CN114151532A - Coupling bionic driving wheel capable of improving traction force of wheel type tractor - Google Patents

Coupling bionic driving wheel capable of improving traction force of wheel type tractor Download PDF

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Publication number
CN114151532A
CN114151532A CN202111352429.3A CN202111352429A CN114151532A CN 114151532 A CN114151532 A CN 114151532A CN 202111352429 A CN202111352429 A CN 202111352429A CN 114151532 A CN114151532 A CN 114151532A
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wheel
driving wheel
traction force
coupling
tractor
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Inventor
吴伟
王方
李超
王金超
白保鑫
黄宇坤
刑鑫
张建伟
刘天乔
张力凡
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Xian Shiyou University
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Xian Shiyou University
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H55/00Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/02Toothed members; Worms
    • F16H55/17Toothed wheels
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B41/00Equipment or details not covered by groups E21B15/00 - E21B40/00

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  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Mechanical Engineering (AREA)
  • Tires In General (AREA)

Abstract

The invention belongs to the technical field of logging equipment, and relates to a coupling bionic driving wheel capable of improving traction force of a wheel type tractor, wherein a tooth surface of a gear tooth is provided with a convex structure imitating the appearance and grains of the surface of an arca subcrenata Lischke shell; when the driving wheel runs along the pipe wall under the action of a certain positive pressure, the gear teeth can generate a furrow effect when being wedged on the surface of the pipeline, and a certain groove is left on the surface of the pipeline, and the design of the cylindrical coupling element structure can increase the friction force between the tooth surface of the gear teeth and the pipe wall, so that the traction force of the wheel tractor is improved, the subsequent use of the sleeve is not influenced, and the driving wheel has better traction characteristics compared with the conventional driving wheel; meanwhile, the design of the convex spherical coupling body structure can also enhance the obstacle crossing capability and the de-sticking and de-attaching capability of the tractor driving wheel, and improve the wear resistance and the heat dissipation capability of the wheel teeth, thereby prolonging the service life of the driving wheel.

Description

Coupling bionic driving wheel capable of improving traction force of wheel type tractor
Technical Field
The invention belongs to the technical field of logging equipment, relates to a wheel type tractor, and particularly relates to a coupling bionic driving wheel capable of improving traction force of the wheel type tractor.
Background
With the rapid development of social economy, the demand of various industries on oil is increasing day by day, and the transition from a middle-shallow layer to a deep layer in oil exploitation becomes a necessary trend. In the process of deep oil exploitation, faults of different degrees always exist, and normal production of petroleum and natural gas can be guaranteed only by carrying out certain workover operation and test work, so that higher requirements are provided for the conveying capacity of a conveying tool of a logging instrument.
However, with the increase of the mining depth, the existing horizontal well wheel type tractor needs to overcome the defects that the friction resistance between a cable and a well wall is increased, the traction force of the tractor is insufficient, and an operation tool is difficult to reach a target layer; in addition, because there is friction between the gear teeth and the pipe wall, the tooth top abrasive dust is not discharged timely and is easy to wear, and when the driving wheel climbs over obstacles, the residual abrasive dust on the tooth surface is easy to scratch the tooth surface. Therefore, how to increase the traction force of the tractor and prolong the service life of the driving wheel is a problem which needs to be solved urgently at present.
In view of the above problems, the following solutions are proposed by the present researchers: the plow groove friction coefficient is improved by changing the tooth form of the driving wheel tooth, so as to increase the traction force, but the adopted conical and triangular prism-shaped sharp teeth have the problems of easy abrasion, insufficient strength and the like; secondly, the traction force of the tractor is improved by designing a dovetail slide block locking mechanism, but the working efficiency of the tractor cannot be ensured when the tractor stretches and moves forwards.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a coupling bionic driving wheel capable of improving traction force of a wheel type tractor, which improves the traction force of the tractor, enhances the obstacle crossing capability and the debonding and adhesion reducing capability of the traction driving wheel, and improves the wear resistance and the heat dissipation capability of the wheel teeth, thereby prolonging the service life of the driving wheel.
In order to achieve the purpose, the invention provides the following technical scheme:
the coupling bionic driving wheel capable of improving traction force of the wheel type tractor comprises a plurality of wheel teeth, wherein the tooth surfaces of the wheel teeth are provided with convex structures imitating the appearance and grains of the surface of a clam shell.
Furthermore, protruding structure is including the column type coupler body structure that is located the teeth of a cogwheel top surface, is located the protruding ball type coupler body structure of teeth of a cogwheel both sides face, column type coupler body structure is including being a plurality of column units that the array was arranged, protruding ball type coupler body structure is including being a plurality of protruding balls that the array was arranged.
Further, the surface distribution rate of the convex balls on the side surfaces of the gear teeth is 12% -20%.
Furthermore, the diameter of the convex ball is 0.1-0.7 mm.
Furthermore, the distance between the centers of the adjacent convex balls is 1-3 mm.
Further, the rectangular coupler body structure can be used for replacing the cylindrical coupler body structure, and the rectangular coupler body structure comprises a plurality of rectangular units which are arranged in an array mode.
Furthermore, the surface distribution rate of the columnar units on the top surfaces of the gear teeth is 18% -25%.
Further, the size of the columnar unit is (phi 0.1-phi 0.7) mmx (1-7) mm.
Furthermore, a plurality of columnar units are arranged on the top surface of the gear teeth in rows and columns, the distance between adjacent columnar units in the same row is 0.1-0.5 mm, and the distance between adjacent columnar units in the same row is 0.5-1 mm.
Further, the coupling bionic driving wheel is made of 30CrNiMo alloy steel materials.
Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects: the tooth surface of the gear tooth is processed with a convex structure imitating the appearance and grains of the shell surface of the scapharca subcrenata, and the convex structure comprises a column-shaped coupler body structure positioned on the top surface of the gear tooth and convex-spherical coupler body structures positioned on two side surfaces of the gear tooth; when the driving wheel runs along the pipe wall under the action of a certain positive pressure, the gear teeth can generate a furrow effect when being wedged on the surface of the pipeline, and a certain groove is left on the surface of the pipeline, and the design of the columnar coupler body structure can increase the friction force between the gear teeth and the pipe wall, so that the traction force of the wheel tractor is improved, the subsequent use of the sleeve is not influenced, and the driving wheel has better traction characteristics compared with the conventional driving wheel; meanwhile, the design of the convex spherical coupling body structure can also enhance the obstacle crossing capability and the de-sticking and de-attaching capability of the tractor driving wheel, and improve the wear resistance and the heat dissipation capability of the wheel teeth, thereby prolonging the service life of the driving wheel.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
FIG. 1 is a structural diagram of a coupling bionic driving wheel capable of improving traction force of a wheel tractor according to the present invention;
FIG. 2 is a partial view of FIG. 1;
FIG. 3 is a side view of FIG. 1;
FIG. 4 is a schematic diagram illustrating the obstacle surmounting principle of the convex spherical surface according to the present invention;
FIG. 5 is a schematic diagram of the friction resistance increase of the convex ball surface of the driving wheel according to the present invention;
FIG. 6 is a schematic view of the action of the convex balls and the grinding dust on the side surface of the gear teeth in the present invention;
FIG. 7 is a schematic view of the action of the columnar elements on the top surface of the gear teeth and the grinding dust of the present invention;
FIG. 8 is a schematic diagram of a rectangular coupler structure according to the present invention;
FIG. 9 is a schematic diagram of a cylindrical coupler body according to the present invention;
FIG. 10 shows the coefficient of friction f of the convex ball of the present invention1The diameter D of the convex sphere and the diameter D of the projection circle on the horizontal plane1The corresponding relation graph of (2);
FIG. 11 shows the coefficient of friction f of the columnar cells of the present invention3Curve corresponding to the radius R of the cylinder.
Wherein: 1. gear teeth; 2. a columnar coupler structure; 3. a convex ball type coupler body structure; 4. a columnar unit; 5. a convex ball; 6. a rectangular parallelepiped cell.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus consistent with certain aspects of the invention, as detailed in the appended claims.
The invention provides a coupling bionic driving wheel capable of improving traction force of a wheel type tractor, wherein a raised structure imitating the appearance and grains of the surface of an arca subcrenata shell is processed on the tooth surface of a bionic gear by researching the surface characteristics of the shells of the clams and the arca subcrenata, and the raised structure can increase the furrow friction force between the raised structure and the wall of a pipeline so as to improve the traction capacity.
In order to make those skilled in the art better understand the technical solution of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings and examples.
Example 1
The invention provides a coupling bionic driving wheel capable of improving traction force of a wheel type tractor, wherein a tooth surface of a gear tooth 1 of the coupling bionic driving wheel is provided with a convex structure imitating morphology grains of shells of clams and blood clams; the protruding structure comprises a cylindrical coupler body structure 2 located on the top surface of the gear teeth 1 and a convex ball type coupler body structure 3 located on the two side surfaces of the gear teeth 1, wherein the cylindrical coupler body structure 2 comprises a plurality of columnar units 4 arranged in an array, and the convex ball type coupler body structure 3 comprises a plurality of convex balls 5 arranged in an array.
It should be emphasized that the design of the convex-ball coupler body structure 3 on both sides of the gear teeth aims to: firstly, when a driving wheel crosses a step obstacle at a pipeline coupling, a convex ball type coupling body structure 3 is shown in fig. 4, on one hand, the friction coefficient is increased by ploughing the pipe wall so as to increase the motion resistance in the friction process, and on the other hand, the friction coefficient is shown in fig. 5 (a); on the other hand, the convex part of the convex ball type coupling element structure 3 is meshed with the convex part of the friction pair, so that the movement resistance during friction can be increased, the normal temperature friction coefficient is increased, as shown in fig. 5(b), the gripping force of the driving wheel is improved, and the obstacle crossing capability of the tractor is improved, as shown in fig. 6; secondly, the convex spherical coupler body structure 3 can reduce the contact area between abrasive dust and the tooth surface and the number of pressure adsorption points between two contact surfaces, and can reduce the abrasion and damage of the abrasive dust to the tooth surface; and the convex spherical coupler body structure 3 destroys the continuity of contact between the abrasive dust and the tooth surface, so that a clearance space exists between the abrasive dust and the tooth surface, and the convex spherical coupler body structure has certain prying and stripping functions, so that the abrasive dust is difficult to adhere to the tooth surface.
Simultaneously, set up the purpose of post type coupler body structure 2 at the 1 top surface of teeth of a cogwheel: firstly, the columnar coupler body structure 2 is distributed according to the rib structure to form a non-smooth structure, so that the columnar coupler body structure has good wear resistance, has better friction characteristics than the convex balls 5, can increase the traction capacity of a driving wheel, and is distributed as shown in fig. 7; the columnar coupler body structure 2 has good prying and stripping effects on the original tooth surface, and can reduce the tooth top abrasion damage of the gear teeth to a certain extent, thereby prolonging the service life of the driving wheel and keeping the stable traction capacity of the driving wheel; the surface area of the top surface of the gear teeth 1 is increased by the column-shaped coupler body structure 2, so that the heat dissipation capacity is good, and the wear-resisting stability of the column-shaped coupler body structure 2 is kept.
Further, the surface distribution rate of the convex balls 5 on the side surface of the gear teeth 1 is 12% -20%, so that the side surface of the gear teeth 1 of the driving wheel forms a non-smooth structure to ensure good friction characteristics.
Furthermore, the diameter of the convex ball 5 is 0.1-0.7 mm.
Further, the distance between the centers of the adjacent convex balls 5 is 1-3 mm.
Further, the surface distribution rate of the columnar units 4 on the top surface of the gear teeth 1 is 18% -25%, so that the top surface of the driving wheel gear teeth 1 forms a non-smooth structure to ensure good friction characteristics.
Further, the size of the columnar unit 4 is (Φ 0.1 to Φ 0.7) mmx (1 to 7) mm.
Further, a plurality of column unit 4 ranks are arranged in teeth of a cogwheel 1 top surface, and the interval of the adjacent column unit 4 of same row is 0.1 ~ 0.5mm, and the interval of the adjacent column unit 4 of same row is 0.5 ~ 1 mm.
Further, the coupling bionic driving wheel is made of 30CrNiMo alloy steel materials.
Example 2
Referring to fig. 1-3, the wheel tractor coupling bionic driving wheel provided by the invention comprises 30 gear teeth 1, wherein 39 convex balls 5 are respectively arranged on the side surface of each gear tooth 1, 3 axial rows are uniformly embedded in the side surface of each gear tooth 1 in parallel, 16 columnar units 4 are arranged on the top surface of each gear tooth 1, and 2 axial rows are uniformly embedded in the top surface of each gear tooth 1 in parallel. Specifically, the diameter of the coupling bionic driving wheel is 60mm, and the modulus is 2; the diameters of the convex balls 5 are all 0.6mm, the sizes of the columnar units 4 are phi 0.6 multiplied by 1mm, the center distance between the adjacent convex balls 5 is 1mm, 16 columnar units 4 are arranged on the top surface of the gear teeth in rows and columns, the distance between the adjacent columnar units 4 in the same row is 0.3mm, and the distance between the adjacent columnar units 4 in the same row is 0.8 mm. The number and the arrangement mode of the convex balls 5 and the columnar units 4 can be determined according to the size of the coupling bionic driving wheel.
As an alternative or preferred embodiment of the present embodiment, the convex balls 5 have a surface distribution rate of 12% on the side surface of the gear tooth 1, and the cylindrical elements 4 have a surface distribution rate of 18% on the top surface of the gear tooth 1, so that the tooth surface of the driving wheel is formed into a non-smooth structure to ensure good friction characteristics.
As an optional or preferred embodiment of this embodiment, the coupling bionic driving wheel is made of 30CrNiMo alloy steel, has good wear resistance, corrosion resistance, strength and toughness, and can directly crush impurities in the well, thereby ensuring the stable operation of the tractor and the working efficiency.
In the coupling bionic driving wheel provided by the embodiment, the two side surfaces of the wheel teeth 1 are respectively provided with 39 convex balls 5, and after mechanical property analysis is carried out on the convex balls, the friction coefficient f of the coupling bionic driving wheel is1The calculation formula of (2) is as follows:
Figure BDA0003356317430000071
wherein N is1Is furrow power, F1Normal load, d1The depth of the round convex ball pressed into the pipeline is delta1When the diameter of the projected circle of the contact surface on the horizontal plane, D is the diameter of the convex ball 5, D is the actual working process of the tractor1D is less than or equal to D, and the maximum furrow friction coefficient of the coupling bionic driving wheel is 0.424 as can be seen in the graph of 10.
In the coupling bionic driving wheel provided by the embodiment, the cylindrical coupling element body structure 2 (composed of 16 semi-cylindrical units) is arranged on the top surface of the gear teeth, and the friction coefficient is denoted as f in fig. 93As can be seen from fig. 11, the coefficient of friction of the cylindrical coupler structure 2 gradually decreases with increasing radius and tends to be 0.625. Considering the area of the top surface of the driving wheel gear teeth 1 and the condition that 16 semi-columnar units are uniformly arranged in two rows, and the like, the cylindrical radius R is 0.3mm, and the press-in depth delta is selected3The bionic cylinder structure is analyzed when the diameter is 0.2mm, and the friction coefficient f is measured at the moment3As a result of 2.5, it was found that the greater the wedging depth, the greater the furrow friction coefficient, with a constant radius.
Through the comparative analysis, the furrow friction coefficient of the column type coupler body structure 2 is larger than that of the convex ball type coupler body structure 3. The maximum furrow friction coefficient of the coupling bionic driving wheel of the uniformly distributed convex ball type coupling element body structure 3 is 0.424; when the wedge depth is 0.2mm, the furrow friction coefficient of the bionic coupling driving wheel column type coupling element body structure 2 is 2.5, the maximum furrow friction coefficient of the traditional driving wheel is 1.6, and the traction capacity of the bionic coupling driving wheel can be improved by 89% compared with that of the traditional driving wheel.
In addition, a rectangular coupler body structure (composed of 16 rectangular units 6) can be used to replace the cylindrical coupler body structure 2, and referring to fig. 8, the 16 rectangular units 6 are uniformly arranged on the top surface of the gear teeth 1 in four rows and four rows; due to the non-smooth structure, the wear-resisting wheel has good wear resistance and better friction characteristic than the convex ball 5, and can increase the traction capacity of the driving wheel; the rectangular coupler body structure has good prying and stripping effects on the original tooth surface, and can reduce the tooth top abrasion damage of the gear teeth to a certain extent, thereby prolonging the service life of the driving wheel and keeping the stable traction capacity of the driving wheel; the surface area of the top surface of the gear teeth 1 is increased due to the rectangular coupler body structure, so that the rectangular coupler body has good heat dissipation capacity and is beneficial to maintaining the wear-resisting stability of the rectangular coupler body.
This kind of coupling bionic drive wheel that this embodiment provided, it is applied to horizontal well wheel type tractor, when the drive wheel walked along the pipe wall under certain positive pressure effect, teeth of a cogwheel 1 can produce the furrow effect when the pipeline surface wedges, and leave certain slot on the pipeline surface, in order to ensure that the bionic coupling drive wheel that proposes can not influence the follow-up use of sleeve pipe, it has better traction characteristic compared with conventional drive wheel, the inventor of this application passes through Ansys workbench finite element software, under 3000N positive pressure effect, the deformation and the equivalent stress of sleeve pipe after conventional drive wheel and the bionic drive wheel effect are analyzed, refer to the following table:
Figure BDA0003356317430000081
the analysis shows that the maximum equivalent stress of the bionic driving wheel is greater than that of the conventional driving wheel and smaller than the yield limit of the pipeline material, and the bionic driving wheel can generate a furrow effect more easily than the conventional driving wheel under the same condition, cannot damage the pipe wall and influence the subsequent use of the sleeve, and can obtain larger driving force more easily than the conventional driving wheel.
In conclusion, the coupling bionic driving wheel provided by the invention has the advantages that the convex structure imitating the morphology grains on the surfaces of clams and blood clam shells processed on the tooth surfaces of the coupling bionic driving wheel has good wear resistance and heat dissipation capacity, and good obstacle-crossing gripping force, and meanwhile, the coupling bionic driving wheel can have good stripping effect on abrasive dust generated in the advancing process of a horizontal well wheel type tractor, and the service life of the driving wheel can be greatly prolonged.
The above description is only for the details of the technical solutions of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention.
It is to be understood that the present invention is not limited to what has been described above, and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.

Claims (10)

1. The coupling bionic driving wheel capable of improving traction force of the wheel type tractor comprises a plurality of wheel teeth (1) and is characterized in that a protruding structure imitating the appearance and grains of the surface of an arca subcrenata shell is machined on the tooth surface of each wheel tooth (1).
2. The coupling bionic driving wheel capable of improving traction force of a wheel tractor according to claim 1, wherein the protruding structure comprises a cylindrical coupling element structure (2) located on the top surface of the wheel tooth (1), and convex ball type coupling element structures (3) located on two side surfaces of the wheel tooth (1), the cylindrical coupling element structure (2) comprises a plurality of cylindrical units (4) arranged in an array, and the convex ball type coupling element structure (3) comprises a plurality of convex balls (5) arranged in an array.
3. The coupling bionic driving wheel capable of improving traction force of wheel tractor according to claim 2, characterized in that the surface distribution rate of the convex ball (5) on the side of the wheel tooth (1) is 12% -20%.
4. The coupling bionic driving wheel capable of improving traction force of a wheel tractor as claimed in claim 3, wherein the diameter of the convex ball (5) is 0.1-0.7 mm.
5. The coupling bionic driving wheel capable of improving the traction force of the wheel tractor as claimed in claim 3, wherein the distance between the centers of the balls of the adjacent convex balls (5) is 1-3 mm.
6. The coupled bionic drive wheel capable of improving traction of a wheel tractor according to claim 2, characterized in that the cylindrical coupling element structure (2) is replaced by a rectangular coupling element structure, which comprises a plurality of cuboid units (6) arranged in an array.
7. The coupling bionic driving wheel capable of improving traction force of wheel tractor according to claim 2 is characterized in that the surface distribution rate of the cylindrical units (4) on the top surface of the wheel tooth (1) is 18% -25%.
8. The coupling bionic driving wheel capable of improving traction force of wheel tractor according to claim 7 is characterized in that the size of the columnar unit (4) is (phi 0.1-phi 0.7) mmx (1-7) mm.
9. The coupling bionic driving wheel capable of improving traction force of the wheel tractor as claimed in claim 7, wherein the plurality of column-shaped units (4) are arranged on the top surface of the wheel tooth (1) in rows and columns, the interval between adjacent column-shaped units (4) in the same row is 0.1-0.5 mm, and the interval between adjacent column-shaped units (4) in the same row is 0.5-1 mm.
10. The coupled bionic driving wheel capable of improving traction force of the wheel tractor as claimed in claim 1, wherein the coupled bionic driving wheel is made of 30CrNiMo alloy steel material.
CN202111352429.3A 2021-11-16 2021-11-16 Coupling bionic driving wheel capable of improving traction force of wheel type tractor Pending CN114151532A (en)

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN204553693U (en) * 2015-03-24 2015-08-12 浙江大学 A kind of roller-dear transmission device
CN105736676A (en) * 2016-04-21 2016-07-06 合肥工业大学 Gear with bionic tooth surfaces based on butterfly scale surface morphology
CN106763649A (en) * 2017-02-17 2017-05-31 合肥工业大学 A kind of cellular polygon Self-lubricating gear
CN206377230U (en) * 2016-12-05 2017-08-04 成都工业学院 A kind of gear
CN208237044U (en) * 2018-06-01 2018-12-14 常州华凯石墨烯应用科技有限公司 A kind of automobile application gear
CN208858895U (en) * 2018-09-29 2019-05-14 浙江东禾机电制造有限公司 A kind of gear set
CN211155571U (en) * 2019-07-24 2020-08-04 云鲸智能科技(东莞)有限公司 Driving wheel and cleaning robot
CN112112945A (en) * 2020-09-11 2020-12-22 华南理工大学 Gear with composite texture

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN204553693U (en) * 2015-03-24 2015-08-12 浙江大学 A kind of roller-dear transmission device
CN105736676A (en) * 2016-04-21 2016-07-06 合肥工业大学 Gear with bionic tooth surfaces based on butterfly scale surface morphology
CN206377230U (en) * 2016-12-05 2017-08-04 成都工业学院 A kind of gear
CN106763649A (en) * 2017-02-17 2017-05-31 合肥工业大学 A kind of cellular polygon Self-lubricating gear
CN208237044U (en) * 2018-06-01 2018-12-14 常州华凯石墨烯应用科技有限公司 A kind of automobile application gear
CN208858895U (en) * 2018-09-29 2019-05-14 浙江东禾机电制造有限公司 A kind of gear set
CN211155571U (en) * 2019-07-24 2020-08-04 云鲸智能科技(东莞)有限公司 Driving wheel and cleaning robot
CN112112945A (en) * 2020-09-11 2020-12-22 华南理工大学 Gear with composite texture

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