CN109058355B - Hydraulic cylinder suitable for instantaneous high-speed heavy load buffering - Google Patents
Hydraulic cylinder suitable for instantaneous high-speed heavy load buffering Download PDFInfo
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- CN109058355B CN109058355B CN201810821260.3A CN201810821260A CN109058355B CN 109058355 B CN109058355 B CN 109058355B CN 201810821260 A CN201810821260 A CN 201810821260A CN 109058355 B CN109058355 B CN 109058355B
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- piston rod
- guide sleeve
- outer cylinder
- hole
- cylinder barrel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/10—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using liquid only; using a fluid of which the nature is immaterial
- F16F9/14—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect
- F16F9/16—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts
- F16F9/18—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with a closed cylinder and a piston separating two or more working spaces therein
- F16F9/19—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with a closed cylinder and a piston separating two or more working spaces therein with a single cylinder and of single-tube type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/3207—Constructional features
- F16F9/3221—Constructional features of piston rods
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/36—Special sealings, including sealings or guides for piston-rods
- F16F9/362—Combination of sealing and guide arrangements for piston rods
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Actuator (AREA)
Abstract
The invention discloses a hydraulic oil cylinder suitable for instantaneous high-speed large-load buffering, which utilizes the damping action of hydraulic oil in the oil cylinder and adopts a pull-type buffering mode to buffer and brake high-speed moving parts, the hydraulic oil cylinder comprises an outer cylinder barrel, a shock tube, a piston rod assembly, a guide sleeve gland, a copper piston, a piston lock nut, a cylinder bottom plug cover and a support lug cylinder bottom, the shock tube is provided with damping holes with different apertures, the damping action of each stage in a buffering stroke is set according to the position and the number of various damping holes so as to realize high-efficiency hydraulic buffering, the outer cylinder barrel is provided with an oil-filling oil circuit and is sealed by an oil plug, a cavity between the outer cylinder barrel and the shock tube, a cavity between the shock tube and a cavity between the piston rod are filled with the hydraulic oil, the hydraulic oil circulates in the two cavities, the long-time maintenance-free can be realized through the sealing of the guide sleeve and the cylinder bottom plug, the application range is wide.
Description
Technical Field
The invention belongs to the technical field of buffering, and particularly relates to a hydraulic oil cylinder suitable for instantaneous high-speed large-load buffering.
Background
The hydraulic buffer is a device which buffers, decelerates and stops an object sliding inertially by means of the damping action of hydraulic oil and plays a certain protection role, and is widely applied to the technical field of buffering. Most hydraulic buffers at present adopt pressure formula buffering, the piston rod does the inner stroke motion in the pneumatic cylinder under the impetus of external force promptly, pressure formula buffering is generally according to there being the impact part of meeting at the piston rod top, hardly guarantee concentric striking piston rod at the process of collision, especially in the instant, high speed, very easily make the piston rod because of the inhomogeneous bending deformation of atress under the effect of heavy load striking force, can't reach the buffering requirement and make the buffer damage, improve the better measure of effect and add thick for the piston rod under the pressure formula buffering condition, but will make the buffer whole too good too thick like this, it is heavy. In addition, under the condition of unbalanced stress, the eccentric wear of the piston is easily caused, so that the buffer is ineffective due to oil leakage.
The hydraulic buffer of current generally includes the outer sleeve, the hydro-cylinder, piston rod and piston assembly, the end cover, reset spring, the outer sleeve is equipped with the opening, this opening part is located to the end cover card, the hydro-cylinder sets up in the inside of outer sleeve, the lower extreme of piston rod is provided with the piston, the lower extreme of this piston is provided with the piston, this piston swing joint is inside the hydro-cylinder, the buffer capacity of the hydraulic buffer of this kind of structure is more weak, the condition that the spring elasticity performance weakens appears after using a period of time easily, there is very big influence to the life-span of hydraulic buffer, lead to the hydraulic buffer can not effectively work, can't be applied to the operating mode.
Disclosure of Invention
The invention aims to provide a hydraulic oil cylinder suitable for instantaneous high-speed heavy load buffering, and solves the problem that the existing hydraulic buffer cannot be applied to the working condition of instantaneous high-speed heavy load buffering.
The technical solution for realizing the purpose of the invention is as follows: a hydraulic cylinder suitable for instantaneous high-speed large-load buffering comprises an outer cylinder barrel, a shock tube, a piston rod lug ring, a guide sleeve pressing cover, a piston rod tail assembly, a copper piston, a piston locking nut, a cylinder bottom plug cover, a lug cylinder bottom and a cylinder bottom locking nut, wherein the shock tube is arranged in the outer cylinder barrel, a first annular cavity is formed between the outer cylinder barrel and the outer cylinder barrel, the guide sleeve is arranged at the front end of the outer cylinder barrel, the piston rod penetrates through the guide sleeve and is arranged in the shock tube, the front end of the piston rod extends out of the guide sleeve and is fixedly connected with the piston rod lug ring, a second annular cavity is formed between the shock tube and the piston rod, the bottom end of the guide sleeve extends into the second annular cavity, the cylinder bottom plug cover is positioned at the rear end of the outer cylinder barrel, the bottom end of the shock tube is sleeved on the middle section of the cylinder bottom plug cover, the bottom end of the piston rod tail assembly, the lug cylinder bottom sleeve is fixedly connected with the outer cylinder barrel at the bottom end of the outer cylinder barrel and locked by a cylinder bottom locking nut, the guide sleeve gland is annular and is sleeved at the front end of the guide sleeve and fixedly connected with the outer cylinder barrel, and the first cavity and the second cavity are filled with hydraulic oil.
Compared with the prior art, the invention has the remarkable advantages that:
(1) the special designed shock tube is provided with a plurality of damping holes with three apertures, namely a large hole, a middle hole and a small hole, the damping action of each stage in the buffer stroke is adjusted by setting the positions, the apertures and the number of various damping holes, and the damping action is gradually increased from small to small, so that the high-efficiency hydraulic buffer under the condition of instantaneous high speed and large load is realized.
(2) The cavity between the outer cylinder barrel and the shock tube, and the cavity between the shock tube and the piston rod are filled with hydraulic oil which circulates in the two cavities, and long-time maintenance-free can be realized through the sealing of the guide sleeve and the cylinder bottom plug cover.
(3) The buffering effect can be adjusted by selecting hydraulic oil with different viscosity under different high speed and load requirements, and the application range is wide.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a hydraulic cylinder suitable for instantaneous high-speed heavy load buffering according to the present invention.
FIG. 2 is a schematic view of a jar of the present invention.
Fig. 3 is a schematic view of the guide sleeve of the present invention.
Fig. 4 is a schematic view of the tail body of the present invention.
Fig. 5 is a schematic view of the cylinder bottom closure of the present invention.
Detailed Description
The present invention is described in further detail below with reference to the attached drawing figures.
The invention discloses a hydraulic oil cylinder suitable for instantaneous high-speed large-load buffering, which utilizes the damping action of hydraulic oil in the oil cylinder and adopts a pull-type buffering mode to buffer and brake a high-speed moving part.
With reference to fig. 1 to 5, the hydraulic cylinder suitable for instantaneous high-speed heavy-load buffering comprises an outer cylinder barrel 1, a shock tube 2, a piston rod 3, a piston rod earring 4, a guide sleeve 5, a guide sleeve gland 6, a piston rod tail assembly, a copper piston 7, a piston lock nut 8, a cylinder bottom plug cover 9, a support lug cylinder bottom 10 and a cylinder bottom lock nut 11, wherein the shock tube 2 is arranged in the outer cylinder barrel 1, a first annular cavity is arranged between the shock tube 2 and the outer cylinder barrel 1, the guide sleeve 5 is arranged at the front end of the outer cylinder barrel 1, the piston rod 3 passes through the guide sleeve 5 and is arranged in the shock tube 2, the front end of the piston rod 3 extends out of the guide sleeve 5 and is fixedly connected with the piston rod earring 4, a second annular cavity is arranged between the shock tube 2 and the piston rod 3, the bottom end of the guide sleeve 5 extends into the second annular cavity, the cylinder bottom plug cover 9 is arranged at the rear end of the outer cylinder barrel 1, the bottom end of the shock tube 2 is sleeved on the middle section of the, the copper piston 7 is sleeved at the bottom end of the piston rod tail assembly body and is locked by the piston locking nut 8, the support lug cylinder bottom 10 is sleeved at the bottom end of the outer cylinder barrel 1 and is fixedly connected with the outer cylinder barrel 1 and is locked by the cylinder bottom locking nut 11, the guide sleeve gland 6 is annular and is sleeved at the front end of the guide sleeve 5 and is fixedly connected with the outer cylinder barrel 1, and hydraulic oil is filled in the first cavity and the second cavity.
The piston rod lug 4 is located outside the guide sleeve 5.
The guide sleeve 5 is cylindrical, a circle of annular bulge is arranged on the middle section of the guide sleeve, two annular grooves are formed in the inner wall of the guide sleeve 5, and a dustproof ring and a sealing ring are sequentially mounted from front to back; the annular bulge is tightly attached to the inner wall of the outer cylinder barrel 1, and the bottom end of the annular bulge extends into the second annular cavity.
Four first pressure relief holes 2-1, sixteen second pressure relief holes 2-2 and twenty-five third pressure relief holes 2-3 are sequentially arranged on the shock tube 2 from back to front at intervals, wherein the diameter of the first pressure relief hole 2-1 is the largest, the diameter of the third pressure relief hole 2-3 is the smallest, the four first pressure relief holes 2-1 are distributed annularly and are close to the bottom end of the shock tube 2, the sixteen second pressure relief holes 2-2 are divided into four rows, each row is distributed annularly, the twenty-five third pressure relief holes 2-3 are sequentially arranged forwards, the hole intervals are sequentially reduced towards the front end, and the third pressure relief hole 2-3 at the front end is away from the front end of the shock tube 2.
The piston rod tail assembly comprises a tail body 12, a check valve plug 13, a check valve spring 14, a check valve steel ball 15 and a circular ring plug 16, the tail body 12 is a three-step boss, a first section and a tail section are threaded connection sections, two first through holes which are vertically crossed and communicated are formed in the side wall of the middle section, a second-step through hole which is communicated with the first through hole is formed in the bottom end, the diameter of the first-step through hole close to the bottom end is large, the diameter of a second-step through hole which is communicated with the first through hole is small, the check valve spring 14 is arranged in the second-step through hole, the check valve plug 13 is arranged in the first-step through hole, the steel ball 15 is arranged between the check valve spring 14 and the valve plug 13, and the valve plug 13 is plugged by.
The cylinder bottom plug cover 9 is of a three-section structure, the outer diameter of the cylinder bottom plug cover is sequentially increased from the front section to the rear section, the foremost end of the cylinder bottom plug cover abuts against the tail component of the piston rod, the middle section of the cylinder bottom plug cover is sleeved in the tail part of the shock tube, and the last section of the cylinder bottom plug cover is provided with an annular groove for installing a sealing ring.
The invention relates to a hydraulic oil cylinder with instantaneous high-speed and large-load buffering, which aims at the buffering working process with high speed and large load as follows:
at the beginning, the tail part of the piston rod props against the cylinder bottom blanking cover 9, and hydraulic oil is injected from the oil injection hole to ensure that the cavity between the outer cylinder barrel 1 and the shock tube 2 and the cavity between the shock tube 2 and the piston rod 3 are filled with the hydraulic oil. When the external load pulls the piston rod ear ring 4 outwards at an instantaneous high speed, the piston rod 3 moves in an external stroke, the copper piston 7 extrudes hydraulic oil in the cavity between the shock tube 2 and the piston rod 3 to enable the hydraulic oil to flow into the cavity between the outer cylinder barrel 1 and the shock tube 2 from the pressure relief holes, the middle and small diameters 2-2 and 2-3 play a pressure relief role during initial buffering, so that the initial damping effect is small, the piston rod 3 cannot be pulled off when bearing the instantaneous high-speed large load, the hydraulic oil in the cavity between the outer cylinder barrel 1 and the shock tube 2 flows into the cavity between the piston rod tail assembly and the shock tube 3 through the large-diameter pressure relief holes 2-1 due to extrusion, and the movement speed of the external load can be slowly reduced under the damping effect of the hydraulic oil.
After the buffering, piston rod 3 has been pulled out this moment, slowly bulldozes piston rod 3 and can push piston rod 3 to the end, and hydraulic oil flows into in the cavity between jar pipe 2 and the piston rod 3 from the cavity between piston rod afterbody subassembly and jar pipe 2 through the pressure release hole in this process.
Claims (3)
1. A hydraulic cylinder suitable for instantaneous high-speed heavy load buffering is characterized in that: comprises an outer cylinder barrel (1), a jarring tube (2), a piston rod (3), a piston rod ear ring (4), a guide sleeve (5), a guide sleeve gland (6), a piston rod tail component, a copper piston (7), a piston lock nut (8), a cylinder bottom plug cover (9), a support lug cylinder bottom (10) and a cylinder bottom lock nut (11), wherein the jarring tube (2) is arranged in the outer cylinder barrel (1), a first annular cavity is arranged between the outer cylinder barrel and the guide sleeve (5), the piston rod (3) passes through the guide sleeve (5) and is arranged in the jarring tube (2), the front end of the piston rod (3) extends out of the guide sleeve (5) and is fixedly connected with the piston rod ear ring (4), a second annular cavity is arranged between the jarring tube (2) and the piston rod (3), the bottom end of the guide sleeve (5) extends into the second annular cavity, the cylinder bottom plug cover (9) is positioned at the rear end of the outer cylinder barrel (1), the bottom of the jarring tube (2) is sleeved on the middle section of the jar bottom plug cover (9, the bottom end of the piston rod tail component props against the front end of a cylinder bottom plug cover (9), a copper piston (7) is sleeved at the bottom end of a piston rod tail component body and is locked by a piston locking nut (8), a lug cylinder bottom (10) is sleeved at the bottom end of an outer cylinder barrel (1) and fixedly connected with the outer cylinder barrel (1) and is locked by a cylinder bottom locking nut (11), a guide sleeve gland (6) is annular and is sleeved at the front end of a guide sleeve (5) and fixedly connected with the outer cylinder barrel (1), and hydraulic oil is filled in a first cavity and a second cavity;
four first pressure relief holes (2-1), sixteen second pressure relief holes (2-2) and twenty-five third pressure relief holes (2-3) are sequentially arranged on the shock tube (2) from back to front at intervals, the aperture of the first pressure relief hole (2-1) is the largest, the aperture of the third pressure relief hole (2-3) is the smallest, the four first pressure relief holes (2-1) are distributed in an annular mode and are close to the bottom end of the shock tube (2), the sixteen second pressure relief holes (2-2) are divided into four rows, each row is distributed in an annular mode, the twenty-five third pressure relief holes (2-3) are sequentially arranged forwards, the hole spacing is sequentially reduced towards the front end, and the third pressure relief hole (2-3) at the front end is away from the front end of the shock tube (2).
2. The hydraulic ram adapted for transient high speed heavy load buffering as set forth in claim 1, wherein: the guide sleeve (5) is cylindrical, a circle of annular bulge is arranged on the middle section of the guide sleeve, two annular grooves are formed in the inner wall of the guide sleeve (5), and a dust ring and a sealing ring are sequentially arranged from front to back; the annular bulge is tightly attached to the inner wall of the outer cylinder barrel (1), and the bottom end of the annular bulge extends into the second annular cavity.
3. The hydraulic ram adapted for transient high speed heavy load buffering as set forth in claim 1, wherein: the piston rod tail assembly comprises a tail body (12), a check valve plug (13), a check valve spring (14), a check valve steel ball (15) and a circular ring plug cover (16), the tail body (12) is a three-step boss, the first section and the tail section are threaded connection sections, two first through holes which are vertically crossed and communicated are formed in the side wall of the middle section, a second-step through hole which is communicated with the first through hole is formed in the bottom end, the aperture of the first-step hole, close to the bottom end, of the second-step through hole is large, the aperture of the second-step hole, communicated with the first through hole, is small, the check valve spring (14) is arranged in the second-step hole, the check valve plug (13) is arranged in the first-step hole, the steel ball (15) is arranged between the check valve spring (14) and the valve plug (13), and the valve plug (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810821260.3A CN109058355B (en) | 2018-07-24 | 2018-07-24 | Hydraulic cylinder suitable for instantaneous high-speed heavy load buffering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810821260.3A CN109058355B (en) | 2018-07-24 | 2018-07-24 | Hydraulic cylinder suitable for instantaneous high-speed heavy load buffering |
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| Publication Number | Publication Date |
|---|---|
| CN109058355A CN109058355A (en) | 2018-12-21 |
| CN109058355B true CN109058355B (en) | 2020-06-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810821260.3A Active CN109058355B (en) | 2018-07-24 | 2018-07-24 | Hydraulic cylinder suitable for instantaneous high-speed heavy load buffering |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6202807B1 (en) * | 1999-04-23 | 2001-03-20 | Avraham Y. Levi | Speed controlling hydraulic dampener |
| DE60018956T2 (en) * | 2000-12-29 | 2006-03-23 | Mando Corp. | Twin-tube vibration damper filled with hydraulic fluid and magnetorheological fluid |
| CN101639106A (en) * | 2009-08-25 | 2010-02-03 | 深圳市中车业成实业有限公司 | Piston-type hydro-pneumatic buffer |
| CN201475233U (en) * | 2009-08-03 | 2010-05-19 | 常州昊邦汽车零部件有限公司 | Adjustable damper |
| WO2017012112A1 (en) * | 2015-07-23 | 2017-01-26 | 童欣 | Oil damper for train |
| CN107289057A (en) * | 2017-07-05 | 2017-10-24 | 无锡比德希减震阻尼技术有限公司 | One kind can bidirectional modulation formula buffer |
| CN206889559U (en) * | 2017-07-05 | 2018-01-16 | 无锡比德希减震阻尼技术有限公司 | A kind of adjustable section buffer of New type detachable |
-
2018
- 2018-07-24 CN CN201810821260.3A patent/CN109058355B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6202807B1 (en) * | 1999-04-23 | 2001-03-20 | Avraham Y. Levi | Speed controlling hydraulic dampener |
| DE60018956T2 (en) * | 2000-12-29 | 2006-03-23 | Mando Corp. | Twin-tube vibration damper filled with hydraulic fluid and magnetorheological fluid |
| CN201475233U (en) * | 2009-08-03 | 2010-05-19 | 常州昊邦汽车零部件有限公司 | Adjustable damper |
| CN101639106A (en) * | 2009-08-25 | 2010-02-03 | 深圳市中车业成实业有限公司 | Piston-type hydro-pneumatic buffer |
| WO2017012112A1 (en) * | 2015-07-23 | 2017-01-26 | 童欣 | Oil damper for train |
| CN107289057A (en) * | 2017-07-05 | 2017-10-24 | 无锡比德希减震阻尼技术有限公司 | One kind can bidirectional modulation formula buffer |
| CN206889559U (en) * | 2017-07-05 | 2018-01-16 | 无锡比德希减震阻尼技术有限公司 | A kind of adjustable section buffer of New type detachable |
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| CN109058355A (en) | 2018-12-21 |
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