CN108869672A - A kind of Double-hydraulic automatic tensioner for hybrid vehicle - Google Patents
A kind of Double-hydraulic automatic tensioner for hybrid vehicle Download PDFInfo
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- CN108869672A CN108869672A CN201810946076.1A CN201810946076A CN108869672A CN 108869672 A CN108869672 A CN 108869672A CN 201810946076 A CN201810946076 A CN 201810946076A CN 108869672 A CN108869672 A CN 108869672A
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- 238000007789 sealing Methods 0.000 claims abstract description 74
- 238000013016 damping Methods 0.000 claims abstract description 48
- 238000002955 isolation Methods 0.000 claims abstract description 6
- 208000002925 dental caries Diseases 0.000 claims abstract description 4
- 239000010720 hydraulic oil Substances 0.000 claims description 29
- 239000003921 oil Substances 0.000 claims description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 230000001105 regulatory effect Effects 0.000 abstract description 4
- 239000007788 liquid Substances 0.000 description 7
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- 230000005540 biological transmission Effects 0.000 description 4
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- 125000002619 bicyclic group Chemical group 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 2
- 230000002045 lasting effect Effects 0.000 description 2
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 208000019901 Anxiety disease Diseases 0.000 description 1
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Classifications
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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
- F16H7/10—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley
- F16H7/12—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley
- F16H7/1209—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley with vibration damping means
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- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
Abstract
The invention discloses a kind of Double-hydraulic automatic tensioners for hybrid vehicle, including arc-shaped cylinder body, there are two symmetrical arc-shaped cavitys for mirror settings in isolation from each other in the cylinder body, what is be slidably matched in each cavity is provided with the hollow piston being arc-shaped, one end of the hollow piston is connected with arc piston rod, the other end is connected on the cylinder body isolation part inner wall for separating two cavitys by helical spring, check valve is provided in the centre bore of the hollow piston, edge is provided through several damping holes；The exit of the cavity is provided with while cooperating with the piston rod and inboard wall of cylinder block sealing and having the ring sealing device of unilateral sliding function, and the free end of the piston rod is rotatablely connected stretcher belt wheel.The present invention guarantees the tension requirements with tension in different driving mode using arc-shaped Double-hydraulic automatic tensioner, compact-sized, and relative to friction-type automatic regulating device, the problem of wearing, long service life is not present.
Description
Technical field
The present invention relates to one kind be mounted on can reverse rotating electric generator, or starting motor/generator internal combustion engine on transmission
Belt drive system, specifically a kind of Double-hydraulic automatic tensioner for hybrid vehicle.
Background technique
For automatic tensioner as important component in motor head accessory drive system, main function is to maintain certainly
The stabilization of dynamic stretcher both ends band section tension increases the cornerite of attachment wheel, and compensation belt caused by tension or abrasion due to changing
Swing with decaying tensioner arm as caused by engine speed fluctuations mentions so that belt be avoided to generate skidding, noise and vibration
The transmission of high system is horizontal, guarantees the normal work of system.Current existing automatic tensioner is broadly divided into two kinds, it is frictional and
Fluid pressure type.Friction-type automatic regulating device generates damping, frictional with the opposite sliding on the surface being in contact by damping piece
Tight device needs biggish installation space, while damping piece can be worn with the working time, and then lead to damping vibration attenuation, and then loses
Go effect.Hydraulic auto-tensioner be then by Repeated Compression inside oil liquid damping is generated by damping hole, will be reciprocal
The energy of movement is converted into the thermal energy of oil liquid, and the size of damping can be adjusted by the size and number of damping hole, damping effect
Fruit will not substantially decay with the length for using the time, and stable working state is reliable.
In order to realize that the target of energy-saving and emission-reduction, automobile engine automatic start-stop function are gradually popularized.With automatic start-stop function
The automobile of energy, when vehicle is in halted state, engine is by break-off, to save fuel oil；After loosening the brake, hair
Motivation will be again started up, in order to realize the quick start of engine, in engine accessory drive system using integration starting/
Generator component, compared with traditional motor head accessory drive, before the engine containing integrated starting/generator component
End accessory drive system needs two stretchers to be tensioned belt.
In patent DE19926615A1（It is published on December 14th, 2000）In describe it is a kind of have for tractive force
Tight device, containing there are two tensioning wheel, the axis of oscillation of the tensioner arm of two of them tensioning wheel and the driving overlapping of axles of driving pulley.
The tensioning apparatus contains the flange shell for being used to support driving pulley bearing axis.This shortcomings that including the device of drive shaft
Have two parts, the bearing axis of driving pulley must be supported by flange shell and the design requirement entirety axial length it is significant
Increase.
It is at present using wider fluid pressure type that the fluid pressure type described in patent CN104235293 A, which damps automatic tensioner,
Stretcher is divided into interior exocoel by the cylinder being arranged by tight device, the structure, and oil liquid is during stretcher compresses and upholds
Through between plunger and cylinder gap or check valve flow repeatedly in inside and outside two chambers generate damping, due to use interior exocoel
The automatic tensioner radial dimension of room, the structure is larger, and when oil liquid is flowed out from the gap of plunger and cylinder, may be because of
Pressure unevenly causes the bias of plunger, influences the service life of stretcher.
In known solution embodiment mentioned above, in order to make belt have sufficiently large tension and bearing, adopt
It is two independent stretchers, but arranges that two stretchers are more difficult in limited motor head space, simultaneously
Using friction-type automatic regulating device, damping can decay with the time is used.In frontal attachments system condition acute variation
When, decreased underdamping is with an equal amount of system vibration of decaying, therefore system fluctuation aggravates, and tensioner arm pivot angle adds
Greatly.Big tensioner arm pivot angle leads to damping piece abrasion aggravation, and therefore damping faster reduces, system response is worse, forms an evil
Property circulation.Meanwhile tensioner arm pivot angle acute variation may cause abnormal sound, tensioner arm hits limited block and stretcher premature failure etc.
Problem.
Summary of the invention
The purpose of the present invention is to solve hybrid electric vehicle engine front end space layout anxieties, it is difficult to install two
Independent stretcher, and can be motor head accessory drive system the problem of overcome friction-type automatic regulating device damping vibration attenuation
System provides lasting tension and required damping, long service life.
The technical solution adopted by the present invention to solve the technical problems is：
A kind of Double-hydraulic automatic tensioner for hybrid vehicle, including：Arc-shaped cylinder body, in the cylinder body each other every
Liftoff mirror settings there are two symmetrical arc-shaped cavity, what being provided with of being slidably matched in each cavity was arc-shaped
Hollow piston, one end of the hollow piston are connected with the arc piston rod extended to outside cavity, and the other end passes through helical spring
It is connected on the cylinder body isolation part inner wall for separating two cavitys, check valve, side is provided in the centre bore of the hollow piston
Several damping holes are provided through at edge；The exit of the cavity is provided with while sealing with the piston rod and inboard wall of cylinder block
Cooperate and have the ring sealing device of unilateral sliding function；Hydraulic oil is filled in the cavity at the hollow piston both ends；Institute
It states the free end that piston rod extends to outside cavity and is rotatably connected to stretcher belt wheel.
Preferably, the check valve include check valve valve body, be located at the intracorporal check valve steel ball of the one-way valve,
Spring, setting direction are only capable of that hydraulic oil is made to flow to rear end by the rod end of hollow piston.
Preferably, the rod end of the hollow piston is centrally located the V-arrangement oil passage for being connected to the check valve.
Preferably, the ring sealing device includes exterior annular sealing ring, interior annular sealing ring, is connected to institute
The spring between exterior annular sealing ring and interior annular sealing ring is stated, the inner hole and piston rod of the exterior annular sealing ring are past
Multiple sealing cooperation, periphery wall position are fixedly mounted in the locating slot on the inboard wall of cylinder block, the interior annular sealing ring
Inner hole and piston rod reciprocation sealing cooperate, periphery wall and the inboard wall of cylinder block reciprocation sealing cooperate, the bicyclic sealing dress
Set the effect for not only acting as sealing, moreover it is possible to make up the difference in volume as caused by piston motion.
Further, the free end that the piston rod extends to outside cavity is provided with piston rod big end, the piston rod
Big end is rotatablely connected by bolt and stretcher belt wheel.
Preferably, the exit of the cavity is additionally provided with one end and the hollow sealing of cavity interference fit is slow
Block is rushed, the centre bore and piston rod reciprocation sealing of the sealing buffer stopper cooperate, and play the role of third layer sealing.
Preferably, the other end of the sealing buffer stopper is provided with and matches with the opposite face of the piston rod big end
Cambered surface can effectively avoid the piston rod big end of support belt wheel from contacting with the direct collision of cylinder body.
Preferably, the diameter of the damping hole is 0.8-1.2mm.
Preferably, the cylinder body is fixed on the front end of starting motor/generator by mounting bracket.
Preferably, the damping hole is symmetrical around the piston rod, and the quantity and diameter of the damping hole
Size matches with actually required damping.
Compared with prior art, the beneficial effects of the invention are as follows：This stretcher uses biliquid laminated structure can be for containing one
Change starting/generator component front end accessory drive system and lasting tension and required damping are provided, damping substantially will not
With using the time to decay, band section constant tension is maintained, the noise that skids and generate is avoided, improves stretcher service life, simultaneously should
It is compact-sized to be easily installed.
Detailed description of the invention
Fig. 1 is typical hybrid vehicle front end belt drive system layout；
Fig. 2 is the transmission agency of Fig. 1 shown device in the generator mode；
Fig. 3 is transmission agency of Fig. 1 shown device in the case where starting motor mode；
Fig. 4 is the structural schematic diagram of the auto-tensioning of the embodiment of the present invention；
Fig. 5 is the check valve of the embodiment of the present invention and the enlarged drawing of damping hole；
Working principle diagram when Fig. 6 is the closed check valve of the embodiment of the present invention；
Fig. 7 is working principle diagram when the check valve of the embodiment of the present invention is opened；
Fig. 8 is the partial enlarged view of the first ring sealing device of the embodiment of the present invention；
Fig. 9 is the piston rod speed and damping bore dia sum number magnitude relation figure of the embodiment of the present invention.
Attached drawing marks explanation：0- front end accessory drive system, 1- crankshaft pulley, 2- belt, 3- is by driving idle pulley, 4- air-conditioning
Compressor, 5- water pump, 6- start motor/generator belt wheel, 7- the first stretcher belt wheel, 8- the second stretcher belt wheel, 9- installation
Bracket, the first bolt of 10-, the second bolt of 11-, 12- First piston bar big end, 13- second piston bar big end, 14- first are sealed
Buffer stopper, 15- second seal buffer stopper, the first ring sealing device of 16-, the second ring sealing device of 17-, 16a- exterior annular
Sealing ring, 16b- interior annular sealing ring, 16c- spring, 18- First piston bar, 19- second piston bar, 20- First piston bar
Chamber, 21- second piston rod cavity, the first oil passage of 22-, the second oil passage of 23-, 24 first hollow pistons, 25- second are hollow
Piston, 26 first damping holes, the second damping hole of 27-, the first check valve of 28-, 28a- the first check valve steel ball, the first bullet of 28b-
Spring, 28c- the first check valve valve body, 29- second one-way valve, 29a- second one-way valve steel ball, 29b- second spring, 29c- second
Check valve valve body, the first helical spring of 30-, the second helical spring of 31-, the first helical spring of 32- chamber, the second helical spring of 33-
Chamber, 34- hydraulic oil, 35- cylinder body, the first stretcher of A-, the second stretcher of B-.
Specific embodiment
For a better understanding of the present invention, the embodiment of the present invention is described in further details with reference to the accompanying drawing.
Fig. 1 shows a typical frontal attachments driving（FEAD）System 0 connects crankshaft pulley 1 using belt 2, is driven
Dynamic idle pulley 3, compressor of air conditioner 4, water pump 5 start motor/generator belt wheel 6, the first stretcher belt wheel 7 and the second stretcher band
Wheel 8.
Fig. 2 is generator mode.When work is in generator mode, the first stretcher belt wheel 7 is forced by advancing side of belt tension
Reaching sealing buffer stopper position or a certain equilbrium position becomes a fixed idler, and the second stretcher B will be automatic as one
Stretcher work.
Fig. 3 is starting motor mode：When work is in starting motor mode, the second stretcher belt wheel 8 is by advancing side of belt tension
It forces and reaches sealing buffer stopper position or a certain equilbrium position as a fixed idler, the first stretcher A will be used as one
Automatic tensioner work.
As shown in figure 4, a kind of Double-hydraulic automatic tensioner for hybrid vehicle, including arc-shaped cylinder body 35,
First helical spring 30, the second helical spring 31, hydraulic oil 34, the first hollow piston 24, the second hollow piston 25, first are bicyclic
Sealing device 16, the second ring sealing device 17, first sealing buffer stopper 14, second seal buffer stopper 15, the first stretcher band
The 7, second stretcher belt wheel 8 is taken turns, mounting bracket 9 is installed in the front end of starting motor/generator, and cylinder body 35 is fixed on installation branch
On frame 9, the cylinder body 35 be it is arc-shaped, cylinder body 35 is divided into two in middle, and the left side is the first stretcher A, and the right is
For the second stretcher B, cylinder body 35 is stretched out in one end of First piston bar 18 and second piston bar 19, and end is respectively similar oval
First piston bar big end 12, the second piston bar big end 13 of shape are used to support belt wheel, the first stretcher belt wheel 7 and second
It is big that stretcher belt wheel 8 by the first bolt 10 and the second bolt 11 is separately fixed at First piston bar big end 12, second piston bar
On end 13, the other end of the First piston bar 18 and second piston bar 19 along the cylinder body 35 of arc arc-shaped cavity successively
After the first sealing sealing of buffer stopper 14, second buffer stopper 15, the first ring sealing device 16, the second ring sealing device 17
The first hollow piston 24, the second hollow piston 25 are connected, left and right cavity is divided by the first hollow piston 24, the second hollow piston 25
First helical spring chamber 32, the second helical spring chamber 33, first piston rod cavity 20, second piston rod cavity 21, described first is hollow
Piston 24,25 centre bore of the second hollow piston be equipped with identical first check valve 28 of structure, second one-way valve 29, described first
Hollow piston 24, the second hollow piston 25 rod end be centrally located respectively be connected to corresponding check valve the first oil liquid of V-arrangement it is logical
Road 22, the second oil passage 23.Wherein, the main first check valve steel ball 28a of first check valve 28, the first spring 28b,
One check valve valve body 28c composition, the second one-way valve 29 is mainly by second one-way valve steel ball 29a, second spring 29b, second
Check valve valve body 29c composition, while several are respectively equipped with around piston rod on the first hollow piston 24, the second hollow piston 25
The first damping hole 26, the second damping hole 27 being arranged symmetrically, it is specific as shown in Figure 5 for generating damping.When each helical spring is stretched
The hydraulic oil 34 can enter rod end chamber, the first spiral shell by helical spring chamber by the check valve and oil passage when opening
What rotation spring 30, the second helical spring 31 were pressurized respectively is mounted on the first hollow piston 24, the second hollow piston 25 and cylinder body 35
Between the inner wall of isolation part.
It is the enlarged drawing of the first ring sealing device 16 as shown in Figure 8, first ring sealing device 16 includes outer
Side ring shape sealing ring 16a, interior annular sealing ring 16b, the exterior annular sealing ring 16a and interior annular sealing ring are connected to
The inner hole and 18 reciprocation sealing of First piston bar of spring 16c, the exterior annular sealing ring 16a between 16b cooperate, periphery wall
Position is fixedly mounted in the locating slot on 35 inner wall of cylinder body, limits the movement of the exterior annular sealing ring 16a, institute
The inner hole and 18 reciprocation sealing of First piston bar for stating interior annular sealing ring 16b cooperate, and periphery wall and 35 inner wall of cylinder body are past
Multiple sealing cooperation, in stress, the interior annular sealing ring 16b can be slided along 35 inner wall of cylinder body, and the exterior annular is close
Seal 16a is connected with interior annular sealing ring 16b by spring 16c, and the purpose of the structure is to make up when first
Since the presence of First piston bar 18 leads to First piston bar when the hydraulic oil of helical spring chamber 32 enters first piston rod cavity 20
The volume of chamber 20 is not enough to accommodate the hydraulic oil that first piston rod cavity 20 is entered from the first helical spring chamber 32, bicyclic with first
For sealing device 16, the specific course of work is：When the hydraulic oil 34 of the first helical spring chamber 32 enters First piston bar
When chamber 20, due to the presence of First piston bar 18, the volume of first piston rod cavity 20 is not enough to accommodate the first helical spring chamber 32
The hydraulic oil 34 for entering first piston rod cavity 20 squeezes the inside under the action of first piston 20 hydraulic fluid pressure of rod cavity
Ring type seal 16b keeps the interior annular sealing ring 16b counterclockwise around the center of circle of arc-shaped cylinder body 35 along 35 inner cavity of cylinder body
Rotation increases the volume of first piston rod cavity 20 to accommodate and enters the hydraulic of first piston rod cavity 20 by the first helical spring chamber 32
Oil 34, and when hydraulic oil 34 enters the first helical spring chamber 32 from first piston chamber 20, the pressure of first piston rod cavity 20
Reduce, under the action of spring 16c, makes the interior annular sealing ring 16b along 35 inner cavity of cylinder body around arc-shaped cylinder body 35
The center of circle rotates clockwise, and reaches the position of a balance again.Second ring sealing device 17 structurally and functionally with institute
State that the first ring sealing device 16 is similar, and details are not described herein.
As shown in figure 8, the first sealing buffer stopper 14 is hollow structure, one end goes out with the cavity of cylinder body 35
It is interference fitted at mouthful, plays the role of third layer sealing, can be good at preventing the spilling of hydraulic oil in cylinder body, described first is close
The other end for sealing buffer stopper 14 is cambered surface, and the cambered surface is identical as the opposite face shape of the First piston bar big end 12, can be effective
Avoid directly contacting for piston rod support belt wheel end and cylinder body, play the role of buffering, the first sealing buffer stopper 14
Centre bore and 18 reciprocation sealing of First piston bar cooperate.Described second seals the structurally and functionally close with described first of buffer stopper 15
Envelope buffer stopper 14 is similar, and details are not described herein.
It is in the case where different damping hole count as shown in Figure 9, piston rod speed v is closed with damping bore dia d variation is corresponding
It is curve, it can be seen that piston rod speed v increases with damping bore dia d and is increased, and d is bigger, and the amplification of v is bigger, so
When actual design, in order to obtain good damping, d needs very small, the present embodiment 1mm.It is certain in damping bore dia
When, the speed of piston rod reduces with the increase of damping hole number.So the damping of the Double-hydraulic automatic tensioner can root
The quantity and diameter of damping hole are adjusted according to actual needs, to adapt to different operating conditions.
Its specific course of work of the Double-hydraulic automatic tensioner provided in this embodiment is：
When being in generator mode, extruding of the first stretcher belt wheel 7 by belt 2, First piston bar 18 pushes first
Hollow piston 24 is rotated clockwise along arc-shaped cavity, compresses the first helical spring 30, at this time the first helical spring chamber 32
Pressure rise acts on hydraulic oil 34 on first check valve 28, closes the first check valve 28, the first helical spring chamber 32
Hydraulic oil 34 can only enter first piston rod cavity 20 by the first damping hole 26, and as shown in Figure 6, arrow show hydraulic oil
Flow direction, hydraulic oil can generate damping when passing through the first damping hole 26, slow down the movement velocity of First piston bar 18, first piston
The conversion of motion of bar 18 is the thermal energy of hydraulic oil, so that the vibration to stretcher decays, shake caused by consumption belt, and
Slack list is become from pilled-in selvedge beyond second stretcher B, the belt tension acted on the second stretcher belt wheel 8 reduces, and second
Helical spring 31 is upheld, and under the action of the second helical spring 31, second piston bar 19 is quickly clockwise along arc-shaped cavity
Rotation, enables the second stretcher belt wheel 8 to be close to belt, provides tension, avoid belt slippage.Second helical spring chamber 33 at this time
34 pressure of hydraulic oil be less than second piston rod cavity 21 hydraulic fluid pressure, i.e., in second piston rod cavity 21 hydraulic oil effect
It is greater than hydraulic oil in second spring 29b and the second helical spring chamber 33 in the pressure of second one-way valve steel ball 29a and acts on second
Pressure on check valve steel ball 29a compresses second spring 29b, and second one-way valve 29 is opened, and hydraulic oil 34 passes through the second oil liquid
Channel 23 and second one-way valve 29 flow back to the second helical spring chamber 33, specific as shown in fig. 7, arrow show hydraulic oil flow direction.
And slack list is become from pilled-in selvedge when in starting motor mode, beyond the first stretcher A, act on the first stretcher belt wheel
Tension on 7 reduces, and under the action of the first helical spring 30, First piston bar 18 is quickly stretched out counterclockwise, makes
First stretcher belt wheel 7 is close to belt, avoids belt slippage, and the pressure of the hydraulic oil 34 of the first helical spring chamber 32 is small at this time
In the pressure of first piston rod cavity 20, the first check valve 28 is opened, and hydraulic oil 34 passes through the first oil liquid from first piston rod cavity 20
Channel 22 and the first check valve 28 enter the first helical spring chamber 32, and become tight from slack list beyond the second stretcher B
Side, the tension acted on the second stretcher belt wheel 8 increase, and second piston bar 19 moves in the counterclockwise direction, second piston 25
The second helical spring 31 is compressed, 34 pressure of hydraulic oil of the second helical spring chamber 33 is greater than the pressure of second piston rod cavity 21, the
Two check valves 29 are closed, and the hydraulic oil 34 of the second helical spring chamber 33 can only enter second piston bar by the second damping hole 27
In chamber 21, hydraulic oil 34 passes through the second damping hole 27, generates friction, and stretcher caused by decaying is shaken due to belt is swung, will
Vibration is converted into the thermal energy of hydraulic oil.
Above-mentioned embodiment is only a preferred solution of the present invention, not the present invention is made in any form
Limitation, there are also other variations and modifications on the premise of not exceeding the technical scheme recorded in the claims.
Claims (10)
1. a kind of Double-hydraulic automatic tensioner for hybrid vehicle, which is characterized in that including：Arc-shaped cylinder body
(35), mirror settings are there are two symmetrical arc-shaped cavity in isolation from each other in the cylinder body (35), in each cavity
What is be slidably matched is provided with the hollow piston being arc-shaped, and one end of the hollow piston is connected with the arc extended to outside cavity
Piston rod, the other end is connected on the inner wall of the cylinder body for separating two cavitys (35) isolation part by helical spring, described hollow
Check valve is provided in the centre bore of piston, edge is provided through several damping holes；The exit of the cavity is provided with
Cooperate simultaneously with the piston rod and the sealing of cylinder body (35) inner wall and has the ring sealing device of unilateral sliding function；It is described hollow
Hydraulic oil (34) are filled in the cavity at piston both ends；The free end that the piston rod extends to outside cavity, which is rotatably connected to, opens
Tight device belt wheel.
2. Double-hydraulic automatic tensioner according to claim 1, which is characterized in that the check valve includes one-way valve
Body is located at the intracorporal check valve steel ball of the one-way valve, spring, and setting direction is only capable of making hydraulic oil having by hollow piston
Rod end flows to rear end.
3. Double-hydraulic automatic tensioner according to claim 1 or 2, which is characterized in that the rod end of the hollow piston
It is centrally located the V-arrangement oil passage for being connected to the check valve.
4. Double-hydraulic automatic tensioner according to claim 1, which is characterized in that the ring sealing device includes outer
Side ring shape sealing ring, interior annular sealing ring, the bullet being connected between the exterior annular sealing ring and interior annular sealing ring
Spring, the inner hole and piston rod reciprocation sealing of the exterior annular sealing ring cooperate, and periphery wall position is fixedly mounted in the cylinder
In locating slot on body (35) inner wall, the inner hole of the interior annular sealing ring and piston rod reciprocation sealing cooperate, periphery wall with
Cylinder body (35) the inner wall reciprocation sealing cooperation.
5. Double-hydraulic automatic tensioner according to claim 1, which is characterized in that the piston rod extends to outside cavity
Free end is provided with piston rod big end, and the piston rod big end is rotatablely connected by bolt and stretcher belt wheel.
6. Double-hydraulic automatic tensioner according to claim 5, which is characterized in that the exit of the cavity is additionally provided with
The hollow sealing buffer stopper of one end and cavity interference fit, the centre bore and piston rod of the sealing buffer stopper are back and forth close
Envelope cooperation.
7. Double-hydraulic automatic tensioner according to claim 6, which is characterized in that the other end of the sealing buffer stopper is set
It is equipped with the cambered surface to match with the opposite face of the piston rod big end.
8. Double-hydraulic automatic tensioner according to claim 1, which is characterized in that the diameter of the damping hole is 0.8-
1.2mm。
9. Double-hydraulic automatic tensioner according to claim 1, which is characterized in that the cylinder body (35) passes through mounting bracket
(9) it is fixed on the front end of starting motor/generator.
10. Double-hydraulic automatic tensioner according to claim 1, which is characterized in that the damping hole surrounds the work
Stopper rod is symmetrical, and the quantity of the damping hole and diameter match with actually required damping.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810946076.1A CN108869672B (en) | 2018-08-20 | 2018-08-20 | Double-hydraulic automatic tensioner for hybrid electric vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810946076.1A CN108869672B (en) | 2018-08-20 | 2018-08-20 | Double-hydraulic automatic tensioner for hybrid electric vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108869672A true CN108869672A (en) | 2018-11-23 |
| CN108869672B CN108869672B (en) | 2023-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810946076.1A Active CN108869672B (en) | 2018-08-20 | 2018-08-20 | Double-hydraulic automatic tensioner for hybrid electric vehicle |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109695677A (en) * | 2019-03-07 | 2019-04-30 | 河北工业大学 | A kind of automatic tensioner with gas-liquid power-increasing cylinder |
| CN110375043A (en) * | 2019-06-25 | 2019-10-25 | 宁波丰茂远东橡胶有限公司 | Automatic tensioner with viscous damping property |
| CN111734802A (en) * | 2019-03-25 | 2020-10-02 | 舍弗勒技术股份两合公司 | Belt tensioner |
| CN113969962A (en) * | 2020-07-22 | 2022-01-25 | 广州汽车集团股份有限公司 | Tensioner and automobile engine transmission system with same |
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