CN111577865A - Gear transmission pair and chainless bicycle - Google Patents

Gear transmission pair and chainless bicycle Download PDF

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Publication number
CN111577865A
CN111577865A CN202010537902.4A CN202010537902A CN111577865A CN 111577865 A CN111577865 A CN 111577865A CN 202010537902 A CN202010537902 A CN 202010537902A CN 111577865 A CN111577865 A CN 111577865A
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CN
China
Prior art keywords
gear
tooth
concave
teeth
transmission pair
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Pending
Application number
CN202010537902.4A
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Chinese (zh)
Inventor
黄秋荣
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Individual
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Individual
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Publication date
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Priority to CN202010537902.4A priority Critical patent/CN111577865A/en
Publication of CN111577865A publication Critical patent/CN111577865A/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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M11/00—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels
    • B62M11/02—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels of unchangeable ratio
    • 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
    • F16H1/00—Toothed gearings for conveying rotary motion
    • F16H1/02—Toothed gearings for conveying rotary motion without gears having orbital motion
    • F16H1/04—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members
    • 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
    • F16H1/00—Toothed gearings for conveying rotary motion
    • F16H1/02—Toothed gearings for conveying rotary motion without gears having orbital motion
    • F16H1/04—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members
    • F16H1/06—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with parallel axes
    • 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
    • F16H1/00—Toothed gearings for conveying rotary motion
    • F16H1/02—Toothed gearings for conveying rotary motion without gears having orbital motion
    • F16H1/04—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members
    • F16H1/12—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with non-parallel axes
    • 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
    • F16H55/08—Profiling
    • 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
    • F16H55/08—Profiling
    • F16H55/0826—Novikov-Wildhaber profile

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Gears, Cams (AREA)

Abstract

The invention discloses a gear transmission pair and a chainless bicycle, wherein the gear transmission pair comprises a first gear and a second gear which are meshed with each other in pairs; the first gear comprises a first gear body, a plurality of first teeth are uniformly arranged on the circumferential surface of the first gear body, and the first teeth are spherical surfaces protruding outwards; the second gear comprises a second gear body, and a plurality of second teeth are uniformly arranged on the circumferential surface of the second gear body; a concave tooth socket which is matched with the first tooth in a shape fitting manner is formed between every two adjacent second teeth in a sinking manner, and the meshing surface of the concave tooth socket is a concave cambered surface; according to the invention, the first tooth is set to be spherical, the concave tooth socket of the second tooth is set to be a concave arc surface, the arrangement of the tooth and the tooth socket is simple, the difficulty of gear design is reduced, and the processing difficulty caused by overhigh precision requirement of part of parameters is also reduced.

Description

Gear transmission pair and chainless bicycle
Technical Field
The invention relates to a gear transmission pair and a chainless bicycle.
Background
The gear refers to a mechanical element with a gear on a wheel rim which is continuously meshed to transmit motion and power, and the gear is extremely widely applied to mechanical transmission and the whole mechanical field. However, after the gear parameters of the existing gear pair are fixed, the meshing angle between the gears cannot be adjusted, and the existing gear parameters are complex to set, high in parameter precision requirement and high in design and processing difficulty.
Disclosure of Invention
The invention aims to provide a gear transmission pair and a chainless bicycle, and aims to solve the problems that the existing gear pair is complex in gear parameter setting, high in parameter precision requirement and high in design and processing difficulty.
In order to solve the technical problem, the invention provides a gear transmission pair, which comprises a first gear and a second gear which are meshed with each other to form a pair; the first gear comprises a first gear body, a plurality of first teeth are uniformly arranged on the circumferential surface of the first gear body, and the first teeth are spherical surfaces protruding outwards; the second gear comprises a second gear body, and a plurality of second teeth are uniformly arranged on the circumferential surface of the second gear body; a concave tooth socket which is matched with the first tooth in a shape fitting manner is formed between every two adjacent second teeth in a sinking manner, and the meshing surface of the concave tooth socket is a concave cambered surface; the first tooth is inserted into the concave tooth groove, and continuous meshing operation of the first gear and the second gear is realized.
Furthermore, the meshing surface of the concave tooth groove is a concave circular arc surface which is matched with the first tooth in a shape fitting manner.
Furthermore, the concave tooth grooves are uniformly distributed in the middle of the circumferential surface of the second gear; when the first teeth are inserted into the concave tooth grooves and completely overlapped with the concave tooth grooves, the distance between the tooth root circle and the tooth top circle of the second gear is smaller than or equal to the radius of the first teeth.
Furthermore, the concave tooth grooves are uniformly distributed at the junction of the circumferential surface of the second gear body and one end surface of the second gear body; when the first tooth is inserted into the concave tooth groove and is completely overlapped with the concave tooth groove, the tooth crest of the second tooth does not exceed the spherical center of the first tooth.
Further, the first teeth are fixed on the circumferential surface of the first gear body.
Further, the first teeth and the first gear body are integrally formed.
Further, the circle center of the first tooth is located on the circumferential surface of the first gear body.
Further, the first tooth is rotatably mounted on the circumferential surface of the first gear body.
Furthermore, first tooth is spherical, be equipped with on the periphery of first gear body a plurality of with the fit type complex spacing groove of first tooth, first tooth is installed the spacing inslot, just the centre of sphere of first tooth is located the spacing inslot portion.
Furthermore, a first shaft mounting hole is formed in the middle of the first gear, and a second shaft mounting hole is formed in the middle of the second gear.
In addition, the application also provides a chainless bicycle which comprises the gear transmission pair.
The invention has the beneficial effects that: through establishing first tooth into the sphere, establish the concave surface tooth's socket of second tooth into the concave arc face, tooth and tooth's socket are arranged simply, have reduced the degree of difficulty of gear design, have still reduced simultaneously because the too high processing degree of difficulty of some parameter accuracy requirements. In addition, the gear transmission pair is meshed with a concave tooth groove on the second gear through a first tooth on the first gear, and the first tooth is inserted into the concave tooth groove during operation, so that the continuous meshing operation of the first gear and the second gear is realized; by enabling the first tooth to be in contact with the spherical surface of the concave tooth socket, the meshing angle between the first gear and the second gear can be adjusted as required in the using process, and the continuous transmission of the first gear and the second gear is not influenced;
drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a schematic structural diagram of a gear transmission pair according to an embodiment of the present invention.
FIG. 2 is a front view of a gear train of one embodiment of the present invention.
FIG. 3 is a left side view of a gear train of one embodiment of the present invention.
FIG. 4 is a bottom view of a gear train of one embodiment of the present invention.
Fig. 5 is a schematic structural view of a gear transmission pair according to another embodiment of the present invention.
FIG. 6 is a front view of a gear train of another embodiment of the present invention.
FIG. 7 is a top view of a second gear in accordance with one embodiment of the present invention.
Fig. 8 is a schematic structural view of a second gear according to an embodiment of the present invention.
Fig. 9 is a schematic structural view of a second gear according to another embodiment of the present invention.
Wherein: 1. a first gear body; 11. a first tooth; 12. a first shaft mounting hole; 2. a second gear body; 21. a second tooth; 22. a concave gullet; 23. and a second shaft mounting hole.
Detailed Description
A gear train as shown in figures 1 and 5, the gear train comprising a first gear and a second gear in meshing pairs; the first gear comprises a first gear body 1, a plurality of first teeth 11 are uniformly arranged on the circumferential surface of the first gear body 1, and the first teeth 11 are spherical surfaces protruding outwards; the second gear comprises a second gear body 2 and a second gear body 2, and a plurality of second teeth 21 are uniformly arranged on the circumferential surface of the second gear body 2; a concave tooth groove 22 which is matched with the first tooth 11 in a shape fitting manner is formed between every two adjacent second teeth 21 in a sinking manner, and the meshing surface of the concave tooth groove 22 is a concave circular arc surface; the first tooth 11 is inserted into the concave gullet 22, and continuous meshing operation of the first gear and the second gear is realized.
Through establishing first tooth 11 as the sphere, establish concave surface tooth's socket 22 of second tooth 21 as the concave circular arc face, tooth and tooth's socket are arranged simply, have reduced the degree of difficulty of gear design, have still reduced simultaneously because the too high processing degree of difficulty of some parameter accuracy requirements, the manufacturing of being convenient for. In addition, the first tooth 11 is in spherical contact with the concave tooth groove 22, so that the contact area during meshing is increased, the contact stress between gears is dispersed compared with the conventional gears, and the service life of the gear pair is prolonged.
According to one embodiment of the present application, as shown in fig. 5, 6, 7 and 9, the concave gullets 22 are evenly distributed in the middle of the circumferential surface of the second gear body 2; when the first tooth 11 is inserted into the concave gullet 22 and completely coincides with the concave gullet 22, the tooth crest of the second tooth 21 does not exceed the spherical center of the first tooth 11; when the first tooth 11 and the concave tooth groove 22 are completely overlapped, as shown in fig. 7, the distance between the root circle and the tip circle of the second gear 21 is equal to or less than the radius of the first tooth 11 (the radius is the radius of the sphere corresponding to the spherical surface of the first tooth 11), so that the first tooth 11 can be smoothly separated from the concave tooth groove 22, and the smooth operation can be ensured.
In addition, when the distance between the root circle and the tip circle of the second gear 21 is smaller than the radius of the first tooth 11, the meshing angle between the first gear and the second gear can be adjusted according to needs during use, and once the gear parameters of the conventional gear are fixed, the meshing angle between the gears cannot be adjusted.
According to an embodiment of the present application, as shown in fig. 1-4 and 8, the concave tooth grooves 22 are uniformly distributed at the intersection of the circumferential surface of the second gear body 2 and one end surface of the second gear; when the first tooth 11 is inserted into the concave gullet 22 and completely coincides with the concave gullet 22, the crest of the second tooth 21 does not exceed the spherical center of the first tooth 11. At this time, the first gear and the second gear realize two-axis intersecting transmission (usually 90 degrees), and in practical application, the two gears can be designed to rotate around a tangent line of the intersection point of the first tooth 11 and the concave tooth groove 22 as an axis to change the angle between the two gears appropriately.
According to one embodiment of the application, the first tooth 11 is fixed on the circumferential surface of the first gear body 1. By fixing the first teeth 11 to the circumferential surface of the first gear body 1, the stability of the first teeth 11 can be improved, and the connection strength between the first gear and the first teeth 11 can be enhanced.
According to an embodiment of the present application, the first tooth 11 is integrally formed with the first gear body 1; by adopting the integral forming process, the gear can be processed more conveniently, the structural rigidity of the first teeth 11 and the first gear can be improved, the product is more durable, and the service life of the gear transmission pair is prolonged.
According to one embodiment of the present application, the first tooth 11 is centered on the circumferential surface of the first gear body 1. At this time, the contact surface between the first gear and the first gear body 1 is the largest, so that the torque resistance of the first gear can be the strongest.
According to one embodiment of the application, the first tooth 11 is rotatably mounted on the circumferential surface of the first gearwheel. Compared with a fixed connection mode, the friction force between the first tooth 11 and the concave tooth groove 22 can be reduced to the greatest extent, and the transmission efficiency is improved.
According to an embodiment of the application, first tooth 11 is spherical, be equipped with on the periphery of first gear body 1 a plurality of with 11 suitable type complex spacing grooves of first tooth, first tooth 11 is installed the spacing inslot, just the centre of sphere of first tooth 11 is located the spacing inslot portion. The spherical center of the first tooth 11 is located in the limiting groove, the opening part which can be reduced by the limiting groove is used for locking the first tooth 11 in the limiting groove, the first tooth 11 can be effectively prevented from being separated from the limiting groove on the first gear, and the stability of gear transmission is ensured. Of course, the ball core can also be locked in the limiting groove by arranging the releasing device, which is not described herein again.
According to one embodiment of the application, the first gear is provided with a first shaft mounting hole 12 in the middle and the second gear is provided with a second shaft mounting hole 23 in the middle. The first and second gears are connected to the input shaft or the propeller shaft through the first and second shaft mounting holes 12 and 23, respectively.
In addition, the application also provides a chainless bicycle which comprises the gear transmission pair. The chainless bicycle with the gear transmission pair is easier to realize speed change than the existing gear transmission.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.

Claims (10)

1. A gear transmission pair is characterized by comprising a first gear and a second gear which are meshed in pairs;
the first gear comprises a first gear body, a plurality of first teeth are uniformly arranged on the circumferential surface of the first gear body, and the first teeth are spherical surfaces protruding outwards;
the second gear comprises a second gear body, and a plurality of second teeth are uniformly arranged on the circumferential surface of the second gear body; a concave tooth socket matched with the first tooth is formed between every two adjacent second teeth in a sinking mode, and the meshing surface of the concave tooth socket is a concave arc surface;
the first tooth is inserted into the concave tooth groove, and continuous meshing operation of the first gear and the second gear is realized.
2. The gear transmission pair of claim 1, wherein the engaging surface of the concave gullet is a concave circular arc surface that fits snugly with the first tooth.
3. The gear transmission pair of claim 2, wherein the concave gullets are evenly distributed in the middle of the circumferential surface of the second gear body; when the first teeth are inserted into the concave tooth grooves and completely overlapped with the concave tooth grooves, the distance between the tooth root circle and the tooth top circle of the second gear is smaller than or equal to the radius of the first teeth.
4. The gear transmission pair of claim 2, wherein the concave tooth grooves are uniformly distributed at the junction of the circumferential surface of the second gear body and one end surface of the second gear body; when the first tooth is inserted into the concave tooth groove and is completely overlapped with the concave tooth groove, the tooth crest of the second tooth does not exceed the spherical center of the first tooth.
5. A gear transmission pair according to any of claims 2 to 4, wherein the first tooth is fixed to the circumferential surface of the first gear body.
6. The gear transmission pair of claim 5, wherein said first tooth is integrally formed with said first gear body.
7. A gear transmission pair according to any of claims 2 to 4, wherein the first tooth is rotatably mounted on the circumferential surface of the first gear body.
8. The gear transmission pair according to claim 7, wherein the first teeth are spherical, a plurality of limiting grooves are formed in the circumferential surface of the first gear body and are in fit with the first teeth, the first teeth are mounted in the limiting grooves, and the spherical centers of the first teeth are located in the limiting grooves.
9. The gear transmission pair of claim 1, wherein a first shaft mounting hole is provided in a middle portion of the first gear, and a second shaft mounting hole is provided in a middle portion of the second gear.
10. A chainless bicycle, characterised in that it comprises a gear transmission pair according to any of claims 1-9.
CN202010537902.4A 2020-06-12 2020-06-12 Gear transmission pair and chainless bicycle Pending CN111577865A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010537902.4A CN111577865A (en) 2020-06-12 2020-06-12 Gear transmission pair and chainless bicycle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010537902.4A CN111577865A (en) 2020-06-12 2020-06-12 Gear transmission pair and chainless bicycle

Publications (1)

Publication Number Publication Date
CN111577865A true CN111577865A (en) 2020-08-25

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ID=72116307

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010537902.4A Pending CN111577865A (en) 2020-06-12 2020-06-12 Gear transmission pair and chainless bicycle

Country Status (1)

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CN (1) CN111577865A (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100069166A1 (en) * 2006-10-27 2010-03-18 Torvec, Inc. Spherical universal coupling
DE102008050710A1 (en) * 2008-10-07 2010-04-08 Rudi Werner Rotary piston engine has basic form of spherical sector gearwheel pair which arises from obtuse-angled spherical sector, where acute-angled spherical section tooth heads are accommodated in spherical sector cone-shaped shell surfaces
CN110273979A (en) * 2019-06-26 2019-09-24 长春理工大学 A kind of Three Degree Of Freedom button transmission
CN110645320A (en) * 2019-10-16 2020-01-03 长春理工大学 Spherical gear and toothed disc mechanism
CN212360707U (en) * 2020-06-12 2021-01-15 黄秋荣 Gear transmission pair and chainless bicycle

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100069166A1 (en) * 2006-10-27 2010-03-18 Torvec, Inc. Spherical universal coupling
DE102008050710A1 (en) * 2008-10-07 2010-04-08 Rudi Werner Rotary piston engine has basic form of spherical sector gearwheel pair which arises from obtuse-angled spherical sector, where acute-angled spherical section tooth heads are accommodated in spherical sector cone-shaped shell surfaces
CN110273979A (en) * 2019-06-26 2019-09-24 长春理工大学 A kind of Three Degree Of Freedom button transmission
CN110645320A (en) * 2019-10-16 2020-01-03 长春理工大学 Spherical gear and toothed disc mechanism
CN212360707U (en) * 2020-06-12 2021-01-15 黄秋荣 Gear transmission pair and chainless bicycle

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