CN2725631Y - Chainsaw chain tensioning device - Google Patents
Chainsaw chain tensioning device Download PDFInfo
- Publication number
- CN2725631Y CN2725631Y CN 200420082111 CN200420082111U CN2725631Y CN 2725631 Y CN2725631 Y CN 2725631Y CN 200420082111 CN200420082111 CN 200420082111 CN 200420082111 U CN200420082111 U CN 200420082111U CN 2725631 Y CN2725631 Y CN 2725631Y
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- CN
- China
- Prior art keywords
- friction disc
- closing sleeve
- tension device
- cylindrical shell
- internal friction
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- 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.)
- Expired - Fee Related
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Abstract
The utility model relates to an electric chainsaw in particular to an improved chain tensioning device of the electric chainsaw, comprising an eccentric which makes a guide plate longitudinally move and a screw bolt whose one end is fixed on a deceleration box body; an internal friction disc integrated with the eccentric is arranged at the upper part of the eccentric; a lower clipping body is arranged at the upper end surface of the internal friction disc; the screw bolt penetrates a through hole at the center of the internal friction disc; an external friction disc is above the internal friction disc; the lower end surface of the external friction disc is provided with an upper clipping body matched with the lower clipping body; the upper clipping body is provided with a clamping sleeve; a tube is arranged in the clamping sleeve; a lower-convex annular body which shares the same axle with the tube is arranged on the tube; the inner wall of the annular body is provided with a tank body and a convex body which are matched with the outer wall of the external friction disc; a spring body is provided between the external friction disc and the clamping sleeve in which an internal screw matched with the screw bolt is provided. The utility model solves the problem of the tensioning device of the existing chainsaw which only has the tensioning function without pressing tightly the guide plate.
Description
Technical field
The utility model relates to a kind of electric chain saw, particularly a kind of improvement of chain tension structure of electric chain saw.
Technical background
In known chain saw (CN 1138620C), this chain saw has one and be rotatably supported in sprocket wheel in the housing and saw chain that be used for being guided on plate, one is used to make that plate vertically moves and has a chain stretching device that makes eccentric wheel that plate moves and make the rotating device that eccentric wheel rotates, for produce have nothing to do with operator and be best chain tension for working procedure, rotary connecting device between rotating device and the eccentric wheel constitutes as transposition clamping clutch, regulates its transposition clamping power corresponding to required chain tension.
The tension device of above-mentioned patent application only has the tension to saw chain, and does not have the pressuring action to guide plate, operates comparatively loaded down with trivial details.
Summary of the invention
The tension device that the utility model has solved the chain saw that prior art exists only has tension and does not have problems such as pressuring action to guide plate, provide a kind of reasonable in design, when being had tension, saw chain also has to the guide plate pressuring action saw chain chain stretching device that Operation and maintenance are comparatively easy.Above-mentioned technical purpose of the present utility model mainly solves by the following technical programs: comprise that an eccentric wheel that causes the guide plate longitudinal movement and one one end are fixed on the bolt on the deceleration box, described eccentric wheel top is provided with internal friction disc formed integrally therewith, the upper-end surface of described internal friction disc is provided with down locking member, and described bolt passes the central through bore of internal friction disc; The external friction dish is located at the top of internal friction disc, and the lower end surface of described external friction dish is provided with the last locking member that matches with following locking member, which is provided with closing sleeve; Be provided with cylindrical shell in the described closing sleeve, which is provided with down protruding and coaxial with described cylindrical shell ring body, the inwall of described ring body is provided with convex body and the cell body that cooperates with the outer wall of external friction dish, be provided with the spring body between external friction dish and closing sleeve, be provided with the internal thread that matches with described bolt in the described cylindrical shell.Clockwise rotate closing sleeve and drive the rotation of external friction dish, thereby cause internal friction disc to clockwise rotate eccentric wheel is and then rotated, eccentric wheel promotes guide plate vertically to the direction motion away from sprocket wheel 1, and chain is tightened up.Otherwise chain is loosened.After chain is tightened to a certain degree, begin to skid between external friction dish and the internal friction disc, after this clockwise rotate closing sleeve again till tightly fastening guide plate.Like this, under the operation of a mechanism, both reached tensioning purpose, reached the purpose that compresses simultaneously again guide plate to saw chain, easy and simple to handle.
As preferably, described closing sleeve is made of injection molding body.Closing sleeve adopts injection molding body to constitute, and can reduce the quality of chain saw, reduces the manufacture cost of chain saw.
As preferably, be provided with slider guide between described guide plate and internal friction disc, described slider guide is provided with block body, and described eccentric wheel causes the guide plate longitudinal movement by cooperating with described block body.Adopt that on the slider guide block body to be set related with eccentric wheel,, only need the replacing slider guide to get final product, need not change guide plate, make that the maintenance of chain saw is more convenient if when block body occurring and damaging.
As preferably, the inside of described external friction dish is provided with annular boss, and the inwall and the described closing sleeve of described annular boss, external friction dish have constituted the chamber that holds described spring body, and the lower end of described spring body and described annular boss offset.
As preferably, the lower end of described internal friction disc is provided with the annular housing that is made of internal friction disc and described cylindrical shell, is provided with the spring collar that is fastened on the described cylindrical shell in the described annular housing.Wherein, spring collar can be fixed on internal friction disc on the closing sleeve, prevents that internal friction disc from coming off.
As preferably, described closing sleeve periphery is provided with tightens body.Wherein, tighten the friction that body can increase closing sleeve and hand, make things convenient for the user to rotate to turn the operation of closing sleeve.
As preferably, described closing sleeve is provided with cover plate, and described cover plate is provided with the through hole that the ring body for described closing sleeve passes.Wherein, cover plate can be packaged in chain tension adjusters in it, prevents falling into of dust.
As preferably, the length of described closing sleeve cylindrical shell is exposed to length on the deceleration box greater than described bolt.The length of cylindrical shell is exposed to length on the deceleration box greater than bolt, can make the saw chain back closing sleeve that is tensioned can continue to compress guide plate around the bolt rotation.
As preferably, described cylindrical shell and closing sleeve are injected into one.
Therefore, the utlity model has reasonable in designly, also have when saw chain is had tension the guide plate pressuring action, Operation and maintenance comparatively easy etc. characteristics.Clockwise rotate closing sleeve and drive the rotation of external friction dish, thereby cause internal friction disc to clockwise rotate eccentric wheel is and then rotated, eccentric wheel promotes guide plate vertically to the direction motion away from sprocket wheel 1, and chain is tightened up.Otherwise chain is loosened.After chain is tightened to a certain degree, begin to skid between external friction dish and the internal friction disc, after this clockwise rotate closing sleeve again till tightly fastening guide plate.Like this, under the operation of a mechanism, both reached tensioning purpose, reached the purpose that compresses simultaneously again guide plate to saw chain, easy and simple to handle.Closing sleeve adopts injection molding body to constitute, and can reduce the quality of chain saw, reduces the manufacture cost of chain saw.Adopt that on the slider guide block body to be set related with eccentric wheel,, only need the replacing slider guide to get final product, need not change guide plate, make that the maintenance of chain saw is more convenient if when block body occurring and damaging.Wherein, spring collar can be fixed on internal friction disc on the closing sleeve, prevents that internal friction disc from coming off.The length of cylindrical shell is exposed to length on the deceleration box greater than bolt, can make the saw chain back closing sleeve that is tensioned can continue to compress guide plate around the bolt rotation.Wherein, cover plate can be packaged in chain tension adjusters in it, prevents falling into of dust.Wherein, tighten the friction that body can increase closing sleeve and hand, make things convenient for the user to rotate to turn the operation of closing sleeve.
Description of drawings
Accompanying drawing 1 is a kind of structural representation of the present utility model;
Accompanying drawing 2 is a kind of decomposition texture schematic representation of the present utility model.
Specific embodiment
Below by embodiment, and in conjunction with the accompanying drawings, the technical solution of the utility model is described in further detail.
Embodiment 1: as Fig. 1, shown in Figure 2, deceleration box is provided with stud bolt 6, saw chain is along being centered around on guide plate 22 and the sprocket wheel, be connected with slider guide 20 on the guide plate 22, slider guide 20 is provided with block body 21, block body 21 offsets with eccentric wheel 12 and causes slider guide and guide plate vertically to the direction motion away from sprocket wheel by eccentric wheel 12, eccentric wheel 12 is provided with the internal friction disc 9 that is made as one with it, the lower end of internal friction disc is provided with the annular housing 11 that is made of internal friction disc and cylindrical shell, be provided with the spring collar 10 that is fastened on the cylindrical shell in the annular housing, the end face of internal friction disc 9 is respectively equipped with the end face tooth that cooperatively interacts with the end face that is provided with the external friction dish 7 on it, external friction dish 7 is provided with closing sleeve 2, closing sleeve 2 is embedded with the cylindrical shell 5 with the internal thread 16 that matches with bolt, closing sleeve 2 is provided with down protruding and coaxial with cylindrical shell 5 ring body 15, the outer wall of the inwall of ring body and external friction dish is respectively equipped with convex body 1 and the cell body 3 that cooperatively interacts, the inside of external friction dish is provided with annular boss 14, annular boss 14, the inwall of external friction dish and closing sleeve have constituted the chamber that holds spring body 4, the lower end and the annular boss of spring body offset, and the closing sleeve periphery is provided with tightens body 17.Closing sleeve is provided with cover plate 19, and cover plate is provided with the through hole 18 that the ring body for closing sleeve passes.
During use, clockwise rotate closing sleeve and drive the rotation of external friction dish, thereby cause internal friction disc to clockwise rotate eccentric wheel is and then rotated, eccentric wheel promotes guide plate vertically to the direction motion away from sprocket wheel 1, and chain is tightened up.Otherwise chain is loosened.After chain is tightened to a certain degree, begin to skid between external friction dish and the internal friction disc, after this clockwise rotate closing sleeve again till tightly fastening guide plate.Like this, under the operation of a mechanism, both reached tensioning purpose, reached the purpose that compresses simultaneously again guide plate to saw chain, easy and simple to handle.
Claims (10)
1, a kind of chain saw chain tension device, comprise that an eccentric wheel that causes the guide plate longitudinal movement and one one end are fixed on the bolt on the deceleration box, it is characterized in that described eccentric wheel (12) top is provided with internal friction disc formed integrally therewith (9), the upper-end surface of described internal friction disc (9) is provided with down locking member, and described bolt (6) passes the central through bore of internal friction disc; External friction dish (7) is located at the top of internal friction disc (9), and the lower end surface of described external friction dish (7) is provided with the last locking member that matches with following locking member, which is provided with closing sleeve (2); Be provided with cylindrical shell (5) in the described closing sleeve (2), which is provided with down protruding and coaxial with described cylindrical shell (5) ring body (15), the inwall of described ring body is provided with convex body (1) and the cell body (3) that cooperates with the outer wall of external friction dish, be provided with spring body (4) between external friction dish and closing sleeve, be provided with the internal thread (16) that matches with described bolt in the described cylindrical shell (5).
2, chain saw chain tension device according to claim 1 is characterized in that described closing sleeve is made of injection molding body.
3, chain saw chain tension device according to claim 1 and 2, it is characterized in that being provided with between described guide plate and internal friction disc slider guide (20), described slider guide is provided with block body (21), and described eccentric wheel causes the guide plate longitudinal movement by cooperating with described block body.
4, chain saw chain tension device according to claim 1 and 2, the inside that it is characterized in that described external friction dish is provided with annular boss (14), the inwall of described annular boss (14), external friction dish and described closing sleeve have constituted the chamber that holds described spring body (4), and the lower end of described spring body and described annular boss offset.
5, chain saw chain tension device according to claim 1 and 2, the lower end that it is characterized in that described internal friction disc is provided with the annular housing (11) that is made of internal friction disc and described cylindrical shell, is provided with the spring collar (10) that is fastened on the described cylindrical shell in the described annular housing.
6, chain saw chain tension device according to claim 1 and 2 is characterized in that described closing sleeve periphery is provided with to tighten body (17).
7, chain saw chain tension device according to claim 1 and 2 is characterized in that described closing sleeve is provided with cover plate (19), and described cover plate is provided with the through hole (18) that the ring body for described closing sleeve passes.
8, chain saw chain tension device according to claim 1 and 2, the length that it is characterized in that described closing sleeve cylindrical shell is exposed to length on the deceleration box greater than described bolt.
9, chain saw chain tension device according to claim 1 and 2 is characterized in that described cylindrical shell and closing sleeve are injected into one.
10, chain saw chain tension device according to claim 3 is characterized in that described cylindrical shell and closing sleeve are injected into one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420082111 CN2725631Y (en) | 2004-08-20 | 2004-08-20 | Chainsaw chain tensioning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420082111 CN2725631Y (en) | 2004-08-20 | 2004-08-20 | Chainsaw chain tensioning device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2725631Y true CN2725631Y (en) | 2005-09-14 |
Family
ID=35040350
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420082111 Expired - Fee Related CN2725631Y (en) | 2004-08-20 | 2004-08-20 | Chainsaw chain tensioning device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2725631Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102441920A (en) * | 2010-10-01 | 2012-05-09 | 苏州宝时得电动工具有限公司 | Chain saw |
| CN104279281A (en) * | 2014-07-23 | 2015-01-14 | 九龙坡区东杰机械厂 | Mini-tiller tensioning wheel mechanism |
-
2004
- 2004-08-20 CN CN 200420082111 patent/CN2725631Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102441920A (en) * | 2010-10-01 | 2012-05-09 | 苏州宝时得电动工具有限公司 | Chain saw |
| CN102441920B (en) * | 2010-10-01 | 2014-10-08 | 苏州宝时得电动工具有限公司 | Chain saw |
| CN104279281A (en) * | 2014-07-23 | 2015-01-14 | 九龙坡区东杰机械厂 | Mini-tiller tensioning wheel mechanism |
| CN104279281B (en) * | 2014-07-23 | 2017-12-12 | 重庆兆方工贸有限公司 | Mini-tiller tension pulley mechanism |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |