CN109941392B - Chainless stepless speed changing bicycle - Google Patents
Chainless stepless speed changing bicycle Download PDFInfo
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- CN109941392B CN109941392B CN201910129669.3A CN201910129669A CN109941392B CN 109941392 B CN109941392 B CN 109941392B CN 201910129669 A CN201910129669 A CN 201910129669A CN 109941392 B CN109941392 B CN 109941392B
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- shaped friction
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Abstract
The invention relates to an improved structure of a bicycle, in particular to a chainless stepless speed change bicycle. A first shaft sleeve of the rear wheel, which can move and transmit rotation, is sleeved on the rear shaft by a spline shaft structure, and a first round table-shaped friction wheel is fixed at the outer extending end; the pedal shaft is connected with a transmission shaft which is consistent with the front and back directions of the bicycle through a pair of bevel gears in a transmission way, the rear end of the transmission shaft is connected with a second truncated cone-shaped friction wheel in a movable and transmission rotating way through a spline shaft structure, the transmission shaft and a first truncated cone-shaped friction wheel transmit power through a partial or whole contact friction area, the transmission shaft is fixed on the bicycle frame through a second shaft sleeve which can rotate mutually through an assembly clamp, a stepless speed regulating knob is arranged on the handlebar, the transmission shaft is connected with a rotating disc through a speed regulating pull wire, and each group of speed regulating clamping pieces respectively clamp the large end surface and the small end surface of the first or second truncated cone. The adoption changes round platform shape friction wheel laminating point linear velocity and carries out stepless speed control, improves drive efficiency, and increase adjustable range and continuity have improved the experience of riding and have felt, the reinforcing enjoyment of riding.
Description
Technical Field
The invention relates to an improved structure of a bicycle, in particular to a chainless stepless speed change bicycle structure.
Background
The current bicycle transmission design mainly consists of a chain transmission, and the common bicycle transmission consists of pedals, a chain and chain wheels. Wherein the chain can appear the wearing and tearing of chain, the ageing problem of rustting at the in-process that uses, and these problems have caused the chain to easily drop even fracture from the sprocket, lead to the unable normal riding of bicycle.
Aiming at the speed change problem of bicycles, the existing speed change bicycles all adopt a step speed change mechanism consisting of a plurality of large and small chain wheel assemblies at the front and the back and a gear shifter. When the step speed change mechanism is used for adjusting the speed, a first-level and a second-level rotating gear shifter are needed so as to reach a certain fixed speed gear, and the user can not adjust the riding speed randomly. And the step-variable transmission has the advantages of complicated structure, high cost and high failure rate.
Therefore, there is a need in the market to provide a bicycle with a simple speed changing function without a chain, which reduces the number of failures.
Disclosure of Invention
The invention solves the problems that: the existing chain type transmission and step speed change modes of the bicycle are changed, and a bicycle structure of a chainless stepless speed change mode is realized.
The purpose of the invention is realized by the following technical scheme:
a chainless continuously variable bicycle is characterized in that:
a first movable rear wheel shaft sleeve is sleeved on a rear shaft of the bicycle through a spline shaft structure, and a first truncated cone-shaped friction wheel with a small end facing outwards is fixed at the outer extending end of the first shaft sleeve;
the pedal shaft is in transmission connection with a transmission shaft which is consistent with the front and back directions of the bicycle through a pair of bevel gears, the rear end of the transmission shaft is connected with a second truncated cone-shaped friction wheel with a backward small end by a spline shaft structure in a movable and transmission rotating mode, the transmission shaft and the first truncated cone-shaped friction wheel transmit power in a partial or whole contact friction area, the transmission shaft is fixed on the bicycle frame by an assembly clamp through a second shaft sleeve which can rotate mutually, and the transmission shaft is fixed on the bicycle frame by an enhancement clamp at the end, close to the second truncated cone-shaped friction wheel, of the second shaft sleeve;
the two friction wheel shafts of the first truncated cone-shaped friction wheel and the second truncated cone-shaped friction wheel are mutually vertical and are positioned on a horizontal plane, a rotating disc which is provided with a central shaft and is fixed on the frame and can horizontally rotate is arranged above the horizontal plane in parallel, two groups of speed regulating clamping pieces which are respectively composed of two driving levers extend downwards from the disc surface of the rotating disc, each group of speed regulating clamping pieces respectively clamp the large and small truncated cone end surfaces of the first truncated cone-shaped friction wheel or the second truncated cone-shaped friction wheel, and the vertical lines of the connecting lines of the two driving levers of the two groups are mutually vertical;
a stepless speed regulating knob is arranged on the handlebar and is connected with a rotating disc through a speed regulating pull wire.
By adopting the technical scheme, the pedals are stepped by feet, the pedal shaft is in transmission connection with the transmission shaft which is consistent with the front and back directions of the bicycle through the pair of bevel gears, and the transmission shaft transmits power backwards to drive the bicycle to move forwards.
The first round platform shaped friction wheel can move along the direction of the rear axle of the bicycle in the inner and outer directions; the second truncated cone-shaped friction wheel can move along the axial direction of the transmission shaft consistent with the front and back directions of the bicycle; the first truncated cone-shaped friction wheel and the second truncated cone-shaped friction wheel transmit power in partial or all contact friction areas, and the truncated cones are inclined planes, so that different radiuses for driving rotation are caused along with different contact surfaces and different contact positions, different transmission speeds are generated, and the purpose of speed change is achieved.
The small end of the second truncated cone-shaped friction wheel is in contact with the large end of the first truncated cone-shaped friction wheel, the output speed is minimum, and the large end of the second truncated cone-shaped friction wheel is in contact with the small end of the first truncated cone-shaped friction wheel, so that high-speed rotation of the first truncated cone-shaped friction wheel can be generated, and the rear shaft and the rear wheel of the bicycle are driven to rotate at high speed.
The handle bar is provided with a stepless speed regulation knob, the speed regulation knob is rotated and is connected with the rotating disc through a speed regulation stay wire to rotate, two groups of speed regulation clamping pieces consisting of two shift rods respectively extend downwards from the disc surface of the rotating disc, and each group of speed regulation clamping pieces respectively clamp the large and small circular truncated cone end surfaces of the first circular truncated cone-shaped friction wheel or the second circular truncated cone-shaped friction wheel to force the first circular truncated cone-shaped friction wheel and the second circular truncated cone-shaped friction wheel to change the contact position, so that the speed regulation purpose is achieved.
The transmission shaft is fixed on the frame by the assembly clamp through the second shaft sleeves which can rotate mutually, and the rotating transmission shaft can be fixed on the frame through the second shaft sleeve, so that a complete technical scheme is formed.
The invention provides a fixed restraining force by fixing the reinforcing hoop on the frame at the end of the second shaft sleeve close to the second truncated cone-shaped friction wheel, so that the contact position change of the first truncated cone-shaped friction wheel and the second truncated cone-shaped friction wheel becomes feasible and reliable.
Furthermore, the included angle between the circular truncated cone inclined plane and the bottom plane of the first circular truncated cone-shaped friction wheel and the second circular truncated cone-shaped friction wheel is 45 degrees.
And furthermore, the corundum porcelain is taken as the first cone-shaped friction wheel and the second cone-shaped friction wheel.
Further, the transmission shaft is composed of an inner shaft/outer shaft in the middle and two outer shafts/inner shafts at two ends, or an inner shaft at one end and an outer shaft at one end are mutually sleeved and connected in a spline shaft mode.
Furthermore, springs are respectively arranged on the first shaft sleeve and the transmission shaft, so that the first truncated cone-shaped friction wheel and the second truncated cone-shaped friction wheel keep pre-tightening thrust in the direction of mutual attachment of the two truncated cone surfaces.
Furthermore, a bearing is arranged at the end part of a deflector rod forming the speed regulation clamping piece and clamped on the large and small circular truncated cone end surfaces of the first circular truncated cone-shaped friction wheel or the second circular truncated cone-shaped friction wheel.
Further, the transmission shaft is disposed in the second sleeve via a bearing.
The invention has the beneficial effects that:
1) the original mode of carrying out step speed regulation on the bicycle by a plurality of large and small chain wheel assemblies is changed, the structure is complex, and faults are easy to occur;
2) the mode that the linear speed of the binding points is changed by binding the sliding circular truncated cone-shaped friction wheel is adopted for stepless speed regulation, so that the driving efficiency of the bicycle is greatly improved, the speed adjustable range and the continuity of the speed regulation are increased, the riding experience is improved, and the riding pleasure is enhanced;
3) the transmission of the bicycle is more reliable, the speed change is more humanized, and the requirement of the speed change of the bicycle is better met.
4) The first truncated cone-shaped friction wheel on the rear wheel can move in the inner and outer directions along the direction of the rear axle of the bicycle by adopting the single power of the speed-regulating stay wire; the second truncated cone-shaped friction wheel moves along the axial direction of the transmission shaft which is consistent in the front-back direction of the bicycle, so that the meshing part of the truncated cone-shaped friction wheel is changed, the transmission ratio is adjusted steplessly, the stepless speed change of the bicycle is realized, and the design is ingenious.
5) The transmission shaft is fixed on the frame by a second shaft sleeve which can rotate mutually and an assembly clamp, so that the invention forms a complete technical scheme. The reinforced hoop is fixed on the frame at the end, close to the second truncated cone-shaped friction wheel, of the second shaft sleeve, and provides fixing constraint force, so that the technical scheme of the invention for changing the contact position of the first truncated cone-shaped friction wheel and the second truncated cone-shaped friction wheel becomes feasible and reliable.
Drawings
FIG. 1 is a schematic view of the present invention showing a chainless continuously variable transmission bicycle.
FIG. 2 is an outline view of the transmission system of the chainless continuously variable bicycle of the present invention.
Fig. 3 is an enlarged view of the position of the speed regulating toggle mechanism in fig. 2.
FIG. 4 is a bottom profile view of the transmission system of the present invention.
FIG. 5 is a view of the arrangement of a bicycle drive shaft and mating parts of the present invention, wherein the mounting clip and frame are shown rotated 90 degrees.
FIG. 6 is a schematic view of the bicycle speed governing shift lever of the present invention.
Fig. 7 is a schematic diagram of the chainless stepless speed regulation of the bicycle of the present invention.
FIG. 8 is a schematic view of the extreme minimum gear ratio position of the bicycle shift of the present invention.
FIG. 9 is a schematic view of the extreme maximum gear ratio position during shifting of the bicycle of the present invention.
In the figure, 3, a pedal, 6, a speed regulation pull wire, 8, a first bevel gear, 9, a second bevel gear, 10a, a rotating disc, 10b, a deflector rod, 10c, a central shaft, 10d, a bearing, 11, a transmission shaft, 14, a handlebar, 15, a stepless speed regulation knob, 16, a first shaft sleeve, 17, a second shaft sleeve, 18, a frame, 19, an assembly clamp, 20, a rear shaft, 21, a spring and 22, a reinforced clamp.
Detailed Description
A chainless stepless speed change bicycle,
a first rear wheel shaft sleeve 16 which can move and transmit rotation is sleeved on the rear shaft 20 through a spline shaft structure, and a first truncated cone-shaped friction wheel 8 with a small end facing outwards is fixed at the outer extending end of the first shaft sleeve 16;
a transmission shaft 11 which is consistent with the front and back directions of the bicycle is connected on the pedal shaft in a transmission way through a pair of bevel gears, the rear end of the transmission shaft 11 is connected with a second truncated cone-shaped friction wheel 9 with a backward small end by a spline shaft structure in a movable and transmission rotating way, and the transmission shaft 11 and a first truncated cone-shaped friction wheel 8 transmit power by a partial or whole contact friction area, the transmission shaft 11 is fixed on a frame 18 by a second shaft sleeve 17 which can rotate mutually through an assembly clamp 19, and the second shaft sleeve 17 is fixed on the frame 18 by an enhanced clamp 22 close to the second truncated cone-shaped friction wheel 9;
the two friction wheel shafts of the first truncated cone-shaped friction wheel 8 and the second truncated cone-shaped friction wheel 9 are mutually vertical and positioned on a horizontal plane, a central shaft 10c is parallelly arranged above the horizontal plane and is fixed on a rotating disc 10a which can horizontally rotate on a frame 18, two groups of speed regulating clamping pieces which are respectively composed of two shift levers 10b extend downwards from the disc surface of the rotating disc 10a, each group of speed regulating clamping pieces respectively clamp the large and small truncated cone end surfaces of the first truncated cone-shaped friction wheel 8 or the second truncated cone-shaped friction wheel 9, and the vertical lines of the connecting lines of the two groups of shift levers 10b are mutually vertical;
a stepless speed regulating knob 15 is arranged on a handlebar 14 and is connected with a rotating disc 10a through a speed regulating pull wire 6.
The included angle between the circular truncated cone inclined plane and the bottom plane of the first circular truncated cone-shaped friction wheel 8 and the second circular truncated cone-shaped friction wheel 9 is 45 degrees. Thereby, the 45-degree angle is ensured, so that the axes of the first truncated cone-shaped friction wheel 8 and the second truncated cone-shaped friction wheel 9 can be perpendicular to each other.
The first round platform-shaped friction wheel 8 and the second round platform-shaped friction wheel 9 are made of corundum porcelain. It is a wear-resistant, long-life material with a certain friction.
The transmission shaft 11 is composed of an inner shaft/outer shaft in the middle and two outer shafts/inner shafts at two ends, or an inner shaft at one end and an outer shaft at one end are mutually sleeved and connected in a spline shaft mode. The spline structure of the transmission shaft 11 can be in various forms, can be selected according to the conditions of a processing party, and is favorable for the purposes of convenient processing, high work efficiency and material saving.
Springs 21 are respectively arranged on the first shaft sleeve 16 and the transmission shaft 11, so that the first truncated cone-shaped friction wheel 8 and the second truncated cone-shaped friction wheel 9 maintain pre-tightening thrust in the direction of mutual joint of the two truncated cones. The technical scheme is optimized, so that the fitting and the jointing are more comfortable, the speed change and the transition are more stable, and the riding person is more comfortable.
The end of a deflector rod 10b forming the speed regulation clamping piece is provided with a bearing 10d which is clamped on the large and small circular truncated cone end surfaces of the first circular truncated cone friction wheel 8 or the second circular truncated cone friction wheel 9. After the bearing is added, parts are more wear-resistant, the service life is longer, and the operation and speed change are easier.
The transmission shaft 11 is disposed in the second boss 17 via a bearing. The transmission shaft 11 is a part which continuously rotates, is more wear-resistant and long in service life when arranged in a bearing, and improves riding efficiency.
While the preferred embodiments of the present invention have been described, those skilled in the art will appreciate that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (7)
1. A chainless continuously variable bicycle is characterized in that:
a first rear wheel shaft sleeve (16) which can move and transmit rotation is sleeved on a rear shaft (20) of the bicycle through a spline shaft structure, and a first truncated cone-shaped friction wheel (8) with a small end facing outwards is fixed at the outer extending end of the first rear wheel shaft sleeve (16);
the pedal shaft is connected with a transmission shaft (11) which is consistent with the front and back directions of the bicycle through a pair of bevel gears in a transmission way, the transmission shaft (11) is connected with a second truncated cone-shaped friction wheel (9) with a backward small end in a movable and transmission rotating way through a spline shaft structure, power is transmitted with a partial or whole contact friction area of the first truncated cone-shaped friction wheel (8), the transmission shaft (11) is fixed on the bicycle frame (18) through a second shaft sleeve (17) which can rotate mutually through an assembly clamp (19), and an enhanced clamp (22) is fixed on the bicycle frame (18) at the position, close to the second truncated cone-shaped friction wheel (9), of the second shaft sleeve (17);
the two friction wheel shafts of the first truncated cone-shaped friction wheel (8) and the second truncated cone-shaped friction wheel (9) are mutually vertical and are positioned on a horizontal plane, a central shaft (10c) is arranged above the horizontal plane in parallel and is fixed on a rotating disc (10a) which can horizontally rotate on a frame (18), two groups of speed regulation clamping pieces which are respectively composed of two shift levers (10b) extend downwards from the disc surface of the rotating disc (10a), each group of speed regulation clamping pieces respectively clamp the large and small truncated cone end surfaces of the first truncated cone-shaped friction wheel (8) or the second truncated cone-shaped friction wheel (9), and the vertical lines of the connecting lines of the two groups of shift levers (10b) are mutually vertical;
a stepless speed regulating knob (15) is arranged on a handlebar (14) and is connected with a rotating disc (10a) through a speed regulating pull wire (6).
2. The infinitely variable bicycle according to claim 1, wherein the included angle between the inclined surface and the bottom plane of the first truncated cone-shaped friction wheel (8) and the second truncated cone-shaped friction wheel (9) is 45 degrees.
3. The infinitely variable bicycle according to claim 1 or 2, wherein the first and second frustoconical friction wheels (8, 9) are made of corundum porcelain.
4. The infinitely variable bicycle according to claim 1, wherein the transmission shaft (11) is formed by a middle inner/outer shaft and two outer/inner shafts at two ends, or by an inner shaft at one end and an outer shaft at the other end, which are nested and connected with each other in a spline manner.
5. The continuously variable bicycle according to claim 1, wherein the first hub (16) of the rear wheel and the transmission shaft (11) are respectively provided with a spring (21) so that the first truncated cone shaped friction wheel (8) and the second truncated cone shaped friction wheel (9) maintain a pre-tightening thrust in a direction in which the truncated cones abut against each other.
6. The infinitely variable bicycle according to claim 1, wherein a bearing (10d) is disposed at an end of a shift lever (10b) constituting the speed-adjusting clamp and clamped between the large and small circular truncated cone end surfaces of the first circular truncated cone shaped friction wheel (8) or the second circular truncated cone shaped friction wheel (9).
7. Infinitely variable bicycle according to claim 1, characterized in that the transmission shaft (11) is arranged in the second hub (17) via a bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910129669.3A CN109941392B (en) | 2019-02-21 | 2019-02-21 | Chainless stepless speed changing bicycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910129669.3A CN109941392B (en) | 2019-02-21 | 2019-02-21 | Chainless stepless speed changing bicycle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109941392A CN109941392A (en) | 2019-06-28 |
| CN109941392B true CN109941392B (en) | 2020-06-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910129669.3A Active CN109941392B (en) | 2019-02-21 | 2019-02-21 | Chainless stepless speed changing bicycle |
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| Country | Link |
|---|---|
| CN (1) | CN109941392B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112678111A (en) * | 2021-01-07 | 2021-04-20 | 黄秋荣 | Chainless bicycle transmission system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2208539Y (en) * | 1994-09-09 | 1995-09-27 | 谢恩如 | Stepless speed-change device for bicycle |
| US6102148A (en) * | 1998-10-21 | 2000-08-15 | Chien; Hsi-Hai | Electrically powered bicycle driving mechanism |
| CN2491327Y (en) * | 2001-07-05 | 2002-05-15 | 刘秦勤 | Stageless speed variator of bicycle |
| CN201914399U (en) * | 2010-08-09 | 2011-08-03 | 柴明珠 | Box-type stepless transmission of bicycle |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012136205A (en) * | 2010-12-28 | 2012-07-19 | Suzuki Motor Corp | Motorcycle transmission |
-
2019
- 2019-02-21 CN CN201910129669.3A patent/CN109941392B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2208539Y (en) * | 1994-09-09 | 1995-09-27 | 谢恩如 | Stepless speed-change device for bicycle |
| US6102148A (en) * | 1998-10-21 | 2000-08-15 | Chien; Hsi-Hai | Electrically powered bicycle driving mechanism |
| CN2491327Y (en) * | 2001-07-05 | 2002-05-15 | 刘秦勤 | Stageless speed variator of bicycle |
| CN201914399U (en) * | 2010-08-09 | 2011-08-03 | 柴明珠 | Box-type stepless transmission of bicycle |
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| Publication number | Publication date |
|---|---|
| CN109941392A (en) | 2019-06-28 |
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