CN202301830U - Strengthening structure of tooth part of arc-tooth bevel gear - Google Patents
Strengthening structure of tooth part of arc-tooth bevel gear Download PDFInfo
- Publication number
- CN202301830U CN202301830U CN2011203386373U CN201120338637U CN202301830U CN 202301830 U CN202301830 U CN 202301830U CN 2011203386373 U CN2011203386373 U CN 2011203386373U CN 201120338637 U CN201120338637 U CN 201120338637U CN 202301830 U CN202301830 U CN 202301830U
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- tooth
- circular arc
- strengthening
- circle
- bevel gear
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Abstract
The utility model discloses a strengthening structure of a tooth part of an arc-tooth bevel gear, which is a circle transition structure formed by leading a circular arc between two adjacent tooth surfaces to be tangential to tooth surfaces at the two sides. A midpoint of a circular arc line is tangential to a tooth root circle; and the radius R of the circular arc is determined by three common tangential points. The position of a tooth root is designed into the circle transition structure, so that the mechanical property is good, the bending strength and the breaking strength of the tooth root can be improved, and the stress concentration degree is remarkably reduced. The strengthening structure has the benefit that not only are the above technical effects generated, but also the strengthening measures can be implemented from another two aspects: firstly, the circle transition structure is adopted at the tooth root to be convenient for the adoption of a precise forging forming process, metal fibers are continuously distributed along the tooth height direction in the forging and pressing processes, and the tooth part is in the shape of a longitudinal metal fiber tissue, so that the slip resistance of the tooth surfaces and the impact resistance of the tooth part are effectively improved; and secondly, as the circle transition structure is adopted at the tooth root, no dead angle exists in the structure to be convenient for carrying out shot blasting strengthening treatment on the tooth part. The strengthening structure is reasonable, is high in strength and is particularly suitable for being matched with a main speed reduction gear in a heavy vehicle drive axle.
Description
Technical field
The utility model relates to a kind of gear structure design, and specifically, the utility model relates to a kind of spiral bevel gear strengthed teeth structure.
Background technique
Spiral bevel gear is that a kind of to have bearing capacity strong, stable drive, and the mechanical transmission part of characteristics such as the engagement noise is little is widely used in the vehicle drive axle and drives the both sides wheel as final gear.Receive the load of factor affecting spiral bevel gears such as road conditions, load-carrying in the vehicle driving process, spiral bevel gear tooth portion receives bigger impact force and moment of torsion under the low-speed heave-load condition especially.In case impact force that takes place and moment of torsion surpass spiral bevel gear tooth portion design flexural strength or shear strength, just possibly cause tooth portion that plastic bending or broken teeth accident take place.The tooth root of the spiral bevel gear of conventional design is a flat-bottom structure, and promptly root circle is connected with the both sides face angle.Realize processing although this linkage structure is simple, easy, the tooth root place that the angle connects is that stress is concentrated maximum region, is prone to induce plastic bending distortion of tooth portion or broken teeth accident.
The model utility content
The utility model is primarily aimed at the problem of existing spiral bevel gear tooth bilge construction strength deficiency; Do not changing material and do not increasing under the prerequisite of manufacture cost; Propose a kind of spiral bevel gear tooth root portion strengthening structure, can significantly improve the working life of spiral bevel gear through the strengthening structure design.
The utility model is realized technical goal through following technical proposals.
Spiral bevel gear strengthed teeth structure, its improvements are: it is by circular arc between adjacent two flank of tooth and the tangent round transition structure that constitutes of two lateral tooth flanks.Said circular arc line mid point and root circle are tangent, and the radius R value of circular arc is confirmed by three common points of tangency.
In the said structure, by the transition circle diameter that forms of circle transition structure more than or equal to the tooth root groove width.
The utility model compared with prior art has following good effect:
1, the tooth root place is designed to the circle transition structure, and mechanical property is good, can promote the counter-bending and anti-rupture strength of tooth root, and significantly reduce stress concentration degree;
2, circle transition structure in tooth root place is convenient to adopt precision forging technology, and steel fiber is along profile of tooth short transverse continuous distributed during forging and pressing, and tooth portion is the longitudinal metal fibrous structure, effectively improves flank of tooth slip property and tooth portion shock resistance;
3, because of tooth root place circle transition structure, do not have the dead angle in the structure, be convenient to that tooth root portion is carried out Shot peening and handle.
Description of drawings
Fig. 1 is that two adjacent teeth structure masters look schematic representation in the utility model.
Fig. 2 forms the schematic perspective view of longitudinal metal fibrous structure through tooth portion behind the precision forging for the utility model.
Embodiment
According to accompanying drawing the utility model is described further below.
Spiral bevel gear strengthed teeth structure shown in Figure 1, it is by circular arc between adjacent two flank of tooth and the tangent round transition structure that constitutes of two lateral tooth flanks.Said circular arc line mid point and root circle are tangent, and the radius R value of circular arc is confirmed by three common points of tangency.Present embodiment is a steyr heavy truck ransaxle spiral bevel gear, its main structure parameters: modulus 10.36mm, the number of teeth 28; 22.5 ° of pressure angles; The wide 4.8mm of teeth groove root, by transition circle diameter of phi=7.2mm that radius R 3.6mm fillet constitutes, this size is greater than tooth root groove width 2.4mm.The utility model is designed to the circle transition structure because of the tooth root place, and mechanical property is good, and present embodiment can promote the counter-bending and anti-rupture strength of tooth root more than 30%, and significantly reduces stress concentration degree.
The utility model is except that producing above-mentioned technique effect; Also can further implement enhancements from other two aspects; The one, tooth root place circle transition structure is convenient to adopt precision forging technology; Steel fiber is along profile of tooth short transverse continuous distributed during forging and pressing, and tooth portion is the longitudinal metal fibrous structure, effectively improves flank of tooth slip property and tooth portion shock resistance.The 2nd, tooth root place circle transition structure does not have the dead angle, is convenient to that tooth portion is done Shot peening and handles.
Claims (2)
1. spiral bevel gear strengthed teeth structure, it is characterized in that: it is by circular arc between adjacent two flank of tooth and the tangent round transition structure that constitutes of two lateral tooth flanks; Said circular arc line mid point and root circle are tangent, and the radius R value of circular arc is confirmed by three common points of tangency.
2. spiral bevel gear strengthed teeth structure according to claim 1 is characterized in that: the transition circle diameter that said round transition structure forms is more than or equal to the tooth root groove width.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203386373U CN202301830U (en) | 2011-09-09 | 2011-09-09 | Strengthening structure of tooth part of arc-tooth bevel gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203386373U CN202301830U (en) | 2011-09-09 | 2011-09-09 | Strengthening structure of tooth part of arc-tooth bevel gear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202301830U true CN202301830U (en) | 2012-07-04 |
Family
ID=46370733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203386373U Expired - Lifetime CN202301830U (en) | 2011-09-09 | 2011-09-09 | Strengthening structure of tooth part of arc-tooth bevel gear |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202301830U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102359569A (en) * | 2011-09-09 | 2012-02-22 | 江苏飞船股份有限公司 | Teeth part strengthening structure of spiral bevel gear |
-
2011
- 2011-09-09 CN CN2011203386373U patent/CN202301830U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102359569A (en) * | 2011-09-09 | 2012-02-22 | 江苏飞船股份有限公司 | Teeth part strengthening structure of spiral bevel gear |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120704 |