the second piston disc is provided with a plurality of through holes which are communicated with the vacant region, the first piston disc is provided with a valve hole which is communicated with the vacant region, the second piston disc is provided with an assembling hole corresponding to the valve hole, and the diameter of the valve hole is larger than that of the assembling hole;

an adjusting unit, the adjusting unit includes a supporting seat, the supporting seat has a through hole in the center, the through hole is assembled with the assembling section of the piston rod, the supporting seat is located above the piston, and a gap is formed between at least one side of the supporting seat and the pipe hole wall of the outer pipe, the assembling section of the piston rod is located between the supporting seat and the piston and is sleeved with an elastic member, the upper and lower ends of the elastic member are respectively supported on the supporting seat and the piston, the adjusting unit also has a valve rod, the valve rod is arranged in the valve hole and the assembling hole of the first piston disc and the second piston disc of the piston, and a valve block is formed between the upper and lower ends of the valve rod, and the valve block is selectively blocked in the valve hole of the first piston disc or separated from the valve hole.

The oil pressure rod as described above, wherein the valve rod of the adjusting unit is provided with at least one stop ring at the lower end thereof, and the stop ring is selectively positioned against the bottom surface or the top surface of the second piston disc of the piston.

The hydraulic rod as described above, wherein the end of the end cap located in the pipe hole of the outer pipe is provided with a groove at the center.

The hydraulic rod as described above, wherein the tube hole of the outer tube is filled with hydraulic oil between the stop edge thereof and the end cap.

Therefore, when the valve block arranged on the valve rod is blocked in the valve hole and is in a closed valve state, the piston rod can only be upwards stretched in one direction and cannot be downwards displaced, so that a rigid pressure-resistant effect is achieved, and in addition, when the valve rod is separated from the blockage of the valve hole of the piston and is in an open valve state, the piston rod can be downwards displaced, so that the exposed length of the piston rod can be readjusted.

Drawings

The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, the proportional sizes, and the like of the respective members in the drawings are merely schematic for helping the understanding of the present invention, and do not specifically limit the shapes, the proportional sizes, and the like of the respective members of the present invention. The skilled person in the art can, under the teaching of the present invention, choose various possible shapes and proportional dimensions to implement the invention according to the specific situation.

Fig. 1 is a perspective sectional view of the present invention;

fig. 2 is a partial exploded perspective view of the present invention;

fig. 3 is a sectional view showing the closed valve state of the present invention;

FIG. 4 is a diagram illustrating the use state of the valve closing state of the present invention;

fig. 5 is a sectional view showing an open valve state of the present invention;

FIG. 6 is a view showing the open state of the valve of the present invention;

fig. 7 is a diagram of the bottom-touching valve closing state of the present invention.

Description of reference numerals:

1 outer tube

11 pipe hole

12 sleeve

121 trepan boring

13 end cap

131 groove

14 stop edge

2 piston unit

21 piston rod

211 assembling section

22 piston

221 first piston disc

222 second piston disc

223 shaft sleeve

224 trepan boring

225 vacant interval

226 leakage-proof gasket

227 through hole

228 valve hole

229 assembling holes

3 adjusting unit

31 support seat

311 perforation

32 elastic member

33 valve stem

331 valve block

332 stop ring

Detailed Description

The details of the present invention can be more clearly understood with reference to the accompanying drawings and the description of the embodiments of the present invention. However, the specific embodiments of the present invention described herein are for the purpose of explanation only, and should not be construed as limiting the invention in any way. Given the teachings of the present invention, the skilled person can conceive of any possible variants based on the invention, which should all be considered as belonging to the scope of the invention.

In order to make the technical means and effects achieved by the present invention more completely and clearly disclosed, the following detailed description refers to the accompanying drawings and reference numerals:

first, please refer to fig. 1 to 3, which illustrate an oil pressure rod of the present invention, comprising:

an outer tube 1, a tube hole 11 is formed along the axial direction of the outer tube 1, a sleeve 12 is fixedly connected to the upper end of the tube hole 11 of the outer tube 1, a sleeve hole 121 is arranged in the center of the sleeve 12, an end cover 13 is fixedly arranged at the lower end of the tube hole 11 of the outer tube 1, a groove 131 is arranged in the center of one end, located in the tube hole 11 of the outer tube 1, of the end cover 13, a stop edge 14 is formed at the proper position of the middle section of the outer tube 1 on the tube wall of the outer tube 1, and hydraulic oil is filled between the stop edge 14 and the end cover 13 in the tube hole 11 of the outer tube 1;

a piston unit 2, please refer to fig. 4, comprising a piston rod 21 and a piston 22, wherein the piston rod 21 is inserted into the sleeve hole 121 of the sleeve 12 at the upper end of the outer tube 1, the upper end of the piston rod 21 is protruded out of the outer tube 1, the lower end of the piston rod 21 is located in the tube hole 11 of the outer tube 1, the lower end of the piston rod 21 forms an assembly section 211, the upper and lower ends of the piston 22 are respectively provided with a first piston disc 221 and a second piston disc 222, the first piston disc 221 and the second piston disc 222 are integrally connected by a sleeve 223, a sleeve hole 224 is provided at the center of the sleeve 223 to be assembled with the lower end of the assembly section 211 of the piston rod 21, a vacant section 225 is formed between the first piston disc 221, the second piston disc 222 and the sleeve 223, and at least one anti-leakage washer 226 is provided at the vacant section 225, the leakage-proof washer 226 and the second piston disc 222 are in contact with the tube wall of the tube hole 11 of the outer tube 1, a gap is formed between the first piston disc 221 and the tube wall of the tube hole 11 of the outer tube 1, the second piston disc 222 is provided with a plurality of through holes 227, the through holes 227 are communicated with the vacant region 225, the first piston disc 221 is provided with a valve hole 228, the valve hole 228 is communicated with the vacant region 225, the second piston disc 222 is provided with an assembling hole 229 corresponding to the valve hole 228, and the diameter of the valve hole 228 is larger than that of the assembling hole 229;

an adjusting unit 3, making the adjusting unit 3 include a supporting seat 31, the supporting seat 31 has a through hole 311 at the center to be assembled with the assembling section 211 of the piston rod 21, so that the supporting seat 31 is located above the piston 22, and at least one side of the supporting seat 31 forms a gap with the pipe wall of the pipe hole 11 of the outer pipe 1, and making the assembling section 211 of the piston rod 21 located between the supporting seat 31 and the piston 22 is sleeved with an elastic member 32, and making the upper and lower ends of the elastic member 32 respectively abut against the supporting seat 31 and the piston 22, and further having a valve rod 33, making the valve rod 33 penetrate through the valve hole 228 and the assembling hole 229 of the first piston disc 221 and the second piston disc 222 of the piston 22, and making the valve rod 33 form a valve block 331 between the upper and lower ends thereof, and making the valve block 331 selectively block the valve hole 228 of the first piston disc 221 or separate from the valve hole 228 of the first piston disc 221, at least one stop ring 332 is also provided at the lower end of the valve stem 33, and the stop ring 332 is selectively positioned against the bottom or top surface of the second piston disc 222.

Accordingly, when the hydraulic rod of the present invention is used, the upper end of the piston rod 21 of the hydraulic rod is assembled on a table, and the end cap 13 at the lower end of the outer tube 1 is assembled on a table, so that the valve block 331 of the valve rod 33 of the adjusting unit 3 remains blocked in the valve hole 228 of the first piston disc 221 of the piston 22 at ordinary times to be in a closed state. Here, when the user applies a force to lift the table plate upward, the piston rod 21 is driven to extend upward, and at this time, referring to fig. 4, the hydraulic oil located above the supporting seat 31 is pressed downward, flows to the piston 22 from the gap between the two sides of the supporting seat 31 and the pipe wall of the pipe hole 11 of the outer pipe 1, flows to the empty space 225 of the piston 22 from the gap between the first piston disc 221 of the piston 22 and the pipe wall of the pipe hole 11 of the outer pipe 1, and flows to the lower side of the piston 22 through the through hole 227 of the second piston disc 222 of the piston 22, so that the piston rod 21 can freely move to adjust its extension length.

Furthermore, when the piston rod 21 is adjusted to a desired length, the stretching of the piston rod 21 is stopped, and when a user uses a table assembled with the piston rod 21 to perform a document operation and the like to generate a pressing force on the table and the piston rod 21, the valve hole 228 of the first piston disc 221 of the piston 22 is blocked by the valve block 331 of the valve rod 33, and when the piston 22 is about to move downward, the hydraulic oil below the piston 22 is pressed upward, and the anti-leakage gasket 226 of the piston 22 is pressed upward to the bottom surface of the first piston disc 221, so as to close the gap between the first piston disc 221 and the pipe wall of the pipe hole 11 of the outer pipe 1, and thus, the flow of the hydraulic oil can be completely blocked, so that the piston rod 21 can be stretched upward in a single direction only in a valve closing state, and cannot move downward, and a rigid pressure-resisting effect can be achieved.

In addition, when the user applies force to continuously extend the piston rod 21 upward, please refer to fig. 5, and the upper end of the supporting seat 31 assembled on the piston rod 21 touches the stopping edge 14 arranged on the tube wall of the outer tube 1, the supporting seat 31 is stopped and positioned by the stopping edge 14, as the piston rod 21 continuously extends upward, the upper end of the valve rod 33 assembled on the piston 22 touches the lower end of the supporting seat 31, and the valve rod 33 is pushed downward, at this time, please refer to fig. 6, the valve block 331 of the valve rod 33 will be separated from the blockage of the valve hole 228 on the first piston disc 221 of the piston 22, and a valve opening state is formed, and the stopping ring 332 assembled on the lower end of the valve rod 33 is also abutted to the bottom surface of the second piston disc 222 for positioning, so as to fix the valve opening state, so that the valve rod 33 will not be displaced when receiving the acting force, and the incomplete valve opening and closing state is avoided.

Then, the user can apply a force to push the piston rod 21 downward, at this time, the hydraulic oil located below the piston 22 is pressed upward, and flows from the through hole 227 of the second piston disc 222 to the vacant region 225 of the piston 22, then flows to the supporting seat 31 along the valve hole 228, and flows to the upper side of the supporting seat 31 through the gap between the two sides of the supporting seat 31 and the pipe wall of the pipe hole 11 of the outer pipe 1, and thus the piston rod 21 is slowly lowered and restored, please refer to fig. 7, when the lower end of the piston rod 21 is lowered to the central groove 131 of the end cover 13 of the outer pipe 1, the lower end of the valve rod 33 touches the end surface of the end cover 13, and the receiving end cover 13 is pushed and restored, so that the valve block 331 of the valve rod 33 is plugged in the valve hole 228 of the first piston disc 221 again, and the stop ring 332 of the valve rod 33 is also abutted against the top surface of the second piston disc 222 to fix the closed valve state, for the user to readjust the exposed length of the piston rod 21.

With the above structure and the embodiment, the present invention has the following advantages:

1. the utility model discloses an oil pressure stick makes the valve hole of valve rod jam piston when the valve state that closes to block the flow path of hydraulic oil, here, so that the piston rod only can one-way up-draw actuate, and unable displacement down, in order to reach rigidity resistance to compression effect.

2. The utility model discloses a hydraulic pressure stick can make the valve rod break away from the jam to its valve hole of piston when opening the valve state, and makes hydraulic oil can follow the valve hole and flow, borrows this, can make the piston rod can down the displacement to the exerted length of readjustment piston rod.

3. The utility model discloses an oil pressure stick when opening, closing the valve, makes the backstop ring that establishes on the valve rod support respectively and locates the top surface and the bottom surface location of second piston dish to make the valve rod not be pushed improper production displacement by hydraulic oil, in order to ensure the stability of opening, closing the valve, avoid taking place to open, the incomplete situation of closing the valve.

In the following description of the embodiments, the invention is described in detail, but the description is not to be construed as limiting the invention for any reason, and in particular, the features described in the different embodiments may be combined with each other as desired, thereby forming other embodiments, and the features are understood to be applicable to any one embodiment and not limited to the described embodiments unless explicitly described to the contrary.

Claims (4)

1. An oil pressure bar, comprising:

the outer pipe is provided with a pipe hole in the axial direction, the upper end of the pipe hole of the outer pipe is fixedly connected with a sleeve, the center of the sleeve is provided with a trepan boring, the lower end of the pipe hole of the outer pipe is fixedly provided with an end cover, and the pipe wall of the outer pipe is provided with a stop edge at a proper position;

a piston unit including a piston rod and a piston, the piston rod is inserted into the sleeve hole of the sleeve at the upper end of the outer tube and the upper end of the piston rod is exposed outside the outer tube, the lower end of the piston rod is positioned in the tube hole of the outer tube, an assembling section is formed at the lower end of the piston rod, the upper and lower ends of the piston are respectively provided with a first piston disc and a second piston disc, the first piston disc and the second piston disc are integrally connected by a shaft sleeve, the center of the shaft sleeve is provided with a sleeve hole, the sleeve hole and the lower end of the assembling section of the piston rod are sleeved and assembled, a vacant section is defined among the first piston disc, the second piston disc and the shaft sleeve, at least one leakage-proof gasket is arranged in the vacant section, the peripheral walls of the leakage-proof gasket and the second piston disc are contacted with the tube wall of the tube hole of the outer tube, and a gap is formed between the peripheral wall of the first piston disc and the tube wall of the tube hole of the outer tube, the second piston disc is provided with a plurality of through holes which are communicated with the vacant region, the first piston disc is provided with a valve hole which is communicated with the vacant region, the second piston disc is provided with an assembling hole corresponding to the valve hole, and the diameter of the valve hole is larger than that of the assembling hole;

an adjusting unit, the adjusting unit includes a supporting seat, the supporting seat has a through hole in the center, the through hole is assembled with the assembling section of the piston rod, the supporting seat is located above the piston, and a gap is formed between at least one side of the supporting seat and the pipe wall of the pipe hole of the outer pipe, the assembling section of the piston rod is located between the supporting seat and the piston and is sleeved with an elastic member, and the upper and lower ends of the elastic member are respectively supported on the supporting seat and the piston, the adjusting unit also has a valve rod, the valve rod is arranged in the valve hole and the assembling hole of the first piston disc and the second piston disc of the piston, a valve block is formed between the upper and lower ends of the valve rod, and the valve block is selectively blocked in the valve hole of the first piston disc or separated from the valve hole.

2. A hydraulic ram according to claim 1 wherein the valve stem of the adjustment unit is provided at its lower end with at least one stop ring which is selectively positionable against the bottom or top surface of the second disc of the piston.

3. A hydraulic rod as claimed in claim 1, wherein the end of the end cap located in the bore of the outer tube is centrally provided with a recess.

4. The hydraulic rod of claim 1, wherein the tube holes of the outer tube are filled with hydraulic oil between the stop edges thereof and the end caps.

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