CN202946642U - Gear with unloading structure - Google Patents
Gear with unloading structure Download PDFInfo
- Publication number
- CN202946642U CN202946642U CN 201220626004 CN201220626004U CN202946642U CN 202946642 U CN202946642 U CN 202946642U CN 201220626004 CN201220626004 CN 201220626004 CN 201220626004 U CN201220626004 U CN 201220626004U CN 202946642 U CN202946642 U CN 202946642U
- Authority
- CN
- China
- Prior art keywords
- gear
- unloading
- gear teeth
- blind hole
- teeth
- 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
Links
Images
Landscapes
- Retarders (AREA)
- Gears, Cams (AREA)
Abstract
The utility model discloses a gear with an unloading structure. Blind holes which have the same diameter and depth and a function of unloading are formed in two end surfaces of each gear tooth of the gear. The center of each blind hole is located in the intersection point of a gear pitch circle and a symmetric axis of each gear tooth. Due to the fact that the blind holes are formed in the end portions of the gear teeth, contact stiffness of the end portions of the gear teeth can be reduced, uneven distribution of load in a tooth direction can be effectively improved, stress concentration phenomenon of the end portions of the gear teeth is eliminated, and therefore service life of the gear is prolonged. The gear with the unloading structure can well improve bearing capacity of the gear teeth, the unloading blind holes can be manufactured without sunperfinish machining, and actionability is strong.
Description
Technical field
The utility model relates to a kind of gear, especially relates to a kind of gear with unloading-structure.
Background technique
During a pair of desirable parallel-axes gears work, should be that the contact of limit for length's line is arranged in facewidth direction.But the error when making due to gear transmission, the distortion during work and temperature rise all can affect the teeth directional even contact, thereby the contact of the uniform line that can not realize ideal.Wheel tooth is inhomogeneous to the engagement contact, causes gear teeth unbalance loading.Contact stress appears in gear teeth end to be concentrated, and damages and break of gear tooth thereby the early stage flank of tooth occurs.And a pair of gear is when normally meshing, and Maximum Contact stress occurs in the end of the engagement gear teeth, and is positioned near gear teeth nodel line.Therefore, solve near the end stress concentration problem of gear teeth nodel line, extend service life of gear extremely urgent.
Based on above-mentioned background, if can reduce the contact stiffness of gear teeth end, just can eliminate gear teeth end stress concentration phenomenon, thereby improve the working life of gear.
Summary of the invention
The purpose of this utility model is to provide a kind of gear with unloading-structure.Process the blind hole structure of Unloading Effect in gear teeth ends, can reduce the contact stiffness of gear teeth end, effectively improve teeth directional load skewness, eliminate gear teeth end stress concentration phenomenon, thus the working life of improving gear.
The technical solution adopted in the utility model is:
Be equipped with identical with the degree of depth and the blind hole that have Unloading Effect of diameter in each gear teeth both ends of the surface of gear.
The center of circle of described blind hole is positioned at the intersection point of pitch circle and gear teeth symmetry axis.
The diameter of described blind hole
, the degree of depth of blind hole
Wherein
Be the transverse module of gear,
bBe the facewidth.
The beneficial effect that the utlity model has is:
1, process the blind hole structure of Unloading Effect in gear teeth ends, can reduce the contact stiffness of gear teeth end, can effectively improve teeth directional load skewness, eliminate gear teeth end stress concentration phenomenon, thus the working life of improving gear.
2, described gear with unloading-structure can improve gear capacity well, and the off-load blind hole need not superfinish on making, and exploitativeness is strong.
Description of drawings
Fig. 1 does not have the gear teeth of unloading-structure at the distribution of contact figure of facewidth direction.
Fig. 2 is the gear schematic diagram with the blind hole unloading-structure.
Fig. 3 is A in Fig. 1-A broken section enlarged diagram.
Embodiment
Below in conjunction with drawings and Examples, the utility model is further described.
As shown in Figure 1, be there is no the gear teeth of unloading-structure at the distribution of contact figure of facewidth direction.There is contact stress to concentrate at gear teeth two ends, causes that the too early contact fatigue of the flank of tooth lost efficacy.
As shown in Figure 2 and Figure 3, the utility model is equipped with identical with the degree of depth and the blind hole that have Unloading Effect of diameter in each gear teeth both ends of the surface of gear.It can reduce the contact stiffness of the gear teeth end blind hole unloading-structure, can effectively improve teeth directional load skewness, eliminates gear teeth end stress concentration phenomenon, thus the working life of improving gear.
The center of circle of described blind hole is positioned at the intersection point of pitch circle and gear teeth symmetry axis.When being meshed due to a pair of gear, Maximum Contact stress occurs on the gear teeth of normal engagement, is positioned near gear teeth nodel line.So being positioned on pitch circle, unloading-structure can reduce to greatest extent Maximum Contact stress.
The diameter of described blind hole
, the degree of depth of blind hole
Wherein
Be the transverse module of gear,
bBe the facewidth.
Above-mentioned embodiment is used for the utility model of explaining; rather than the utility model is limited; in the protection domain of spirit of the present utility model and claim, any modification and change to the utility model is made all fall into protection domain of the present utility model.
Claims (3)
1. gear with unloading-structure is characterized in that: be equipped with identical with the degree of depth and the blind hole that have Unloading Effect of diameter in each gear teeth both ends of the surface of gear.
2. a kind of gear with unloading-structure according to claim 1, it is characterized in that: the center of circle of described blind hole is positioned at the intersection point of pitch circle and gear teeth symmetry axis.
3. a kind of gear with unloading-structure according to claim 1, is characterized in that: the diameter of described blind hole
, the degree of depth of blind hole
Wherein
Be the transverse module of gear,
bBe the facewidth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220626004 CN202946642U (en) | 2012-11-23 | 2012-11-23 | Gear with unloading structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220626004 CN202946642U (en) | 2012-11-23 | 2012-11-23 | Gear with unloading structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202946642U true CN202946642U (en) | 2013-05-22 |
Family
ID=48422346
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220626004 Expired - Fee Related CN202946642U (en) | 2012-11-23 | 2012-11-23 | Gear with unloading structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202946642U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102927242A (en) * | 2012-11-23 | 2013-02-13 | 浙江大学 | Gear with unloading structures |
-
2012
- 2012-11-23 CN CN 201220626004 patent/CN202946642U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102927242A (en) * | 2012-11-23 | 2013-02-13 | 浙江大学 | Gear with unloading structures |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202946642U (en) | Gear with unloading structure | |
| CN102927242A (en) | Gear with unloading structures | |
| CN105114598A (en) | Relieving structure for bending stress of tooth roots of straight bevel gear | |
| CN204893104U (en) | Asymmetric hobbing cutter | |
| CN103591251A (en) | Cast gear | |
| CN202883948U (en) | Helical gear with changeable helical angle | |
| CN106321760A (en) | Circular-arc-tooth-trace gear and rack transmission | |
| CN209621998U (en) | A kind of single-circular-arc gear structure | |
| CN205064762U (en) | Straight bevel gear tooth root bending resistance structure | |
| CN103761396A (en) | Tooth direction line-type quantification designing method for cylindrical gear based on variable misalignment quantities | |
| CN102913608A (en) | Bevel gears with variable helical angles | |
| CN204186963U (en) | Auxiliary transmission gear shaft | |
| WO2009138226A3 (en) | Differential comprising double differential gears | |
| CN204267660U (en) | duplex driven gear | |
| CN203363010U (en) | Transmission structure of fine-module and multi-teeth planetary gears | |
| CN101725692A (en) | Compound gear | |
| CN204099543U (en) | Based on the circular-arc bevel gear of dissimilar tooth form angle and transverse tooth thickness corner-kick face profile of tooth | |
| CN202251808U (en) | Parallel planet wheel of parallel gear and planet speed reducer | |
| CN103615514A (en) | Automobile transmission gear | |
| CN103256373A (en) | Gear with good anti-vibration performance | |
| CN205748166U (en) | A kind of planet wheel spindle and bearing pin position degree Rapid checking device | |
| CN205089909U (en) | Transfer case gear pair of transaxle | |
| CN206280465U (en) | A kind of agricultural machinery countershaft | |
| CN204458877U (en) | torque transmitting assembly | |
| CN102252081A (en) | Parallel gears |
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 |
Granted publication date: 20130522 Termination date: 20141123 |
|
| EXPY | Termination of patent right or utility model |