TWI688511B - Device for bicycle - Google Patents

Abstract

To provide a bicycle device that can be manufactured at low cost.

The bicycle device includes: a shaft member, a nut member, an arm member, and a mounting structure; the shaft member has a flange portion, a support portion provided closer to the bicycle frame side than the flange portion, and is screwed into the above A bicycle frame and a first screw portion provided closer to the bicycle frame side than the support portion, and a second screw portion provided between the support portion and the first screw portion; the nut member is screw-fitted to The second screw portion; the arm member is rotatably supported by the support portion between the flange portion and the nut member screwed into the second screw portion, and has: for inserting the support The through hole of the part and the opposite part facing the flange part in the axial direction of the shaft member; the mounting structure is used to mount the shaft member to the bicycle frame to prevent the first screw part from Screwing into the bicycle frame causes the mounting force applied to the shaft member to be transmitted to the support portion.

Description

Device for bicycle

The present invention relates to a bicycle device.

The bicycle device disclosed in Patent Document 1 includes an arm member that is rotatably attached to a bicycle frame. A nut member is arranged between the arm member and the frame. The shaft member is arranged in the through hole and the inner peripheral portion of the nut member. The shaft member includes an outer shaft member and an inner shaft member. The inner shaft member is disposed in a through hole formed in the outer shaft member. At the frame-side end of the inner shaft member, a first screw portion for attachment to the frame is formed. A second screw portion for screwing into the nut member is formed at the frame-side end of the outer shaft member. The end of the inner shaft member on the opposite side of the frame is located on the opposite side of the frame than the outer shaft member. A flange portion is formed at the end of the inner shaft member opposite to the frame. By letting the flange portion of the inner shaft member contact the end of the outer shaft member opposite to the frame in the axial direction, the movement of the inner shaft member toward the frame side is restricted.

[Advanced technical literature]

[Patent Literature]

[Patent Document 1] Specification of US Patent No. 9446814

In the bicycle device described above, when the first screw portion is attached to the frame, the inner shaft member and the outer shaft member need to have a size suitable for the arm member to operate. Therefore, the manufacturing cost is high.

An object of the present invention is to provide a bicycle device that can be manufactured at low cost.

A bicycle device according to a first aspect of the present invention includes: a shaft member, a nut member, an arm member, and a mounting structure; the shaft member includes a flange portion, and a support provided closer to the bicycle frame than the flange portion Part, a first screw part for screwing into the bicycle frame and provided closer to the bicycle frame side than the support part, and a second screw part provided between the support part and the first screw part; The nut member is screw-fitted to the second screw portion; the arm member is rotatably supported by the support portion between the flange portion and the nut member screw-fitted to the second screw portion, And has: a through hole for inserting the support portion, and a facing portion opposed to the flange portion in the axial direction of the shaft member; and the mounting structure for mounting the shaft member to the bicycle frame, to To prevent the mounting force applied to the axle member from being transmitted to the Support.

With the above structure, the mounting force applied to the axle member when the first screw portion is screwed into the bicycle frame is not transmitted to the support portion. Therefore, the requirements for assembly accuracy are reduced, and the dimensional tolerances can be larger, which can be manufactured at low cost.

In the bicycle device of the second aspect of the first aspect, the arm member includes a first arm member and a second arm member rotatable relative to the first arm member.

With the above structure, even when the first arm member and the second arm member are used, they can be easily assembled and can be manufactured at low cost.

Among the first or second types, the third type of bicycle device further includes a first bearing provided between the support portion and the arm member to support the arm member so as to be The support portion rotates.

With the above-described structure, the first bearing can smoothly swing the arm member relative to the support portion.

In any one of the first to third types, the fourth type of bicycle device further includes a second bearing provided between the arm member and the nut member to support the nut member Rotate with respect to the arm member.

With the above structure, the arm member can smoothly swing and rotate with respect to the nut member by the second bearing.

In any one of the first to fourth types, the fifth type of bicycle device, the mounting structure includes the shaft member, the shaft member The flange portion, the support portion, the first screw portion, and the second screw portion are integrally formed.

With the above structure, by forming the flange portion, the support portion, the first screw portion, and the second screw portion on a single shaft member, a simple composition can be achieved.

In the fifth type of the bicycle device of the sixth type, the outer diameter of the second screw portion is larger than the outer diameter of the first screw portion.

With the above structure, since the outer diameter of the second screw portion is larger than the outer diameter of the first screw portion, the first screw portion can easily pass through the inside of the nut member.

In the seventh type bicycle device of the fifth or sixth type, the shaft member is formed in a hollow cylindrical shape.

With the above structure, it is possible to contribute to weight reduction of the bicycle device. When the first screw portion is screwed into the bicycle frame, the tensile stress that activates the shaft member can be reduced, and the shaft member can be stably fixed to the bicycle frame.

In any one of the fifth to seventh types of the eighth type of bicycle device, the nut member is a double nut including a first nut and a second nut.

With the above structure, the arm member is appropriately positioned on the shaft member between the double nut and the flange portion.

In the bicycle apparatus of the ninth aspect of the eighth aspect, the second nut is disposed closer to the bicycle frame side than the first nut, and the second nut is a reverse screw.

With the above structure, the first screw part is screwed into the bicycle frame. In this case, it is possible to prevent the pressing force accompanying the rotational force of the second nut from being applied to the first nut. Therefore, the arm member can be arranged more stably.

In a bicycle device of a tenth mode among any of the above-mentioned fifth to ninth modes, the shaft member has an engaging portion that can be engaged with a tool.

With the above structure, by engaging the tool with the engaging portion, the shaft member can be easily attached to the bicycle frame.

In the eleventh aspect of the tenth aspect of the bicycle device, the engagement portion is provided at least at an end of the shaft member opposite to the bicycle frame.

With the above structure, the operator can easily engage the tool with the engaging portion.

In any one of the first to fourth types of the bicycle device of the twelfth type, the shaft member includes a hollow shaft-shaped first shaft member having the support portion, and the first screw portion and A second shaft member for inserting the first shaft member; the first shaft member has: a restricting portion for restricting movement of the second shaft member toward the bicycle frame side; and the second shaft member has: The restricted portion restricts the movement toward the bicycle frame side by the restricting portion; the mounting structure arranges the restricting portion and the restricted portion closer to the bicycle frame side than the support portion.

With the above structure, since the restriction portion of the first shaft member and the restricted portion of the second shaft member are arranged closer to the bicycle frame side than the support portion, the mounting force applied to the shaft member is not transmitted to the support portion. So let the assembly The accuracy requirements are reduced, and the dimensional tolerances can be larger, which can be manufactured at low cost.

In the bicycle device of the thirteenth aspect among the twelfth aspect, the outer diameter of the second screw portion is larger than the outer diameter of the first screw portion.

With the above structure, since the outer diameter of the second screw portion is larger than the outer diameter of the first screw portion, the first screw portion can easily pass through the inside of the nut member and the inside of the second shaft member.

In the bicycle device of the fourteenth mode among the twelfth or thirteenth mode, the flange portion and the second screw portion are provided on the first shaft member.

With the above-mentioned structure, by providing the flange portion and the second screw portion on the first shaft member, it can be easily composed.

In the bicycle device of the fifteenth mode among any of the eleventh to fourteenth modes, the nut member is a double nut including a first nut and a second nut.

With the above structure, the arm member is appropriately positioned on the shaft member between the double nut and the flange portion.

In any one of the eleventh to fifteenth types of the bicycle device of the sixteenth type, the second shaft member has an engaging portion that can be engaged with a tool.

With the above structure, by engaging the tool with the engaging portion, the shaft member can be easily attached.

Among the 16th types, the 17th type is for bicycles. In the device, the engaging portion is provided at an end opposite to the bicycle frame.

With the above structure, the operator can easily engage the tool with the engaging portion.

The bicycle device can be manufactured at low cost.

10.80: Brake device for bicycle (device for bicycle)

12, 82: shaft member

14, 15: arm member

14A: through hole

14B: Opposite section

16: Nut member

18.84: Installation structure

20: 1st bearing

22: 2nd bearing

34: 1st arm member

44: 2nd arm member

46, 86: flange part

48, 88: support

50, 90: the first screw part

52, 92: Second screw part

54, 98: Engagement Department

56: 1st nut

58: 2nd nut

94: 1st axis member

94C: Restriction Department

96: 2nd axis member

96C: Restricted Department

F: Bicycle frame

FIG. 1 is a front view of a bicycle equipped with a bicycle brake device according to the first embodiment.

FIG. 2 is a perspective view of the arm member of the bicycle brake device of FIG. 1.

FIG. 3 is a cross-sectional view taken along line 3-3 of FIG. 2.

Fig. 4 is a side view of the braking member and the mounting member of Fig. 1.

Figure 5 is a cross-sectional view taken along line 5-5 of Figure 4.

Fig. 6 is a perspective view of the nut member of Fig. 4;

Figure 7 is a cross-sectional view taken along line 7-7 of Figure 5.

FIG. 8 is a cross-sectional view of a mounting structure of a bicycle brake device of a second embodiment.

(First embodiment)

The bicycle device of the first embodiment will be described with reference to FIGS. 1 to 7. The bicycle device of the first embodiment is a bicycle rim brake device. Hereinafter, in this embodiment, the bicycle device is described as a bicycle brake device.

As shown in FIG. 1, the bicycle brake device 10 is attached to the bicycle frame F and brakes the wheels W. In one example, the bicycle brake device 10 is attached to the front fork of the bicycle frame F and brakes the front wheels among the wheels W. In another example, the bicycle brake device 10 is attached to a seat cushion bracket to brake the rear wheels among the wheels W.

The bicycle brake device 10 includes two shaft members 12, an arm member (cable fixing arm member) 14, an arm member (cable holding arm member) 15, a nut member 16 (refer to FIG. 2), and an attachment structure 18 ( (Refer to Figure 3). The bicycle brake device 10 preferably further includes: a first bearing 20 shown in FIG. 3, a second bearing 22, a positioning member 24, a washer 26, a brake member 30 shown in FIG. 1, an attachment member 32, and弹压 EL42.

The arm members 14 and 15 are respectively provided on the shaft member 12 and are attached to the bicycle frame F. The nut member 16, the mounting structure 18, the first bearing 20, the second bearing 22, the positioning member 24, and the washer 26 are respectively provided in correspondence with the two shaft members 12. The braking member 30 and the mounting member 32 are respectively provided corresponding to the arm members 14 and 15.

The arm member 14 includes a first arm member 34 and a second arm member 44 that is rotatable with respect to the first arm member 34. In the first arm member 34 The first end portion 34A is provided with a fixing member 38 for fixing the inner cable C1 of the cable C. The fixing member 38 is formed with a hole portion (not shown) for inserting the inner cable C1 of the cable C. The brake member 30 is connected to the second end portion 34B of the first arm member 34 via the attachment member 32.

As shown in FIG. 3, the first arm member 34 and the second arm member 44 are arranged at adjacent positions in the axial direction of the shaft member 12. The second arm member 44 is arranged closer to the bicycle frame F side than the first arm member 34. As shown in FIG. 2, the second arm member 44 overlaps the plate-shaped first member 45A and the plate-shaped second member 45B. At one end of the first member 45A and the plate-shaped second member 45B, a through-hole 44A (refer to FIG. 3) through which the shaft member 12 is inserted is formed. A roller 45C is attached to the other end of the first member 45A and the plate-shaped second member 45B, and the roller 45C is rotatably supported by the first member with respect to the first member 45A and the plate-shaped second member 45B 45A and the plate-shaped second member 45B.

As shown in FIG. 1, the arm member 15 has a main body 36. A holding member 40 is attached to the first end 36A of the main body 36 to hold the outer shell C2 of the cable C. The holding member 40 is formed with a hole (not shown) for holding the end of the outer shell C2 of the cable C and inserting the inner cable C1. The brake member 30 is connected to the second end 36B of the main body 36 via the attachment member 32. Between the first end 36A and the second end 36B of the main body 36, a sliding surface 36D is formed in contact with the roller 45C to slide the roller 45C.

As shown in FIG. 2, the first end 42A of the urging member 42 is attached to the middle portion of the second arm member 44. In other words, The first end 42A of the member 42 is connected to the middle portion 34C of the first arm member 34 via the second arm member 44. The second end portion 42B of the urging member 42 is connected to the middle portion 36C of the arm member 15 shown in FIG. 1. The urging member 42 applies urging force to the first arm member 34 and the arm member 15 to separate the second end portion 34B of the first arm member 34 and the second end portion 36B of the body portion 36 of the arm member 15 from each other. As shown in FIG. 1, by attaching the arm members 14 and 15 to the bicycle frame F, the second end portion 34B of the first arm member 34 and the second end portion 36B of the body portion 36 of the arm member 15 are not separated further .

With reference to FIG. 3, the attachment structure 18 for attaching the bicycle brake device 10 to the bicycle frame F will be described. The attachment structure 18 attaches the bicycle brake device 10 to the bicycle frame F by the shaft member 12 penetrating the arm member 14.

The arm member 14 has a through hole 14A and a facing portion 14B. The through hole 14A is composed of a through hole 34D formed in the middle portion 34C of the first arm member 34 and a through hole 44A of the second arm member 44. At least a part of the shaft member 12 penetrates the through hole 14A, and at least a part of the shaft member 12 faces the facing portion 14B. The opposing portion 14B is provided on the first arm member 34. Specifically, the opposing portion 14B is formed in the opening of the through hole 14A opposite to the bicycle frame F. Although FIG. 3 shows the through hole 14A of the arm member 14 and its surroundings, since the through hole of the arm member 15 (refer to FIG. 1) and its surroundings also have the same structure, the illustration and details of the arm member 15 are omitted. instruction of. In the arm member 15, the first arm member 34 corresponds to the main body 36 (refer to FIG. 1 ). Arm structure The piece 15 has a structure in which the second arm member 44 is omitted.

The second bearing 22 is arranged on the bicycle frame F side of the second arm member 44. A nut member 16 is arranged on the bicycle frame F side of the second bearing 22. The shaft member 12 penetrates the through hole 14A, the inner peripheral portion of the second bearing 22, and the inner peripheral portion of the nut member 16.

The shaft member 12 has a flange portion 46, a support portion 48, a first screw portion 50, and a second screw portion 52. The shaft member 12 has an engaging portion 54 that can be engaged with a tool. The shaft member 12 is formed in a hollow cylindrical shape. The flange portion 46 is provided at the first end portion 12A of the shaft member 12 on the side opposite to the bicycle frame F. The support portion 48 is provided closer to the bicycle frame F side than the flange portion 46. The first screw portion 50 is provided closer to the bicycle frame F side than the support portion 48 in order to be screwed into the bicycle frame F. The first screw portion 50 is provided at the second end portion 12B of the shaft member 12 on the bicycle frame F side. The second screw portion 52 is provided between the support portion 48 and the first screw portion 50. From the first end portion 12A toward the second end portion 12B, the flange portion 46, the support portion 48, the second screw portion 52, and the first screw portion 50 are provided on the shaft member 12 in this order.

The first screw part 50 is a male screw. The shaft member 12 has a gap between the second screw portion 52 and the first screw portion 50. The outer diameter of the second screw portion 52 is larger than the outer diameter of the first screw portion 50. One of the first screw portion 50 and the second screw portion 52 is a forward screw. The other of the first screw portion 50 and the second screw portion 52 is a reverse screw.

The support portion 48 is inserted into the through hole 14A. The flange portion 46 protrudes from the end of the through hole 14A opposite to the bicycle frame F. phase The opposing portion 14B faces the flange portion 46 in the axial direction of the shaft member 12. A washer 26 is interposed between the opposing portion 14B and the flange portion 46. The gasket 26 may be omitted, and the opposing portion 14B may directly contact the flange portion 46.

The arm member 14 is rotatably supported by the support portion 48 between the flange portion 46 and the nut member 16. The first bearing 20 is provided between the support portion 48 and the arm member 14 to support the arm member 14 so as to be rotatable relative to the support portion 48. The first bearing 20 includes a first portion 20A disposed between the first arm member 34 and the support portion 48, and a second portion 20B disposed between the second arm member 44 and the support portion 48. In one example, the first part 20A and the second part 20B are sliding bearings. At least one of the first portion 20A and the second portion 20B may be changed to a radial bearing including rolling elements. The second part 20B is omitted in the arm member 15 (refer to FIG. 1).

The second screw portion 52 and the first screw portion 50 protrude from the bicycle frame F side of the through hole 14A. The second screw portion 52 is arranged on the inner peripheral portion of the nut member 16. The first screw portion 50 protrudes closer to the bicycle frame F side than the nut member 16.

The positioning member 24 is disposed between the first arm member 34 and the second arm member 44 to position the second arm member 44 in the axial direction. The positioning member 24 may be omitted. When the positioning member 24 is omitted, the first portion 20A and the second portion 20B of the first bearing 20 may be integrated. The positioning member 24 is omitted from the arm member 15 (refer to FIG. 1).

The second bearing 22 is provided between the arm member 14 and the nut member 16 to support the nut member 16 so as to be rotatable relative to the arm member 14. The second bearing 22 is sandwiched between the second arm member 44 and the nut member 16 between. The second bearing 22 is a thrust bearing. In the arm member 15 (refer to FIG. 1 ), the second bearing 22 is sandwiched between the main body portion 36 (refer to FIG. 1) and the nut member 16.

The nut member 16 is a double nut and includes a first nut 56 and a second nut 58. The second nut 58 is arranged closer to the bicycle frame F than the first nut 56 is. The nut member 16 is screw-fitted to the second screw portion 52. The second screw part 52 is a male screw. The second screw portion 52 has a first portion 52A that is screw-fitted with the first nut 56 and a second portion 52B that is fitted with the second nut 58. By fitting the nut member 16 into the second screw portion 52 from the second end 12B side of the shaft member 12, the arm member 14 and the second bearing 22 are held by the nut member 16 and the flange in the axial direction of the shaft member 12部46之间。 Between 46.

The engaging portion 54 is provided at least on the first end portion 12A opposite to the bicycle frame F. In one example, the engaging portion 54 is provided in a portion corresponding to the flange portion 46 in the through hole 14A. The engaging portion 54 has, for example, a polygonal shape that allows a tool, that is, a wrench, to be engaged.

The mounting structure 18 is used to mount the shaft member 12 to the bicycle frame F so as to prevent the mounting force applied to the shaft member 12 from being transmitted to the support portion 48 by screwing the first screw portion 50 into the bicycle frame F. The mounting structure 18 includes a shaft member 12 integrally formed with a flange portion 46, a support portion 48, a first screw portion 50, and a second screw portion 52. The shaft member 12 is integrally formed with a flange portion 46, a support portion 48, a first screw portion 50, and a second screw portion 52. Therefore, when the first screw portion 50 is screwed into the bicycle frame F, even if the flange portion 46 is in contact with the facing portion 14B Even if it is touched, the force in the thrust direction is not easily applied to the support 48. Therefore, even if the tool is engaged with the engaging portion 54 toward the bicycle frame F side and the shaft member 12 is rotated, the arm member 14 can be stably supported by the support portion 48.

The brake member 30 and the attachment member 32 that attaches the brake member 30 to the arm member 14 will be described with reference to FIGS. 1 and 4 to 7. FIGS. 4 to 7 show the second end portion 34B of the first arm member 34 and its surroundings, but the second end portion 36B of the arm member 15 and its surroundings have the same structure, so the arm member 15 is omitted. Icon and detailed description.

As shown in FIG. 1, the braking member 30 includes a command piece 60 in contact with the wheel W, and a holder 62 for holding the command piece 60. The holder 62 is formed in a plate shape. On one surface of the holder 62, a groove portion for mounting the command piece 60 is formed.

As shown in FIG. 5, a hole 62A is formed in the holder 62. Around the hole 62A, a tapered surface 62B is formed that inclines in a direction away from the piece 60 as it goes toward the hole 62A.

The attachment member 32 shown in FIG. 4 attaches the brake member 30 to each arm member 14 via the attachment holes 14C formed in the second end 34B of the first arm member 34 and the second end 36B of the arm member 15. , 15. The mounting hole 14C is formed into a long hole shape.

As shown in FIG. 5, the mounting member 32 includes a nut member 64 and a screw member 66.

As shown in FIG. 6, the first end portion 64A of the nut member 64 in the axial direction is formed in an inverted tapered shape whose outer diameter increases as it goes toward the end portion. Nut structure The second end portion 64B in the axial direction of the material 64 is formed with a flat portion 64C at a part of the outer peripheral portion. Preferably, two planar portions 64C are formed, and the two planar portions 64C are formed at positions facing each other across the central axis of the nut member 64. The outer diameter of the nut member 64 including the flat portion 64C is smaller than the width LA in the short-side direction of the mounting hole 14C of the arm member 14 shown in FIG. 4, and the difference between the outer diameter and the width LA is preferably small.

As shown in FIG. 5, the nut member 64 is inserted into the hole 62A, and the hole 62A is formed in the holder 62. At least a part of the first end portion 64A of the nut member 64 is arranged in the space formed between the holder 62 and the command piece 60. The inner diameter of the hole portion 62A of the holder 62 is smaller than the maximum outer diameter of the first end portion 64A of the nut member 64 and larger than the minimum inner diameter thereof. Therefore, the restriction nut member 64 comes off from the hole 62A of the holder 62. At least a part of the second end portion 64B of the nut member 64 is inserted into the mounting hole 14C of the arm member 14.

The screw member 66 has a male thread on the outer peripheral portion. The screw member 66 has a washer 68 and an arm member 14 sandwiched between the head member 66A and a conical spacer 70 sandwiched between the nut member 64 and the holder 62, and is screwed into Nut member 64.

As shown in FIG. 4, when the screw member 66 is attached to the nut member 64, the screw member 66 is screwed into the nut member 64 in a state of being inserted into the hole 62A of the holder 62 and the attachment hole 14C of the arm member 14. At this time, the nut member 64 restricts the rotation inside the mounting hole 14C by bringing the flat portion 64C into contact with the mounting hole 14C. Therefore, the operator can easily attach the screw member 66 to the nut member 64, thereby improving the work efficiency.

By pulling the inner cable C1 of the cable C shown in FIG. 1, a force that rotates about the shaft member 12 is applied to the first arm member 34 of the arm member 14. At this time, the roller 45C provided on the second arm member 44 of the arm member 14 moves on the sliding surface 36D of the arm member 15 while rotating. This causes the arm member 15 to swing around the shaft member 12. As a result, the second end 34B of the arm member 14 and the second end 36B of the arm member 15 move against each other against the urging force from the urging member 42 and the brake member 30 contacts the wheel 60 W brakes wheel W.

As shown in FIG. 7, in a state where the brake member 30 is attached to the arm member 14 by the attachment member 32, a gap S is formed between the hole 62A of the holder 62 and the first end 64A of the nut member 64. Therefore, as shown by the arrow A in FIG. 7, it is possible to swing around the central axis of the screw member 66. Therefore, the wheel W shown in FIG. 1 can be properly contacted.

(Second embodiment)

The bicycle brake device 80 of the second embodiment will be described with reference to FIG. 8. The bicycle brake device 80 of the second embodiment is the same as the bicycle brake device 10 of the first embodiment except that the shaft member 12 is changed to the shaft member 82 including the first shaft member 94 and the second shaft member 96. Therefore, for the structure common to the first embodiment, the same reference numerals as those of the first embodiment are added, and repeated explanations are omitted.

The bicycle brake device 80 includes a shaft member 82, an arm member 14, a nut member 16, and an attachment structure 84. The bicycle brake device 80 preferably further includes: a first bearing 20, a second bearing 22, The positioning member 24, the washer 26, the biasing member 28, the braking member 30, and the mounting member 32.

The attachment structure 84 for attaching the bicycle brake device 80 to the bicycle frame F will be described. The attachment structure 84 attaches the bicycle brake device 80 to the bicycle frame F by the shaft member 82 penetrating the arm member 14.

The arm member 14 has a through hole 14A and a facing portion 14B. The shaft member 82 is disposed in the through hole 14A of the arm member 14. Although FIG. 8 shows the through hole 14A of the arm member 14 and its periphery, the through hole of the arm member 15 and its periphery also have the same structure, so the illustration and detailed description of the arm member 15 are omitted.

The shaft member 82 has a flange 86, a support 88, a first screw 90, and a second screw 92. The shaft member 82 includes a first shaft member 94 and a second shaft member 96. The first shaft member 94 and the second shaft member 96 are formed as different individuals.

The first shaft member 94 has a support portion 88 and is formed in a hollow cylindrical shape. The flange portion 86 and the second screw portion 92 are provided on the first shaft member 94. The flange portion 86 is provided at the first end portion 94A of the first shaft member 94 opposite to the bicycle frame F. The support portion 88 is provided closer to the bicycle frame F side than the flange portion 86. The second screw portion 92 is provided between the support portion 88 and the second end portion 94B.

The first shaft member 94 has a restricting portion 94C for restricting the movement of the second shaft member 96 toward the bicycle frame F side. The restricting portion 94C includes a drop formed in the through hole 94D of the first shaft member 94. 1st axis The member 94 is formed such that its inner diameter closer to the bicycle frame F side than the restricting portion 94C is smaller than the inner diameter closer to the opposite side of the bicycle frame F than the restricting portion 94C. A screw portion 94E is formed in a portion of the through hole 94D closer to the bicycle frame F side than the restricting portion 94C. The screw portion 94E is a female screw that can be fitted into the first screw portion 90.

The second shaft member 96 has the first screw portion 90 and is inserted into the first shaft member 94. The second shaft member 96 is formed in a solid shape. In the second shaft member 96, the outer diameter of the first end 96A on the bicycle frame F side is smaller than the outer diameter of the second end 96B on the opposite side of the bicycle frame F. The second shaft member 96 has a restricted portion 96C whose movement toward the bicycle frame F side is restricted by the restricting portion 94C. The restricted portion 96C includes a drop formed at the first end 96A. The second shaft member 96 is formed such that its inner diameter closer to the bicycle frame F side than the restricted portion 96C is smaller than the inner diameter closer to the bicycle frame F side than the restricted portion 96C.

The first screw portion 90 is provided closer to the bicycle frame F side than the support portion 88 in order to be screwed into the bicycle frame F. The first screw part 90 is a male screw. The first screw portion 90 is provided on the second shaft member 96 and the second end portion 96B. In a state where the second shaft member 96 is disposed inside the first shaft member 94, from the opposite side of the bicycle frame F toward the bicycle frame F side, the flange portion 86, the support portion 88, the second screw portion 92, and the first screw The parts 90 are sequentially provided on the shaft member 82.

The support portion 88 is inserted into the through hole 14A. The flange portion 86 protrudes from the end of the through hole 14A opposite to the bicycle frame F. The opposing portion 14B faces the flange portion 86 in the axial direction of the shaft member 82. A washer 26 is interposed between the opposing portion 14B and the flange portion 86. The gasket 26 may be omitted, and the opposing portion 14B may directly contact the flange portion 86.

The arm member 14 is rotatably supported by the support portion 88 between the flange portion 86 and the nut member 16. The first bearing 20 is provided between the support portion 88 and the arm member 14 to support the arm member 14 so as to be rotatable relative to the support portion 88.

The second screw portion 92 and the first screw portion 90 protrude from the bicycle frame F side of the through hole 14A. The second screw portion 92 is arranged on the inner peripheral portion of the nut member 16. The first screw portion 90 protrudes toward the bicycle frame F side of the nut member 16.

The second bearing 22 is provided between the arm member 14 and the nut member 16 to support the nut member 16 so as to be rotatable relative to the arm member 14. The second bearing 22 is sandwiched between the second arm member 44 and the nut member 16. The second bearing 22 is a thrust bearing. In the arm member 15 (refer to FIG. 1 ), the second bearing 22 is sandwiched between the main body portion 36 (refer to FIG. 1) and the nut member 16.

The nut member 16 is a double nut and includes a first nut 56 and a second nut 58. The nut member 16 is screwed and fitted into the second screw portion 92. The second screw part 92 is a male screw. The second screw portion 92 has a first portion 92A that is screw-fitted with the first nut 56 and a second portion 92B that is fitted with the second nut 58. By fitting the nut member 16 into the second screw portion 92 from the second end portion 94B side of the first shaft member 94, the arm member 14 and the second bearing 22 are held by the nut member in the axial direction of the first shaft member 94 16 and the flange 86.

The outer diameter of the second screw portion 92 is larger than the outer diameter of the first screw portion 90. One of the first screw portion 90 and the second screw portion 92 is a forward screw. The other of the first screw part 90 and the second screw part 92 is a reverse screw.

The second shaft member 96 has an engaging portion 98 that can be engaged with a tool. The engaging portion 98 is provided at the first end portion 96A opposite to the bicycle frame F. The engaging portion 98 has, for example, a polygonal shape that can be engaged by a tool, that is, a wrench.

The attachment structure 84 is used to attach the shaft member 82 to the bicycle frame F so as to prevent the mounting force applied to the shaft member 82 by screwing the first screw portion 90 into the bicycle frame F to be transmitted to the support portion 88. The attachment structure 84 is configured by arranging the restricting portion 94C and the restricted portion 96C closer to the bicycle frame F side than the supporting portion 88.

When the bicycle brake device 80 is attached to the bicycle frame F, an assembly is prepared in which the first shaft member 94 is inserted through the through hole 14A, the inner peripheral portion of the second bearing 22, and the inner peripheral portion of the nut member 16. The user inserts the second shaft member 96 into the through hole 94D of the first shaft member 94 of the assembly, and rotates the second shaft member 96 by engaging the tool with the engaging portion 98 to install the bicycle brake device 80 For bicycle frame F. At this time, the first screw portion 90 of the second shaft member 96 is screwed into the screw portion 94E of the first shaft member 94 and the bicycle frame F. The restricting portion 94C and the restricted portion 96C for restricting the axial movement of the second shaft member 96 are disposed closer to the bicycle frame F side than the supporting portion 88, so the first screw portion 90 is screwed into the bicycle In the case of frame F, even The restricting portion 94C is in contact with the restricted portion 96C, and the force in the thrust direction is not easily applied to the support portion 88. Therefore, even if the tool is engaged with the engaging portion 98 and the second shaft member 96 is rotated, the arm member 14 can be stably supported by the support portion 88.

(Modification)

The description of the above embodiments is an example of the form adopted by the bicycle device of the present invention, and is not intended to limit the form. The bicycle device of the present invention may take a combination of, for example, the following modifications of the above-described embodiment and at least two modifications that do not contradict each other. In the following modified examples, the same symbols as in the embodiment are added to the parts common to the embodiment, and the description thereof is omitted.

The shaft member 12 of the first embodiment may be formed into a solid shape. Alternatively, the portion of the shaft member 12 where the first screw portion 50 is formed may be solid, and the portion closer to the first end portion 12A side than the first screw portion 50 may be formed to be hollow.

The second screw portion 92 of the second embodiment may be provided on the second shaft member 96.

The nut member 16 of each embodiment may be changed to a nut member having a loosening prevention function other than the double nut.

In each embodiment, the mounting structures 18 and 84 may be provided only on one of the arm members 14 and 15.

The outer peripheral portion of the second end portion 64B of the nut member 64 of the mounting member 32 of each embodiment may be formed in a square shape. Nut The outer peripheral portion of the second end 64B of the member 64 has a polygonal shape with four or more corners. In a state where the nut member 64 is inserted into the mounting hole 14C of the arm member 14, any structure may be adopted as long as the nut member 64 has a rotation preventing structure for restricting rotation to the mounting hole 14C.

In the above embodiments, although the present invention has been described as a case where the present invention is applied to a bicycle brake device, the present invention can be applied to various bicycles having a movable member (arm member) such as a derailleur, a shift operating device, etc. Device.

10: Bicycle brake device (bicycle device)

12: Shaft member

12A: 1st end

12B: 2nd end

14: Arm member

14A: through hole

14B: Opposite section

16: Nut member

18: Installation structure

20: 1st bearing

20A: Part 1

20B: Part 2

22: 2nd bearing

24: positioning member

26: Washer

34: 1st arm member

34C: Middle section

34D: through hole

44: 2nd arm member

44A: through hole

45A: 1st component

45B: Component 2

46: flange part

48: Support

50: the first screw part

52: Second screw part

52A: Part 1

52B: Part 2

54: Engagement Department

56: 1st nut

58: 2nd nut

F: Bicycle frame

Claims (17)

A bicycle device includes: a shaft member, a nut member, an arm member, and a mounting structure; the shaft member has a flange portion, a support portion provided closer to the bicycle frame side than the flange portion, for screwing in The bicycle frame and a first screw portion provided closer to the bicycle frame side than the support portion, and a second screw portion provided between the support portion and the first screw portion; the nut member is screw-fitted The second screw portion; the arm member is rotatably supported by the support portion between the flange portion and the nut member screwed into the second screw portion, and has: for inserting the The through hole of the support portion and the facing portion opposed to the flange portion in the axial direction of the shaft member; the mounting structure is used to mount the shaft member to the bicycle frame to prevent the first screw Screwing the part into the bicycle frame causes the mounting force applied to the shaft member to be transmitted to the support part. A bicycle device according to claim 1 of the patent application, wherein the arm member includes a first arm member and a second arm member rotatable relative to the first arm member. The bicycle device according to claim 1 or 2 further includes a first bearing provided between the support portion and the arm member to support the arm member with respect to the support部转。 Department rotation. If the bicycle device of claim 1 or 2 is applied, its In addition, a second bearing is further provided. The second bearing is provided between the arm member and the nut member, and supports the nut member rotatably with respect to the arm member. A bicycle device as claimed in claim 1, wherein the mounting structure includes the shaft member, and the shaft member is integrally formed with the flange portion, the support portion, the first screw portion, and the second screw portion . As in the bicycle device of claim 5, the outer diameter of the second screw portion is larger than the outer diameter of the first screw portion. A bicycle device according to claim 5 or 6, wherein the shaft member is formed in a hollow cylindrical shape. A bicycle device according to claim 5 or 6, wherein the nut member is a double nut including a first nut and a second nut. A bicycle device according to claim 8 of the patent application, wherein the second nut is arranged closer to the bicycle frame side than the first nut, and the second nut is a reverse screw. A bicycle device according to claim 5 or 6, wherein the shaft member has an engaging portion that can be engaged with a tool. A bicycle device according to claim 10, wherein the engaging portion is provided at least at an end of the shaft member opposite to the bicycle frame. For example, the device for bicycles of claim 1 of patent scope, The shaft member includes: a first shaft member having the support portion and formed in a hollow cylindrical shape; and a second shaft member having the first screw portion and for inserting the first shaft member; and the first shaft member having : A restricting portion for restricting the movement of the second shaft member toward the bicycle frame side; the second shaft member has: a restricted portion whose movement toward the bicycle frame side is restricted by the restricting portion; the mounting structure , The restriction portion and the restricted portion are arranged closer to the bicycle frame side than the support portion. As in the bicycle device of claim 12, the outer diameter of the second screw portion is larger than the outer diameter of the first screw portion. A bicycle device according to claim 12 or 13, wherein the flange portion and the second screw portion are provided on the first shaft member. A bicycle device according to claim 12 or 13, wherein the nut member is a double nut including a first nut and a second nut. A bicycle device according to claim 12 or 13, wherein the second shaft member has an engaging portion that can be engaged with a tool. According to the bicycle application device of claim 16, the engaging portion is provided at an end of the second shaft member opposite to the bicycle frame.

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