CN1248679A - Key dynamic joint - Google Patents
Key dynamic joint Download PDFInfo
- Publication number
- CN1248679A CN1248679A CN 98119345 CN98119345A CN1248679A CN 1248679 A CN1248679 A CN 1248679A CN 98119345 CN98119345 CN 98119345 CN 98119345 A CN98119345 A CN 98119345A CN 1248679 A CN1248679 A CN 1248679A
- Authority
- CN
- China
- Prior art keywords
- key
- main shaft
- hollow shaft
- power
- keyway
- 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.)
- Pending
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- Earth Drilling (AREA)
Abstract
The present invention relates to a sliding connection with key. Said connected main shaft can be gap-combined in a hollow shaft or part with hub, and both are sliding-connected by means of key, and the key or key groove is passed round the main shaft at a helix angle of phi where generally the value of phi is 60-80 deg.. This dynamic connection can convert the circumferential power of driving component into an axial and circumferential force, and its structure is simple.
Description
The present invention relates to a kind of moving connection of key.
Key is slidingly connected at present, because keyway and parallel axes, so circumferential power circumferentially can only be transmitted, can not the power that part is circumferential change into axial power, thereby work as some mainly by circumferential power work, and need axial power and when motion in the work, and (as work such as drilling wells), the moving connection of depending merely on common key just can't realize.
In order to address this problem, common way is to increase corresponding power plant an axial power is provided.Do like this, both increased cost, make complicated in mechanical structure again.
The objective of the invention is to provide being slidingly connected of a kind of key, and it can transmit circumferential power, can make the circumferential power of part be converted into axial power again.
Task of the present invention is achieved in that main shaft is incorporated into (or in band hub part) in the hollow shaft with a gap, be slidingly connected with key and keyway, it is characterized in that keyway (or key) detours on main shaft with lead angle " φ ", hollow shaft (or main shaft) drives main shaft (or hollow shaft) by rotation keyway and key and rotates together.Like this, if hollow shaft is a driving link, the key pressure N that acts on helical spline just produces a circumferential pressure F and axial power F ', F=Sin φ N, F '=Cos φ N, F '=Ctg φ F so.This shows when hollow shaft promotes Workpiece Rotating with power F, pass through F ' and act on axial power of main shaft.The value of φ is in case determine that F ' is directly proportional with F and N.In like manner, if main shaft is driving link, as the same.
The value of lead angle φ is generally 60 °-80 °.
The present invention just changes the key (groove) that parallels to the axis into revolves the screw key that lift angle is φ (groove), thus simple in structure, do not increase cost again, get different φ values simultaneously, can change the size of F ', very convenient.
The present invention is described in further detail below in conjunction with specific embodiment and accompanying drawing thereof.
Fig. 1 is the sectional view of the concrete device of proposition according to the present invention.
With reference to Fig. 1, keyway (1) detours on main shaft (4) with lead angle " φ ", and the value of φ is generally 60 °-80 °.Main shaft (4) is incorporated in the hollow shaft (5) with a gap, and key (2) is incorporated on the inwall of hollow shaft (5), and hollow shaft (5) and main shaft (4) are slidingly connected with key (2) and keyway (1).This device is by belt wheel (3) input power, and the lower end of main shaft (4) can connect instruments (not drawing among the figure) such as drill bit.
When the sense of rotation of hollow shaft (5) and keyway (1) lower end around when consistent, hollow shaft (5) passes to (4) axial force F that make progress of main shaft ', as F ' during greater than the suffered downward power Q of main shaft (5), F ' will promote main shaft and move up.
When the sense of rotation of hollow shaft (5) and keyway (1) lower end around when opposite, hollow shaft (5) can pass to (4) downward axial force F of main shaft ', promote main shaft and move down.
Claims (2)
1, a kind of moving connection of key, main shaft (4) are incorporated in the hollow shaft (5) with a gap, and the two is slidingly connected with key (2) and keyway (1), it is characterized in that keyway (1) (or key) detours on main shaft (4) with lead angle " φ "; Hollow shaft (5) (or main shaft) drives main shaft (4) (or hollow shaft) by helical spline (1) and key (2) and rotates together.
2, according to the moving connection of the described key of claim (1), the value that it is characterized in that the lead angle φ of helical spline (1) and key (2) is 60 °-80 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98119345 CN1248679A (en) | 1998-09-21 | 1998-09-21 | Key dynamic joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98119345 CN1248679A (en) | 1998-09-21 | 1998-09-21 | Key dynamic joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1248679A true CN1248679A (en) | 2000-03-29 |
Family
ID=5226340
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98119345 Pending CN1248679A (en) | 1998-09-21 | 1998-09-21 | Key dynamic joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1248679A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102414457A (en) * | 2009-05-08 | 2012-04-11 | 纳博特斯克株式会社 | Key coupling mechanism |
| CN110567753A (en) * | 2019-09-19 | 2019-12-13 | 四川大学 | Plant rhizosphere trace device of fetching earth |
-
1998
- 1998-09-21 CN CN 98119345 patent/CN1248679A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102414457A (en) * | 2009-05-08 | 2012-04-11 | 纳博特斯克株式会社 | Key coupling mechanism |
| CN110567753A (en) * | 2019-09-19 | 2019-12-13 | 四川大学 | Plant rhizosphere trace device of fetching earth |
| CN110567753B (en) * | 2019-09-19 | 2022-03-11 | 四川大学 | Plant rhizosphere trace device of fetching earth |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |