TWM584770U - Arc-swinging pedaling structure for bicycles - Google Patents

Abstract

An arc swing type pedaling structure of a bicycle is mainly composed of a frame, a driving gear disc, a driving disc and two driving crank sets. The driving disc is used for pivoting on a shaft seat of the frame, and drives the gear disc and transmission. The disks are connected and can rotate synchronously with the transmission disk, and the two transmission crank sets are arranged opposite to each other on the two opposite sides of the transmission disk. Each transmission crank set has a pedal, a first link and a first A link mechanism composed of two links, the pedal lever is pivoted at one end of a pivot joint seat of the frame, and is connected to the second link through the first link, and is eccentrically pivoted to the second link On the transmission disc, the pedal lever can be pivoted as a shaft to perform an arc-shaped motion trajectory, and the first link and the second link of the two transmission crank sets are mutually restrained to drive, so as to drive the gear plate. A circular motion.

Description

Arc swing type stepping structure of bicycle

This creation is related to the pedaling structure of a bicycle, especially an arc swing type pedaling structure of a bicycle.

According to the press, bicycles (or bicycles) are very popular today's mobility tools, and in addition to not using energy and polluting the environment, the use of bicycles can also achieve physical and mental effects, so they are deeply loved by many people.

The conventional bicycle transmission structure mainly has a fixed-length crank, and the pedal is connected to the center of a driving gear (i.e., the driving shaft center) by the crank. By stepping on the pedal, the crank can drive the driving gear to perform a 360 ° circular motion with the length of the crank as the radius can further drive the chain connected with the driving gear, so that the chain can drive the wheel body of the bicycle to achieve the purpose of driving the bicycle forward. However, in this conventional bicycle transmission structure, when the crank is turned to the highest position (that is, 0∘) and the lowest position (that is, 180∘), the direction of the pedal force and the crank and the transmission axis will form a vertical line. When the effective arm length is zero, it cannot provide effective turning power. When the rider steps on the highest position, his leg must output a large pedaling force and slightly change the angle of the pedal. The crank can pass smoothly, so the conventional bicycle transmission structure cannot achieve the labor-saving effect, and is actually a labor-intensive stepping structure that easily causes the user to fatigue.

It cannot extend the crank to increase the length of the arm when the pedal is turned to the place where force is needed, so it cannot achieve the labor-saving effect. It is a stepping device that is laborious and easily causes user fatigue.

In view of this, how to solve the above problems is the most important issue to be solved by the author.

One of the purposes of this creative work is to provide an arc swing-type pedaling structure of a bicycle, which uses a link mechanism and eccentric driving to effectively extend the transmission arm of the pedal lever, so that it has high-efficiency transmission and labor-saving pedaling effect. .

The second purpose of the present invention is to provide an arc swing type stepping structure of a bicycle, which can generate an arc-shaped reciprocating motion trajectory of the pedal, and transform it into a circular motion through a link mechanism to drive the bicycle forward, and can provide riding Effect of different exercise types.

The third purpose of the present invention is to provide an arc swing type pedaling structure of a bicycle, which has the effect of being directly applicable to an existing bicycle without changing its gear shifting module.

In order to achieve the aforementioned purpose, the present invention provides an arc swing type stepping structure of a bicycle, including:
An arc swing type stepping structure of a bicycle includes a frame, a driving gear, a driving disc, and two driving crank sets. The driving disc is used for pivoting on a shaft seat of the frame, and the driving gear and The transmission discs are connected and can rotate synchronously with the transmission discs, and the two transmission crank sets are arranged oppositely on two opposite sides of the transmission discs, of which:
The two transmission crank sets each include a pedal, a first link and a second link. The pedal is pivoted at one end to a pivot seat of the frame, and the other end of the pedal is There is a pedal, and the first link is connected between the two ends of the pedal with one end thereof, and has an included angle with the pedal, and a stopper mechanism is provided between the first link and the pedal. And the pivoting range between the first link and the pedal lever is restricted by the stopper mechanism, and the second link is eccentrically pivoted on the transmission disc at one end, and the other end of the second link is pivoted It is located on the other end of the first link that is relatively far away from the pedal, and when the pedal of one of the transmission crank sets is stepped on, the pedal can use the pivot joint as an axis to move the pedal to produce an arc-like shape. The trajectory of the movement, and by repeatedly stepping on the pedals of the two transmission crank sets, the first link and the second link of the two transmission crank sets can be respectively driven to drive each other to drive the driving gear to perform a circular motion.

Preferably, a shaft capable of pivoting relative to the shaft seat is provided in the shaft seat, and two ends of the shaft are respectively protruded from the shaft seat, and the transmission plate is fixed on one of the two ends of the shaft. The first plate body and a second plate body are composed.

Furthermore, the first plate body and the second plate body are respectively formed with an assembly portion that is offset from the center thereof, and the first plate body and the second plate body have an angle difference of 180 ° from each other. The two connecting rods of the two transmission crank sets are respectively pivoted at one end of the first plate body and the second plate body, and each of the set portions is respectively formed by the first plate The body and the second disc body are formed on the peripheral edge of the outer ring to form a pivot hole with an internal bearing.

Preferably, the pedal lever has a first central wheelbase, the first link has a second central wheelbase, and the second link has a third central wheelbase, and the first central wheelbase is greater than Or equal to the third central wheelbase, and the second central wheelbase is smaller than the first central wheelbase and the third central wheelbase, respectively.

Preferably, the stopper mechanism is formed by a recessed cavity formed on the tread rod to relatively lock the first link to the first link, the volume chamber has a stop surface, and the stop surface can be formed on the stop surface. When the treadle is downwardly displaced, the first link is relatively pressed against the first link, and an elastic body is accommodated on the opposite side of the stop surface, and the first link is convexly provided with a convex post at a relative position corresponding to the accommodation chamber. And the first connecting rod is correspondingly locked between the blocking surface and the elastic body in the accommodating chamber with its convex post.

Preferably, the limiting mechanism may be formed by a torsion spring or a limiting bearing.

And the above-mentioned purpose and advantages of this creation can be easily understood from the detailed description and accompanying drawings of the selected embodiments below.

First, please refer to FIGS. 1 to 5, which is a first embodiment of an arc swing type pedal structure of a bicycle provided by the author, which is mainly composed of a frame 11, a transmission disc 21, and a driving gear 31. And a two-drive crank set 41, of which:

The frame 11 is connected by a plurality of pipe parts, and has a shaft seat 12 and a pivot joint 13 on the frame 11 to form two fulcrum respectively. In this embodiment, it is tied to the bottom of the frame 11 The shaft seat 12 is provided at a position, and a rotation shaft 14 pivotable relative to the shaft seat 12 is penetrated in the shaft seat 12, and both ends of the rotation shaft 14 protrude from the shaft seat 12 and are located on the frame, respectively. The two opposite sides of 11, and in this embodiment, the pivot joint 13 is located on a pipe behind the cushion and is positioned obliquely above the shaft seat 12, but this creation is not limited to this. Of course, different positions can be selected according to the shape of the frame 11 and the relative assembly relationship with the two crank sets 41.

The transmission plate 21 is composed of a first plate body 22 and a second plate body 23 provided on both ends of the rotating shaft 14. The first plate body 22 and the second plate body 23 are respectively provided at the center. Sleeve holes 221 and 231, and the first plate body 22 and the second plate body 23 are respectively set on the two ends of the rotating shaft 14 with the sleeve plate holes 221 and 231, respectively, and then locked by a nut 211 At both ends of the rotating shaft 14, the transmission plate 21 can be rotated synchronously with the rotating shaft 14, and a set portion 24 is formed on the first plate body 22 and the second plate body 23 respectively away from the center thereof. , 25, and the assembly portions 24, 25 of the first plate body 22 and the second plate body 23 are arranged in an opposite direction with an angle difference of 180 °. In this embodiment, each of the set portions 24 and 25 is formed by a pivot hole with a bearing 26 protruding from the peripheral edge of the corresponding outer ring of the disk body.

A plurality of tooth portions 32 for driving a chain 33 are formed on an outer periphery of the driving toothed plate 31, and the driving toothed plate 31 is relatively fixedly connected to the first plate body 22 toward the shaft seat 12 through a plurality of locking members 34. It is arranged on the same axis as the first plate body 22 of the transmission plate 21 on one side, and can rotate synchronously with the transmission plate 21. Of course, the chain 33 can also be replaced by a belt or other transmission belt body.

The two transmission crank sets 41 are disposed opposite each other on the first disk body 22 and the second disk body 23 of the transmission disk 21, and the two transmission crank groups 41 include a pedal 42, a first link 43 and A second link 44 has a first central wheelbase L1, the first link 43 has a second central wheelbase L2, and the second link 44 has a third central wheelbase L3 And the first central wheelbase L1 is greater than or equal to the third central wheelbase L3, and the second central wheelbase L2 is smaller than the first central wheelbase L1 and the third central wheelbase L3, respectively, because the two The configuration of the transmission crank set 41 is only a difference in the opposite configuration, so the following only describes the assembly structure of one of the transmission crank sets 41 connected to the first disc body 22.

The pedal lever 42 is pivoted on one end of the pedal lever 13 on one side of the pivot base 13 of the frame 11, and a bearing 421 is provided in an end of the pedal lever 42 that is in contact with the pivot base 13. The other end is pivotally provided with a pedal 45, and one end of the first link 43 is connected between two ends of the pedal lever 42 and is inclined with the pedal lever 42 to have an included angle θ, Preferably, the first link 43 is inclined toward the pedal, so that the included angle θ is less than 90 °, and a stopper mechanism 46 is further provided between the first link 43 and the pedal 42, and The stopper mechanism 46 limits the pivoting width between the first link 43 and the pedal 42 to avoid the occurrence of motion dead points during transmission. The stopper mechanism 46 can be provided on the pedal 42 and is available for The first connecting rod 43 is configured to be relatively locked, or the first connecting rod is connected to the first connecting rod by a torsion spring, a limit bearing and the like due to the attachment of the pedal 42 to the first connecting rod 43. 43 and the pedal lever 42 so that it can limit the pivoting amplitude between the first link 43 and the pedal lever 42, that is, it can be used to restrict the first link 43 and the pedal lever 42 from advancing. Defining a slight swing angle. In this embodiment, as shown in FIG. 5 with reference to the accompanying drawings, the restricting mechanism 46 is formed by a recessed cavity formed on the pedal 42 to allow the first link 43 to be relatively locked. The receiving chamber has a stop surface 461 which can be relatively pressed against the first link 43 when the pedal 42 is downwardly displaced, and an elastic rubber is accommodated on the opposite side of the stop surface 461. An elastic body 462 is formed, and the first connecting rod 43 is convexly provided with a protruding post 431 at a relative position corresponding to the receiving chamber, and the first connecting link 43 is locked in the receiving chamber with its protruding post 431 correspondingly. Between the stop surface 461 and the elastic body 462, during the transmission process, the first link 43 can have a function of slightly swinging in a single direction (that is, toward the elastic body), thereby ensuring the The step lever 42 drives the smoothness of the first link 43 during transmission, and effectively avoids the occurrence of motion dead spots during transmission.

The second link 44 is eccentrically pivoted on the assembly portion 24 of the first disc body 22 of the transmission disc 21, and the other end of the second link 44 is pivotally opposed to the first link 43. Away from the other end of the step lever 42, so that the step lever 42 can be connected to the transmission disc 21 through the first link 43 and the second link 44, and thereby when the pedal 45 is stepped on to drive the pedal When the step lever 42 swings, the step lever 42, the first link 43 and the second link 44 can be used for mutual drawing to smoothly drive the transmission plate 21 and the driving gear 31 to rotate synchronously. And it must be explained here that the aforementioned first central axis distance L1 is the linear distance between the positions of the two ends of the pedal 42 and the second central axis distance L2 is the two ends of the first link 43. The linear distance between the positions, and the third central axis distance L3 is the linear distance between the positions of the two ends of the second link 44.

The original composition composed of the above structure is actually used for pedaling through the pedal, as shown in Figs. 4 and 6, when the rider presses down with one foot to step on the driving crank group 41A on one side. When the pedal 45A is at the highest position, the pedal lever 42A can use the pivot joint 13 as an axis to drive the pedal 45 to generate an arc-shaped motion trajectory, and through the pedal lever 42A, the first link 43A and the The second link 44A is used for mutual drawing, that is, the first disc body 22 connected to the second link 44A can drive the shaft seat 12 as the axis and drive the rotating shaft 14 and the driving gear 31 to rotate together. At the same time, the second plate (not shown) on the other side is also driven to rotate synchronously, thereby driving the pedal 42B and the pedal 45B disposed oppositely on the second plate to move along the inertia. The same arc-shaped motion traverses upward; then as shown in FIG. 7, when the lever 42B and the pedal 45B on the second disc body are inertially driven to the highest position of the arc-shaped motion trajectory, ride You can change the other foot and press down on the pedal 45B, so that it is on the second plate 23 The pedal lever 42B can also be used for mutual engagement with its first link 43B and second link 44B, and then drive the driving gear 31 to rotate.

In this way, by stepping on the pedals 45A and 45B of the two transmission crank sets 41A and 41B repeatedly (that is, the legs repeatedly perform an arc-shaped motion trajectory), and through the first link 43A of the two transmission crank sets 41A and 41B , 43B and the second connecting rods 44A and 44B mutually restrain the transmission, which can drive the driving gear 31 to perform a circular motion, and then can drive the chain 33 on the driving gear 31 to drive the driving gear of the rear wheel of the bicycle (Not shown) to drive the bicycle forward.

The creative system constituted by the above structure can have the following advantages:

1. The arc swing type pedaling structure provided by this creation can effectively extend the driving force arm of the pedal 42 by using the linkage of the link mechanism to generate a larger force distance, and by using eccentric driving It can continuously change its transmission angle, making its circular motion less prone to motion dead spots and smoother, which has high efficiency transmission and labor-saving pedaling effect.

2. The arc swing type stepping structure of the bicycle provided by this creation can generate an arc-shaped motion trajectory by using its pedal lever 42 as the axis of the pivot base 13 and convert it into a circular motion to drive by the link mechanism. The bicycle moves forward, so it can provide the rider to perform an arc-shaped reciprocating motion. Compared with the conventional bicycle that can only provide 360∘ of circular pedaling motion, it can have a clear distinction and effectively increase the competitiveness of the product.

3. The arc swing-type stepping structure of the bicycle provided in this creation, the structural design of the bicycle only needs to fix the original gear of the bicycle to the first disk body 22, so it will not affect the gear shifting mold of the bicycle itself. Therefore, it has the function of directly cooperating with the existing bicycle gear shifting module.

However, the disclosure of the above embodiments is only used to explain the creation, not to limit the creation. Therefore, changes in numerical values or replacement of equivalent components should still belong to the scope of the creation.

In summary, when those skilled in the art can be made aware that this creation can indeed achieve the aforementioned purpose, it has already complied with the provisions of the Patent Law, and therefore submitted an application in accordance with the law.

11‧‧‧frame

12‧‧‧ Shaft Seat

13‧‧‧ Pivot Seat

14‧‧‧ shaft

21‧‧‧Drive plate

211‧‧‧nut

22‧‧‧ the first plate

23‧‧‧Second plate

221, 231‧‧‧set of holes

24, 25‧‧‧ Organization Department

26‧‧‧bearing

31‧‧‧Drive gear

32‧‧‧Tooth

33‧‧‧Chain

34‧‧‧Lock

41, 41A, 41B‧‧‧ Transmission crank set

42, 42A, 42B‧‧‧Sticks

421‧‧‧bearing

43, 43A, 43‧‧‧ First connecting rod

431‧‧‧B convex post

44, 44A, 44B‧‧‧ Second Link

45, 45A, 45B‧‧‧ pedal

46‧‧‧Limiting mechanism

461‧‧‧stop surface

462‧‧‧ Elastomer

L1‧‧‧First center wheelbase

L2‧‧‧Second center wheelbase

L3‧‧‧ third center wheelbase

θ‧‧‧ angle

Figure 1 is an exploded view of the creation.
Figure 2 is a three-dimensional schematic view of the creation.
Figure 3 is a schematic diagram of the top-view structure after the creation and assembly.
Figure 4 is a schematic diagram of the planar structure after creation.
Figure 5 is a schematic diagram of the assembly between the pedal and the first link of the creation.
Figure 6 is the state diagram of the creation (1).
Figure 7 is the state diagram of the creation (2).

Claims (7)

An arc swing-type stepping structure of a bicycle includes a frame, a transmission disc, a driving gear disc, and two transmission crank sets. The transmission disc is pivotally mounted on a shaft seat of the frame, and the driving gear disc and The transmission discs are connected and can rotate synchronously with the transmission discs, and the two transmission crank sets are arranged oppositely on two opposite sides of the transmission discs, of which:
The two transmission crank sets each include a pedal, a first link and a second link. The pedal is pivoted at one end to a pivot seat of the frame, and the other end of the pedal is There is a pedal, and the first link is connected between the two ends of the pedal with one end thereof, and has an included angle with the pedal, and a stopper mechanism is provided between the first link and the pedal. And the pivoting range between the first link and the pedal lever is restricted by the stopper mechanism, and the second link is eccentrically pivoted on the transmission disc at one end, and the other end of the second link is pivoted It is located on the other end of the first link that is relatively far away from the pedal, and when the pedal of one of the transmission crank sets is stepped on, the pedal can use the pivot joint as an axis to move the pedal to produce an arc-like shape. The trajectory of the movement, and by repeatedly stepping on the pedals of the two transmission crank sets, the first link and the second link of the two transmission crank sets can be respectively driven to drive each other to drive the driving gear to perform a circular motion. The arc swing-type stepping structure of the bicycle according to claim 1, wherein a shaft which is pivotable relative to the shaft seat is provided in the shaft seat, and both ends of the shaft are respectively protruded from the shaft seat, and the The transmission plate is composed of a first plate body and a second plate body which are fixed on both ends of the rotating shaft. The arc swing type stepping structure of a bicycle according to claim 2, wherein the first plate body and the second plate body are respectively formed with an assembly portion that is offset from the center thereof, and the first plate body and the second plate body The assembly parts of the disc body are arranged in an opposite direction with an angle difference of 180 °, and the second connecting rods of the two transmission crank sets are respectively pivoted at one end to the assembly parts of the first disc body and the second disc body. . The arc swing-type stepping structure of a bicycle according to claim 3, wherein each of the set portions is formed by a pivot hole with an internal bearing formed on the peripheral edge of the outer ring of the first plate body and the second plate body. Make up. The arc swing type stepping structure of a bicycle according to claim 1, wherein the pedal has a first central wheelbase, the first link has a second central wheelbase, and the second link has a first Three center wheelbases, and the first center wheelbase is greater than or equal to the third center wheelbase, and the second center wheelbase is smaller than the first center wheelbase and the third center wheelbase, respectively. The arc swing-type stepping structure of the bicycle according to claim 1, wherein the stopper mechanism is formed by a recessed cavity formed on the pedal rod to relatively lock one of the first connecting rods, the receiving chamber A stop surface is provided, which can be relatively pressed against the first link when the pedal is displaced downward, and an elastic body is accommodated on the opposite side of the stop surface, and the first link is A convex post is protruded corresponding to the relative position of the accommodating chamber, and the first connecting rod is correspondingly locked between the blocking surface in the accommodating chamber and the elastic body with its convex post. The arc swing type stepping structure of the bicycle according to claim 1, wherein the limiting mechanism is composed of a torsion spring or a limit bearing.