CN104358846B

CN104358846B - Drum-type asymmetric damping automatic belt tightener

Info

Publication number: CN104358846B
Application number: CN201410557008.8A
Authority: CN
Inventors: 陈炳顺; 周华强
Original assignee: Hangzhou Sincere Automobile Bearing Co Ltd
Current assignee: Hangzhou Sincere Automobile Bearing Co Ltd
Priority date: 2014-10-20
Filing date: 2014-10-20
Publication date: 2017-03-01
Anticipated expiration: 2034-10-20
Also published as: CN104358846A

Abstract

The invention discloses a kind of drum-type asymmetric damping automatic belt tightener, belong to tensioner apparatus, existing damping is unstable, the torsionspring lost of life；The present invention passes through to arrange damping member between inner peripheral surface and outer peripheral face, the spring tongue of damping member there is directivity so that the damping force that produces of each damping friction block and inner peripheral surface or outer peripheral face in tensioner arm to a direction（It is loaded direction）Greatly, in tensioner arm to another direction during swing（Unloaded direction）Little during swing, thus realizing the asymmetry damping when loading and unloading.The stretcher of the present invention provides the radial tension of damping to be provided by single flexible member, anglec of rotation when damping the original Form and position error of size and asymmetry and torsionspring and working is unrelated, thus overcome prior art borrow torsionspring in the course of the work the swell of mean diameter of coil or reduce indirect control damping friction block move radially caused by defect, increase the stability of damping, extend the life-span of torsionspring.

Description

Drum-type asymmetric damping automatic belt tightener

Technical field

The present invention relates to a kind of tensioner apparatus, more particularly, to a kind of belt stretcher of asymmetric damping mechanism, should Damping unit different circumference direction of rotation have the characteristics that damping different, allow tensioner arm loaded in tension when moment of torsion and unloading Moment of torsion when lax, thus realize reducing mechanism's shake, the effect of prolongation lifetime of system.

Background technology

Existing damping automatic belt tightener technology, extreme portions are all also symmetrically to damp stretcher；This technology is difficult to When comprehensively solve starts or accelerates suddenly, belt can jump the problem of tooth；In addition, it is undesirable to the vibrating effect of the slow system of solution.

The technical scheme that existing patent documentation CN102741588A, CN102472373A, CN103174807A disclose, structure Complexity, the squeezed air-damping piece mainly by external diameter swell during torsionspring unwinding is bigger with tensioner arm or the generation of pedestal internal diameter Pressure is thus produce bigger damping friction, because torsionspring external diameter and the torsionspring two ends angle accuracy of manufacture are difficult to handle Control, error are very big, and the damping size for this this structure and the realization of asymmetry are difficult to stablize, and effect is not ideal.

There is just contrary with said structure scheme, it is in the inner surface of torsionspring and tensioner arm in existing application Between outer surface, a wear-resistant sleeve is set, this is wear-resisting to be cased with a sleeve body and shirt rim, and the end of torsion spring press against the skirt of wear-resistant sleeve Side, allows wear-resistant sleeve and pedestal not rotate motion, and when in torsion spring, receipts tighten, the internal diameter of torsion spring reduces, thus holding tightly wear-resisting Set, realizes the damping due to rotation that tensioner arm is with respect to wear-resistant sleeve.The advantage of this technology is that structure is simple, and shortcoming is and above-mentioned technical side Case is the same, and the angle precision at torsion spring internal diameter and torsion spring two ends is difficult to control, the damping size for this this structure and asymmetry Stability be difficult to stable, effect is also undesirable.

Above two technology, common feature is to borrow the torsionspring swell of mean diameter of coil or reduce in the course of the work Carry out indirect control damping friction block to move radially, the angle error at the initial error of mean diameter of coil and torsionspring two ends, all incite somebody to action The damping size leading to a collection of product differs greatly.The micro abrasion of damping friction block, and will lead to damp huge change；Just For a certain corner of the operation interval of stretching wheel assembly, no matter being now loading direction or uninstall direction, torsionspring pair The holding degree of wear-resistant sleeve is certain that is to say, that for certain point, loading direction is the same with the damping of uninstall direction 's.In addition, with the increase loading, the windup-degree of torsionspring increases, and torsionspring almost loses near several circles of wear-resistant sleeve Go to reverse effect that bullet becomes, reduced the life-span of torsionspring.Common result is that damping is unstable, and the torsionspring life-span contracts Short.

Content of the invention

The technical problem to be solved in the present invention and the technical assignment proposing are to overcome prior art damping unstable, reverse bullet The defects such as the spring lost of life, provide a kind of drum-type asymmetric damping automatic belt tightener.

For reaching above-mentioned purpose, the drum-type asymmetric damping automatic belt tightener of the present invention, it is characterized in that including：

There is the pedestal of mandrel；

Tensioner arm, it is assemblied on described mandrel and can swing with respect to pedestal around described mandrel, described pedestal with Relatively turnable inner peripheral surface, outer peripheral face are set up on tight arm separately, the diameter of described outer peripheral face is less than the diameter of described inner peripheral surface；

Torsionspring, it applies the elastic force to the deflection of belt tension direction to described tensioner arm；

Belt wheel, it is assemblied on described tensioner arm；

Damping member, it is in circular and is located between described outer peripheral face and inner peripheral surface, and this damping member includes elasticity unit Part and some damping friction blocks, described flexible member includes the elastic matrix of ring-type and some springs providing lasting radical elasticity Tongue, described spring tongue from described elastic matrix to radially extending and to peripheral, oblique, on described spring tongue The described damping friction block of configuration, described damping friction block by the elastic force pressure holding of described spring tongue in described inner peripheral surface or On person's outer peripheral face, when the incline direction of described spring tongue makes tensioner arm rotate with respect to pedestal or when having rotation trend, institute The damping force that the damping friction block stated is produced with described inner peripheral surface or outer peripheral face swings to a direction in described tensioner arm When or have during swing trend big, when described tensioner arm swings in the other direction or have little during swing trend.

As optimization technique means, inner peripheral surface on described tensioner arm, described for the described outer peripheral face is located at described Pedestal on, or described outer peripheral face is located on described pedestal, described inner peripheral surface is located on described tensioner arm.

As optimization technique means, with respect to described outer peripheral face fixing assembling, each is described for described elastic matrix Spring tongue extends to the outside of described elastic matrix and by corresponding damping friction block pressure holding on described inner peripheral surface, each The incline direction of described spring tongue is identical.

As optimization technique means, with respect to described inner peripheral surface fixing assembling, each is described for described elastic matrix Spring tongue extends to the inner side of described elastic matrix and by corresponding damping friction block pressure holding on described outer peripheral face, each The incline direction of described spring tongue is identical.

As optimization technique means, described elastic matrix rotatably assembles with respect to described outer peripheral face, inner peripheral surface, and one Partly described spring tongue extends to the outside of described elastic matrix and by corresponding damping friction block pressure holding in described On side face, the spring tongue described in another part extends to the inner side of described elastic matrix and by corresponding damping friction block pressure holding On described outer peripheral face, extend to the incline direction of spring tongue in outside of described elastic matrix and extend to described elasticity The incline direction of the spring tongue of the inner side of matrix is contrary.

As optimization technique means, described spring tongue is from the edge of described elastic matrix or/and pars intermedia Position punching deformation forms.

As optimization technique means, described damping friction block includes skeleton and the friction piece forming an entirety, described Skeleton be provided with the interior concave space being absorbed in for described spring tongue.

As optimization technique means, each described damping friction block has the radian with described inner peripheral surface or outer peripheral face Adaptable rubbing surface.

As optimization technique means, one end of described torsionspring is supported on described pedestal or is fixed with described pedestal Component on, the other end is supported on described tensioner arm or on the component fixing with described tensioner arm.

As optimization technique means, described pedestal includes body and is attached to attachment on body or/and from body On the ennation that extends；Described tensioner arm includes body and the attachment being attached on body or/and extends from body The ennation going out.

As optimization technique means, described damping friction block contacts the system of friction part with described inner peripheral surface or outer peripheral face Producing material material is high heat-resisting thermoplastic.

As optimization technique means, the heat-resisting thermoplastic of described height is to add in any one basic material following Any one additive following form, described basic material include polyamide 46, polyamide 66, polyamide 6, poly- paraphenylene terephthalamide oneself Diamidogen, polyphthalamide, polyether-ether-ketone, polyphenylene sulfide, described additive includes the glass fibre of 20%-60%, 20%-60% Carbon fibre, the aramid fiber of 20%-60%, the phenolic fibre of 20%-60%, described percentage composition is that additive is manufacturing material Mass percent in material.

The flexible member of the present invention, its spring tongue has directivity, when belt is tightened and tensioner arm is loaded, forces and opens Tight arm swings to the opposite direction of tension direction or has swing trend, and damping friction block is not only opened by the original radial direction of spring tongue Power and produce frictional damping, but also be subject to the radial component of the supporting force in spring-latch head tilt direction, this component increased again Hinder the damping of tensioner arm；When belt slack unloads from tensioner arm, tensioner arm then swings to tension direction or has swing to become Gesture, damping friction block is only subject to the tension force also less than the original radial tension of spring tongue to produce frictional damping；Thus realizing adding The asymmetry damping when carrying and unloading.

The stretcher of the present invention provides the radial tension of damping to be provided by single flexible member, damping size and asymmetric Property unrelated with anglec of rotation when the original Form and position error of torsionspring and work, thus overcoming prior art to borrow torsionspring In the course of the work the swell of mean diameter of coil or reduce indirect control damping friction block move radially caused by defect, increase resistance The stability of Buddhist nun, extends the life-span of torsionspring.

Brief description

Fig. 1 is a kind of cross-sectional schematic of structure of stretcher of the present invention；

Fig. 2 is the K-K of damping member shown in Fig. 1 to cross-sectional schematic；

Fig. 3 is the cross-sectional schematic of another kind of damping member；

Fig. 4 is the structural representation for being fitted in the damping friction block on the spring tongue extending to outside elastic matrix Figure；

Fig. 5 is the structural representation for being fitted in the damping friction block on the spring tongue extending to inside elastic matrix Figure；

Fig. 6 A-6F is six kinds of structural representations of the elastic matrix that each spring tongue all extends to outside；

Fig. 7 A-7F is six kinds of structural representations of the elastic matrix that each spring tongue all extends to inner side；

Fig. 8 A-8F be partial spring tongue extend to inner side, another part spring tongue extend to inner side elastic matrix Seven kinds of structural representations；

Fig. 9 A-9C show spring tongue of the present invention respectively static, forward rotate, backwards rotation when stress diagram (in figure elastic matrix is represented with flat)；

In figure label declaration：

01- pedestal,

11- inner peripheral surface, 12- bushing；

02- tensioner arm,

21- outer peripheral face；

03- mandrel；

04- torsionspring；

05- belt wheel；

06- damping member, 06A- damping member,

61- flexible member, 61A- flexible member,

611- elastic matrix, 611a- elastic matrix,

612- spring tongue, 612a- spring tongue,

62- damping friction block, 62A- damping friction block,

621- skeleton, 621a- skeleton,

Concave space in 6211-, concave space in 6211a-,

622- friction piece, 622a- friction piece.

Specific embodiment

Below in conjunction with Figure of description, the present invention will be further described.

The drum-type asymmetric damping automatic belt tightener of the present invention can first pass through the preferred embodiment shown in Fig. 1 and give Illustrate, the stretcher shown in Fig. 1 includes：

There is the pedestal 01 of mandrel 03（Diagram mandrel 03 and pedestal 01 are in Split type structure, are connected as a single entity by die casting, actual It is also possible to the two is made as by one by the machining mode such as punching press, riveting during enforcement；Die casting, cast etc. can also be passed through The two is formed integrally structure by mode）；

Tensioner arm 02）, its tubular portion is assemblied on mandrel 03 and can swing with respect to pedestal 01 around mandrel 03, pedestal 01 With inner peripheral surface 11, outer peripheral face 21 set up separately on tensioner arm 02, the diameter of outer peripheral face 21 is less than the diameter of inner peripheral surface 11；

Torsionspring 04, it applies the elastic force deflecting to tension direction (direction of lax torsionspring) to tensioner arm 02；

Belt wheel 05, its assembling（As by bearing pin and bearing）On tensioner arm 02；

Damping member 06, it is in circular, and it is located between outer peripheral face 21 and inner peripheral surface 11, and this damping member 06 includes one Flexible member 61 (can be the elastic original paper that two or more are set up in parallel when being embodied as) and some damping friction Block 62, flexible member 61 includes the elastic matrix 611 of ring-type and some spring tongues 612 providing lasting radical elasticity, spring Tongue 612 from elastic matrix 611 to radially extending and to peripheral, oblique, configuration damping friction block 62 (ginseng on spring tongue 612 See Fig. 4, in figure is one damping friction block 62 of configuration on each spring tongue 612), damping friction block 62 is by spring tongue 612 Elastic force pressure holding on inner peripheral surface 11 or outer peripheral face 21, the incline direction of spring tongue 612 makes tensioner arm with respect to pedestal During rotation or when having rotation trend, damping force that damping friction block 62 is produced with inner peripheral surface or outer peripheral face is in tensioner arm 02 to one Individual direction (general, be belt to the loading direction of tensioner arm, the direction tightening torsionspring, tensioner arm tension direction Opposite direction) when swinging or swing big during trend, tensioner arm to another direction (general, be the unloading to tensioner arm for the belt Direction, the direction of lax torsionspring, the tension direction of tensioner arm) when swinging or swing little during trend, realize tensioner arm 02 phase The damping that both direction when rotating for pedestal 01 is subject to is asymmetrical.Can also be by a damping friction when being embodied as Block fits on two or more spring tongue.

The realization of this asymmetric damping is the incline direction based on spring tongue, when belt is tightened and tensioner arm is loaded, Force the opposite direction to tension direction for the tensioner arm（Tighten the direction of torsionspring, with respect to the tensioner arm in Fig. 1 around mandrel to Swing on rear side of paper）Swing or have swing trend, and promote flexible member in Fig. 2 rotationally clockwise or rotation trend, Damping friction block is not only subject to the original radial tension of spring tongue to produce frictional damping, but also is subject to spring-latch head tilt The radial component of the supporting force in direction, this component increased the damping hindering tensioner arm again；When belt slack is unloaded from tensioner arm During load, tensioner arm is then to tension direction（The i.e. direction of lax torsionspring, with respect to the tensioner arm in Fig. 1 around mandrel to paper Front side swings）Swing or have swing trend, and promote the flexible member rotate in an anti-clockwise direction in Fig. 2 or rotation trend, damping Brake pad is only subject to the tension force also less than the original radial tension of spring tongue to produce frictional damping；Thus realizing belt to tensioning The asymmetry that arm damps when loading and unloading.

Spring tongue is static, forward rotate, backwards rotation when stress illustrated in Fig. 9 A-9C respectively：See Fig. 9 A, When tensioner arm is motionless, the spring tongue 612 of flexible member 61 is in radial compression, and spring tongue 612 gives damping friction block One radical elasticity, is also subject to an an equal amount of counteracting force Q simultaneously；See Fig. 9 B, when by forward（In figure dotted arrow The direction representing, dextrad）Rotation when, spring tongue is N to the radial pressure of damping friction block, spring tongue 612 be subject to N*f Frictional force（F is coefficient of friction）；See Fig. 9 C, reverse when being subject to（The direction that in figure dotted arrow represents, left-hand）Rotation when, Spring tongue is P to the radial pressure of damping friction block, and spring tongue 612 is subject to the frictional force of P*f（F is coefficient of friction）, warp Mechanical analyses are it was determined that P>Q>N, frictional force P*f during backwards rotation is more than frictional force N*f when forward rotating, and realizes not With the asymmetry turning to.

Described damping member 06A can also be shown in Fig. 3, when belt is tightened and promotes the flexible member 61A up time in Fig. 3 Pin direction rotates or rotates trend, and damping friction block 62A is not only subject to the original radial tension of spring tongue 612a to produce and rub Wipe damping, but also be subject to the radial component of the supporting force of spring tongue 612a incline direction, this component increased obstruction again The damping of tight arm；When belt slack and promote the flexible member rotate in an anti-clockwise direction in Fig. 3 or rotation trend, damping friction block Only it is subject to the tension force also less than the original radial tension of spring tongue to produce frictional damping；Thus realize belt loading to tensioner arm With the asymmetry damping during unloading.

In view of the enlightenment that Fig. 2 gives, with respect to outer peripheral face, (outer peripheral face shown in Fig. 1 is located at tensioner arm 02 to elastic matrix 611 On) fixing assembling, each spring tongue 612 extends to the outside of elastic matrix 611 and by the pressure holding of corresponding damping friction block 62 On inner peripheral surface 11 (diagram inner peripheral surface is located on pedestal), the incline direction of each spring tongue identical (to clockwise shown in Fig. 2 Direction tilts).The concrete structure of therefore flexible member can be the various structures shown in Fig. 6 A-6F, in Fig. 6 A-6F, uses word Female A represents elastic matrix, represents spring tongue with letter b.

In view of the enlightenment that Fig. 3 gives, elastic matrix also can be with respect to inner peripheral surface fixing assembling, and each spring tongue extends to The inner side of elastic matrix and by corresponding damping friction block pressure holding on outer peripheral face, the incline direction of each spring tongue is identical. The concrete structure of therefore flexible member can be the various structures shown in Fig. 7 A-7F, in Fig. 7 A-7F, represents elasticity with alphabetical A Matrix, represents spring tongue with letter C.

In view of the enlightenment that Fig. 2, Fig. 3 give, elastic matrix also rotatably can assemble with respect to outer peripheral face, inner peripheral surface, one Spring tongue is divided to extend to the outside of elastic matrix and by corresponding damping friction block pressure holding on inner peripheral surface, another part spring Tongue extends to the inner side of elastic matrix and by corresponding damping friction block pressure holding on outer peripheral face, extends to the outer of elastic matrix The incline direction of spring tongue of side is contrary with the incline direction of the spring tongue of the inner side extending to elastic matrix, so that When tensioner arm produces to a direction and swings or swing trend, damping friction block is not only subject to spring tongue to all spring tongues Original radial tension and produce frictional damping, but also be subject to spring-latch head tilt direction supporting force radial component, should Component increased the damping hindering tensioner arm again；All spring tongues produce to another direction in tensioner arm and swing or swing During gesture, damping friction block is only subject to the tension force also less than the original radial tension of spring tongue to produce frictional damping；Thus realizing The asymmetry that belt damps when tensioner arm being loaded and unloading.The concrete structure of therefore flexible member can be Fig. 8 A-8F institute The various structures shown, in Fig. 8 A-8F, represent elastic matrix with alphabetical A, represent the spring tongue stretching out with alphabetical D, use Letter e represents the spring tongue extending internally.

Although, outer peripheral face 21 shown in Fig. 1 is located on tensioner arm 02, inner peripheral surface 11 is located on pedestal 01, does not repel Outer peripheral face is located on pedestal, inner peripheral surface is located on tensioner arm.Regardless of the position of outer peripheral face, inner peripheral surface, according to described previously, all The structure of damping member and its incline direction of spring tongue can be determined by force analysis, thus belt is realized by assembling The asymmetry damping when tensioner arm being loaded and unloading.

In order to make damping member tend to more preferably designing in structure, spring tongue is the edge from elastic matrix Or/and middle part punching deformation forms, specifically：

Spring tongue shown in Fig. 6 A is to form in the two edges outside Side Cuttings deformation of elastic matrix, is distributed in The spring tongue of two edges is in symmetrical side by side in circumferencial direction；

Spring tongue shown in Fig. 6 B is to form in the outside Side Cutting in the middle part of elastic matrix deformation；

Spring tongue shown in Fig. 6 C is to form in the two edges outside Side Cuttings deformation of elastic matrix, is distributed in The spring tongue of two edges misplaces in circumferencial direction；

Spring tongue shown in Fig. 6 D is to form in an edge outside Side Cutting deformation of elastic matrix；

Spring tongue shown in Fig. 6 E is on the basis of structure shown in Fig. 6 B, and an edge in elastic matrix Positioning when setting breach is used for assembling, this breach may be equally applicable to the flexible member of other structures；

Spring tongue shown in Fig. 6 F is on the basis of structure shown in Fig. 6 D, and another edge part in elastic matrix Positioning when position setting breach is used for assembling, this breach may be equally applicable to the flexible member of other structures；

Spring tongue shown in Fig. 7 A is to form in the inside side blow shear deformation in two edges of elastic matrix, is distributed in The spring tongue of two edges is in symmetrical side by side in circumferencial direction；

Spring tongue shown in Fig. 7 B is to form in the inside side blow shear deformation in an edge of elastic matrix；

Spring tongue shown in Fig. 7 C is to form in the inside side blow shear deformation of the middle part of elastic matrix；

Spring tongue shown in Fig. 7 D is to form in the inside side blow shear deformation in two edges of elastic matrix, is distributed in The spring tongue of two edges misplaces in circumferencial direction；

Spring tongue shown in Fig. 7 E is on the basis of structure shown in Fig. 7 B, and another edge part in elastic matrix Positioning when position setting breach is used for assembling, this breach may be equally applicable to the flexible member of other structures；

Spring tongue shown in Fig. 7 F is on the basis of structure shown in Fig. 7 C, and an edge in elastic matrix Positioning when setting breach is used for assembling, this breach may be equally applicable to the flexible member of other structures；

Spring tongue shown in Fig. 8 A, a part be two edges outside Side Cuttings deformation in elastic matrix and Become, and to be distributed in the spring tongue of two edges in circumferencial direction be in symmetrical side by side；Another part is in elasticity The middle part inside side blow shear deformation of matrix forms；Two parts spring tongue misplaces in circumferencial direction and incline direction is contrary；

Spring tongue shown in Fig. 8 B, a part be the inside side blow shear deformation in two edges in elastic matrix and Become, and to be distributed in the spring tongue of two edges in circumferencial direction be in symmetrical side by side；Another part is in elasticity The middle part outside Side Cutting deformation of matrix forms；Two parts spring tongue misplaces in circumferencial direction and incline direction is contrary；

Spring tongue shown in Fig. 8 C, is all to form in the punching deformation of the middle part of elastic matrix, a part is laterally Extend, a part extends to inner side；Two parts spring tongue is spaced one by one in circumferencial direction and incline direction is contrary；

Spring tongue shown in Fig. 8 D, a part be an edge outside Side Cutting deformation in elastic matrix and Become, another part is to form in another edge inside side blow shear deformation of elastic matrix, two parts spring-latch head tilt In opposite direction；

Spring tongue shown in Fig. 8 E, a part be the inside side blow shear deformation in an edge in elastic matrix and Become, another part is to form in the outside Side Cutting in the middle part of elastic matrix deformation, two parts spring-latch head tilt direction phase Instead；

Spring tongue shown in Fig. 8 F, a part be the inside side blow shear deformation in an edge in elastic matrix and Become, another part is to form in another edge outside Side Cutting deformation of elastic matrix, two parts spring-latch head tilt Direction is identical.

In order to avoid stress deformation when damping friction block produces resistance, and ensure its friction area, damping shown in Fig. 4 rubs Cleaning block 62 includes skeleton 621 and the friction piece 622 forming an entirety, and skeleton 621 is provided with the indent being absorbed in for spring-latch head Space 6211, during manufacture, skeleton and friction piece can be entrenched togather；Similar structure also has expression in Figure 5.

In order to ensure friction area, each damping friction block has adaptable the rubbing of radian with inner peripheral surface or outer peripheral face Wiping face, thus, can make the friction surface of the damping friction block inside elastic matrix be located on the same face of cylinder, elastic matrix The friction surface of the damping friction block in outside also is located on the same face of cylinder.

During concrete assembling, one end of torsionspring 04 is supported on pedestal 01 or on the component fixing with pedestal, the other end It is supported on tensioner arm 02 or on the component fixing with tensioner arm, tensile force can be produced after pretension.

When being embodied as, according to the needs in structure, pedestal 01 may include body and be attached to attachment on body or/ With the ennation extending on body（As in Fig. 1, pedestal includes a bushing 12, inner peripheral surface 11 is formed on bushing 12）；? Tight arm may also comprise body and the attachment being attached on body or/and the ennation extending from body.

And the manufacture material that damping friction block contacts friction part with inner peripheral surface or outer peripheral face is high heat-resisting thermoplasticity Plastics, specifically, high heat-resisting thermoplastic be add any one additive following in any one basic material following and Become, described basic material includes polyamide 46（PA46 or Stanyl (DSM).）, polyamide 66（PA66 or nylon66 fiber）, polyamide 6 (PA6 Or nylon 6), poly- hexamethylene terephthalamide (PA6T), polyphthalamide (PPA), polyether-ether-ketone (PEEK), polyphenylene sulfide Ether（PPS）, described additive includes the glass fibre of 20%-60%（GF）, the carbon fibre of 20%-60%（CF）, the virtue of 20%-60% Synthetic fibre fiber（PPTA）, the phenolic fibre of 20%-60%（PHE）, described percentage composition exists for additive Mass percent in manufacture material；Certainly can also be other high heat-resisting thermoplastic (high heat-resisting polyamide bases On or the thermoplastic on the basis of other high heat-resisting plastics).

Claims

1. drum-type asymmetric damping automatic belt tightener, it is characterized in that including：

There is the pedestal (01) of mandrel (03)；

Tensioner arm (02), it is assemblied in can be around described mandrel on described mandrel (03)（03）Swing with respect to pedestal, described Relatively turnable inner peripheral surface (11), outer peripheral face (21), the diameter of described outer peripheral face is set up separately on pedestal (01) and tensioner arm (02) Diameter less than described inner peripheral surface；

Torsionspring (04), it applies the elastic force to the deflection of belt tension direction to described tensioner arm；

Belt wheel (05), it is assemblied on described tensioner arm (02)；

Damping member (06,06A), it is in circular and is located between described outer peripheral face (21) and inner peripheral surface (11), this damping structure Part (06,06A) includes flexible member (61,61a) and some damping friction blocks (62,62a), described flexible member (61,61a) bag Include the elastic matrix (611,611a) of ring-type and some spring tongues (612,612a) that lasting radical elasticity is provided, described bullet Languid head (612,612a) on described elastic matrix (611,611a) to radially extending and to peripheral, oblique, described spring Tongue (612,612a) is upper to configure described damping friction block (62,62a), and described damping friction block (62,62a) is by described bullet The elastic force pressure holding of languid head (612,612a) on described inner peripheral surface (11) or outer peripheral face (21), described spring tongue When the incline direction of (612,612a) makes described tensioner arm rotate with respect to pedestal or when having rotation trend, described damping rubs The damping force that cleaning block (62,62a) is produced with described inner peripheral surface (11) or outer peripheral face (21) is in described tensioner arm to a side To when swinging or swing during trend big, when described tensioner arm swings in the other direction or swing little during trend；

Described elastic matrix rotatably assembles with respect to described outer peripheral face, inner peripheral surface, and the spring tongue described in a part prolongs Stretch to the outside of described elastic matrix and by corresponding damping friction block pressure holding on described inner peripheral surface, described in another part Spring tongue extends to the inner side of described elastic matrix and by corresponding damping friction block pressure holding on described outer peripheral face, extends Spring tongue to incline direction and the inner side extending to described elastic matrix of the spring tongue in the outside of described elastic matrix Incline direction contrary.

2. drum-type asymmetric damping automatic belt tightener, it is characterized in that including：

There is the pedestal (01) of mandrel (03)；

Belt wheel (05), it is assemblied on described tensioner arm (02)；

Described damping friction block (62,62a) include being formed the skeleton (621,621a) of an entirety and friction piece (622, 622a), described skeleton (621,621a) is provided with the interior concave space being absorbed in for described spring tongue (612,612a) (6211,6211a).

3. drum-type asymmetric damping automatic belt tightener according to claim 1 and 2, is characterized in that：Described periphery Face (21) is located at upper, the described inner peripheral surface (11) of described tensioner arm (02) and is located on described pedestal (01), or described Outer peripheral face is located on described pedestal, described inner peripheral surface is located on described tensioner arm.

4. drum-type asymmetric damping automatic belt tightener according to claim 1 and 2, is characterized in that：Described elasticity With respect to described outer peripheral face (21) fixing assembling, each described spring tongue (612) extends to described elasticity to matrix (611) The outside of matrix (611) and by the pressure holding of corresponding damping friction block (62) on described inner peripheral surface (11), each described bullet The incline direction of languid head (612) is identical.

5. drum-type asymmetric damping automatic belt tightener according to claim 1 and 2, is characterized in that：Described elasticity For described inner peripheral surface fixing assembling, each described spring tongue extends to the inner side of described elastic matrix and incites somebody to action matrix phase On described outer peripheral face, the incline direction of each described spring tongue is identical for corresponding damping friction block pressure holding.

6. drum-type asymmetric damping automatic belt tightener according to claim 1 and 2, is characterized in that：Described spring Tongue is to form from the edge of described elastic matrix or/and middle part punching deformation.

7. drum-type asymmetric damping automatic belt tightener according to claim 1 and 2, is characterized in that：Each is described Damping friction block (62,62a) has the rubbing surface adaptable with the radian of described inner peripheral surface or outer peripheral face.

8. drum-type asymmetric damping automatic belt tightener according to claim 1 and 2, is characterized in that：Described torsion bullet One end of spring (04) is supported on upper or fixing with the described pedestal component of described pedestal (01), and the other end is supported on described On upper or fixing with the described tensioner arm component of tensioner arm (02).

9. drum-type asymmetric damping automatic belt tightener according to claim 1 and 2, is characterized in that：Described pedestal (01) body and the attachment being attached on body or/and the ennation extending are included from body；Described tensioner arm (02) body and the attachment being attached on body or/and the ennation extending are included from body.

10. drum-type asymmetric damping automatic belt tightener according to claim 1 and 2, is characterized in that：Described damping rubs The manufacture material that cleaning block contacts friction part with described inner peripheral surface or outer peripheral face is high heat-resisting thermoplastic.

11. drum-type asymmetric damping automatic belt tighteners according to claim 10, is characterized in that：Described height is heat-resisting Thermoplastic be to add any one additive following in any one basic material following to form, described basic material includes Polyamide 46, polyamide 66, polyamide 6, poly- hexamethylene terephthalamide, polyphthalamide, polyether-ether-ketone, polyphenylene sulfide Ether, described additive includes the glass fibre of 20%-60%, the carbon fibre of 20%-60%, the aramid fiber of 20%-60%, 20%- 60% phenolic fibre, described percentage composition is mass percent in manufacture material for the additive.