TWM460831U - Eccentric shaft, variable-stroke crank structure and variable-stroke crank set - Google Patents

Description

Eccentric shaft, variable crank structure and variable crank group

This creation is about an eccentric shaft, a variable crank structure and a variable crank group, especially a length of the arm that can be adjusted by the design of the eccentric shaft, so that the user can adjust according to his height and leg length. In addition, it can be changed according to different riding conditions, and the most appropriate and ergonomic pedaling method can achieve the effect of pedaling effort and riding comfort.

According to the pedal structure of the bicycle, which is a part of the bicycle transmission mechanism, the crank structure is equipped with a foot pedal, and the crank structure is rotated by the stepping pedal, thereby driving the gear receiving tray and rotating the bicycle wheel. Achieve the function of travel. However, the crank structure is a bicycle transmission mechanism that mainly receives the portion where the pedaling force is applied, and therefore requires a relatively firm joint strength. Therefore, it is generally known that the length of the arm of the bicycle crank is fixed, and the length of the arm of the crank cannot be adjusted.

The adjustment of the length of the crank arm allows the user to change according to the height and leg length, and the knee and the thigh and the calf are at the most suitable angle when stepping on, avoiding knee joint injury; and the adjustment of the length of the crank arm will be determined. The diameter of the circumference generated by the pedaling, the larger the diameter, the more labor-saving, which is conducive to climbing, but the muscles of the knee and thigh must increase the expansion and contraction to step on the crank; and the advantage of the short arm of the crank is that the speed can be increased, but It is more laborious, so the user can adjust according to the conditions or habits of riding.

Regarding the prior art of the variable-turn crank structure, there is a patent case of the "Crank Mechanism" of the Republic of China New Patent Publication No. M434733, which discloses a crank mechanism which can be installed in a double In the foot-moving vehicle, the structure comprises a rod-shaped crank and a rod-shaped connecting rod, and each of the two ends of the crank has a circular hole as a first circular hole and a second circular hole, and each end of the connecting rod has a circle The hole is a third circular hole and a fourth circular hole; the coupling relationship is that the connecting circular shaft is combined with the second circular hole of the crank and the third circular hole of the connecting rod as a rotating shaft, and the first circular hole of the crank is disposed in the city. The five-way mandrel end is combined and the fourth round hole of the connecting rod is combined with the connecting shaft of the commercially available foot pedal; by the above result, the crank mechanism can change the movement path of the foot pedal and shorten the foot The path the pedal moves.

In addition, the Patent Law of the Republic of China New Patent Announcement No. M397350 "Bicycle's Foot Crank Structure" discloses a bicycle pedal structure, especially a multi-stage telescopic adjustment of the pedal crank torque length, which can adjust the pedal in The degree of the pedaling force; the pedal crank structure is mainly assembled in a sleeve of a non-circular guide hole by a non-circular guide rod, and the guide rod is restricted or allowed to be adjusted by a screw body. And the length of the telescopic length between the sleeves; thereby, the length of the torque of the pedal crank can be adjusted in multiple stages.

The lack of the prior art is that the crank structures of the M419733 and M397350 are both combined by a two-stage type, so as to adjust the length of the crank arm, so that the connection between the components is easy to loosen, and the crank structure is a bicycle. In the transmission mechanism, the main part of the transmission force is received. Therefore, the design of the front case M434733 and M397350 is easy to make the crank structure affect the joint portion of the crank structure due to long-term pedaling force, resulting in a lack of stable joint strength; The crank structure of the M397350 is limited or allowed to adjust the telescopic length between the guide rod and the sleeve by a rotary button body, so that it has more components, so it takes more time to assemble.

Therefore, based on the above description, the lack of the crank structure is known, so this author proposes a bias. The heart rotating shaft, the variable crank structure and the variable crank group have the advantages of simple structure, convenient assembly and stable joint strength. Through the design of an eccentric shaft, the length of the crank arm can be adjusted, so that the user can adjust according to his height and leg length, and can also change with different riding conditions to be the most appropriate and most suitable for the human body. The method of stepping on the work has the effect of stepping on effort and riding comfort.

The eccentric shaft of the present invention comprises a fixing member, and a bearing member is disposed on the fixing member in an eccentric state.

The variable crank structure of the present invention comprises: an eccentric rotating shaft, comprising a fixing member, the fixing member is provided with a first engaging portion, and a bearing member is disposed on the fixing member in an eccentric state; a crank, the The crank has a first perforation at one end and a second perforation at the other end, the bearing member of the eccentric shaft passes through the first perforation, and the first engaging portion is engaged with a second card disposed at a circumference of the first perforation The joint has a distance between the bearing member and the second perforation.

The first engaging portion is a plurality of engaging blocks that are disposed on the fixing member, and the second engaging portion is a plurality of engaging grooves corresponding to the peripheral edge of the first through hole.

The present invention further provides a set of a shifting crank comprising: two eccentric rotating shafts, each of the eccentric rotating shafts comprising a fixing member, wherein the fixing member is provided with a first engaging portion, and each of the bearing members is disposed in an eccentric state. a fixing hole is formed on the fixing member, and a fixing hole is formed by the fixing member to the two ends of the bearing member; the two cranks have a first through hole at one end and a second through hole at the other end, and the eccentric rotating shaft The bearing member passes through the first through hole, and the first engaging portion is engaged with a second engaging portion disposed at one of the first perforating circumferences, and between the bearing member and the second through hole a gear receiving tray having a shaft hole, the first perforations of the two cranks respectively corresponding to the shaft holes, the two cranks are on the same extension line, and the second perforations of the two cranks are opposite to the two ends of the extension line; a locking fastener passing through the fixing holes of the two eccentric rotating shafts to lock the crank to the gear receiving tray on.

The first engaging portion is a plurality of engaging blocks that are disposed on the fixing member, and the second engaging portion is a plurality of engaging grooves corresponding to the peripheral edge of the first through hole.

The effect of this creation:

1. This creative department can adjust the length of the crank arm through the design of an eccentric shaft, so that the user can adjust according to his height and leg length, and can also change with different riding conditions. The most ergonomic stepping method achieves the effect of pedaling effort and riding comfort, and the crank of the creation is integrally formed, which is not formed by segmental combination, so it has a firm joint strength, so the connection between components is activated. Not easy to loose.

2. This creation proposes an eccentric shaft, a variable crank structure and a variable crank group, which have the advantages of simple structure, convenient assembly and stable joint strength. The design of the eccentric shaft can adjust the distance between the bearing member and the second perforation. This creation is designed for the basic components to adjust the crank length, so the creation does not need to be different without adding additional components. The length of the crank opens different molds, so the cost of production can be reduced.

3. Since the creation is simple, the length of the crank arm is quite convenient. It is only necessary to adjust the engagement position of the first engaging portion and the second engaging portion by rotating the eccentric rotating shaft. The distance from the bearing member to the second perforation does not require excessive time for adjustment.

(1) ‧ ‧ eccentric shaft

(11)‧‧‧Fixed parts

(111)‧‧‧First engagement department

(12)‧‧‧ Bearing parts

(13) ‧‧‧Fixed holes

(2) ‧‧‧ crank

(21)‧‧‧First perforation

(211)‧‧‧Second engagement department

(22)‧‧‧Second perforation

(3)‧‧‧ Gears

(31)‧‧‧Axis hole

(4)‧‧‧Lock Firmware

(41)‧‧‧ screws

(42)‧‧‧ Nuts

[First figure] is an exploded view of the structure of the preferred embodiment.

[Second figure] is a structural combination diagram of the preferred embodiment.

[Third image] is a structural combination diagram of the eccentric rotating shaft of the preferred embodiment and the crank at 0 degrees.

[Fourth figure] is a schematic view showing the crank length corresponding to the eccentric rotating shaft of the preferred embodiment and the crank at 0 degrees.

[Fifth Figure] is a schematic view of the length of the crank corresponding to the rotation of the eccentric shaft by 60 degrees in the preferred embodiment.

[Sixth Drawing] is a schematic view of the crank length corresponding to the eccentric rotating shaft rotated by 90 degrees in the preferred embodiment.

[Seventh] is a schematic view of the length of the crank corresponding to the rotation of the eccentric shaft by 120 degrees in the preferred embodiment.

[Eighth image] is a schematic view of the length of the crank corresponding to the rotation of the eccentric shaft by 180 degrees in the preferred embodiment.

[Ninth aspect] is a schematic view showing the state of use of the preferred embodiment.

The technical features and enhancements of the present invention can be clearly presented in conjunction with the preferred embodiments of the following figures. First, please refer to the first and second figures. The preferred embodiment of the present invention is a variable range. The crankset includes: a second eccentric shaft (1), the eccentric shaft (1) includes a fixing member (11), and the fixing member (11) is provided with a first engaging portion (111). In the example, the first engaging portion (111) is a twelve engaging block ringed on the fixing member (11), and each bearing member (12) is eccentrically disposed on the fixing member (11). And a fixing hole (13) is formed by the fixing member (11) to the both ends of the bearing member (12); two cranks (2) having a first perforation at one end of the crank (2) (21), the other end has a second through hole (22) through which the bearing member (12) of the eccentric rotating shaft (1) passes a through hole (21), and the first engaging portion (111) is engaged with a second engaging portion (211) disposed at a circumference of the first through hole (21), the second engaging portion ( 211) in the embodiment, there are twelve engaging grooves, and there is a distance between the bearing member (12) and the second through hole (22); a gear receiving plate (3) has an axis a hole (31), the first through hole (21) of the two cranks (2) respectively corresponding to the shaft hole (31), the bearing member (12) of the eccentric rotating shaft (1) passing through the shaft hole (31) and mutual Connecting, the two cranks (2) are on the same extension line, and the second perforations (22) of the two cranks (2) are opposite to the two ends of the extension line; a locking member (4), which in this embodiment is a a screw (41) and a corresponding nut (42), the screw (41) passing through the fixing holes (13) of the two eccentric rotating shafts (1) and the corresponding nuts (42) are screwed to each other, and Locking the crank (2) on the gear receiving disk (3); changing the card of the first engaging portion (111) and the second engaging portion (211) by rotating the eccentric rotating shaft (1) In position, the distance between the bearing member (12) and the second perforation (22) is adjusted.

The preferred embodiment of the present invention adjusts the operation of the distance between the bearing member (12) and the second through hole (22). Please refer to the third and fourth figures, the bearing member (12). The diameter is 10 mm, and d represents the distance from the bearing member (12) to the second through hole (22), and the fixing member (11) has twelve engaging blocks on the upper ring, and The circumference of the first through hole (21) is correspondingly provided with twelve engaging grooves, and the longest distance between the bearing member (12) and the second through hole (22) is defined as 0 degree, and the longest distance is In the embodiment, it is 175 mm. When the aforementioned engaging block rotates by 30 degrees corresponding to the adjacent engaging groove, the rotation of the transmission angle changes the bearing member (12) to the second through hole (22). The distance. Referring to the fifth to eighth figures, respectively, the length of the crank arm corresponding to the rotation of different angles, that is, the distance from the bearing member (12) to the second through hole (22), The length of the crank arm when rotated 60 degrees 172.5 mm; when the rotation is 90 degrees, the length of the crank arm is 170 mm; when the rotation is 120 degrees, the length of the crank arm is 167.5 mm; when the rotation is 180 degrees, the length of the crank arm is 165. PCT. As the aforementioned eccentric shaft (1) is rotated, the bearing member (12) is brought close to the second through hole (22), thereby shortening the distance between the bearing member (12) and the second through hole (22).

The crank (2) of this creation is integrally formed, and is not formed by segmental combination, so it has a firm joint strength, so the connection between the components is not easy to loosen, and the creation is designed for the basic components to achieve adjustment. The length of the crank arm, so without adding additional components, the creation does not need to open different molds according to the crank of different lengths, so the cost of production can be reduced.

Please refer to the ninth figure, which is a schematic view of the use state of the variable crank set assembled to the bicycle according to the preferred embodiment of the present invention. The design can adjust the length of the crank arm through the design of the eccentric shaft (1), so that Users can change with different riding conditions, or adjust according to their height and leg length, and even for riders with long and short legs. Because of the simple assembly of this creation, the crank arm is adjusted. It is very convenient in length, and the bearing member can be adjusted only by rotating the eccentric rotating shaft (1) and changing the engaging position of the first engaging portion (111) and the second engaging portion (211). 12) The distance to the second perforation (22) does not require too much time to adjust, so that most users can achieve the effort and the riding comfort with the most appropriate and ergonomic pedaling method. efficacy.

However, the above description is only a preferred embodiment of the present invention. When it is not possible to limit the scope of the creation of the present invention, that is, the simple equivalent change and modification according to the scope of the patent application and the new description of the creation are all creations. Within the scope of the patent.

(1) ‧ ‧ eccentric shaft

(11)‧‧‧Fixed parts

(111)‧‧‧First engagement department

(12)‧‧‧ Bearing parts

(13) ‧‧‧Fixed holes

(2) ‧‧‧ crank

(21)‧‧‧First perforation

(211)‧‧‧Second engagement department

(22)‧‧‧Second perforation

(3)‧‧‧ Gears

(31)‧‧‧Axis hole

(41)‧‧‧ screws

(42)‧‧‧ Nuts

Claims (5)

An eccentric rotating shaft includes a fixing member, and a bearing member is disposed on the fixing member in an eccentric state. A variable crank structure includes: an eccentric rotating shaft, comprising a fixing member, the fixing member is provided with a first engaging portion, and a bearing member is disposed on the fixing member in an eccentric state; a crank, the crank end a first through hole and a second through hole at the other end, the bearing member of the eccentric rotating shaft passes through the first through hole, and the first engaging portion is engaged with the second engaging portion disposed at one of the circumferences of the first through hole And having a distance between the bearing member and the second through hole. The variator crank structure of claim 2, wherein the first engaging portion is a plurality of engaging blocks that are disposed on the fixing member, and the second engaging portion is correspondingly disposed. a plurality of engaging grooves of the first perforated periphery. A range cranking set includes: two eccentric rotating shafts, each of the eccentric rotating shafts includes a fixing member, the fixing member is provided with a first engaging portion, and each of the bearing members is eccentrically disposed on the fixing member And a fixing hole is formed by the fixing member to the two ends of the bearing member; two cranks, the crank has a first through hole at one end and a second through hole at the other end, and the bearing member of the eccentric rotating shaft passes through The first through hole is engaged with the first engaging portion to be disposed at a second engaging portion of the first perforating circumference, and has a distance between the bearing member and the second through hole; a gear receiving tray having a shaft hole, the first perforations of the two cranks respectively corresponding to the shaft holes, the two cranks are on the same extension line, and the second perforations of the two cranks are opposite to the two ends of the extension line; Passing the fixing holes of the two eccentric rotating shafts to lock the crank to the gear receiving tray on. The variable crank set according to claim 4, wherein the first engaging portion is a plurality of engaging blocks ringed on the fixing member, and the second engaging portion is correspondingly disposed. a plurality of engaging grooves of the first perforated periphery.