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US 2025/0085178 A1Published application
Torque sensor, torque detector, and method for manufacturing torque sensor
AssigneeSintokogio, Ltd.
InventorsYoshikane TANAAMI, Miyuki HAYASHI
Life of this patent
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Abstract
A torque detector of a torque sensor has a columnar shape, one end sandwiched between bottom surfaces of a first frame part and a second frame part, the other end sandwiched between bottom surfaces of a first core part and a second core part, and film-shaped strain gauges respectively provided to two side surfaces thereof, the two side surfaces being orthogonal to the bottom surface of the first frame part.
Claims11
A torque sensor comprising:
- a first frame part having a tubular shape;
- a second frame part disposed at a location where a bottom surface of the second frame part faces a bottom surface of the first frame part, the second frame part having a tubular shape concentric to the first frame part;
- a first core part disposed in a hollow space of the first frame part, the first core part having a tubular or columnar shape concentric to the first frame part;
- a second core part disposed at a location which is in a hollow space of the second frame part and where a bottom surface of the second core part faces a bottom surface of the first core part, the second core part having a tubular or columnar shape concentric to the first frame part;
- and
- at least one torque detector having a columnar shape, the at least one torque detector having one end sandwiched between the bottom surfaces of the first frame part and the second frame part, the at least one torque detector having the other end sandwiched between the bottom surfaces of the first core part and the second core part, the at least one torque detector having film-shaped strain gauges respectively provided to two side surfaces of the at least one torque detector, the two side surfaces being orthogonal to the bottom surface of the first frame part.
3 more elements
A torque detector for use in a torque sensor that includes:
- a first frame part having a tubular shape;
- a second frame part disposed at a location where a bottom surface of the second frame part faces a bottom surface of the first frame part, the second frame part having a tubular shape concentric to the first frame part;
- a first core part disposed in a hollow space of the first frame part, the first core part having a tubular or columnar shape concentric to the first frame part;
- and a second core part disposed at a location which is in a hollow space of the second frame part and where a bottom surface of the second core part faces a bottom surface of the first core part, the second core part having a tubular or columnar shape concentric to the first frame part,
- the torque detector having a columnar shape, the torque detector comprising:
- one end sandwiched between the bottom surfaces of the first frame part and the second frame part;
- the other end sandwiched between the bottom surfaces of the first core part and the second core part;
- and
- film-shaped strain gauges respectively provided to two side surfaces of the torque detector, the two side surfaces being orthogonal to the bottom surface of the first frame part.
6 more elements
A method for manufacturing a torque sensor that includes:
- a first frame part having a tubular shape;
- a second frame part disposed at a location where a bottom surface of the second frame part faces a bottom surface of the first frame part, the second frame part having a tubular shape concentric to the first frame part;
- a first core part disposed in a hollow space of the first frame part, the first core part having a tubular or columnar shape concentric to the first frame part;
- a second core part disposed at a location which is in a hollow space of the second frame part and where a bottom surface of the second core part faces a bottom surface of the first core part, the second core part having a tubular or columnar shape concentric to the first frame part;
- and a torque detector, the method comprising:
- a first step of forming a film-shaped strain gauge on a side surface of the torque detector formed in a columnar shape;
- a second step of causing one end of the torque detector to be sandwiched between the bottom surfaces of the first frame part and the second frame part and causing the other end of the torque detector to be sandwiched between the bottom surfaces of the first core part and the second core part;
- and
- a third step of fastening the first frame part and the second frame part to each other and fastening the first core part and the second core part to each other,
- the side surface of the torque detector on which side surface the film-shaped strain gauge is formed in the first step being the side surface which is made orthogonal to the bottom surfaces of the first frame part and the second frame part in the second step.
7 more elements
Dependencies are inferred from the claim text.