CN115076312A - Hydraulic tensioner with internal circulation structure - Google Patents
Hydraulic tensioner with internal circulation structure Download PDFInfo
- Publication number
- CN115076312A CN115076312A CN202210719054.8A CN202210719054A CN115076312A CN 115076312 A CN115076312 A CN 115076312A CN 202210719054 A CN202210719054 A CN 202210719054A CN 115076312 A CN115076312 A CN 115076312A
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- CN
- China
- Prior art keywords
- plunger
- tensioner
- oil
- hole
- hydraulic
- 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
- 238000003860 storage Methods 0.000 claims abstract description 25
- 238000007789 sealing Methods 0.000 claims abstract description 13
- 238000010276 construction Methods 0.000 claims 1
- 238000009776 industrial production Methods 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 44
- 239000010720 hydraulic oil Substances 0.000 description 13
- 238000013016 damping Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000000428 dust Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000006837 decompression Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 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
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
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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
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
- F16H7/0829—Means for varying tension of belts, ropes, or chains with vibration damping means
- F16H7/0836—Means for varying tension of belts, ropes, or chains with vibration damping means of the fluid and restriction type, e.g. dashpot
-
- 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
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
- F16H2007/0802—Actuators for final output members
- F16H2007/0812—Fluid pressure
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
Abstract
The invention relates to a hydraulic tensioner, in particular to a hydraulic tensioner with an internal circulation structure. The method comprises the following steps: a tensioner housing; a plunger slidably inserted into a plunger receiving hole of the tensioner housing, one end of the plunger extending from the plunger receiving hole and an end of the plunger extending to contact the vibrating object; one end of the plunger spring extends into the hollow part of the plunger and applies force to the plunger in the direction that the plunger extends out of the plunger accommodating hole, and the other end of the plunger spring is in contact with the one-way valve at the bottom of the plunger accommodating hole; an oil storage cavity is formed in the tensioner shell, the oil storage cavity is communicated with the one-way valve through an oil inlet channel at the bottom of the plunger accommodating hole, and a lower sealing cover is arranged at the lower end of the oil storage cavity. The problem that the hydraulic tensioner is difficult to arrange in an industrial production line without a hydraulic system is solved by arranging the oil storage cavity in the tensioner shell.
Description
Technical Field
The invention relates to a hydraulic tensioner, in particular to a hydraulic tensioner with an internal circulation structure.
Background
The existing tensioner is mainly divided into a mechanical tensioner and an external circulation hydraulic tensioner, the mechanical tensioner is mainly applied to a motorcycle timing system or an industrial production line, and when the mechanical tensioner provides tension for a chain transmission mechanism in a motorcycle or the industrial production line, the damping effect is realized only through a spring, and the damping capacity is weak; the external circulation hydraulic tensioner is mostly applied to high-end motorcycle and passenger car engines, and if the external circulation hydraulic tensioner is applied to an industrial production line, the problem of poor damping effect of the mechanical tensioner is solved, but the external circulation hydraulic tensioner needs external oil supply, so the external circulation hydraulic tensioner is difficult to arrange in the industrial production line without a hydraulic system.
Disclosure of Invention
In view of the above, the present invention is directed to a hydraulic tensioner having an internal circulation structure to solve the above-mentioned problems of the prior art.
To achieve the above object, the present invention is a hydraulic tensioner of an internal circulation structure, comprising: a tensioner housing; a plunger slidably inserted into a plunger receiving hole of the tensioner housing, one end of the plunger extending from the plunger receiving hole and an end of the plunger extending to contact the vibrating object; one end of the plunger spring extends into the hollow part of the plunger and applies force to the plunger in the direction that the plunger extends out of the plunger accommodating hole, and the other end of the plunger spring is in contact with the one-way valve at the bottom of the plunger accommodating hole; an oil storage cavity is formed in the tensioner shell, the oil storage cavity is communicated with the one-way valve through an oil inlet channel at the bottom of the plunger accommodating hole, and a lower sealing cover is arranged at the lower end of the oil storage cavity, so that the oil storage cavity forms a relatively sealed environment. Through set up the oil storage chamber in the tensioning ware casing, realize the purpose from the oil feed to solve hydraulic tensioning ware and hardly arrange the problem in the industrial production line that does not have hydraulic system.
The plunger piston comprises an upper part and a lower part, wherein the upper part is in clearance fit with the plunger piston accommodating hole, and the diameter of the lower part is smaller than that of the upper part and is matched with the lower end of the plunger piston accommodating hole to form a leakage channel; the lower part of the plunger is provided with an annular pressure reducing groove, and one side of the annular pressure reducing groove is provided with a backflow hole which is communicated with the oil storage cavity; the oil storage cavity is provided with upward extending parts close to two sides of the lower part of the plunger, and one of the upward extending parts of the oil storage cavity is communicated with the plunger accommodating hole through a backflow hole at one side of the annular decompression groove on the plunger.
When the vibrating object moves upwards, the plunger spring pushes the plunger to move upwards, the one-way valve is opened, and hydraulic oil in the oil storage cavity is pumped into the plunger; when the vibration object compresses downwards, the check valve is closed rapidly, a high-pressure oil cavity is formed inside the plunger, high-pressure liquid oil enters an annular pressure release area of the plunger through a leakage channel to form a low-pressure oil cavity, then enters an oil storage cavity through a backflow hole, partial hydraulic oil can enter a gap between the plunger accommodating hole and the plunger, the oil pressure is reduced rapidly after the pressure of the annular groove is released, the partial hydraulic oil cannot leak out from the gap between the plunger accommodating hole and the plunger, and meanwhile, the sealing ring can effectively prevent the hydraulic oil from leaking out.
It is further provided that the width of the leakage channel is 0.07 mm.
The invention is further provided with an annular groove arranged on the side wall of the upper part of the plunger, and a sealing ring is sleeved in the groove, so that the leakage of hydraulic oil from a gap between the plunger and the plunger accommodating hole can be reduced, and external dust can be placed into the working cavity.
The invention has the following beneficial effects: through set up the oil storage chamber in the tensioning ware casing, realize the purpose from the oil feed to solve hydraulic tensioning ware and hardly arrange the problem in the industrial production line that does not have hydraulic system.
Drawings
Fig. 1 is a sectional view showing a state in which the present invention is used when a vibrating object vibrates downward.
Fig. 2 is an enlarged view of a portion a in fig. 1.
Fig. 3 is a sectional view showing a state in which the present invention is used when a vibrating object vibrates upward.
Reference numerals: a tensioner housing 10, a plunger accommodating hole 11, an oil inlet passage 12, an oil storage chamber 13, a lower seal cover 14, an upward extending portion 130, a return hole 15;
a check valve 30;
the object 50 is vibrated.
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.
Examples of the invention
Referring to fig. 1, 3, the present invention is a hydraulic tensioner of an internal circulation structure, comprising: tensioner housing 10, plunger 20, plunger spring 22, check valve 30, and oil reservoir 13.
Wherein the plunger 20 is slidably inserted into the plunger receiving hole 11 of the tensioner housing 10, one end of the plunger 20 extends from the plunger receiving hole 11 and the end of the plunger 20 extending out is in contact with the vibrating object 50; one end of the plunger spring 22 extends into the hollow part 21 of the plunger 20 and applies force to the plunger 20 towards the direction that the plunger 20 extends out of the plunger accommodating hole 11, and the other end thereof is contacted with the one-way valve 30 at the bottom of the plunger accommodating hole 11; further, an oil chamber 13 is provided in the tensioner housing 10, the oil chamber 13 is communicated with the check valve 30 through an oil inlet passage 12 at the bottom of the plunger accommodating hole 11, and a lower sealing cover 14 is provided at the lower end of the oil chamber 13.
When the vibrating object 50 moves upward, the plunger spring 22 pushes the plunger 20 to move upward, the check valve 30 opens, the hydraulic oil in the oil storage chamber 13 is drawn into the plunger 20, and in the process, a small negative pressure exists in the hollow part 21 of the plunger 20, so that the upward thrust force applied to the plunger 20 is slightly smaller than the spring force.
As an embodiment of the present invention, referring to fig. 2, the plunger 20 is divided into an upper portion and a lower portion, wherein the upper portion of the plunger 20 is in clearance fit with the plunger receiving hole 11, the lower portion of the plunger 20 has a diameter smaller than the upper portion of the plunger 20 and is fitted with the lower end of the plunger receiving hole 11 to form a leakage path 26, and the width of the leakage path 26 is 0.07 mm; an annular groove 24 is formed in the side wall of the upper portion of the plunger 20, and a sealing ring 25 is sleeved in the groove 24; and the lower portion of the plunger 20 is provided with an annular pressure-reducing groove 23, and one side of the annular pressure-reducing groove 23 is provided with a return hole 15, the return hole 15 being located on the left or right side of the annular pressure-reducing groove 23 while the return hole 23 communicates with the oil storage chamber 13.
In this embodiment, when the vibrating object 50 is compressed downward, the check valve 30 is closed rapidly, a high pressure oil chamber is formed inside the plunger 20, oil in the high pressure oil chamber enters the annular pressure reducing groove 23 of the plunger 20 through the leakage passage 26, and the annular pressure reducing groove 23 and the inner wall of the plunger receiving hole 11 form a low pressure oil chamber, while the oil enters the oil storage chamber 13 through the return hole 15 on the side of the annular pressure reducing groove 23, so that the self-sufficient effect is achieved.
In the process, although a part of hydraulic oil enters between the tensioner housing 10 and the plunger 20, after the hydraulic oil is decompressed through the annular groove, the oil pressure entering the gap between the plunger accommodating hole 11 and the plunger 20 is reduced, and the leakage of the hydraulic oil in the gap can be effectively prevented through the sealing ring 25; due to the annular groove 24 and the sealing ring 25, external dust is prevented from entering the chamber from the gap when the plunger 20 moves up and down.
As an embodiment of the present invention, the oil storage chamber 13 is provided with upward extending portions 130 near the lower portion of the plunger 20, and one of the upward extending portions 130 of the oil storage chamber 13 communicates with the plunger accommodating hole 11 through a return hole 15 on the side of the annular pressure reducing groove 23 of the plunger 20, wherein the return hole 15 may be on the side of the upward extending portion on the left side or on the side of the upward extending portion on the right side.
When the vibration body 50 vibrates, the vibration body 50 applies force downwards, at the moment, the one-way valve is closed quickly, a high-pressure oil chamber is formed in the hollow part 21 of the plunger 20, the pressure of the high-pressure oil chamber is mainly determined by the downward compression speed of the plunger 20, liquid oil enters an annular pressure release area of the plunger 20 through a leakage channel to form a low-pressure oil chamber and then enters the oil storage chamber 13 through the return hole 15, part of the hydraulic oil enters a gap between the plunger accommodating hole 11 and the plunger 20, but the oil pressure is reduced quickly after passing through the annular pressure reduction groove 23, the part of the hydraulic oil cannot leak out from the gap between the plunger accommodating hole 11 and the plunger 20, and simultaneously, because the annular groove 24 is arranged at the upper part of the plunger 20 and the sealing ring 25 is sleeved in the groove 24, the sealing ring 25 is matched with the plunger accommodating hole 11, not only can the leakage of the hydraulic oil between the plunger 20 and the plunger receiving hole 11 be prevented, but also external dust can be prevented from entering the working chamber; when the vibrating object 50 moves upward, the plunger spring 22 pushes the plunger 20 to move upward, the check valve 30 is opened, and the hydraulic oil in the oil chamber 13 is drawn into the hollow portion 21 of the plunger 20, at which time, the end of the plunger 20 contacts the vibrating object 50 and provides tension to the vibrating object 50, thereby achieving the effect of first damping the transmission of the vibrating object 50.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (6)
1. A hydraulic tensioner of internal circulation construction comprising: a tensioner housing (10); a plunger (20) slidably inserted into the plunger receiving hole (11) of the tensioner housing (10), wherein one end of the plunger (20) extends from the plunger receiving hole (11) and the extended end of the plunger (20) is in contact with the vibrating object (50); a plunger spring (22), wherein one end of the plunger spring extends into the hollow part (21) of the plunger (20) and applies force to the plunger (20) towards the direction that the plunger (20) extends out of the plunger accommodating hole (11), and the other end of the plunger spring is contacted with a one-way valve (30) at the bottom of the plunger accommodating hole (11); the tensioner is characterized in that an oil storage cavity (13) is arranged in the tensioner shell (10), the oil storage cavity (13) is communicated with the one-way valve (30) through an oil inlet channel (12) at the bottom of the plunger accommodating hole (11), and a lower sealing cover (14) is arranged at the lower end of the oil storage cavity (13).
2. The hydraulic tensioner as claimed in claim 1, wherein the upper portion of the plunger (20) is in clearance fit with the plunger receiving hole (11), and the lower portion of the plunger (20) has a smaller diameter than the upper portion of the plunger (20) and forms the leakage passage (26) in cooperation with the lower end of the plunger receiving hole (11).
3. The hydraulic tensioner of an internal circulation structure as claimed in claim 2, wherein the lower portion of the plunger (20) is provided with an annular pressure-reducing groove (23), and one side of the annular pressure-reducing groove (23) is provided with a return hole (15), the return hole (15) being located on the left or right side of the annular pressure-reducing groove (23) while the return hole (23) communicates with the oil reservoir chamber (13).
4. The hydraulic tensioner of claim 3, wherein the oil chamber (13) is provided with an upward extending portion (130) near a lower portion of the plunger (20), and one of the upward extending portions (130) of the oil chamber (13) communicates with the plunger receiving hole (11) through a return hole (15) at a side of the annular pressure reducing groove (23) of the plunger (20).
5. The hydraulic tensioner as claimed in claim 2, wherein the width of the leakage path (26) is 0.07 mm.
6. The hydraulic tensioner as claimed in claim 1, wherein the plunger (20) has an annular groove (24) formed in an upper side wall thereof, and the groove (24) is fitted with a sealing ring (25).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210719054.8A CN115076312A (en) | 2022-06-23 | 2022-06-23 | Hydraulic tensioner with internal circulation structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210719054.8A CN115076312A (en) | 2022-06-23 | 2022-06-23 | Hydraulic tensioner with internal circulation structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115076312A true CN115076312A (en) | 2022-09-20 |
Family
ID=83255484
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210719054.8A Pending CN115076312A (en) | 2022-06-23 | 2022-06-23 | Hydraulic tensioner with internal circulation structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115076312A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103925348A (en) * | 2013-01-11 | 2014-07-16 | 株式会社椿本链条 | Chain Tensioner |
| US20160123435A1 (en) * | 2014-10-29 | 2016-05-05 | Tsubakimoto Chain Co. | Tensioner |
| WO2016128128A1 (en) * | 2015-02-09 | 2016-08-18 | Iwis Motorsysteme Gmbh & Co. Kg | Autonomous clamping device |
| WO2020032094A1 (en) * | 2018-08-10 | 2020-02-13 | Ntn株式会社 | Chain tensioner |
| WO2020184322A1 (en) * | 2019-03-11 | 2020-09-17 | Ntn株式会社 | Chain tensioner |
| WO2020189487A1 (en) * | 2019-03-20 | 2020-09-24 | Ntn株式会社 | Chain tensioner |
| CN112832884A (en) * | 2019-11-25 | 2021-05-25 | 湖南罗佑发动机部件有限公司 | Tensioner and engine |
-
2022
- 2022-06-23 CN CN202210719054.8A patent/CN115076312A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103925348A (en) * | 2013-01-11 | 2014-07-16 | 株式会社椿本链条 | Chain Tensioner |
| US20160123435A1 (en) * | 2014-10-29 | 2016-05-05 | Tsubakimoto Chain Co. | Tensioner |
| WO2016128128A1 (en) * | 2015-02-09 | 2016-08-18 | Iwis Motorsysteme Gmbh & Co. Kg | Autonomous clamping device |
| CN107743558A (en) * | 2015-02-09 | 2018-02-27 | 伊威斯发动机系统有限责任两合公司 | Independent tensioning apparatus |
| WO2020032094A1 (en) * | 2018-08-10 | 2020-02-13 | Ntn株式会社 | Chain tensioner |
| WO2020184322A1 (en) * | 2019-03-11 | 2020-09-17 | Ntn株式会社 | Chain tensioner |
| EP3940261A1 (en) * | 2019-03-11 | 2022-01-19 | NTN Corporation | Chain tensioner |
| WO2020189487A1 (en) * | 2019-03-20 | 2020-09-24 | Ntn株式会社 | Chain tensioner |
| EP3943777A1 (en) * | 2019-03-20 | 2022-01-26 | NTN Corporation | Chain tensioner |
| CN112832884A (en) * | 2019-11-25 | 2021-05-25 | 湖南罗佑发动机部件有限公司 | Tensioner and engine |
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