JPS6222401Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention provides a bicycle hub, more specifically, a support cylinder having a large number of axially uneven stripes around the outer periphery of the base at one end in the axial direction of the hub body, and in this support cylinder, A freewheel consisting of a driven cylinder having an internal groove and groove that fits into the groove and a drive cylinder that is supported by the driven cylinder via a one-way rotation transmission mechanism and has at least one sprocket on its outer periphery. The present invention relates to a bicycle hub supported by fitting the driven tube into the support tube.

Conventionally, in various types of bicycle hubs, the structure of connecting the driven tube to the support tube is to fit the grooves and grooves provided on each tube, and also to fit the grooves provided on the inner surface of the driven tube and the outer surface of the support tube to the support tube of the driven tube. The two joints were to be joined by forming a strongly joined joint by press-fitting the two joints.

Therefore, when it is necessary to remove the driven tube from the support tube, a special tool is required in order to separate the two strongly joined joints, which makes the detachment work troublesome. When manufacturing, it is necessary to form the joint on both cylinders through a step, which deteriorates workability and requires dimensional accuracy of the joint between both joints in order to join them with a predetermined joint strength. There was a problem in that the overall cost was high.

Therefore, the present invention was devised to solve the above problems, and the purpose is to be able to firmly connect the supporting tube and the driven tube, while also making it possible to easily remove the driven tube from the supporting tube. Another object of the present invention is to provide a bicycle hub that can be easily manufactured without requiring the supporting tube and the driven tube to have a complicated stepped structure for joining or to increase the dimensional accuracy of joining.

That is, in the present invention, a support cylinder is provided at one end in the axial direction of the hub body, and a support cylinder is provided with a large number of axially uneven lines around the outer periphery of the base, and the support cylinder is fitted with the uneven lines on the inner side of the base end. It has a driven cylinder with a concave and convex strip inside, a threaded part on the inner periphery of one side in the axial direction that is screwed into the tip of the driven cylinder, an outer bearing surface on the outer periphery of this threaded part, and an inner bearing surface on the other side in the axial direction. a bearing cylinder having an inner bearing surface on its circumferential surface;
A freewheel consisting of an inner bearing, an outer bearing, and a drive barrel supported via a one-way rotation transmission mechanism and having at least one sprocket on the outer periphery is attached to the bearing barrel and the driven barrel. In the bicycle hub supported by fitting into the support tube, the driven tube can be loosely inserted into the support tube, and the length between each bearing surface of the bearing tube is lengthened so that the tip of the driven tube is An annular space is formed between the surface and the inner bearing surface of the bearing tube, while the tip of the support tube is extended outward from the tip of the driven tube, and this extended portion protrudes into the annular space. At the same time, a screw is provided on the outer periphery of the extension part, and a lock ring having a rotation operation part on the outer surface in the axial direction and installed inside the annular space is screwed onto the thread part, so that the lock ring that is loosely inserted into the support tube is screwed onto the threaded part. It is characterized in that the driven cylinder is fixed to the support cylinder.

The details of the present invention will be explained below based on the drawings showing embodiments.

What is shown in the drawing is a quick release hub. In the drawing, 1 is a hub shaft, 2 is a hub barrel through which the hub shaft 1 is inserted, and one left end of the hub barrel 2 is connected to a ball receiver 3, While being freely rotatably supported on the hub shaft 1 via a ball 4 and a ball pusher 5, a support cylinder 7 having a large number of axially uneven stripes 6 around the outer periphery of the base is fixed to the other end of the hub body 2. This support tube 7 is supported by a driven tube 9 which has a concavo-convex strip 8 that fits into the concave-convex strip 6 inside the base end thereof, and a one-way rotation transmission mechanism 10 and a ball 11 to the driven tube 9. , and a driving cylinder 13 having a sprocket 12 on its outer periphery.
The drive cylinder 13 is supported by fitting into the drive cylinder 13.
The ball 14 has a threaded part 24 on the inner periphery of one side in the axial direction that is threaded onto the right end of the driven pipe 9, and an outer threaded part 24 on the outer periphery of the threaded part 24. A bearing cylinder 15 having a bearing surface 25 and an inner bearing surface 26 on the inner peripheral surface on the other side in the axial direction, and a ball 1.
6. It is rotatably supported on the hub shaft 1 via a ball pusher 17 screwed onto the hub shaft 1. Further, the hub tube 2 and the support tube 7 are provided with hub flanges 18, 18, respectively.

The one-way rotation transmission mechanism 10 includes the drive cylinder 1
Serrated teeth 10a on the inner surface between the balls 11 and 14 of No. 3
At the same time, a claw 10 is formed on the outer surface of the driven surface 9.
b is provided, and when the drive cylinder 13 rotates in the forward direction, the pawl 10b
is engaged with the serrated teeth 10a, so that the driving force of the drive cylinder 13 is transmitted from the driven cylinder 9 to the hub flanges 18, 18 via the support cylinder 7 and the hub body 2.

Therefore, in the bicycle hub configured as described above, the present invention allows the driven tube 9 to be loosely inserted into the support tube 7, and also to reduce the length between the bearing surfaces 25 and 26 of the bearing tube 15. The supporting cylinder 7 is lengthened to form an annular space S between the leading end surface of the driven cylinder 9 and the inner bearing surface 26 of the bearing cylinder 15.
The distal end of the driven tube 9 is extended outwardly from the distal end of the driven cylinder 9, and this extended portion is projected into the annular space S. A threaded portion 19 is provided on the outer periphery of the extended portion, and the threaded portion 19 has an axial direction. The driven cylinder 9, which is loosely inserted into the support cylinder 7, is fixed to the support cylinder 7 by screwing a lock ring 21 which has a rotation operation part 20 on the outer surface and is installed inside the annular space S.

As shown in FIGS. 1 and 2, the driven tube 9 is provided with the uneven strip 8 on the left end side of its inner surface, and the right side of the uneven strip 8 is parallel to the axial direction via a step facing inward in the radial direction. This creates a small diameter portion 9a with no steps and a circumferential surface.

Further, as shown in FIGS. 1 and 2, the support tube 7 has the uneven strip 6 formed at the base of its outer surface to fit into the uneven strip 8, and the right side of the uneven strip 6 is directed radially inward. A small diameter part 7a without a step is formed parallel to the axial direction and has a circumferential surface slightly smaller than the small diameter part 9a, and the small diameter part 7a is connected to the small diameter part 9a of the driven cylinder 9. It is made to protrude to the right from the right end surface of.

Note that the right end of the driven cylinder 9 and the lock ring 21
An elastic body such as a rubber plate or a spring is interposed between the axially inner surface of the driven cylinder 9 and the support cylinder 7 to prevent the lock ring 21 from loosening. preferable. Further, in the figure, 22 is a rod, and 23 is a lock nut for the ball pushers 5 and 17.

In the above configuration, in order to attach the freewheel A to the support tube 7 fixed to the hub tube 2, the driven tube 9 of the freewheel A is loosely inserted into the support tube 7 and the uneven strips 6, 8 are fitted. In addition to matching,
The lock ring 21 is brought into pressure contact with the right end surface of the driven cylinder 9 by operating the rotary operation section 20 on the screw 19 provided on the outer periphery of the tip end of the support cylinder 7.

In this way, the freewheel A is attached to the support tube 7 by fitting the uneven strips 6 and 8 and locking the lock ring 21.
The work can be completed quickly, and the driven tube 9 is securely fixed to the support tube 7 by supporting both ends.

In addition, when removing the driven tube 9 of the freewheel A from the support tube 7 for replacement etc., the ball pusher 17,
After removing the ball 16 and other items on the right side of the lock ring 21, the lock ring 21 is removed from the screw 19 of the support tube 7 by operating the rotation operation unit 20, and then the freewheel A is pulled to the right. This can be done by disengaging the concavo-convex strips 6 and 8 from each other.

As described above, the removal of the freewheel A from the support tube 7 is a simple task of removing the lock ring 21 and unfitting the uneven strips 6 and 8, and the work can be completed easily and quickly, improving serviceability. can be significantly improved.

In addition, the support tube 7 and the driven tube 9 have small diameter portions 7a, 9a with no step on the circumferential surface parallel to the axial direction via the stepped portion on the right side of the uneven stripes 6, 8, so the small diameter portion 7a, Manufacturing by cutting 9a is extremely easy, and since the small diameter portions 7a and 9a are not fitted together but have a space between them, there is no need to increase dimensional accuracy.

The number of sprockets 12 may be one or more.

In addition, although the above explanation is applied to the Quits Clerys hub, the support tube 7, which is provided at one axial end of the hub tube 2 and has a base outer periphery and a large number of uneven strips 6 in the axial direction, A free drive cylinder 13 consisting of a driven cylinder 9 having a grooved line 8 therein which fits into the grooved line 6, and a drive cylinder 13 supported by the driven cylinder 9 via a one-way rotation transmission mechanism 10 and having a sprocket 12 on its outer periphery. The foil A can be applied to various types of objects that are supported by fitting the driven tube 9 into the support tube 7.

As described above, the driven tube of the freewheel can be loosely inserted into the support tube provided at one end in the axial direction of the hub body, and the length between the respective bearing surfaces of the bearing tube is lengthened so that the tip of the driven tube can be loosely inserted. forming an annular space between the surface and the inner bearing surface of the bearing tube, while extending the tip of the support tube outward from the tip of the driven tube;
The extension part is inserted into the annular space, and a screw is provided on the outer periphery of the extension part, and a locking ring having a rotary operation part on the outer surface in the axial direction and installed inside the annular space is screwed into the thread part. do,
Since the driven tube, which is loosely inserted into the support tube, is fixed to the support tube by fitting with each other by the uneven stripes, the driven tube is fixed to the support tube by the uneven fitting and the driven tube. This can be done reliably by simply tightening the lock ring from the tip of the support tube to the tip of the tube, and detaching the driven tube from the support tube involves loosening the lock ring and removing it from the tip of the support tube, and removing the lock ring from the tip of the support tube. This can be done simply by pulling out the driven tube from the support tube to unmate the
Serviceability such as freewheel replacement can be improved.

Moreover, since the driven cylinder can be loosely inserted into the supporting cylinder without being press-fitted, there is no need to form a step for press-fitting on the circumferential surface of each cylinder facing the loose insertion. There is no need to increase dimensional accuracy, and both cylinders can be manufactured easily.

Moreover, an annular space is formed between the leading end surface of the driven cylinder and the inner bearing surface of the bearing cylinder, and the leading end of the supporting cylinder is extended outwardly from the leading end of the driven cylinder, and this extension is connected to the annular space. Since the lock ring is inserted into the space and the lock ring is screwed onto the hub, the lock ring can be incorporated into the hub with a simple structure and the hub cylinder can be supported on the hub axle without increasing the size of the hub. be.

[Brief explanation of the drawing]

FIG. 1 is a partially sectional explanatory view showing an embodiment of the present invention, and FIG. 2 is an enlarged explanatory view of the main part thereof. 2... Hub tube, 6, 8... uneven shape, 7... support tube, 9... driven tube, 10... one-way rotation transmission mechanism, 12... sprocket, 13... drive tube, 1
9...screw, 20...rotary operation section, 21...lock ring, A...freewheel, 15...bearing cylinder, S...annular space.

Claims (1)

[Scope of utility model registration request] A support cylinder is provided at one end in the axial direction of the hub body, and a support cylinder is provided with a large number of axially uneven lines around the outer periphery of the base, and an uneven line that fits into the uneven lines is provided inside the base end of the support cylinder. It has a driven cylinder, and a threaded part on the inner periphery of one side in the axial direction to be screwed into the tip of the driven cylinder, an outer bearing surface on the outer periphery of this threaded part, and an inner bearing surface on the inner peripheral surface on the other side in the axial direction. A free drive tube comprising a bearing tube having a bearing tube and a driving tube supported by the bearing tube and the shaft-driving tube via an inner bearing, an outer bearing, and a one-way rotation transmission mechanism, and having at least one sprocket on the outer periphery. In a bicycle hub in which a wheel is supported by fitting the driven tube into the support tube, the driven tube can be loosely inserted into the support tube, and the length between each bearing surface of the bearing tube is increased. to form an annular space between the tip surface of the driven tube and the inner bearing surface of the bearing tube, and extend the tip of the support tube outward from the tip of the driven tube to form this extension. At the same time as protruding into the annular space, a screw is provided on the outer periphery of the extension part, and a locking ring having a rotary operation part on the outer surface in the axial direction and disposed inside the annular space is screwed onto the threaded part. A bicycle hub characterized in that the driven tube, which is loosely inserted into the support tube, is fixed to the support tube.