CN212155313U - Damping oil cylinder for coal bed gas drilling machine - Google Patents
Damping oil cylinder for coal bed gas drilling machine Download PDFInfo
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- CN212155313U CN212155313U CN202020458030.8U CN202020458030U CN212155313U CN 212155313 U CN212155313 U CN 212155313U CN 202020458030 U CN202020458030 U CN 202020458030U CN 212155313 U CN212155313 U CN 212155313U
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- cylinder barrel
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Abstract
The utility model relates to a shock-absorbing oil cylinder for coal bed gas rig. The device comprises a cylinder barrel and a cylinder cover, wherein a piston rod is inserted on the cylinder cover in a sliding manner, one end of the piston rod is positioned outside the cylinder barrel, the other end of the piston rod extends into the cylinder barrel and is connected with a piston, an annular groove is formed in the end face of the free end of the piston rod positioned in the cylinder barrel, a bearing is inserted in the annular groove, a first lead screw nut is inserted in the inner ring of the bearing, the outer ring of the bearing is matched and connected with the annular groove, a lead screw is inserted in the first lead screw nut, a rotary damper is arranged on the bottom surface of the cylinder barrel opposite to the lead screw and is fixed in the cylinder barrel through a positioning shaft, and a second lead screw nut is inserted in the rotary damper. Has strong practicability.
Description
Technical Field
The utility model belongs to the technical field of the hydro-cylinder, especially, relate to a shock-absorbing cylinder for coal bed gas rig.
Background
The patent with the name of a precision oil cylinder is disclosed in the existing Chinese patent database, the application number is CN201720760423.2, the application date is 20170628, the publication number is CN206958021U and the publication date is 20180202, and the patent comprises an oil cylinder body and a servo adjusting mechanism. Its servo adjustment mechanism includes servo motor, controller and the ball screw pair of being connected with it, sliding sleeve, and servo motor output and lead screw fixed connection, ball nut and sliding sleeve fixed connection, sliding sleeve can be along axial motion along with ball nut, and there is the through-hole at the bottom of the jar of hydro-cylinder, has the sealing washer between through-hole inner wall and the sliding sleeve, has displacement sensor between the bottom of the jar and the piston rod, and the business turn over hydraulic fluid port of hydro-cylinder all has the solenoid valve, and its weak point lies in: when the oil cylinder works, the problem of large shaking exists when a piston rod and a piston in the oil cylinder reach extreme positions, and the piston rod is easy to break.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is that there is the great problem of rocking in current hydro-cylinder, causes the piston rod fracture easily, in order to improve its weak point, the utility model provides a damping cylinder for coal bed gas rig.
In order to achieve the purpose, the utility model is realized by the following technical proposal:
the utility model provides a shock attenuation hydro-cylinder for coal bed gas drilling machine, is including the cylinder and install the cylinder cap at the cylinder opening part, it has the piston rod to slide to peg graft on the cylinder cap, piston rod one end is located outside the cylinder, and the other end extends to in the cylinder and is connected with the piston, and the piston rod free end terminal surface that is located in the cylinder is seted up with the coaxial annular groove of piston rod, and the interpolation of annular groove has the bearing, the bearing inner circle is pegged graft and is had first screw nut, and the outer lane is connected with the annular groove cooperation, the interpolation of first screw nut has the lead screw, just is provided with the rotary damper coaxial with the lead screw to the cylinder bottom surface of lead screw, and rotary damper fixes in the cylinder through the location axle, the interpolation of rotary.
The utility model discloses the during operation, when the piston rod moves to the cylinder bottom, the piston rod drives first lead screw nut and the lead screw in the annular groove and moves towards the cylinder bottom, when the lead screw one end of cylinder bottom moves to rotary damper's second lead screw nut department, the lead screw is linear motion thereupon the piston rod this moment, it is rotatory to drive second lead screw nut, second lead screw nut is connected with rotary damper, thereby can make rotary damper produce the damping, make the linear motion speed of lead screw reduce, the movement speed that drives the piston rod reduces, play the absorbing effect of buffering.
Compared with the prior art, the beneficial effects of the utility model are that: this device utilizes lead screw drive's principle through rotary damper for the piston rod can obtain the buffering shock attenuation when moving the cylinder bottom, has protected the piston rod to a certain extent, avoids piston rod and cylinder hard contact, has improved the life of piston rod, and the device is applicable to industrial production, has very strong practicality.
The piston is characterized in that limiting grooves are formed in two end faces of the piston, threads are arranged on the piston rod located in the piston limiting grooves, locking nuts are screwed on the threads, and the piston is fixed on the piston rod through the two locking nuts.
A sealing groove is formed in the inner wall of the cylinder cover, and an oil blocking sealing ring is arranged in the sealing groove.
The free end of the piston rod positioned outside the cylinder is connected with an earring.
An oil outlet communicated with the cylinder barrel is formed in the cylinder barrel positioned at the opening of the cylinder barrel, and an oil inlet communicated with the cylinder barrel is formed in the cylinder barrel positioned at the bottom of the cylinder barrel.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a partially enlarged view of a portion a in fig. 1.
In the figure: the oil cylinder comprises a cylinder barrel 1, a cylinder cover 2, a piston rod 3, a piston 4, an annular groove 5, a bearing 6, a first lead screw nut 7, a lead screw 8, a rotary damper 9, a positioning shaft 10, a second lead screw nut 11, an oil blocking sealing ring 12, an earring 13, an oil outlet 14, an oil inlet 15, a limiting groove 16 and a locking nut 17.
Detailed Description
The technical solution of the present application will be further described and explained with reference to the accompanying drawings and embodiments.
As shown in fig. 1-2, the damping cylinder for the coal bed methane drilling machine comprises a cylinder barrel 1 and a cylinder cover 2 installed at an opening of the cylinder barrel 1, a piston rod 3 is inserted and slid on the cylinder cover 2, one end of the piston rod 3 is located outside the cylinder barrel 1, the other end of the piston rod extends into the cylinder barrel 1 and is connected with a piston 4, an annular groove 5 coaxial with the piston rod 3 is formed in the end face of the free end of the piston rod 3 located in the cylinder barrel 1, a bearing 6 is inserted in the annular groove 5, a first lead screw nut 7 is inserted in the inner ring of the bearing 6, the outer ring is connected with the annular groove 5 in a matching manner, a lead screw 8 is inserted in the first lead screw nut 7, a rotary damper 9 coaxial with the lead screw 8 is arranged on the bottom surface of the cylinder barrel 1 opposite to the lead screw 8, the rotary damper 9 is fixed in the cylinder barrel. Limiting grooves 16 are formed in two end faces of the piston 4, threads are arranged on the piston rod 3 located in the limiting grooves 16 of the piston 4, locking nuts 17 are screwed on the threads, and the piston 4 is fixed on the piston rod 3 through the two locking nuts 17. A sealing groove is formed in the inner wall of the cylinder cover 2, and an oil blocking sealing ring 12 is arranged in the sealing groove. The free end of the piston rod 3 located outside the cylinder 1 is connected with an ear ring 13. An oil outlet 14 communicated with the cylinder barrel 1 is formed in the cylinder barrel 1 positioned at the opening of the cylinder barrel 1, and an oil inlet 15 communicated with the cylinder barrel 1 is formed in the cylinder barrel 1 positioned at the bottom of the cylinder barrel 1.
During operation, when the piston rod 3 moves to cylinder 1 bottom, the piston rod 3 drives first lead screw nut 7 and lead screw 8 in the annular groove 5 and moves towards cylinder 1 bottom, when 8 one end of lead screw towards cylinder 1 bottom moves to second lead screw nut 11 department of rotary damper 9, lead screw 8 is linear motion thereupon this moment, it is rotatory to drive second lead screw nut 11, second lead screw nut 11 is connected with rotary damper 9, thereby can make rotary damper 9 produce the damping, make the linear motion speed of lead screw 8 reduce, the moving speed that drives piston rod 3 reduces, play the absorbing effect of buffering.
The present invention is not limited to the above embodiments, and based on the technical solutions disclosed in the present invention, those skilled in the art can make some replacements and transformations for some technical features without creative labor according to the disclosed technical contents, and these replacements and transformations are all within the protection scope of the present invention.
Claims (5)
1. The utility model provides a shock-absorbing oil cylinder for coal bed gas rig, is including the cylinder and install the cylinder cap at the cylinder opening part, it has the piston rod to slide to peg graft on the cylinder cap, piston rod one end is located outside the cylinder, and the other end extends to in the cylinder and is connected with piston, its characterized in that: the end face of the free end of the piston rod, which is positioned in the cylinder barrel, is provided with an annular groove which is coaxial with the piston rod, a bearing is inserted in the annular groove, the inner ring of the bearing is inserted with a first lead screw nut, the outer ring of the bearing is connected with the annular groove in a matching manner, a lead screw is inserted in the first lead screw nut, a rotary damper which is coaxial with the lead screw is arranged on the bottom surface of the cylinder barrel, which is opposite to the lead screw, the rotary damper is fixed in the cylinder barrel through a positioning shaft, and a second lead screw nut which is matched.
2. The damping cylinder for the coal bed methane drilling machine according to claim 1, characterized in that: the piston is characterized in that limiting grooves are formed in two end faces of the piston, threads are arranged on the piston rod located in the piston limiting grooves, locking nuts are screwed on the threads, and the piston is fixed on the piston rod through the two locking nuts.
3. The damping cylinder for the coal bed methane drilling machine according to claim 2, characterized in that: a sealing groove is formed in the inner wall of the cylinder cover, and an oil blocking sealing ring is arranged in the sealing groove.
4. The damping cylinder for the coal bed methane drilling machine according to claim 3, characterized in that: the free end of the piston rod positioned outside the cylinder is connected with an earring.
5. The shock absorbing cylinder for the coal bed methane drilling machine according to any one of claims 1 to 4, wherein: an oil outlet communicated with the cylinder barrel is formed in the cylinder barrel positioned at the opening of the cylinder barrel, and an oil inlet communicated with the cylinder barrel is formed in the cylinder barrel positioned at the bottom of the cylinder barrel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020458030.8U CN212155313U (en) | 2020-04-01 | 2020-04-01 | Damping oil cylinder for coal bed gas drilling machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020458030.8U CN212155313U (en) | 2020-04-01 | 2020-04-01 | Damping oil cylinder for coal bed gas drilling machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212155313U true CN212155313U (en) | 2020-12-15 |
Family
ID=73724669
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020458030.8U Active CN212155313U (en) | 2020-04-01 | 2020-04-01 | Damping oil cylinder for coal bed gas drilling machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212155313U (en) |
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2020
- 2020-04-01 CN CN202020458030.8U patent/CN212155313U/en active Active
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