CN203796898U - Teeth for sprocket in chain transmission - Google Patents
Teeth for sprocket in chain transmission Download PDFInfo
- Publication number
- CN203796898U CN203796898U CN201420113941.1U CN201420113941U CN203796898U CN 203796898 U CN203796898 U CN 203796898U CN 201420113941 U CN201420113941 U CN 201420113941U CN 203796898 U CN203796898 U CN 203796898U
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- CN
- China
- Prior art keywords
- chain
- tooth
- teeth
- sprocket
- pitch circle
- 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 - Fee Related
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- Gears, Cams (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
Abstract
The utility model relates to teeth for a sprocket in chain transmission. A tooth groove of each sprocket tooth comprises a cycloid closed to the top of the tooth and an involute curve near one pitch circle above an intertooth space arc; the cycloid close to the top of each tooth and the involute curve near the pitch circle above the intertooth space arc are tangent at the connection position and form a smooth connection compound curve. Because one involute is near each pitch circle, the radius of curvature is large, the contact stress generated when the teeth are meshed with a roller of a chain or a chain plate of the tooth-shaped chain is small, pitting corrosion and abrasion cannot happen easily, and the service life of the sprocket and the chain is prolonged. Meanwhile, because the contact force is reduced, large sliding friction will not be caused on the tooth surfaces either, and the transmission efficiency is also improved; because cycloid tooth grooves are adopted for the portions, with small contact force, close to the tops of the teeth, the abrasion to the portions is even. The sprocket tooth grooves have good adaptability to disjointing caused by pitch increment and ascent, and thus the sprocket tooth grooves are suitable for transmission of a hoisting chain or a traction chain with a large load.
Description
Technical field
The utility model relates to a kind of gear teeth, is mainly used in the sprocket wheel in roller chain transmission device, also can be for silent chain transmission.
Background technique
Roller chain transmission device is mainly used in the mechanical transmission that low speed, heavy duty, reliable operation, overload capacity are strong and transmitted power is large, dust is many, have the more severe occasion of the environment such as pollution.Because in above-mentioned workplace, that roller chain transmission device has with respect to other transmission device is simple in structure, easy processing, overhaul the advantages such as convenient.The engagement of roller chain and sprocket belongs to non-conjugated engagement, in GB/T1243-97 or GB1244-85, do not stipulate concrete sprocket tooth form, only stipulated in the lit range of maximum tooth gap from and minimum tooth gap form, all each section of smoothed curves that forms teeth groove within the scope of this all can adopt, can meet usage requirement, so the design of sprocket indentations can have larger flexibility, generally between the various teeth groove that meet above-mentioned requirements, also can exchange.Roller chain transmission device is generally comprised of chain and sprocket wheel, the roller of chain and the engagement of the teeth groove of sprocket wheel, general smoothed curve forms the teeth groove of sprocket wheel, be positioned near the radius of curvature of pitch circle less, according to Hertz theory, the roller of sprocket wheel and chain or the carrier bar of chain produce larger contact stress when this section meshes near pitch circle, make this section easily occur rippling, wearing and tearing, finally make the gear teeth of this sprocket wheel not use.Due to the carrier bar of the roller with chain or silent chain chain, near pitch circle, to produce contact stress during this section of engagement larger, makes this section of flank of tooth easily produce larger sliding friction, causes the transmission efficiency of whole chain-driven unit to reduce.
Summary of the invention
The purpose of this utility model be to provide a kind of long service life, bearing capacity higher, adapt to pitch and become the strong and transmission of large ability more stably for the gear teeth of chain-driven unit middle sprocket.
Scheme of the present utility model is: a kind of gear teeth for roller chain transmission device middle sprocket, teeth groove comprises the cycloidal curve near tooth top portion, near and the involute curve above pitch circle of roller seating space circular arc, cycloid and near involute pitch circle near tooth top portion are tangent in joint, the compound curve being smoothly connected that forms.
The further technological scheme of the utility model is: near the tooth-shape angle of the involute curve described pitch circle, and can suitably select according to the size of load the size of tooth-shape angle, tooth-shape angle to be preferably 24 °.
Adopt the sprocket wheel of this compound teeth groove owing to being involute curve near pitch circle, radius of curvature is larger, and the contact stress producing during with the roller of chain or the engagement of the carrier bar of silent chain chain is less, is difficult for occurring spot corrosion, wearing and tearing, the working life of having improved sprocket wheel; Due to the minimizing of contact force, the flank of tooth does not have larger sliding friction yet simultaneously, and transmission efficiency is also improved; Contact force is little and adopt cycloid gullet near tooth top portion in addition, makes this section of wearing and tearing more even, and is conducive to the engaging-in of chain and nibbles out.This compound teeth groove takes full advantage of cycloid and involute curve advantage separately in transmission process, and this sprocket indentations becomes and climbs greatly that causing disconnects has good adaptive capacity chain pitch; This kind of optimization sprocket wheel compound curve teeth groove is applicable to larger load chain, the tow chain transmission of load.
The beneficial effects of the utility model are: bearing capacity is higher, working life is longer, adapt to pitch and become that large ability is strong and transmission is more steady.
Accompanying drawing explanation
Fig. 1 is the mesh schematic representation of the utility model roller chain transmission device preferred embodiment
Fig. 2 is the I part enlarged diagram of mechanism shown in Fig. 1
Embodiment
Roller chain transmission device as shown in Figure 1, is comprised of sprocket wheel 1 and chain 2, and the gear teeth 3 of sprocket wheel 1 are just being attached to the outer round surface of the roller 4 of roller chain.
As shown in Figure 2, the teeth groove of sprocket teeth 3 is divided into two sections working curve section, near tooth top portion 5, is cycloidal curve, and near the above pitch circle of roller seating space circular arc, portion 6 is involute curve.7 tangent in joint near the cycloid of tooth top portion 5 and near the involute of the above pitch circle of roller seating space circular arc 6, the compound curve that formation is smoothly connected.Above-described embodiment is only preferred embodiment of the present utility model; the utility model is not limited to above-mentioned embodiment; as long as working curve section can be divided into multistage, and every section of curve to be adjacent curve be dissimilar curve, within can dropping on the utility model protection domain.
Claims (4)
1. for gear teeth for chain transmission middle sprocket, it is characterized in that described sprocket teeth teeth groove working curve section is divided into two sections or multistage, the compound curve that described sprocket teeth teeth groove working curve section is comprised of involute and cycloid.
2. a kind of gear teeth for chain transmission middle sprocket according to claim 1, described gear teeth teeth groove is cycloidal curve near tooth top portion (5).
3. a kind of gear teeth for chain transmission middle sprocket according to claim 1, near the above pitch circle of described gear teeth teeth groove roller seating space circular arc, (6) are involute curves, near near the involute of (6) cycloid of tooth top portion (5) and pitch circle in joint (7) tangent, formation complex light slip curve.
4. a kind of gear teeth for chain transmission middle sprocket according to claim 3, near the above pitch circle of described gear teeth teeth groove roller seating space circular arc, the involute curve tooth-shape angle of (6) is 24 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420113941.1U CN203796898U (en) | 2014-03-13 | 2014-03-13 | Teeth for sprocket in chain transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420113941.1U CN203796898U (en) | 2014-03-13 | 2014-03-13 | Teeth for sprocket in chain transmission |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203796898U true CN203796898U (en) | 2014-08-27 |
Family
ID=51379110
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420113941.1U Expired - Fee Related CN203796898U (en) | 2014-03-13 | 2014-03-13 | Teeth for sprocket in chain transmission |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203796898U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109669488A (en) * | 2018-12-21 | 2019-04-23 | 中广核达胜加速器技术有限公司 | One kind being used for radiation trolley control method chaindriven greatly and Related product |
-
2014
- 2014-03-13 CN CN201420113941.1U patent/CN203796898U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109669488A (en) * | 2018-12-21 | 2019-04-23 | 中广核达胜加速器技术有限公司 | One kind being used for radiation trolley control method chaindriven greatly and Related product |
| CN109669488B (en) * | 2018-12-21 | 2022-01-28 | 中广核达胜加速器技术有限公司 | Control method for irradiation trolley large chain transmission and related product |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140827 Termination date: 20180313 |