CN2077576U - Self-tension device for driving belt of phonograph - Google Patents
Self-tension device for driving belt of phonograph Download PDFInfo
- Publication number
- CN2077576U CN2077576U CN 90222507 CN90222507U CN2077576U CN 2077576 U CN2077576 U CN 2077576U CN 90222507 CN90222507 CN 90222507 CN 90222507 U CN90222507 U CN 90222507U CN 2077576 U CN2077576 U CN 2077576U
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- CN
- China
- Prior art keywords
- driving belt
- tensioning
- phonograph
- belt
- self
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Abstract
The utility model discloses a self-tension device for the driving belt of a phonograph, comprising a tension wheel, a tension swing plate, a spring and a fixed guide. The self-tension device is arranged near the driving wheel of the phonograph with the tension wheel tightly pressed on the driving belt, so that the driving belt tensioning force can basically remain unchanged for a long time. The self-tension device can eliminate the start slip phenomenon of the drive belt, ensure the accuracy of a drive system and effectively control wow and flutter influences caused by the creep deformation of the belt to ensure requirements for the reproduction quality of the phonograph.
Description
The utility model relates to the automatic regulating apparatus of kinematic train, particularly a kind of be used for the electric phonograph driving belt from tensioning system.
In the existing electric phonograph, great majority are to adopt belt transmission structure.Belt gear in the electric phonograph generally is by drive motor direct connection driving wheel, directly drags belt pulley with the disc record rigid attachment by belt, and disc record can be rotated reposefully with low speed.The driving belt of electric phonograph can be slowly elongated owing to produce the deformation of creep in using for a long time, and like this, belt tension can descend, and causes the fluctuation of disc record speed difference, directly influences the playback frequency characteristic.In addition, because the electric phonograph belt gear generally all adopts the direct transmission of one-level, its ratio of gear is just big like this, requires the diameter of driving wheel less, and its resulting cornerite is also just very little so.So under the situation that belt tension descends, local phenomenon of skidding directly influences the flutter of electric phonograph and the requirement of speed governing in skidding or turn round in the time of will occurring starting, and has seriously influenced the reproduction quality of electric phonograph, even disc record stall phenomenon occurred.
The purpose of this utility model be to provide in order to overcome above-mentioned weak point a kind of electric phonograph driving belt from tensioning system, it can make the tensile force of electric phonograph driving belt remain unchanged substantially in considerable time.
The utility model is achieved in that the electric phonograph driving belt is made up of stretching pulley (1), tensioning pendulum plate (2), spring (3), resting guide (4) from tensioning system, spring (3) is installed between tensioning pendulum plate (2) and the resting guide (4) in the formed inner chamber (5), and stretching pulley (1) is sleeved on tensioning and puts on the sliding axle (2a) of plate (2).Resting guide (4) is circular shape, its right upper portion has a short slot (4d), an aperture (4e) is arranged in the short slot (4d), there is a semi-circular recesses (4c) in short slot (4d) left side, in the middle of the groove (4c) axis of swing (4a) is arranged, respectively there is a mounting hole (4b) at the left and right both ends of resting guide (4).Tensioning pendulum plate (2) middle lower portion has a short slot (2d), an aperture (2b) is arranged in the short slot (2d), there is a circular hole (2c) in tensioning pendulum plate (2) left side, and there is a sliding axle (2a) on its right side, and there is a little round platform (2e) sliding axle (2a) lower end.Stretching pulley (1) is dolioform, and there is a circular hole (1a) at its center.The material of stretching pulley (1) can be rubber or plastics, and the material of tensioning pendulum plate (2), resting guide (4) can be plastics.
On near the casing of electric phonograph driving belt tensioning system is installed in driving wheel (6), its stretching pulley (1) can freely rotate around sliding axle (2a), utilize the elastic force of spring, stretching pulley (1) is pressed on the driving belt (7) with certain pressure from start to finish, make driving belt (7) in transmission process, remain a metastable tensile force, make the disc record (8) can be with the low speed smooth rotation.
Advantage of the present utility model is to load onto behind tensioning system near the electric phonograph driving belt, can make belt tension in the transmission in considerable time, even can keep constant substantially in whole useful life period at electric phonograph; Improved transmission condition greatly owing to increased the transmission cornerite, disappeared and located the starting skidding, guaranteed the kinematic train precision and controlled the wow and flutter influence that is caused because of the belt deformation of creep effectively, thereby guaranteed the requirement of electric phonograph reproduction quality.
Fig. 1 is that the utility model separates each part three dimensional map of back;
Fig. 2 is the utility model front view;
Fig. 3 is the utility model rigging position synoptic diagram in electric phonograph.
Below by embodiment the utility model is further elaborated.
By injection mo(u)lding stretching pulley shown in Figure 1 (1), tensioning pendulum plate (2), resting guide (4).Stretching pulley (1) slip cap is contained on the sliding axle (2a) of tensioning pendulum plate (2), its termination is with sealing riveting, spring (3) embeds to be put in the formed inner chamber of short slot (2d) (5) of plate (2) by the short slot (4d) and the tensioning of resting guide (4), plate (2) slip cap is put in tensioning packs on the axis of swing (4a) of resting guide (4), insert respectively in the aperture (4e) of the aperture (2b) of tensioning pendulum plate (2) and resting guide (4) at spring (3) two ends, then axis of swing (4a) termination is sealed riveting, finish whole combine and assemble, utilize the elastic force of spring (3) can obtain fixing tensile force from tensioning system.The material of the stretching pulley of present embodiment (1), tensioning pendulum plate (2), resting guide (4) adopts plastics.
This is screwed near the electric phonograph base the driving wheel (6) from two mounting holes (4b) of tensioning system by resting guide (4), stretching pulley (1) leans on the elastic force of spring (3) from start to finish, be pressed on the driving belt (7) tensile force that the belt (7) in the transmission is kept relative stability automatically with certain pressure.
Claims (5)
1, a kind of electric phonograph driving belt is from tensioning system, it is characterized in that it is made up of stretching pulley (1), tensioning pendulum plate (2), spring (3), resting guide (4), spring (3) is installed between tensioning pendulum plate (2) and the resting guide (4) in the formed inner chamber (5), and stretching pulley (1) is sleeved on tensioning and puts on the sliding axle (2a) of plate (2).
2, electric phonograph driving belt according to claim 1 is from tensioning system, it is characterized in that described resting guide (4) is circular shape, its right upper portion has a short slot (4d), an aperture (4e) is arranged in the short slot (4d), there is a semi-circular recesses (4c) in short slot (4d) left side, in the middle of the groove (4c) axis of swing (4a) is arranged, respectively there is a mounting hole (4b) at the left and right both ends of resting guide (4).
3, electric phonograph driving belt according to claim 1 is from tensioning system, it is characterized in that described tensioning pendulum plate (2) middle lower portion has a short slot (2d), an aperture (2b) is arranged in the short slot (2d), there is a circular hole (2c) in tensioning pendulum plate (2) left side, there is a sliding axle (2a) on its right side, and there is a little round platform (2e) sliding axle (2a) lower end.
4, electric phonograph driving belt according to claim 1 is characterized in that from tensioning system described stretching pulley (1) is dolioform, and there is a circular hole (1a) at its center.
5, electric phonograph driving belt according to claim 1 is from tensioning system, and the material that it is characterized in that stretching pulley (1) can be rubber or plastics, and the material of tensioning pendulum plate (2), resting guide (4) can be plastics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90222507 CN2077576U (en) | 1990-10-21 | 1990-10-21 | Self-tension device for driving belt of phonograph |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90222507 CN2077576U (en) | 1990-10-21 | 1990-10-21 | Self-tension device for driving belt of phonograph |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2077576U true CN2077576U (en) | 1991-05-22 |
Family
ID=4900433
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90222507 Withdrawn CN2077576U (en) | 1990-10-21 | 1990-10-21 | Self-tension device for driving belt of phonograph |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2077576U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6884191B2 (en) | 2000-05-19 | 2005-04-26 | Daihatsu Motor Co., Ltd. | Stepless speed change unit |
-
1990
- 1990-10-21 CN CN 90222507 patent/CN2077576U/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6884191B2 (en) | 2000-05-19 | 2005-04-26 | Daihatsu Motor Co., Ltd. | Stepless speed change unit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| 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 |