JPH0630636Y2 - Bicycle hub - Google Patents

Description

[Detailed description of the device] [Industrial applications]

The invention is a bicycle configured to operate a switching mechanism to change a power transmission path from a driving body receiving a driving force of an occupant to a hub body so that various traveling modes can be selected. For hubs.

[Prior art]

This type of bicycle hub includes, for example, a bicycle internal transmission, which usually includes a sun gear fixed to a hub shaft and a plurality of sun gears that revolve and rotate about the sun gear while meshing with the sun gear. A so-called planetary gear mechanism consisting of a planetary gear and a plurality of planetary gears and a gear ring (annular gear) that rotates while meshing on the outside of the planetary gear is provided. Rotational force is transmitted through the planetary gear mechanism that is a transmission mechanism. Further, by operating the switching mechanism to move a switching actuating member (clutch) provided so as to be movable in the axial direction with respect to the hub shaft in the axial direction of the hub to change the position in the axial direction of the hub, the planetary gears described above. The power transmission path in the mechanism is changed so that the shift operation can be performed. Further, as shown in FIG. 3 of Japanese Utility Model Publication No. 56-31517, the switching mechanism for moving the switching actuating body in a predetermined direction in the axial direction of the hub generally has an axial penetration of the hub shaft. A control rod slidably inserted in the hole and connected to the switching actuating body, and a bell connected to the control wire at one end and at the other end to the control rod and swung by a control wire pulling operation. It is often configured with a crank. In this switching mechanism, the control wire can be pulled to swing the bell crank, thereby axially moving the control rod and moving the switching actuating body in the hub axial direction. .

[Problems to be solved by the device]

However, such a conventional general switching mechanism has the following problems. That is, since the pivot point of the bell crank is provided in front of the hub axle, the outer wire receiver of the control wire that is introduced and connected to one end of the bell crank from the front is arranged further in front of the pivot point. The structure of the outer wire receiver or the bell crank mechanism is enlarged in the front-rear direction. In addition, since a motion transmission path is taken from the control wire to the bell crank connected to the control wire, the bell crank to the control rod connected to the bell crank, and the control rod to the switching actuating body, the mechanism becomes very complicated. . In addition, when the bicycle falls, the bell crank located at the end of the transmission in the axial direction of the hub comes into direct contact with the ground, which may cause a failure due to damage to the bell crank. is there. In addition, as a method of easily configuring the switching mechanism, the operation cable is inserted into the axial through hole of the hub shaft and one end thereof is connected to the switching operation body, and the operation cable is operated by operating the operation lever or the like. It is conceivable that the switching operation body can be moved in the hub shaft direction by pulling the switch. However, even in this case, when the bicycle falls, the operation cable exposed from the hub axle end is pressed against the hub axle end and comes into contact with the ground. Similarly, there is a problem that the switching mechanism is liable to malfunction. The present invention has been devised under the circumstances as described above, and a power transmission path from a driving body to a hub body is operated by operating a switching mechanism like the above-mentioned bicycle internal transmission. In a bicycle hub configured to change various driving modes, the switching mechanism can be configured with a simple structure, and the switching mechanism can be prevented from malfunctioning even when the bicycle falls over. The purpose is to be able to.

[Means for solving the problem]

In order to solve the above problems, the present invention takes the following technical means. That is, a hub body that is rotatably supported by a hub shaft having an axial through hole, and a drive that is rotatably supported by the hub shaft on one side of the hub body and that receives a driving force from a passenger. And a switching actuating member, which is movably supported in the axial direction with respect to the hub shaft, the position in the hub axial direction is changed to change the power transmission path from the driving body to the hub body. In the bicycle hub including the switching mechanism, a cable guide that is supported at the hub shaft end and has a predetermined length in the hub shaft direction is provided, and the cable guide has a cylindrical outer cable and an inner cable. The double cable inserted is introduced from the side, and the outer cable receiving the outer cable is supported, and the inner cable is inserted from the outer cable receiving portion into the axial through hole of the hub shaft. While and a inner through insertion hole for introducing the Le, the switching operation body are substantially connected to the inner cable which is introduced into the axial through hole.

[Action and effect]

By connecting the other end of the inner cable whose one end side is connected to the switching operation body to an operation lever or the like attached to an appropriate portion of the bicycle frame such as a handle, it is possible to pull the inner cable through the operation of the operation lever. The pulling operation of this inner cable can move the switching actuator in the hub axis direction to change the position of the switching actuator in the hub axis direction and the power transmission path from the driving body to the hub body. it can. That is, according to the present invention, the switching mechanism indispensable for changing the power transmission path can be configured with a simple structure in which the cable is simply connected to the switching operation body. By the way, when the cable is inserted into the hub axle in this way, the cable exposed from the hub axle end comes into contact with the ground when it is pushed against the hub axle end when the bicycle falls, and for this reason the cable There is a risk that cutting and the resulting inoperability of the switching mechanism will result. However, in the case of the present invention, the cable connected to the switching actuator is passed through the cable guide supported at the end of the hub axle, inserted into the axial through hole of the hub axle, and then inserted into the cable guide. Is introduced from its side surface, that is, from an intermediate portion of the cable guide in the hub axial direction. Therefore, when the bicycle falls, the end of the cable guide provided at the end of the hub axle may come into contact with the ground, but the cable is prevented from coming into contact with the ground, so that the above fear is eliminated. Moreover, since the cable guide has a predetermined length in the hub axis direction, the foot can be easily placed on the cable guide.
Therefore, for example, Bicycle Motocross (BM
X) In freestyle events of competition, running performance may be performed while standing near the end of the hub axle as a scaffold after the poor footing, but when the present invention is applied to the hub of BMX car, There is also an advantage that it is easier for the athlete to perform because the athlete can use the cable guide with a good footstep as a step (scaffold). Similarly, when a person gets on the luggage carrier, the cable guide can be used as a step, and the cable guide has both the cable protection function and the step function as described above. In addition, even in this case, the cable inserted into the hub axle is protected by the cable guide, and there is no inconvenience that the cable is stepped on and bent by the foot. Also, when using a double cable, it is necessary to provide an outer cable receiver for supporting the outer cable, but in the case of the present invention, since the cable guide is provided with an outer receiver portion for supporting the outer cable, It is not necessary to newly attach the outer cable receiver, and the number of parts can be reduced when constructing the switching mechanism.

[Explanation of Examples]

Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings. FIGS. 1 and 2 show a first embodiment in which the present invention is applied to an internal bicycle transmission. As shown in FIG. 1, the internal bicycle transmission has a hub axle 1
Of the sun gear 2, which is fixed to the central portion in the axial direction, and a plurality of planetary gears 3 that revolve and rotate around the sun gear 2 while meshing with the sun gear 2. A planetary gear mechanism 5 including a gear ring 4 is provided. The rotational force is transmitted to the hub body 8 from the drive body 15 that is rotatably supported by the hub shaft 1 and receives the drive force from the occupant through the gear mechanism 5. . Each of the plurality of planetary gears 3 is rotatably supported by a bottom wall 6a of a substantially bottomed cylindrical gear frame 6 via a pivot pin 7, and is equidistant in the circumferential direction of the gear frame 6. It is arranged to open. Further, on the outer periphery of the tubular portion 6b of the gear frame 6, a first ratchet pawl 11 that constitutes a first ratchet mechanism 10 in cooperation with a ratchet tooth row 9 formed on the inner peripheral left end of the hub body 8. Are oscillatably supported in two diametrically opposite positions of the hub body 8 while being urged in the upright direction. The first ratchet mechanism 11 allows the hub body 8 to move relative to the gear frame 6. It is configured so that only forward rotation is possible. On the other hand, the gear ring 4 includes an internal gear portion 4a whose inner periphery meshes with the planetary gear 3 and a tubular portion 4b extending from the internal gear portion 4a in the hub axial direction. A second ratchet pawl 14 that forms a second ratchet mechanism 13 in cooperation with the ratchet tooth row 12 formed at the right end of the inner circumference of the hub body 8 is provided on the outer circumference of the tubular portion 4b. The second ratchet mechanism 1 is rotatably supported while being biased in the standing direction at two locations facing each other in the diametrical direction.
3, the hub body 8 is configured to be capable of only the normal forward rotation with respect to the gear ring 4. A clutch 16 as a switching actuating body is slidably inserted into the hub axle 1 on the side of the bottom wall 6a of the gear frame 6 so as to be slidable in the hub axle direction. The clutch 16
Can rotate with the drive body 15 when it rotates, and can move relative to the drive body 15 in the hub axial direction for a predetermined stroke. Then, in the bicycle internal transmission,
By changing the position of the clutch 16 in the hub shaft direction, the power transmission path from the drive body 15 to the hub body 8 in the planetary gear mechanism 5 is changed, and the gear shift operation is performed. That is, when the clutch 16 takes the position in the hub axial direction in which it engages with the projecting end 7a of the pivot pin 7 as shown in FIG. 1, the sprocket wheel 17 is normally rotated to drive the drive body 15 normally. Then, the gear frame 6 is normally rotated via the clutch 16. At this time, since the gear ring 4 rotates faster than the gear frame 6, the rotation of the gear ring 4 is transmitted through the second ratchet mechanism 13, and the hub body 8 rotates faster than the sprocket wheel 17. It becomes (high position). When the clutch 16 is moved to the right side from the state shown in FIG. 1 and the clutch 16 is set to the hub axial position where the clutch 16 engages with the engaging groove 4c provided on the inner circumference of the tubular portion 4b, the sprocket wheel 17 is moved. When the driving body 15 is driven to rotate in the normal direction, the driving force is first transmitted to the gear ring 4 via the clutch 16. At this time, the rotation of the gear ring 4 also rotates the gear frame 6, but since the rotation of the gear ring 4 is faster than the rotation of the gear frame 6, the rotation of the gear ring 4 is transmitted to the hub body 8 via the second ratchet mechanism 13. As a result, the hub body 8 rotates at the same rotation speed as the sprocket wheel 17 (normal position). When the clutch 16 is further moved to the right and the positions of the second ratchet pawl 14 and the second ratchet pawl 14 in the axial direction of the hub are aligned with each other, the rear end of the second ratchet pawl 14 is pushed up by the clutch 16 to make it inoperable. Get burned. At this time, the clutch 16 is still engaged with the engagement groove 4c, and the sprocket wheel 17 is normally rotated to drive the drive member 15
When the clutch 16 is driven in the normal direction, the driving force is the same as the above.
Although the second ratchet mechanism 13 does not operate, the rotation of the gear frame 6 is transmitted to the hub body 8 via the first ratchet mechanism 10, and the gear frame 6 is transmitted to the gear ring 4 via the gear ring 4. Since the hub body 8 rotates at a lower speed than that of the sprocket wheel 17, the hub body 8 rotates at a lower speed than the sprocket wheel 17 (low position). Now, in the present invention, the cable guide 22 is attached to the end portion of the hub axle 1. In the case of this example, the cable guide 22 is made of a cylindrical body having a predetermined length in the hub axis direction, and a screw hole 23 that is screwed into the screw shaft 1b of the hub shaft 1 is formed at one end portion thereof. Also, the cable guide 22
Has a cable introduction hole 24 for introducing the double cable W into the inside thereof.
Outer receiving portion 25 for supporting the end portion of outer cable W1 of double cable W introduced inside, and inner cable W2 is introduced from this outer receiving portion 25 into axial through hole 1a of hub axle 1. An inner insertion hole 26 communicating with the screw hole 23 is provided. As shown in FIG. 1, the cable guide 22 is attached by screwing the screw hole 23 into the screw shaft 1b of the hub shaft 1, and the outer cable W1 of the double cable W is attached.
Is introduced into the cable guide 22 from the cable introduction hole 24 and supported by the outer receiving portion 25, and the inner cable W2 is inserted into the inner insertion hole 26 or the axial through hole 1a of the hub axle 1. Of. Then, the inner cable W2 inserted into the hub shaft is connected to the clutch 16 to form the switching mechanism 20 for changing the position in the hub shaft direction. In the case of this example, the inner cable W2 and the clutch 16 are
The hub shaft 1 is slidably supported in a key hole 18 opened in the axial direction with a predetermined length, and is connected via a key 19 that engages with a clutch sleeve 16 a of the clutch 16. In the figure, reference numeral 21 is an inner cable W.
It is a nipple for fixing 2. Further, the other end of the inner cable W2 is connected to an operation lever (not shown) provided at an appropriate portion of the bicycle frame such as a handle, so that the inner cable W2 is operated through the lever operation.
To be able to pull 2 When the cable installation is completed, the rotational position of the cable guide 22, that is, the direction of the cable introduction hole 24 is adjusted, and then the lock nut 27 is tightened to tighten the cable guide 22.
Is firmly fixed to the hub axle 1. In this case, it is preferable that the cable introduction hole 24 be directed forward in the front-rear direction in consideration of the wiring direction of the cable W.
Further, in the case of this example, as shown well in FIG. 2, by forming the end portion of the cable guide 22 into a hexagonal shaft shape, the hexagonal shaft portion can be used as a tool contact portion, The hub shaft 1 can be easily screwed. In the bicycle internal transmission of this example configured as described above, the clutch 16 is moved to the right in the hub axis direction in FIG. 1 by operating the operation lever to pull the inner cable W2. The hub axial position can be changed. As a result, the power transmission path in the planetary gear mechanism 5 can be changed to perform the gear shift operation as described above. If the operating force on the operating lever is released, the clutch 16 is returned to the position shown in FIG. 1 by the urging force of the compression coil spring 28. Further, as described above, in the present embodiment, the switching mechanism 20 for changing the position of the clutch 16 in the hub shaft direction is constituted by a simple structure in which the cable W2 is connected to the clutch 16, so that the bell crank mechanism or the like is used. Therefore, the structure of the switching mechanism does not become complicated unlike the conventional general bicycle internal transmission in which the switching mechanism is configured by. By the way, when the cable is inserted into the hub axle, the cable exposed from the end of the hub axle may be damaged by contact with the ground when the bicycle falls, but in this example, the cable W is the cable. It is inserted into the hub shaft via the guide 22, and is introduced into the cable guide 22 through a cable introduction hole 24 provided at an intermediate portion in the hub shaft direction. Therefore, even if the end of the cable guide 22 comes into contact with the ground when the bicycle falls,
It is possible to prevent the cable W from coming into contact with the ground, and solve the above-mentioned problems. Further, since the cable guide 22 that exhibits the protector function for the cable W has a constant length in the hub axis direction,
For example, it can be effectively used as a scaffold (step) when a person gets on the platform. In addition, in the illustrated example, the cable guide 22 is provided only on one end side of the hub shaft 1. However, when the cable guide 22 is effectively used as a step as described above or when the appearance is taken into consideration, the hub is not provided. A cable guide 22 may be provided on the other end side of the shaft 1. Further, in this example, as shown in FIG.
By further extending the tip of the inner cable W2 to be inserted therein from the hub shaft end, the inner cable can be easily replaced and the nipple 20 can be easily taken out when the inner cable is cut halfway. . That is, the inner cable W2 and the nipple 20 can be easily pulled out from the hub shaft 1 by pulling the tip end portion of the inner cable W2 exposed from the hub shaft end. FIG. 3 shows a second embodiment of the present invention. The illustrated bicycle hub of the present example is capable of swinging while urging the first ratchet pawl 29 and the second ratchet pawl 30 in the opposite direction to the tubular extension 15a of the drive body 15 in the standing direction. The inner circumference of the hub body 8 is
A ratchet tooth row 31 that can be engaged with both the first ratchet pawl 29 and the second ratchet pawl 30 is formed.
The first ratchet pawl 29 and the ratchet tooth row 31 constitute a first ratchet mechanism 32 that allows the hub body 8 to rotate relative to the drive body 15 only in one direction, that is, in the forward rotation direction in this example. And the second ratchet claw 3
0 and the ratchet tooth row 31, the hub body 8 is driven 15
On the other hand, the second ratchet mechanism 33 is configured to be relatively rotatable only in the reverse direction. In addition, a switching actuator 34 having a substantially donut disk shape is inserted into the hub shaft 1 so as to be slidable in the hub shaft direction. When the ratchet pawls 29 and 30 are aligned with the hub axial position, the switching actuating body 34 forcibly pushes up the bottom of the ratchet pawls 29 and 30 to render the ratchet pawl inoperable. Therefore, as shown in the figure, when the switching actuating body 34 pushes up the bottom portion of the first ratchet pawl 29 to make it inoperable, only the second ratchet mechanism 33 is in an operable state. That is, the hub body 8 is the drive body 1.
Relative rotation only in the reverse direction is allowed with respect to 5, and
Since only the reverse rotation of the driving body 15 is transmitted to the hub body 8, the bicycle can be propelled backward. On the other hand, when the switching actuating body 34 is moved to the right in the hub shaft direction from the state shown in the drawing so that the positions of the switching actuating body 34 and the second ratchet claw 30 coincide with each other in the hub axial direction, only the first ratchet mechanism 32 is turned on. Is activated. That is, since the hub body 8 is allowed to rotate relative to the drive body 15 only in the forward rotation direction, and only the rotation of the drive body 15 in the forward rotation direction is transmitted to the hub body 8, the hub body 8 is like a normal bicycle. In addition, the bicycle can be propelled forward. Thus, in the bicycle hub of this example, by changing the position of the switching actuator 34 in the hub axial direction, it is possible to select a state in which the bicycle can be propelled forward and a state in which the bicycle can be propelled backward. Further, in this example, the switching mechanism 20 for performing such a mode change is configured as follows according to the present invention to simplify the structure thereof. That is, similarly to the first embodiment, the cable guide 22 is screwed and supported on the screw shaft 1b of the hub shaft 1,
A double cable W is introduced into the cable guide 22 through the cable introduction hole 24. The outer cable W1 is supported by the outer receiving portion 25,
The inner cable W2 is inserted through the inner insertion hole 26 or the axial through hole 1a of the hub axle 1. The inner cable W2 inserted into the axial through hole 1a comes into contact with and pushes the left side surface of the switching actuating body 34, and the key 3 slidably supported in the key hole 36 of the hub axle 1.
It is connected to 5. Therefore, by pulling the inner cable W2, the position of the switching actuator 34 in the hub axis direction is changed,
A state in which the bicycle can be propelled forward and a state in which the bicycle can be propelled backward can be selected as appropriate, and when the operating force is released, the switching actuating body 34 changes the compression coil spring 3
It is moved back to the position shown in FIG. In addition, since the cable W is protected by the cable guide 22 as in the first embodiment, there is no problem that the cable W is damaged when the bicycle falls. By the way, a bicycle hub configured to be able to select a state in which it can be propelled forward and a state in which it can be propelled backward is dynamic when equipped in a BMX vehicle used in a freestyle event of bicycle motocross competition. It becomes possible to perform a variety of running performances. Further, in this case, the cable guide 22 can be effectively used as a scaffold when a competitor stands up on a bicycle while running. Next, FIG. 4 shows a third embodiment. The bicycle hub of the present example includes a ratchet support 38 that is supported by the drive body 15 or the hub axle 1 so as to be slidable in the hub axis direction and non-rotatable relative to the drive body 15. A first ratchet claw 39 and a second ratchet claw 40 opposite to the first ratchet claw 39 are oscillatably supported at two positions separated from each other in the hub axial direction on the outer circumference while biasing in the upright direction. . On the other hand, on the inner circumference of the hub body 8, a convex annular sliding contact portion 41 that cannot engage with the ratchet pawls 39, 40 is formed, and the annular sliding contact portion 41 has a left side in the hub axial direction. Includes a ratchet tooth row 42a having a predetermined width in the hub shaft direction with which the first ratchet pawl 39 engages, and a hub shaft with which the second ratchet pawl 40 engages on the right side of the annular sliding contact portion 41 in the hub axial direction. Ratchet tooth rows 42b each having a predetermined width in the direction are provided. The first ratchet pawl 39 and the ratchet tooth row 42a constitute a first ratchet mechanism 43 that allows the hub body 8 to rotate relative to the drive body 15 only in one direction, that is, in the forward rotation direction in this example. , The second ratchet pawl 40 and the ratchet tooth row 42b, the hub body 8
A second ratchet mechanism 44 is configured to allow relative rotation with respect to the driving body 15 only in the reverse direction. The position of the second ratchet pawl 40 in the hub axial direction is the annular sliding contact portion 4.
4, the second ratchet mechanism 44 is in the inoperative state, and the first ratchet pawl 3
9 engages with the ratchet tooth row 42a, and only the first ratchet mechanism 43 functions. In this case, the hub body 8 can rotate relative to the drive body 15 only in the forward rotation direction, and since the driving force of the drive body 15 only in the forward rotation direction is transmitted to the hub body 8, the bicycle can be propelled forward. . On the other hand, when the ratchet support 38 is moved to the right in the hub axial direction so that the position of the first ratchet pawl 39 in the hub axial direction coincides with the annular sliding contact portion 41, the first ratchet mechanism 43 becomes inoperative, and the second ratchet mechanism 43 becomes inoperative. The ratchet pawl 40 engages with the ratchet tooth row 42b so that only the second ratchet mechanism 44 functions. In this case, the hub body 8 can rotate relative to the drive body 15 only in the reverse direction, and the driving force of the drive body 15 only in the reverse direction is transmitted to the hub body 8 so that the bicycle can be propelled backward. Of. Thus, the switching mechanism 20 for moving the ratchet support 38 in the hub axial direction to change the position of the ratchet pawls 39, 40 in the hub axial direction is constituted by the present invention. That is, the cable guide 22 is screwed and supported on the screw shaft 1b of the hub shaft 1, and the inner cable W2 of the double cables W introduced into the cable guide 22 is
It is inserted through the inner through hole 26 or the axial through hole 1 a of the hub shaft 1. On the other hand, in the hub shaft direction slide hole 45 of the hub shaft 1, a pusher body 46, which is a switching operation body that abuts against the left side surface of the ratchet support body 38 to push the ratchet support body 38, is slidably supported in the hub axis direction. The inner cable W2 inserted in the hub axle 1 is connected to the pusher 46. Therefore, by pulling the cable W, the ratchet support 38 can be moved to the right in the hub axial direction, and the hub axial positions of the ratchet pawls 39 and 40 can be changed. That is, as described above, the state in which the bicycle can be propelled forward and the state in which the bicycle can be propelled backward can be selected. Also in this example, it is needless to say that the cable W can enjoy the protective action of the cable guide 22 as in each of the above-described examples. By the way, the scope of the present invention is not limited to the above-described embodiments. For example, the cable guide 22 may have various forms. As shown in FIG. 5, one end of the cable introduction hole 24 provided on the side surface is extended to the end of the cable guide 22 in the hub axial direction to be opened. As a result, the simplicity of the work when inserting the cable W into the cable guide 22 can be enhanced. Further, as shown in FIGS. 6 and 7, if the receiving surface 25a of the outer receiving portion 25 is formed so as to extend in the hub axial direction, the wiring direction of the outer cable W2 can be made straight. Further, in this case, in order to simplify the cable insertion work, an inner introduction hole 47 for introducing the inner cable W2 into the cable guide may be provided on the side surface of the cable guide 22, and further,
When the inner cable guide surface 48 having a smooth curved surface is provided from the outer receiving portion 25 to the inner insertion hole 26, the cable indexing operation can be performed more smoothly. Even in this case, as shown in FIG.
If one end of the inner introducing hole 47 is opened, the cable insertion work is further simplified. In addition, the design of the attachment means of the cable guide to the hub shaft, the connecting structure of the switching actuator and the inner cable, and the like can be changed in various ways other than the above-described embodiment.

[Brief description of drawings]

FIG. 1 is a sectional view of the first embodiment of the present invention, FIG. 2 is a perspective view of a cable guide according to the first embodiment, FIG. 3 is a sectional view of the second embodiment, and FIG. FIG. 5 is a sectional view of a third embodiment, FIGS. 5 and 6 are perspective views of a cable guide of another embodiment, and FIG. 7 is a sectional view of a portion A in FIG. 1 ... Hub shaft, 1a ... Axial through hole, 8 ... Hub body,
15 ... Driving body, 16 ... Switching actuating body (clutch),
20 ... Switching mechanism, 22 ... Cable guide, 25 ...
Outer receiving part, 26 inner insertion hole, 34 switching body, 46 switching body (pushing body), W double cable, W1 outer cable, W2 inner cable.

Claims (1)

[Scope of utility model registration request] 1. A hub body that is rotatably supported by a hub shaft having an axial through hole, and a rotatably-supported hub member on one side of the hub body that is rotatably supported by the hub shaft. And a switching body supported axially movably with respect to the hub shaft to change the power transmission path from the drive body to the hub body. In a bicycle hub having a switching mechanism configured as described above, a cable guide supported on the hub shaft end portion and having a predetermined length in the hub shaft direction is provided, and the cable guide is a tubular outer cable. A double cable formed by inserting the inner cable is introduced from the side, and the outer cable receiving portion supports the outer cable, and the inner cable is inserted from the outer cable receiving portion to the axial through hole of the hub axle. While and a inner through insertion hole for introducing the table, the switching operation body, characterized in that it is substantially coupled to the inner cable which is introduced into the axial through hole, a bicycle hub.