JPH0713687U - Bicycle hub brake - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] To provide a bicycle hub brake that can be transported relatively easily, can be easily and accurately assembled to the hub, and can prevent troubles due to intrusion of water and the like. [Structure] By externally fitting the spline portion 13d of the brake drum 13 to the spline 7a of the hub 1, the hub 1
Is connected to one end side of the so as to be integrally rotatable. The cover portion 16b provided on the brake frame 16 and the cylindrical portion 1
A stopper ring 23 is interposed between the frame 3 and 3c, and the stopper ring 23 is configured to prevent the cover 16b from coming off. is there.
As a result, the entire brake is separated from the hub 1 for compact transportation, and the brakes can be assembled at once in a unit state. The ring 23 forms a labyrinth structure for sealing between the cover portion 16b and the drum 13 to prevent water and the like from entering the inside.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention provides a bicycle hub brake including a brake drum that is integrally rotatably connected to a bicycle hub, a braking body that applies a braking action to the brake drum, and a brake operating unit that presses the braking body against the brake drum. Regarding

[0002]

[Prior art]

 Conventionally, as the bicycle hub brake described above, as disclosed in, for example, Japanese Patent Application Laid-Open No. 5-687, a brake drum is configured to be screwed to a hub, and is used as a brake drum, a braking body, and a brake operating portion. Either the roller or the brake operation cam can be carried without the hub attached to the hub and can be attached to the hub when assembling the vehicle body, or the brake drum can be integrated into the hub to form a brake. The body and the brake operation part were attached to the hub so that it could be carried as a brake hub.

[0003]

[Problems to be solved by the device]

 In the case of the former brake, it was necessary to separately assemble the brake drum, the braking body, and the brake operating part to the hub, which resulted in poor assembly work efficiency. Furthermore, during assembly, there were cases where adjustment gaps such as excessive or insufficient gaps between the brake drum and the braking body or other members, or misalignment occurred. In the case of the latter brake, it may become heavy or large, making it difficult to pack or carry. An object of the present invention is to provide a hub breaker that is easy to carry, can be easily assembled in a good adjustment state, and can prevent troubles with a simple structure.

[0004]

[Means for Solving the Problems]

 In order to achieve the object, the bicycle hub brake according to the present invention is the same as the one described at the beginning, wherein the brake drum is provided with a connecting portion which is integrally rotatably engaged with one end side of the bicycle hub. A cover portion that is fitted onto the drum is provided in the brake operating portion, and a stopper ring that prevents the brake drum from slipping out of the cover portion is interposed between the brake drum and the cover portion. It is characterized in that the brake drum, the braking body, and the brake operating section are connected in a unit state.

[0005]

[Action]

 As a brake unit in which the brake drum, braking body and brake operating part are connected in a unit state, a transportation method is used in which they are packaged and transported separately from the hub, and when the brake drum is connected to the hub by the connecting part, By adopting an assembling method that also attaches the brake operation part, it can be packed and carried in a small and lightweight state separated from the hub, as well as the distance between the brake drum and the braking body, the interlocking condition of the brake operation part, etc. It can be assembled without making any new adjustments while maintaining the good adjustment conditions that were set during manufacture. The stopper ring can form a labyrinth structure for sealing between the brake drum and the cover portion, and can prevent water and the like from entering the inside of the brake drum from between the brake drum and the cover portion.

[0006]

[Effect of device]

 Since it can be packed and transported separately from the hub and can be assembled as a unit, it can be transported relatively easily in terms of weight and size, and can be assembled efficiently. Moreover, by assembling it in the good adjustment state that was set and adjusted at the time of manufacture, it became possible to easily obtain an assembled state with good precision and good operation. In addition, since the stopper ring for unitization can be used for sealing, troubles such as water entering the brake drum and making it difficult to operate do not occur, and a highly reliable structure can be obtained easily. Came to be.

[0007]

【Example】

 As shown in FIGS. 1 and 2, a bicycle hub 1 including a pair of left and right hub collars 1a and 1b is provided with a hub brake 10 including a decorative cap 11 and an operation arm 12 at the left end portion thereof. A chain gear 2 is attached to the right end of the bicycle hub 1 to form a brake hub for the rear wheels of the bicycle. That is, as shown in FIGS. 1 and 2, the hub 1 and the hub brake 10 are penetrated, and the left and right frames 3 of the bicycle body and the ends of the chain stay S are inserted. It is configured to be tightened and attached to the left and right frames 3 and S by the tightening force of the hub shaft 4 and the mounting screw 5 configured to be mounted on the end of the hub shaft 4. Rear wheels are driven by connecting spokes 6 of rear wheels (not shown) to the left and right hub collars 1a, 1b, and attaching a drive chain (not shown) to the chain gear 2 to transmit rotational power. It is configured as follows.

As shown in FIGS. 1 and 3, the hub 1 connects a left frame member 7 having a left hub collar 1 a, a right frame member 8 having a right hub collar 1 b, and left and right frame members 7, 8. It is constituted by the pipe member 9.

As shown in FIG. 3, the hub brake 10 is a brake configured to be externally fitted to the left housing member 7 and spline-engaged so as to be integrally rotatably connected to one end of the hub 1. A drum 13 and a brake operating unit 10c including a plurality of braking bodies 14 and the like, which are distributed inside the brake drum 13 in the circumferential direction of the brake drum 13, are provided. The brake operating portion 10c includes the braking body 14, a plurality of rollers 15 arranged in the circumferential direction of the brake drum 13 on the inner peripheral side of the braking body 14 in the circumferential direction of the braking drum 14, and as shown in FIG. A brake frame 16 configured to be fixed to the vehicle body so as not to move even when a braking reaction force is applied by a connector 18 configured to be connected to the chain stay S of the frame, and the operation arm 12 and the like. I am doing it. That is, the hub brake 10 is configured as an inner expansion type brake so that the braking body 14 acts on the inner surface side of the brake drum 13 that rotates around the rotation axis X together with the hub 1, and is shown in FIG. As described above, the brake wire W connected to the operation arm 12 via the wire connection tool 17 is configured to swing and operate the operation arm 12 around the hub axis to perform the turning operation. That is, when the operation arm 12 is swung in the ON direction from the cutting position OF shown in FIG. 6 by pulling the brake wire W, the brake provided on the base end portion of the operation arm 12 located inside the brake drum 13 is provided. The operation cam 12a rotates in the ON direction around the rotation axis of the brake drum 13. Then, the cam surface portion 12b of the brake operation cam 12a presses the roller 15 toward the braking body 14, so that the brake operation cam 12a moves the braking body 14 through the roller 15 to the inner circumference of the brake drum 13. Operate pressure on the surface. At this time, the brake frame 16 is connected to the chain stay portion S of the vehicle body frame by the connecting tool 18 as shown in FIG. 2 and fixed so as not to rotate around the hub axis, and the roller 15 is accommodated. The detent pin portion 19a extending from the roller case 19 is inserted into the pin hole 16a of the brake frame 16 as shown in FIG. 7, and the roller case 19 is locked to the brake frame 16 via the detent pin portion 19a. Further, since the roller 15 enters the recess 14a of the braking body 14 as shown in FIG. 6 to lock the braking body 14, even if the braking body 14 is pressed against the brake drum 13. , The brake drum 13 does not rotate and the brake frame 16 does not move even when a braking reaction force is applied, so the brake is applied. When the brake wire W is loosened from this state, the operation arm 12 returns to the cutting position OF because of the return spring 20, the brake operation cam 12a returns to the rotating position of FIG. 6, and the cam surface of the brake operation cam 12a moves. When the portion 12b releases the pressing operation on the roller 15, the brake operation cam 12a releases the pressure contact of the braking body 14 with the brake drum 13. Then, the brake body 14 is separated from the inner peripheral surface of the brake drum 13 due to the brake body return spring 21, and the brake is released.

The brake drum 13 is provided with a radiating fin 22 made of aluminum metal so that the radiating fin 22 can quickly remove frictional heat generated during brake operation.

As shown in FIGS. 3 to 5, the outer diameter D1 of the brake drum 13 is formed to be larger than the outer diameter D2 of the hub collar 1a, and the same or smaller than the outer diameter D2 of the hub collar 1a. The brake drum 13 has a longer circumference than the above. Thus, the width of the brake drum 13 and the braking body 14 in the axial direction of the brake drum rotation axis is set so that the brake drum 13 and the braking body 14 contact each other over a wide contact area.

As shown in FIG. 3, of the side surfaces of the brake drum 13 that face the hub collar 1 a, the side surface portion 13 a that is located toward the brake drum rotation axis X is substantially aligned with the brake drum rotation axis X. The side surface portion 13b formed on the orthogonal planes and located on the outer peripheral side of the hub collar 1a is separated from the brake drum rotation axis X to the outer peripheral edge side of the brake drum until the outer peripheral edge E is reached. It is formed on an inclined surface that is offset to the left and right center side. The thickness T1 of the brake drum 13 on the side surface portion 13b on the outer peripheral side is formed to be thicker than the thickness T2 of the brake drum 13 on the side surface portion 13a on the rotation axis side. That is, the brake body 14 is pressed against the cylindrical portion 13c of the brake drum 13 during the brake operation, but the brake drum 13 firmly receives and supports the brake body 14 by virtue of the thick outer peripheral portion. Moreover, in comparison, the brake drum 13 is as light as possible due to the thinness on the rotating shaft core side. Further, although the width of the outer peripheral side portion of the brake drum 13 in the drum rotation axis direction becomes relatively large due to the thick wall, the side surface portion 13b on the outer peripheral side is the inclined surface, so that the hub collar 1a is formed. The hub brake 10 is assembled to the hub 1 along the spokes 6 extending from and close to each other. In addition, since the side surface portion 13a on the side of the rotation axis is the above-mentioned plane, the side surface portion 13a is formed on the inclined surface which is continuous with the side surface portion 13b on the outer peripheral side, compared to the operation cam of the brake 10. The width in the axial direction of the brake drum rotation axis at the inner peripheral side where 12a and the roller 15 are located becomes small. As a result, even if the brake 10 is assembled between the end portions of the vehicle body frames 3 and S and the hub collar 1a, the gap between the end portions of the vehicle body frames 3 and S and the hub collar 1a can be narrowed.

As shown in FIG. 3, by displacing the braking body 14 to the left and right center sides of the hub 1 with respect to the brake operation cam 12a, the outer peripheral side portion of the brake 10 where the braking body 14 is located is The inclined surface portion 11a is biased toward the inner side of the vehicle body with respect to the inner circumferential side portion where the operation cam 12a is located, on the outer peripheral side of the decorative cap 11 forming the lateral outer edge of the brake 10, and the outer peripheral edge side is closer to the vehicle inner side. Has been formed. That is, as shown in FIG. 2, the lateral width of the base end side portion of the chain stay S corresponding to the outer peripheral side portion of the brake is larger than the lateral width of the tip end portion corresponding to the inner peripheral side portion of the brake. However, the inclination of the inclined surface portion 11a prevents the base end side portion of the chain stay S and the brake 10 from interfering with each other, and the front end portion of the chain stay S comes close to the hub collar 1a as much as possible to brake. 10 can be assembled. The side surface portion 13a on the drum rotation axis X side may be formed on a plane substantially orthogonal to the rotation axis X or may be formed on a plane orthogonal to the rotation axis X. . That is, depending on manufacturing and assembly errors, the planes will be orthogonal or nearly orthogonal. Therefore, these are collectively referred to as a plane that is substantially orthogonal to the rotation axis X.

As shown in FIG. 3, the brake frame 16 is provided with a cover portion 16 b which is fitted over the cylindrical portion 13 c of the brake drum 13 so as to cover the brake drum 13. A stopper ring 23 is provided between the cylindrical portion 13c of the drum 13 and the stopper ring 23. The stopper ring 23 is an annular ring having a cut in one position in the circumferential direction. The outer peripheral surface of the brake drum is fitted over almost the entire circumference of the brake drum 13 by the contact with the annular projection 13e as shown in FIG. 8 over the entire circumference of the cylindrical portion 13 and the contact with the projection 16c as shown in FIG. It is configured to prevent 13 from coming out of the cover portion 16b. That is, the stopper ring 23 connects the brake frame 16 and the brake drum 13 so as not to separate them. Since the roller case 19, the roller 15 and the braking body 14 are located between the brake frame 16 and the brake drum 13 and the brake frame 16 and the brake drum 13 are inseparably connected to each other, the roller case 19, The roller 15 and the braking body 14 are held by the brake frame 16 and the brake drum 13. In addition, the roller case 19 is supported by the brake frame 16 due to the locking action of the return spring 24 that acts on the detent pin portion 19a by using the brake frame 16 as a reaction member as shown in FIG. The operation arm 12 is supported by the brake frame 16 by being assembled so as to pass through the through hole 16d of the brake frame 16 as shown in FIG. 7 and by having the return spring 20 engage. The decorative cap 11 is held by the brake frame 16 because the outer peripheral portion 11b is elastically deformed and pressed onto the cover portion 16b. In other words, the brake frame 16 holding the braking body 14, the roller 15, the roller case 19, the operation arm 12, the decorative cap 11 and the like and the brake drum 13 are inseparably connected by the stopper ring 23, so that the brake The drum 13, the braking body 14, and the brake operating portion 10c are connected in a unit state. As shown in FIG. 4, when the spline portion 13d is provided on the inner peripheral portion of the brake drum 13 and the brake drum 13 is connected to the hub 1 from the lateral side, the spline portion 13d of the brake drum 13 causes the spline portion 13d of the hub 1 to move to the left side of the hub 1. The brake drum 13 is integrally rotatably connected to the hub 1 by being externally fitted to the spline portion 7a of the member 7 as shown in FIG. 5 and meshingly engaged. As a result, when the brake 10 is assembled to the hub 1, the entire brake 10 such as the brake drum 13, the braking body 14, and the brake operating portion 10c can be mounted on the hub 1 in a unit state.

The stopper ring 23 forms a sealing labyrinth structure between the cover portion 16b and the brake drum 13 in cooperation with the protrusion 13e over the entire circumference of the cylindrical portion 13c, so that water and dust can be prevented. The inside of the brake drum 13 is prevented from entering from between the cover portion 16b and the brake drum 13.

[Other Embodiments] When the brake drum 13 is connected to the hub 1 by being externally fitted to the hub 1, the brake drum 13 and the hub 1 are connected to the hub 1 as compared with the case of being internally fitted to the hub 1. Although it is advantageous that the connecting structure for connecting 1 and 1 so as to be integrally rotatable can be configured as a compact structure having a small width in the lateral direction of the vehicle body, an internal fitting structure may be adopted. Yes. In addition, the brake drum 13 and the hub 1 are configured to be spline-engaged so that they can be integrally pivoted so that they can be integrally pivoted. In addition, they can be pivotally engaged by a coupling pin to implement various interlocking means. You may. Therefore, these means and the spline portion 13d are collectively referred to as the meshing connecting portion 13d.

In addition to the roller-type inner expansion hub brake, the operation cam presses the brake body against the brake drum via the roller, and also a pair of arc-shaped brake shoes or one band-type brake shoe. The present invention is also applicable to various internal expansion type brakes in which the brake shoe is provided inside the brake drum and the brake shoe is pressed against the inner surface of the brake drum by a rotating cam or swing link. it can . Further, the present invention can be applied to the case where the band type brake body is configured to be wound around the brake drum to perform a braking action.

The hub brake according to the present invention is applicable not only to the rear wheels but also to the front wheels.

It should be noted that reference numerals are added to the claims of the utility model for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a plan view of an entire brake hub for a rear wheel of a bicycle.

[Figure 2] Side view of the entire hub with brake for the rear wheels of the bicycle

FIG. 3 is a sectional view of the hub brake in an assembled state.

FIG. 4 is a sectional view of the hub brake in a non-assembled state.

FIG. 5 is a plan view of the brake assembly portion of the hub.

FIG. 6 is a sectional view of a braking body disposition portion of a hub brake.

FIG. 7 is a side view of a hub brake operation arm arrangement portion.

FIG. 8 is a sectional view of a stopper ring disposition portion of the brake drum.

[Explanation of symbols]

 1 hub 10c brake operation part 13 brake drum 14 braking body 23 stopper ring

Claims (2)

[Scope of utility model registration request] 1. A brake drum (13) integrally rotatably connected to a bicycle hub (1), a braking body (14) braking on the brake drum (13), and the braking body (14). A bicycle hub brake including a brake operating portion (10c) that is pressed into contact with the brake drum (13), the connecting portion (13d) being integrally rotatably engaged with one end of the bicycle hub (1). ) Is provided on the brake drum (13), and a cover portion (16b) fitted on the brake drum (13) is provided on the brake operation portion (10c).
And a stopper ring (23) for preventing the brake drum (13) from coming out of the cover portion (16b) is interposed between the brake drum (13) and the cover portion (16b). A bicycle hub brake in which the brake drum (13), the braking body (14), and the brake operating part (10c) are connected in a unit state. 2. The bicycle hub brake according to claim 1, wherein the connecting portion (13d) is a connecting portion that is fitted onto the bicycle hub (1).