Yamaha Marine Kabushiki Kaisha

Yamaha Hatsudoki Kabushiki Kaisha

Yamaha Motor Company Ltd

National Institute of Advanced Industrial Science and Technology

Yoshinori Harada

Yutaka Mizuno

Tomoyoshi Koyanagi

Yoshiyuki Kaneko

Satomi Ishikawa

Wataru Ishii

Akihiko Murai

Akira Satoh

Natsuki Miyata

Noriko Shii

Mitsunori Tada

A magnetostrictive load sensor includes an upper casing, a lower casing, a coil, and a bobbin. The upper casing having an approximate bell shape has an upper end that is provided with an opening and a lower end that is provided with a notch. The lower casing includes a disk-shaped member and a bar-shaped member that are integral with each other. The coil is formed by winding a conducting wire around the bobbin. A predetermined position of the bobbin is provided with a lead wire outlet for taking out the conducting wire of the coil. A method of manufacturing the magnetostrictive load sensor includes inserting the bar-shaped member into the axial center of the bobbin, and covering the lower casing with the upper casing. In this way, the notch of the upper casing and the lead wire outlet of the bobbin are fitted with each other. An upper end of the bar-shaped member projects through the opening of the upper casing.

Magnetostrictive load sensor

A watercraft has steering force detection sections. Each steering force detection section includes a pressure receiving section. The pressure receiving sections are spaced from each other and are in the vicinity of a steering shaft. A pressing member is coupled to the steering shaft. The pressing member can press on at least one of the pressure receiving sections when the steering handlebars are rotated to a maximum steering angle. A received pressure detection section detects the pressure applied to the pressure receiving section. The pressure receiving section and the received pressure detection section are coaxially mounted in a pressure receiving section casing and a detection section casing. A guide tube can engage the pressure receiving section and the received pressure detection section. The guide tube is formed with ribs and grooves. The pressure receiving section has a pressure receiving member, a bolt, a plain washer, and a spring member.

Steering force detection device for steering handle of vehicle

Steering-force detection sections, including a pressure-receiving section and a received-pressure detection section, are spaced from one another in the vicinity of a steering shaft. The steering shaft can include a pressing member for applying pressure to the pressure-receiving section when steering handlebars are rotated in either direction to the maximum steering angle. The pressure-receiving section and the received-pressure detection section are coaxially mounted in a pressure-receiving section casing and a detection section casing, respectively, through a guide tube, so that the pressure-receiving directions of both the pressure-receiving sections are parallel to one another and perpendicular to the direction in which the steering-force detection sections are spaced. The detection section casing includes mounting openings for mounting the received-pressure detecting sections and an electric circuit board, which is integrally connected to the received-pressure detecting sections. The mounting openings are formed in the same direction as each other and perpendicularly to the pressure-receiving direction of the pressure-receiving section.

Steering-force detection device for steering handle of vehicle

A load detector is constructed so as to stabilize an output voltage responding to an input load. The load detector includes a magnetostrictive sensor which includes a hollow case, a coil housed in the case, and a rod-like magnetic member located at an axial center of the coil, magnetized by an electric current flowing through the coil and receiving a load at an end thereof. The load detector further includes a pin which has a contact surface for applying the load onto the end of the magnetic member and is disposed axially inline with the magnetic member, and a bearing collar for reducing displacement of the pin with respect to the magnetic member. The magnetostrictive sensor and the pin are fitted, facing each other, into the bearing collar. The load detector is utilized suitably for transport equipment such as a water vehicle or electric bicycle.

Load detector and transport equipment including the same

Growing community of inventors

Shizuoka, Japan

Yoshinori Harada