CN208221507U - Asymmetric adjustable damping automatic tensioner - Google Patents
Asymmetric adjustable damping automatic tensioner Download PDFInfo
- Publication number
- CN208221507U CN208221507U CN201820723542.5U CN201820723542U CN208221507U CN 208221507 U CN208221507 U CN 208221507U CN 201820723542 U CN201820723542 U CN 201820723542U CN 208221507 U CN208221507 U CN 208221507U
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- Prior art keywords
- helical spring
- pedestal
- spring
- metallic support
- main shaft
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Abstract
The utility model relates to a kind of asymmetric adjustable damping automatic tensioners, it is characterized by comprising pedestals, main shaft, articulated arm, first helical spring, drag ring, second helical spring, third helical spring, metallic support and at least two panels damping fin, damping fin is symmetrically positioned and is sticked on the outer circumference surface of metallic support, second helical spring and the first helical spring, third helical spring it is oppositely oriented, it is sleeved on drag ring, the utility model is simple and compact for structure, when dynamo belt tenses, articulated arm makes the first helical spring relative to the revolution of pedestal, second helical spring, drag ring, third helical spring and damping fin act on the big damping of generation altogether, violent shake will not be generated to limit dynamo belt, when dynamo belt is partially loose, the damping of automatic tensioner is smaller and is quickly tensioned dynamo belt.
Description
Technical field
The utility model relates to a kind of automatic tensioners for keeping automobile engine belt tension and absorbing vibration, especially
It is related to a kind of asymmetric adjustable damping automatic tensioner.
Background technique
Automatic tensioner for automobile engine belt is indispensable in engine behind front wheel accessory drive system.
Firstly, its effect is to provide a pretightning force for engine behind front wheel drive system, prevent from skidding between belt and belt pulley；Separately
One effect is exactly the damping structure of its own can be with the vibration of attenuation factor.When crank shaft angle vibration is excessive, system is often needed
The automatic tensioner for wanting a damping very big, it is desirable that the automatic tensioner is when belt is partially loose, the rapid tightening belt of stretcher, this
When damping cannot be excessive.When tension on belt, the big damping generation of automatic tensioner is acted on, and limitation belt will not generate violent
Shake.
Utility model content
The applicant is directed to above-mentioned problem, has carried out Improvement, provides a kind of asymmetric adjustable damping auto-tensioning
Device, simple and compact for structure, when dynamo belt tenses, automatic tensioner generates big damping action, and limitation dynamo belt is not
Violent shake can be generated, when dynamo belt is partially loose, the damping of automatic tensioner is smaller and is quickly tensioned dynamo belt.
In order to solve the above-mentioned technical problem, the utility model adopts the following technical solutions:
A kind of asymmetric adjustable damping automatic tensioner, comprising:
One pedestal, the outer wall for the cups with opening, pedestal are equipped with positioning wedged block；
One main shaft is coaxially installed in the pedestal, and in the bottom of the pedestal, main shaft is equipped with for the lower end die casting of main shaft
Axially extending bore；
Single-revolution arm, an end are covered on the opening of the pedestal and are rotatably connected in the upper end of the main shaft,
Another end is equipped with the rotatable belt pulley being bonded with dynamo belt；
One first helical spring is helical torsional spring, is arranged in the pedestal that one end of the first helical spring connects
The pedestal, the other end connect the articulated arm, and the first helical spring drives the articulated arm around the main shaft gyration to make
Belt pulley on the articulated arm is bonded with dynamo belt；
One drag ring is sleeved on the main shaft；
One second helical spring is helical torsional spring, oppositely oriented with first helical spring, is sleeved on described
On drag ring, the inner peripheral surface of the second helical spring is contacted with the outer wall of drag ring, described in one end connection of the second helical spring
Articulated arm, the other end are free end；
One third helical spring is helical torsional spring, is sleeved on the main shaft, the rotation with first helical spring
To identical, one end connection pedestal of third helical spring, the other end connection drag ring；
One metallic support, for the circular ring shape part with opening, metallic support coaxial package is outside first helical spring
And the inner surface of metallic support contacts the outer surface of first helical spring, and the opening of metallic support is connected to the revolution
On convex block on arm；
At least two panels damping fin is in arc-shaped, and symmetrical positioning sticks on the outer circumference surface of the metallic support, damping fin
Inner wall contact the outer wall of the metallic support, when turning round revolution of arm is bonded belt pulley with dynamo belt, described first
Helical spring torsion becomes larger to outer diameter to strut the metallic support, and the radial compression power of the metallic support makes the damping
Piece is strutted outward to be fitted on the inner wall of the pedestal.
It is further:
The upper end of second helical spring is equipped with clubfoot, and the clubfoot is stuck in the card slot on the articulated arm.
The spring silk section of second helical spring is rectangle.
The third helical spring is both ends without clubfoot helical spring, and the lower end of the drag ring is equipped with block, the base
The bottom of seat is equipped with the first lower stopper, and one end of the third helical spring is against on the block of the drag ring lower end, described
The other end of third helical spring is against in first lower stopper.
First helical spring and the third helical spring are left hand helix spring, and second helical spring is the right side
Revolve helical spring.
The both ends of the metallic support are equipped with limited bayonet, and the inner wall of the damping fin is equipped with interior fixture block, the damping fin
One end be equipped with end fixture block, the interior fixture block of the damping fin and end fixture block are respectively engaged with corresponding positioning on the metallic support
In bayonet.
The end fixture block of the damping fin is equipped with the grab extended axially inwardly, and the grab is connected to the metallic support
Inner wall.
The outer wall of the damping fin is equipped with axial through slot.
First helical spring is both ends without clubfoot helical spring, and the articulated arm is equipped with upper stopper, the pedestal
Bottom be equipped with the second lower stopper, one end of first helical spring is against in the upper stopper, first helical spring
The other end be against in second lower stopper.
The first bushing is equipped between the main shaft and the rotary hole of the articulated arm, first bushing is cylindrical annular
Part, the first bushing inner hole have wear-resistant coating, are clearance fit, institute between the inner hole and the main shaft of first bushing
It states between the rotary hole of articulated arm and first bushing as interference fit；Second is equipped between the main shaft and the drag ring
Bushing, second bushing are cylindrical annular part, and the second bushing inner hole has wear-resistant coating, the inner hole of second bushing
It is clearance fit between the main shaft, is interference fit between the drag ring and second bushing.
The utility model has the technical effect that
A kind of asymmetric adjustable damping automatic tensioner disclosed by the utility model, it is simple and compact for structure, when engine skin
When band tenses, automatic tensioner generates big damping action, and limitation dynamo belt will not generate violent shake, in engine skin
When band-offset pine, the damping of automatic tensioner is smaller and is quickly tensioned dynamo belt.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Fig. 2 is cross-sectional view at the A-A of Fig. 1.
Fig. 3 is cross-sectional view at the B-B of Fig. 1.
Fig. 4 is the three-dimensional explosion figure of the utility model.
Fig. 5 is the three dimensional structure diagram of the second helical spring.
Fig. 6 is the three dimensional structure diagram of drag ring.
Fig. 7 is the three-dimensional mounting structure schematic diagram of damping fin and metallic support.
Fig. 8 is the three dimensional structure diagram of metallic support.
Fig. 9 is the three dimensional structure diagram of damping fin.
Figure 10 is the three dimensional structure diagram of articulated arm.
Figure 11 is the three dimensional structure diagram of pedestal.
Specific embodiment
Specific embodiment of the present utility model is described in further detail with reference to the accompanying drawing.
As shown in Fig. 1 ~ 4, the utility model include a pedestal 1, a main shaft 2, single-revolution arm 7, one first helical spring 3,
One drag ring 15, one second helical spring 14, a third helical spring 16, a metallic support 5, two panels damping fin 4, pedestal 1 are
The outer wall of cups with opening, pedestal 1 is equipped with positioning wedged block 103, and main shaft 2 is coaxially installed in pedestal 1, main shaft 2
Lower end die casting forms an accommodating chamber in the bottom of pedestal 1 in pedestal 1, and main shaft 2 is equipped with axially extending bore 201, and pedestal 1 is logical
It crosses axially extending bore 201 to be fixedly mounted on the casing of engine with bolt, positioning wedged block 103 is used for positioning when installing.Revolution
One end of arm 7 is covered on the opening of pedestal 1 and is rotatably connected in the upper end of main shaft 2, time of main shaft 2 and articulated arm 7
It is equipped with the first bushing 6 between turn hole, the first bushing 6 is cylindrical annular part, and the inner hole of the first bushing 6 has a wear-resistant coating, first
It is clearance fit between the inner hole and main shaft 2 of bushing 6, is interference fit between the rotary hole of articulated arm 7 and the first bushing 6；It is main
The upper end of axis 2 is pressed with fast pulley 9, and for the axial limiting of articulated arm 7, pulley 8 is equipped between fast pulley 9 and articulated arm 7, sliding
Wheel 8 is made of nylon material, it is ensured that articulated arm 7 can be rotated flexible；Another end of articulated arm 7 is equipped with pastes with dynamo belt
The rotatable belt pulley 12 closed, belt pulley 12 are mounted on articulated arm 7 by bearing 10, dustproof cover 13, bolt 11, bearing 10
For rolling bearing.First helical spring 3 is helical torsional spring, and the first helical spring 3 is arranged in pedestal 1, positioned at pedestal 1
In accommodating chamber, articulated arm 7 is equipped with upper stopper 701(such as Figure 10), the bottom of pedestal 1 is equipped with second lower stopper 102(such as Figure 11),
First helical spring 3 is both ends without clubfoot helical spring (such as Fig. 4), and one end of the first helical spring 3 is against in upper stopper 701,
The other end of first helical spring 3 is against in the second lower stopper 102, and the first helical spring 3 drives articulated arm 7 to turn round around main shaft 2
To make the belt pulley 12 on articulated arm 7 be bonded with dynamo belt.Drag ring 15 is sleeved on main shaft 2, and drag ring 15 can be by
Metal or nonmetallic materials are made, and are such as made of engineering nylon material.The second bushing 17 is equipped between main shaft 2 and drag ring 15,
Second bushing 17 is cylindrical annular part, and 17 inner hole of the second bushing has wear-resistant coating, between the inner hole and main shaft 2 of the second bushing 17
It is interference fit between drag ring 15 and the second bushing 17 for clearance fit.Second helical spring 14 is helical torsional spring, the
Two helical springs 14 are oppositely oriented with the first helical spring 3, and the second helical spring 14 is sleeved on drag ring 15, the second spiral
The inner peripheral surface of spring 14 is contacted with the outer wall of drag ring 15, and drag ring 15 can be held or be detached to the second helical spring 14 tightly.
The upper end of second helical spring 14 is equipped with clubfoot 141(such as Fig. 5), clubfoot 141 is stuck in card slot 703(Figure 10 on articulated arm 7) in,
The other end of second helical spring 14 is free end.Third helical spring 16 be helical torsional spring, 16 sets of third helical spring
On main shaft 2, third helical spring 16 is identical as the rotation direction of the first helical spring 3, and third helical spring 16 is both ends without curved
Foot screw spring (such as Fig. 4), the lower end of drag ring 15 are equipped with block 151, and the bottom of pedestal 1 is schemed equipped with the first lower stopper 101(
11), one end of third helical spring 16 is against on the block 151 of 15 lower end of drag ring, and the other end of third helical spring 16 supports
In the first lower stopper 101.When articulated arm 7 and 1 relative motion of pedestal, direction is consistent with 14 rotation direction of the second helical spring to be added
When load, the internal diameter contraction of the second helical spring 14 becomes smaller, and the second helical spring 14 can hold drag ring 15 tightly, and articulated arm 7 turns
Dynamic to be transferred to third helical spring 16 by drag ring 15, to generate torque, 14 spring silk section of the second helical spring can be
Rectangle, or round, the second helical spring 14 uses the spring silk of rectangular section, such second spiral bullet in the present embodiment
Spring 14 can produce bigger torque when holding drag ring 15 tightly；When 7 direction of motion of articulated arm and the second helical spring 14 are oppositely oriented
When unloading, 14 internal diameter of the second helical spring becomes larger and is detached from drag ring 15, and third helical spring 16 does not work, do not generate
Torque.In the present invention, the first helical spring 3 is identical as the rotation direction of third helical spring 16, the second helical spring 14 with
First helical spring 3 and third helical spring 16 it is oppositely oriented, their rotation direction can determine according to actual needs, in this reality
It applies in example, the first helical spring 3 and third helical spring 16 are left hand helix spring, and the second helical spring 14 is right hand helix bullet
Spring.Metallic support 5 is with the circular ring shape part (Fig. 7,8) of opening 502, and 5 coaxial package of metallic support is outside the first helical spring 3
And the inner surface of metallic support 5 contacts the outer surface of the first helical spring 3, and the effect of metallic support 5 is fixed friction damping
Piece simultaneously increases rigidity for damping fin.The opening 502 of metallic support 5 is connected to convex block 702(Figure 10 on articulated arm 7) on, make gold
Belonging to bracket 5 will not relatively rotate in circumferencial direction and articulated arm 7.Two panels damping fin 4 is in respectively arc-shaped, by engineering nylon
Material is made, and symmetrical positioning sticks on the outer circumference surface of metallic support 5, outside the inner wall contact metallic support 5 of damping fin 4
Wall, when turning round revolution of arm is bonded belt pulley with dynamo belt, the torsion of the first helical spring 3 is to make outer diameter become larger to support
Metallic support 5 is opened, the radial compression power of metallic support 5 struts two panels damping fin 4 to be fitted on the inner wall of pedestal 1 outward,
The sliding opposite with 1 inner wall of pedestal of two panels damping fin 4 generates frictional damping to absorb the vibration from dynamo belt, is symmetrical arranged
4 quantity of damping fin be at least two panels, the quantity of damping fin 4 can be determine according to actual needs.In the present embodiment, as Fig. 7,8,
Shown in 9, the both ends of metallic support 5 are equipped with limited bayonet 501, and the inner wall of damping fin 4 is equipped with interior fixture block 401, one end of damping fin 4
Equipped with end fixture block 402, the interior fixture block 401 and end fixture block 402 of damping fin 4 are respectively engaged with corresponding positioning card on metallic support 5
In mouth 501.The end fixture block 402 of damping fin 4 is equipped with the grab 403 extended axially inwardly, and grab 403 is connected to metallic support 5
Inner wall, to make the preferably location and installation of damping fin 4 on metallic support 5.The outer wall of damping fin 4 is equipped with axial through slot
404, through slot 404 is bonded damping fin 4 preferably with the inner wall of pedestal 1 after compression.
In present embodiment, the first helical spring 3 and third helical spring 16 are left hand helix spring, the second helical spring
14 be right hand helix spring, and pedestal 1 is fixedly mounted on the casing of engine, the first helical spring 3 drive the revolution of articulated arm 7 from
And the belt pulley 12 on articulated arm 7 is driven to be tensioned dynamo belt, articulated arm 7 makes the first spiral relative to the revolution of pedestal 1
The outer diameter of spring 3 increases, and the first helical spring 3 compressing metallic support 5 struts outward, so that damping fin 4 be driven to strut simultaneously outward
It is fitted on the inner wall of pedestal 1, the normal pressure of fitting depends on stiffness and the angle of revolution of helical spring, to see in Fig. 2
It arrives, two panels damping fin 4 is bonded 1 inner wall sliding friction of pedestal to generate friction damping force, and friction damping force, which absorbs, comes from engine
The vibration of belt, after long-time service, damping fin even wearing.When dynamo belt tense when, belt drive articulated arm 7 relative to
While the revolution of pedestal 1 increases the outer diameter of the first helical spring 3, articulated arm 7 drives the interior radial direction of the second helical spring 14
Contract and hold the oppositely oriented of drag ring 15(the second helical spring 14 and the first helical spring 3 tightly), the rotation of articulated arm 7 is logical
It crosses drag ring 15 and is transferred to third helical spring 16, so that torque is generated, damping of the automatic tensioner to dynamo belt at this time
Active force includes the torque and the first spiral shell generated by the second helical spring 14, drag ring 15 and 16 collective effect of third helical spring
The twisting resistance of spring 3, the friction damping force of damping fin 4 are revolved, the big damping generation effect that three power are formed by stacking, to limit hair
Motivation belt will not generate violent shake.When dynamo belt is partially loose, the first helical spring 3 drive articulated arm 7 relative to
The rotation direction of pedestal 1 with it is above-mentioned contrary, 14 internal diameter of the second helical spring become larger and with drag ring 15 be detached from, do not generate
Torque, automatic tensioner only includes twisting resistance, the damping fin 4 of the first helical spring 3 to the active force of dynamo belt at this time
Friction damping force, relative damping is smaller, and stretcher articulated arm 7 is tensioned rapidly engine skin under the action of the first helical spring 3
Band.
It can thus be seen that in the present invention, when dynamo belt tenses, by the second helical spring 14, friction
The torque that ring 15 and 16 collective effect of third helical spring generate plays the role of adjusting unidirectional damping characteristic, while passing through control
Parameter, the parameter of damping fin and drag ring of each spring can achieve the resistance of two direction of rotation of control automatic tensioner
Buddhist nun reaches asymmetric damping adjustable purpose.
Claims (10)
1. a kind of asymmetric adjustable damping automatic tensioner, characterized by comprising:
One pedestal, the outer wall for the cups with opening, pedestal are equipped with positioning wedged block；
One main shaft is coaxially installed in the pedestal, and in the bottom of the pedestal, main shaft is equipped with axial for the lower end die casting of main shaft
Through-hole；
Single-revolution arm, an end is covered on the opening of the pedestal and is rotatably connected in the upper end of the main shaft, another
A end is equipped with the rotatable belt pulley being bonded with dynamo belt；
One first helical spring is helical torsional spring, is arranged in the pedestal, described in one end connection of the first helical spring
Pedestal, the other end connect the articulated arm, and the first helical spring drives the articulated arm described to make around the main shaft gyration
Belt pulley on articulated arm is bonded with dynamo belt；
One drag ring is sleeved on the main shaft；
One second helical spring is helical torsional spring, oppositely oriented with first helical spring, is sleeved on the friction
On ring, the inner peripheral surface of the second helical spring is contacted with the outer wall of drag ring, and one end of the second helical spring connects the revolution
Arm, the other end are free end；
One third helical spring is helical torsional spring, is sleeved on the main shaft, the rotation direction phase with first helical spring
Together, one end of third helical spring connects the pedestal, and the other end connects the drag ring；
One metallic support, for the circular ring shape part with opening, metallic support coaxial package outside first helical spring and
The inner surface of metallic support contacts the outer surface of first helical spring, and the opening of metallic support is connected on the articulated arm
Convex block on；
At least two panels damping fin is in arc-shaped, and symmetrical positioning sticks on the outer circumference surface of the metallic support, damping fin it is interior
Wall contacts the outer wall of the metallic support, when turning round revolution of arm is bonded belt pulley with dynamo belt, first spiral
Spring torsion becomes larger to outer diameter to strut the metallic support, the radial compression power of the metallic support make the damping fin to
It struts outside to be fitted on the inner wall of the pedestal.
2. asymmetric adjustable damping automatic tensioner described in accordance with the claim 1, it is characterised in that: second helical spring
Upper end be equipped with clubfoot, the clubfoot is stuck in the card slot on the articulated arm.
3. asymmetric adjustable damping automatic tensioner according to claim 1 or 2, it is characterised in that: second spiral
The spring silk section of spring is rectangle.
4. asymmetric adjustable damping automatic tensioner described in accordance with the claim 1, it is characterised in that: the third helical spring
It is both ends without clubfoot helical spring, the lower end of the drag ring is equipped with block, and the bottom of the pedestal is equipped with the first lower stopper, institute
The one end for stating third helical spring is against on the block of the drag ring lower end, and the other end of the third helical spring is against institute
It states in the first lower stopper.
5. asymmetric adjustable damping automatic tensioner described in accordance with the claim 1, it is characterised in that: first helical spring
And the third helical spring is left hand helix spring, second helical spring is right hand helix spring.
6. asymmetric adjustable damping automatic tensioner described in accordance with the claim 1, it is characterised in that: the two of the metallic support
End is equipped with limited bayonet, and the inner wall of the damping fin is equipped with interior fixture block, and one end of the damping fin is equipped with end fixture block, the damping
The interior fixture block and end fixture block of piece are respectively engaged on the metallic support in corresponding limited bayonet.
7. asymmetric adjustable damping automatic tensioner according to claim 6, it is characterised in that: the end card of the damping fin
Block is equipped with the grab extended axially inwardly, and the grab is connected to the inner wall of the metallic support.
8. asymmetric adjustable damping automatic tensioner described in accordance with the claim 1, it is characterised in that: the outer wall of the damping fin
It is equipped with axial through slot.
9. asymmetric adjustable damping automatic tensioner described in accordance with the claim 1, it is characterised in that: first helical spring
It is both ends without clubfoot helical spring, the articulated arm is equipped with upper stopper, and the bottom of the pedestal is equipped with the second lower stopper, described
One end of first helical spring is against in the upper stopper, and the other end of first helical spring is against second lower stopper
On.
10. asymmetric adjustable damping automatic tensioner described in accordance with the claim 1, it is characterised in that: the main shaft with it is described
The first bushing is equipped between the rotary hole of articulated arm, first bushing is cylindrical annular part, and the first bushing inner hole has
Wear-resistant coating, between the inner hole and the main shaft of first bushing be clearance fit, the rotary hole of the articulated arm with it is described
It is interference fit between first bushing；The second bushing is equipped between the main shaft and the drag ring, second bushing is circle
Column annular element, the second bushing inner hole have wear-resistant coating, are gap between the inner hole and the main shaft of second bushing
Cooperation is interference fit between the drag ring and second bushing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820723542.5U CN208221507U (en) | 2018-05-16 | 2018-05-16 | Asymmetric adjustable damping automatic tensioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820723542.5U CN208221507U (en) | 2018-05-16 | 2018-05-16 | Asymmetric adjustable damping automatic tensioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208221507U true CN208221507U (en) | 2018-12-11 |
Family
ID=64507776
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820723542.5U Withdrawn - After Issue CN208221507U (en) | 2018-05-16 | 2018-05-16 | Asymmetric adjustable damping automatic tensioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208221507U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110645318A (en) * | 2019-10-31 | 2020-01-03 | 延锋安道拓(常熟)座椅机械部件有限公司 | One-way damping structure and adjusting assembly comprising same |
| CN110777501A (en) * | 2019-11-13 | 2020-02-11 | 上海东龙服饰有限公司 | Cloth belt tension adjusting and water absorbing device of air ironing machine |
-
2018
- 2018-05-16 CN CN201820723542.5U patent/CN208221507U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110645318A (en) * | 2019-10-31 | 2020-01-03 | 延锋安道拓(常熟)座椅机械部件有限公司 | One-way damping structure and adjusting assembly comprising same |
| CN110777501A (en) * | 2019-11-13 | 2020-02-11 | 上海东龙服饰有限公司 | Cloth belt tension adjusting and water absorbing device of air ironing machine |
| CN110777501B (en) * | 2019-11-13 | 2024-04-02 | 上海东龙服饰有限公司 | Cloth belt tension adjusting and water absorbing device of air ironing machine |
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Legal Events
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
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| AV01 | Patent right actively abandoned |
Granted publication date: 20181211 Effective date of abandoning: 20230704 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20181211 Effective date of abandoning: 20230704 |