CN112112945A - Gear with composite texture - Google Patents

Gear with composite texture Download PDF

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Publication number
CN112112945A
CN112112945A CN202010950876.8A CN202010950876A CN112112945A CN 112112945 A CN112112945 A CN 112112945A CN 202010950876 A CN202010950876 A CN 202010950876A CN 112112945 A CN112112945 A CN 112112945A
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CN
China
Prior art keywords
gear
composite
annular groove
composite texture
circular
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
Application number
CN202010950876.8A
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Chinese (zh)
Inventor
万珍平
赵航
曾繁铿
张辰光
姚彩英
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhuhai Junxing Electromechanical Co ltd
South China University of Technology SCUT
Original Assignee
Zhuhai Junxing Electromechanical Co ltd
South China University of Technology SCUT
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Zhuhai Junxing Electromechanical Co ltd, South China University of Technology SCUT filed Critical Zhuhai Junxing Electromechanical Co ltd
Priority to CN202010950876.8A priority Critical patent/CN112112945A/en
Publication of CN112112945A publication Critical patent/CN112112945A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/02—Toothed members; Worms
    • F16H55/17—Toothed wheels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/042—Guidance of lubricant
    • F16H57/043—Guidance of lubricant within rotary parts, e.g. axial channels or radial openings in shafts
    • F16H57/0431—Means for guiding lubricant directly onto a tooth surface or to foot areas of a gear, e.g. by holes or grooves in a tooth flank

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gears, Cams (AREA)

Abstract

The invention relates to a gear with a composite texture, which comprises a plurality of gear teeth, wherein the tooth surface of each gear tooth is provided with a plurality of composite textures, each composite texture is provided with a circular pit, spherical protrusions are arranged in the circular pits, and an annular groove is formed between each spherical protrusion and each circular pit. The annular groove can store gear lubricating oil, and when the gear is meshed, the lubricating oil can fully flow in the annular groove, so that a stable oil film with uniform thickness is formed on the tooth surface, the lubricating area of the lubricating oil is increased, and the secondary dynamic pressure lubricating effect is increased. The annular groove can also contain abrasive particles, and when the gear teeth are not meshed, the abrasive particles contained in the annular groove can be thrown out along with the rotation of the gear, cannot be deposited at the tooth root to threaten the gear teeth, and the abrasion of the abrasive particles to the tooth surfaces of the gear teeth is reduced. The annular groove design of the composite texture effectively reduces the tooth surface meshing friction coefficient, so that the gear has better antifriction performance, the bearing capacity of the gear is improved, and the service life of the gear is effectively prolonged.

Description

Gear with composite texture
Technical Field
The invention relates to the technical field of mechanical gears, in particular to a gear with a composite texture.
Background
The gear is one of the most common transmission parts in life, and is widely applied to the fields of aerospace, transportation, mechanical manufacturing and the like. Gears, which are important components of mechanical transmission systems, are subjected to periodic impact force, bending stress, contact stress, etc. during transmission, so that various failure modes such as: gear tooth breakage, tooth flank wear, pitting, gluing, plastic deformation, and the like. Particularly in high-speed transmission, the abrasion of the tooth surface of the gear is more obvious, and the service life of the gear is shortened sharply. Therefore, how to reduce the abrasion of the tooth surface when the gear is meshed and prolong the service life of the gear is a problem which is urgently needed to be solved at present.
In the last decade, surface texture has become a research hotspot in the field of interface science at home and abroad as a method capable of remarkably improving the interface performance. At present, researches show that the surface texture technology plays a positive role in improving the surface friction and wear performance, and how to design the surface texture on the tooth surface of the gear is the key for solving the problems of improving the wear resistance and prolonging the service life of the gear.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention aims to: the gear with the composite texture can improve the fluidity and the lubricating area of gear lubricating oil, increase the secondary dynamic pressure lubricating effect, reduce the abrasion of abrasive particles to the tooth surface of the gear, reduce the meshing friction coefficient of the tooth surface, ensure that the gear has better antifriction performance, improve the bearing capacity of the gear and effectively prolong the service life of the gear.
In order to achieve the purpose, the invention adopts the following technical scheme:
a gear with a composite texture comprises a plurality of gear teeth, wherein the tooth surface of each gear tooth is provided with a plurality of composite textures, each composite texture is provided with a circular concave pit, spherical protrusions are arranged in the circular concave pits, and an annular groove is formed between each spherical protrusion and each circular concave pit.
Further, the cross section of the circular pit is gradually increased from bottom to top.
Further, the cross section of the circular concave pit is isosceles trapezoid.
Further, the length of the upper base of the isosceles trapezoid is da100-160 μm, and a lower bottom length dc150 to 200 μm, and a height hc＝10～30μm。
Further, the height of the spherical protrusion is smaller than the depth of the circular recess.
Further, the height of the spherical protrusion is hs＝10～20μm。
Furthermore, the distance between the middle part of the circular concave pit and the middle part of the spherical protrusion is es＝0～10μm。
Furthermore, the multiple composite textures are arranged in a multi-row array, the multiple composite textures in each row are sequentially arranged at equal intervals, and the adjacent two rows of composite textures are arranged in a staggered mode.
Further, the distance between each two adjacent composite textures is equal.
Furthermore, the distance a between every two adjacent composite textures is 0.8-2 mm.
In summary, the present invention has the following advantages:
the annular groove formed between the spherical protrusion and the circular pit can store gear lubricating oil, and when the gear is meshed, the lubricating oil can fully flow in the annular groove, so that a stable oil film with uniform thickness is formed on the tooth surface, the lubricating area of the lubricating oil is improved, and the secondary dynamic pressure lubricating effect is improved. The annular groove can also contain abrasive particles, when the gear teeth are not meshed, the abrasive particles contained in the annular groove can be thrown out along with the rotation of the gear, the abrasive particles cannot be deposited at the tooth root to threaten the gear teeth, the abrasion of the abrasive particles to the tooth surfaces of the gear teeth is reduced, and the safety of the gear is improved. The annular groove design of the composite texture effectively reduces the tooth surface meshing friction coefficient, so that the gear has better antifriction performance, the bearing capacity of the gear is improved, and the service life of the gear is effectively prolonged.
Drawings
Fig. 1 is a schematic perspective view of an embodiment of the present invention.
Fig. 2 is a schematic view of a composite texture arrangement according to an embodiment of the present invention.
Fig. 3 is a sectional view a-a of fig. 2.
Fig. 4 is an enlarged view at I of fig. 2.
Description of reference numerals:
1-gear, 2-composite texture, 3-circular pit, 4-spherical protrusion, and 5-annular groove.
Detailed Description
The present invention will be described in further detail below.
As shown in fig. 1 to 4, a gear with a composite texture comprises a plurality of gear teeth, a plurality of composite textures 2 are arranged on the tooth surface of the gear teeth, the composite textures 2 are provided with circular pits 3, spherical protrusions 4 are arranged in the circular pits 3, and annular grooves 5 are formed between the spherical protrusions 4 and the circular pits 3.
The annular groove 5 formed between the spherical protrusion 4 and the circular pit 3 can store gear lubricating oil, and when the gear 1 is meshed, the lubricating oil can fully flow in the annular groove 5, so that a stable oil film with uniform thickness is formed on a tooth surface, the lubricating area of the lubricating oil is improved, and the secondary dynamic pressure lubricating effect is increased. The annular groove 5 can also contain abrasive particles, when the gear teeth are not meshed, the abrasive particles contained in the annular groove 5 can be thrown out along with the rotation of the gear 1, the abrasive particles cannot be deposited at the tooth root to threaten the gear teeth, the abrasion of the abrasive particles to the tooth surfaces of the gear teeth is reduced, and the safety of the gear 1 is improved. The design of the annular groove 5 of the composite texture 2 effectively reduces the tooth surface meshing friction coefficient, so that the gear 1 obtains better antifriction performance, the bearing capacity of the gear 1 is improved, and the service life of the gear 1 is effectively prolonged.
The cross section of the circular pit 3 is gradually increased from bottom to top.
Because the round pits 3 are narrow at the lower part and wide at the upper part, when the gear 1 is meshed, lubricating oil can more easily flow out of the annular groove 5 and fully lubricate the tooth surface, and the lubricating effect is improved. When the teeth are not engaged, the abrasive particles contained in the annular groove 5 are more easily thrown out with the rotation of the gear 1, improving the safety of the gear 1.
The cross section of the circular concave pit 3 is isosceles trapezoid.
The circular pits 3 are in a central symmetrical structure with the center of the circular pits 3 as a central point. The circular pits 3 exhibit a funnel shape. The inner side wall of the circular concave pit 3 is a circular truncated cone-shaped inclined plane, the structure is balanced, lubricating oil has higher fluidity in the annular groove 5, the lubricating effect is better, and abrasive particles are more easily thrown away along with the rotation of the gear 1.
The length of the upper base of the isosceles trapezoid is da100-160 μm, and a lower bottom length dc150 to 200 μm, and a height hc10 to 30 μm. Preferably, da＝160μm，dc＝200μm，hc＝20μm。
The height of the spherical protrusions 4 is smaller than the depth of the circular depressions 3.
When the gear 1 is meshed, the lower spherical protrusions 4 enable the meshed gear teeth to be more easily contacted with lubricating oil in the annular groove 5, and the lubricating effect is better.
The height of the spherical protrusion 4 is hs10 to 20 μm. Preferably, hs＝15μm。
The distance between the middle part of the circular concave pit 3 and the middle part of the spherical bulge 4 is es0 to 10 μm. Preferably, esThe spherical protrusion 4 is located at the right center of the circular concave pit 3, the structure is most balanced, and the lubricating oil has the best flowability in the annular groove 5.
The multiple composite textures 2 are arranged in a multi-row array, the multiple composite textures 2 in each row are sequentially arranged at equal intervals, and the two adjacent rows of composite textures 2 are arranged in a staggered mode.
Through the multi-row composite texture 2 array arrangement and equidistant staggered arrangement, the tooth surface temperature of a meshing area can be effectively reduced, the gear tooth deformation of the gear 1 is reduced, and the service life of the gear 1 is prolonged.
The distance between every two adjacent composite textures 2 is equal.
Each composite texture 2 positioned at the non-array edge is adjacently provided with 6 composite textures 2 at the periphery, namely, the upper composite texture 2, the left composite texture 2, the right composite texture 2 and the lower composite texture 2, and the 6 composite textures 2 are respectively positioned at the vertex position of a regular hexagon, so that the structure is very balanced, the space arrangement among the 6 composite textures 2 is more reasonable, the heat dissipation effect is better, the tooth surface temperature of a meshing area can be more effectively reduced, and the tooth deformation of the gear 1 is reduced.
The distance a between every two adjacent composite textures 2 is 0.8-2 mm. Preferably, a is 1 mm.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.

Claims (10)

1. A gear having a composite texture comprising a plurality of gear teeth, wherein: the tooth surface of the gear tooth is provided with a plurality of composite textures, each composite texture is provided with a circular pit, spherical protrusions are arranged in the circular pits, and an annular groove is formed between each spherical protrusion and each circular pit.
2. A gear having composite texture according to claim 1, wherein: the cross section of the circular pit is gradually increased from bottom to top.
3. A gear having composite texture according to claim 2, wherein: the cross section of the circular concave pit is isosceles trapezoid.
4. A gear having composite texture according to claim 3, wherein: the length of the upper base of the isosceles trapezoid is da100-160 μm, and a lower bottom length dc150 to 200 μm, and a height hc＝10～30μm。
5. A gear having composite texture according to claim 1, wherein: the height of the spherical protrusion is smaller than the depth of the circular pit.
6. A gear having composite texture according to claim 5, wherein: the height of the spherical protrusion is hs＝10～20μm。
7. A gear having composite texture according to claim 1, wherein: the distance between the middle part of the circular concave pit and the middle part of the spherical bulge is es＝0～10μm。
8. A gear having composite texture according to claim 1, wherein: the composite textures are arranged in a multi-row array, the composite textures in each row are sequentially arranged at equal intervals, and the adjacent two rows of composite textures are arranged in a staggered mode.
9. A gear having composite texture according to claim 8, wherein: the distance between every two adjacent composite textures is equal.
10. A gear having composite texture according to claim 9, wherein: the distance between every two adjacent composite textures is 0.8-2 mm.
CN202010950876.8A 2020-09-11 2020-09-11 Gear with composite texture Pending CN112112945A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010950876.8A CN112112945A (en) 2020-09-11 2020-09-11 Gear with composite texture

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010950876.8A CN112112945A (en) 2020-09-11 2020-09-11 Gear with composite texture

Publications (1)

Publication Number Publication Date
CN112112945A true CN112112945A (en) 2020-12-22

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112879528A (en) * 2021-01-25 2021-06-01 安徽工业大学 Self-lubricating gear and sealing assembly with oil supply and return functions
CN114151532A (en) * 2021-11-16 2022-03-08 西安石油大学 Coupling bionic driving wheel capable of improving traction force of wheel type tractor
CN114352700A (en) * 2021-12-29 2022-04-15 江苏大学 Heavy-duty gear capable of improving bearing capacity of lubricating oil film
US20220299097A1 (en) * 2019-08-30 2022-09-22 Sumitomo Electric Industries, Ltd. Sintered gear
CN117367791A (en) * 2023-12-08 2024-01-09 珠海市钧兴机电有限公司 Gear testing assembly and testing device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004345022A (en) * 2003-05-22 2004-12-09 Fuji Heavy Ind Ltd Gear and its manufacturing method
JP2009156368A (en) * 2007-12-27 2009-07-16 Aisin Aw Co Ltd Gear rotation transmission device
CN102889362A (en) * 2012-10-31 2013-01-23 浙江大学 Gear with surface texture tooth surfaces
CN108253114A (en) * 2017-12-21 2018-07-06 安徽工程大学 A kind of Self-lubricating gear with micro- texture
CN108361350A (en) * 2018-02-12 2018-08-03 合肥工业大学 A kind of oil storage type Self-lubricating gear

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004345022A (en) * 2003-05-22 2004-12-09 Fuji Heavy Ind Ltd Gear and its manufacturing method
JP2009156368A (en) * 2007-12-27 2009-07-16 Aisin Aw Co Ltd Gear rotation transmission device
CN102889362A (en) * 2012-10-31 2013-01-23 浙江大学 Gear with surface texture tooth surfaces
CN108253114A (en) * 2017-12-21 2018-07-06 安徽工程大学 A kind of Self-lubricating gear with micro- texture
CN108361350A (en) * 2018-02-12 2018-08-03 合肥工业大学 A kind of oil storage type Self-lubricating gear

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220299097A1 (en) * 2019-08-30 2022-09-22 Sumitomo Electric Industries, Ltd. Sintered gear
US11745261B2 (en) * 2019-08-30 2023-09-05 Sumitomo Electric Industries, Ltd. Sintered gear
CN112879528A (en) * 2021-01-25 2021-06-01 安徽工业大学 Self-lubricating gear and sealing assembly with oil supply and return functions
CN114151532A (en) * 2021-11-16 2022-03-08 西安石油大学 Coupling bionic driving wheel capable of improving traction force of wheel type tractor
CN114352700A (en) * 2021-12-29 2022-04-15 江苏大学 Heavy-duty gear capable of improving bearing capacity of lubricating oil film
CN114352700B (en) * 2021-12-29 2024-04-09 江苏大学 Heavy-duty gear capable of improving bearing capacity of lubricating oil film
CN117367791A (en) * 2023-12-08 2024-01-09 珠海市钧兴机电有限公司 Gear testing assembly and testing device
CN117367791B (en) * 2023-12-08 2024-02-06 珠海市钧兴机电有限公司 Gear testing assembly and testing device

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