JP2009207248A - Running state changing device for electric vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a running state changing device for electric vehicle, wherein when an ignition switch is turned off, a change lever is set to a neutral position. <P>SOLUTION: The running state changing device is installed with the change lever whose position is changed among multiple positions including the neutral position; a holding means for electromagnetically holding the position of the change lever; a biasing means for mechanically biasing the change lever to the neutral position; and the ignition switch provided between an electromagnet of the holding means and a power supply. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a traveling state switching device for switching a traveling state of an electric vehicle.

As this type of technology, the technology described in Patent Document 1 is disclosed. This gazette discloses one that performs forward and reverse selection operations using a shift lever.
JP-A-8-163713

  In the above prior art, for example, if the ignition switch is turned on from off while keeping the shift lever in the forward position, there is a risk of unintended start.

  The present invention has been made paying attention to the above problems, and an object of the present invention is to provide a traveling state switching device for an electric vehicle in which a switching lever is in a neutral position when an ignition switch is turned off.

  In order to achieve the above object, in the traveling state switching device for an electric vehicle of the present invention, a switching lever for switching a plurality of positions including a neutral position, a holding means for electromagnetically holding the position of the switching lever, and the switching lever And an ignition switch provided between an electromagnet of the holding means and a power source.

  For this reason, when the ignition switch is turned off, the switching lever can be set to the neutral position.

  Hereinafter, the best mode for realizing a traveling state switching device for an electric vehicle according to the present invention will be described based on a first embodiment.

[Constitution]
The configuration of the forward / reverse switching device 1 for an electric vehicle according to the first embodiment will be described. The forward / reverse switching device 1 switches between forward and reverse travel of the electric vehicle. The forward / reverse switching lever 2 is moved forward by a driver's operation and moved backward when moved to a backward position.
FIG. 1 is a configuration diagram of the forward / reverse switching device 1, and FIG. 2 is a cross-sectional view of the housing 7 of the forward / backward switching device 1. The forward / reverse switching device 1 includes a forward / reverse switching lever 2 that switches between a forward position, a reverse position, and a neutral position by a driver's operation, a forward position detection switch 3 that detects that the forward / backward switching lever 2 is in the forward position, A reverse position detection switch 4 for detecting that the forward / reverse switch lever 2 is in the reverse position, a push-pull solenoid 5 for holding the forward / reverse switch lever 2 in the forward position or the reverse position, and the forward / reverse switch lever 2 in the neutral position. And a coil spring 6 that biases it back.

  The forward / reverse switching lever 2 is formed in a rod shape, and is rotatably supported by the housing 7 at the central lower portion in the longitudinal direction. A coil spring 6 is provided at a support portion between the forward / reverse switching lever 2 and the housing 7, and the forward / backward travel is performed when the driver does not hold the forward position and the reverse position by the push-pull solenoid 5. The switching lever 2 is urged to return to the neutral position.

  FIG. 3 is a sectional view of the push-pull solenoid 5. The push-pull solenoid 5 includes an electromagnet 9 that generates a magnetic force when energized, a yoke 10 that houses the electromagnet 9, a mover 11 that is movable by the magnetic force of the electromagnet 9, and a shaft 8 that moves integrally with the mover 11.

The shaft 8 of the push-pull solenoid 5 is connected so as to be rotatable below the support portion between the forward / reverse switching lever 2 and the housing 7 described above. The push-pull solenoid 5 applies a force in the direction of pulling the shaft 8 to the mover 11 when a current is applied to the electromagnet 9 in one direction, and applies a force in the direction of pushing the shaft 8 to the mover 11 when a current is applied in the opposite direction. Make it work.
When the electromagnet 9 of the push-pull solenoid 5 is energized, the forward / reverse switching lever 2 is held at the forward position and the reverse position against the urging force of the coil spring 6 by the force acting on the shaft 8. Even when the electromagnet 9 of the push-pull solenoid 5 is energized, it is set so that the driver can operate to another position with a relatively light force.

  Next, the circuit configuration of the forward / reverse switching device 1 will be described. A power source 13 is connected to the forward position detection switch 3 and the reverse position detection switch 4. Between the power source 13 and the forward position detection switch 3 and the reverse position detection switch 4, there is provided an ignition switch 12 for energizing and shutting off. An electromagnet 9 of the push-pull solenoid 5 is connected to one end of the coil 9 and the forward position detection switch 3, and is connected to the other end of the coil 9 and the reverse position detection switch 4.

  The forward position detection switch 3 and the reverse position detection switch 4 are connected to the ground 14. The forward position detection switch 3 and the reverse position detection switch 4 output position information of the forward / reverse switching lever 2 to the electronic control unit 15. The electronic control unit 15 switches between forward control and reverse control of the vehicle based on the position information of the forward / reverse switching lever 2.

  The forward position detection switch 3 and the reverse position detection switch 4 energize the ignition switch 12 and the push-pull solenoid 5 when turned on, and connect the ground 14 and the push-pull solenoid 5 when turned off.

[Action]
For example, if the ignition switch 12 is switched from OFF to ON while the forward / reverse switching lever 2 is in the forward position, there is a risk of unintentional starting.

Therefore, in the forward / reverse switching device 1 of the first embodiment, the forward / reverse switching lever 2 is urged to be in the neutral position by the coil spring 6 and is held at the forward position and the reverse position by the electromagnetic force of the push-pull solenoid 5. did.
FIG. 4 is a diagram of the forward / reverse switching device 1 when the forward / reverse switching lever 2 is set to the forward position, and FIG. 5 is a circuit diagram of the forward / backward switching device 1.

  When the forward / reverse switching lever 2 is set to the forward position, the forward position detection switch 3 is turned on and the reverse position detection switch 4 is turned off. If the ignition switch 12 is on at this time, the circuit is as shown in FIG. That is, the forward position detection switch 3 connects the power source 13 and the push-pull solenoid 5 via the ignition switch 12, and the reverse position detection switch 4 connects the grant 15 and the push-pull solenoid 5. At this time, the current flows as shown by an arrow in FIG. 5A, and the push-pull solenoid 5 acts in the direction in which the shaft 8 is pulled, and the forward position even if the driver releases his / her hand from the forward / reverse switching lever 2. Hold on.

  On the other hand, when the forward / reverse switching lever 2 is set to the reverse position, the reverse position detection switch 4 is turned on and the forward position detection switch 3 is turned off. If the ignition switch 12 is on at this time, the circuit is as shown in FIG. That is, the reverse position detection switch 4 connects the power source 13 and the push-pull solenoid 5 via the ignition switch 12, and the forward position detection switch 4 connects the grant 15 and the push-pull solenoid 5. At this time, the current flow is as shown by the arrow in FIG. 5B, and the push-pull solenoid 5 acts in the direction of pushing the shaft 8, and the reverse position even if the driver releases the forward / reverse switching lever 2. Hold on.

  When the ignition switch 12 is off, no current flows through the push-pull solenoid 5 even if the forward / reverse switching lever 2 is in the forward or reverse position. Accordingly, no electromagnetic force acts on the push-pull solenoid 5, so that the position of the forward / reverse switching lever 2 cannot be maintained, and the forward / reverse switching lever 2 returns to the neutral position by the biasing force of the coil spring 6. Therefore, when the ignition switch 12 is off, both the forward position detection switch 3 and the reverse position detection switch 4 are off as shown in FIG.

[effect]
Next, effects of the forward / reverse switching device 1 of the first embodiment will be listed below.

  (1) The forward / reverse switching lever 2 for switching the forward position, the reverse position and the neutral position, and the position of the forward / reverse switching lever 2 is electromagnetically held when the forward / backward switching lever 2 is operated to the forward position or the reverse position. The push-pull solenoid 5 is provided, the coil spring 6 that mechanically biases the forward / reverse switching lever 2 to the neutral position, and the ignition switch 12 provided between the electromagnet 9 of the push-pull solenoid 5 and the power source 13.

  Therefore, when the ignition switch 12 is turned off, the holding of the position of the forward / reverse switching lever 2 by the push-pull solenoid 5 is released, and it can be returned to the neutral position by the urging force of the coil spring 6. Therefore, an unintended start can be suppressed when the ignition switch 12 is turned on from off.

(2) The position of the forward / reverse switching lever 2 is held by the push-pull solenoid 5.
Therefore, it is possible to hold two positions (forward position and reverse position) with one member, and the number of parts can be suppressed.

(3) The forward / reverse switching lever 2 is biased to the neutral position by the coil spring 6.
Therefore, when the electromagnetic force of the push-pull solenoid 5 is lost, the forward / reverse switching lever 2 can be reliably returned to the neutral position.

[Other embodiments]
The best mode for carrying out the present invention has been described based on the first embodiment. However, the specific configuration of the present invention is not limited to the first embodiment and does not depart from the gist of the present invention. Any change in the design of the range is included in the present invention.

  For example, in the first embodiment, the example has been described in which the forward / reverse position switching lever 2 switches between the forward position, the neutral position, and the reverse position, but two positions may be used, and four or more positions may be switched. Also good. That is, it is only necessary that the operation position of the switching lever can be held by electromagnetic force when the ignition switch is on, and can be returned to the neutral position by mechanical urging force when the ignition switch is off.

  For example, the forward / reverse position of the forward / reverse switching lever 2 is held by the push-pull solenoid 5. However, the forward / reverse switching lever 2 is made of a magnetic material, and an electromagnet is placed near the forward position and the reverse position. Sometimes, the forward / reverse switching lever 2 may be adsorbed.

  Further, although the forward / reverse switching lever 2 is biased to the neutral position by the coil spring 6, it may be biased by another spring.

1 is a diagram of a forward / reverse switching device according to a first embodiment. It is sectional drawing of the housing of the forward / reverse switching device of Example 1. It is sectional drawing of the push pull solenoid of Example 1. FIG. It is a figure when the forward / reverse switching lever of Example 1 is set to the forward movement position. 1 is a circuit diagram of a forward / reverse switching device of Embodiment 1. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Forward / reverse switching device 2 Forward / backward switching lever 5 Push-pull solenoid 6 Coil spring 9 Electromagnet 12 Ignition switch

Claims (3)

A switching lever that switches between multiple positions including the neutral position;
Holding means for electromagnetically holding the position of the switching lever;
Biasing means for mechanically biasing the switching lever to a neutral position;
An ignition switch provided between an electromagnet of the holding means and a power source;
A traveling state switching device for an electric vehicle characterized by comprising: The traveling state switching device for an electric vehicle according to claim 1,
The electric vehicle traveling state switching device, wherein the holding means is a push-pull solenoid. In the traveling state switching device for an electric vehicle according to claim 1 or 2,
The driving state switching device for an electric vehicle, wherein the biasing means is a coil spring.

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