CN114738424A - One-way hydraulic damping device - Google Patents
One-way hydraulic damping device Download PDFInfo
- Publication number
- CN114738424A CN114738424A CN202210523297.4A CN202210523297A CN114738424A CN 114738424 A CN114738424 A CN 114738424A CN 202210523297 A CN202210523297 A CN 202210523297A CN 114738424 A CN114738424 A CN 114738424A
- Authority
- CN
- China
- Prior art keywords
- piston
- cylinder body
- piston rod
- ring
- damping device
- 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.)
- Pending
Links
- 238000013016 damping Methods 0.000 title claims abstract description 41
- 238000007789 sealing Methods 0.000 claims abstract description 33
- 239000007788 liquid Substances 0.000 claims abstract description 24
- 239000000872 buffer Substances 0.000 abstract description 8
- 230000003139 buffering effect Effects 0.000 description 3
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
Images
Classifications
-
- 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
-
- 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
-
- 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
- F16F9/3235—Constructional features of cylinders
-
- 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
- F16F9/34—Special valve constructions; Shape or construction of throttling passages
- F16F9/3405—Throttling passages in or on piston body, e.g. slots
-
- 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
-
- 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
- F16F9/368—Sealings in pistons
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The invention relates to a unidirectional hydraulic damping device, comprising: the piston provided with a central hole is fixed at one end of the piston rod, a through hole, a ring groove and a liquid discharge groove which penetrate through an outer cylindrical surface and the central hole are formed in the outer cylindrical surface of the piston, the chamber sealing ring is sleeved on the ring groove of the piston and divides the inner cavity of the cylinder into an upper chamber and a lower chamber, one end of the piston rod, which is positioned in the cylinder body, penetrates through the central hole of the piston and is in clearance fit with the central hole, and when the piston rod extends out, liquid in the upper chamber enters the lower chamber through the piston through hole and the clearance between the piston rod and the piston, so that damping is provided for the extension of the piston rod; when the piston rod retracts, liquid in the lower cavity enters the upper cavity through the liquid discharge groove, so that the piston rod is reset quickly. The damping mechanism is simple and reliable, and can effectively provide damping for mechanical movement to buffer and quickly reset when being applied to a mechanical device.
Description
Technical Field
The invention relates to the field of machinery, in particular to a hydraulic damping device for buffering a motion mechanism.
Background
The existing hydraulic damping device is bidirectional damping buffering, namely, a piston rod has damping force when extending out and also has damping force when retracting, and the hydraulic damping device is not suitable for mechanical devices which need unidirectional damping requirements.
Disclosure of Invention
The present invention has been made to solve the above problems, and an object of the present invention is to provide a one-way hydraulic damping device. In order to realize the purpose, the invention provides the following technical scheme:
a one-way hydraulic damping device comprising: the device comprises a cylinder body, a piston rod, a piston, a positioning ring, an opening sealing ring, a cavity sealing ring, a guide sleeve and liquid, wherein one end of the cylinder body is closed, and the other end of the cylinder body is opened; the guide sleeve, the opening sealing ring, the positioning ring, the piston and the cavity sealing ring are sequentially arranged in the cylinder body; the one end of piston rod stretches into the cylinder body, uide bushing, oral area sealing washer, holding ring are all overlapped on the piston rod, the piston reaches the cavity sealing washer sets up the piston rod stretches into the inside one end of cylinder body, the piston is provided with the centre bore along the axial, radially is provided with the annular, be provided with through-hole and the outage groove that runs through outer cylinder face and centre bore on the outer cylinder face of piston, the cavity sealing washer suit in just cut apart cylinder body inner chamber on the annular of piston and be two upper and lower cavities, the axle head that the piston rod is located the cylinder body passes the centre bore of piston and with centre bore clearance fit.
Further, the mouth sealing ring is arranged between the guide sleeve and the positioning ring and is used for sealing liquid in the cylinder body.
Furthermore, the positioning ring is fixedly connected with the cylinder body and used for limiting the stroke of the piston rod.
Further, the holding ring is provided with the recess, the inboard of cylinder body is provided with the arch, the arch with the recess cooperation sets up, and the holding ring is fixed in on the cylinder body through this cooperation.
Furthermore, the upper and lower chambers of the cylinder body are filled with liquid.
One end of the piston rod extending out of the outer part is connected with a movement mechanism, when the movement mechanism buffers and decelerates in the extending direction of the piston rod, the piston rod is drawn to extend out, a cavity sealing ring seals a liquid discharge groove, liquid in the upper cavity enters the lower cavity through a through hole, a small gap between the shaft end of the piston rod and a central hole of the piston, damping force is generated, and the extending speed of the piston rod is controlled; when the piston rod retracts, the liquid discharge groove is opened by the cavity sealing ring, liquid in the lower cavity enters the upper cavity through the large-caliber liquid discharge groove, and the piston rod is enabled to reset quickly. The size of the fit clearance between the shaft end of the piston rod and the center hole of the piston directly influences the damping force of the piston rod, the fit clearance of various specifications can be set, and the appropriate specification is selected according to specific damping requirements.
Has the advantages that: the device has simple and reliable structure, and realizes one-way damping through the valve consisting of the cavity sealing ring and the liquid discharge groove. When the damping buffer device is applied to a mechanical motion device, the damping buffer device can effectively provide damping buffer and quick reset for mechanical motion.
Drawings
FIG. 1 is a perspective external view of the device of the present invention.
Fig. 2 is a cross-sectional view of the device of the present invention.
Fig. 3 is an enlarged sectional view of the piston portion of the device of the present invention with the chamber seal sealing the drain tank.
FIG. 4 is an enlarged cross-sectional view of the piston portion showing the chamber gasket in the open drain groove state of the device of the present invention.
FIG. 5 is an enlarged cross-sectional view of the retaining ring portion of the device of the present invention.
FIG. 6 is a piston profile view of the piston rod extension unidirectional damping of the device of the present invention.
FIG. 7 is a piston profile view of the piston rod retraction unidirectional damping of the device of the present invention.
Detailed Description
The following description will be provided in detail with reference to the accompanying drawings, which are not intended to limit the present invention, and all similar structures and similar variations using the present invention shall fall within the scope of the present invention.
A unidirectional hydraulic damping device as shown in fig. 1 to 6, comprising: the device comprises a cylinder body (2), a piston rod (1), a piston (7), a positioning ring (4), an opening sealing ring (5), a chamber sealing ring (8), a guide sleeve (3), liquid, a nut (6) and a check ring (9). One end of the cylinder body (2) is closed, and the other end is opened; the guide sleeve (3), the opening sealing ring (5), the positioning ring (4), the piston (7), the chamber sealing ring (8), the nut (6) and the check ring (9) are sequentially arranged in the cylinder body (2); one end of the piston rod (1) stretches into the cylinder body (2), the guide sleeve (3), the opening sealing ring (5) and the positioning ring (4) are all sleeved on the piston rod (1), and the piston (7) and the cavity sealing ring (8) are arranged at one end of the piston rod (1) which stretches into the cylinder body (2). As shown in fig. 6, the piston (7) is provided with a center hole (705) along the axial direction, a ring groove (702) is radially arranged, a through hole (701) penetrating through the outer cylindrical surface (707) and the center hole (705) and a liquid discharge groove (704 a) arranged at the upper part of the ring groove (702) and communicated with the ring groove (702) are arranged on the outer cylindrical surface (707) of the piston (7), and a counter bore (703) is arranged at the bottom of the piston (7). The cavity sealing ring (8) is sleeved on a ring groove (702) of the piston (7) and can move in the ring groove (702) along the axial direction, the cavity of the cylinder body (2) divided by the cavity sealing ring (8) is an upper cavity (201) and a lower cavity (202), and the shaft end (102) of the piston rod (1) located in the cylinder body (2) penetrates through a center hole (705) of the piston (7) and is in clearance fit with the center hole (705). As shown in fig. 5, the mouth seal ring (5) is provided between the guide sleeve (3) and the positioning ring (4) to seal the liquid in the cylinder (2). The positioning ring (4) is fixedly connected with the cylinder body (2) and used for limiting the stroke shaft end of the piston rod. The positioning ring (4) is provided with a groove (401), the inner side of the cylinder body (2) is provided with a protrusion (501), the protrusion (501) is matched with the groove (401), and the positioning ring (4) is fixed on the cylinder body (2) through the matching. The upper chamber (201) and the lower chamber (202) of the cylinder body (2) are filled with liquid. As shown in fig. 3 and 4, a thread (103) is arranged at one end of the piston rod (1) extending into the cylinder body (2), a threaded hole (706) is formed in the piston (7), the piston (7) is connected with the thread (103) of the piston rod (1) through the threaded hole (706), the nut (6) is fixed on the threaded portion (101) of the piston rod (1) to further lock the piston (7), and the retainer ring (9) is fixed at the end of the piston rod (1).
When the device is used in a mechanical motion mechanism, the one-way damping mechanism for the motion mechanism is as follows:
as shown in fig. 3, when the motion mechanism is decelerated in a buffering manner in the extending direction of the piston rod (1), the piston rod (1) is drawn to extend, a cavity sealing ring (8) seals a liquid discharge groove (704 a), liquid in an upper cavity (201) enters a lower cavity (202) through a through hole (701), a small gap between a piston rod shaft end (102) and a piston center hole (705), damping force is generated, and the extending speed of the piston rod (1) is controlled; as shown in fig. 4, when the piston rod (1) retracts, the chamber sealing ring (8) opens the passage of the exhaust groove (704 a), and the liquid in the lower chamber (202) enters the upper chamber (201) through the exhaust groove (704 a), so that the piston rod (1) is rapidly reset. The size of the fit clearance between the piston rod shaft end (102) and the piston center hole (705) directly influences the damping force of the device, the fit clearance with various specifications can be set, and the proper specification is selected according to the specific damping requirement. If the direction of damping needs to be changed, as shown in fig. 7, the liquid discharge groove (704 b) is arranged at the lower part of the ring groove (702), so that damping in the retraction direction of the piston rod can be realized, and no damping in the extension direction can be realized.
The device has simple and reliable structure, and realizes one-way damping through the valve consisting of the cavity sealing ring and the liquid discharge groove. When the damping buffer device is applied to a mechanical motion device, the damping buffer device can effectively provide damping buffer and quick reset for mechanical motion.
Claims (5)
1. A unidirectional hydraulic damping device comprising: the device comprises a cylinder body, a piston rod, a piston, a positioning ring, an opening sealing ring, a cavity sealing ring, a guide sleeve and liquid; one end of the cylinder body is closed, and the other end of the cylinder body is opened; the guide sleeve, the opening sealing ring, the positioning ring, the piston and the cavity sealing ring are sequentially arranged in the cylinder body; the one end of piston rod stretches into the cylinder body, uide bushing, oral area sealing washer, holding ring all overlap on the piston rod, the piston reaches the cavity sealing washer sets up the piston rod stretches into the inside one end of cylinder body, its characterized in that: the piston is provided with the centre bore along the axial, radially is provided with the annular, be provided with through-hole and the outage groove that runs through outer cylinder face and centre bore on the outer cylinder face of piston, the cavity sealing washer suit in just cut apart on the annular of piston the inner chamber of cylinder body is two upper and lower cavities, the piston rod is located axle head in the cylinder body passes the centre bore of piston and with centre bore clearance fit.
2. The unidirectional hydraulic damping device of claim 1, wherein: the mouth sealing ring is arranged between the guide sleeve and the positioning ring.
3. The unidirectional hydraulic damping device of claim 1, wherein: the positioning ring is fixedly connected with the cylinder body.
4. The unidirectional hydraulic damping device of claim 1, wherein: the locating ring is provided with a groove, the inner side of the cylinder body is provided with a protrusion, and the protrusion is matched with the groove.
5. The unidirectional hydraulic damping device of claim 1, wherein: the upper and lower cavities of the cylinder body are filled with liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210523297.4A CN114738424A (en) | 2022-05-14 | 2022-05-14 | One-way hydraulic damping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210523297.4A CN114738424A (en) | 2022-05-14 | 2022-05-14 | One-way hydraulic damping device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114738424A true CN114738424A (en) | 2022-07-12 |
Family
ID=82284848
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210523297.4A Pending CN114738424A (en) | 2022-05-14 | 2022-05-14 | One-way hydraulic damping device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114738424A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4227554A1 (en) * | 1992-08-20 | 1994-02-24 | Stabilus Gmbh | Fluid compression spring for opening car boots - has separating piston unit producing two ring like work chambers connectable with each other by valve units operating according to pressure difference or direction of movement of separating piston. |
| DE102014103615A1 (en) * | 2014-03-17 | 2015-09-17 | Hahn-Gasfedern Gmbh | Adjustable damper |
| CN205689663U (en) * | 2016-06-20 | 2016-11-16 | 谭发杨 | A kind of ratio of damping is at the uniform velocity pressed into and meets the strongest antivibrator |
| CN110081115A (en) * | 2018-04-24 | 2019-08-02 | 北京京西重工有限公司 | Damper assembly |
| CN212225854U (en) * | 2020-05-18 | 2020-12-25 | 江苏三乔智能科技有限公司 | Annular damping groove piston air spring |
| CN217401541U (en) * | 2022-05-14 | 2022-09-09 | 上海琦天汽车零部件有限公司 | One-way hydraulic damping device |
-
2022
- 2022-05-14 CN CN202210523297.4A patent/CN114738424A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4227554A1 (en) * | 1992-08-20 | 1994-02-24 | Stabilus Gmbh | Fluid compression spring for opening car boots - has separating piston unit producing two ring like work chambers connectable with each other by valve units operating according to pressure difference or direction of movement of separating piston. |
| DE102014103615A1 (en) * | 2014-03-17 | 2015-09-17 | Hahn-Gasfedern Gmbh | Adjustable damper |
| CN205689663U (en) * | 2016-06-20 | 2016-11-16 | 谭发杨 | A kind of ratio of damping is at the uniform velocity pressed into and meets the strongest antivibrator |
| CN110081115A (en) * | 2018-04-24 | 2019-08-02 | 北京京西重工有限公司 | Damper assembly |
| CN212225854U (en) * | 2020-05-18 | 2020-12-25 | 江苏三乔智能科技有限公司 | Annular damping groove piston air spring |
| CN217401541U (en) * | 2022-05-14 | 2022-09-09 | 上海琦天汽车零部件有限公司 | One-way hydraulic damping device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN217401541U (en) | One-way hydraulic damping device | |
| CN217401542U (en) | Bidirectional hydraulic damping device | |
| CN114738424A (en) | One-way hydraulic damping device | |
| CN217401535U (en) | Air spring with supporting rod speed control mechanism | |
| CN114738425A (en) | Bidirectional hydraulic damping device | |
| CN207064380U (en) | Double rod single-action hydraulic cylinders | |
| CN217401547U (en) | Hydraulic damping device with adjustable damping force | |
| CN217401543U (en) | Hydraulic damping device without idle stroke | |
| CN217401545U (en) | One-way hydraulic damping device with adjustable damping force | |
| CN217401548U (en) | Hydraulic damping device with adjustable damping force | |
| CN209724846U (en) | A kind of low friction high-speed oil cylinder | |
| CN217401549U (en) | Hydraulic damping device with damping force changing along with load | |
| CN217401546U (en) | Bidirectional hydraulic damping device with adjustable damping force | |
| CN114738426A (en) | Hydraulic damping device without idle stroke | |
| CN114738432A (en) | Hydraulic damping device with damping force changing along with load | |
| CN201368088Y (en) | Double-stage constant-thrust oil cylinder | |
| CN114738428A (en) | One-way hydraulic damping device with adjustable damping force | |
| CN205605534U (en) | Two -way equally loaded pneumatic cylinder of single pole discrepancy | |
| CN209959617U (en) | Constant-speed equal-thrust two-stage hydraulic cylinder | |
| CN114738430A (en) | Hydraulic damping device with adjustable damping force | |
| CN114738429A (en) | Bidirectional hydraulic damping device with adjustable damping force | |
| CN114738427A (en) | One-way hydraulic damping device with adjustable damping force | |
| CN114738431A (en) | Hydraulic damping device with adjustable damping force | |
| CN105782160A (en) | Single-rod inlet and outlet bi-direction equal-load hydraulic cylinder | |
| CN114738418A (en) | Air spring with support rod speed control mechanism |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |