CN202545541U - Inner spline shaft - Google Patents
Inner spline shaft Download PDFInfo
- Publication number
- CN202545541U CN202545541U CN2012201645310U CN201220164531U CN202545541U CN 202545541 U CN202545541 U CN 202545541U CN 2012201645310 U CN2012201645310 U CN 2012201645310U CN 201220164531 U CN201220164531 U CN 201220164531U CN 202545541 U CN202545541 U CN 202545541U
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- CN
- China
- Prior art keywords
- head
- splined shaft
- guide pillar
- female splined
- spline
- 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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- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
The utility model discloses an inner spline shaft, which comprises a head part and a tail part, wherein the head part is in welding connection with the tail part through friction. The head part comprises a cylindrical part and a guide pillar part, the outer diameter of the guide pillar part is larger than that of the cylindrical part, a spline tooth is arranged inside an inner cavity of the cylindrical part, and the guide pillar part is provided with an inner cavity. The tail part comprises a connecting part, a rod part and a pin part, which are sequentially connected with one another, the diameter of the connecting part is larger than that of the rod part, the diameter of the rod part is larger than that of the pin part, the end of the connecting part, which is close to the head part is provided with an inner cavity, and the end of the pin part is provided with a central hole. The inner spline shaft directly adopts two sections to be in friction welding connection with each other, so that the process is simpler, the precision is higher, and the service life is longer.
Description
Technical field
The utility model relates to a kind of transmission shaft, and particularly relating to a kind of in the transmission shaft is female splined shaft.
Background technique
Female splined shaft is as one type in the transmission shaft; Because its driving force is big; Moment of torsion is evenly distributed, and in industrial field, is widely used, especially is applied to the transmission shaft on the actuating motor; Internal spline has become the first-selected kind of drive, but female splined shaft technical issues that need to address in course of working are a lot.Existing female splined shaft such as Fig. 1 and Fig. 2, the female splined shaft among Fig. 1 are whole processing.Female splined shaft among Fig. 2 then comprises head 1 ' and afterbody 2 ', and middle taper pin 3 ' is connected with afterbody 2 ' head 1 ' through adding glue movingly, and head has spline tooth in the 1 ' chamber.
The processing of female splined shaft should be noted that three key performances: the spline precision; The concentricity and the tooth portion hardness of spline and bearing retaining.The spline precision drive gap of external splines in the decision, excesssive gap can produce noise; The gap is too small, can produce interference, and the spline precision is to guarantee the rational key factor of drive gap.The concentricity of spline and bearing retaining has then determined the stationarity in the transmission process, if concentricity is overproof, is prone to cause vibrations, and the wearing and tearing of the aggravation flank of tooth.The wear resistance of tooth portion hardness decision spline, tooth portion hardness is not enough, is prone to cause wearing and tearing, reduces the working life of axle; Tooth portion hardness is too high to be prone to crack or phenomenon of rupture.For this reason, reasonably hardness is to guarantee the key factor in splined shaft life-span.
And there are problems such as lathe, cutter, frock, measurement, manufacturing efficiency, cost, heat treatment in traditional female splined shaft:
There are two problems in the female splined shaft of integrity among Fig. 1:
1, makes in blind hole owing to spline, so the processing of spline can only adopt the method for gear shaping to accomplish: after promptly monodentate machines,, process next tooth, process all teeth successively through the rotation of indexing mechanism.Spline after the processing can receive the precision of slotting machine, indexing mechanism precision and the influence of frock clamping precision, and the spline precision can't reach requirement.The concentricity of spline and bearing retaining can only be controlled in 0.04, and efficient is low, and cost is high.
2, in order to improve the wear resistance of spline, tratitional technology is with after the whole gold machining of 40Cr, flank of tooth high frequency hardening, the whole through hardening of the flank of tooth.Simultaneously spline cracks or splits off phenomenon in the transmission, can only be Hardness Control about HRC40.And consider that from the wear resistance angle this hardness obviously is not enough.
3, owing to there are the problems referred to above; A kind of improvement to whole female splined shaft is the mosaic structure that adopts Fig. 2: after head 1 ' and afterbody 2 ' and 3 ' the whole fine finishing of middle taper pin, employing adds glue movingly and taper pin 3 ' links up head 1 ' and afterbody 2 '.Do like this, spline can be processed with broaching machine, has improved the manufacturing efficiency of spline processing, improves the spline precision, aspect heat treatment, can take the surface to ooze the contradiction that means such as charcoal or nitrogenize solve splined surfaces hardness and core intensity.But mosaic structure can produce other problem equally, such as quality of fit, linking intensity or the like, and in order to satisfy the integral rigidity and the intensity of axle, must do more axle, so mosaic structure can be run into problems equally.
The model utility content
In order to overcome existing short shortcoming of female splined shaft life-span, the utility model provides a kind of new female splined shaft, and precision is high, the life-span is long.
The technological scheme of the utility model is: a kind of female splined shaft comprises head and afterbody, and head is connected through friction welding with afterbody.
Said head comprises column position and guide pillar position, and the outer diameter at guide pillar position is greater than the column position, and the inner chamber at column position has spline tooth, and the guide pillar position has inner chamber.
Said afterbody comprises joint, bar portion and the pin portion that connects successively, and the diameter of joint is greater than bar portion, and the diameter of bar portion is greater than pin portion, and joint something or somebody to fall back on portion one end has inner chamber, and pin portion end has center hole.
The female splined shaft of the utility model directly adopts two sections friction weldings of head and afterbody to be connected, and has guaranteed female splined shaft spline precision, and technology is simple, long service life.
Description of drawings
Fig. 1 is the structural representation of a kind of female splined shaft of existing technology.
Fig. 2 is the structural representation of the another kind of female splined shaft of existing technology.
Fig. 3 is the structural representation of the female splined shaft of the utility model.
Fig. 4 is the structural representation of the utility model female splined shaft head.
Fig. 5 is the structural representation of the utility model female splined shaft afterbody.
Embodiment
Specify the female splined shaft of the utility model below in conjunction with accompanying drawing.
The female splined shaft of the utility model is as shown in Figure 3, comprises head 1 and afterbody 2, and head 1 and afterbody 2 connect as one through friction welding.As shown in Figure 4, head 1 comprises column position 11 and guide pillar position 12, and the outer diameter at guide pillar position 12 is greater than column position 11, and the inner chamber at column position 11 has spline tooth 13, and guide pillar position 12 also has inner chamber 121.As shown in Figure 5, afterbody 2 comprises joint 21, bar portion 22 and the pin portion 23 that connects successively, and the diameter of joint 21 is greater than bar portion 22, and the diameter of bar portion 22 is greater than pin portion 23, and joint 21 something or somebody to fall back on portions 1 one ends have inner chamber 211, and pin portion 23 ends have center hole.Can see that from Fig. 5 pin portion 23 also can be made up of two-part that diameter dwindles successively.
Although disclose the specific embodiment and the accompanying drawing of the utility model for the purpose of illustration; Its purpose is to help to understand the content of the utility model and implement according to this; But it will be appreciated by those skilled in the art that: in the spirit and scope that do not break away from the utility model and appended claim, various replacements, variation and modification all are possible.Therefore, the utility model should not be limited to most preferred embodiment and the disclosed content of accompanying drawing, and the utility model requires the scope of protection to be as the criterion with the scope that claims define.
Claims (3)
1. a female splined shaft is characterized in that, comprises head and afterbody, and head is connected through friction welding with afterbody.
2. female splined shaft according to claim 1 is characterized in that, said head comprises column position and guide pillar position, and the outer diameter at guide pillar position is greater than the column position, and the inner chamber at column position has spline tooth, and the guide pillar position has inner chamber.
3. female splined shaft according to claim 1 is characterized in that, said afterbody comprises joint, bar portion and the pin portion that connects successively; The diameter of joint is greater than bar portion; The diameter of bar portion is greater than pin portion, and joint something or somebody to fall back on portion one end has inner chamber, and pin portion end has center hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201645310U CN202545541U (en) | 2012-04-18 | 2012-04-18 | Inner spline shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201645310U CN202545541U (en) | 2012-04-18 | 2012-04-18 | Inner spline shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202545541U true CN202545541U (en) | 2012-11-21 |
Family
ID=47166182
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201645310U Expired - Fee Related CN202545541U (en) | 2012-04-18 | 2012-04-18 | Inner spline shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202545541U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102635624A (en) * | 2012-04-18 | 2012-08-15 | 宁波捷成轴业有限公司 | Internal spline shaft and preparation method thereof |
-
2012
- 2012-04-18 CN CN2012201645310U patent/CN202545541U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102635624A (en) * | 2012-04-18 | 2012-08-15 | 宁波捷成轴业有限公司 | Internal spline shaft and preparation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121121 Termination date: 20130418 |