CN216199450U - Buffer device of hydraulic oil cylinder - Google Patents
Buffer device of hydraulic oil cylinder Download PDFInfo
- Publication number
- CN216199450U CN216199450U CN202122547570.0U CN202122547570U CN216199450U CN 216199450 U CN216199450 U CN 216199450U CN 202122547570 U CN202122547570 U CN 202122547570U CN 216199450 U CN216199450 U CN 216199450U
- Authority
- CN
- China
- Prior art keywords
- piston
- plunger
- oil
- hole
- cylinder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model relates to the technical field of hydraulic oil cylinders, in particular to a buffer device of a hydraulic oil cylinder. Comprises a cylinder body, a piston rod and a piston; the piston rod is arranged in the cylinder body; one end of the piston rod is provided with a piston, and an extension cavity is formed between the piston and the cylinder bottom at the end part of the cylinder body; the piston rod is of a tubular hollow structure, an oil pipe is arranged in the piston rod, and an oil passing hole matched with the oil pipe is formed in the center of the piston; a plunger piston in sliding fit with the oil passing hole is arranged in the extending cavity; a blind hole extending to the bottom of the plunger is processed in the center of the plunger, and at least one throttling hole communicated with the blind hole is formed in the side wall of the plunger; as the piston moves towards the cylinder bottom, the plunger is inserted into the oil through hole, hydraulic oil flows out of the throttling hole, the pressure of the extension cavity rises, and the piston decelerates. The plunger of the buffering device is cylindrical, when the piston enters a terminal throttling area, hydraulic oil is extruded by the piston and flows out through a throttling port of the plunger, and meanwhile, the pressure of the cavity extending on the right side of the piston rises to enable the oil cylinder to decelerate.
Description
Technical Field
The utility model relates to the technical field of hydraulic oil cylinders, in particular to a buffer device of a hydraulic oil cylinder, which is suitable for a hydraulic oil cylinder with oil flowing inside.
Background
The hydraulic oil cylinder has great momentum when driven by hydraulic pressure and the connecting device, and at the final end of the stroke, the hydraulic rod and the hydraulic cylinder bottom can cause collision and generate great impact pressure and noise when in contact.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the defects in the prior art and provides a buffer device of a hydraulic oil cylinder.
In order to achieve the purpose, the utility model adopts the following technical scheme: a buffer device of a hydraulic oil cylinder comprises a cylinder body, a piston rod and a piston;
the piston rod is arranged in the cylinder body; a piston is arranged at one end of the piston rod, and an extension cavity is formed between the piston and the cylinder bottom at the end part of the cylinder body; the piston rod is of a tubular hollow structure, an oil pipe is arranged in the piston rod, and an oil passing hole matched with the oil pipe is formed in the center of the piston;
a plunger piston in sliding fit with the oil passing hole is arranged in the extending cavity; a blind hole extending to the bottom of the plunger is formed in the center of the plunger, and at least one throttling hole communicated with the blind hole is formed in the side wall of the plunger; along with the piston moves towards the cylinder bottom, the plunger is inserted into the oil through hole, hydraulic oil flows out of the throttling hole, the pressure of the cavity extending is increased, the piston is decelerated, and the buffering effect is achieved.
Further, the oil passing holes comprise a first oil hole and a second oil hole, and the diameter of the first oil hole is larger than that of the second oil hole; the oil pipe and the inner wall of the first oil hole are sealed through a first sealing gasket; the plunger is in sliding fit with the second oil hole, the plunger is inserted into the second oil hole along with the movement of the piston to the cylinder bottom, hydraulic oil flows out of the throttling hole, the pressure of the cavity extending is increased, and the piston is decelerated.
Further, a sealing ring is fixed at an outlet of the second oil hole.
Further, the bottom of the plunger is fixed with a mounting seat in the cylinder bottom.
Further, a gap is formed between the plunger and the cylinder bottom; the throttle hole is arranged on one side of the plunger close to the mounting seat.
Furthermore, a second sealing ring is arranged between the peripheral wall of the mounting seat and the cylinder bottom.
Furthermore, one end of the plunger close to the piston is processed into a circular truncated cone shape.
Compared with the prior art, the utility model has the beneficial effects that: the plunger of the buffering device is cylindrical, when the piston enters a terminal throttling area, hydraulic oil is extruded by the piston and flows out through a throttling port of the plunger, and meanwhile, the pressure of the cavity extending on the right side of the piston rises to enable the oil cylinder to decelerate. The buffer device aiming at the internal oil passing can well play the effects of pressurizing and decelerating at the stroke terminal.
Drawings
FIG. 1 is a cross-sectional view of a cushioning apparatus of a hydraulic ram of the present invention;
FIG. 2 is a cross-sectional view of the piston of the present invention;
wherein: the cylinder body 1, the piston rod 2, the piston 3, the extension cavity 4, the oil pipe 5, the oil passing hole 6, the first oil hole 601, the second oil hole 602, the plunger 7, the blind hole 8, the throttle hole 9, the first sealing gasket 10, the sealing ring 11, the mounting seat 12, the second sealing ring 13 and the cylinder bottom 14.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 and 2, an embodiment of the present invention is provided: a buffer device of a hydraulic oil cylinder comprises a cylinder body 1, a piston rod 2 and a piston 3;
the piston rod 2 is arranged in the cylinder body 1; a piston 3 is arranged at one end of the piston rod 2, and an extension cavity 4 is formed between the piston 3 and a cylinder bottom 14 at the end part of the cylinder body 1; the piston rod 2 is of a tubular hollow structure, an oil pipe 5 is arranged in the piston rod 2, an axially through oil passing hole 6 matched with the oil pipe 5 is formed in the center of the piston 3, and hydraulic oil enters the extension cavity 4 from the oil pipe 5;
a plunger 7 in sliding fit with the oil passing hole 6 is arranged in the extension cavity 4; the plunger 7 and the piston 3 are coaxially arranged, the plunger 7 is a cylinder, a blind hole 8 extending from the surface to the bottom of the plunger 7 is machined in the center of the plunger 7, and at least one throttling hole 9 communicated with the blind hole 8 is formed in the side wall of the plunger 7; as the piston 3 moves toward the cylinder bottom 14, the plunger 7 is inserted into the oil passing hole 6, and the hydraulic oil flows out from the orifice 9, so that the pressure of the extension chamber 4 is increased, and the piston 3 is decelerated to perform a buffering function.
Further, the oil passing hole 6 includes a first oil hole 601 and a second oil hole 602, the first oil hole 601 has a larger diameter than the second oil hole 602; the oil pipe 5 is inserted into the first oil hole 601 and sealed with the inner wall of the first oil hole 601 by a first seal 10; the inner diameter of the oil pipe 5 is slightly larger than the outer diameter of the plunger 7, because the axial length of the piston 3 is limited, in order to prevent collision between the plunger 7 and the oil pipe 5, the diameter of the first oil hole 601 is enlarged, so that the plunger 7 can be inserted into the oil pipe 5; the plunger 7 is in sliding fit with the second oil hole 602, and as the piston 3 moves towards the cylinder bottom 14, the plunger 7 is inserted into the second oil hole 602, hydraulic oil flows out of the throttle hole 9, so that the pressure of the extension cavity 4 rises, the piston decelerates, and a buffering effect is achieved.
Further, the bottom of the plunger 7 is fixed with a mounting seat 12 in a cylinder bottom 14.
Further, a gap is arranged between the plunger 7 and the cylinder bottom 14; the throttle hole 9 is arranged on one side of the plunger 7 close to the mounting seat, and hydraulic oil flows into the clearance from the throttle hole 9; a second sealing ring 13 is arranged between the peripheral wall of the mounting seat 12 and the cylinder bottom 14; the plunger 7 is fixed through the mounting seat, and the coaxiality of the plunger 7 and the piston 3 is ensured.
Further, a sealing ring 11 is fixed at the outlet of the second oil hole 602, and although the plunger 7 is in sliding fit with the second oil hole 602, a higher sealing degree is achieved, but a part of hydraulic oil is prevented from flowing out of the gap, and the buffering effect is reduced, so that the sealing ring 11 is arranged.
Furthermore, one end of the plunger 7 close to the piston 3 is machined into a circular truncated cone shape, so that the diameter of the end part of the plunger 7 close to the second oil hole 602 is smaller than that of the second oil hole 602, and when the coaxiality is slightly deviated, the plunger 7 can be inserted into the second oil hole 602 to ensure the operation of the plunger 7.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the utility model.
Claims (7)
1. The utility model provides a buffer of hydraulic cylinder which characterized in that: comprises a cylinder body, a piston rod and a piston;
the piston rod is arranged in the cylinder body; a piston is arranged at one end of the piston rod, and an extension cavity is formed between the piston and the cylinder bottom at the end part of the cylinder body; the piston rod is of a tubular hollow structure, an oil pipe is arranged in the piston rod, and an oil passing hole matched with the oil pipe is formed in the center of the piston;
a plunger piston in sliding fit with the oil passing hole is arranged in the extending cavity; a blind hole extending to the bottom of the plunger is formed in the center of the plunger, and at least one throttling hole communicated with the blind hole is formed in the side wall of the plunger; as the piston moves towards the cylinder bottom, the plunger is inserted into the oil through hole, hydraulic oil flows out of the throttling hole, the pressure of the extension cavity rises, and the piston decelerates.
2. A hydraulic ram cushioning apparatus according to claim 1, further comprising: the oil passing holes comprise a first oil hole and a second oil hole, and the diameter of the first oil hole is larger than that of the second oil hole; the oil pipe and the inner wall of the first oil hole are sealed through a first sealing gasket; the plunger is in sliding fit with the second oil hole, the plunger is inserted into the second oil hole along with the movement of the piston to the cylinder bottom, hydraulic oil flows out of the throttling hole, the pressure of the cavity extending is increased, and the piston is decelerated.
3. A hydraulic ram cushioning apparatus according to claim 2, further comprising: and a sealing ring is fixed at an outlet of the second oil hole.
4. A hydraulic ram cushioning apparatus according to claim 1, further comprising: the bottom of the plunger is fixed with a mounting seat in the cylinder bottom.
5. A hydraulic ram cushioning apparatus according to claim 4, further comprising: a gap is formed between the plunger and the cylinder bottom; the throttle hole is arranged on one side of the plunger close to the mounting seat.
6. A hydraulic ram cushioning apparatus according to claim 4, further comprising: and a second sealing ring is arranged between the peripheral wall of the mounting seat and the cylinder bottom.
7. A hydraulic ram cushioning apparatus according to claim 1, further comprising: and one end of the plunger close to the piston is processed into a circular truncated cone shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122547570.0U CN216199450U (en) | 2021-10-22 | 2021-10-22 | Buffer device of hydraulic oil cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122547570.0U CN216199450U (en) | 2021-10-22 | 2021-10-22 | Buffer device of hydraulic oil cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216199450U true CN216199450U (en) | 2022-04-05 |
Family
ID=80886967
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122547570.0U Active CN216199450U (en) | 2021-10-22 | 2021-10-22 | Buffer device of hydraulic oil cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216199450U (en) |
-
2021
- 2021-10-22 CN CN202122547570.0U patent/CN216199450U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104595281A (en) | Cushion cylinder | |
| CN203146480U (en) | Rod-less cavity side buffer structure for hydraulic cylinder | |
| CN216199450U (en) | Buffer device of hydraulic oil cylinder | |
| CN209493285U (en) | Fork truck buffer lift oil cylinder | |
| CN203463409U (en) | Oil cylinder with piston provided with small radial hole | |
| CN211573916U (en) | Oil cylinder with buffering function | |
| CN205858848U (en) | There is the energy-saving and noise-reducing single-acting blow cylinder of return reset gas spring in cylinder | |
| CN203394921U (en) | Plunger hydraulic cylinder | |
| CN213039557U (en) | Punch press hydraulic cylinder with high shock-absorbing capacity | |
| CN215058588U (en) | Built-in buffer device of hydraulic actuator cylinder piston | |
| CN214661236U (en) | Multi-stage plunger oil cylinder | |
| CN201391511Y (en) | Hydraulic cylinder cushioning device | |
| CN212959357U (en) | Two-stage hydraulic cylinder | |
| CN200940616Y (en) | Plunger hydraulic oil cylinder of braker | |
| CN205533534U (en) | Cylinder body motion is energy -conserving cylinder that strikes of low noise for nonoculture | |
| CN115289089A (en) | Piston rod built-in one-way cone valve buffer device | |
| CN112145497A (en) | Sectional type linkage double-rod plunger hydraulic cylinder | |
| CN213684767U (en) | Small hole pressure relief type buffer oil cylinder | |
| CN202441669U (en) | Pneumatic/hydraulic cylinder with buffering mechanism | |
| CN207642141U (en) | A kind of anti-drawing material mold for automobile pipe fitting molding convex closure | |
| CN214998553U (en) | Buffer oil cylinder | |
| CN110615387A (en) | Fork truck buffering lifting oil cylinder | |
| CN108097809B (en) | A kind of anti-drawing material mold for automobile pipe fitting molding convex closure | |
| CN205117887U (en) | Hydraulic cylinder is ground immediately to unsteady buffering of pulling force | |
| CN212297125U (en) | Quick start structure for gap buffer oil cylinder |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |