JPS59143789A - Changeover device for multistage speed change hub of 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 is a switching device for a multi-speed hub of a bicycle, and the multi-speed shift knob has a gear switching mechanism in a shaft having an external thread on the terminal end side. It relates to a type in which the shaft is movably guided in the axial direction.

A switching device of this type is known from German Patent Application No. 27 23 869. This known type of switching device has a holder fixed to the threaded end of the hub axle and a switching lever or similar manually operable actuating device. This actuating device is connected to the gear change mechanism of the multi-stage switching hub via an actuating rope that is movable approximately radially relative to the hub axle in the area of the holding body and is subject to tension and pressure loads. ing. A two-armed bell crank or block chain-shaped direction changing mechanism is movably guided in the holding body.

This deflection mechanism connects a radially movable operating rope in the region of the holding body to an axially movable gear change mechanism.

A locking device held in the holder and acting on the deflection mechanism positions the operating rope in a position in which the gear changeover position of the gear changeover mechanism is reached. Since the control rope is locked in the range of the multi-speed knob, the gear change position of the gear change mechanism is determined independently of the extension of the control rope formed depending on the operation or the like. .

In the known switching device, the holder is fastened to the threaded end of the hub axle by means of a screw.

For this purpose, it is necessary to provide additional locking and clamping surfaces on the knob shaft. Otherwise, there is a risk that the thread on the knob shaft will be damaged when the holder is installed. In addition to the holder, a separate flanged nut is required to secure the multi-speed transmission to the bicycle frame.

It is an object of the present invention to improve the switching device of the type mentioned at the beginning so that it can be easily attached to the multi-speed transmission hub of a bicycle, and furthermore, the multi-speed change hub is exposed to the driving load. It is an object of the present invention to provide a switching stroke storage device which allows manual adjustment of the operating device even when the switching movement is not carried out.

It mainly consists of a fixed part fixed to the rope shaft and a travel compensation part movably guided by this fixed part, and this travel compensation part leads from the operating rope to the gear switching mechanism via the deflection mechanism. It is arranged in the shifting force transmission path and is configured to compensate the shifting stroke of the operating rope for at least one gear associated with the gear shifting mechanism. With this configuration, the operating rope can be manually adjusted even when the multi-speed transmission hub is under a heavy driving load and the gear switching mechanism cannot perform a switching movement. Furthermore, according to a feature of the invention, the stroke compensation part is supported by a spring acting against the stroke compensation movement, the spring force of this spring causing the gear change in a direction opposite to the direction of action of the spring force. The force is larger than the force acting on the stroke compensating part during the switching movement of the mechanism. The spring according to the invention is used as a storage spring (storing spring force) which is tensioned by manually adjusting the operating rope. The spring force of this storage spring is greater than the bias force of the switching spring provided in the multi-speed shift knob. When the locking force of the gear change mechanism is released, the storage spring forces the travel compensator into its normal position. In this case, the gear switching mechanism is moved to the gear switching position corresponding to the pre-adjustment position of the operating rope against the spring force of the switching spring of the multi-speed hub. Furthermore, according to a feature of the invention, a locking device force 1 is provided for locking the position of the operating rope relative to the stroke compensation part.
In the pre-adjustment position Q of the operating rope, the gear change mechanism is unlocked and the storage spring of the travel compensation part is secured until the gear change mechanism is moved.

The force transmission path from the operating rope to the gear change mechanism advantageously only tensions the storage spring in the direction opposite to the direction of action of the spring force of the gear change spring. In the direction of action of the spring force of the gear changeover spring, a play device is arranged, which allows the position of the operating rope to be adjusted without increasing the tension load on the changeover spring even when the gear change mechanism is locked. It is now possible to do so. Due to the direction of operation opposite to the direction of action of the spring force of this gear changeover spring, the gear changeover spring exerts a spring force storage action. The storage spring provided for the operation in the direction opposite to the direction of action of the spring force of the gear changeover spring is provided between the travel compensating part and the holding body or directly in the force transmission path. It is provided.

The operating rope according to the present invention is mainly a long elongated traction force transmission connection member, such as a rod or similar structure. Depending on the situation, it is possible to convert the pulling movement of the operating rope into a pulling movement of the gear-changing mechanism, or to transfer the pulling movement of the operating rope into a suppressing movement of the gear-changing mechanism. A single-armed or two-armed lever or a connecting chain are suitable.

According to another advantageous embodiment of the invention, the fixed part of the holding body, which is fixed to the hub axle, is designed as a threaded sleeve that is screwed into the threaded end of the hub axle, the threaded sleeve The travel compensating portion is axially movable and coaxially rotatable with the threaded sleeve. The threaded sleeve at the same time serves as a shaft fixing nut for the multi-speed hub, and the travel compensating section simultaneously compensates for different axial lengths. The stroke compensation part advantageously extends into the threaded IJ-spring and abuts against the end face of the hub axle.

In this manner, the end face of the hub axle is adjusted in conjunction with a locking device that acts between the actuating lobe 0 and the travel compensation part. In this case, the spring used as a storage spring acts between the threaded sleeve and the travel compensation part and loads the travel compensation part towards the end face of the hub axle.

Next, the configuration of the present invention will be specifically explained with reference to the embodiments shown in the drawings.

In the drawing, the bicycle multi-speed transmission frame 1 is indicated by a chain line. The hub axle 3 of the multi-speed hub 1 of this bicycle has a male thread at its terminal end, and a switching device 7 which will be described in detail later.
The threaded sleeve 5 is screwed into the rear fork 11 of the bicycle with the aid of a washer 9 and without any additional nuts or the like. The 7'i shaft 3 of the multi-speed shift knob 1 is hollow and guides a gear switching mechanism constructed as a gear switching rod 13 so as to be movable in the axial direction. By moving this gear switching rod 13 in the axial direction, the gear stage of the multi-stage transmission hub 1 is defined. A switching spring (not shown) of the multi-speed gearbox 1 is a gear switching rod 13.
is applied axially towards the switching device 7. The switching device 7 converts the switching movement of the Bowden wire 15, which is subjected to tension and pressure loads, into an axial movement of the gear switching rod 13. Bowden wire 15 extends in the area of switching device 7 in a direction perpendicular to the axial direction of hub axle 3 . The Bowden wire 15 is manually operated by a manual transmission (not shown) to control the gear position of the multi-speed transmission hub 1.

In the threaded sleeve 5, a stroke compensation part, which is configured as a deflection housing 17, is rotatably guided coaxially with respect to the knob shaft 3. The substantially cylindrical casing portion 19 of the deflection casing 17 allows the cylindrical portion of the threaded sleeve 5 provided with the spanner surface 21 on the side opposite to the multi-speed transmission no. 1 to be pivotable in the axial direction. surrounded.

A casing pocket 23 of the deflection casing 11 is connected to the axially opposite side of this cylindrical part 19 from the spanner face 21 and the multi-speed knob 1 by an axial extension of the threaded sleeve 5. There is.

One arm 25 of a two-armed bell crank 27 is engaged in the casing pocket 23 . bell crank 2
7 is rotatably supported on the deflection casing 17 by a shaft 29 extending perpendicularly in the axial direction to the hub shaft 3, and the cam protrusion 31 of the bell crank 27 projects into the casing pocket 23 for gear switching. It engages with the free end of the rod 13 at the front end thereof. bell crank 27
The other arm 33 projects from the shaft 29 toward the multi-speed gear 1 at an angle with respect to the one arm 25 and has an operating port guided slidably within the jacket 35 of the Bowden wire 15. - is immovably coupled to the hub-side end of the hub 37. The cover or jacket 35 of the Bowden wire 15 is supported in a housing extension 39 which extends in a direction perpendicular to the cylindrical housing part 19 and which extends the Bowden wire 15 relative to the hub axle 3. and is guided to the other arm 33 of the bell crank 27 in a direction orthogonal to the other arm 33 of the bell crank 27. As can be clearly seen in Figure 2, jacket 3 of Bowden wire 15
5 is fixed within the notch 41 of the casing attachment part 39. The free end of the operating rope 37 is held by a screw tightening member 43 attached to the free end of the other arm 33. A side member 45 protrudes toward the jacket 35 from the screw tightening member 43 . This guide member 45 is connected to the casing attachment portion 39 of one arm 25 that guides the portion of the operating rope 370 that extends unguided between the jacket end and the screw tightening member 43.
The side edges have a substantially arcuate shape. This arcuate edge has a locking notch 47 extending in the radial direction with respect to the shaft 29 for defining the gear stage of the multi-speed gearbox 1.
is formed. In an opening 49 of the casing attachment part 39 extending radially with respect to the shaft 29, a locking means 51, which is pushed into the locking notch 47 by a leaf spring 53, is positioned so as to be slidable in the radial direction. are doing. The locking notch 47 and the locking method 51 constitute a locking device.

The terminal end of the leaf spring 53 is connected to a notch 55 in the casing portion 39.
held within.

An annular gap is formed between the inner circumference of the cylindrical casing part 19 and the outer circumference of the cylindrical part of the threaded sleeve 50. A coil spring 57, which coaxially surrounds the threaded sleeve 5, is fitted into this annular gap.

This helical spring 57 is supported on the one hand by a radially inwardly projecting collar 59 provided at the hub end of the cylindrical casing part 19 and on the other hand opposite the hub of the threaded sleeve 13. Stopper 6 provided at the side end
1 is supported. In this way, the coil spring 57
spring-elastically presses the deflection casing 1γ, which is rotatably and axially movably guided by the threaded sleeve 5, towards the multi-speed hub 1. An insert member 63 is further fixed within the casing pocket 23.

This insert 63 also forms a wall part of the housing pocket 23. Insert member 63 has a tube extension 65 that engages coaxially within threaded sleeve 5 .

This pipe extension 65 forms a stop with its end face 67 facing towards the multi-speed hub 1 . This stopper abuts the end face of the hub axle 3 opposite to the hub in the mounted state of the hub and moves the deflection casing 17 relative to the hub axle 3 independently of the actual position of the threaded sleeve 5. position, and thus the relative position of the multi-speed hub 1 to the switching mechanism. The deflection casing 17 thus communicates with the coil spring 57 and forms a stroke compensation part. This stroke compensation part adjusts the locking position defined by the locking method 51 and the locking notch 47 in relation to the multi-speed gear 1, that is, in relation to the threaded sleeve 5 in relation to the multi-speed hub 1. Align regardless of the position they occupy.

The spring force of the coil spring 57 is configured so as not to exceed the locking force of the locking device. In other words, gear switching
One arm 2 of the bell crank 27 in the locked state of 13
5 is configured to such an extent that it does not rotate against the locking force of the leaf spring 53. On the other hand, the spring force of the coil spring 57 is stronger than the spring force of the switching spring arranged in the multi-speed hub 1 for moving the gear switching rod 13. In this way, the coil spring 57 is connected to the gear switching rod 13.
When the gear changeover rod 13 is unlocked, it is pulled through the deflection casing 17 which acts as a travel compensator by operating the operating rope 3γ, and acts as a storage spring to move the gear changeover rod 13 when the gear changeover rod 13 is unlocked. act. A device of this type prepares a gear change even if the gear changeover member is locked by the drive torque. The locking position of the bell crank 27 can be changed by a manual switching device. One arm 2
5 is supported by a locked gear changeover rod 13 during operation, so that the deflection casing 17 is moved axially with respect to the multi-speed gear 1, in this case the tube extension 65 acting as a stop surface. The end surface 67 is separated from the end surface of the hub axle 3. The axial displacement movement of the deflection housing 17 is designed to such an extent that the axial shifting movement can be compensated for over all gears.

By displacing the deflection housing 1γ, the coil spring 57 is tensioned only in one of the two operating directions of the operating rope 3γ. In the other operating direction of the operating rope 37, one arm 2 freely abuts against the end face side of the gear switching rod 13.
The cam projection 31 of 5 forms an idle movement away from the gear changeover rod 13 when a drive load is applied to the gear changeover device and the changeover movement is to be locked.

[Brief explanation of drawings]

FIG. 1 shows an embodiment of the switching device according to the present invention, which is fixed to the knob shaft of a multi-speed knob of a bicycle.
2 is a schematic cross-sectional view taken along line 1. FIG. 2 is a view of the switching device according to FIG. 1, viewed from the multi-speed hub side. 1... Multi-speed shift knob, 3... Push shaft, 5...
Threaded sleeve, 7 - switching device, 9... washer, 11... rear wheel fork, 13 ear switching rod,
15... Bowden wire, 17 - Direction changing casing,
19. Casing part, 21. Spanner surface, 23. Casing pocket, 25. Arm, 27. Bell crank, 29. Shaft, 31. Cam protrusion, 33.
... Arm, 35 ... Jacket, 37 ... Operation rope, 39 ... Casing attachment part, 41 ... Notch, 43 ... Screw tightening member, 45 ... Guide member, 4
7 - Locking notch, 49... Opening, 51... Locking ball, 53... Leaf spring, 55... Notch, 57: Coil spring, 59... Brim, 61... Retaining ring, 63...
Insertion part removed, 65...tube addition part, 67...end face (other 1
name) FIG, 1. 15

Claims (1)

[Claims] 1. A switching device for a multi-speed shift knob of a bicycle, which has a gear in a knob shaft (3) having a male thread on the terminal end side of the multi-speed shift knob. The switching mechanism (13) is movably guided in the axial direction, (a) a holder is provided that is fixed to the threaded end of the knob shaft (3), and (b) the range of the holder is a manually operated operating device comprising an operating rope (37) or the like which is guided movably in a substantially radial direction relative to the knob shaft (3) and is subject to tension and pressure loads; (c) a deflection mechanism movably guided by the holding body, the deflection mechanism converting the radially movable operating rope (37) into an axially movable gear changer; Mechanism (13
), and connects the operating rope (37) to the gear switching mechanism (
13), wherein a locking device is provided that is held by the holding body and acts on the direction change mechanism for positioning it at a position corresponding to the gear change position of 13), wherein the holding body is Hub axle (3)
and a travel compensating part (11) movably guided by this fixed part, the travel compensating part (17) being able to move from the operating rope (37) to the deflecting rope (37). a shifting stroke of the operating rope (37) for at least one gear associated with the gear shifting mechanism (13), which is arranged in a shifting force transmission path leading to the gear shifting mechanism (13) via a mechanism; Further, the stroke compensation portion (17) is supported by a spring ('57) that acts against the stroke compensation movement, and the spring force of the spring (57) is adapted to compensate for this stroke compensation movement. The force is configured to be larger than the force acting on the stroke compensating portion during the switching movement of the gear switching mechanism (13) in a direction opposite to the acting direction of the spring force, and the position of the operating loaf 0 (37) is adjusted to the stroke compensating portion. (17) A switching device for a multi-speed hub of a bicycle, characterized in that it is provided with a locking device (47, 51) for locking relative to the hub of the holding body. The fixed part fixed to the axle (3) is configured as a threaded sleeve (5) screwed into the threaded end of the hub axle (3);
2. The switching device according to claim 1, wherein the travel compensating part (17) is axially movable and rotatably guided coaxially with the threaded sleeve (5). 6. A spring (57) is provided which acts in the axial direction of the threaded sleeve (5) and is tensioned between this threaded sleeve (5) and the travel compensation part (11). A switching device according to scope 2. 4. the stroke compensation part (17) has a stopper part (65) that engages the threaded sleeve (5);
3. The switching device according to claim 1, wherein the stopper part (65) is preloaded by the spring (57) K and spring-elastically abuts against the end face of the hub axle (3). 5. 2 in which the direction changing mechanism is connected to the stroke compensation portion (17);
It is configured as an arm-shaped bell crank (27), the first arm (25) of which is connected to the end of the threaded sleeve (5) opposite the image door. The second arm (33) of the bell crank (27) is connected to the operating port, - (3γ), abutting a gear switching mechanism configured as a projecting gear switching rod. The switching device according to any one of items 2 to 4. 6 First arm (25) of the bell crank (27)
The bell crank (27) has a locking notch (47) that is arranged in an arc shape around the pivot shaft (29) and opens in the radial direction from the pivot shaft (29). A locking ball (51) cooperating with a locking notch (47) is located in the opening (49) of the travel compensating part (17) in the pivot axis (29).
6. The switching device according to claim 5, wherein the switching device is guided in a radial direction by an elastic pre-roll 1'. 7 First arm (25) of the bell crank (27)
and the second arm (33) are arranged offset from each other in the direction of the pivot axis (29).
The switching device according to paragraph 6 or paragraph 6. 8. The operating rope (δ7) and gear switching mechanism (13)
of the operating rope (37) in the force transmission path between the
Any one of claims 1 to 7, wherein a play device is disposed that transmits the operating force only in the operating direction in which the spring is loaded, and does not transmit the operating force in the opposite operating direction.
Switching device as described in section.