CN109695677A - A kind of automatic tensioner with gas-liquid power-increasing cylinder - Google Patents
A kind of automatic tensioner with gas-liquid power-increasing cylinder Download PDFInfo
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- CN109695677A CN109695677A CN201910170182.XA CN201910170182A CN109695677A CN 109695677 A CN109695677 A CN 109695677A CN 201910170182 A CN201910170182 A CN 201910170182A CN 109695677 A CN109695677 A CN 109695677A
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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
- F16H2007/0802—Actuators for final output members
- F16H2007/0812—Fluid pressure
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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
- F16H2007/0842—Mounting or support of tensioner
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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
- F16H2007/0863—Finally actuated members, e.g. constructional details thereof
- F16H2007/0865—Pulleys
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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
- F16H2007/0863—Finally actuated members, e.g. constructional details thereof
- F16H2007/0874—Two or more finally actuated members
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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
- F16H2007/0889—Path of movement of the finally actuated member
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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
本发明公开了一种带有气液增力缸的自动张紧器，包括气液增力缸；气液增力缸包括缸体、串联分界壁、储油罐、左部和右部；左部和右部对称地安装于缸体内部；缸体中间固定有串联分界壁；串联分界壁上具有通孔，将左部和右部连通；缸体上对称地安装有两个储油罐；储油罐包括储油罐罐体和储油罐活塞；左部和右部的结构完全相同，均包括密封缓冲块、导向块、活塞杆、液动缸活塞、缸筒串联分界壁、气动缸活塞和挡块；气动缸活塞、串联分界壁和缸体形成气动缸活塞腔，气动缸活塞腔中具有气体。本张紧器通过气动缸活塞插入气动缸活塞腔压缩气室气体作为主要缓冲阻尼，该阻尼基本不会随使用时间衰减，保证了张紧器的稳定工作。
The invention discloses an automatic tensioner with a gas-liquid booster cylinder, comprising a gas-liquid booster cylinder; the gas-liquid booster cylinder comprises a cylinder block, a series boundary wall, an oil storage tank, a left part and a right part; The part and the right part are symmetrically installed inside the cylinder body; a series dividing wall is fixed in the middle of the cylinder body; the series dividing wall is provided with a through hole to connect the left part and the right part; two oil storage tanks are symmetrically installed on the cylinder body; The oil storage tank includes the oil storage tank body and the oil storage tank piston; the structure of the left and right parts is exactly the same, including the sealing buffer block, the guide block, the piston rod, the hydraulic cylinder piston, the cylinder series boundary wall, the pneumatic cylinder A piston and a stopper; a pneumatic cylinder piston, a series dividing wall and a cylinder block form a pneumatic cylinder piston cavity, and the pneumatic cylinder piston cavity has gas. The tensioner inserts the pneumatic cylinder piston into the pneumatic cylinder piston cavity to compress the air chamber gas as the main buffer damping, the damping basically does not decay with the use time, and ensures the stable operation of the tensioner.
Description
Technical field
The present invention relates to field of hydraulic equipment, specifically a kind of automatic tensioner with gas-liquid power-increasing cylinder.
Background technique
In order to realize that the target of energy-saving and emission-reduction, automobile engine automatic start-stop function are gradually popularized.When with automatic start-stop
When the automobile of function is in halted state, engine is by break-off, to save fuel oil；After loosening the brake, engine
It will be again started up.In order to realize the quick start of engine, opened containing integration used in the engine accessory drive system
System needs two are solely by the FEAD (Front End Accessory Drive, frontal attachments driving) of dynamic motor/generator component
Vertical stretcher either contains that there are two the automatic tensioners of tensioner arm to be tensioned to belt, and the latter is current mainstream choosing
It selects.
FEAD system generally comprises belt, starting motor/generator belt wheel, crankshaft pulley, by driving attachment wheel, first
Tight device belt wheel and the second stretcher belt wheel.By using belt solderless wrapped connection starting motor/generator belt wheel, crankshaft pulley, driven
Attachment wheel, the first stretcher belt wheel and the second stretcher belt wheel.Because FEAD system has different operating modes, converted in each mode
The elastic state of lower belt can also convert therewith.Automatic tensioner is as important component in FEAD system, main function
It is the stabilization for maintaining automatic tensioner both ends band section tension, increases the cornerite of attachment wheel, compensation belt is drawn due to tension or abrasion
The variation and decaying risen, compensates the swing of the tensioner arm as caused by engine speed fluctuations, so that belt generation is avoided to skid,
Noise and vibration, the transmission for improving system is horizontal, guarantees the normal work of system.
Current existing automatic tensioner mainly has frictional and fluid pressure type.Friction-type automatic regulating device uses damping piece
(helical spring) provides resistance when shrinking for pilled-in selvedge arm and saves bit by bit energy, to provide power when the extension of slack list arm and releasing energy,
Asymmetric damping is provided by the opposite sliding on damping piece and the surface being in contact with it for the tensioner arm under different working condition.
Frictional stretcher needs biggish installation space, while damping piece can be worn with the working time, lead to damping vibration attenuation,
And then lose effect.Hydraulic auto-tensioner be then by Repeated Compression inside oil liquid damping is generated by damping hole,
Its damping is long using the time compared with frictionally damping.But from generate damping during can generate biggish heat, it is right
The Hydraulic Elements (such as check valve) for generating damping have heat affecting.And flowing can make hydraulic member to oil liquid back and forth in Hydraulic Elements
Part generates abrasion, can make hydraulic component failures for a long time.The document of application number 201410462258.3 discloses a kind of engine
Accessory belt hydraulic tensioner uses wider hydraulic tensioner using current, which is divided into stretcher by cylinder
Interior exocoel, oil liquid stretcher compress and uphold during through between plunger and cylinder gap or check valve flow repeatedly
Damping is generated in inside and outside two chambers, due to using interior exocoel, the automatic tensioner radial dimension of the structure is larger, and oil
Liquid may unevenly cause the bias of plunger because of pressure when flowing out from the gap of plunger and cylinder, influence the use of stretcher
Service life.
Summary of the invention
In view of the deficiencies of the prior art, the technical issues of present invention intends to solve is to provide a kind of with gas-liquid power-increasing cylinder
Automatic tensioner.
The technical solution that the present invention solves the technical problem is to provide a kind of auto-tensioning with gas-liquid power-increasing cylinder
Device, it is characterised in that the stretcher includes mounting bracket and gas-liquid power-increasing cylinder；The gas-liquid power-increasing cylinder includes cylinder body, series connection boundary
Wall, oil storage tank, left part and right part；Cylinder body is fixed on the frame body of FEAD system by mounting bracket；The left part and right part pair
It is installed on cylinder interior with claiming；Series connection interface wall is fixed among cylinder body；There is through-hole, by left part and right part in interface wall of connecting
Connection；Symmetrically there are two oil storage tanks for installation on cylinder body；The oil storage tank includes oil storage tank tank body and oil storage tank piston；Left part with
The connection of first stretcher belt wheel, right part are connect with the second stretcher belt wheel；The left part is identical with the structure of right part, wraps
Include sealing buffer stopper, guide pad, piston rod, the cylinder piston of surging, cylinder barrel series connection interface wall, pneumatic piston and block；
The cylinder barrel series connection interface wall is mounted on cylinder interior, and left part is divided into liquid cylinder and pneumatic linear actuator；The sealing is slow
It rushes block and cylinder body is interference fitted, be installed on cylinder ends；The guide pad and cylinder body are interference fitted, and are close to sealing buffer stopper；Institute
The one end for stating piston rod passes through sealing buffer stopper and guide pad stretches out on the outside of cylinder body, and end is fixed with stretcher band wheel case, middle part
It is fixed with the cylinder piston of surging, passes through cylinder barrel series connection interface wall, the other end is fixed with pneumatic piston；The cylinder piston of surging, which is located at, surges
In cylinder, pneumatic piston is located in pneumatic linear actuator；The stretcher band wheel case is mounted on the first stretcher belt wheel by rolling bearing
Shaft end；The block is fixed in series connection interface wall；Pneumatic piston and block blind-mate simultaneously pre-tighten, pneumatic piston
It is moved along block；The oil storage tank tank body is fixed on cylinder body, and inside has oil storage tank piston, and oil storage tank is divided into oil storage tank
Sap cavity and oil storage tank plunger shaft；The liquid cylinder plunger shaft be surge the cylinder piston, cylinder barrel series connection interface wall and cylinder body formed chamber
Body；Pneumatic piston rod cavity is the cavity that pneumatic piston, cylinder barrel series connection interface wall and cylinder body are formed；Oil storage tank sap cavity passes through
Logical hydraulic fluid port is connected to liquid cylinder plunger shaft, and oil storage tank plunger shaft is connected to by blow vent with pneumatic piston rod cavity；Pneumatic linear actuator is living
Plug, series connection interface wall and cylinder body form pneumatic piston chamber, have gas in pneumatic piston chamber.
Compared with prior art, the beneficial effects of the invention are that:
1, this stretcher is inserted into gas buffer room compression air chamber's gas as main buffer damping by pneumatic piston, is somebody's turn to do
Damping substantially will not with using the time to decay, and compressed gas will not be flowed as oil liquid like that make operation element generate to wear,
Ensure that the steady operation of stretcher, on the whole can effective attenuation tensioner arm as caused by engine speed fluctuations pendulum
It is dynamic.
2, this stretcher has the mutually matched tensioner arm of symmetrical two energy, i.e. slack list arm and pilled-in selvedge arm.Work as FEAD
When system transformation working pattern, the belt tension state on starting motor/generator belt wheel both sides can change, and at this time described two
A tensioner arm can make corresponding movement according to the elastic state of belt automatically: the tensioner arm (i.e. pilled-in selvedge arm) at pilled-in selvedge belt
Compression is fixed, and the tensioner arm (i.e. slack list arm) at the belt of slack list stretches out tensioning.Belt will not be thus set to work because of FEAD system
Mode it is frequent variation and constantly extend, influence the normal operation of drive system.
3, the invention replaces existing helical spring using gas-liquid power-increasing cylinder.When pilled-in selvedge arm is shunk by included certain
The gentle dynamic the cylinder piston of the cylinder piston of surging of damping and the drag effect of the oil liquid and the gas in gas surge chamber that are extruded are come
It provides and damps and save bit by bit energy, can be expanded by gas extrusion when slack list arm is upheld and oil liquid reinforcement two ways provides power simultaneously
It releases energy.There will not be mechanical wear as helical spring its working time is too long.In addition when helical spring fails
When needing replacing, cylinder body can only be dismantled and replaced, it is time-consuming and laborious.And gas-liquid power-increasing cylinder may because of cannot be fully sealed and
So that the gas in cylinder body is gradually scattered and disappeared, but tonifying Qi, behaviour can be carried out by the working hole (being not drawn into figure) being arranged on cylinder body
It facilitates.
4, this stretcher can centainly damp the cylinder piston of surging gentle dynamic the cylinder piston and the oil liquid that is extruded by included
Biggish damping is provided for pilled-in selvedge arm with the drag effect of the gas in gas surge chamber, it is living with the included liquid cylinder centainly damped
The gas that is extruded in plug and pneumatic piston and pneumatic piston rod cavity provides lesser damping for slack list arm.Thus can
Suitable damping is provided for two tensioner arms under various motor modes, to reach the work of quickly tensioning and decaying belt vibration
Effectiveness.
5, this stretcher it is mountable with can reverse rotating electric generator or start motor/generator hybrid vehicle internal combustion
In the FEAD system of machine.Power and piston rod when the gas-liquid power-increasing cylinder is capable of providing piston rod tensioning need in different modes
Asymmetric damping, long service life.
Detailed description of the invention
Fig. 1 is the layout of FEAD system in the prior art；
Fig. 2 is the transmission agency figure of FEAD system in the generator mode in the prior art；
Fig. 3 is transmission agency figure of the FEAD system in the case where starting motor mode in the prior art；
Fig. 4 is the overall structure diagram of an embodiment of the present invention；
Fig. 5 is the structural schematic diagram of the pneumatic piston of an embodiment of the present invention；
Fig. 6 is the guide pad and sealing buffer stopper scheme of installation of an embodiment of the present invention；
In figure: 1, FEAD system；2, belt；3, crankshaft pulley；4, by driving attachment wheel；5, start motor/generator band
Wheel；6, the first stretcher belt wheel；7, the second stretcher belt wheel；8, mounting bracket；9, liquid cylinder rod end chamber；10, stretcher band
Wheel case；11, buffer stopper is sealed；12, guide pad；13, piston rod；14, liquid cylinder blow vent；15, liquid cylinder；16, liquid cylinder is living
Plug；17, lead to hydraulic fluid port；18, cylinder barrel series connection interface wall；19, oil liquid；20, oil storage tank tank body；21, oil storage tank piston；22, blow vent；
23, pneumatic linear actuator；24, pneumatic piston；25, gas buffer room；26, block；27, series connection interface wall；28, cylinder body；29, pneumatic linear actuator
Plunger shaft；30, pneumatic piston rod cavity；31, oil storage tank plunger shaft；32, oil storage tank sap cavity；33, liquid cylinder plunger shaft.
Specific embodiment
Specific embodiments of the present invention are given below.Specific embodiment is only used for that present invention be described in more detail, unlimited
The protection scope of the claim of this application processed.
FEAD system 1 (as shown in Figure 1) include belt 2, starting motor/generator belt wheel 5, crankshaft pulley 3, by drive it is attached
Part wheel 4, the first stretcher belt wheel 6 and the second stretcher belt wheel 7.By using 2 solderless wrapped connection of belt starting motor/generator belt wheel 5,
Crankshaft pulley 3, by driving attachment wheel 4, the first stretcher belt wheel 6 and the second stretcher belt wheel 7.
The automatic tensioner that the present invention provides a kind of with gas-liquid power-increasing cylinder (abbreviation stretcher, referring to fig. 4-6), it is special
Sign is that the stretcher includes mounting bracket 8 and gas-liquid power-increasing cylinder；The gas-liquid power-increasing cylinder includes cylinder body 28, series connection interface wall
27, oil storage tank, left part and right part；Cylinder body 28 is fixed on the frame body of FEAD system 1 by mounting bracket 8；Start motor/power generation
Machine belt wheel 5 is nested in inside cylinder body 28, and the two does not contact；The left part and right part are symmetrically installed on inside cylinder body 28；Cylinder body
Series connection interface wall 27 is fixedly installed among 28；There is through-hole in interface wall 27 of connecting, left part is connected to right part；On cylinder body 28
There are two oil storage tanks for symmetrically installation, are located on left part and right part same position；The oil storage tank includes oil storage tank
Tank body 20 and oil storage tank piston 21；Left part is connect with the first stretcher belt wheel 6, and right part is connect with the second stretcher belt wheel 7；It is described
Left part is identical with the structure of right part, includes sealing buffer stopper 11, guide pad 12, piston rod 13, the cylinder piston of surging 16, cylinder
Cylinder series connection interface wall 18, pneumatic piston 24 and block 26；
By taking left part as an example, the cylinder barrel series connection interface wall 18 is mounted on inside cylinder body 28, and left part is divided into 15 He of liquid cylinder
Pneumatic linear actuator 23；The sealing buffer stopper 11 is interference fitted with cylinder body 28, is installed on 28 end of cylinder body；The guide pad 12 and cylinder body
28 interference fits are close to sealing buffer stopper 11；Guide pad 12 be used for piston rod 13 carry out guide and limit, avoid piston rod 13 with
The contact of cylinder body 28；One end of the piston rod 13 passes through sealing buffer stopper 11 and guide pad 12 stretches out 28 outside of cylinder body, end
It is fixed with stretcher band wheel case 10, middle part is fixed with the cylinder piston 16 of surging, and passes through cylinder barrel series connection interface wall 18, the other end is fixed with
Pneumatic piston 24；The cylinder piston of surging 16 is located in liquid cylinder 15, and pneumatic piston 24 is located in pneumatic linear actuator 23；The stretcher
The shaft end of the first stretcher belt wheel 6 is mounted on by rolling bearing with wheel case 10, axially position is realized by nut；The block
26 are fixed in series connection interface wall 27；Pneumatic piston 24 and 26 blind-mate of block simultaneously pre-tighten, and pneumatic piston 24 is along gear
Block 26 moves；The oil storage tank tank body 20 is fixed on cylinder body 28, and inside has oil storage tank piston 21, and oil storage tank is divided into oil storage
Tank oil liquid chamber 32 and oil storage tank plunger shaft 31；The liquid cylinder plunger shaft 33 is surge the cylinder piston 16, cylinder barrel series connection interface wall 18
The cavity formed with cylinder body 28；Pneumatic piston rod cavity 30 is pneumatic piston 24, cylinder barrel series connection interface wall 18 and 28 shape of cylinder body
At cavity；Oil storage tank sap cavity 32 is connected to by logical hydraulic fluid port 17 with liquid cylinder plunger shaft 33, and oil storage tank plunger shaft 31 passes through logical
Port 22 is connected to pneumatic piston rod cavity 30；Pneumatic piston 24, series connection interface wall 27 and cylinder body 28 form pneumatic piston
Chamber 29 has gas in pneumatic piston chamber 29.
The cylinder piston of surging 16, guide pad 12 and cylinder body 28 form liquid cylinder rod end chamber 9.
Preferably, cylinder wall of the downside of liquid cylinder 15 by guide pad 12 as liquid cylinder 15, and close to this side cylinder
One liquid cylinder blow vent 14 being connected with the external world is set at body wall, it in this way will not be because by liquid cylinder when piston rod 13 is upheld
The damping action of compressed gas in rod end chamber 9 and influence be tensioned speed.
Even number (preferably two) block 26 is symmetrically distributed in the two sides of the through hole center line of series connection interface wall 27, will be pneumatic
The pneumatic piston chamber 29 that the cylinder piston 24, series connection interface wall 27 and cylinder body 28 are formed is divided into several independent gas buffer rooms 25,
For blind-mate pneumatic piston 24, pneumatic piston 24 is enable to move in gas buffer room 25.
Oil storage tank plunger shaft 31 is that have the space of dry gas, as gas capacity space and pneumatic piston rod cavity 30
Between carry out gas exchanges.Oil storage tank sap cavity 32 is the cavity with oil liquid 19, living as liquid capacity space and liquid cylinder
Fluid exchange is carried out between plug chamber 33.
Preferably, it is cased with self-lubricating bearing inside guide pad 12, piston rod 13 can be made to reduce frictional force, convenient for sliding.
Preferably, the sealing buffer stopper 11 is and stretcher band 10 end of wheel case with the end that wheel case 10 contacts with stretcher
The matched arc surface in face avoids stretcher from contacting with wheel case 10 with the direct of cylinder body 28；Sealing buffer stopper 11 is made of rubber,
The dynamics of shock can be slowed down, reduce system noise.
Preferably, the piston rod 13 is arc-shaped；Pneumatic piston 24 has several grooves, is used for block 26 continuously
Gap cooperation, number of recesses are identical as the quantity of block 26.The cylinder piston of surging 16 is common rectangle；The size of the cylinder piston of surging 16
Less than pneumatic piston 24, the specific size of pneumatic piston 24 is related with the volume of pneumatic linear actuator 23 and gas surge chamber 25, liquid
The specific size of dynamic the cylinder piston 16 is related with 15 volume of liquid cylinder.
Preferably, the cylinder body 28 is greater than the arc-shaped cylinder body of semicircle using cylinder body radian.
Preferably, the width of liquid cylinder 15 is less than pneumatic linear actuator 23, because liquid has Incoercibility, works as pneumatic piston
When gas in rod cavity 30 is arranged to oil storage tank plunger shaft 31,19 volume of oil liquid that is discharged in the gas volume and oil storage tank 20 that are discharged into
Relatively.If pneumatic linear actuator 23 and liquid cylinder 15 are of same size, the oil liquid 19 being discharged into liquid cylinder plunger shaft 33 is difficult to liquid
The cylinder piston 16 of surging in dynamic cylinder 15 makees thrust, so that reinforcement effect be not achieved.
Preferably, helical spring is passed through to the through-hole of series connection interface wall 27, the both ends pneumatic linear actuator with left part and right part respectively
Piston 24 connects.Helical spring energy mate-assist gas-liquid power-increasing cylinder provides resistance for piston rod contraction, provides for piston rod extension
Power-assisted, and the decrement of helical spring and stretch amount can be made to reduce in the case where gas-liquid force increasing cylinder working, extend spring
Service life.
Preferably, the center of circle for starting motor/generator belt wheel 5 is overlapped (referring to fig. 4) with the center of this stretcher.
The working principle of the invention and workflow are:
When FEAD system 1 is in starting motor mode (referring to Fig. 3), starting motor/generator belt wheel 5, which is in, at this time is opened
Dynamic electrical machine belt pulley state, becomes driving wheel, and rotation direction is (the present embodiment is clockwise) clockwise.Belt 2 is in driving wheel 5
It drives lower rotation, crankshaft pulley 3 and is rotated clockwise as driven wheel by driving attachment wheel 4.Second stretcher band at this time
Belt where wheel 7 fluffs, and stretcher extension is needed to be tensioned to compress belt；Belt where first stretcher belt wheel 6
Become tight and be oppressed, the piston rod 13 of left part is compressed, and left part is pilled-in selvedge arm at this time.It is present in liquid cylinder plunger shaft 33 at this time
Oil liquid 19 be pressurized and oil storage tank sap cavity 32 flowed to by logical hydraulic fluid port 17, therefore 32 volume of oil storage tank sap cavity expands to push away
Dynamic oil storage tank piston 21 is mobile by 32 expansion direction of oil storage tank sap cavity, and squeezes the gas in oil storage tank plunger shaft 31 by leading to
22 row of port is to pneumatic piston rod cavity 30.Leakproofness prevents oil liquid 19 from by the cylinder piston 16 of surging, gas cannot pass through
Pneumatic piston 24.It will receive included surge the cylinder piston 16 and the pneumatic piston centainly damped in 13 contraction process of piston rod
24 and the oil liquid 19 and the gas in gas surge chamber 25 that are extruded drag effect, piston rod 13 shrink it is slack-off, thus right
The vibration of stretcher decays.At this point, the belt 2 at the second stretcher belt wheel 7 is slack list at this time, right part is slack list arm, is needed
Wanting piston rod 13 to uphold drives the second stretcher belt wheel 7 to be tensioned.Because of the contraction of the piston rod 13 of left part, it is present in left part
Gas in pneumatic piston chamber 29 is pressurized and is entered in the pneumatic piston chamber 29 of right part by the through-hole for interface wall 27 of connecting,
To push the piston rod 13 of right part to uphold outward.The gas in pneumatic piston rod cavity 30 is living to oil storage tank by compression row at this time
Chamber 31 is filled in, and then the oil liquid 19 for pushing oil storage tank piston 21 to squeeze in oil storage tank sap cavity 32 flows to liquid cylinder plunger shaft 33.Oil
It is that piston rod 13 provides reinforcement that liquid 19, which squeezes the cylinder piston 16 of surging, accelerates the extension speed of piston rod 13, right part is made to reach quick
The purpose of tightening belt.
(referring to fig. 2) when FEAD system 1 is in generator mode, crankshaft pulley 3 is driving wheel at this time, and rotation direction is
(the present embodiment is clockwise) clockwise, starting motor/generator belt wheel 5 are now in generator belt wheel state.In belt 2
Under drive, rotated clockwise as driven wheel by driving attachment wheel 4 and starting motor/generator belt wheel 5, first at this time
Belt where tight device belt wheel 6 fluffs, and stretcher extension is needed to be tensioned to compress belt；Where second stretcher belt wheel 7
Belt become tight and be oppressed, the piston rod 13 of right part is compressed, and right part is pilled-in selvedge arm at this time.It is present in the cylinder piston of surging at this time
Oil liquid 19 in chamber 33 is pressurized and flows to oil storage tank sap cavity 32 by logical hydraulic fluid port 17, therefore 32 volume of oil storage tank sap cavity expands
It is mobile by 32 expansion direction of oil storage tank sap cavity to push oil storage tank piston 21, and squeeze the gas in oil storage tank plunger shaft 31
By 22 row of blow vent to pneumatic piston rod cavity 30.Leakproofness prevents oil liquid 19 from by the cylinder piston 16 of surging, gas is not
Pneumatic piston 24 can be passed through.It will receive the included the cylinder piston 16 and pneumatic of surging centainly damped in 13 contraction process of piston rod
The drag effect of the cylinder piston 24 and the oil liquid 19 being extruded and the gas in gas surge chamber 25, piston rod 13 shrink it is slack-off,
To decay to the vibration of stretcher.At this point for stretcher left part, the belt 2 at the first stretcher belt wheel 6 is at this time
Slack list, left part are slack list arm, need piston rod 13 to uphold and the first stretcher belt wheel 6 is driven to be tensioned.Because of the piston rod of right part
13 contraction, the gas being present in the pneumatic piston chamber 29 of right part are pressurized and enter a left side by the through-hole for interface wall 27 of connecting
In the pneumatic piston chamber 29 in portion, so that the piston rod 13 of left part be pushed to uphold outward.At this time in pneumatic piston rod cavity 30
Gas is arranged by compression to oil storage tank plunger shaft 31, and then oil storage tank piston 21 is pushed to squeeze the oil liquid 19 in oil storage tank sap cavity 32
Flow to liquid cylinder plunger shaft 33.It is that piston rod 13 provides reinforcement that oil liquid 19, which squeezes the cylinder piston 16 of surging, accelerates stretching for piston rod 13
Zhang Sudu makes left part achieve the purpose that quick tightening belt.
Because occurring also will appear slack list while pilled-in selvedge under each operating mode of FEAD system, the stretcher is left
The course of work of portion and right part is corresponding opposite.Such as when the piston rod 13 of left part is shunk, the piston rod of corresponding right part
13 be to uphold.
The present invention does not address place and is suitable for the prior art.
Claims (10)
1. a kind of automatic tensioner with gas-liquid power-increasing cylinder, it is characterised in that the stretcher includes mounting bracket and gas-liquid force increasing
Cylinder；The gas-liquid power-increasing cylinder includes cylinder body, series connection interface wall, oil storage tank, left part and right part；Cylinder body is fixed on by mounting bracket
On the frame body of FEAD system；The left part and right part are symmetrically installed on cylinder interior；Series connection interface wall is fixed among cylinder body；
There is through-hole in interface wall of connecting, left part is connected to right part；Symmetrically there are two oil storage tanks for installation on cylinder body；The oil storage tank
Including oil storage tank tank body and oil storage tank piston；Left part is connect with the first stretcher belt wheel, and right part is connect with the second stretcher belt wheel；
The left part is identical with the structure of right part, includes sealing buffer stopper, guide pad, piston rod, the cylinder piston of surging, cylinder barrel string
Join interface wall, pneumatic piston and block；
The cylinder barrel series connection interface wall is mounted on cylinder interior, and left part is divided into liquid cylinder and pneumatic linear actuator；The sealing buffer stopper
It is interference fitted with cylinder body, is installed on cylinder ends；The guide pad and cylinder body are interference fitted, and are close to sealing buffer stopper；The work
One end of stopper rod passes through sealing buffer stopper and guide pad stretches out on the outside of cylinder body, and end is fixed with stretcher band wheel case, and middle part is fixed
There is the cylinder piston of surging, pass through cylinder barrel series connection interface wall, the other end is fixed with pneumatic piston；The cylinder piston of surging is located at liquid cylinder
In, pneumatic piston is located in pneumatic linear actuator；The stretcher is mounted on the first stretcher belt wheel by rolling bearing with wheel case
Shaft end；The block is fixed in series connection interface wall；Pneumatic piston and block blind-mate simultaneously pre-tighten, pneumatic piston edge
Block movement；The oil storage tank tank body is fixed on cylinder body, and inside has oil storage tank piston, and oil storage tank is divided into oil storage tank oil liquid
Chamber and oil storage tank plunger shaft；The liquid cylinder plunger shaft be surge the cylinder piston, cylinder barrel series connection interface wall and cylinder body formed cavity；
Pneumatic piston rod cavity is the cavity that pneumatic piston, cylinder barrel series connection interface wall and cylinder body are formed；Oil storage tank sap cavity passes through logical
Hydraulic fluid port is connected to liquid cylinder plunger shaft, and oil storage tank plunger shaft is connected to by blow vent with pneumatic piston rod cavity；Pneumatic piston,
Interface wall of connecting and cylinder body form pneumatic piston chamber, have gas in pneumatic piston chamber.
2. the automatic tensioner according to claim 1 with gas-liquid power-increasing cylinder, it is characterised in that the cylinder piston of surging, guiding
Block and cylinder body form liquid cylinder rod end chamber.
3. the automatic tensioner according to claim 2 with gas-liquid power-increasing cylinder, it is characterised in that the downside of liquid cylinder by
Cylinder wall of the guide pad as liquid cylinder, and in the setting one liquid cylinder ventilation being connected with the external world at this side cylinder wall
Mouthful, when piston rod is upheld will not in by liquid cylinder rod end chamber the damping action of compressed gas due to influenced to be tensioned speed.
4. the automatic tensioner according to claim 1 with gas-liquid power-increasing cylinder, it is characterised in that even number block is symmetrical
The two sides of the through hole center line of series connection interface wall are distributed in, pneumatic piston chamber is divided into several independent gas buffer rooms, are used
In blind-mate pneumatic piston, enable pneumatic piston in gas buffer indoor sport.
5. the automatic tensioner according to claim 1 with gas-liquid power-increasing cylinder, it is characterised in that oil storage tank plunger shaft is
Space with dry gas, as carrying out gas exchanges between gas capacity space and pneumatic piston rod cavity；Oil storage tank
Sap cavity is the cavity with oil liquid, as carrying out fluid exchange between liquid capacity space and liquid cylinder plunger shaft.
6. the automatic tensioner according to claim 1 with gas-liquid power-increasing cylinder, it is characterised in that be cased with inside guide pad
Self-lubricating bearing can make piston rod reduce frictional force, convenient for sliding.
7. the automatic tensioner according to claim 1 with gas-liquid power-increasing cylinder, it is characterised in that the sealing buffer stopper
The end contacted with stretcher belt wheel set is to avoid stretcher band wheel case and cylinder with the matched arc surface in wheel case end face with stretcher
The direct contact of body；Sealing buffer stopper is made of rubber.
8. the automatic tensioner according to claim 1 with gas-liquid power-increasing cylinder, it is characterised in that preferably, the piston
Bar is arc-shaped；Pneumatic piston has several grooves, is used for and block blind-mate, the quantity phase of number of recesses and block
Together；The size for the cylinder piston of surging is less than pneumatic piston.
9. the automatic tensioner according to claim 1 with gas-liquid power-increasing cylinder, it is characterised in that the width of liquid cylinder is small
In pneumatic linear actuator.
10. the automatic tensioner according to claim 1 with gas-liquid power-increasing cylinder, it is characterised in that pass through helical spring
The through-hole for interface wall of connecting, both ends are connect with the pneumatic piston of left part and right part respectively.
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| CN201910170182.XA CN109695677B (en) | 2019-03-07 | 2019-03-07 | Automatic tensioner with gas-liquid reinforcement cylinder |
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|---|---|---|---|
| CN201910170182.XA CN109695677B (en) | 2019-03-07 | 2019-03-07 | Automatic tensioner with gas-liquid reinforcement cylinder |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| CN109695677B (en) | 2023-12-05 |
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