In-wheel motor-driven device

Abstract

An object of the present invention is to reduce an axial dimension of an in-wheel motor driving device in which a motor section A and a wheel hub bearing section C are connected coaxially in series via a speed reducer section B, thereby providing a large inside space of a vehicle as well as increasing freedom of routing a power supply wires. A terminal box for the power supply wires which supply power to the motor section A is disposed on the outer circumferential side surface of the housing which holds the motor section A. The power supply wires are routed out of the terminal box to an inboard side and are anchored by a power supply wire holder which extends perpendicularly to an axial centerline of the housing.

1 . An in-wheel motor driving device comprising: a motor section which rotates a motor-side rotation member; a speed reducer section which reduces and transmits rotation of the motor-side rotation member to a wheel-side rotation member; and a wheel hub connected and fixed to the wheel-side rotation member; the above three elements being disposed in series from an inboard side to an outboard side of a vehicle; wherein a terminal box for power supply wires which supply power to the motor section is disposed on an outer circumferential side surface of a housing which supports the motor section. 
     
     
         2 . The in-wheel motor driving device according to  claim 1 , further comprising a power supply wire holder for anchoring the power supply wire routed out of the terminal box, the power supply wire holder extending perpendicularly to an axial centerline of the housing of the motor section. 
     
     
         3 . The in-wheel motor driving device according to  claim 2 , wherein the power supply wire holder has a holder which is shaped to hold an elastic member of the power supply wire in a swaging manner. 
     
     
         4 . The in-wheel motor driving device according to  claim 1 , wherein the power supply wire from a stator of the motor section is routed perpendicularly to an axial centerline of the housing which holds the motor section. 
     
     
         5 . The in-wheel motor driving device according to  claim 1 , wherein a cable outlet for a rotation angle sensor is provided on the outer circumferential side surface of the housing of the motor section A, at a position about 180 degrees away around the rotation axis of the motor section from the terminal box which is disposed on the outer circumferential side surface of the housing of the motor section. 
     
     
         6 . The in-wheel motor driving device according to  claim 1 ,  wherein a cable outlet for a rotation angle sensor is provided on an inboard-side end surface of the housing of the motor section A, at a position about 180 degrees away around the rotation axis of the motor section from the terminal box which is disposed on the outer circumferential side surface of the housing of the motor section. 
     
     
         7 . The in-wheel motor driving device according to  claim 1 , wherein the holder for anchoring the power supply wire is formed integrally with an inboard side of the outer circumference of the housing which supports the motor section. 
     
     
         8 . An in-wheel motor driving device comprising: a motor section which rotates a motor-side rotation member; a speed reducer section which reduces and transmits rotation of the motor-side rotation member to a wheel-side rotation member; and a wheel hub connected and fixed to the wheel-side rotation member; the above three elements being disposed in series from an inboard side to an outboard side of a vehicle; wherein a terminal box for a power supply wire which supplies power to the motor section is disposed on an outboard-side end surface of a housing which supports the motor section, with a holder for anchoring the power supply wire routed out of the terminal box to an inboard side being provided on a housing which supports the motor section. 
     
     
         9 . The in-wheel motor driving device according to  claim 8 , wherein a wire from a stator of the motor section is routed in an outboard direction of the housing which supports the motor section. 
     
     
         10 . An in-wheel motor driving device comprising: a motor section which rotates a motor-side rotation member; a speed reducer section which reduces and transmits rotation of the motor-side rotation member to a wheel-side rotation member; and a wheel hub connected and fixed to the wheel-side rotation member; the above three elements being disposed in series from an inboard side to an outboard side of a vehicle; wherein a terminal box for a power supply wire which supplies power to the motor section is disposed on an outboard-side outer circumferential surface of a housing which supports the motor section, with a holder for anchoring the power supply wire routed out of the terminal box to an inboard side being provided on a housing which supports the motor section. 
     
     
         11 . The in-wheel motor driving device according to  claim 10 , wherein a wire from a stator of the motor section is routed in a radial direction of the housing which supports the motor section. 
     
     
         12 . The in-wheel motor driving device according to  claim 1 , wherein the terminal box includes a box main body formed integrally with the housing which supports the motor section; and a lid member for closing an opening of the box main body. 
     
     
         13 . The in-wheel motor driving device according to  claim 12 , wherein the lid member seals the box main body with a sealing member. 
     
     
         14 . The in-wheel motor driving device according to  claim 8 , wherein the holder for anchoring the power supply wire is disposed on an inboard side of the outer circumference of the housing which supports the motor section. 
     
     
         15 . The in-wheel motor driving device according to  claim 14 , wherein the holder for anchoring the power supply wire is formed integrally with an inboard side of the outer circumference of the housing which supports the motor section. 
     
     
         16 . The in-wheel motor driving device according to  claim 1 , wherein the power supply wire is inserted into the terminal box via a sealing member. 
     
     
         17 . The in-wheel motor driving device according to  claim 1 , wherein the speed reducer section is provided by a cycloid reduction gear system. 
     
     
         18 . The in-wheel motor driving device according to  claim 8 , wherein the terminal box includes a box main body formed integrally with the housing which supports the motor section; and a lid member for closing an opening of the box main body. 
     
     
         19 . The in-wheel motor driving device according to  claim 10 , wherein the terminal box includes a box main body formed integrally with the housing which supports the motor section; and a lid member for closing an opening of the box main body. 
     
     
         20 . The in-wheel motor driving device according to  claim 10 , wherein the holder for anchoring the power supply wire is disposed on an inboard side of the outer circumference of the housing which supports the motor section. 
     
     
         21 . The in-wheel motor driving device according to  claim 8 , wherein the power supply wire is inserted into the terminal box via a sealing member. 
     
     
         22 . The in-wheel motor driving device according to  claim 10 , wherein the power supply wire is inserted into the terminal box via a sealing member. 
     
     
         23 . The in-wheel motor driving device according to  claim 8 , wherein the speed reducer section is provided by a cycloid reduction gear system. 
     
     
         24 . The in-wheel motor driving device according to  claim 10 , wherein the speed reducer section is provided by a cycloid reduction gear system.