RELATIVE ANGLE SENSING DEVICE AND ELECTRIC POWER STEERING APPARATUS

• US 20130134966A1
• Filed: 06/04/2012
• Published: 05/30/2013
• Est. Priority Date: 11/30/2011
• Status: Active Grant

• Current Assignee: Showa Corporation (Hitachi, Ltd.)
• Original Assignee: Showa Corporation (Hitachi, Ltd.)
• Inventors: Hamaguchi, Yusuke, Hama, Yohei
• Granted Patent: US 8,896,296 B2
• Time in Patent Office: Days
• US Class Current: 324/207.25
• CPC Class Codes: G01D 11/245 Housings for sensors
• CPC Class Codes: G01D 5/145 influenced by the relative movement between the Hall device and magnetic fields see G01R33/06

Abstract

A relative angle sensing device is provided with: a sensor that is contained in a housing in which a communication hole communicating inside and outside is formed, and outputs an electric signal according to relative rotation angle between two rotary shafts coaxially arranged; an electric cable that transmits the electric signal outputted from the sensor to an apparatus arranged at outside of the housing; an electric cable holding member that is fitted with the communication hole of the housing and holds the electric cable; and an outer component that is arranged at a position outside the electric cable holding member in the communication hole of the housing, and that has, at inside thereof, a penetration hole through which the electric cable passes. The outer component has a pair of opening and closing components that is joined by a hinge and opens and closes the penetration hole by relative rotation.

Claims

1. A relative angle sensing device comprising:

a sensor that is contained in a housing in which a communication hole communicating inside and outside is formed, and outputs an electric signal according to a relative rotation angle between two rotary shafts coaxially arranged;

an electric cable that transmits the electric signal outputted from the sensor to an apparatus arranged at outside of the housing;

an electric cable holding member that is fitted with the communication hole of the housing and holds the electric cable; and

an outer component that is arranged at a position outside the electric cable holding member in the communication hole of the housing, and that has, at inside thereof, a penetration hole through which the electric cable passes, wherein

the outer component has a pair of opening and closing components that is joined by a hinge and opens and closes the penetration hole by relative rotation.

2. The relative angle sensing device according to claim 1, wherein the penetration hole of the outer component is formed so that a hole direction of one end as an end on an electric cable holding member side and a hole direction of the other end as an end on a side opposite to the electric cable holding member side intersect with each other.

3. The relative angle sensing device according to claim 2, wherein the outer component bends the electric cable passing through the penetration hole at a sharp angle between the one end of the penetration hole and the other end thereof.

4. The relative angle sensing device according to claim 1, wherein

the outer component has a joining part that is joined by the hinge and projects from an outer peripheral surface to outside, and

the housing has a concave part into which the joining part of the outer component is inserted, at a periphery of the communication hole.

5. The relative angle sensing device according to claim 2, wherein

the outer component has a joining part that is joined by the hinge and projects from an outer peripheral surface to outside, and

the housing has a concave part into which the joining part of the outer component is inserted, at a periphery of the communication hole.

6. The relative angle sensing device according to claim 3, wherein

the outer component has a joining part that is joined by the hinge and projects from an outer peripheral surface to outside, and

the housing has a concave part into which the joining part of the outer component is inserted, at a periphery of the communication hole.

7. The relative angle sensing device according to claim 1, wherein

the opening and closing components of the outer component have a pair of connecting components joined by a hinge, respectively, each of bodies of the opening and closing components and corresponding one of the connecting components are joined by a hinge, and the pair of the connecting components are contained in an area inside the outer peripheral surface of the outer component when the penetration hole is closed by the pair of the opening and closing components.

8. The relative angle sensing device according to claim 2, wherein

the opening and closing components of the outer component have a pair of connecting components joined by a hinge, respectively, each of bodies of the opening and closing components and corresponding one of the connecting components are joined by a hinge, and the pair of the connecting components are contained in an area inside the outer peripheral surface of the outer component when the penetration hole is closed by the pair of the opening and closing components.

9. The relative angle sensing device according to claim 3, wherein

the opening and closing components of the outer component have a pair of connecting components joined by a hinge, respectively, each of bodies of the opening and closing components and corresponding one of the connecting components are joined by a hinge, and the pair of the connecting components are contained in an area inside the outer peripheral surface of the outer component when the penetration hole is closed by the pair of the opening and closing components.

10. An electric power steering apparatus comprising:

a sensor that outputs an electric signal according to a relative rotation angle between two rotary shafts coaxially arranged;

a housing in which the sensor is contained and a communication hole communicating inside and outside is formed;

an electric cable that transmits the electric signal outputted from the sensor to an apparatus arranged at outside of the housing;

an electric cable holding member that is fitted with the communication hole of the housing and holds the electric cable; and

an outer component that is arranged at a position outside the electric cable holding member in the communication hole of the housing, and that has, at inside thereof, a penetration hole through which the electric cable passes, wherein

the outer component has a pair of opening and closing components that is joined by a hinge and opens and closes the penetration hole by relative rotation.

11. A relative angle sensing device comprising:

a sensor that is contained in a housing in which a communication hole communicating inside and outside is formed, and outputs an electric signal according to a relative rotation angle between two rotary shafts coaxially arranged;

an electric cable that transmits the electric signal outputted from the sensor to an apparatus arranged at outside of the housing;

an electric cable holding member that is fitted with the communication hole of the housing and holds the electric cable; and

an outer component that is partially inserted into a position outside the electric cable holding member in the communication hole of the housing, and that has, at inside thereof, a penetration hole through which the electric cable passes, wherein

the outer component has a pair of joining components that is joined to form the penetration hole and the pair of the joining components has a pressing part that presses the electric cable at outside of the communication hole of the housing.

12. The relative angle sensing device according to claim 11, wherein

the pressing part of the outer component is configured by making the size of the penetration hole partially decreased.

13. The relative angle sensing device according to claim 11, wherein

any one of the joining components of the outer component has a protruding part that protrudes from a wall surface forming the penetration hole to a center of the penetration hole.

14. The relative angle sensing device according to claim 12, wherein

any one of the joining components of the outer component has a protruding part that protrudes from a wall surface forming the penetration hole to a center of the penetration hole.

15. The relative angle sensing device according to claim 13, wherein

a plurality of the electric cables are provided, and

a tip end of the protruding part provided to one component out of the pair of the joining components of the outer component is formed into a circular arc, the wall surface forming the penetration hole in the other component out of the pair of the joining components is formed into a circular arc, and the pressing part presses the plurality of electric cables so that the plurality of electric cables are aligned in a circumferential direction by the protruding part of the one component and the wall surface of the other component.

16. The relative angle sensing device according to claim 14, wherein

a plurality of the electric cables are provided, and

a tip end of the protruding part provided to one component out of the pair of the joining components of the outer component is formed into a circular arc, the wall surface forming the penetration hole in the other component out of the pair of the joining components is formed into a circular arc, and the pressing part presses the plurality of electric cables so that the plurality of electric cables are aligned in a circumferential direction by the protruding part of the one component and the wall surface of the other component.

17. The relative angle sensing device according to claim 11, wherein

a plurality of the electric cables are provided, and

a size of the penetration hole is larger than a total size of the plurality of electric cables at an area between an end of the penetration hole of the outer component on an electric cable holding member side and the pressing part.

18. The relative angle sensing device according to claim 17, wherein

a bundling component that bundles the plurality of electric cables is provided, and

the size of the penetration hole is larger than an outer shape of the bundling component bundling the plurality of electric cables at the area between the end of the penetration hole of the outer component on the electric cable holding member side and the pressing part.

19. An electric power steering apparatus comprising:

a sensor that outputs an electric signal according to a relative rotation angle between two rotary shafts coaxially arranged;

a housing in which the sensor is contained and a communication hole communicating inside and outside is formed;

an electric cable that transmits the electric signal outputted from the sensor to an apparatus arranged at outside of the housing;

an electric cable holding member that is fitted with the communication hole of the housing and holds the electric cable; and

an outer component that is partially inserted into a position outside the electric cable holding member in the communication hole of the housing, and that has, at inside thereof, a penetration hole through which the electric cable passes, wherein

the outer component has a pair of joining components that is joined to form the penetration hole and the pair of the joining components has a pressing part that presses the electric cable at outside of the communication hole of the housing.