TWI761020B - Chain stabilizer structure - Google Patents

Abstract

A chain stabilizer structure, which is fastened to a rear chainring of a single-speed bicycle and engages with the chain of the single-speed bicycle, comprising: a fixed arm, a swing arm, a first guide wheel, and a second guide wheel , And an elastic piece. The fixed arm is fixedly connected to one side of the rear gear plate. The swing arm is pivotally connected to the fixed arm in a swingable manner. The first guide gear train is pivotally connected to the fixed arm rotatably. The second guide gear train is pivotally connected to the swing arm rotatably. The elastic member is connected to the fixed arm and the swing arm, and an elastic force is applied to the swing arm, so that the swing arm can be pressed down relative to the fixed arm, so that the second guide wheel contacts the chain. The tension of the chain between the rear chainring and the first guide wheel can be kept stable.

Description

Chain stabilizer structure

The invention relates to the technical field of a bicycle, in particular to a chain stabilizer structure for a single-speed bicycle.

The advantage of a general single-speed bike is that it is "simple in structure" and the chain is not easy to fall off, but if you ride on a bumpy or rough road, it is easy for the chain to vibrate too much, so that the holes of the chain are not closely connected with the teeth of the rear chainring. Meshing, which causes the chain to fall off, which is commonly known as "dropping the chain". In addition, the chain will be fatigued and slack after normal use, which will also cause the chain to drop.

The above situation will make the rider feel bad, especially when the rider is not in the business of dealing with the above-mentioned dropped chain, it will make the rider more afraid of riding the bicycle.

The purpose of the present invention is to provide a chain stabilizer structure, which has the effect of keeping the tension of the chain stable.

In order to achieve the above objects and effects, the present invention provides a chain stabilizer structure which is fastened to a frame of a single-speed bicycle and is adjacent to a rear chainring, and a chain engaged with the single-speed bicycle, which comprises a base member, A swing arm, a first guide wheel, a second guide wheel and an elastic piece. The base member is fastened to one side of the frame. The swing arm is pivotally connected to the base member in a swingable manner. The first guide gear train is rotatably pivoted to the base member and engages the chain. The second guide gear train is pivotally connected to the swing arm and engages with the chain. The elastic piece is connected to the base piece and the swing arm, and applies an elastic force to the swing arm, so that the second guide wheel normally presses the chain.

In one embodiment, the base member includes a fixing arm and an adjusting arm, the fixing arm has a first end and a second end, and the fixing arm is fixed on the position adjacent to the first end. On one side of the frame, the adjustment arm is installed adjacent to the second end of the fixed arm, the first guide wheel is rotatably pivoted to the adjustment arm and adjacent to the rear sprocket, the swing arm The system is pivotally connected to the adjusting arm.

In an embodiment, the number of the adjustment arm and the swing arm is two, the two adjustment arms are parallel to each other and are separated from each other by a predetermined distance, the first guide wheel is installed between the two adjustment arms, and the two swing arms are The arms are parallel to each other and are separated from each other by a distance, one of the swing arms is swingably connected to one of the adjustment arms, the other swing arm is swingably connected to the other adjustment arm, and the second guide wheel is installed between the two swing arms. between.

In one embodiment, it further includes a shaft member and a shaft pin, wherein the shaft member includes a first shaft to be installed between the two adjustment arms and pass through the first guide wheel, and the shaft pin is installed on the two of the adjustment arms. between the arms.

In one embodiment, the elastic member is installed on the axial periphery of the shaft pin, one end of the elastic member is connected to the adjusting arm, and the other end is connected to the swing arm, so that the second guide wheel normally presses the chain.

In one embodiment, the shaft member includes a second shaft for passing through and connecting the adjusting arm and the fixing arm.

In one embodiment, it further includes a spacer installed between the fixed arm and the adjustment arm, so that a movable space is formed between the fixed arm and the adjustment arm, and one end of the swing arm is inserted into the movable space, and The swing arm is pivotally combined with the adjustment arm.

In one embodiment, the outer edge of the adjustment arm has a first flange and a second flange, the first flange is away from the second flange, and an outer edge of one end of the swing arm has a guide block , the swing arm is pivotally connected to the adjustment arm, and the guide block is located between the first flange and the second flange.

In one embodiment, it further includes a first shaft and a second shaft, and the fixed arm has a plurality of adjustment hole groups, wherein each adjustment hole group includes two separate adjustment holes and is adjacent to the first adjustment hole of the fixed arm. At two ends, the adjusting arm has two positioning holes, the two positioning holes of the adjusting arm are used for corresponding to the two adjusting holes of the adjusting group, and the first shaft and the second shaft respectively pass through the corresponding The positioning hole and the adjustment hole.

Hereinafter, according to the purpose and effect of the present invention, preferred embodiments are given and described in detail in conjunction with the drawings.

11: Frame

12: Chain

13: Front chainring

15: Pedal Crankset

20: Rear chainring

30: Base piece

32: Fixed arm

320: First End

322: Second End

34: Adjustment Arm

342: The first connection hole

344: First flange

345: Second flange

346: Positioning hole

36: Adjust the hole group

360: Adjustment hole

37: Shaft

38: The first axis

39: Second axis

42: Swing arm

420: Second connection hole

422: Guide block

44: Axle pin

50: The first guide wheel

60: The second guide wheel

70: Spacer

72: Activity interval

80: elastic parts

Fig. 1 is an external view of the present invention.

Figure 2 is an exploded view of the present invention.

Fig. 3 is an external view of the structure of the present invention.

Fig. 4 is a partial enlarged view of the present invention.

Fig. 5 is a use state diagram of the present invention.

FIG. 6 is a schematic diagram 1 of adjusting the positions of the first guide wheel and the second guide wheel according to the present invention.

FIG. 7 is a second schematic view of the present invention for adjusting the positions of the first guide wheel and the second guide wheel.

Please refer to FIG. 1 , the present invention provides a chain stabilizer structure fastened to a frame 11 of a single-speed bicycle, a front chainring 13 and a rear chainring 20 are mounted on the frame 11 and engage a chain 12 . The front chainring 13 is provided with a crank pedal set 15, the crank pedal set 15 is used to drive the front chainring 13 to rotate, the aforementioned components are the same as the conventional ones, and will not be repeated here.

The chain stabilizer structure is used to maintain the tension of the chain 12 , and includes a base member 30 , a swing arm 42 , a first guide wheel 50 , and a second guide wheel 60 . The base member 30 is fastened to the frame 11 and adjacent to the chainring 20 .

Please refer to FIGS. 2 and 3 , the base member 30 includes a fixing arm 32 and an adjusting arm 34 . In this embodiment, the number of the adjusting arms 34 is preferably two. The fixed arm 32 has a first end 320 and a second end 322 . A plurality of adjustment hole groups 36 are formed in the fixed arm 32 , and each adjustment hole group 36 penetrates the thickness direction of the fixed arm 32 . Each of the adjustment hole groups 36 includes two adjustment holes 360 that are spaced apart and are adjacent to the second end 322 of the fixing arm 32 . The fixing arm 32 is fixed to one side of the frame 11 at a position adjacent to the first end 320 . The outer edge of the adjusting arm 34 has a first flange 344 and a second flange 345 , and the first flange 344 is separated from the second flange 345 . The two adjusting arms 34 are parallel to each other and separated from each other by a predetermined distance. Secondly, the adjusting arm 34 has a first connecting hole 342 , and the first connecting hole 342 penetrates the thickness direction of the adjusting arm 34 . Furthermore, the adjusting arm 34 has two positioning holes 344 , and the two positioning holes 346 of the adjusting arm 34 are used for corresponding to the two adjusting holes 360 of the adjusting group 36 .

This embodiment further includes a shaft member 37 , the shaft member 37 includes a first shaft 38 and a second shaft 39 , and the adjustment arm 34 is pivotally connected to the fixed arm through the first shaft 38 and the second shaft 39 A set of adjustment holes 36 of 32 , specifically, the first shaft 38 and the second shaft 39 respectively pass through the corresponding positioning hole 346 and the adjustment hole 360 .

In this embodiment, the number of the swing arms 42 is preferably two. An outer edge of one end of the swing arm 42 has a guide block 422 . The swing arm 42 has a second connection hole 420 , and the second connection hole 420 penetrates the thickness direction of the swing arm 42 . The swing arm 42 is pivotally connected to the fixed arm 30 , and further, the two swing arms 42 pass through a shaft The pin 44 is pivotally connected to the adjusting arm 34 of the base member 30 , and the two swing arms 42 are parallel to each other and separated from each other by a distance. The guide block 422 of the swing arm 42 extends into and is located between the first flange 344 and the second flange 345 of the adjustment arm 34 , so that the guide block 422 is limited to the first flange 344 and the second flange 345 so that the swing arm 42 will not swing excessively.

The first guide wheel 50 is pivotally connected to the base member 30 , further, the first guide wheel 50 is pivotally connected between the two adjustment arms 34 of the base member 30 through the first shaft 38 .

The second guide wheel 60 is rotatably pivoted to the swing arm 42 , and further, the second guide wheel 60 is pivotally connected between the two swing arms 42 by a shaft. Secondly, the outer peripheral surfaces of the first guide wheel 50 and the second guide wheel 60 have a plurality of teeth.

Please refer to FIGS. 2 and 4 , this embodiment further includes a spacer 70 , and the spacer 70 is fastened to the base member 30 . Specifically, the spacer 70 is fastened to the fixing arm 32 of the base member 30 , and the spacer 70 is located between the fixing arm 32 and the adjusting arm 34 . The distance between the fixed arm 32 and the adjustment arm 34 forms a movable space 72 , and one end of the swing arm 42 is inserted into the movable space 72 , so that the swing arm 42 will not be affected by the base member 30 when moving. put one's oar in.

This embodiment further includes an elastic member 80 , such as a torsion spring; the elastic member 80 is sleeved on the shaft pin 44 , and further, one end of the elastic member 80 is inserted into the first connection hole 342 of the adjustment arm 34 , and the other end is inserted into the second connection hole 420 of the swing arm 42 , so that the swing arm 40 can be normally pressed down relative to the base member 30 .

Please refer to FIG. 5 (viewed from the opposite side of FIG. 1 ), the rear chainring 20 , the first guide wheel 50 , and the second guide wheel 60 are engaged with the chain 12 . Specifically, the chain 12 is Pass around and engage the teeth of the upper part of the first guide wheel 50 and the teeth of the lower part of the second guide wheel 60 . It is worth noting that, since the rear chainring 20 and the first guide wheel 50 are in a fixed position, and there is a gap between the rear chainring 20 and the first guide wheel 50 The relative distance is fixed. In this way, when the swing arm 42 is normally pressed down relative to the base member 30 and the second guide wheel 60 continuously contacts and presses the chain 12 , the chain 12 between the rear chainring 20 and the first guide wheel 50 is in contact with the chain 12 . Tension remains stable.

Please refer to FIGS. 6 and 7 , the adjusting arm 34 is pivotally connected to any one of the adjusting holes 360 of the fixing arm 32 selectively. Further, the position where the adjusting arm 34 is fixed to the adjusting hole 360 can be changed according to the size of the rear chainring with different numbers of teeth, and then the relative positions of the first guide wheel 50 and the second guide wheel 60 can be changed, so that the present invention can correspond to Rear chainrings with different numbers of teeth.

To sum up, in this embodiment, the swing arm 42 can be normally pressed down relative to the base member 30 , and the second guide wheel 60 can continuously contact and press the chain 12 . The position of the rear chainring 20 and the fixing arm 30 is fixed on the frame 11 , so that the tension of the chain 12 between the rear chainring 20 and the first guide wheel 50 can be kept stable. Secondly, the position of the first guide wheel 50 and the second guide wheel 60 in this embodiment can be changed relative to the fixed arm 32 by the adjustment arm 34 , so that the present invention can correspond to rear chainrings with different numbers of teeth or different sizes .

The above-mentioned embodiments are only used to illustrate the technology of the present invention and its effects, but are not intended to limit the present invention. Anyone skilled in the art can modify and change the above embodiments without violating the technical principle and spirit of the present invention. Therefore, the scope of protection of the present invention should be listed in the scope of the patent application described later. .

30: Base piece

32: Fixed arm

320: First End

322: Second End

34: Adjustment Arm

342: The first connection hole

344: First flange

345: Second flange

346: Positioning hole

36: Adjust the hole group

360: Adjustment hole

37: Shaft

38: The first axis

39: Second axis

42: Swing arm

420: Second connection hole

422: Guide block

44: Axle pin

50: The first guide wheel

60: The second guide wheel

70: Spacer

80: elastic parts

Claims (8)

A chain stabilizer structure is fastened on the frame of a single-speed bicycle and is adjacent to a rear chainring, and a chain engaged with the single-speed bicycle, which comprises: a base member, which includes a fixed arm and an adjustment arm, the fixed arm has a first end and a second end, the fixed arm is fixed on one side of the frame at a position adjacent to the first end, and the adjustment arm is installed on the side adjacent to the fixed arm The position of the second end; a swing arm pivotally connected to the adjustment arm of the base member; a first guide wheel pivotally connected to the adjustment arm of the base member and adjacent to the adjustment arm of the base member a rear sprocket, the first guide wheel engages the chain; a second guide wheel is pivotally connected to the swing arm and engages with the chain; an elastic piece is connected to the base piece and the swing arm, And an elastic force is applied to the swing arm, so that the second guide wheel normally presses the chain. The chain stabilizer structure as claimed in claim 1, wherein the number of the adjustment arm and the swing arm is two, the two adjustment arms are parallel to each other and are separated from each other by a predetermined distance, and the first guide wheel is installed on the two adjustment arms The two swing arms are parallel to each other and are separated from each other by a distance, one of the swing arms is swingably connected to the other adjustment arm, the other swing arm is swingably connected to the other adjustment arm, and the second guide wheel train is installed between the two swing arms. The chain stabilizer structure according to claim 2, further comprising a shaft member and a shaft pin, wherein the shaft member includes a first shaft for being installed between the two adjusting arms and passing through the first guide wheel, the shaft The pin is installed between the two swing arms. The chain stabilizer structure according to claim 3, wherein the elastic member is installed on the axial periphery of the shaft pin, one end of the elastic member is connected to the adjusting arm, and the other end is connected to the swing arm, so that the second guide wheel is in a normal state against the chain. The chain stabilizer structure of claim 3, wherein the shaft member includes a second shaft for passing through and connecting the adjusting arm and the fixing arm. The chain stabilizer structure of claim 1, further comprising a spacer installed between the fixed arm and the adjustment arm, so that a movable interval is formed between the fixed arm and the adjustment arm, and one end of the swing arm is into the movable interval, and the swing arm is pivotally combined with the adjustment arm. The chain stabilizer structure as claimed in claim 2 or 6, wherein the outer edge of the adjustment arm has a first flange and a second flange, the first flange is away from the second flange, and the swing arm The outer edge of one end has a guide block, the swing arm is pivotally connected to the adjustment arm, and the guide block is located between the first flange and the second flange. The chain stabilizer structure of claim 1, further comprising a first shaft and a second shaft, and the fixing arm has a plurality of adjustment hole groups, wherein each adjustment hole group includes two adjustment holes that are separated from each other and are adjacent to each other. The second end of the fixed arm, the adjustment arm has two positioning holes, the two positioning holes of the adjustment arm are used for corresponding to the two adjustment holes of the adjustment group, the first shaft and the second shaft respectively pass through through the corresponding positioning hole and the adjustment hole.

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