JPH0524959U - Drive device for vehicle actuator - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] To simplify the structure and reduce the battery load in a vehicle actuator drive device that uses a starter motor. [Structure] A motor drive circuit 14 for rotating the starter motor 1 for driving the hydraulic pump 3 and for using it for starting the engine is provided, and the starter motor 1 and the hydraulic pump 3 are connected via a one-way clutch 9. Then, the power of the starter motor 1 is transmitted to the hydraulic pump 3 only when the pump is operating, and is cut off when the engine is started.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a drive device for a vehicle actuator that uses a starter motor as a drive source.

[0002]

[Prior Art]

 As a drive device for a vehicle actuator such as a hydraulic pump for power steering, a drive device utilizing the power of a starter motor has been conventionally devised.

In this drive device, a meshing mechanism for a ring gear on the engine side is provided at one end of a drive shaft of a starter motor, while the other end of the drive shaft is connected to a rotary shaft of an actuator via an electromagnetic clutch. A circuit is built in such a way that the pair of the starter motor and the meshing mechanism, or the starter motor and the electromagnetic clutch are turned on by the rotational position of the key switch for starting the engine. That is, when the key switch is turned to the START position, this drive device turns on the starter motor and the meshing mechanism to start the engine, and when the key switch is in another position (ON or OFF). Position), the starter motor and the electromagnetic clutch are turned on to drive the actuator.

Incidentally, this similar structure is shown, for example, in Japanese Utility Model Laid-Open No. 59-140966.

[0005]

[Problems to be solved by the device]

 However, in the case of this conventional drive device, since the power transmission and disconnection between the starter motor and the actuator are performed by the electromagnetic clutch, the structure itself is complicated and the electromagnetic clutch is turned on. There is a problem that the battery load is heavy.

Therefore, the present invention is intended to provide a drive device for a vehicle actuator having an extremely simple structure and a small battery load.

[0007]

[Means for Solving the Problems]

 As a means for solving the above-mentioned problems, the present invention is directed to a vehicle actuator drive device using a starter motor in the opposite directions when the starter motor is used to drive the actuator and when it is used to start the engine. A motor drive circuit for rotating the motor was provided, and the starter motor and actuator were connected via a one-way clutch.

[0008]

[Action]

 When the starter motor rotates in a predetermined direction to connect the one-way clutch, the power of the starter motor is transmitted to the actuator and drives the actuator. Also, when the starter motor rotates in the opposite direction (direction to disengage the one-way clutch), the power of the starter motor is not transmitted to the actuator side and the engine can be started.

[0009]

【Example】

 Next, an embodiment of the present invention will be described with reference to FIG.

In FIG. 1, 1 is a starter motor for starting an engine mounted on a vehicle, 2 is a flywheel of the engine, 3 is a hydraulic pressure for power steering as an actuator for the vehicle. It is a pump. A pinion gear 5 is provided on one end side of the drive shaft 4 of the starter motor 1 so as to be able to move forward and backward. And the pinion gear 5 mesh with each other so that the dynamic force of the starter motor 1 is transmitted to the flywheel 2. Further, the other end of the drive shaft 4 of the starter motor 1 and the rotary shaft 8 of the hydraulic pump 3 are connected via a one-way clutch 9 such as a spring clutch or a sprag clutch, and only when the starter motor 1 rotates in a predetermined direction. The power is transmitted to the hydraulic pump 3. In the figure, 10 is an oil tank, 11 is a pressure adjusting valve, 12 is a rotation sensor attached to the hydraulic pump 3, and 13 is a cylinder for assisting power steering.

Reference numeral 14 is a motor drive circuit for the starter motor 1, and reference numeral 15 is a control circuit for outputting a control signal to the motor drive circuit 14 and the magnet switch 6. The motor drive circuit 14 receives a signal from the control circuit 15 to rotate the starter motor 1. However, the starter motor 1 is rotated in the opposite direction depending on whether the engine is started or the hydraulic pump 3 is driven. It is designed to rotate. A key switch 16 for starting the engine is connected to the input side of the control circuit 15. When a signal corresponding to the rotational position of the key switch 16 is input to the control circuit 15, the control circuit 15 drives the motor. A signal is appropriately output to the circuit 14 and the magnet switch 6. Further, a vehicle speed sensor 17, a steering torque sensor 18, a rotation sensor 12 and the like are further connected to the input side of the control circuit 15, and when the hydraulic pump 3 is driven, an optimum flow rate according to the vehicle speed and the steering torque is obtained. The rotational speed of the hydraulic pump 3 can be controlled so that

In the above configuration, when the key switch 16 is rotated to the START position when the engine is started, the control circuit 15 causes the motor drive circuit 14 to rotate the starter motor 1 in a predetermined direction (direction in which the one-way clutch 9 becomes free). It outputs a signal to cause the magnet switch 6 to output an ON signal. As a result, the starter motor 1 rotates in a predetermined direction, the pinion gear 5 moves forward and meshes with the ring gear 7, and the power of the starter motor 1 is transmitted to the flywheel 2. At this time, the power of the starter motor 1 is not transmitted to the hydraulic pump 3 because the rotation direction of the starter motor 1 is the direction in which the one-way clutch 9 is released.

When the key switch 16 is in the ON or OFF position, the control circuit 15 causes the motor drive circuit 14 to move the starter motor 1 in the opposite direction (direction in which the one-wake latch 9 locks). ), And the OFF signal to the magnet switch 6. As a result, the starter motor 1 rotates in the direction opposite to the above with the pinion gear 5 retracted (the state in which it does not mesh with the ring gear 7), and the hydraulic pump 3 is rotated via the one-way clutch 9.

In the case of this drive device according to the present invention, the structure is extremely simple without using magnetic force, etc. Since the power transmission and cutoff between the starter motor 1 and the hydraulic pump 3 is performed by the one-way clutch 9, the entire device is In addition to being able to be miniaturized and manufactured at low cost, it also has the advantage that the battery load is small and the electric circuit configuration can be simplified.

This drive device is not limited to a hydraulic pump for power steering, but can be used for a hydraulic pump for four-wheel steering, antilock brake, hydraulic fan, hydraulic clutch, etc. It can be used not only for hydraulic pumps but also for other vehicle actuators.

[0016]

[Effect of the device]

 As described above, the present invention provides a motor drive circuit that rotates in opposite directions when the starter motor is used to drive the actuator and when it is used to start the engine, and the starter motor and the actuator are connected via a one-way clutch. The connection between the starter motor and the actuator enables transmission and disconnection of power without using an electromagnetic clutch with a complicated structure and large battery load.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram showing an embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Starter motor, 3 ... Hydraulic pump (vehicle actuator), 9 ... One way clutch, 14 ... Motor drive circuit.

Claims (1)

[Scope of utility model registration request] 1. A vehicle actuator drive device using a starter motor, wherein a motor drive circuit for rotating the starter motor in the opposite direction is used when the starter motor is used to drive the actuator and when the starter motor is used to start the engine. A drive device for a vehicle actuator, characterized in that a motor and an actuator are connected via a one-way clutch.