Electric cable drive device and electric brake device
An cable drive device ( 10 ) having a motor (M), a speed reducer (G), a nut member ( 26 ) connected to the speed reducer, a rod ( 32 ) screwed to the nut member ( 26 ) and guided by a guide member ( 34 ) so as not to rotate, a control cable ( 15 ) composed of an inner cable ( 45 ) connected to the rod and a guide tube ( 49 ) for guiding the inner cable, a sensor for detecting the amount of operation of the cable based on the amount of rotation of the speed reducer (G), and a load sensor ( 17 ) for detecting a load applied to the cable. An electric brake device can be obtained by connecting the control cable and a brake mechanism of the cable drive device ( 10 ).
1. An electric cable drive device, comprising:
a motor;
a speed reducer connected to an output shaft of the motor;
a rotating member connected to an output shaft of the speed reducer;
a transducer converting a rotation of the rotating member into a linear motion of a linear motion member;
a cable connected to the linear motion member;
a load detecting means detecting a tension of the cable; and
a control means transmitting a warning signal when an output of the load detecting means exceeds a given tolerable range, and
wherein the rotating member of the transducer is a male screw, and the linear motion member is a nut member which screws together with the male screw, and
wherein the nut member comprises an equalizer in a condition capable of swinging.
2. A cable drive device according to claim 1 , wherein the control means halts the motor when the cable becomes unloaded in a paying out operation of the cable.
3. An electric cable drive device, comprising:
a motor;
a speed reducer connected to an output shaft of the motor;
a rotating member connected to an output shaft of the speed reducer;
a transducer converting a rotation of the rotating member into a linear motion of a linear motion member;
a cable connected to the linear motion member; and
a detecting means detecting an amount of operation of the cable;
wherein, the detecting means comprises a conversion means which counts pulses from an output of a pulse generating means generating pulses in proportion to a rotation of the motor, and converts into an amount of operation of the cable,
wherein the rotating member of the transducer is a male screw, and the linear motion member is a nut member which screws together with the male screw, and
wherein the nut member comprises an equalizer in a condition capable of swinging.
4. A cable drive device according to claim 3 , 1 , or 2 , wherein the rotating member of the transducer comprises a female screw, and the linear motion member is a male screw which screws together with the female screw of the rotating member.
5. A cable drive device according to claim 1 or 2 , wherein the load detecting means comprises a strain gage.
6. A cable drive device according to claim 3 or 1 , wherein the nut member comprises a grease chamber.
7. A cable drive device according to claim 3 , 1 , or 2 , wherein the cable operates a parking brake of an automobiles.
8. A cable drive device according to claim 7 , wherein the motor is a brushless motor, and the pulse generating means determining the excitation timing of the coil phase of the drive mechanism is provided in a brushless motor.
9. An electric cable drive device, comprising:
a motor;
a speed reducer connected to an output shaft of the motor;
a rotating member connected to an output shaft of the speed reducer;
a transducer converting a rotation of the rotating member into a linear motion of a linear motion member;
a cable connected to the linear motion member;
a load detecting means detecting a tension of the cable; and
a control means transmitting a warning signal when an output of the load detecting means exceeds a given tolerable range, and
wherein the load detecting means comprises a spring which elastically deforms against the tensile force of the cable, and a detecting means detecting a deformation of the spring.
10. An electric cable drive device, comprising:
a motor;
a speed reducer connected to an output shaft of the motor;
a rotating member connected to an output shaft of the speed reducer;
a linear motion member converting a rotation of the rotating member into a linear motion of a linear motion member, screwing together with the rotating member;
a cable connected to the linear motion member;
an emergency release mechanism releasing an operating physical force of the cable by an external operation,
wherein the emergency release mechanism comprises a rotating means rotating the rotating member from outside, and
wherein an end of the rotating means is protruding from a housing of the speed reducer, and the rotating means rotating the rotating member is an engaging part having a square cross section provided on the protruding end of the rotating member.
11. An electrical parking brake device for automobiles comprising:
the cable drive device comprising:
a motor;
a speed reducer connected to an output shaft of the motor;
a rotating member connected to an output shaft of the speed reducer;
a transducer converting a rotation of the rotating member into a linear motion of a linear motion member;
a cable connected to the linear motion member; and
a detecting means detecting an amount of operation of the cable;
wherein, the detecting means comprises a conversion means which counts pulses from an output of a pulse generating means generating pulses in proportion to a rotation of the motor, and converts into an amount of operation of the cable,
a brake lever to which the cable of the brake device or the inner cable is connected; and
the spring energizing the brake lever to the release side of the brake; and
a friction member for the brake connected to the brake lever.
12. An electric cable drive device, comprising:
a motor;
a speed reducer connected to an output shaft of the motor;
a rotating member connected to an output shaft of the speed reducer;
a linear motion member converting a rotation of the rotating member into a linear motion of a linear motion member, screwing together with the rotating member;
a cable connected to the linear motion member;
an emergency release mechanism releasing an operating physical force of the cable by an external operation,
wherein the emergency release mechanism comprises a rotating means rotating the rotating member from outside, and
wherein the control cable is a pull control cable operating a brake, and wherein a tension by a return spring of the brake is always applied to the inner cable of the pull control cable.
13. An electric cable drive device, comprising:
a motor;
a speed reducer connected to an output shaft of the motor;
a rotating member connected to an output shaft of the speed reducer;
a transducer converting a rotation of the rotating member into a linear motion of a linear motion member;
a cable connected to the linear motion member;
a load detecting means detecting a tension of the cable; and
a control means transmitting a warning signal when an output of the load detecting means exceeds a given tolerable range, and
wherein the load detecting means comprises a spring which elastically deforms against the tensile force of the cable, and a detecting means detecting a deformation of the spring,
wherein the control means halts the motor when the cable becomes unloaded in a paying out operation of the cable.
14. An electrical parking brake device for automobiles comprising:
the cable drive device comprising:
a motor;
a speed reducer connected to an output shaft of the motor;
a rotating member connected to an output shaft of the speed reducer;
a transducer converting a rotation of the rotating member into a linear motion of a linear motion member;
a cable connected to the linear motion member;
a load detecting means detecting a tension of the cable;
a control means transmitting a warning signal when an output of the load detecting means exceeds a given tolerable range;
a brake lever to which the cable of the brake device or the inner cable is connected; and
the spring energizing the brake lever to the release side of the brake; and
a friction member for the brake connected to the brake lever.
15. An electrical parking brake device for automobiles comprising:
the cable drive device comprising:
a motor;
a speed reducer connected to an output shaft of the motor;
a rotating member connected to an output shaft of the speed reducer;
a linear motion member converting a rotation of the rotating member into a linear motion of a linear motion member, screwing together with the rotating member;
a cable connected to the linear motion member;
an emergency release mechanism releasing an operating physical force of the cable by an external operation, wherein the emergency release mechanism comprises a rotating means rotating the rotating member from outside;
a brake lever to which the cable of the brake device or the inner cable is connected; and
the spring energizing the brake lever to the release side of the brake; and
a friction member for the brake connected to the brake lever.