CN102927242A - Gear with unloading structures - Google Patents
Gear with unloading structures Download PDFInfo
- Publication number
- CN102927242A CN102927242A CN2012104812822A CN201210481282A CN102927242A CN 102927242 A CN102927242 A CN 102927242A CN 2012104812822 A CN2012104812822 A CN 2012104812822A CN 201210481282 A CN201210481282 A CN 201210481282A CN 102927242 A CN102927242 A CN 102927242A
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- China
- Prior art keywords
- gear
- unloading
- blind hole
- gear teeth
- tooth
- 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.)
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- Retarders (AREA)
Abstract
The invention discloses a gear with unloading structures. Unloading blind holes with identical diameter and depth are arranged in the two end surfaces of each gear tooth of the gear; and the circle center of each blind hole is positioned at a point of intersection of a pitch circle of the gear and a symmetry axis of each gear tooth. The unloading blind hole structures machined at the end parts of the gear teeth reduce the contact stiffness of the end parts of the gear teeth, effectively improve the uneven distribution of tooth directional load, and eliminate the stress concentration of the end parts of the gear teeth, thereby prolonging the service life of the gear; and the gear with the unloading structures satisfactorily improves the carrying capacity of the gear, and is highly applicable as the unloading blind holes require no superfinishing in manufacture.
Description
Technical field
The present invention relates to a kind of gear, especially relate 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 owing 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 the gear teeth nodel line.Therefore, solve near the end stress concentration problem of gear teeth nodel line, it is extremely urgent to prolong service life of gear.
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 object of the present invention is to provide a kind of gear with unloading-structure.Process the blind hole structure of Unloading Effect in gear teeth end, 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 used in the present invention is:
Each gear teeth both ends of the surface at gear are equipped with diameter blind hole identical with the degree of depth and that have Unloading Effect.
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 present invention has is:
1, process the blind hole structure of Unloading Effect in gear teeth end, 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 in manufacturing, 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 representation with the blind hole unloading-structure.
Fig. 3 is A among Fig. 1-A broken section enlarged diagram.
Embodiment
The present invention is further illustrated below in conjunction with drawings and Examples.
As shown in Figure 1, be not have 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.
Such as Fig. 2, shown in Figure 3, the present invention is equipped with diameter blind hole identical with the degree of depth and that have Unloading Effect 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.Because when a pair of gear was meshed, Maximum Contact stress occurred on the gear teeth of normal engagement, is positioned near the gear teeth nodel line.So being positioned on the 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 present invention that explains, rather than limits the invention, and in the protection domain of spirit of the present invention and claim, any modification and change to the present invention makes all fall into protection scope of the present invention.
Claims (3)
1. gear with unloading-structure, it is characterized in that: each gear teeth both ends of the surface at gear are equipped with diameter blind hole identical with the degree of depth and that have Unloading Effect.
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 |
|---|---|---|---|
| CN2012104812822A CN102927242A (en) | 2012-11-23 | 2012-11-23 | Gear with unloading structures |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104812822A CN102927242A (en) | 2012-11-23 | 2012-11-23 | Gear with unloading structures |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102927242A true CN102927242A (en) | 2013-02-13 |
Family
ID=47642121
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012104812822A Pending CN102927242A (en) | 2012-11-23 | 2012-11-23 | Gear with unloading structures |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102927242A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105114598A (en) * | 2015-09-25 | 2015-12-02 | 江苏太平洋齿轮传动有限公司 | Relieving structure for bending stress of tooth roots of straight bevel gear |
| CN106499798A (en) * | 2016-11-25 | 2017-03-15 | 陕西法士特齿轮有限责任公司 | A kind of top bottom diplopore gear and its method for designing for vibration and noise reducing |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2050911U (en) * | 1989-01-10 | 1990-01-10 | 太原工业大学 | Involute gear with apertures |
| JP2006308107A (en) * | 2006-07-19 | 2006-11-09 | Enplas Corp | Injection-molded plastic gear |
| JP2008115886A (en) * | 2006-10-31 | 2008-05-22 | Kyocera Mita Corp | Helical gear |
| DE102009027138A1 (en) * | 2009-06-24 | 2010-12-30 | Robert Bosch Gmbh | Gearbox has gear wheel, which comprises multiple teeth, where each tooth of gear wheel has hollow area, and hollow area in each tooth is closed hollow chamber or pass throughable hollow recess |
| CN102459959A (en) * | 2009-05-20 | 2012-05-16 | 米巴烧结奥地利有限公司 | Gear wheel |
| CN202946642U (en) * | 2012-11-23 | 2013-05-22 | 浙江大学 | Gear with unloading structure |
-
2012
- 2012-11-23 CN CN2012104812822A patent/CN102927242A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2050911U (en) * | 1989-01-10 | 1990-01-10 | 太原工业大学 | Involute gear with apertures |
| JP2006308107A (en) * | 2006-07-19 | 2006-11-09 | Enplas Corp | Injection-molded plastic gear |
| JP2008115886A (en) * | 2006-10-31 | 2008-05-22 | Kyocera Mita Corp | Helical gear |
| CN102459959A (en) * | 2009-05-20 | 2012-05-16 | 米巴烧结奥地利有限公司 | Gear wheel |
| DE102009027138A1 (en) * | 2009-06-24 | 2010-12-30 | Robert Bosch Gmbh | Gearbox has gear wheel, which comprises multiple teeth, where each tooth of gear wheel has hollow area, and hollow area in each tooth is closed hollow chamber or pass throughable hollow recess |
| CN202946642U (en) * | 2012-11-23 | 2013-05-22 | 浙江大学 | Gear with unloading structure |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105114598A (en) * | 2015-09-25 | 2015-12-02 | 江苏太平洋齿轮传动有限公司 | Relieving structure for bending stress of tooth roots of straight bevel gear |
| CN106499798A (en) * | 2016-11-25 | 2017-03-15 | 陕西法士特齿轮有限责任公司 | A kind of top bottom diplopore gear and its method for designing for vibration and noise reducing |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20130213 |