JPS5973302A - Coaster hub for bicycle - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention includes a coaster hub for a bicycle, and more particularly, includes at least one sprocket. The present invention relates to a coaster hub that includes a driving body and a hub sleeve that is connected to the hub sleeve such that it can be taken out depending on the operation.

Federal Republic of Germany Patent No. 1155655 +1=lI
In the bicycle coaster heel disclosed in lt., the hub sleeve is releasably connected to a drive body holding a plurality of sprockets via a ratchet type freewheel. , the drive body is rotatably supported on a first shaft part, by means of which it can itself be fixed as a unit to the frame of the bicycle. The hub sleeve is rotatably but not axially displaceably mounted on the second shaft part via two ball bearings in the area of its spoke flanges. The second shaft portion is
The first
It can be connected to the shaft part of. The freewheel is supported by a drive member so as to be pivotable about a radial axis;
The pawl has pawl engaging teeth that engage under the application of a spring force. 1 depending on the space required for the claw inside the drive body
Special multiple sprockets with stepped inner diameters are required.

With known coaster hubs, the hub sleeve can be removed from the drive without having to change the chain adjustment ((
However, it is difficult to remove the rear wheel from the bicycle frame. This is because the shaft portion on which the hub IJ-p is supported is not pluggable. The bearing cone of the double bearing, which supports the hub sleeve, is fixed to this shaft part.

In the bicycle drive hub known from GB 29398, the drive body carrying the sprocket is rotatably mounted on a first shaft part and as a unit via a coaxial part. It can be fixed to the bicycle frame. The drive shaft is supported by two ball bearings on a second shaft part, which can be inserted from the side opposite the drive body and screwed into the first shaft part. This known drive hub does not have a freewheel.

In the coaster hub known from French Patent No. 997,757, the hub sleeve and the drive body with the sprocket are rotatably mounted on a common hub axle. As a result, the hub sleeve cannot be removed for operation if the drive body is integrated into the bicycle frame. A ratchet type freewheel has a pawl that is rotatably supported in the radial direction on the driving body.
The sleeve has pawl engaging teeth.

SUMMARY OF THE INVENTION The object of the invention is to provide a coaster hub for a bicycle, which has a hub sleeve that can be removed from a drive fixed to the bicycle without any problems and can be reinstalled.

The coaster hub of the present invention that solves this problem has a hub shaft that can be divided in the axial direction according to the operation, and the first shaft part of the two shaft parts of the hub shaft itself is fixed to the backbone. a drive body with a sprocket is rotatably mounted on the first shaft portion, and a hub sleeve with a spoke seven flange is rotatably mounted on the second shaft portion; 1. without the need to remove the drive body from the backbone. The hub sleeve can be separated from the drive body, and the non-rotatable connection between the drive body and the hub sleeve is provided by a ratcheting freewheel, the pawls of which are radially pivotably supported on the bush sleeve. The pawl engaging tooth formed by the axial groove of the drive body is elastically engaged with the spring, and the radial stopper provided on the hub sleeve restricts the rotational movement of the pawl. - is adapted to maintain the pawl in substantially the position it occupies when engaged with the pawl engaging teeth when the hub sleeve is removed. This configuration makes it possible to insert the hub sleeve axially into the drive body and to connect it with the same 91A mr body. Advantageously, the stop is adapted to hold the pawl in a position that is pivoted somewhat further radially inwards than the position corresponding to the engagement position, so that the pawl on the pawl engagement tooth Accurate engagement is guaranteed. In this case, the radially outer edge of the drive member on the claw side or the tip of the claw on the drive member side is provided with an entry slope.

As the ball bearing supporting the hub sleeve on the second shaft portion, a deep groove ball bearing is used, in which the inner I/- and the outer I/- are firmly connected to each other in the axial direction via balls. It is advantageous to have one. Such ball bearings, manufactured as a complete unit, have a relatively low play, so that the bearing cones provided for adjusting the axial bearing play in universal bicycle hubs can be dispensed with. . Since there is no need to fasten the race to the second shaft part, the coaxial part can be inserted axially into the hub sleeve, which simplifies the assembly of the hub sleeve and the drive body. If the outer ring protrudes into the pivot path of the pawl and at the same time forms the stop described above, it is no longer necessary to provide a special stop for the freewheel pawl, which is integrally molded on the bus sleeve. In order to fix the hub sleeve in the axial direction, a spacer sleeve may be provided between the inner races of both positive bearings. and on the other side the first shaft portion contacts the inner race.

In order to simplify the structure of the drive body, an axial groove is provided on the outer circumferential surface of the drive body extending over its entire length, and the groove forms a pawl-engaging tooth and provides a driving force for the sprocket. It is designed to create an immovable body connection.

The invention will now be described in detail with reference to the drawings.

The coaster hub has a hub axle designated as a whole by reference numeral 1, and a haptic IJ-b3 and a drive body 5 are rotatably supported on the hub axle 1 adjacent to the hub sleeve 3 in the axial direction. ing. The hub sleeve 3 has two spoke flanges 7.9 spaced apart from each other in the axial direction. A plurality of sprockets 11, shown simply in broken lines, are rigidly arranged on the drive body 5. In one direction of rotation, the drive body 5 has a ratchet type freewheel 13.
... is connected to the hub sleeve 3 in a relatively unrotatable manner, whereas in the other direction of rotation, the hub sleeve 3
It can be rotated freely against the The hub axle 1 is fixed to the backbone 15 of the bicycle.

The shaft 1 is configured to be axially slim and separable, and has a first shaft portion 17, which has a threaded hole in the axial direction at one end. has 19,
A threaded extension 21 of the second shaft portion 23 passing through the hub sleeve 3 is screwed into this threaded hole 19 .

Separation of the first shaft portion 17 from the no-p sleeve 3 -C
An external thread 25 is provided at the end of the
It is tightly screwed onto the backbone 15 by two nuts 27 and 29. The driving body 5 has two ball bearings 31.
It is supported on the shaft part 17 via 33. Ball bearing 31
．． The outer 1 north of 33 is integrally molded with the sleeve-shaped drive body 5. The inner race of the ball bearing 31 is molded integrally with the shaft portion 17, whereas the inner race of the ball bearing 33 is an adjustment screw threaded onto the outer thread 25 and abutting against the nut 27. It is formed by a cone 35.

The shaft part 23 can be inserted axially into the hub sleeve 3 from the outside of the backbone 15 and has an eccentric shaft 39 rotatably mounted on the shaft part 23 at the end opposite the shaft part 17 . It has a tightening device 37. The axis of rotation of the eccentric shaft 390 extends eccentrically with respect to the cylindrical clamping flange 41 which is rotatably mounted on the clamping cap 43 . The eccentric shaft 39 and the clamping flange 41 are integrally connected with a clamping l/bar 45 extending at right angles to the eccentric shaft 39. When the clamping bar 45 is pivoted, the clamping cap 43 is moved axially relative to the shaft part 23.

The hub sleeve 3 has a cylindrical recess 4 which is open axially outward in the area of the spoke flange 7.9.
7.49 each have one ball bearing 51.53 designed as a deep groove ball bearing. Ball bearings 51 and 53 are 1 each
It has two external I/-s 55,5γ and an external I/-s 5
．． 5° 57 each axially and radially fix one inner ring 63,65 via a ball 59,61. ...The notches 4T and 49 of the Busleep 3 are provided with shoulder portions facing oppositely to each other in the axial direction,
These shoulders define the axial spacing of the outer teeth 55, 57.

The axial spacing of the inner races 63, 65 is defined by a spacer tube 67, which itself is attached to the reduced diameter section 69 of the push sleeve 3:1. -1.・It is guided in the radial direction. The inner race 65 on the side opposite to the spacer tube 6γ when viewed in the axial direction is in contact with the end face of the inner race 65 of the 1h11 portion 17. A spacer link 71 is inserted into the force λ axis part 23 between the part of the eccentric tightening device 3γ and the inner race 63 of the moonsuk 15.
Therefore, tighten the spacer ring 71, inner race 63. It is tightened via the spacer tube 67 and the inner spacer 65 towards the shaft part 17 which is fixed to the other part of the hawk 15. □ The freewheel 13 has a claw 73 (・This claw 7
3 is the radially outer side σ)
The drive body 5 is supported in a bearing ring 75 concentrically surrounding the drive body 5 so as to be pivotable about a pivot axis I parallel to the drive body 5 . The bearing ring 75 is held firmly in the notch 77 of the bushing sleeve 3, which follows the axially extending ball 4III and the bearing 53.

At its radially inner end, the pawl 73 engages in an axial groove 79 distributed on the outer circumference of the drive body 5 .

In this case, these grooves 79 form the pawl-engaging teeth of the freewheel 13. As shown in the figure, the pawl 73 is pre-loaded in the radially inner direction 6 and the groove 79 by the spring. The outer I/-south 57 of the ball holder 53, which extends over the length and at the same time serves to fix the sprocket 110 against rotation, is axially adjacent to the drive body 5. It protrudes from the notch 49 and enters the notch 77.The outside 11 of the outside The radially inner ends of the pawls 73 are not in contact with the outer race 57 in the illustrated assembled state of the coaster hub. 1-'c is the outer periphery of the outer 1/-s 5γ that protrudes into the orbit of the pawl 73, forming a stopper 81, and this stopper 81 prevents the pawl 73 from entering the groove 79 when assembling the coaster hub. The 1/C pawl γ3 is firmly held at a position approximately corresponding to the position occupied by the engagement of the pawl 73. As a result, the hub sleeve 3 is inserted into the drive body 5.

To remove hub sleeve 3, tighten collar 45.
is pivoted from the position shown, thereby relaxing the hub axle 1. The shaft portion 23 is screwed out from the shaft 81S portion 17 and taken out in the axial direction. spacer ring 71
After removing the hub sleeve 3, the hub sleeve 3 is pulled out from the drive body 5 in the axial direction and removed from the backbalk 15. In this case, there is no need for the fixation of the driver 5 to be released.

Assembly of the coaster hub is performed in reverse order. Depending on the IC, a radially inner corner of the pawl 73 facing the driver 5 and/or a radial edge of the driver 5 facing the pawl 73 is provided with a An introduction slope may be provided to facilitate insertion of the claw 73.

[Brief explanation of drawings]

The drawing is a plan view showing an embodiment of the coaster hub according to the present invention, with the upper half sectioned away. 1...Hub axle, 3...Hub sleeve, 5...Driving body, 7.9...Shawk 7' run, 11...Sprocket), 13...Freewheel, 15...Back balk , 17.23...Shaft part, 19...Screw thread A"
Hole, 21... Threaded additional part, 25 - External thread, 2
7゜29...Nut, 31.33...Ball bearing, 35
- Adjustment cone, 37... Eccentric tightening device, 39 - Eccentric shaft, 41゜... Tightening flange, 43... Tightening cap, 45... Tightening lever, 47, 49.77... Notch, 51. 53...Ball bearing, 55.57...Outer race,
59.61... Ball, 63.65 ・Inner North, 67.
・Space pipe, 69 ・Reduced diameter part, 71 ・Spacer ring, 73 ・Claw, 75 ・Support ring, 79 ・Groove, 81 ・Stopper

Claims (1)

[Scope of Claims] 1. A coaster hub for a bicycle, comprising: (a) two shaft parts (1) that are releasably connected to each other in the axial direction;
7, 23), one of the two axle parts (17) is itself fixed to the bicycle; (b) it has at least one sprocket (11) and a first A drive body (5) rotatably supported on the shaft portion (17) is provided, and (c) has two spoke flanges (7, 9) arranged at an axial distance from each other. and the second of said both shaft portions.
A hub sleeve (3) is provided rotatably mounted on the second shaft part (23), and each spoke has seven lanterns (2) for bearing the hub sleeve (3) on the second shaft part (23). 7, 9) 1 each in the range
(e) A freewheel (13) is disposed in the torque transmission path between the drive body (5) and the hub sleeve (3), and In the type in which the wheel has pawl-engaging teeth and at least one pawl (73) that engages with the pawl-engaging teeth under a spring force, the freewheel (13) winter melon (
73)...In the bush sleeve (3), the hub axle (1)
the drive body (5) is pivotably supported about a rotation axis parallel to the drive body (5), and pawl engagement teeth are provided on the drive body (5);
At least one stopper (8) on the knob sleeve (3)
1) is provided, said stop limiting the pivoting movement of the pawl (73) towards the driver (5) in a position approximately corresponding to the locking position of the pawl (73). A coaster for bicycles. 2. Both positive bearings (51, 53) are respectively held by the hub sleeve (3) and are connected to the outer race (55, 57) through the outer race (55, 57) and the outer race (55, 57) via the balls (59, 61). The second shaft portion (23) is held in the ball bearing from the side opposite to the driver (5) when viewed in the axial direction. The coaster hub according to claim 1, which can be inserted into (51, 53). ro, a stopper (81) that limits the rotational movement of the claw (73).
) is the ball bearing (5) which is axially adjacent to the drive body (5).
3) A coaster hub according to claim 2, wherein the coaster hub is formed by an outer I/-s (57) of 3). 4. A separate spacer tube (67) between the inner races (63, 65) of both positive bearings (51, 53) when viewed in the @ direction.
is arranged, and the spacer tube is connected to the hub sleeve (3).
Claim 2 fixed radially at
Coaster hub as described in section. 5. The drive body (5) of the hub sleeve (3) when viewed in the axial direction.
) on the side opposite to the separate spacer ring (71
) is inserted into the second shaft portion (23), and the inner race (6) of the ball bearing (51) provided on the same side as the shaft portion
3) The coaster hub according to claim 2, which is in contact with. 6. The drive body (15) has a groove (79) extending axially over its entire length, which groove forms a pawl-engaging tooth and prevents rotation of the sprocket (11) relative to the drive body (5). A coaster hub according to claim 1, which produces an immovable connection.