CN2789509Y - Wedge friction slipped output axle - Google Patents
Wedge friction slipped output axle Download PDFInfo
- Publication number
- CN2789509Y CN2789509Y CN 200520071424 CN200520071424U CN2789509Y CN 2789509 Y CN2789509 Y CN 2789509Y CN 200520071424 CN200520071424 CN 200520071424 CN 200520071424 U CN200520071424 U CN 200520071424U CN 2789509 Y CN2789509 Y CN 2789509Y
- Authority
- CN
- China
- Prior art keywords
- output shaft
- plastic gear
- friction
- tenon
- rubbing surface
- 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.)
- Expired - Lifetime
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Abstract
The utility model relates to a tenon-shaped and wedge-shaped friction slippage type output shaft, which comprises a metal output shaft, a plastic gear and an elastic friction sheet, wherein the friction surface of the plastic gear is a tenon-shaped friction surface; the friction surface of the metal output shaft is a wedge-shaped friction surface; the tenon-shaped friction surface in inserted on the wedge-shaped friction surface; the elastic friction sheet is pressed on the other surface of the plastic gear and fixedly connected with the metal output shaft; the slippage friction surface of the plastic gear is surrounded by the slippage friction surface of the metal output shaft, thereby, the friction area is enlarged to enable the output force moment to be enlarged and the force moment to be stable; horizontal rising force of an inner barrel-shaped surface of the metal output shaft which acts on the plastic gear is counteracted to be equal to zero by an outer barrel-shaped surface of the metal output shaft, so the plastic gear is effectively protected. The utility model has the advantages of simple and reasonable structure, low cost, large output force moment, stable performance, long service life, etc. The utility model is suitable to be matched with a miniature stepper motor, a stepper motor, a synchronous motor, a speed reduction motor, etc. which need rotation mechanisms having the function of overload protection to be used.
Description
Technical field
The utility model relates to the improvement that a kind of micro-step motor, stepper motor, synchronous machine, reducing motor etc. need have the matching used friction slip formula of the rotating machinery output shaft of overload protection function, belongs to the coupling field.
Background technique
In order to protect rotating machinerys such as motor when transshipping, can not damage, just need between motor and load, be provided with friction slip formula output shaft.Existing friction slip formula output shaft mainly contains to be passed by injection-molded plastic gear 2 and two metal friction sheets 3 by mesopore of mesopore by a metal shaft 1 series connection to be formed, the described output axle head that is connected with plastic gear is a stepped shaft, its both ends of the surface respectively add a metallic shim, and the end by the riveting axle makes it connect into whole structure (as shown in Figure 1), there is the parallelism of cost height and plastic gear both ends of the surface in this kind linkage structure, the length of axle, lot of unstable factors such as the geometrical dimension tolerances of pad, influence the size of output torque, have the unmanageable defective of friction torque.Another kind of friction slip formula output shaft, it is made of metal shaft 4 and the plastic gear 5 disposable integral body that are injection molded into, its output shaft that is connected with plastic gear is ladder cylindrical (as shown in Figure 2), the defective of this structure is: to injection moulding processing request height, occur the situation of unstable properties such as plastic gear cracking phenomena easily; Injection moulding cost height; Friction torque can not detect at any time, can cause the loss from spoilage rate excessive.
Summary of the invention
The purpose of this utility model is in order to overcome the deficiency of above-mentioned existing friction slip formula output shaft, design a kind of simple and reasonable, cost is low, output torque is big, the tenon of stable performance, long service life is carved type friction slip formula output shaft.
Tenon of the present utility model is carved type friction slip formula output shaft, mainly be on the basis that comprises the friction slip formula output shaft that metal output shaft, plastic gear and elastic-friction sheet are formed, change the rubbing surface that skids between plastic gear and the metal output shaft into the tenon wedge by plane shape, its structure is that the rubbing surface of plastic gear is a tenon shape rubbing surface, the rubbing surface of metal output shaft is the wedge rubbing surface, tenon shape rubbing surface is inserted on the wedge rubbing surface, and the elastic-friction sheet is fitted on another rubbing surface of plastic gear and with the metal output shaft fixedlys connected.
Tenon of the present utility model is carved type friction slip formula output shaft; owing to change the rubbing surface that skids between plastic gear and the metal output shaft into tenon wedge structure by plane-shaped structure; the rubbing surface that skids of plastic gear is surrounded wherein by the rubbing surface that skids of metal output shaft; both increased friction area; output torque is increased; moment is stable; the horizontal tension that Dou face in the metal output shaft can be acted on plastic gear is again all offset by the outer Dou face of metal output shaft and is equalled zero; effectively protect plastic gear cracking when axial pressure is excessive, also can not occur and damaged phenomenon; have simple and reasonable; cost is low; output torque is big; stable performance; advantages such as long service life are adapted at micro-step motor; stepper motor; synchronous machine; reducing motors etc. need have supporting use on the rotating machinery of overload protection function.
Description of drawings
Accompanying drawing 1 is a kind of structural representation of existing friction slip formula output shaft;
Accompanying drawing 2 is another kind of structural representations of existing friction slip formula output shaft;
Accompanying drawing 3 is structural representations of the present utility model;
Accompanying drawing 4 is structural representations of plastic gear in the accompanying drawing 3;
Accompanying drawing 5 is structural representations of metal output shaft in the accompanying drawing 3.
Embodiment
Referring to accompanying drawing 3,6 among the figure is metal output shafts, the 7th, and plastic gear, the 8th, elastic-friction sheet.The rubbing surface of described plastic gear 7 is a tenon shape rubbing surface, and the rubbing surface of metal output shaft 6 is the wedge rubbing surface, and tenon shape rubbing surface is inserted on the wedge rubbing surface, and elastic-friction sheet 8 is fitted in the another side of plastic gear and fixedlys connected with the metal output shaft.For guaranteeing effective area of contact bigger between plastic gear and the metal output shaft, the tenon shape external taper angle (referring to the β in the accompanying drawing 4 1) of described tenon shape rubbing surface is equal to or greater than the wedge inner taper angle (referring to the β in the accompanying drawing 5 2) of wedge rubbing surface.Described elastic-friction sheet 8 can be selected plane shape elastic-friction sheet as required for use or the arc surfaced elastic-friction sheet of certain radian is arranged.Elastic-friction sheet 8 can be fixed on the metal output shaft 6 with methods such as riveted joints, provides a kind of preload pressure for compressing plastic gear.The rubbing surface that skids between gear and the axle is to utilize tenon wedge reinforcement principle, promptly little power that is parallel to the center of gravity vertical line can produce the positive pressure of a generation frictional force of having amplified separately on the rubbing surface that skids between gear and the axle, thereby can obtain big rated output torque.During machine operation, when load greater than the design rated load the time, plastic gear 7 will skid between metal output shaft 6 and elastic-friction sheet 8 automatically and protect motor.Because the rubbing surface that skids of plastic gear 7 is surrounded wherein by the rubbing surface that skids of metal output shaft 6; both increased friction area; output torque is increased; moment is stable; the horizontal tension that Dou face in the metal output shaft can be acted on plastic gear is again all offset by the outer Dou face of metal output shaft and is equalled zero; effectively protect plastic gear cracking when axial pressure is excessive, also can not occur and damaged phenomenon; have simple and reasonable; cost is low; output torque is big; stable performance; advantages such as long service life are adapted at micro-step motor; stepper motor; synchronous machine; reducing motors etc. need have supporting use on the rotating machinery of overload protection function.
Claims (4)
1, a kind of tenon is carved type friction slip formula output shaft, comprise metal output shaft, plastic gear and elastic-friction sheet, the rubbing surface that it is characterized in that plastic gear is a tenon shape rubbing surface, the rubbing surface of metal output shaft is the wedge rubbing surface, tenon shape rubbing surface is inserted on the wedge rubbing surface, and the elastic-friction sheet is fitted in the another side of plastic gear and fixedlys connected with the metal output shaft.
2, tenon as claimed in claim 1 is carved type friction slip formula output shaft, it is characterized in that the tenon shape external taper angle of tenon shape rubbing surface is equal to or greater than the wedge inner taper angle of wedge rubbing surface.
3, tenon as claimed in claim 2 is carved type friction slip formula output shaft, it is characterized in that the angle at the tenon shape external taper angle of tenon shape rubbing surface is spent less than 90.
4, carve type friction slip formula output shaft as claim 1 or 2 or 3 described tenons, it is characterized in that the elastic-friction sheet is plane shape elastic-friction sheet or arc surfaced elastic-friction sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520071424 CN2789509Y (en) | 2005-05-10 | 2005-05-10 | Wedge friction slipped output axle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520071424 CN2789509Y (en) | 2005-05-10 | 2005-05-10 | Wedge friction slipped output axle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2789509Y true CN2789509Y (en) | 2006-06-21 |
Family
ID=36789840
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520071424 Expired - Lifetime CN2789509Y (en) | 2005-05-10 | 2005-05-10 | Wedge friction slipped output axle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2789509Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103443444A (en) * | 2011-01-26 | 2013-12-11 | 罗伯特·博世有限公司 | Starting device having overload safety mechanism |
-
2005
- 2005-05-10 CN CN 200520071424 patent/CN2789509Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103443444A (en) * | 2011-01-26 | 2013-12-11 | 罗伯特·博世有限公司 | Starting device having overload safety mechanism |
| CN103443444B (en) * | 2011-01-26 | 2016-04-20 | 罗伯特·博世有限公司 | With the starting arrangement of overload safety |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: CHANGZHOU LESHI LEILI ELECTRICAL EQUIPMENT CO., LT Free format text: FORMER OWNER: CHANGZHOU LEILI ELECTRICAL EQUIPMENT CO., LTD. Effective date: 20100706 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 213100 XIATANGFANGZHUANG, QICHUYAN DISTRICT, CHANGZHOU CITY, JIANGSU PROVINCE TO: 213011 QIANJIA INDUSTRIAL PARK, YAOGUAN TOWN, WUJIN DISTRICT, CHANGZHOU CITY, JIANGSU PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20100706 Address after: 213011 Changzhou City, Wujin Province, the town of remote view of the town of Home Industrial Park Patentee after: Changzhou Leshi Leili Electrical Appliance Co., Ltd. Address before: 213100, Jiangsu, Changzhou province Qishuyan Tong Fang Village Patentee before: Leili Electrical Equipment. Co., Ltd., Changzhou |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20150510 Granted publication date: 20060621 |