CN220118615U

CN220118615U - Speed regulating ball assembly and stepless speed change device

Info

Publication number: CN220118615U
Application number: CN202321441327.3U
Authority: CN
Inventors: 鲁奎钢
Original assignee: Ningbo Yuanhe Hardware Equipment Co ltd
Current assignee: Ningbo Yuanhe Hardware Equipment Co ltd
Priority date: 2023-06-07
Filing date: 2023-06-07
Publication date: 2023-12-01
Anticipated expiration: 2033-06-07

Abstract

The utility model relates to a speed regulating ball component and a stepless speed change device, wherein the speed regulating ball component comprises: a transmission shaft; the speed adjusting device comprises at least one speed adjusting bearing sleeved on the transmission shaft and a speed adjusting ring fixed on the outer ring of the speed adjusting bearing, wherein the part of the peripheral wall of the speed adjusting ring is convexly provided with poking teeth. The speed regulation device comprises a transmission shaft, a first hemisphere and a second hemisphere which are fixed on the transmission shaft, wherein the first hemisphere and the second hemisphere are respectively positioned on two sides of the speed regulation ring, the first hemisphere is provided with a first spherical curved surface, the second hemisphere is provided with a second spherical curved surface, the sphere center of the first spherical curved surface is coincident with the sphere center of the second spherical curved surface, and avoidance spaces for avoiding the speed regulation bearing are respectively arranged in the first hemisphere and the second hemisphere. And a speed regulation bearing is arranged in the speed regulation ring so as to improve the rotation flexibility and the support strength of the speed regulation ring, and the rotation track is stable and has small fluctuation.

Description

Speed regulating ball assembly and stepless speed change device

Technical Field

The utility model relates to the technical field of continuously variable transmission, in particular to a speed regulating ball assembly and a continuously variable transmission.

Background

The continuously variable star wheel transmission eliminates the traditional way of shifting the chain from one gear to another, by two rotating disks and a set of balls between them.

As disclosed in chinese patent CN209557606U, a continuously variable transmission for a bicycle includes a flywheel mechanism, a speed change mechanism and a rolling assembly, wherein the flywheel mechanism includes a first axle rod, a transmission gear and a first transmission gear, the first transmission gear and the transmission gear are connected to the first axle rod, and the transmission gear is sleeved with a transmission disc and an input assembly. The speed change mechanism comprises an eccentric gear and a first ball seat, the front end of the first ball seat is connected with a first auxiliary cover and a first main cover, and the rear part of the first ball seat is sleeved with an output assembly; the first main cover is connected with a plurality of eccentric gears, and tooth parts of the eccentric gears are meshed with the first transmission gear. The rolling assembly comprises a first rolling ball and a first ball shaft rod arranged in the first rolling ball, the front part of the first ball shaft rod is clamped in the first notch and the second notch, and the rear part of the first ball shaft rod is clamped in the first ball seat; the input assembly is connected with the front part of the first rolling ball, and the output assembly is connected with the rear part of the first rolling ball.

The ball is of a spherical structure and rotates through a friction structure, the technical problem that the ball of the continuously variable transmission is poor in rotation flexibility is solved, the assembly position of the ball is difficult to adjust, and the ball is easy to move along the axial direction to cause the technical problem of deflection, so that improvement is needed.

Disclosure of Invention

In order to overcome the problems in the related art, the embodiment of the utility model provides a speed regulating ball assembly and a stepless speed change device.

According to a first aspect of an embodiment of the present utility model, there is provided a speed dome assembly comprising:

a transmission shaft;

the speed adjusting device comprises at least one speed adjusting bearing sleeved on the transmission shaft and a speed adjusting ring fixed on the outer ring of the speed adjusting bearing, wherein the peripheral wall of the speed adjusting ring is provided with poking teeth in a partially protruding mode;

the speed regulation device comprises a transmission shaft, a first hemisphere and a second hemisphere which are fixed on the transmission shaft, wherein the first hemisphere and the second hemisphere are respectively positioned on two sides of the speed regulation ring, the first hemisphere is provided with a first spherical curved surface, the second hemisphere is provided with a second spherical curved surface, the sphere center of the first spherical curved surface is coincident with the sphere center of the second spherical curved surface, and avoidance spaces for avoiding the speed regulation bearing are respectively arranged in the first hemisphere and the second hemisphere.

In an embodiment, the speed adjusting bearing comprises a first bearing and a second bearing which are assembled on the transmission shaft, wherein an outer ring of the first bearing is connected with one side of the speed adjusting ring and extends towards the inside of the first hemisphere, and an outer ring of the second bearing is connected with the other side of the speed adjusting ring and extends towards the inside of the second hemisphere.

In an embodiment, the speed regulation ring comprises an annular rotating body, a first rotating shaft and a second rotating shaft which are partially protruded from the outer peripheral wall of the rotating body, the first rotating shaft and the second rotating shaft are coaxially arranged, the poking teeth are protruded from the rotating body and are located between the first rotating shaft and the second rotating shaft, the rotating body is provided with a bearing hole, and the first bearing and the second bearing are assembled to the rotating body from two ends of the bearing hole respectively.

In an embodiment, the speed adjusting ring comprises a positioning shaft shoulder formed by partially protruding from the hole wall of the bearing hole, and the first bearing and the second bearing are respectively abutted to the positioning shaft shoulder.

In an embodiment, the setting teeth include a height-adjusting boss, an extension portion, and a plurality of setting teeth that are distributed at intervals in the extension portion, the height-adjusting boss protrudes radially along the rotating body, and two ends of the extension portion protrude from the height-adjusting boss to the first hemispherical direction and the second hemispherical direction, respectively.

In an embodiment, the first hemisphere and the second hemisphere are respectively connected with the transmission shaft in an interference fit manner.

In an embodiment, the transmission shaft comprises a first shaft body, a mounting portion and a second shaft body which are distributed in sequence along the axial direction, the shaft diameter of the mounting portion is larger than that of the first shaft body, the speed regulating bearing is assembled on the mounting portion, the first hemisphere is connected with the first shaft body in an interference fit manner, and the second hemisphere is connected with the second shaft body in an interference fit manner.

In an embodiment, the outer peripheral walls of the first shaft body and the second shaft body are provided with a plurality of deformation grooves, and the deformation grooves are parallel to or spirally intersected with the axis of the transmission shaft.

In one embodiment, the sphere diameter of the first hemisphere is greater than the maximum outer diameter of the rotating body.

According to a second aspect of embodiments of the present utility model there is provided a continuously variable transmission comprising a flywheel mechanism, a variator and a rolling assembly, the variator comprising a plurality of speed ball assemblies as described above.

The technical scheme provided by the embodiment of the utility model can comprise the following beneficial effects: and a speed regulation bearing is arranged in the speed regulation ring so as to improve the rotation flexibility and the support strength of the speed regulation ring, and the rotation track is stable and has small fluctuation. The outer surfaces of the first hemispheroid and the second hemispheroid are spherical curved surfaces, and the first hemispheroid, the speed regulating ring and the second hemispheroid form a structure similar to a sphere, so that the sphere rotation function of the speed regulating sphere assembly can be met, and the flexibility and the structural consistency can be improved. The first hemisphere and the second hemisphere are fixed on the transmission shaft to constitute the independent processing of many parts, whole with low costs.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the utility model as claimed.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the utility model and together with the description, serve to explain the principles of the utility model.

Fig. 1 is a schematic diagram of a structure of a speed ball assembly according to an exemplary embodiment.

Fig. 2 is a schematic diagram of an exploded construction of a speed dome assembly, shown in accordance with an exemplary embodiment.

Fig. 3 is a schematic cross-sectional structural view of a speed ball assembly shown according to an exemplary embodiment.

Fig. 4 is a schematic structural view of a governor ring shown according to an exemplary embodiment.

Fig. 5 is a schematic structural view of a continuously variable transmission device according to an example embodiment.

Fig. 6 is a schematic sectional structure of a continuously variable transmission device shown according to an example embodiment.

In the figure, a governor ring 10; a rotating body 11; a setting tooth 12; raising boss 121; an extension 122; toggle teeth 123; an arcuate clearance surface 124; a first rotation shaft 13; a second rotating shaft 14; a bearing hole 15; positioning the shaft shoulder 16; a drive shaft 20; a first shaft body 21; a deformation groove 211; a second shaft body 22; a mounting portion 23; a second shaft body 22; a first hemisphere 30; a first spherically curved surface 31; an interference hole 32; a second hemisphere 40; a second spherically curved surface 41; an avoidance space 42; a speed adjusting bearing 50; a first bearing 51; a second bearing 52; a continuously variable transmission 60; a flywheel mechanism 61; a speed change mechanism 62.

Detailed Description

Wherein the drawings are for illustrative purposes only and are shown in schematic, non-physical, and not intended to be limiting of the present patent; for the purpose of better illustrating embodiments of the utility model, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the size of the actual product; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numbers in the drawings of embodiments of the utility model correspond to the same or similar components; in the description of the present utility model, it should be understood that, if the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, only for convenience in describing the present utility model and simplifying the description, rather than indicating or implying that the apparatus or elements being referred to must have a specific orientation, be constructed and operated in a specific orientation, so that the terms describing the positional relationships in the drawings are merely for exemplary illustration and should not be construed as limiting the present patent, and that the specific meaning of the terms described above may be understood by those of ordinary skill in the art according to specific circumstances.

In the description of the present utility model, unless explicitly stated and limited otherwise, the term "coupled" or the like should be interpreted broadly, as it may be fixedly coupled, detachably coupled, or integrally formed, as indicating the relationship of components; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between the two parts or interaction relationship between the two parts. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

As shown in fig. 1 to 3, the present utility model provides a speed adjusting ball assembly applied to a continuously variable transmission 60 to improve the flexibility of shifting.

The speed ball assembly includes a drive shaft 20, at least one speed bearing 50, a speed ring 10, a first hemisphere 30 and a second hemisphere 40, the first hemisphere 30 and the second hemisphere 40 being fixed to the drive shaft 20. The speed adjusting bearing 50 is sleeved and connected to the transmission shaft 20, the speed adjusting ring 10 is fixed on the outer ring of the speed adjusting bearing 50, and the first hemisphere 30 and the second hemisphere 40 are respectively positioned on two sides of the speed adjusting ring 10. The first hemisphere 30, the governor ring 10 and the second hemisphere 40 form an approximately spherical structure, wherein the first hemisphere 30 is provided with a first spherical curved surface 31, the second hemisphere 40 is provided with a second spherical curved surface 41, the center of the first spherical curved surface 31 and the center of the second spherical curved surface 41 coincide, and the first hemisphere 30 and the second hemisphere 40 form a part of the spherical surface. The outer surfaces of the first hemispheroids 30 and the second hemispheroids 40 are spherical curved surfaces, and the first hemispheroids 30, the speed regulating rings 10 and the second hemispheroids 40 form a structure similar to a sphere, so that the sphere rotation function of the speed regulating sphere assembly can be met, and the flexibility and the structural consistency can be improved. The first hemisphere 30 and the second hemisphere 40 are fixed to the transmission shaft 20 to constitute a multi-part independent process, and the overall cost is low.

The governor ring 10 is an annular structure with a rotational gap between the governor ring 10 and the first hemisphere 30 and a rotational gap between the governor ring 10 and the second hemisphere 40. The peripheral wall part of the speed regulation ring 10 is convexly provided with a poking tooth 12, and the poking tooth 12 is used for meshing and driving corresponding meshing parts when the speed regulation ring 10 rotates.

The speed adjusting ring 10 is fixed on the outer ring of the speed adjusting bearing 50, alternatively, the width of the outer ring of the speed adjusting bearing 50 is smaller than or equal to the width of the speed adjusting ring 10, accordingly, the first hemisphere 30 and the second hemisphere 40 are configured as solid structures, and the end surfaces are configured as planes; alternatively, the first hemisphere 30 and the second hemisphere 40 are configured as a thin-walled groove structure. When the width of the outer ring of the speed bearing 50 is greater than the width of the speed ring 10, the first hemisphere 30 and the second hemisphere 40 are provided with the avoidance space 42 for avoiding the speed bearing 50, so that the speed bearing 50 extends towards the inside of the avoidance space 42 of the first hemisphere 30 and/or the second hemisphere 40, thereby maintaining the flexible rotation of the speed ring 10. The speed regulation bearing 50 is installed in the speed regulation ring 10 to improve the rotation flexibility and the supporting strength of the speed regulation ring 10, and the rotation track is stable and has small fluctuation.

As shown in fig. 2 to 4, the number of the speed bearings 50 supporting the speed rings 10 may be set to one or two, and in an embodiment, the speed bearings 50 are set to two to improve the coupling strength of the speed rings 10 to the driving shaft 20 through the speed bearings 50, improving the stability of rotation. Wherein, the speed bearing 50 comprises a first bearing 51 and a second bearing 52 assembled on the transmission shaft 20, wherein an outer ring of the first bearing 51 is connected with one side of the speed adjusting ring 10 and extends towards the inside of the first hemisphere 30, and an outer ring of the second bearing 52 is connected with the other side of the speed adjusting ring 10 and extends towards the inside of the second hemisphere 40. The first bearing 51 and the second bearing 52 are arranged in parallel and jointly support the speed regulation ring 10, the parts of the first bearing 51 and the second bearing 52, which exceed the speed regulation ring 10, extend towards two sides of the speed regulation ring 10 along the transmission shaft 20 respectively, and the acting force transmitted by the speed regulation ring 10 can be supported by the speed regulation bearing 50, so that the rotation stability is good. The first hemisphere 30 is provided with the first void groove of recess form, and first bearing 51 extends towards first void inslot and sets up with first hemisphere 30 interval, forms crooked clearance that moves between first hemisphere 30, first bearing 51 and speed governing ring 10, improves the oil storage performance, improves lubricating property. Based on the same principle, the second hemisphere 40 is provided with a groove-shaped second clearance groove, the second bearing 52 extends into the second clearance groove and is arranged at a distance from the second hemisphere 40, and a curved movable gap is formed among the second hemisphere 40, the second bearing 52 and the governor ring 10.

The speed regulation ring 10 is an annular structural member, wherein the speed regulation ring 10 comprises an annular rotating body 11, a first rotating shaft 13 and a second rotating shaft 14 which are partially protruded from the peripheral wall of the rotating body 11, and the first rotating shaft 13 and the second rotating shaft 14 are coaxially arranged. The first shaft 13 and the second shaft 14 are used to connect the governor ring 10 to the speed change mechanism 62 to perform a speed change toggle function.

The rotating body 11 is formed with a bearing hole 15, and a first bearing 51 and a second bearing 52 are fitted to the rotating body 11 from both ends of the bearing hole 15, respectively. The bearing hole 15 is in interference fit with the outer ring of the speed bearing 50, and the bearing hole and the outer ring can mutually transmit acting force. Preferably, the governor ring 10 includes a positioning shoulder 16 formed to protrude partially from the wall of the bearing hole 15, and the first bearing 51 and the second bearing 52 are respectively abutted to the positioning shoulder 16. The positioning shoulder 16 can position the assembly positions of the first bearing 51 and the second bearing 52, thereby improving the assembly accuracy. Optionally, the height of the positioning shoulder 16 is less than or equal to the height of the outer race of the shaft bearing.

The setting teeth 12 protrude from the rotating body 11 and are located between the first and second rotating shafts 13 and 14, and preferably, the setting teeth 12 are located at the middle portions of the first and second rotating shafts 13 and 14 to equalize the amounts of both side motions. The setting teeth 12 include a height-adjusting boss 121, an extension portion 122, and a plurality of setting teeth 123 spaced apart from the extension portion 122, where the height-adjusting boss 121 protrudes along a radial direction of the rotating body 11, and two ends of the extension portion 122 protrude from the height-adjusting boss 121 toward the first hemisphere 30 and the second hemisphere 40, respectively. The height-adjusting boss 121 is a columnar protruding surface of the rotating body 11, the height-adjusting boss 121 and the extension portion 122 form a boss structure similar to a T shape, and the plurality of poking teeth 123 are distributed on the outer side of the extension portion 122 and the protruding direction of the poking teeth 123 is away from the rotating body 11. The length direction of the extension 122 is the same as the axial direction of the rotating body 11, and the tooth width direction of the poking tooth 123 intersects with the axial direction of the rotating body 11, preferably the tooth width direction of the poking tooth 123 intersects perpendicularly with the axial direction of the rotating body 11.

Preferably, the extension 122 is provided with an arcuate clearance surface 124, the arcuate clearance surface 124 being oriented in the direction of the first hemisphere 30 and the second hemisphere 40 to avoid interference.

As shown in fig. 1 to 3, the first hemisphere 30 and the second hemisphere 40 are fixedly connected with the transmission shaft 20, respectively. Alternatively, the first hemisphere 30 and the second hemisphere 40 are fixedly connected with the transmission shaft 20 by welding, respectively, so that the two are fixed into a unitary structure. Optionally, the first hemisphere 30 and the second hemisphere 40 are respectively connected with the transmission shaft 20 in an interference fit manner, so that the first hemisphere and the second hemisphere are combined into a whole, and thermal processing deformation is avoided. The first hemisphere 30 and the second hemisphere 40 are provided with a through interference hole 32, and the central line of the interference hole 32 is intersected with the sphere center of the first spherical curved surface 31. The transmission shaft 20 is arranged into a step shaft structure, the first hemispheroid 30 and the second hemispheroid 40 are sleeved on the transmission shaft 20, and the hole wall of the interference hole 32 is in interference fit with the transmission shaft 20 so as to construct matched and fixed connection of the two.

In an alternative embodiment, the transmission shaft 20 includes a first shaft body 21, a second shaft body 22, and a mounting portion 23 sequentially distributed in an axial direction, the shaft diameter of the mounting portion 23 is larger than that of the first shaft body 21, and the speed bearing 50 is fitted to the mounting portion 23. The first shaft body 21 has a smaller shaft diameter than the mounting portion 23, and the first shaft body 21 and the second shaft body 22 have the same size. Preferably, the first shaft body 21 and the second shaft body 22 are symmetrically disposed.

The first hemisphere 30 is in interference fit connection with the first shaft body 21 and the second hemisphere 40 is in interference fit connection with the second shaft body 22. The first hemisphere 30 is interference fit with the first shaft body 21 through the interference hole 32, and the second hemisphere 40 is interference fit with the second shaft body 22 through the interference hole 32. Alternatively, the first shaft body 21 and the second shaft body 22 are configured as an optical axis structure.

In a preferred embodiment, the outer peripheral walls of the first shaft body 21 and the second shaft body 22 are each provided with a plurality of deformation grooves 211, and the deformation grooves 211 intersect with the axis of the transmission shaft 20 in parallel or spirally. The deformation grooves 211 are shallow grooves distributed around the outer peripheral walls of the first shaft body 21 and the second shaft body 22, and alternatively, the deformation grooves 211 are configured as triangular grooves or trapezoidal grooves. The first hemisphere 30 is sleeved through the first shaft body 21 and is in interference fit with the first shaft body 21, and the first hemisphere 30 and the deformation groove 211 are at least partially meshed with each other to be in interference fit, so that the first hemisphere 30 can be prevented from rotating relative to the first shaft body 21, and the first hemisphere 30 can be prevented from moving relative to the first shaft body 21 in the axial direction, and the assembly positioning effect is good. Preferably, the interference hole 32 is configured as a stepped hole, wherein the small hole portion is interference fitted with the first shaft body 21 and the large hole portion is insertion fitted with the mounting portion 23. Based on the same principle, the assembly relationship of the second shaft body 22 with respect to the second hemisphere 40 is similar and can be understood with reference.

The first hemisphere 30, the rotating body 11 and the second hemisphere 40 constitute an approximately spherical structure, wherein the first hemisphere 30 and the second hemisphere 40 have a hemispherical structure, and the outer circumferential wall of the rotating body 11 is provided as a sphere or a cylinder. Alternatively, the spherical diameter of the rotating body 11 is equal to the spherical diameter of the second hemisphere 40. In an alternative embodiment, the sphere diameter of the first hemisphere 30 is larger than the maximum outer diameter of the rotating body 11, and the maximum cross-sectional radius of the first hemisphere 30 is larger than the maximum outer diameter of the rotating body 11, so that there is a drop between the first hemisphere 30 and the outer peripheral wall of the rotating body 11, and the rotation of the governor ring 10 is flexible and avoids interference with the first hemisphere 30 and the second hemisphere 40.

As shown in fig. 1, 5 and 6, the speed dome assembly disclosed in the above embodiment is applied to a continuously variable transmission 60 of a bicycle, wherein the continuously variable transmission 60 includes a freewheel mechanism 61, a speed change mechanism 62 and a rolling assembly, and the speed change mechanism 62 includes a plurality of speed dome assemblies as disclosed in the above embodiment. The rolling assembly enables the rotation of the components.

Other embodiments of the utility model will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This utility model is intended to cover any variations, uses, or adaptations of the utility model following, in general, the principles of the utility model and including such departures from the present disclosure as come within known or customary practice within the art to which the utility model pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the utility model being indicated by the following claims.

It is to be understood that the utility model is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the utility model is limited only by the appended claims.

Claims

1. A speed dome assembly, comprising:

a transmission shaft;

2. The speed ball assembly of claim 1 wherein the speed bearing comprises a first bearing and a second bearing mounted to the drive shaft, an outer race of the first bearing connecting one side of the speed ring and extending into the first hemisphere, and an outer race of the second bearing connecting the other side of the speed ring and extending into the second hemisphere.

3. The speed dome assembly of claim 2, wherein the speed dome ring comprises an annular rotating body, a first rotating shaft and a second rotating shaft partially protruding from an outer peripheral wall of the rotating body, the first rotating shaft and the second rotating shaft being coaxially disposed, the setting teeth protruding from the rotating body and being located between the first rotating shaft and the second rotating shaft, the rotating body being formed with bearing holes, and the first bearing and the second bearing being respectively fitted to the rotating body from both ends of the bearing holes.

4. A speed ball assembly according to claim 3, wherein the speed ring includes a locating shoulder formed by partially projecting from a bore wall of the bearing bore, the first and second bearings respectively abutting the locating shoulder.

5. The speed dome assembly of claim 3, wherein the set-up teeth comprise a set-up boss, an extension portion, and a plurality of set-up teeth spaced apart from the extension portion, the set-up boss protruding radially from the rotating body, and two ends of the extension portion protruding from the set-up boss in the first hemispherical direction and the second hemispherical direction, respectively.

6. The speed dome assembly of claim 1 wherein the first hemisphere and the second hemisphere are each in interference fit connection with the drive shaft.

7. The speed bump assembly according to claim 6 wherein the drive shaft comprises a first shaft body, a mounting portion and a second shaft body which are distributed in sequence along an axial direction, the shaft diameter of the mounting portion is larger than that of the first shaft body, the speed bump bearing is assembled on the mounting portion, the first hemisphere is in interference fit connection with the first shaft body, and the second hemisphere is in interference fit connection with the second shaft body.

8. The speed dome assembly of claim 7 wherein the peripheral walls of the first and second shaft bodies are each provided with a plurality of deformation grooves that are parallel or helically intersected with the axis of the drive shaft.

9. A speed dome assembly in accordance with claim 3 wherein the sphere diameter of the first hemisphere is greater than the maximum outer diameter of the rotating body.

10. A continuously variable transmission comprising a flywheel mechanism, a variator and a rolling assembly, the variator comprising a plurality of speed ball assemblies as claimed in any one of claims 1 to 9.