EP0193286A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Load applying device
Assignee: CatEye Co Ltd
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Filing: 1986-01-30
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Granted: —
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Expires: 2006-01-30
Abstract
Abstract A toad applying device (8) comprises a rotating disc (25) and an electromagnet (27). Since a closed magnetic path is formed by the rotating disc (25) and the electromagnet (27) facing both sides of the rotating disc (25), eddy current is generated efficiently in the rotating disc (25). Since the rotation speed of a load shaft (12) is set to a value higher than a prescribed rotation speed, brake torque applied to the rotating disc (25) by the eddy current generated in the disc functions in a saturated region. Therefore, stable brake torque is applied irrespective of the rotation speed of the load shaft (12).
Inventors
- 👤 Sadaharu Tsuyama
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 18:14
CPC Classifications
H; H02; H02K; H02K49/00; H02K49/02; H02K49/04; H02K49/046; A; A63; A63B; A63B21/00; A63B21/005; A63B21/0051; A63B21/0052; A63B22/00; A63B22/06; A63B22/0605; A63B23/00; A63B23/035; A63B23/04; A63B23/0476; Y; Y10; Y10S; Y10S482/00; Y10S482/90; Y10S482/901; Y10S482/903
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
82 words
A load applying device for applying load to a ' load shaft rotating at a speed higher than a prescribed rotation speed, comprising: a rotating disc coupled to said load shaft so as to be rotated, and an electromagnet disposed in a position where main surfaces of said rotating disc are inserted in said electromagnet but are not in contact therewith, so that magnetic flux traversing the surfaces of said rotating disc is generated to apply brake torque to said rotating disc.
Claim 2
Dependent Claim
82 words
A load applying device for applying load to a ' load shaft rotating at a speed higher than a prescribed rotation speed, comprising: a rotating disc coupled to said load shaft so as to be rotated, and an electromagnet disposed in a position where main surfaces of said rotating disc are inserted in said electromagnet but are not in contact therewith, so that magnetic flux traversing the surfaces of said rotating disc is generated to apply brake torque to said rotating disc.
Claim 3
Dependent Claim
60 words
A load applying device in accordance with claim 1, wherein said electromagnet comprises a core and an exciting coil wound on said core, said core being in the form of the letter C and being disposed in a manner where said main surfaces of said rotating disc are interposed in an opening formed between opposed end surfaces of said core.
Claim 4
Dependent Claim
21 words
A load applying device in accordance with claim 2, wherein a cut core is used as said core of said electromagnet.
Claim 5
Dependent Claim
62 words
A load applying device in accordance with claim 1, wherein said electromagnet comprises: a main body comprising a core and an exciting coil wound on said core and control means for controlling current applied to said exciting coil, whereby quantity of current to be applied to said coil is regulated by said control means to change brake torque applied to said disc.
Claim 6
Dependent Claim
74 words
A load applying device in accordance with claim 4, wherein said control means comprises: torque setting means and calculating means for calculating necessary quantity of current to apply as control torque the torque set by said setting means, said calculation being based on the relation: torque = k 1 + f( I ) where k 1 is a prescribed load value independent of current and f(I) is a load value changing dependent on current.
Claim 7
Dependent Claim
21 words
A load applying device in accordance with claim 1, wherein said rotating disc is provided with fins for radiation of heat.
Claim 8
Dependent Claim
92 words
A load applying device in accordance with claim 1, further comprising: a crankshaft having pedals; and a speed increasing mechanism provided in association with said crankshaft and said load shaft for increasing the rotating speed of said crankshaft to transmit said increased rotating speed to said load shaft, a speed increase ratio at the time of transmission being selected so that the rotation speed of said load shaft may be higher than said prescribed rotation speed with the rotation speed of said crankshaft being in the range of a practically applicable speed.
Claim 9
Dependent Claim
60 words
A load applying device in accordance with claim 7, wherein said electromagnet comprises a core and an exciting coil wound on said core, said core being in the form of the letter C and being provided in a manner where said main surfaces of said rotating disc are interposed in an opening formed between opposed end surfaces of said core.
Claim 10
Dependent Claim
22 words
A load applying device in accordance with claim 8, wherein a cut core is used as the core of said electromagnet. 1
Claim 11
Dependent Claim
27 words
A load applying device in accordance with claim 9, wherein said rotating disc is provided with a weight ring so that said rotating disc rotates with inertia.
Claim 12
Dependent Claim
28 words
A load applying device in accordance with claim 7, wherein said speed increasing mechanism is so structured that increase of speed is made at a plurality of stages.
Claim 13
Dependent Claim
27 words
A load applying device in accordance with claim 11, wherein a motion transmitting mechanism comprising a chain and a gear is adopted in said speed increasing mechanism.
Claim 14
Dependent Claim
28 words
A load applying device in accordance with claim 11, wherein a motion transmitting mechanism comprising a belt and a rotating body is adopted in said speed increasing mechanism.
Claim 15
Dependent Claim
42 words
A load applying device in accordance with claim 11, wherein combination of a motion transmitting mechanism I comprising a chain and a gear and a motion transmitting mechanism comprising a belt and a rotating body is adopted in said speed increasing mechanism.
Claim 16
Dependent Claim
65 words
A load applying device in accordance with claim 7, wherein said electromagnet comprises: a main body comprising a core and an exciting coil wound on said core and control means for controlling current applied to the coil of said main body, whereby quantity of current to be applied to said coil is regulated by said control means to change brake torque applied to said disc.
Claim 17
Dependent Claim
75 words
A load applying device in accordance with claim 15, wherein said control means comprises: torque setting means and calculating means for calculating necessary quantity of current to apply as brake torque the torque set by said setting means, said calculation being based on the relation: torque = k 2 + f ( I ) where k 2 is a prescribed load value independent of current and f(I) is a load value changing dependent on current.
Claim 18
Dependent Claim
21 words
A load applying device in accordance with claim 7, wherein said rotating disc is provided with fins for radiation of heat.
References Cited (Backward Citations)
No citation records indexed.
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