CN104265798A - Low-torque safety clutch - Google Patents
Low-torque safety clutch Download PDFInfo
- Publication number
- CN104265798A CN104265798A CN201410512407.2A CN201410512407A CN104265798A CN 104265798 A CN104265798 A CN 104265798A CN 201410512407 A CN201410512407 A CN 201410512407A CN 104265798 A CN104265798 A CN 104265798A
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- transmission shaft
- steel ball
- cavity
- transmission
- hole
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- Transmission Devices (AREA)
- One-Way And Automatic Clutches, And Combinations Of Different Clutches (AREA)
Abstract
The invention discloses a low-torque safety clutch which comprises a transmission shaft and a transmission gear fixedly connected to the transmission shaft, and is characterized in that a cavity is formed inside the transmission gear; at least three through holes communicated with the cavity are formed in the transmission gear; the through hole is internally provided with a steel ball, a compression spring and a fastening screw sequentially from inside to outside; the transmission shaft which is located in the cavity is provided with sunken pits which correspond to the positions of the through holes and are used for clamping the steel ball. The sunken pits located on the transmission shaft react with the steel ball and spring both mounted in the radial hole of the transmission gear so as to provide an overload protection function. In a low-torque working state, the transmission shaft drives the steel ball therein and the transmission gear to rotate through the sunken pits so as to realize the transmission purpose. In an abnormal working state, the torque increases sharply; at the moment, the steel ball slips on the transmission shaft and cannot drive the transmission gear to rotate, so that the power is cut off safely, and a stepping motor and subsequent transmission mechanisms are protected.
Description
Technical field
The present invention relates to a kind of mechanical transmission component, be specifically related to a kind of little torque safety clutch.
Background technique
The part combination that the outer speed variator system of bicycle is made up of how fast sprocket wheel, how fast flywheel, how fast chain and front and back derailleur etc.In the process of the outer speed variator system comprehensive performance test of development, need the safety clutch designing a kind of compact dimensions, little moment of torsion, this clutch is arranged among derailleur drive unit.In the process of test, the effect of derailleur drive unit is the control action of simulation staff.
Usually, people be in process by bike bimanual thumb drives derailleur to change velocity ratio.Certain also useful turning handle hand-driven, but no matter adopt any maneuverability pattern, all to meet two conditions: the first, by the restriction of the control force of hand, require that manipulation process is lighter; Two is gear shift, location will be accurately and reliably.About the size of derailleur steering force, temporary without unified standard at present, the main quality relying on the feel of people to judge its performance.When people adopt the both hands of test stand simulation people to handle derailleur time, the size of its driving force should be similar with manual control power, and can regulate as required.If be equipped with little torque sensor, then can measure the size of operating torque, thus provide a kind of objective, effective means for the sensitivity measuring outer speed variator system.
Carrying out testing property with the external speed variator system of test stand is that simulated roadway is ridden test in fact.Every various problems that may occur in road rides test, there will be equally when bench test.Wherein just comprise the abnormal conditions such as de-chain, now Transmitted chains will be stuck, and front and back derailleur cannot work.In this case, a kind of little torque safety clutch be arranged in derailleur drive unit is just needed will to cut off the transmission of power, protection stepper motor and follow-up driving mechanism.
Summary of the invention
The object of the present invention is to provide a kind of little torque safety clutch, structure is simple, safe and reliable, can be cut off by power safety when bench test, protection stepper motor and follow-up driving mechanism.
For achieving the above object, technological scheme of the present invention is: little torque safety clutch, comprise transmission shaft, the driving gear be fixed on transmission shaft, described driving gear inside is provided with a cavity, described driving gear offers at least three with the through hole of cavity connects, be provided with steel ball, stage clip and lock screw successively from inside to outside in described through hole; Described transmission shaft is arranged in cavity corresponding lead to the hole site place and is provided with the heavy hole that card puts steel ball.
When adopting technique scheme, be arranged in heavy hole on transmission shaft by these and be arranged on the steel ball of driving gear radial hole, spring interacts, and provides overload protection function.Under the working state of low torque, transmission shaft drives steel ball wherein and driving gear to rotate by heavy hole, reaches the object of transmission.Under abnormal operating state, torque sharply increases, and now, steel ball skids on transmission shaft, and nutating gear can not be with to rotate, thus plays power safety cut-out, the effect of protection stepper motor and follow-up driving mechanism.
Further, described transmission shaft is positioned at the partial cross section of cavity for square, and each plane is provided with a heavy hole; The number of openings that described driving gear is opened is four.Being set as foursquare cross section can transmitting torque better, makes whole clutch more safe, practical.
Further, the diameter in described heavy hole is greater than the radius of steel ball.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation:
Fig. 1 is the structural representation of the present invention's little torque safety clutch embodiment;
Fig. 2 be in Fig. 1 A-A to sectional structure schematic diagram.
Embodiment
As depicted in figs. 1 and 2, the little torque safety clutch of the present invention, is used in the external speed variator system of test stand and carries out in testing property.The transmission shaft 1 be connected with clutch end, on transmission shaft 1, be fixedly connected with driving gear 2, had a cavity in the inside of driving gear 2, transmission shaft 1 is positioned at one section of cavity for square axis, and namely cross section be square.Driving gear 2 offers with cavity corresponding part four with the through hole of cavity connects, be provided with steel ball 3, stage clip 4 and lock screw 5 from inside to outside successively in through-holes.Transmission shaft 1 is arranged in cavity corresponding lead to the hole site place standard twist drill and gets out the heavy hole that card puts steel ball 3, and the diameter in heavy hole is greater than the radius of steel ball 3.
By the heavy hole be arranged on transmission shaft 1 be arranged on the steel ball 3 of driving gear 2 radial hole, stage clip 4 interacts, and provides overload protection function.Under the working state of low torque, transmission shaft 1 drives steel ball 3 wherein to rotate with driving gear 2 by heavy hole, reaches the object of transmission.Under abnormal operating state, torque sharply increases, and now, steel ball 3 skids on transmission shaft 1, and nutating gear 2 can not be with to rotate, thus plays power safety cut-out, the effect of protection stepper motor and follow-up driving mechanism.
Above-described is only the preferred embodiment of the present invention; should be understood that; for a person skilled in the art; under the prerequisite not departing from structure of the present invention; some distortion and improvement can also be made; these also should be considered as protection scope of the present invention, and these all can not affect effect of the invention process and practical applicability.
Claims (3)
1. little torque safety clutch, comprise transmission shaft, the driving gear be fixed on transmission shaft, it is characterized in that, described driving gear inside is provided with a cavity, described driving gear offers at least three with the through hole of cavity connects, be provided with steel ball, stage clip and lock screw successively from inside to outside in described through hole; Described transmission shaft is arranged in cavity corresponding lead to the hole site place and is provided with the heavy hole that card puts steel ball.
2. little torque safety clutch according to claim 1, is characterized in that, described transmission shaft is positioned at the partial cross section of cavity for square, and each plane is provided with a heavy hole; The number of openings that described driving gear is opened is four.
3. little torque safety clutch according to claim 1, is characterized in that, the diameter in described heavy hole is greater than the radius of steel ball.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410512407.2A CN104265798A (en) | 2014-09-29 | 2014-09-29 | Low-torque safety clutch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410512407.2A CN104265798A (en) | 2014-09-29 | 2014-09-29 | Low-torque safety clutch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104265798A true CN104265798A (en) | 2015-01-07 |
Family
ID=52157354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410512407.2A Pending CN104265798A (en) | 2014-09-29 | 2014-09-29 | Low-torque safety clutch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104265798A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104669291A (en) * | 2015-03-13 | 2015-06-03 | 中国科学院自动化研究所 | Bionic four-finger-shaped closed mechanical hand |
| CN106402197A (en) * | 2015-07-10 | 2017-02-15 | 陈超 | Rotary protection device |
| CN107486290A (en) * | 2017-10-18 | 2017-12-19 | 金箍棒工业产品设计江阴有限公司 | A kind of solid, powdery grinder |
| CN107654532A (en) * | 2017-11-19 | 2018-02-02 | 东莞市松研智达工业设计有限公司 | A kind of output torque is constant and the increased torque limiter of velocity of rotation |
| CN108211437A (en) * | 2018-01-23 | 2018-06-29 | 金山环保集团有限公司 | A kind of single track mud scraper |
| CN108547237A (en) * | 2018-04-25 | 2018-09-18 | 绵阳市维博电子有限责任公司 | A kind of gate inhibition's lifeline |
| CN110552976A (en) * | 2019-09-18 | 2019-12-10 | 郭水春 | middle connection speed control device for rotary driving |
| CN110614181A (en) * | 2019-10-15 | 2019-12-27 | 杨淑丽 | Fixed type moving device for pipeline parts for spraying paint inside pipeline hole structure |
| CN114857437A (en) * | 2022-05-09 | 2022-08-05 | 重庆工程学院 | Vehicle traffic monitoring device |
-
2014
- 2014-09-29 CN CN201410512407.2A patent/CN104265798A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104669291A (en) * | 2015-03-13 | 2015-06-03 | 中国科学院自动化研究所 | Bionic four-finger-shaped closed mechanical hand |
| CN106402197A (en) * | 2015-07-10 | 2017-02-15 | 陈超 | Rotary protection device |
| CN106402197B (en) * | 2015-07-10 | 2019-08-16 | 南通北外滩建设工程有限公司 | A kind of rotation protection device |
| CN107486290A (en) * | 2017-10-18 | 2017-12-19 | 金箍棒工业产品设计江阴有限公司 | A kind of solid, powdery grinder |
| CN107654532A (en) * | 2017-11-19 | 2018-02-02 | 东莞市松研智达工业设计有限公司 | A kind of output torque is constant and the increased torque limiter of velocity of rotation |
| CN108211437A (en) * | 2018-01-23 | 2018-06-29 | 金山环保集团有限公司 | A kind of single track mud scraper |
| CN108547237A (en) * | 2018-04-25 | 2018-09-18 | 绵阳市维博电子有限责任公司 | A kind of gate inhibition's lifeline |
| CN108547237B (en) * | 2018-04-25 | 2020-07-14 | 绵阳市维博电子有限责任公司 | Entrance guard railing device |
| CN110552976A (en) * | 2019-09-18 | 2019-12-10 | 郭水春 | middle connection speed control device for rotary driving |
| CN110552976B (en) * | 2019-09-18 | 2021-11-09 | 烟台富利达索道工程有限公司 | Middle connection speed control device for rotary driving |
| CN110614181A (en) * | 2019-10-15 | 2019-12-27 | 杨淑丽 | Fixed type moving device for pipeline parts for spraying paint inside pipeline hole structure |
| CN114857437A (en) * | 2022-05-09 | 2022-08-05 | 重庆工程学院 | Vehicle traffic monitoring device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150107 |
|
| WD01 | Invention patent application deemed withdrawn after publication |