CN203115028U - Automatic tensioning device - Google Patents
Automatic tensioning device Download PDFInfo
- Publication number
- CN203115028U CN203115028U CN 201320157345 CN201320157345U CN203115028U CN 203115028 U CN203115028 U CN 203115028U CN 201320157345 CN201320157345 CN 201320157345 CN 201320157345 U CN201320157345 U CN 201320157345U CN 203115028 U CN203115028 U CN 203115028U
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- CN
- China
- Prior art keywords
- steel support
- helical spring
- main shaft
- damping
- revoliving arm
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
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- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
Abstract
The utility model relates to an automatic tensioning device. The automatic tensioning device is characterized in that the automatic tensioning device comprises a base, a main shaft, a revolving arm, a spiral spring, a metal support and at least two damping fins, the spiral spring is sleeved on the main shaft, one end of the spiral spring is connected with the base, and the other end of the spiral spring is connected with the revolving arm; the metal support is sleeved outside the spiral spring in a coaxial mode, the inner surface of the metal support makes contact with the outer surface of the spiral spring, the damping fins are symmetrically located and abut against the outer circumferential face of the metal support, and inner walls of the damping fins make contact with the outer wall of the metal support. When the revolving arm revolves and enables a belt wheel to be attached to an engine belt, the spiral spring is twisted, therefore the outer diameter of the spiral spring is increased to spread the metal support, and radial extrusion force of the metal support enables the damping fins to be spread outwards and to be attached to the inner wall of the base. The automatic tensioning device is simple and compact in structure, the spiral spring is twisted, then the outer diameter of the spiral spring is increased to press the damping fins to be attached to the inner wall of the base to produce damping force, therefore the phenomenon of uneven abrasion of the damping fins can not happen, vibration of the revolving arm is reduced, and noise is reduced.
Description
Technical field
The utility model relates to a kind of automatic tensioner that keeps the motor car engine belt tension and absorb vibration.
Background technique
Automatic tensioner is widely used in the motor car engine, is used for keeping the motor car engine belt tension and absorbs vibration.At present, this class stretcher generally includes and adopts spring or other drive unit to drive the belt pulley of applying dynamo belt or the mode of other member, belt pulley is installed on the rotating revoliving arm of pedestal by bearing, hold spring or other drive unit in the pedestal, make dynamo belt keep constant-tension thereby spring or other drive unit drive the revoliving arm revolution.Usually stretcher also comprises the annulus friction member, and when revoliving arm turned round, the annulus friction member provided frictional damping for automatic tensioner, thereby suppresses or absorb the vibration of revoliving arm.After long-term use, the frictional damping sheet of friction member wear phenomenon can occur inevitably, because damping fin wearing and tearing are inhomogeneous, can cause the vibration of revoliving arm, and makes between the rubbing surface of damping fin and base internal wall and produce noise.
The model utility content
The applicant has carried out research and improved at above-mentioned problem, and a kind of automatic tensioner is provided, and is simple and compact for structure, avoids the generation of damping fin wearing and tearing non-uniform phenomenon, reduces the vibration of revoliving arm, reduces the generation of noise.
In order to solve the problems of the technologies described above, the utility model adopts following technological scheme:
A kind of automatic tensioner comprises:
One pedestal is for having the cup-shaped spare of opening;
One main shaft is coaxially installed in the described pedestal, and the lower end die casting of main shaft is in the bottom of described pedestal;
Single-revolution arm, end cover the opening of described pedestal and are rotatably connected in the upper end of described main shaft, and another end is provided with the rotating belt pulley of fitting with dynamo belt;
One helical spring, be helical torsional spring, be sleeved on the described main shaft that a helical spring end connects described pedestal, the other end connects described revoliving arm, around described main shaft gyration belt pulley and dynamo belt on the described revoliving arm is fitted thereby helical spring drives described revoliving arm;
One Steel Support, for having the ring spare of opening, the Steel Support coaxial package outside described helical spring and the internal surface of Steel Support contact described helical spring outer surface, Steel Support is provided with locating slot, described locating slot is connected on the projection on the described revoliving arm;
At least two damping fins, be circular-arc, the symmetry location abuts on the outer peripheral surface of described Steel Support, the inwall of damping fin contacts the outer wall of described Steel Support, when the revoliving arm revolution is fitted belt pulley and dynamo belt, thereby helical spring reverses external diameter to be become greatly to strut Steel Support, the lateral extrusion power of Steel Support makes two damping fins outwards strut to be fitted on the inwall of pedestal, and slide relative with base internal wall of damping fin produces frictional damping to absorb the vibration from dynamo belt.
Further:
The two ends of described Steel Support are provided with limited bayonet, and the inwall of described damping fin is provided with interior fixture block, and an end of described damping fin is provided with the end fixture block, and the interior fixture block of described damping fin and end fixture block are connected to respectively in the limited bayonet corresponding on the described Steel Support.
The end fixture block of described damping fin is provided with the grab that axially extends internally, and described grab is connected to the inwall of described Steel Support.
The outer wall of described damping fin is provided with axial groove.
Described helical spring is that two ends do not have the clubfoot helical spring, and described revoliving arm is provided with block, and the bottom of described pedestal is provided with down block, and a described helical spring end is against described going up on the block, and the described helical spring the other end is against on the described block down.
Be provided with lining between the rotary hole of described main shaft and described revoliving arm, described lining is the cylinder ring part, described lining endoporus has wear resistant coating, is Spielpassung between the endoporus of described lining and the described main shaft, is interference fit between the rotary hole of described revoliving arm and the described lining.
Technique effect of the present utility model is:
The disclosed a kind of automatic tensioner of the utility model, simple and compact for structure, utilizing helical spring to reverse external diameter increases, oppress symmetrically arranged damping fin and be fitted in base internal wall generation friction damping force, avoid the generation of damping fin wearing and tearing non-uniform phenomenon, reduce the vibration of revoliving arm, reduce the generation of noise.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the A-A place sectional view of Fig. 1.
Fig. 3 is three-dimensional explosion figure of the present utility model.
Fig. 4 is the three-dimensional mounting structure schematic representation of damping fin and Steel Support.
Fig. 5 is the three-dimensional structure schematic representation of Steel Support.
Fig. 6 is the three-dimensional structure schematic representation of damping fin.
Fig. 7 is the three-dimensional structure schematic representation of revoliving arm.
Fig. 8 is the three-dimensional structure schematic representation of pedestal.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail.
As shown in Figure 1, 2, 3, the utility model comprises a pedestal 1, a main shaft 2, single-revolution arm 7, a helical spring 3, a Steel Support 5, two damping fins 4, pedestal 1 is for having the cup-shaped spare of opening, main shaft 2 is coaxially installed in the pedestal 1, the lower end die casting of main shaft 2 is in the bottom of pedestal 1, form an accommodating chamber in pedestal 1, pedestal 1 is provided with otic placode 101, and pedestal 1 is installed on the casing of motor by otic placode 101 usefulness bolt.An end of revoliving arm 7 covers the opening of pedestal 1 and is rotatably connected in the upper end of main shaft 2, be provided with lining 6 between the rotary hole of main shaft 2 and revoliving arm 7, lining 6 is the cylinder ring part, the endoporus of lining 6 has wear resistant coating, being Spielpassung between the endoporus of lining 6 and the main shaft 2, is interference fit between the rotary hole of revoliving arm 7 and the lining 6; The upper end of main shaft 2 is pressed with fast pulley 9, is used for the axial limiting of revoliving arm 7, is provided with pulley 8 between fast pulley 9 and the revoliving arm 7, and pulley 8 usefulness nylon materials are made, and guarantees that revoliving arm 7 is flexibly rotatable; Another end of revoliving arm 7 is provided with the rotating belt pulley 12 of fitting with dynamo belt, and belt pulley 12 is installed on the revoliving arm 7 by bearing 10, dust cover 13, bolt 14, and bearing 10 is rolling bearing.Helical spring 3 is helical torsional spring, helical spring 3 is sleeved on the main shaft 2, be arranged in the accommodating chamber of pedestal 1, revoliving arm 7 is provided with block 701(such as Fig. 7), the bottom of pedestal 1 is provided with down block 102(such as Fig. 8), helical spring 3 does not have clubfoot helical spring (as Fig. 3) for two ends, one end of helical spring 3 is against on the block 701, the other end of helical spring 3 is against down on the block 102, around main shaft 2 revolutions the belt pulley 12 on the revoliving arm 7 is fitted thereby helical spring 3 drives revoliving arm 7 with dynamo belt.Steel Support 5 is for having the ring spare of opening, and Steel Support 5 coaxial packages are helical spring 3 outside and the outer surface of the internal surface of Steel Support 5 contact helical spring 3, and the effect of Steel Support 5 is fixed friction damping fins and is damping fin increase rigidity.Steel Support 5 is provided with locating slot 502(such as Fig. 4), locating slot 502 is connected to projection 702(such as the Fig. 7 on the revoliving arm) on, Steel Support 5 can not rotated at circumferencial direction.Two damping fins 4 are circular-arc respectively, made by the engineering nylon material, the symmetry location abuts on the outer peripheral surface of Steel Support 5, the outer wall of the inwall contacting metal support 5 of damping fin 4, when the revoliving arm revolution is fitted belt pulley and dynamo belt, thereby helical spring 3 reverses external diameter is become greatly to strut Steel Support 5, the lateral extrusion power of Steel Support 5 makes two damping fins 4 outwards strut to be fitted on the inwall of pedestal 1, two slide relative with pedestal 1 inwall of damping fin 4 produce frictional damping to absorb the vibration from dynamo belt, symmetrically arranged damping fin 4 quantity are at least two, and the quantity of damping fin 4 can be determined according to actual needs.In the present embodiment, shown in Fig. 4,5,6, the two ends of Steel Support 5 are provided with limited bayonet 501, the inwall of damping fin 4 is provided with interior fixture block 401, one end of damping fin 4 is provided with end fixture block 402, and the interior fixture block 401 of damping fin 4 and end fixture block 402 are connected to respectively in the limited bayonet 501 corresponding on the Steel Support 5.The end fixture block 402 of damping fin 4 is provided with the grab 403 that axially extends internally, and grab 403 is connected to the inwall of Steel Support 5, thus make damping fin 4 just well location and installation on Steel Support 5.The outer wall of damping fin 4 is provided with axial groove 404, and groove 404 is fitted damping fin 4 better with the inwall of pedestal 1 behind pressurized.
In the present embodiment, automatic tensioner adopts the right hand helix spring, pedestal 1 is fixedly mounted on the casing of motor, revoliving arm 7 counterclockwise (belt pulley is preceding) thus the belt pulley 12 that revolution drives on the revoliving arm 7 comes the tensioning dynamo belt, revoliving arm 7 increases the external diameter of helical spring 3 with respect to the revolution of pedestal 1, helical spring 3 compressing Steel Supports 5 outwards strut, thereby driving two damping fins 4 outwards struts and is fitted on the inwall of pedestal 1, the positive pressure of fitting depends on helical spring stiffness and angle of revolution, in Fig. 2, can see, the 1 inwall sliding friction of two damping fin 4 applying pedestals is to produce friction damping force, friction damping force absorbs the vibration from dynamo belt, after long-term the use, the damping fin wearing and tearing evenly.
Claims (6)
1. automatic tensioner is characterized in that comprising:
One pedestal is for having the cup-shaped spare of opening;
One main shaft is coaxially installed in the described pedestal, and the lower end die casting of main shaft is in the bottom of described pedestal;
Single-revolution arm, end cover the opening of described pedestal and are rotatably connected in the upper end of described main shaft, and another end is provided with the rotating belt pulley of fitting with dynamo belt;
One helical spring, be helical torsional spring, be sleeved on the described main shaft that a helical spring end connects described pedestal, the other end connects described revoliving arm, around described main shaft gyration belt pulley and dynamo belt on the described revoliving arm is fitted thereby helical spring drives described revoliving arm;
One Steel Support, for having the ring spare of opening, the Steel Support coaxial package outside described helical spring and the internal surface of Steel Support contact described helical spring outer surface, Steel Support is provided with locating slot, described locating slot is connected on the projection on the described revoliving arm;
At least two damping fins, be circular-arc, the symmetry location abuts on the outer peripheral surface of described Steel Support, the inwall of damping fin contacts the outer wall of described Steel Support, when the revoliving arm revolution is fitted belt pulley and dynamo belt, thereby helical spring reverses external diameter to be become greatly to strut Steel Support, the lateral extrusion power of Steel Support makes two damping fins outwards strut to be fitted on the inwall of pedestal, and slide relative with base internal wall of damping fin produces frictional damping to absorb the vibration from dynamo belt.
2. according to the described automatic tensioner of claim 1, it is characterized in that: the two ends of described Steel Support are provided with limited bayonet, the inwall of described damping fin is provided with interior fixture block, one end of described damping fin is provided with the end fixture block, and the interior fixture block of described damping fin and end fixture block are connected to respectively in the limited bayonet corresponding on the described Steel Support.
3. according to the described automatic tensioner of claim 2, it is characterized in that: the end fixture block of described damping fin is provided with the grab that axially extends internally, and described grab is connected to the inwall of described Steel Support.
4. according to the described automatic tensioner of claim 1, it is characterized in that: the outer wall of described damping fin is provided with axial groove.
5. according to the described automatic tensioner of claim 1, it is characterized in that: described helical spring is that two ends do not have the clubfoot helical spring, described revoliving arm is provided with block, the bottom of described pedestal is provided with down block, a described helical spring end is against described going up on the block, and the described helical spring the other end is against on the described block down.
6. according to the described automatic tensioner of claim 1, it is characterized in that: be provided with lining between the rotary hole of described main shaft and described revoliving arm, described lining is the cylinder ring part, described lining endoporus has wear resistant coating, being Spielpassung between the endoporus of described lining and the described main shaft, is interference fit between the rotary hole of described revoliving arm and the described lining.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320157345 CN203115028U (en) | 2013-04-01 | 2013-04-01 | Automatic tensioning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320157345 CN203115028U (en) | 2013-04-01 | 2013-04-01 | Automatic tensioning device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203115028U true CN203115028U (en) | 2013-08-07 |
Family
ID=48895377
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320157345 Withdrawn - After Issue CN203115028U (en) | 2013-04-01 | 2013-04-01 | Automatic tensioning device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203115028U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103174807B (en) * | 2013-04-01 | 2015-09-16 | 无锡永凯达齿轮有限公司 | Automatic tensioner |
| CN107387693A (en) * | 2017-09-21 | 2017-11-24 | 无锡永凯达齿轮有限公司 | The belt stress compensated automatically with unidirectional high-damping |
-
2013
- 2013-04-01 CN CN 201320157345 patent/CN203115028U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103174807B (en) * | 2013-04-01 | 2015-09-16 | 无锡永凯达齿轮有限公司 | Automatic tensioner |
| CN107387693A (en) * | 2017-09-21 | 2017-11-24 | 无锡永凯达齿轮有限公司 | The belt stress compensated automatically with unidirectional high-damping |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130807 Effective date of abandoning: 20150916 |
|
| RGAV | Abandon patent right to avoid regrant |