CN117401075A - A pedal crank length virtual retractable device and bicycle - Google Patents
A pedal crank length virtual retractable device and bicycle Download PDFInfo
- Publication number
- CN117401075A CN117401075A CN202311591022.5A CN202311591022A CN117401075A CN 117401075 A CN117401075 A CN 117401075A CN 202311591022 A CN202311591022 A CN 202311591022A CN 117401075 A CN117401075 A CN 117401075A
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- Prior art keywords
- crank
- wheel
- pedal
- main
- main crank
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Classifications
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- 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
- B62M3/00—Construction of cranks operated by hand or foot
- B62M3/02—Construction of cranks operated by hand or foot of adjustable length
-
- 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
- B62M3/00—Construction of cranks operated by hand or foot
- B62M3/06—Construction of cranks operated by hand or foot with elliptical or other non-circular rotary movement
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Motorcycle And Bicycle Frame (AREA)
Abstract
The utility model relates to a virtual telescopic device of pedal crank length and bicycle, wherein the virtual telescopic device of pedal crank length includes the fixed wheel and the winding wheel that the diameter is the same, the drive belt has been twined between fixed wheel and the winding wheel; the winding wheel is fixedly sleeved on a winding wheel rotating shaft, the winding wheel rotating shaft is fixedly connected with a pedal auxiliary crank which is horizontally arranged, and a main crank is arranged between the fixed wheel and the winding wheel; the fixed wheel is sleeved on the main crank rotating shaft and is fixedly connected with a frame of the bicycle, and a bearing is arranged between the main crank rotating shaft and the fixed wheel and is used for enabling the pedal auxiliary crank to drive the winding wheel, the winding wheel rotating shaft and the main crank to rotate on a circular track taking the main crank rotating shaft as a reference. The invention can increase the length of the pedal crank for effective work by adding an auxiliary crank under the condition of not lengthening the physical length of the main crank, thereby generating a virtual telescopic effect in the movement process.
Description
Technical Field
The application relates to the technical field of manually driven bicycles, in particular to a pedal crank length virtual telescopic device and a bicycle.
Background
In the field of manually driven bicycles, the length of the pedal crank is determined according to the ergonomic principle and the structural parameters of the bicycle, and the length of the pedal crank is unchanged after the determination of the parameters of a certain type of bicycle. It is known from theory mechanics that when the riding resistance is constant, the longer the length of the pedal crank, the smaller the required driving force, which is also the ideal result that people pursue, but the length of the pedal crank must be controlled within a certain range due to the structure of the bicycle and the height of the pedal from the ground.
Disclosure of Invention
The utility model provides a virtual telescoping device of pedal crank length and bicycle to solve above-mentioned pedal crank length and must control the technical problem in certain scope, under the condition of not lengthening pedal crank entity length, make pedal crank length produce a virtual telescopic effect in the motion process through structural design.
In order to achieve the above object, in a first aspect, the present invention provides a virtual telescopic device for a pedal crank length, which comprises a fixed wheel and a winding wheel with the same diameter, wherein a driving belt is coiled between the fixed wheel and the winding wheel;
the winding wheel is fixedly sleeved on a winding wheel rotating shaft, the winding wheel rotating shaft is fixedly connected with a pedal auxiliary crank which is horizontally arranged, and a main crank is arranged between the fixed wheel and the winding wheel;
the fixed wheel is sleeved on the main crank rotating shaft and is fixedly connected with a frame of the bicycle, and a bearing is arranged between the main crank rotating shaft and the fixed wheel and is used for enabling the pedal auxiliary crank to drive the winding wheel, the winding wheel rotating shaft and the main crank to rotate on a circular track taking the main crank rotating shaft as a reference.
In an alternative embodiment, the fixed wheel and the winding wheel are both sprockets or synchronous pulleys, and the driving belt is a chain or synchronous belt.
In an alternative embodiment, the main crank and the pedal auxiliary crank comprise two sets, and the main crank rotating shaft is used as a connecting body and arranged at two sides of the frame.
In an alternative embodiment, the winding wheel is rigidly connected to the winding wheel shaft, and the end of the winding wheel shaft is rigidly connected to the pedal auxiliary crank.
In an alternative embodiment, one end of the pedal auxiliary crank is connected with a pedal, the other end of the pedal auxiliary crank is rigidly connected with the rotating shaft of the winding wheel, and the rotation center of the pedal is not located on the rotation center of the rotating shaft of the winding wheel.
In an alternative embodiment, the winding wheel rotating shaft is arranged at the outer end of the main crank, and the winding wheel rotating shaft can be in rolling fit relative to the main crank.
In an alternative embodiment, the driving belt is wound between the fixed wheel and the winding wheel in a closed loop manner, and the part wound on the winding wheel can drive the winding wheel to rotate relative to the main crank, and the part wound on the fixed wheel climbs along the outer edge of the fixed wheel.
In an alternative embodiment, the main crank comprises a connecting end, the connecting end is provided with a mounting hole, and the main crank is rigidly connected to the main crank rotating shaft through the mounting hole.
In an alternative embodiment, the main crank shaft extends from two sides of the frame for connection and installation of the main crank at two sides, the inner hoop of the bearing is on the outer circle of the main crank shaft, and the inner hoop of the fixed wheel is on the outer circle of the bearing.
In a second aspect, the present invention provides a bicycle comprising the virtual telescopic device for pedal crank length and a wheel according to any one of the foregoing embodiments, wherein the main crank shaft and the fixed wheel are mounted at the center of the wheel, the main crank is disposed in the radial direction of the wheel, and the pedal auxiliary crank is horizontally connected to an end of the main crank.
According to the virtual telescopic device for the length of the pedal crank, the pedal auxiliary crank which is horizontally arranged is wound to drive the winding wheel, the rotating shaft of the winding wheel and the main crank to rotate on the circular track taking the rotating shaft of the main crank as a reference, so that the length of the pedal crank can be virtually prolonged, the virtual length is equal to that of an effective acting area, the length of the solid pedal crank is prolonged, the pedal rotation diameter and the pedal height from the ground are completely consistent with those of the solid pedal crank, and the pedal driving mode of a rider is completely the same as that of a traditional bicycle, so that the rider can feel more relaxed and labor-saving.
Additional features and advantages of the present application will be set forth in the detailed description which follows.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a virtual telescoping device for pedal crank length according to the present application;
FIG. 2 is a schematic view of the pedal crank of the present application in different operating positions;
FIG. 3 is a schematic diagram of the course of action of the virtual telescoping device of pedal crank length of the present application;
fig. 4 is a schematic diagram of an application structure in which chain transmission is omitted.
Icon:
1-pedal; 2-a pedal auxiliary crank; 3-bearing; 4-a main crank shaft; 5-winding the wheel rotating shaft; 6-winding wheels; 7-a main crank; 8-a transmission belt; 9-fixing wheels; 10-a main crank assembly; 11-physical axis of rotation; 12-left crank; 13-right crank; 14-wheels; 15-direct drive stepless speed change device.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It will be apparent that the embodiments described are some, but not all, of the embodiments of the present application. The components of the embodiments of the present application, which are generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
In the description of the present application, it should be noted that, the azimuth or positional relationship indicated by the terms "inner", "outer", etc. are based on the azimuth or positional relationship shown in the drawings, or the azimuth or positional relationship that is commonly put when the product of the application is used, are merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and therefore should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
In the description of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.
The utility model provides a virtual telescoping device of pedal crank length, the specific application is on the bicycle of manpower drive to reduce the driving force of riding the person and be main purpose, realize the virtual scalable effect of pedal crank length through drive mechanism's synthetic motion, thereby reduce the pedal driving force of riding the person, make the process of riding more light laborsaving.
The utility model provides a virtual telescopic device of pedal crank length, be the innovation in the applied function that carries out according to the mechanical transmission principle, in the transmission, when two identical rim plates of diameter adopt the drive disk reel of no slip to wind the connection, with one of them rim plate fixed, when another rim plate only around fixed rim plate rotation and do not autorotation motion by oneself, because around the wheel dish and do not autorotation motion, if a shaft-like object of horizontal arrangement is linked on the perpendicular round wheel dish center pin of winding, then at the in-process shaft-like object of gyration around fixed rim plate all the time be in the horizontality, make the virtual telescopic shaft-like object of shaft-like object in the in-process of gyration around fixed rim plate dynamically for the length of fixed rim plate axle center through this transmission principle, in order to reduce pedal driving force.
Referring to fig. 1, in combination with the above mechanical transmission principle, the main structure of the pedal crank length virtual telescopic device comprises a fixed wheel 9 and a winding wheel 6 with the same diameter, wherein the fixed wheel 9 is used as a fixed wheel disc, the winding wheel 6 is used as a winding wheel disc rotating around the fixed wheel 9, and the transmission connection of the fixed wheel 9 and the winding wheel 6 is realized through a transmission belt 8 coiled between the fixed wheel 9 and the winding wheel 6.
The winding wheel 6 is fixedly sleeved on the winding wheel rotating shaft 5, the winding wheel rotating shaft 5 is fixedly connected with a pedal auxiliary crank 2 which is horizontally arranged, the pedal auxiliary crank 2 is kept in a horizontal state in different movement processes, and further, the winding wheel 6 and the pedal auxiliary crank 2 which is horizontally arranged are rigidly connected with the winding wheel rotating shaft 5, so that the pedal auxiliary crank 2, the winding wheel 6 and the winding wheel rotating shaft 5 are rigidly combined into an integral winding assembly.
A main crank 7 is arranged between the fixed wheel 9 and the winding wheel 6, and the winding assembly drives the main crank 7 to synchronously rotate in the rotating process through the main crank 7 so as to transmit torque in the rotating process.
The fixed wheel 9 is sleeved on the main crank rotating shaft 4 and is rigidly connected with the frame of the bicycle, the fixed wheel 9 is used as a fixed wheel disc to be fixed on the frame and is arranged on the main crank rotating shaft 4 of the rotation center, the rotation root of the main crank 7 is rigidly connected on the main crank rotating shaft 4, and a bearing 3 is arranged between the main crank rotating shaft 4 and the fixed wheel 9 and used for enabling the pedal auxiliary crank 2 to drive the winding wheel 6, the winding wheel rotating shaft 5 and the main crank 7 to rotate on a circular track taking the main crank rotating shaft 4 as a reference.
Through the connecting structure, the pedal auxiliary crank 2 can drive the whole winding assembly and the main crank 7 to rotate, and the connecting line O-Fn in figure 2, namely the length of the virtual crank can generate the telescopic effect in the rotating process.
The fixed wheel 9 and the winding wheel 6 in the present application are both sprockets or synchronous pulleys, the driving belt 8 is a chain or synchronous belt, and the structure of the sprockets and the chain in the preferred drawing can reduce the relative sliding of the driving belt 8 between two wheel discs to the greatest extent.
The main crank 7 and the pedal auxiliary crank 2 comprise two sets, preferably, the pedal auxiliary crank 2, the winding wheel 6 and the winding wheel rotating shaft 5 are rigidly combined into an integral winding assembly, the main crank 7, the fixed wheel 9, the driving belt 8, the fixed wheel 9 and the bearing 3 comprise two sets, and two independent structural assemblies are respectively arranged on two sides of the frame.
The two independent structural components are arranged on two sides of the frame by taking the main crank rotating shaft 4 as a connecting piece to form a power input chain which is the same as that of the existing bicycle, so that the two structural components alternately intersect to transmit torque.
From the angle of the winding assembly, the winding wheel 6 is rigidly connected with the winding wheel rotating shaft 5, and the end part of the winding wheel rotating shaft 5 is rigidly connected with the pedal auxiliary crank 2 to form a rigidly connected integral structure.
Specifically, one end of the pedal auxiliary crank 2 is connected with the pedal 1, and the other end is rigidly connected with the winding wheel rotating shaft 5, so that the rotation center of the pedal 1 and the rotation center of the winding wheel rotating shaft 5 are separated by the length of the pedal auxiliary crank 2, and the rotation radiuses of the pedal auxiliary crank and the winding wheel rotating shaft are completely equal.
Based on the gyration that the subassembly can drive the main crank 7 and carry out, around the outer end at main crank 7 is installed around round pivot 5, and around round pivot 5 can roll the cooperation with respect to main crank 7, promptly based on around round 6 and do not take place the rotation, and the gyration that main crank 7 carries out, make around round 6 can passively roll with respect to main crank 7, keep pedal pair crank 2 constantly to keep the setting form of horizontality.
The driving belt 8 is wound between the fixed wheel 9 and the winding wheel 6 in a closed loop, based on the rotation state of the winding wheel 6, part of the driving belt 8 wound on the winding wheel 6 can drive the winding wheel 6 to rotate relative to the main crank 7, and the driving belt 8 wound on the fixed wheel 9 crawls along the outer edge of the fixed wheel 9 in combination with the fixed mounting of the fixed wheel 9, so that the dynamic connection of the driving belt 8 between the fixed wheel 9 and the winding wheel 6 is formed.
The main crank 7 serves as a base member of the device and mainly plays a supporting role, and specifically, the main crank 7 comprises a connecting end located at a frame part, the connecting end is provided with a mounting hole, and the main crank 7 is rigidly connected to the main crank rotating shaft 4 through the mounting hole.
The main crank shaft 4 extends from two sides of the frame for the main crank 7 on two sides to be rigidly connected, meanwhile, in order to ensure that the winding wheel 6 can rotate relative to the main crank shaft 4, the inner circle hoop of the bearing 3 is arranged on the outer circle of the main crank shaft 4, the inner circle hoop of the fixed wheel 9 is arranged on the outer circle of the bearing 3, the rigid connection of the fixed wheel 9 on the frame is ensured through the rolling of the bearing 3, and the main crank shaft 4 and the main crank 7 rotate, and the main crank 7 and other functional components are assembled to form the main crank assembly 10.
From the structural constitution, the virtual telescopic device of pedal crank length in this application mainly includes tight pulley 9 (sprocket or synchronous pulley), around round 6 (sprocket or synchronous pulley), drive belt 8 (chain or synchronous belt), main crank 7, main crank pivot 4, bearing 3, around round pivot 5, pedal pair crank 2, pedal 1 etc. mainly regard main crank 7 as the basis piece assembly together, constitutes the virtual telescopic device of two sets of solitary pedal crank length in this application, and every bicycle is controlled respectively with one set and through main crank pivot 4 rigid connection, adopts the transmission of relative alternating form.
The fixed wheel 9 is sleeved on the main crank rotating shaft 4 and is fixedly and rigidly connected with a proper part of the frame, the winding wheel 6 is rigidly connected with the winding wheel rotating shaft 5, the winding wheel rotating shaft 5 is arranged at the tail end part of the main crank 7, and the winding wheel rotating shaft 5 is in relative rolling fit with the main crank 7.
The driving belt 8 links the outer circle of the fixed wheel 9 with the outer circle of the winding wheel 6, and when in operation, the outer circle of the fixed wheel 9 only performs crawling action, and the other end drives the winding wheel 6 to rotate relative to the main crank 7.
The main crank shaft 4 is used for supporting and mounting two sets of devices in the application on the left side and the right side of the bicycle, and two ends of the main crank shaft are respectively and rigidly connected with main cranks 7 positioned on two sides and are in rolling fit with the inner circles of bearings 3 fixed on the frame and used for supporting the main crank shaft 4.
The winding wheel rotating shaft 5 is rigidly connected with the winding wheel 6, one end of the winding wheel rotating shaft, which extends out, is rigidly connected with the pedal auxiliary crank 2, and the winding wheel rotating shaft, the pedal auxiliary crank 2 and the pedal auxiliary crank form a rigid whole, and the pedal auxiliary crank and the main crank are in rolling fit with the main crank 7 through the outer circle of the shaft diameter of the pedal auxiliary crank and rotate relatively.
Based on the structure in the application and combining the mechanical transmission principle, on the premise of not changing the turning radius of the existing main crank 7, the virtual crank with the telescopic length for effectively transmitting power is generated through the synthetic motion, so that the driving force can be effectively reduced under the condition of certain riding resistance.
The reduction of the driving force depends on the length of the pedal auxiliary crank 2, and the optimal length parameter is obtained by optimally designing the bicycle parameters and lengthening the length of the pedal auxiliary crank 2 as much as possible, so that the ideal force reducing effect can be obtained.
With reference to fig. 2, through the above description of the structure and principle of the present invention, it can be clearly shown that the dashed line segment between O-Fn in the virtual telescopic device for pedal crank length in the present application is the virtual crank pointed by the device, and at the same time, it can be seen that the rotation center of pedal 1 is O 1 The rotation center of the rotating wheel rotating shaft 5 is an O point, the horizontal distance between the two points is the length of the pedal auxiliary crank 2, and the maximum length of the virtual crank is the sum of the lengths of the main crank 7 and the pedal auxiliary crank 2.
With reference to fig. 3, the foot support 1 is positioned around O 1 The virtual crank length at different positions changes continuously during point rotation, and the longest virtual crank length appears in F 5 Point of length L 1 +L 2 At the shortest time at the Fn point, the length is L 1 -L 2 . The pedal 1 is shown in the motion principle in fig. 3 in F 1 —F 9 When the connecting line is left, the driving force is in a working state, when the connecting line is right, the driving force is in a return state, no work is performed, and when the connecting line is in the working state, the virtual crank length is slightly larger than L 1 And L is equal to 1 +L 2 The required driving force is periodically changed from large to small and then from small to large, and the pedal 1 rotates for one circle to form one period, so that dynamic virtual expansion and contraction are realized.
In combination with fig. 4, the application further provides a bicycle, which comprises the virtual telescopic device of the length of the pedal crank and a wheel 14, wherein the main crank rotating shaft 4 and the fixed wheel 9 are arranged at the center of the wheel 14, the main crank 7 is arranged on the radial direction of the wheel, and the pedal auxiliary crank 2 is horizontally connected with the end part of the main crank 7.
In order to enhance the rigidity of the pedal auxiliary crank 2 and the stability of the pedal 1 during rotation, the pedal 1 is arranged at the rotation center O 1 The physical rotating shaft 11, the left crank 12 and the right crank 13 are added, so that the device body is combined with the bicycle more stably.
Through the cooperation of device body and bicycle, can save the chain drive who generally adopts, effectively optimize the transmission effect of bicycle.
Meanwhile, a direct-drive stepless speed change device 15 can be arranged on the axle center of the wheel in a matching way, and the hub and the wheel 14 are directly driven to rotate through a coil spring and a transmission assembly in the direct-drive stepless speed change device 15, so that a bicycle with speed change and labor-saving driving functions is formed, and an ideal riding condition is realized.
The virtual telescopic device for the length of the pedal crank and the bicycle are simple in structure, easy to process and manufacture and controllable in cost, can be applied to bicycle types with different using purposes and purposes, and can greatly meet the demands of different groups when being applied to the bicycle. The bicycle is suitable for various bicycles driven by manpower, is especially suitable for riding under the situations of weak physical strength, long-distance travel, road surface with a certain gradient and the like, and has ideal labor-saving effect.
It should be noted that, without conflict, features in the embodiments of the present application may be combined with each other.
The foregoing is merely a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and variations may be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311591022.5A CN117401075A (en) | 2023-11-27 | 2023-11-27 | A pedal crank length virtual retractable device and bicycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311591022.5A CN117401075A (en) | 2023-11-27 | 2023-11-27 | A pedal crank length virtual retractable device and bicycle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117401075A true CN117401075A (en) | 2024-01-16 |
Family
ID=89487240
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311591022.5A Pending CN117401075A (en) | 2023-11-27 | 2023-11-27 | A pedal crank length virtual retractable device and bicycle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117401075A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1074273A (en) * | 1992-01-10 | 1993-07-14 | 藤川浩司 | Revolving power mechanism with horizontal arm |
| JPH1035573A (en) * | 1996-07-25 | 1998-02-10 | Shuhei Takasu | Crank mechanism of bicycle or the like |
| CN203032867U (en) * | 2013-01-31 | 2013-07-03 | 杨建军 | Labor-saving bicycle |
| CN203332328U (en) * | 2013-05-27 | 2013-12-11 | 贺亮 | Double-wheel balance pedal stick torque changing type bicycle laborsaving apparatus |
| CN105172983A (en) * | 2015-10-14 | 2015-12-23 | 孙德明 | Novel driving device |
| JP2017206218A (en) * | 2016-05-16 | 2017-11-24 | 渚 田中 | Bicycle straight pedaling crank |
-
2023
- 2023-11-27 CN CN202311591022.5A patent/CN117401075A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1074273A (en) * | 1992-01-10 | 1993-07-14 | 藤川浩司 | Revolving power mechanism with horizontal arm |
| JPH1035573A (en) * | 1996-07-25 | 1998-02-10 | Shuhei Takasu | Crank mechanism of bicycle or the like |
| CN203032867U (en) * | 2013-01-31 | 2013-07-03 | 杨建军 | Labor-saving bicycle |
| CN203332328U (en) * | 2013-05-27 | 2013-12-11 | 贺亮 | Double-wheel balance pedal stick torque changing type bicycle laborsaving apparatus |
| CN105172983A (en) * | 2015-10-14 | 2015-12-23 | 孙德明 | Novel driving device |
| JP2017206218A (en) * | 2016-05-16 | 2017-11-24 | 渚 田中 | Bicycle straight pedaling crank |
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