CN109667898A - Hydraulic tensioning device - Google Patents
Hydraulic tensioning device Download PDFInfo
- Publication number
- CN109667898A CN109667898A CN201710963870.2A CN201710963870A CN109667898A CN 109667898 A CN109667898 A CN 109667898A CN 201710963870 A CN201710963870 A CN 201710963870A CN 109667898 A CN109667898 A CN 109667898A
- Authority
- CN
- China
- Prior art keywords
- spring
- tensioner
- shell
- tensioner arms
- arms
- 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
- 230000007246 mechanism Effects 0.000 claims abstract description 11
- 239000007788 liquid Substances 0.000 claims description 8
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 239000000446 fuel Substances 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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
-
- 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
- F16H2007/081—Torsion springs
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 provides a hydraulic tensioner comprising: the hydraulic tensioning device comprises a shell, a hydraulic tensioning mechanism and a hydraulic control mechanism, wherein a piston is arranged in the hydraulic tensioning mechanism; a tensioner arm configured to be rotatable relative to the housing and a side of the tensioner arm remote from the housing to tension a chain; and a first spring configured to apply a force to the tensioner arm, capable of making an opening angle between the tensioner arm and the housing large so as to tension the chain by the tensioner arm, wherein the piston of the hydraulic tensioning mechanism is arranged to press against the tensioner arm, capable of making an opening angle between the tensioner arm and the housing large so as to tension the chain by the tensioner arm. By providing the first spring on the tensioner arm, the second spring for supporting the piston can be designed to have a lower stiffness and the yield strain between the tensioner arm and the piston can be correspondingly reduced, thereby reducing the stress concentration of the tensioner arm.
Description
Technical field
The present invention relates to the chain stretching devices in the timing system for automobile engine, more particularly to a kind of hydraulic
Tensioning apparatus.
Background technique
In the timing system of vehicle motor, need to keep the tensioning of the chain using stretcher, it is good for realizing
Working condition.
German Patent Publication DE102013200263A1 discloses a kind of hydraulic tensioner for chain drive system.The liquid
Pressing stretcher includes piston, and hydraulic fluid chambers are formed in piston, and flow reduces component and spring is kept to be arranged in the flow of pressurized
In body cavity.
Chinese invention patent discloses CN101061331A and discloses a kind of Hydranlic tensioner comprising shell and piston,
Piston has the pressure control valve for the open end for being set in piston.Pressure control valve can be opened by high pressure, so as to control from
Biasing force of the stretcher to chain.
In the stretcher of the prior art, the spring members for mechanical stiffness adjusting are only included.
Holding spring of the existing stretcher mainly by only one for piston is set, and existing stretcher is always to chain
Force, therefore, stretcher is only capable of the high oil pressure under the different working conditions by identical spring rate combination engine and mentions
For one group of tension.In order to adapt to all working conditions, need to design holding spring according to maximum service load.As a result,
Chain is usually tensioned device over-tension, also, there are high friction and wears between chain and tensioner arms.
Because often exporting high tensile force under all operating conditions by stretcher, when piston keep spring power effect under to
When outer movement, due to being full of high pressure oil in cavity, piston is difficult to move backward, and therefore, " pump up " phenomenon is also frequent occurrence.
Contact area between piston and tensioner arms generates high pressure.Also, commonly used in the tensioner arms of chain guiding by moulding
Material material is made, and the pressure of contact surface between piston and tensioner arms is excessive to will likely result in bending for tensioner arms contact area
Clothes strain, this may will affect the control of the chain for the device tensioning that is tensioned.
The high friction and strain that generate as described above possibly even will affect the NVH performance of total catenary system.
Summary of the invention
The object of the present invention is to provide a kind of while being tensioned chain suitably reduces the stress of tensioner arms and concentrates
Hydranlic tensioner.
A kind of Hydranlic tensioner comprising:
Shell is equipped with hydraulic tensioning mechanism, and the hydraulic tensioning mechanism is internally provided with piston；
Tensioner arms are configured to relative to the housing into rotation, and the tensioner arms is separate described
The side of shell is to tension chain；And
First spring is configured to exert a force to the tensioner arms, can make the tensioner arms and the shell it
Between opening angle become larger to be tensioned the chain by the tensioner arms,
Wherein, the piston of the hydraulic tensioning mechanism, which is arranged to, is pressed against the tensioner arms, can make the stretcher
Opening angle between arm and the shell becomes larger to be tensioned the chain by the tensioner arms.
In at least one embodiment, the shell is provided with sleeve, is provided in the sleeve and is used to support institute
State the second spring of piston.
In at least one embodiment, one end far from the tensioner arms of the sleeve is equipped with fuel feed hole and permission
Oil liquid enters the check-valves in the sleeve.
In at least one embodiment, the second spring is the helical spring of compression.
In at least one embodiment, the tensioner arms are provided with cylindric pivot, and the shell is provided with slotting
Pin, the bolt is inserted into the centre bore of the pivot, to enable the tensioner arms relative to the housing into rotation
Ground is installed on the shell.
In at least one embodiment, first spring is torsional spring, and the mounting coil of the torsional spring is in the pivot.
In at least one embodiment, the first leg of first spring is fixedly installed in the tensioner arms, described
Second leg of the first spring is pressed against the shell.
In at least one embodiment, first spring is leaf spring or coil spring.
In at least one embodiment, the shell is provided with first through hole, and the tensioner arms are provided with can be with
The second through-hole that the first through hole is overlapped, will be described and locking pin is inserted into the first through hole and second through-hole
Tensioner arms and the shell are maintained at pre-assembled state.
In at least one embodiment, the shell is provided with the peace for the shell to be installed to engine body
Assembling structure.
By the way that the first spring is arranged in tensioner arms, the second spring that can be used in support piston is designed to have
Lesser rigidity, the yield strain between tensioner arms and piston can accordingly reduce, so that the stress for reducing tensioner arms is concentrated.
Detailed description of the invention
Fig. 1 shows the structural schematic diagram of Hydranlic tensioner according to embodiment of the present invention.
Fig. 2 shows the partial sectional views of the Hydranlic tensioner.
Fig. 3 shows the schematic diagram of the shell of the Hydranlic tensioner.
Fig. 4 shows the schematic diagram of the tensioner arms of the Hydranlic tensioner.
Description of symbols
1 shell, 11 first through hole, 12,13 mounting holes, 14 sleeves, 15 bolts, 2 tensioner arms, 21 pivots, 22 hooks, 23
Two through-holes, 3 pistons, the bottom of 31 pistons, the space of 32 receiving oil liquid, 4 second springs, 5 check-valves, 6 locking pins, 7 first springs,
First leg of 71 first springs, the second leg of 72 first springs.
Specific embodiment
Exemplary embodiments of the present invention are described with reference to the accompanying drawings.It should be appreciated that these specific descriptions are only used for
How teaching those skilled in the art implement the present invention, rather than all feasible modes that exhaustion is of the invention, without in
It limits the scope of the invention.
Referring to figs. 1 to Fig. 4, the Hydranlic tensioner of an embodiment of the invention includes shell 1,2 and of tensioner arms
First spring 7.
Shell 1 can be installed on engine body by mounting hole 12,13 thereon via screw etc..Shell 1 is installed
There is hydraulic tensioning mechanism, more specifically, shell 1 is equipped with a sleeve 14, is equipped with piston 3, second spring 4 and non-return in sleeve 14
Valve 5.Check-valves 5 is installed in one end of the separate tensioner arms 2 of sleeve 14.Piston 3 is the cylindrical shape of an end closure open at one end,
In the case where second spring 4 is packed into piston 3, piston 3 is packed into from the opening of one end of the close tensioner arms 2 of sleeve 14
Sleeve 14, in this way, second spring 4 is compressed between the bottom of piston 3 31 and check-valves 5.The bottom 31 of piston 3 is resisted against stretcher
On arm 2.Second spring 4 can be such as helical spring.
5 side of check-valves of sleeve 14 offers fuel feed hole.The space for accommodating oil liquid is formed between sleeve 14 and piston 3
32。
Tensioner arms 2 can be made of such as plastics and be pivotally connected to shell 1.More specifically, in stretcher
One end of arm 2 is equipped with cylindric pivot 21, bolt 15 is arranged in the corresponding end of shell 1, bolt 15 is inserted into pivot 21
In centre bore, so that tensioner arms 2 are pivotally connected to shell 1.Piston 3 is between the position and pivot 21 of tensioner arms 2
It separates.Chain of the side of the separate shell 1 of tensioner arms 2 to be tensioned chain drive system.
Such as the coil set of the first spring 7 of torsional spring is on the pivot shaft 21, the first leg 71 of the first spring 7, which is fixedly mounted on, to be opened
On tight device arm 2, the second leg 72 is resisted against on shell 1.In a nonrestrictive example, tensioner arms 2, which are equipped with, accommodates the
The slot of first leg 71 of one spring 7 is equipped with the hook 22 being limited in the first leg 71 in the slot at the edge of the slot.
Piston 3 is moved along sleeve 14, and the opening angle between tensioner arms 2 and shell 1 can be made to change therewith.First
The compression or extension of spring 7 also allow the opening angle between tensioner arms 2 and shell 1 to become smaller or larger.Tensioner arms 2 and shell
Opening angle between body 1 is bigger, bigger to the tensioning of the chain power of chain drive system.
In the case where oil pressure does not act on, second spring 4 releases piston 3, to push tensioner arms 2.Meanwhile first
Spring 7 separates tensioner arms 2 rotationally with shell 1 around pivot 21.Even if to before the engine is started, the application
Hydranlic tensioner can also provide tensile force appropriate to the chain of chain drive system.
In engine start, oil liquid enters the space 32 for accommodating oil liquid from check-valves 5.Oil pressure in space 32 is further
Improve the tensile force of Hydranlic tensioner.In addition, oil liquid can also be by the clearance leakage between piston 3 and sleeve 14 to hydraulic
Except tensioning apparatus, so that piston 3 retracts under the action of chain, second spring 4 is compressed.
In a nonrestrictive example, shell 1 is equipped with first through hole 11, and tensioner arms 2 are equipped with can be with the
The second through-hole 23 that one through-hole 11 is overlapped.It is inserted into locking pin 6 in first through hole 11 and the second through-hole 23, stretcher can be kept
Smaller angle is closed relative to shell 1 or opened to arm 2, facilitates the transport and installation of Hydranlic tensioner.
Since the different location in Hydranlic tensioner is respectively provided with second spring 4 and the first spring 7, it is described can band
Carry out stress dispersion effect.A part of tension of second spring 4 is shared by the first spring 7, and two springs can be rigid in different springs
The lower work of degree.
Using after the first spring 7 between shell 1 and tensioner arms 2, the design rigidity of the second spring 4 in sleeve 14 can
To reduce, tensioner arms 2 can control angle by the first spring 7, act through piston without uniquely rely on second spring 4
3 control, thus problem that the pressure for eliminating the contact surface between piston 3 and tensioner arms 2 is excessive, and then reduce due to
The yield strain of contact surface caused by pressure is excessive.Due to the reduction of above-mentioned strong friction and yield strain, make tensioning apparatus
Better NVH performance may be implemented.
In addition, can also easily reduce or eliminate above-mentioned " pump up " phenomenon since the rigidity of second spring 4 becomes smaller.
It should be appreciated that above embodiment is merely exemplary, it is not used in the limitation present invention.Those skilled in the art can be with
Various modifications and changes are made to above embodiment under the teachings of the present invention, without departing from the scope of the present invention.
(1) tensioner arms 2 of the invention are not limited by pivot 21 and are connected on shell 1, can also can by tensioner arms 2
Rotationally it is connected on engine body.
(2) the second leg 72 of the first spring 7 of the invention is not limited to be resisted against on shell 1, and the second leg 72 can also be against
On engine body.
(3) the first spring 7 of the invention is not limited to torsional spring, can also be leaf spring, helical spring or coil spring etc..For example,
CN103206498A discloses a kind of mechanical tensioner using U-shaped coil spring, and entire contents are incorporated herein by reference.
(4) shell 1 is not limited by mounting hole 12,13 and is installed to engine body, and shell 1 can also be by other appropriate
Mounting structure be installed to engine body.
(5) in the pre-assembled state of Hydranlic tensioner of the invention, it is not necessary to first through hole 11 and the second through-hole 23 that
Locking pin 6 is inserted into the case where this overlapping.It, can be logical first in the case where locking pin 6 is the other shapes such as U-shaped
Hydranlic tensioner is maintained at pre-assembled state in the case where separating by hole 11 and the second through-hole 23.
Claims (10)
1. a kind of Hydranlic tensioner characterized by comprising
Shell is equipped with hydraulic tensioning mechanism, and the hydraulic tensioning mechanism is internally provided with piston；
Tensioner arms are configured to relative to the housing into rotation, and the separate shell of the tensioner arms
Side to tension chain；And
First spring is configured to exert a force to the tensioner arms, can make between the tensioner arms and the shell
Opening angle becomes larger to be tensioned the chain by the tensioner arms,
Wherein, the piston of the hydraulic tensioning mechanism, which is arranged to, is pressed against the tensioner arms, can make the tensioner arms and
Opening angle between the shell becomes larger to be tensioned the chain by the tensioner arms.
2. Hydranlic tensioner according to claim 1, which is characterized in that the shell is provided with sleeve, in the set
The second spring for being used to support the piston is provided in cylinder.
3. Hydranlic tensioner according to claim 2, which is characterized in that the separate tensioner arms of the sleeve
One end is equipped with fuel feed hole and oil liquid is allowed to enter the check-valves in the sleeve.
4. Hydranlic tensioner according to claim 2, which is characterized in that the second spring is the spiral bullet of compression
Spring.
5. Hydranlic tensioner according to claim 1, which is characterized in that the tensioner arms are provided with cylindric pivot
Axis, the shell are provided with bolt, and the bolt is inserted into the centre bore of the pivot, to enable the tensioner arms
The shell is installed on relative to the housing into rotation.
6. Hydranlic tensioner according to claim 5, which is characterized in that first spring is torsional spring, the torsional spring
Mounting coil in the pivot.
7. Hydranlic tensioner according to claim 1, which is characterized in that the first leg of first spring is fixedly mounted
The shell is pressed against in the second leg of the tensioner arms, first spring.
8. Hydranlic tensioner according to claim 1, which is characterized in that first spring is leaf spring or coil spring.
9. Hydranlic tensioner according to claim 1, which is characterized in that the shell is provided with first through hole, described
Tensioner arms are provided with the second through-hole that can be overlapped with the first through hole, by by locking pin be inserted into the first through hole and
Second through-hole and the tensioner arms and the shell are maintained at pre-assembled state.
10. Hydranlic tensioner according to claim 1, which is characterized in that the shell is provided with for by the shell
Body is installed to the mounting structure of engine body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710963870.2A CN109667898A (en) | 2017-10-17 | 2017-10-17 | Hydraulic tensioning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710963870.2A CN109667898A (en) | 2017-10-17 | 2017-10-17 | Hydraulic tensioning device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109667898A true CN109667898A (en) | 2019-04-23 |
Family
ID=66139727
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710963870.2A Pending CN109667898A (en) | 2017-10-17 | 2017-10-17 | Hydraulic tensioning device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109667898A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20210356022A1 (en) * | 2020-05-14 | 2021-11-18 | Tsubakimoto Chain Co. | Tensioner lever |
| US20230049971A1 (en) * | 2021-08-16 | 2023-02-16 | Tsubakimoto Chain Co. | Tensioner lever |
| US20230383819A1 (en) * | 2022-05-31 | 2023-11-30 | Borgwarner, Inc. | Face of tensioner guide or arm with pattern to influence chain system nvh performance |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6155941A (en) * | 1998-12-15 | 2000-12-05 | Borgwarner Inc. | Hydraulic tensioner having a flexible blade arm |
| US20030162614A1 (en) * | 2002-02-26 | 2003-08-28 | Hiroshi Hashimoto | Hydraulic tensioner |
| US6612952B1 (en) * | 1999-10-28 | 2003-09-02 | Borgwarner Inc. | Blade tensioner having spring blade cantilevered from distal end of arm |
| JP2006194259A (en) * | 2005-01-11 | 2006-07-27 | Borg Warner Morse Tec Japan Kk | Blade tensioner unit |
| CN101113777A (en) * | 2006-07-26 | 2008-01-30 | 大同工业株式会社 | Mechanical tensioning device for dowm pressing |
| CN101208540A (en) * | 2005-06-28 | 2008-06-25 | 博格华纳公司 | Mechanical chain tensioner with compliant blade spring |
| CN101963215A (en) * | 2009-07-21 | 2011-02-02 | 株式会社椿本链索 | Chain stretching device |
| CN103322146A (en) * | 2012-01-20 | 2013-09-25 | 伊威斯发动机系统有限责任两合公司 | Tensioning device with an unlocking element having a ramp section |
| CN104033202A (en) * | 2013-03-05 | 2014-09-10 | 伊威斯发动机系统有限责任两合公司 | Tensioning device with spring diaphragm |
| CN106051081A (en) * | 2015-02-27 | 2016-10-26 | 伊威斯发动机系统有限责任两合公司 | Tensioning rail with bayonet catch |
-
2017
- 2017-10-17 CN CN201710963870.2A patent/CN109667898A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6155941A (en) * | 1998-12-15 | 2000-12-05 | Borgwarner Inc. | Hydraulic tensioner having a flexible blade arm |
| US6612952B1 (en) * | 1999-10-28 | 2003-09-02 | Borgwarner Inc. | Blade tensioner having spring blade cantilevered from distal end of arm |
| US20030162614A1 (en) * | 2002-02-26 | 2003-08-28 | Hiroshi Hashimoto | Hydraulic tensioner |
| JP2006194259A (en) * | 2005-01-11 | 2006-07-27 | Borg Warner Morse Tec Japan Kk | Blade tensioner unit |
| CN101208540A (en) * | 2005-06-28 | 2008-06-25 | 博格华纳公司 | Mechanical chain tensioner with compliant blade spring |
| CN101113777A (en) * | 2006-07-26 | 2008-01-30 | 大同工业株式会社 | Mechanical tensioning device for dowm pressing |
| CN101963215A (en) * | 2009-07-21 | 2011-02-02 | 株式会社椿本链索 | Chain stretching device |
| CN103322146A (en) * | 2012-01-20 | 2013-09-25 | 伊威斯发动机系统有限责任两合公司 | Tensioning device with an unlocking element having a ramp section |
| CN104033202A (en) * | 2013-03-05 | 2014-09-10 | 伊威斯发动机系统有限责任两合公司 | Tensioning device with spring diaphragm |
| CN106051081A (en) * | 2015-02-27 | 2016-10-26 | 伊威斯发动机系统有限责任两合公司 | Tensioning rail with bayonet catch |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20210356022A1 (en) * | 2020-05-14 | 2021-11-18 | Tsubakimoto Chain Co. | Tensioner lever |
| US11668373B2 (en) * | 2020-05-14 | 2023-06-06 | Tsubakimoto Chain Co. | Tensioner lever |
| US20230049971A1 (en) * | 2021-08-16 | 2023-02-16 | Tsubakimoto Chain Co. | Tensioner lever |
| US11732784B2 (en) * | 2021-08-16 | 2023-08-22 | Tsubakimoto Chain Co. | Tensioner lever |
| US20230383819A1 (en) * | 2022-05-31 | 2023-11-30 | Borgwarner, Inc. | Face of tensioner guide or arm with pattern to influence chain system nvh performance |
| US12078245B2 (en) * | 2022-05-31 | 2024-09-03 | Borgwarner Inc. | Face of tensioner guide or arm with pattern to influence chain system NVH performance |
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
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Application publication date: 20190423 |