Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
  • B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
  • B62J6/00—Arrangement of optical signalling or lighting devices on cycles; Mounting or supporting thereof; Circuits therefor
  • B62J6/06—Arrangement of lighting dynamos or drives therefor

Definitions

• This invention relates to a dynamo for mounting on a bicycle, a moped or the like, consisting of a circu- 5 lar stator part with coils which is secured to the hub axle, and a rotor part with magnets which extends around the stator and is secured to the wheel.
• Hitherto known dynamos of this kind are designed for 10 building into a specially constructed hub, which also means that the dynamo has to be mounted with spokes adapted for the purpose, because on the side where the rotor part of the dynamo is placed, these have to be fastened to a spoke ring secured to the exterior 15 of the rotor. Moreover, since the dynamo is built in ⁇ to a hub with a built-in brake, a brake arm has to be mounted on the stator. This hub dynamo is thus inten ⁇ ded for use only in specially constructed wheels and, moreover, is expensive and difficult to produce. Fur- 20 ther to this, the dynamo is troublesome to repair, the reason being that it cannot be taken apart with ⁇ out the risk of damage to the dynamo's electrical components.
• the object of the invention is to overcome the disad ⁇ vantages of the known hub dynamos while retaining their existing practical advantages, and this is ach ⁇ ieved when the stator coil is secured to a plate hav- ing a hole for the axle and which can lie up against •• j 30 the outside of the hub cone.
• This makes it possible to construct a hub dynamo which can be mounted on ex ⁇ isting wheels, in that the stator part is placed out ⁇ side the existing hub cone on the rear wheel hub op ⁇ posite the chain, and is locked firmly to the hub by
• a dynamo can be placed in an existing wheel, which involves great advantages for the user, who hereafter needs only to invest in the dynamo.
• the dynamo After having been mounted, the dynamo has the advantageous characteristics of a hub dynamo, such as reliability, good efficiency and security against re ⁇ moval.
• the dy ⁇ namo can be mounted on a rear hub with brake, in that the plate replaces the brake arm.
• the pivotable driving stud can be used as a coupling as well as a spring pin in the event of a blockage of the rotor.
• fig. 1 shows a side view of the dynamo mounted on a rear wheel
• fig. 2 shows a part-section of the dynamo seen in the direction II-I in fig. 1.
• the drawing shows a preferred embodiment of the dy ⁇ namo secured to and built into a rear hub.
• the hub itself is a normal hub (see fig. 2) which can have a built-in brake and possibly gears.
• the dynamo sits on the left side of the hub opposite the sprockets
• the hub is rotatably mounted on an axle 1, and in fig. 2 can be seen the left cone 7 with the longitud- inal recess 4 for the brake arm.
• the dynamo itself consists of a stator part and a .rotor part.
• the stator part is secured to a plate 8 which has a hole for the axle 1 and also recesses for the cone 7, so that the plate engages with the brake arm recess 4 as seen in the sectional drawing fig. 2.
• a ring is formed for the plate 8 which extends in over the hub.
• the plate is provided with a brake arm (not shown) which, by means of generally known locking means 27, see fig. 1, can be fastened to a part of the frame, in the example shown to the fork part 26.
• stator coil 14 On the ring is the actual stator coil 14, which ' is . surrounded by the stator irons 15 and inserted rest- ing against an end stop formed by the plate 8.
• the coil housing can be placed in the stator plate core 15 in a commonly known manner.
• cover- plate 9 On the outside of the plate 8 is fastened a cover- plate 9 which, as can be seen in the drawing, has its edge bent in over the coil, thus closing the dynamo off towards the outer side.
• This plate 8 with cover 9 is fastened firmly to the hub by means of the existing hook nuts 3, and secured to the fork 11 by means of the wheel nut 6 with wash ⁇ er 5. Moreover, as mentioned earlier, it"is fastened to the fork leg 26.
• a disc 16 Over the hub 2 is also placed a disc 16 having a cir ⁇ cular opening at its centre which is slightly larger than the hub. At the inner edge there is mounted a seating ring 13 which is flexible and ensures a tight seating against the hub.
• intermediate rings (not shown) with sliding seals can be inserted in the recess instead of the shown sealing ring 12.
• the outer part of the disc 16 is bent over, and in the ring thus formed there is mounted a magnet ring 18 which, extends the whole way around.
• a magnet ring 18 which, extends the whole way around.
• To the inside surface of this ring there are mounted or moulded-in magnets 17 of the desired number and size as well as power.
• the outer side of the ring 16 and the inner side of the cover 9 together with ribs displaced from each other, form a labyrinth seal, so that protection is provided against the ingress of dust and water into the dynamo.
• stator and rotor ensures that these are precisely centred and that the desired efficiency is thus achieved.
• the rotor disc 16 can be secured to the spokes with the help of retaining means such as fasteners or the like (not shown) , so that the rotor always follows the wheel's rotation under all circumstances.
• the rotor disc 16 is provided with releasable driving means. These comprise a bracket 19, the outer part of which forms a bearing pin 20 carrying a stud.21 which can be swung in between the spokes 22 of the wheel. In the position shown, the rotor turns with the wheel, and in the event of a blockage in _the .dynamo, the stud 21 will break off and protect the cyclist against injury and the dynamo against damage.
• the stud 21 can be swung away from engagement with the spokes into the position shown in the drawing by the stippled 'line, whereby the wheel can turn freely without driving the rotor around with it. In this way the efficiency of the bicycle is considerably in ⁇ creased when there is no need to produce current.
• cover ⁇ plate 9 can be provided with reflecting coatings or ' means (not shown) .
• the shape of the dynamo can, within the scope of the invention, be adapted to suit requirements. It can thus be made "dish-shaped” , in that the coverplate 9 can extend essentially parallel with the spokes 22.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
• Permanent Magnet Type Synchronous Machine (AREA)
• Automatic Cycles, And Cycles In General (AREA)
• Braking Arrangements (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=8107589

Family Applications (1)

Country Status (5)

Families Citing this family (4)

Family Cites Families (7)

• 1982
  • 1982-04-19 DK DK172982A patent/DK147555C/da not_active IP Right Cessation
• 1983
  • 1983-04-18 EP EP83901372A patent/EP0106871A1/en not_active Withdrawn
  • 1983-04-18 WO PCT/DK1983/000045 patent/WO1983003584A1/en not_active Ceased
  • 1983-04-18 DE DE19833340228 patent/DE3340228T1/de not_active Withdrawn
  • 1983-12-19 NO NO834678A patent/NO834678L/no unknown

Non-Patent Citations (1)

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