Crank Arm Electronics Packaging

• Main Authors: LONGMAN DAVID JOHN, BASKOVICH TOM PETER
• Format: Patent
• Language: English
• Published: 07.01.2016
• Subjects: ACCESSORIES PECULIAR TO CYCLES AND NOT OTHERWISE PROVIDED FOR,e.g. ARTICLE CARRIERS, CYCLE PROTECTORS; CYCLE SADDLES OR SEATS; CYCLES; LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS; MEASURING; MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER,MECHANICAL EFFICIENCY, OR FLUID PRESSURE; PERFORMING OPERATIONS; PHYSICS; POWERED PROPULSION OF SLEDGES OR; RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; TESTING; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES; TRANSPORTING

A powermeter module (29) for a cycle crank arm includes a single cavity (320), (420) or double sided cavity/cavities (20) extending into the crank arm (12), (312), (412) and arranged to house electronics components (30), (264), 364, (464) (motherboard) and power supply components (54), (254), (354), (364) (powerboard). The powermeter electronics components are electrically connected to strain gauges (28a), (28b) e.g. by hard wires and/or plug and socket arrangement. The powermeter module components are housed in the crank arm and accessible by one or more covers (40), (48), (240), (248), (340), (348), (440), (448) for maintenance access. An associated crank arm (10) has a first cavity disposed towards a crank axis end (12) of the crank arm. A transition zone E of the crank arm material extends from either end of the cavity/cavities to provide a path for normalisation of forces passing to the strain gauge(s).