GB2136065A - Gear-change device for a multi- ratio cycle hub - Google Patents
Gear-change device for a multi- ratio cycle hub Download PDFInfo
- Publication number
- GB2136065A GB2136065A GB08402789A GB8402789A GB2136065A GB 2136065 A GB2136065 A GB 2136065A GB 08402789 A GB08402789 A GB 08402789A GB 8402789 A GB8402789 A GB 8402789A GB 2136065 A GB2136065 A GB 2136065A
- Authority
- GB
- United Kingdom
- Prior art keywords
- gear
- change
- distance
- hub
- actuating cable
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
- B62M25/00—Actuators for gearing speed-change mechanisms specially adapted for cycles
- B62M25/02—Actuators for gearing speed-change mechanisms specially adapted for cycles with mechanical transmitting systems, e.g. cables, levers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
- B62M11/00—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels
- B62M11/04—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels of changeable ratio
- B62M11/14—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels of changeable ratio with planetary gears
- B62M11/16—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels of changeable ratio with planetary gears built in, or adjacent to, the ground-wheel hub
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Gear-Shifting Mechanisms (AREA)
- Control Of Transmission Device (AREA)
Abstract
The gear-change device (1) comprises a securing part (5) screwed on to the threaded end of a hub spindle (3) of the multi-ratio hub (1) and a distance-compensating part (17) guided displaceably in relation to the securing part, which part (17) is arranged in a gear-change force path of the multi- ratio hub (1), leading from a manually actuatable actuating cable by way of a deflection element (27) to a gear- change element (13), in such manner that it can allow delay between movement of the actuating cable and movement of the gear-change element (13). The distance-compensating part (17) is supported on a spring (57) acting against the distance-compensating movement, the force of which spring is greater than an oppositely directed force exerted on the gear-change element (13). A detent device (47, 53) defines the positions of the actuating cable in relation to the distance- compensating part (17). The distance- compensating part (17) and spring (57) allow pre-selection of gears when the gear elements are locked by drive torque. <IMAGE>
Description
SPECIFICATION
Gear-change device for a multi-ratio cycle hub
The invention relates to a gear-change device
for a multi-ratio cycle hub in the hub spindle of
which, provided at the end with an external
threading, a gear-change element is axially movably guided.
Such a gear-change device is known from Fed.
German Pub. Sp. 27 23 869. It comprises a holder
secured on the threaded end of the hub spindle
and an actuating device actuatable manually by
means of a gear-change lever or the like, which is
coupled with the gear-change element of the
multi-ratio hub through an actuating cable which
can be subjected to either tension or compression
stress and is guided movably approximately
radially of the hub spindle in the region of the
holder. On the holder there is movably guided a
deflector element in the form of a double-armed
bell-crank lever or a draw chain which connects the actuating cable, movable radially in the region
of the holder, with the axially movable gear
change element. A detent device held on the
holder and acting on the deflector element
positions the actuating cable in the positions
corresponding to the gear-change positions of the
gear-change element.Since the actuating cable is
detained in the region of the multi-ratio hub, the
gear-change positions of the gear-change element
can be indexed irrespective of stretches and the
like of the actuating cable occurring in operation.
In the known gear-change device the holder is
clamped by means of a screw to the threaded end
of the hub spindle. For this purpose either the hub
spindle must be provided with additional detent
and clamping faces, or the danger exists that the
threading may be damaged in the fitting of the
holder. In addition to the holder a separate collar
nut is necessary for fastening the multi-ratio hub to the cycle frame.
It is the problem of the invention to improve the
above-explained gear-change device so that it can
be fitted more easily to the hub spindle of the
multi-ratio cycle hub and so that furthermore it
comprises a shift distance reservoir permitting
manual movement of the actuating device even if the multi-ratio hub is subject to drive loading and thus for the moment cannot follow the shift
movement.
According to the invention on a securing part of the holder which can be secured on the hub spindle there is movably guided a distance
compensating part which is arranged in the gearchange force path leading from the actuating cable by way of the deflector element to the gearchange element, in such manner that it can
compensate the shift distance of the actuating
cable in relation to the gear-change element at
least for one gear. In this way the actuating cable
can be displaced manually even if the gear-change element cannot carry out any gear-change movement
by reason of the drive loading of the multi-ratio
hub.The distance-compensating part is supported
on a spring acting against the distance
compensation movement, the spring force of
which spring is greater than an oppositely directed force exerted by the gear-change element upon
the distance-compensating part in the shift
movement of the gear-change element. The spring
serves as storage spring which is stressed by
manual displacement of the actuating cable. It is
stronger than the gear-change spring provided in
the multi-ratio hub. When the locking of the gear
change element is eliminated the spring presses
the distance-compensating part into its normal position, the gear-change element being moved against the force of the gear-change spring of the gear hub into its gear-change position corresponding to the pre-setting of the actuating cable.The detent device here defines the positions ofthe actuating cable in relation to the distance-compensating part so that the pre-setting of the actuating cable is maintained until the locking of the gear-change element is eliminated and the storage spring of the distance-compensating part can move the gear-change element.
The force transmission path from the actuating cable to the gear-change element preferably stresses the storage spring only in the direction opposite to the direction of the force of the gearchange spring. Inthe opposite direction of the force-transmission path an idle motion device ensures that the position of the actuating cable can be shifted without stressing the gear-change spring even if the gear-change element is locked.
For this direction of actuation the gear-change spring takes over the storage function. The storage spring provided for the first-mentioned direction of actuation can be provided between the distancecompensating part and the holder or directly in the force-transmission path.
It should be pointed out that by the feature of the actuating cable there is to be understood any substantially elongated force-transmission connection, including for example rod linkages and the like. The deflector elements, according to the design of the multi-ratio hub, can convert a pulling movement of the actuating cable into a pulling movement of the gear-change element or a pulling movement of the actuating cable into a thrust movement of the gear-change element. For this purpose connecting chains or single- or doublearmed levers articulated to the holder are suitable.
In a preferred form of embodiment the securing part is formed as a threaded sleeve which can be screwed on to the threaded end of the hub spindle, on which sleeve the distancecompensating part is guided both axially displaceably and coaxially rotatably. The threaded sleeve is used at the same time as spindlesecuring nut for the multi-ratio hub and the distance-compensating part at the same time compensates for different spindle lengths. The distance-compensating part expediently engages in the threaded sleeve, namely so that it strikes upon the end face of the hub spindle. The end face of the hub spindle in this manner forms a reference face in relation to which the detent device, acting between the actuating part and the distance-compensating part, can be adjusted.The spring used as storage spring here acts between the threaded sleeve and the distancecompensating part and initially stresses the distance-compensating part against the end face of the hub spindle.
An example of embodiment of the invention is to be explained in greater detail hereinafter by
reference to drawings, wherein:- FIGURE 1 shows a diagrammatic sectional view of a gear-change device for securing on the hub spindle of a multi-ratio cycle hub, seen along a line I-I in Figure 2, and
FIGURE 2 shows a plan view of the gear
change device seen in the axial direction from the
multi-ratio hub.
The Figures show a multi-ratio cycle hub 1,
indicated in dot-and-dash lines, the hub spindle 3
of which is provided with an external threading at the end and is screwed by means of a threaded
sleeve 5 of a gear-change device 7, explained in
greater detail hereinafter, with interposition of a
washer 9 to a rear fork of the cycle, indicated at
11, without additional collar nut or the like. The
hub spindle 3 of the multi-ratio hub 1 is of hollow formation and axially displaceably guides a gearchange rod 13 by the axial displacement of which the gear position of the multi-ratio hub 1 is determined. A gear-change spring (not illustrated further) of the multi-ratio hub 1 initially stresses the gear-change rod 13 axially in the direction towards the gear-change device 7.The gearchange device 7 deflects the gear-change
movement of a Bowden cable 15, which can be subjected to either tension or compression stress and extends in the region of the gear-change device 7 transversely of the axial direction of the hub spindle 3, into the axial movement of the gear-change rod 13. The Bowden cable 15 can be actuated manually by means of a hand lever (not illustrated further) and controls the gear-change position of the multi-ratio hub 1.
A deflection housing 1 7 is guided rotatably coaxially with the hub spindle 3 on the threaded sleeve 5. The deflection housing 17 with a substantially cylindrical housing part 1 9 axially displaceably encloses the cylindrical part remote from the hub of the threaded sleeve 5 which
moreover is provided with spanner faces 21. On the side of the cylindrical housing part axially remote from the spanner faces 21 and the multiratio hub 1 a housing socket 23 of the deflection.
housing 17 adjoins in axial extension of the threaded sleeve 5, into which socket an arm 25 of a two-armed bell-crank lever 27 engages. The bell-crank lever 27 is mounted pivotably on the deflection housing 17 by means of a spindle 29 extending transversely of the hub spindle 3, and has a nose 31 extending in front of the front of the free end of the gear-change rod 13 extending into the housing socket 23. A second arm of the bellcrank lever 27, which protrudes at an angle to the arm 25 from the spindle 29 towards the multiratio hub 1 is firmly connected with the hub end of an actuating cable 37 guided displaceably in a sheath 35 of the Bowden cable 15.The cable jacket or sheath 35 of the Bowden cable 15 is supported on a housing extension piece 39 which extends transversely of the cylindrical housing part 19 and guides the Bowden cable 15 transversely of the hub spindle towards the arm 33 of the bellcrank lever 27. The sheath 35 of the Bowden cable 1 5 is fixed, as may best be seen from Figure 2, in a recess 41. The free end of the actuating cable 37 is held in a screw clamp 43 fitted on the free end of the arm 33. From the screw clamp 43 a guide plate 45 extends towards the sheath 35 and guides the part of the actuating cable 37 extending unguided between the sheath end and the screw clamp 43.
The edge of the arm 25 facing the housing part 39 has substantially the form of an arc of a circle into which detent recesses 47 for each of the gear positions of the multi-ratio hub 1 are formed radially of the axis 29 from the edge. A detent ball 51 is seated radially displaceably in an opening 49, extending radially of the axis 29, of the
housing extension piece 39 and is pressed by a leaf spring 53 into the detent openings 47. The
leaf spring 53 is held at the end in a recess 55 of the housing extension piece 39.
Between the inner surface of the cylindrical housing part 1 9 and the outer surface of the cylindrical part of the threaded sleeve 5 an annular gap is provided in which a helical compression spring 57 is seated which coaxially encloses the threaded sleeve 5. The helical compression spring
57 bears on a radially inwardly protruding collar
59 at the hub end of the cylindrical housing part
19 on the one hand and on a circlip 61 inserted at the end of the threaded sleeve 13 remote from the
hub on the other hand. The helical compression
spring 57 thus initially stresses the deflection
housing 17, guided rotatably and axially
displaceably on the threaded sleeve 5, resiliently
towards the multi-ratio hub 1. In the housing socket 23 there is further secured an insert 63
which can at the same time form a part of the wall
of the housing socket 23.The insert 63 carries a
tubular extension 65 engaging coaxially in the
threaded sleeve 5. The tubular extension 65 with
its end 67 facing the multi-ratio hub 1 forms a stop
which abuts, when the hub is fitted, on the end
face of the hub spindle 3 remote from the hub and
holds the deflection housing 17, irrespective of the
actual position of the threaded sleeve 5, in a
reference position in relation to the hub spindle 3
and thus in relation to the gear-change elements
of the multi-ratio hub 1. The deflection housing 17
in combination with the helical compression
spring 57 thus forms a distance-compensating
part which orients the detent positions, defined by
the detent ball 51 and the detent recesses 47, in
relation to the multi-ratio hub 1, irrespective of the
position which the threaded sleeve 5 assumes in
relation to the multi-ratio hub 1.
The force of the helical compression spring 57
is dimensioned so that it cannot overcome the
force of the detent device, that is when the gear
change rod 13 is locked it cannot rotate the arm
25 against the detent force of the spring 53. On
the other hand the force of the helical
compression spring 57 is greater than the force of
the gear-change spring arranged in the multi-ratio
hub 1 and pushing out the gear-change rod 13.
The helical compression spring 57 thus acts as
storage spring which, when the gear-change rod
13 is locked, is stressed by way of the deflection
housing 1 7 acting as distance-compensating
element, by actuation of the actuating cable 37,
and after elimination of the locking of the gear
change rod 13 shifts the latter. Such a device
permits the pre-selection of the gears even when
the gear elements are locked by the drive torque.
By means of the hand lever the detent position of the bell-crank lever 27 is modified. Since the arm
25 rests on the gear-change rod 13 which is
locked during the drive phase, the deflection
housing 1 7 is moved axially away from the multi
ratio hub 1, the stop force 67 lifting away from the
end face of the hub spindle 3. The axial
displacement distance of the deflection housing 1 7 is dimensioned so that it can compensate the
axial gear-change movement over all gears.
The helical compression spring 57 is stressed
by displacement of the deflection housing 1 7 in only one of the two directions of actuation of the actuating cable 37. In the opposite direction of actuation the nose 31 of the arm 25, abutting freely on the end face of the gear-change rod 13,
can lift away from the gear-change rod 13 in the direction of an idle motion device, if the change function should be locked by reason of the drive loading of the gearing.
Claims (9)
1. Gear-change device for a multi-ratio cycle
hub (1) in the hub spindle (3) of which, provided at
the end with an external threading, a gear-change
element (13) is guided axially movably, comprising: a) a holder (5, 17) securable on the threaded end of the hub spindle (3),
b) a manually actuatable actuating device (15)
having an actuating cable (37) or the like
subjectable to either tension or compression stress and guided movably approximately radially of the hub spindle (3) in the region of the holder (5,17),
c) a deflection element (27) guided movably on the holder (5, 1 7), which couples the radially
movable actuating cable (37) with the axially
movable gear-change element (13),
d) a detent device (47, 51) acting upon the deflection element (27) and held on the holder (5,
1 7), for the positioning of the actuating cable (37) in the position corresponding to the gear-change positions of the gear-change element (13), 'characterised in that on a securing part (5) of the holder securable on the hub spindle there is movably guided a distance-compensating part (17) which is arranged in the gear-change force
path leading from the actuating cable (37) by way
of the deflection element (27) to the gear-change
element (13r, in such manner that it can
compensate the gear-change path of the actuating
cable (37) in relation to the gear-change element
(13) at least for one gear, in that the distancecompensating part (17) is supported on a spring (57) acting against the distance-compensating movement, the force of which spring is greater than an oppositely directed force exerted by the gear-change element (13) in its gear-change
movement upon the distance-compensating part, and in that the detent device (47, 51) defines the positions of the actuating cable (37) in relation to the distance-compensating part (1 7).
2. Gear-change device according to Claim 1, characterised in that the actuating part is formed as a threaded sleeve (5) which can be screwed on to the threaded end of the hub spindle (3), on which sleeve the distance-compensating part (17) is guided both axially displaceably and coaxially rotatably.
3. Gear-change device according to Claim 2, characterised in that the spring (57) acts in the axial direction of the threaded sleeve (5) and is stressed in between the threaded sleeve (5) and the distance-compensating part (17).
4. Gear-change device according to Claim 3, characterised in that the distance-compensating part (1 7) comprises a stop part (65) engaging in the threaded sleeve (5), which part, initially stressed by the spring (57), rests resiliently on the end face of the hub spindle (3).
5. Gear-change device according to one of
Claims 2 to 4, characterised in that the deflection element is formed as a two-armed bell-crank lever (27) articulated to the distance-compensating part (17), which lever rests with its first arm (25) on a gear-change rod (13) issuing from the end of the threaded sleeve (5) remote from the hub, and the second arm (33) of which lever is connected with the actuating cable (37).
6. Gear-change device according to Claim 5, characterised in that the first arm (25) comprises open detent recesses (47) facing radially away from the pivot axis (29) and arranged in an arc of a circle about the pivot axis of the bell-crank lever (27), and in that a detent ball (51) co-operating with the detent recesses (47) is guided under resilient initial stress radially of the pivot axis (29) in a recess (49) of the distance-compensating part (17).
7. Gear-change device according to Claim 5 or 6, characterised in that the first arm (25) and the second arm (33) of the bell-crank lever (27) are offset in relation to one another in the direction of the pivot axis (29).
8. Gear-change device according to one of the preceding Claims, characterised in that an idle motion device is arranged in the forcetransmission path between the actuating cable (37) and the gear-change element (13) and transmits an actuating force only in the direction of actuation of the actuating cable stressing the spring, but not in the opposite direction of actuation.
9. A gear-change device substantially as described herein and with reference to the accompanying drawings.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19838302727 DE8302727U1 (en) | 1983-02-02 | 1983-02-02 | SWITCHING DEVICE FOR HUBS OF BICYCLES OR THE LIKE. |
Publications (3)
Publication Number | Publication Date |
---|---|
GB8402789D0 GB8402789D0 (en) | 1984-03-07 |
GB2136065A true GB2136065A (en) | 1984-09-12 |
GB2136065B GB2136065B (en) | 1986-01-08 |
Family
ID=6749540
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB08402789A Expired GB2136065B (en) | 1983-02-02 | 1984-02-02 | Gear-change device for a multi-ratio cycle hub |
Country Status (3)
Country | Link |
---|---|
JP (1) | JPS59143789A (en) |
DE (1) | DE8302727U1 (en) |
GB (1) | GB2136065B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5182962A (en) * | 1990-10-06 | 1993-02-02 | Fichtel & Sachs Ag | Actuating force transmission unit for a gear change mechanism of a bicycle |
EP0531608A2 (en) * | 1991-09-09 | 1993-03-17 | Shimano Inc. | Self-contained change speed apparatus for a bicycle |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1580405A (en) * | 1976-04-21 | 1980-12-03 | Shimano Industrial Co | Control device for a multi speed hub |
GB1582796A (en) * | 1976-05-26 | 1981-01-14 | Shimano Industrial Co | Multi-speed hub for a bicycle |
-
1983
- 1983-02-02 DE DE19838302727 patent/DE8302727U1/en not_active Expired
-
1984
- 1984-02-02 JP JP1620484A patent/JPS59143789A/en active Pending
- 1984-02-02 GB GB08402789A patent/GB2136065B/en not_active Expired
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1580405A (en) * | 1976-04-21 | 1980-12-03 | Shimano Industrial Co | Control device for a multi speed hub |
GB1582796A (en) * | 1976-05-26 | 1981-01-14 | Shimano Industrial Co | Multi-speed hub for a bicycle |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5182962A (en) * | 1990-10-06 | 1993-02-02 | Fichtel & Sachs Ag | Actuating force transmission unit for a gear change mechanism of a bicycle |
EP0531608A2 (en) * | 1991-09-09 | 1993-03-17 | Shimano Inc. | Self-contained change speed apparatus for a bicycle |
EP0531608A3 (en) * | 1991-09-09 | 1993-04-28 | Shimano Inc. | Self-contained change speed apparatus for a bicycle |
US5322487A (en) * | 1991-09-09 | 1994-06-21 | Shimano, Inc. | Self-contained change speed apparatus with shaped pawls to equalize a shifting spring force for a bicycle |
Also Published As
Publication number | Publication date |
---|---|
GB8402789D0 (en) | 1984-03-07 |
DE8302727U1 (en) | 1983-05-11 |
JPS59143789A (en) | 1984-08-17 |
GB2136065B (en) | 1986-01-08 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |