CN107387692A - A kind of motor head accessory of hydraulic formula automatic tensioner - Google Patents
A kind of motor head accessory of hydraulic formula automatic tensioner Download PDFInfo
- Publication number
- CN107387692A CN107387692A CN201710743554.4A CN201710743554A CN107387692A CN 107387692 A CN107387692 A CN 107387692A CN 201710743554 A CN201710743554 A CN 201710743554A CN 107387692 A CN107387692 A CN 107387692A
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- Prior art keywords
- piston
- check valve
- automatic tensioner
- cylinder body
- hydraulic
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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
- F16H7/0829—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
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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
- F16H7/0838—Means for varying tension of belts, ropes, or chains with vibration damping means of the dissipating material type, e.g. elastomeric spring
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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
- F16H2007/0802—Actuators for final output members
- F16H2007/0806—Compression coil springs
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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
- F16H2007/0802—Actuators for final output members
- F16H2007/0812—Fluid pressure
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- 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 discloses a kind of motor head accessory of hydraulic formula automatic tensioner, the automatic tensioner includes cylinder body, the piston of upper and lower two hydraulic pressure cavity volumes is separated into the cylinder body and by the cylinder body, the piston is provided with check valve and damping hole, and through the check valve and the damping hole, the reversing current movable property in the two hydraulic pressure cavity volume gives birth to asymmetric damping to hydraulic oil；The piston rod formed on the piston extends through the sealing unit, the automatic tensioner also includes the air storage chamber installed in another hydraulic pressure cavity volume side, the air storage chamber can compensate for, because the hydraulic pressure cavity volume up and down is poor caused by the piston movement, enabling hydraulic oil freely back and forth to produce lasting asymmetric damping in the upper lower hydraulic pressure chamber through check valve and the damping hole.The present invention can avoid belt slippage, noise and vibration, allow system normally effectively to work, and radial dimension is small, be easy to arrange, longitudinally guiding good rigidity, and piston is not easy that eccentric wear occurs with cylinder body, increases the service life.
Description
Technical field
The present invention relates to a kind of automatic tensioner, more particularly, to a kind of hydraulic auto-tensioner, the auto-tensioning
Device is designed for automobile engine front end accessory drive system.
Background technology
For the automatic tensioner of automobile engine front end accessory system, main purpose is in making belt in transmission system
Tension force is appropriate, compensation belt due to change caused by tension force or abrasion and is decayed due to being tensioned caused by engine speed fluctuations
The swing of arm, so as to avoid belt slippage, noise and vibration, system is allowed normally effectively to work.
Existing automatic tensioner is divided to two kinds：Frictional damping formula and Hydrautic damping.Frictional damping formula automatic tensioner, lead to
Cross friction member and produce frictional damping relative to the relative slip on the surface that is in contact with the sassafras part that rubs.According to patent CN 103174807A
Described automatic tensioner, damping piece can produce larger frictional damping relative to reciprocatingly sliding for pedestal, but the structure
Stretcher needs larger longitudinally mounted space.For limited longitudinally mounted space, such as the A1 of US 2010/0035712 can be used
Tensile force is delivered on belt by described automatic tensioner through tensioner arm.Automatic tensioner does not provide resistance in itself in the structure
Buddhist nun, damp by the damping piece in tensioner arm pin joint relative to tensioner arm pin joint reciprocatingly slide produce frictional damping,
Because the smaller structure of extruding force can not provide larger frictional damping.More particularly, for need it is big damping and not compared with
For the motor head accessory drive system of big longitudinal space, by the automatic tensioner as described in the A1 of US 2010/0035712
The problem can be solved by being replaced by Hydrautic damping stretcher.
Hydrautic damping automatic tensioner needs not rely on the friction of damping piece to provide damping, but passes through Repeated Compression
Its internal fluid makes reciprocating energy change into the heat energy of fluid to provide damping, and the size of damping value can be by changing
The area for becoming fluid overflow is realized.Hydraulic auto-tensioner can not only provide larger damping, and with outstanding
Asymmetric damping effect, and stable working state is reliable, vibration and noise are all smaller, and the life-span is more automatic than frictional damping formula
The length of stretcher is a lot.According to the Hydrautic damping automatic tensioner described in the A of CN 104235293 wider liquid is used to be current
The structure of damp type stretcher is pressed, stretcher is separated into inside and outside two chambers by the structure by the cylinder of setting.Fluid is being opened
Flow through the gap between plunger and cylinder or check valve during tight device compression and extension and produced in inside and outside two chambers repeatedly
Raw damping.Due to using interior exocoel, the automatic tensioner radial dimension of the structure is larger, and fluid is from plunger and cylinder
When gap is flowed out, the service life of stretcher because of the uneven bias for causing plunger of pressure, may be influenceed.
The content of the invention
The technical problem to be solved in the present invention is：The problem of existing for prior art, there is provided a kind of motor head is attached
Part Hydrautic damping automatic tensioner, stretcher coordinate tensioner arm use to provide lasting tension force for front end accessory drive system
With required damping；The stretcher radial dimension is smaller, is easy to arrange, and stretcher longitudinally guiding good rigidity, lasts a long time.
The present invention adopts the following technical scheme that realization：
A kind of motor head accessory of hydraulic formula automatic tensioner, the automatic tensioner include：
One cylinder body；
One piston；
One upper connector；
Connector once；
One helical spring；And
Hydraulic oil, the piston are arranged in the cylinder body cylinder body being separated into upper liquid pressure-volume chamber and lower hydraulic pressure cavity volume, institute
State piston and be provided with check valve and damping hole, the hydraulic oil is through the check valve and the damping hole in the upper liquid pressure-volume chamber
Asymmetric damping is given birth to reversing current movable property in lower hydraulic pressure cavity volume, the piston rod formed on the piston extends through the cylinder body
The sealing unit of upper end, the automatic tensioner also include the air storage chamber being arranged in lower hydraulic pressure cavity volume, and the air storage chamber can be mended
Repay due to the difference in volume of the upper liquid pressure-volume chamber and lower hydraulic pressure cavity volume caused by the piston movement, enable the hydraulic oil freely
Ground back and forth produces lasting asymmetric resistance through the check valve and the damping hole in the upper liquid pressure-volume chamber and lower hydraulic pressure cavity volume
Buddhist nun；The remote one end of the piston rod is connected with the upper connector, one end one transition of the cylinder body away from sealing unit
Part is connected with the lower connector, and the helical spring is coaxially mounted to the outside of the cylinder body and both ends and is supported in institute with being pressurized
State between upper connector and lower connector.
Further, the piston, which is provided with, makes the oil passage that upper liquid pressure-volume chamber connects with lower hydraulic pressure cavity volume, the list
The side of piston-rodless on the piston is coaxially mounted to valve and the piston rod, the hydraulic oil is in the automatic tensioner
Lower hydraulic pressure cavity volume can be flowed into during extension from upper hydraulic fluid chamber through oil passage, check valve.
Further, the check valve includes steel ball, check valve helical spring and unidirectional valve bonnet, described to be connected with check valve
Oil passage nozzle diameter be more than the oil passage diameter, effect of the steel ball in the check valve helical spring
Under be pressed against on the mouth of pipe.
Further, the unidirectional valve bonnet is provided with the check valve helical spring with the unidirectional valve bonnet central axis coaxial
Seat, the other end of the check valve helical spring are pressed against on the check valve helical spring seat, along the unidirectional valve bonnet circumference
Direction is arranged symmetrically some manholes.
Further, the damping hole is symmetrically arranged on the piston relative to the piston rod, the damping
The quantity and size in hole are determined that quantity is 2 ~ 8 by the automatic tensioner in the size damped needed for compression process.
Further, the air storage chamber is made up of deformable membrane and non-deformable gas hood, the material of the deformable membrane
Expect that for oil resistant rubber, the material of the non-deformable gas hood is stainless steel.
Further, the deformable membrane and non-deformable gas hood are bonded together into the air chamber of a closing, gas
Interior is full of high-pressure inert gas.
Further, the periphery of the deformable membrane and non-deformable gas hood radially extend respectively to be formed it is first annular
Flange, the second annular flange, the width of second annular flange is more than the width of first annular flange, described first annular convex
Edge, the second annular flange bond together.
Further, a boss being provided with the outside of the one end of the cylinder body away from sealing unit, inner side is provided with annular groove,
The height of the annular flange is higher than the height of the annular groove, is symmetrically provided with circular hole on two on the boss, and described the
The position that circular hole on two is corresponded on second ring flange and transition piece is respectively equipped with two middle circular holes and lower circular hole, and bolt is worn successively
Spring washer, upper circular hole, middle circular hole and lower circular hole are crossed, and cylinder body, air storage chamber and transition piece are tightened together with nut, simultaneously
Excessive part is coordinated by screw thread to be combined together with lower connector.
Further, the sealing unit and the cylinder body junction are provided with sealing ring, meanwhile, the sealing unit endoporus
In be sequentially provided with vertically with piston rod packing coordinate sealing ring and dust plug, the piston rod is close to one end of upper connector
The buffer stopper for the hard contact for preventing upper connector and sealing unit is arranged with a manner of interference.
Cylinder body is separated into two hydraulic pressure cavity volumes up and down by piston in the present invention, passes through the storage being arranged in a certain hydraulic pressure cavity volume
Air chamber compensation enables the hydraulic oil freely through institute because the hydraulic pressure cavity volume up and down caused by the piston movement is poor
State check valve and the damping hole and back and forth produce lasting asymmetric damping in the upper lower hydraulic pressure chamber, damping value obtains big I and led to
The size for overregulating damping hole on piston is realized.
Compared with prior art, the beneficial effects of the invention are as follows：This stretcher coordinates tensioner arm use to be frontal attachments
Drive system provides lasting tension force and required damping, make tension force of the belt in transmission system is appropriate, compensation belt due to
Change and decay are due to the swing of tensioner arm caused by engine speed fluctuations caused by tension force or abrasion, so as to avoid belt from beating
Sliding, noise and vibration, allow system normally effectively to work；In addition, this stretcher radial dimension is smaller, it is easy to arrange, and is tensioned
Device longitudinally guiding good rigidity, piston are not easy that eccentric wear occurs with cylinder body, and longer service life is effectively ensured.
Brief description of the drawings
Fig. 1 shows that automatic tensioner is in the structural representation of nominal position.
Fig. 2 shows the close-up schematic view of automatic tensioner piston portion.
Fig. 3 shows the partial enlarged drawing of air storage chamber part when automatic tensioner is in different compressive states.
Description of reference numerals：1- automatic tensioners, 2- cylinder bodies, 3- pistons, 4- upper connectors, connector under 5-, 6- spirals
Spring, 7- hydraulic oil, 8- upper liquid pressure-volume chambers, hydraulic pressure cavity volume under 9-, 10- check valves, 11- damping holes, 12- piston rods, 13- sealings
Unit, 14- air storage chambers, 15- oil passages, 16- steel balls, 17- check valve helical springs, the unidirectional valve covers of 18-, the 19- mouths of pipe,
20- check valve helical spring seats, 21- manholes, 22- deformable membranes, the non-deformable gas hoods of 23-, 24- high pressure inert gas
Body, the first annular flanges of 25a-, the annular flanges of 25b- second, 26- boss, the upper circular holes of 27-, 28- transition pieces, circular hole in 29-,
Circular hole under 30-, 31- bolts, 32- spring washers, 33- nuts, the sealing rings of 34a- first, the sealing rings of 34b- second, 34c- the 3rd
Sealing ring, 35- dust plugs, 36- race rings, 37- bushings, 38- buffer stoppers, 39- annular grooves.
Embodiment
The goal of the invention of the present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings, embodiment is not
It can repeat one by one herein, but therefore embodiments of the present invention are not defined in following examples.
As shown in figure 1, a kind of motor head accessory of hydraulic formula automatic tensioner, the automatic tensioner 1 include cylinder body 2,
Piston 3, upper connector 4, lower connector 5, bullet spiral spring 6, hydraulic oil 7, sealing unit 13 and air storage chamber 14.The cylinder body 2 is
Cylindrical shape, the both ends open of cylinder body 2, one end of opening are sealed by sealing unit 13, and the other end of opening passes through the He of air storage chamber 14
Sealing is realized in the tight fit of transition piece 28, and the transition piece 28 is coordinated by screw thread and is connected with the lower connector 5.The liquid
Force feed 7 is filled in the cylinder body 2, and the piston 3 is arranged in the cylinder body 2 cylinder body 2 being separated into upper liquid pressure-volume chamber 8
With lower hydraulic pressure cavity volume 9.It is single that the piston rod 12 formed on the piston 3 extends through hydraulic fluid chamber 8 and the sealing on described
Cooperated together after first 13 endoporus with the upper connector 4 by screw thread.The helical spring 6 is co-axially mounted on described
The outside of cylinder body 2, its both ends are supported between the upper connector 4 and the lower connector 5 with being pressurized.The upper connector 4
It is connected respectively with the bearing pin being fixed on tensioner arm and engine body with the lower connector 5, upper connector 4, lower connector 5
The linear compression power that helical spring 6 is acted between upper connector 4, lower connector 5 can be turned freely movable about bearing pin central rotation
It is after-applied in the constant tension power on belt to be melted into tensioner arm rotation.
Specifically, the sealing unit 13 is coordinated by screw thread and linked together with the cylinder body 2, to prevent hydraulic oil 7
Revealed from threaded connection place, the first sealing ring 34a is provided with the sealing unit 13 and the junction of the cylinder body 2.Meanwhile in institute
State piston rod 12 and axial direction of the sealing unit junction along piston rod be sequentially provided with the second sealing ring 34b, the 3rd sealing ring 34c and
Dust plug 35.
Specifically, the upper connector 4 and lower connector 5 are by race ring 36 and bushing 37 mounted therein and admittedly
Be connected due to tensioner arm with the bearing pin on engine body, can reduce automatic tensioner 1 and tensioner arm and engine base it
Between friction, tensioner arm is more smoothly rotated in the presence of automatic tensioner 1.
Specifically, the automatic tensioner 1 is additionally provided with a buffer stopper 38, and the buffer stopper 38 is enclosed on institute in a manner of interference
Piston rod 12 is stated under the round boss on one end of upper connector 4, the upper surface of the buffer stopper 38 and upper connector 4
Surface is in contact.When belt is by instantaneous large impact, upper connector 4 can be avoided to be contacted with the hard of sealing unit 13, carried
The NVH performances and security performance of high system.
As shown in Fig. 2 the piston 3 be provided with allow the one-way flow of hydraulic oil 7 check valve 10, the check valve 10 with
The piston rod 12 is coaxially mounted to that side of the piston-rodless of piston 3, and it includes steel ball 16, check valve helical spring 17
With unidirectional valve bonnet 18.The oil passage 15 for making upper liquid pressure-volume chamber 8 be connected with lower hydraulic pressure cavity volume 9 is additionally provided with the piston 3, it is described
One end of oil passage 15 is connected with upper liquid pressure-volume chamber 8, and the other end is connected with check valve 10.The oil being connected with check valve 10
The diameter of the mouth of pipe 19 of liquid passage 15 is slightly larger than the diameter of the oil passage 7, and the steel ball 16 is in the check valve helical spring
It is pressed against in the presence of 17 on the mouth of pipe 19.The other end of the check valve helical spring 17 be pressed against with unidirectional valve bonnet 18
On the check valve helical spring seat 20 of heart axis coaxle, the unidirectional valve bonnet 18 is coordinated by screw thread and the piston 3 connects.Edge
The unidirectional surface perimeter direction of valve bonnet 18 is arranged symmetrically 4 manholes 21, and the fluid in lower hydraulic pressure cavity volume 9 is through the circle
Through hole 21 communicates with the fluid in unidirectional valve bonnet 18.The hydraulic oil 7 can be from upper during the automatic tensioner 1 is upheld
Hydraulic fluid chamber 8 flows into lower hydraulic pressure cavity volume 9 through oil passage 15, check valve 10, and its course of work is：Accessory system belt tension increases
Greatly, the tension force is delivered to upper connector 4 by tensioner arm, under tension the down motion compresses spiral bullet of upper connector 4
Spring 6, the hydraulic oil 7 in upper liquid pressure-volume chamber 8 is pressurized, and the hydraulic oil 7 of pressurization is strutted in check valve spiral bullet through oil passage 15
Spring 17 is pressed against the steel ball 16 on the mouth of pipe 19 under acting on, reach the cavity volume of unidirectional valve bonnet 18, then pass through the circle on unidirectional valve bonnet 18
Shape through hole 21 flows into lower hydraulic pressure cavity volume 9.Similarly, the hydraulic oil 7 is during the automatic tensioner 1 compresses, lower hydraulic pressure
The pressure rise of hydraulic oil 7 in cavity volume 9, the fluid of high pressure acts on the steel ball so that steel ball is pressed against tighter, check valve
10 close.
Specifically, multiple damping holes 11 arranged relative to the axial symmetry of piston rod 12 are additionally provided with the piston 3.Automatic
When tight device 1 works, piston 3 moves up and down, and hydraulic oil 7 can be by the damping hole 11 back and forth in upper liquid pressure-volume chamber 8 and lower hydraulic pressure
Between cavity volume 9, now, damping hole 11 changes into the kinetic energy of system the heat energy of hydraulic oil 7, so as to produce damping.When automatic
During tight 1 stretching exercise of device, hydraulic oil 7 can flow into upper liquid pressure-volume chamber through damping hole 11 and check valve 10 from lower hydraulic pressure cavity volume 9 simultaneously
8, produce less damping；When automatic tensioner 1 compress move when, check valve 10 is closed, hydraulic oil 7 can only through damping sky 11 from
Upper liquid pressure-volume chamber 8 flows into lower hydraulic pressure cavity volume 9, caused larger damping.Pass through the check valve 10 and the damping hole 11
Combination, it is possible to achieve the asymmetric damping of automatic tensioner 1 so that the performance of automatic tensioner is more excellent, and accessory system is run more
Steadily.Especially, the quantity of the damping hole 11 and size depend on the automatic tensioner 1 in damping needed for compression process
Size, general to be no less than 2, not more than 8, the present embodiment takes 4.
As shown in figure 3, the air storage chamber 14 is made up of deformable membrane 22 and non-deformable gas hood 23, it is preferable that described
The material of deformable membrane 22 is oil resistant rubber, and the material of the non-deformable gas hood 23 is stainless steel.The deformable membrane
22 and non-deformable gas hood 23 be bonded together into the air chamber of a closing, be filled with high-pressure inert gas 24 in air chamber.It is special
The periphery of not described deformable membrane 22 and non-deformable gas hood 23 radially extend to be formed two first annular flange 25a,
Second annular flange 25b, the second annular flange 25b width is more than first annular flange 25a width, two annular flanges bonding
Together.Annular groove 39 is provided with the lower surface of cylinder body 2, the height of the first annular flange 25a is slightly above described
The height of annular groove 39, it is described first annular convex after the air storage chamber 14 assembles with upper connector 4 and transition piece 28
Edge 25a is in compressive state, is favorably improved the sealing of air storage chamber 14.On the described one end of cylinder body 2 away from sealing unit 13
Provided with a boss 26, circular hole 27 on two is symmetrically provided with the boss 26, it is corresponding on the second annular flange 25b and transition piece 28
The position of circular hole 27 is respectively equipped with two middle circular holes 29 and lower circular hole 30 on two, bolt 31 sequentially pass through spring washer 32, on
Circular hole 27, middle circular hole 29 and lower circular hole 30, attaching nut 33 tighten together cylinder body 2, air storage chamber 14 and transition piece 28.
Specifically, the position A as where the deformable membrane 22 that solid line represents in figure, name is in for automatic tensioner 1
Position where when the oil liquid pressure that is acted on during position on deformable membrane 22 and the gas pressure inside air storage chamber 14 reach balance
Put.When automatic tensioner 1 compresses downwards in nominal position, check valve 10 is closed, and hydraulic oil 7 is through damping hole 11 from upper liquid pressure-volume
Chamber 8 flows into lower hydraulic pressure cavity volume 9, and due to the presence of piston rod 12,8 increased volume of upper liquid pressure-volume chamber subtracts less than lower hydraulic pressure cavity volume 9
Few volume, this additional section hydraulic oil 7 can pass through the high pressure in variable compression shape barrier film 22 in lower hydraulic pressure cavity volume 9
Inert gas 24 makes the volume of air storage chamber 14 reduce to realize to position B；Similarly, when automatic tensioner 1 is upward in nominal position
During extension, check valve 10 is opened, and hydraulic oil 7 flows into lower hydraulic pressure cavity volume 9 through damping hole 11 and check valve 10 from upper liquid pressure-volume chamber 8,
Due to the presence of piston rod 12, the volume of the reduction of upper liquid pressure-volume chamber 8 is less than lower 9 increased volume of hydraulic pressure cavity volume, lower hydraulic pressure cavity volume 9
In this additional a part of cavity volume deformable membrane 22 can be expanded by the gas pressures of high-pressure inert gas 24 and arrive position C
Make the volume increase of air storage chamber 14 to realize.
The upper hydraulic pressure caused by being moved due to the piston 3 is compensated by the air storage chamber 14 being arranged in lower hydraulic pressure cavity volume
The difference in volume of cavity volume 8 and lower hydraulic pressure cavity volume 9, enable the hydraulic oil 7 freely through the check valve 10 and the damping hole 11
Lasting asymmetric damping back and forth is produced in the upper liquid pressure-volume chamber 8 and lower hydraulic pressure cavity volume 9, the big I of damping value passes through regulation
The size of damping hole 11 is realized on piston.
The above enumerates for the specific embodiment of the present invention, should for the equipment and structure of wherein not detailed description
When being interpreted as taking the existing common apparatus in this area and universal method to be practiced.
The above embodiment of the present invention is only to illustrate that technical solution of the present invention is used simultaneously, only the row of technical solution of the present invention
Lift, the technical scheme and its protection domain being not intended to limit the invention.Using equivalent technologies mean, equivalent apparatus etc. to this hair
The improvement of technical scheme disclosed in bright claims and specification is considered to be without departing from claims of the present invention
And the scope disclosed in specification.
Claims (10)
1. a kind of motor head accessory of hydraulic formula automatic tensioner, the automatic tensioner（1）Including：
One cylinder body（2）；
One piston（3）；
One upper connector（4）；
Connector once（5）；
One helical spring（6）；And
Hydraulic oil（7）, it is characterised in that：The piston（3）Installed in the cylinder body（2）It is interior that the cylinder body is separated into upper hydraulic pressure
Cavity volume（8）With lower hydraulic pressure cavity volume（9）, the piston（3）It is provided with check valve（10）And damping hole（11）, the hydraulic oil（7）
Through the check valve（10）With the damping hole（11）In the upper liquid pressure-volume chamber（8）With lower hydraulic pressure cavity volume（9）In back and forth flow
Asymmetric damping is produced, is formed in the piston（3）On piston rod（12）Extend through the cylinder body（2）The sealing list of upper end
Member（13）, the automatic tensioner（1）Also include being arranged on lower hydraulic pressure cavity volume（9）Interior air storage chamber（14）, the air storage chamber
（14）It can compensate for due to the piston（3）The upper liquid pressure-volume chamber caused by motion（8）With lower hydraulic pressure cavity volume（9）Difference in volume,
Make the hydraulic oil（7）Can be freely through the check valve（10）With the damping hole（11）Back and forth in the upper liquid pressure-volume chamber
（8）With lower hydraulic pressure cavity volume（9）Produce lasting asymmetric damping；The piston rod（12）It is remote（3）One end and the upper company
Fitting（4）It is connected, the cylinder body（2）Away from sealing unit（13）The transition piece of one end one（28）With the lower connector（5）
It is connected, the helical spring（6）It is coaxially mounted to the cylinder body（2）Outside and both ends be pressurized be supported in the upper connector
（4）With lower connector（5）Between.
2. motor head accessory of hydraulic formula automatic tensioner as claimed in claim 1, it is characterised in that the piston（3）
Being provided with makes upper liquid pressure-volume chamber（8）With lower hydraulic pressure cavity volume（9）The oil passage of connection（15）, the check valve（10）With the work
Stopper rod（12）It is coaxially mounted to the piston（3）Upper piston-rodless（12）Side, the hydraulic oil（7）In the auto-tensioning
Device（1）Can be from upper hydraulic fluid chamber during extension（8）Through oil passage（15）, check valve（10）Flow into lower hydraulic pressure cavity volume（9）.
3. motor head accessory of hydraulic formula automatic tensioner as claimed in claim 2, it is characterised in that the check valve
（10）Including steel ball（16）, check valve helical spring（17）With unidirectional valve bonnet（18）, described and check valve（10）Connected fluid
Passage（15）The mouth of pipe（19）Diameter is more than the diameter of the oil passage, the steel ball（16）In the check valve helical spring
（17）In the presence of be pressed against the mouth of pipe（19）On.
4. motor head accessory of hydraulic formula automatic tensioner as claimed in claim 3, it is characterised in that the unidirectional valve bonnet
（18）It is provided with the check valve helical spring seat with the unidirectional valve bonnet central axis coaxial（20）, the check valve helical spring
（17）The other end be pressed against the check valve helical spring seat（20）On, along the unidirectional valve bonnet（18）The symmetrical cloth of circumferencial direction
Put some manholes（21）.
5. motor head accessory of hydraulic formula automatic tensioner as claimed in claim 1, it is characterised in that the damping hole
（11）Relative to the piston rod（12）Axisymmetrically it is arranged in the piston（3）On, the damping hole（11）Quantity and big
It is small by the automatic tensioner（1）Determined in the size damped needed for compression process, quantity is 2 ~ 8.
6. motor head accessory of hydraulic formula automatic tensioner as claimed in claim 1, it is characterised in that the air storage chamber
（14）By deformable membrane（22）With non-deformable gas hood（23）Composition, the deformable membrane（22）Material be oil resistant rubber
Glue, the non-deformable gas hood（23）Material be stainless steel.
7. motor head accessory of hydraulic formula automatic tensioner as claimed in claim 6, it is characterised in that it is described it is deformable every
Film（22）With non-deformable gas hood（23）The air chamber of a closing is bonded together into, is full of high-pressure inert gas in air chamber
（24）.
8. motor head accessory of hydraulic formula automatic tensioner as claimed in claim 7, it is characterised in that it is described it is deformable every
Film（22）With non-deformable gas hood（23）Periphery radially extend to form first annular flange respectively（25a）, the second convex annular
Edge（25b）, second annular flange（25b）Width be more than first annular flange（25a）Width, it is described first annular convex
Edge（25a）, the second annular flange（25b）Bond together.
9. motor head accessory of hydraulic formula automatic tensioner as claimed in claim 8, it is characterised in that the cylinder body（2）
Away from sealing unit（13）One end on the outside of be provided with a boss（26）, inner side is provided with annular groove 39, the annular flange 25a
Height be higher than the annular groove 39 height, the boss（26）On symmetrically be provided with two on circular hole（27）, described second
Annular flange（25b）And transition piece（28）It is upper to correspond to circular hole on two（27）Position be respectively equipped with two middle circular holes（29）With under
Circular hole（30）, bolt（31）Sequentially pass through spring washer（32）, upper circular hole（27）, middle circular hole（29）With lower circular hole（30）, it is used in combination
Nut（33）By cylinder body（2）, air storage chamber（14）And transition piece（28）Tighten together, while excessive part（28）Coordinated by screw thread
With lower connector（5）It is combined together.
10. motor head accessory of hydraulic formula automatic tensioner as claimed in claim 1, it is characterised in that：The sealing is single
Member（13）With the cylinder body（2）Junction is provided with sealing ring, meanwhile, the sealing unit（13）It is sequentially provided with vertically in endoporus
With piston rod（12）Seal the sealing ring and dust plug coordinated（35）, the piston rod（12）Close to upper connector（4）One end
Being arranged with a manner of interference prevents upper connector（4）With sealing unit（13）Hard contact buffer stopper（38）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710743554.4A CN107387692B (en) | 2017-08-25 | 2017-08-25 | Hydraulic automatic tensioner for front end accessory of engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710743554.4A CN107387692B (en) | 2017-08-25 | 2017-08-25 | Hydraulic automatic tensioner for front end accessory of engine |
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| CN107387692A true CN107387692A (en) | 2017-11-24 |
| CN107387692B CN107387692B (en) | 2023-08-22 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108869671A (en) * | 2018-09-28 | 2018-11-23 | 奇瑞汽车股份有限公司 | Hydraulic tensioner |
| CN108869672A (en) * | 2018-08-20 | 2018-11-23 | 华南理工大学 | A kind of Double-hydraulic automatic tensioner for hybrid vehicle |
| CN112400073A (en) * | 2018-06-29 | 2021-02-23 | 哈金森公司 | Belt tensioner |
| CN115388288A (en) * | 2022-10-31 | 2022-11-25 | 廊坊市北斗神舟测控仪器有限公司 | Sensor fixing device |
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| DE102010049905A1 (en) * | 2010-10-28 | 2012-05-03 | Schaeffler Technologies Gmbh & Co. Kg | Hydraulically damped clamping system for automatically tensioning traction unit of traction drive for driving e.g. air compressor of internal combustion engine, has gas-filled reservoir arranged within piston housing as pressure reservoir |
| CN106151351A (en) * | 2015-03-24 | 2016-11-23 | 舍弗勒技术股份两合公司 | Hydraulic pressure unit and protective cover thereof |
| CN106461034A (en) * | 2014-06-20 | 2017-02-22 | 利滕斯汽车合伙公司 | Tensioner with hydraulic locking feature |
| CN207213061U (en) * | 2017-08-25 | 2018-04-10 | 华南理工大学 | A kind of motor head accessory of hydraulic formula automatic tensioner |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE102010049905A1 (en) * | 2010-10-28 | 2012-05-03 | Schaeffler Technologies Gmbh & Co. Kg | Hydraulically damped clamping system for automatically tensioning traction unit of traction drive for driving e.g. air compressor of internal combustion engine, has gas-filled reservoir arranged within piston housing as pressure reservoir |
| CN106461034A (en) * | 2014-06-20 | 2017-02-22 | 利滕斯汽车合伙公司 | Tensioner with hydraulic locking feature |
| CN106151351A (en) * | 2015-03-24 | 2016-11-23 | 舍弗勒技术股份两合公司 | Hydraulic pressure unit and protective cover thereof |
| CN207213061U (en) * | 2017-08-25 | 2018-04-10 | 华南理工大学 | A kind of motor head accessory of hydraulic formula automatic tensioner |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112400073A (en) * | 2018-06-29 | 2021-02-23 | 哈金森公司 | Belt tensioner |
| CN108869672A (en) * | 2018-08-20 | 2018-11-23 | 华南理工大学 | A kind of Double-hydraulic automatic tensioner for hybrid vehicle |
| CN108869672B (en) * | 2018-08-20 | 2023-12-01 | 华南理工大学 | Double-hydraulic automatic tensioner for hybrid electric vehicle |
| CN108869671A (en) * | 2018-09-28 | 2018-11-23 | 奇瑞汽车股份有限公司 | Hydraulic tensioner |
| CN115388288A (en) * | 2022-10-31 | 2022-11-25 | 廊坊市北斗神舟测控仪器有限公司 | Sensor fixing device |
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| CN107387692B (en) | 2023-08-22 |
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