Bicycle trainer with roller speed sensor

Abstract

A bicycle trainer includes a roller support assembly and a roller positioned about the roller support assembly wherein the roller includes an aperture. A fixing member is disposed in the aperture to secure the roller to the roller support assembly allowing rotation of the roller. An element capable of being sensed disposed in the aperture and a sensor is positioned within the trainer at a stationary location wherein the sensor is configured to sense the element and provide a signal indicative of rotation of the roller.

Claims

1. An apparatus for a bicycle trainer, the apparatus comprising: a magnet; a roller support having spaced-apart bearings; and a roller assembly coupled to the roller support to rotate about a rotation axis, the roller assembly comprising: a flywheel; a roller having an outer cylindrical surface configured to support a tire of a bicycle thereon; and a mounting member that rotates with the roller about the rotation axis, the mounting member having an aperture configured to receive and hold the magnet for rotation with the mounting member and the roller, wherein a top surface of the magnet is flush, substantially flush or lower than the outer cylindrical surface of the roller.

2. The apparatus of claim 1 and further comprising a sensor to sense rotation of the magnet.

3. The apparatus of claim 2 wherein the sensor includes an adhesive to mount the sensor to a support member of the apparatus.

4. The apparatus of claim 1 wherein the roller includes a roller aperture configured to hold the mounting member.

5. The apparatus of claim 1 wherein the roller includes a roller aperture, the aperture of the mounting member being aligned with the roller aperture on an axis orthogonal to the rotation axis.

6. The apparatus of claim 1 wherein the mounting member is a component separate from the flywheel and the roller and is attachable to the roller.

7. A bicycle trainer, comprising: supports; and an apparatus mounted to the supports, the apparatus comprising: a magnet; a roller support assembly having spaced-apart bearings; and a roller assembly coupled to the roller support assembly, the roller assembly comprising: a flywheel; a roller having an outer cylindrical surface configured to engage a tire of a bicycle when the bicycle is mounted to the trainer; and a mounting member being a component that is separate from the flywheel and a portion of the roller having the outer cylindrical surface, the mounting member being attachable to the roller to rotate with the roller about a rotation axis, the mounting member having an aperture configured to receive and hold the magnet for rotation with the mounting member and the roller, a depth of the aperture extending radially relative to the rotation axis.

8. The bicycle trainer of claim 7 and further comprising a sensor to sense rotation of the magnet.

9. The bicycle trainer of claim 8 wherein the sensor is mounted to a support member of the apparatus so as to be proximate the magnet as the magnet rotates about the rotation axis.

10. The bicycle trainer of claim 7 wherein the roller includes a roller aperture configured to hold the mounting member.

11. The bicycle trainer of claim 7 wherein the roller includes a roller aperture, the aperture of the mounting member being aligned with the roller aperture on an axis orthogonal to the rotation axis.

12. The bicycle trainer of claim 7 wherein the magnet is disposed axially between the spaced-apart bearings.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a view of a resistance device for a trainer with some parts shown in section.

(2) FIG. 2 is an elevational view of a support arm and the resistance device

DETAILED DESCRIPTION OF ILLUSTRATIVE EMBODIMENTS

(3) FIG. 1 illustrates an exemplary resistance device 10 for a bicycle trainer (not shown, but an example of which is shown and described in U.S. Pat. No. 6,702,701, which is incorporated by reference in its entirety). Herein the resistance device 10 comprises an impeller unit 10 that includes an impeller 12 disposed within a fluid-filled chamber 14 formed by a bowl 11 and thin plate 13. The impeller 12 is magnetically coupled to a rotating member 16. Although illustrated wherein the resistance device comprises an impeller unit, it should be understood that this is but one embodiment and should not be considered limiting.

(4) Referring to FIGS. 1 and 2, a roller support assembly 19 includes a center shaft 20 fixedly connected at one end to the rotating member 16 and at an opposite end to a flywheel 22 with a nut 24. Bearings 15 mounted to supports 17 (herein also representing the complete trainer) support the shaft 20 and allow rotation thereof. In the embodiment illustrated, the supports 22 are provided on support arm 36; however, this should not be considered limiting.

(5) Roller 18 is fixedly coupled to the roller support assembly 19 using a fixing member 26 that is inserted in an aperture 27 of the roller 18. An exemplary fixing member 26 comprises a set screw that threadably engages a threaded surface that defines the aperture 27 such that an end of the set screw frictionally engages the center shaft 20. A length of the set fixing member 26 is less than a length of the aperture 27 such that when the fixing member engages the roller assembly, an unoccupied portion or void remains in the aperture 27. Although the fixing member 26 as described herein comprises a set screw, other fixing members 26 are also contemplated including, but not limited to keys, pins, bolts or the like.

(6) A magnet 32 is fixed to the roller 18 and a rotation of the roller 18 and shaft 20 is sensed by a sensor 34 that is mounted to a stationary support arm 36 of the trainer 10. FIG. 1 illustrates a particularly convenient location for mounting the magnet 32 to the roller 18, that being the unoccupied portion or space of the aperture 27 remaining after the fixing member 26 fixedly secures the roller 18 to the roller support assembly 19 (e.g. the center shaft 20). In one embodiment, the magnet 32 is sized so as to be flush, substantially flush or lower than an outer surface of the roller 18 so as not to protrude above the outer surface of the roller 18 in a manner that could cause damage or wear on the tire of the bicycle that engages the roller 18.

(7) The magnet 32 can be secured in the aperture 27 using any suitable securing device or method such as but not limited to a friction fit with or without an adhesive. A particularly convenient method securing the magnet 32 within the aperture 27 is through the use of a mounting member 28, as illustrated in FIG. 1. The magnet 32 is positioned within the mounting member 28 and the mounting member 28 is of a size and material of construction to frictionally engage the inner surface of the aperture 27 with the magnet 32 disposed in an aperture (not shown) formed in the mounting member 28. Friction between the mounting member 28 and the aperture 27 may be particularly enhanced when the inner surface of the aperture 27 comprises threads for the set screw 26.

(8) The securing of the magnet 32 in the mounting member 28 and/or mounting of the mounting member 28 in the aperture 27 can further include an adhesive, if desired. However, when an adhesive is not utilized between the mounting member 28 and the aperture 27, the mounting member 28 and the magnet 32 can be more easily removed to provide access to the set screw 26, when needed.

(9) In one embodiment, the mounting member 28 comprises a flexible grommet made of a thermoplastic, an elastomer or combinations thereof that is capable of conforming to and frictionally engaging the surface defining the aperture 27. However, other materials of construction of the mounting member 28 are also contemplated.

(10) As illustrated in FIG. 2, the sensor 34 can be mounted to the support arm 36 using a suitable fastener such as an adhesive. The sensor 34 senses a magnetic field of the passing magnet 32 as the roller 18 rotates. The sensor 34 then provides a signal to a monitoring device (not shown). The sensor 34 can include a reed switch or Hall effect sensing device, but also can take other forms, if desired. The monitoring device receives the signal provided by the sensor 34 to provide information indicative of power, cadence, speed, simulated distance traveled, etc. of the bicycle rider using the trainer.

(11) While a magnet 32 is illustrated and disclosed as the element that is sensed, other sensing elements are also contemplated. Further, while the element being sensed is illustrated as being positioned with the roller 18 and the sensor 34 is illustrated being located in the stationary support arm 36, it is contemplated that the sensor 34 be located in the roller 18 (or some other rotating element of the bicycle trainer 10) and the element capable of being sensed, such as but not limited to the magnet 32, be located in a stationary component of the bicycle trainer 10, such as but not limited to the support arm 36.

(12) When the sensor 32 is positioned within the stationary support arm 36, the signal from the sensor 32 can be transmitted through a hard wired connection or a wireless connection to the monitoring device (not shown). When the sensor 32 is positioned within a rotational element such as the roller 18, the signal from the sensor 32 is typically sent to the monitoring device (not shown) through a wireless connection.

(13) Aspects of the present invention, and in particular, a roller having an aperture for a magnet, and a sensor to sense rotation of the magnet with the roller can be used on other exercise devices having rollers including but not limited to the trainers described and illustrated in US Published Patent Application 2013/0065734, which is hereby incorporated by reference in its entirety.

(14) Although the subject matter has been described in language specific to structural features and/or methodological acts, it is to be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or acts described above as has been determined by the courts. Rather, the specific features and acts described above are disclosed as example forms of implementing the claims.