JPH0343758Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention provides a method for connecting a control device installed under the floor of an electric vehicle between the control device and the wiring duct in an outfitting line that is wired via a wiring duct. The present invention relates to an applied magnetic shielding device for outfitting wires.

[Technical background of the invention and its problems]

Generally, in the case of an electric vehicle, as shown in FIG. 5 and gasket 6 to be connected to electrical components housed within the control device 2.

In this way, a large number of equipment wires 4 are usually led into the control device 2 from other devices via the wiring duct 3 in order to function as part of the system.

For this reason, magnetic flux s leaks from the equipment wire 4 between the control device 2, such as a chopper device or an inverter device, and the wiring duct 3, causing a problem of induction failure that causes the ground side signal system to malfunction.

Since this problem of induction interference can cause serious failures in electric vehicles, it is necessary to take measures against induction interference in the outfitting line 4 between the control device 2 and the wiring duct 3. Note that there are two types of magnetic flux s that cause this induction disturbance: DC magnetic flux and AC magnetic flux fluctuation due to harmonic components, but the problem here is the case due to AC magnetic flux fluctuation.

That is, in general, a magnetic shielding material is used as a member for the control device 2 mounted under the floor of the vehicle body 1 and the wiring duct 3 that houses a large number of rigging wires 4 wired between the control devices 2 and 2 as a countermeasure against induction disturbances. This prevents magnetic flux s from leaking to the ground from the control device 3 and the outfitting wires 4 in the wiring duct 2.

However, the rigging wire 4 between the control device 2 and the wiring duct 3 does not have a storage part using a magnetic shielding material, and the magnetic flux s from the rigging wire 4 leaks to the ground and causes an induction problem.

For this reason, it is necessary to provide magnetic shielding to the outfitting wire 4 between the control device 2 and the wiring duct 3 in consideration of countermeasures against induction disturbances.

Therefore, conventionally, there is a magnetic shielding device configured as shown in FIG.

That is, after the outfitting wire 4 from the wiring duct 3 is drawn into the control device 2, a concave shield plate 8 made of a non-magnetic and highly conductive material is provided at the bottom of the outfitting wire 4, and both sides of the concave shield plate 8 are connected to bolts 9... It has a structure in which it is fixed and attached to the control device 2 and the wiring duct 3 at several locations.

According to such a structure, since both sides of the shield plate 8 are joined to the control device 2 and the wiring duct 3, respectively, leakage of the magnetic flux s from the gap therebetween can be prevented.

However, there is a problem in that leakage of the magnetic flux s from the gap 10 between the vehicle body 1 and both ends of the shield plate 8 cannot be prevented.

Therefore, as shown in FIG. 6, there is a device in which the shield plate 8 is shaped like a duct, but in this device, a large number of outfitted wires from the wiring duct 3 are connected while the operator is supporting the duct-shaped shield plate 8. 4 to shield plate 8
After inserting the electric wire along the arrow a, passing through the electric wire cleat 5 and packing 6, and drawing it into the control device 2, it is necessary to attach the shield plate 8.

Therefore, when the shield plate 8 is made into a duct shape, the work of pulling in the rigging wire 4 requires handling the rigging wire 4 and the shield plate 8 at the same time, which deteriorates work efficiency. Moreover, the shield plate 8 is equipped with the rigging wire 4 in advance.
It is necessary to provide an insertion hole 11 and a pull-out hole 12, which results in a problem that the structure becomes complicated.

Furthermore, as shown in FIGS. 5 and 6, the shield plate 8 needs to be installed to cover a large number of rigging lines 4, so it is required to have a large width and length. is relatively large and the installation work is extremely difficult. Furthermore, such a shield plate 8 occupies a large space in the rigging space under the floor, resulting in poor workability in maintenance and inspection of the control device 2.

[Purpose of invention]

The present invention was developed based on the above circumstances, and its purpose is to prevent leakage of magnetic flux from the rigging lines to the ground side, and to
It is an object of the present invention to provide a magnetic shield for an outfitting line that can improve the workability of the magnetic shielding of the outfitting line and the maintenance and inspection workability of a control device.

[Summary of the idea]

In order to achieve the above object, the present invention has developed a flexible and magnetic shield that is made of a bellows-shaped member made of a non-magnetic material and a good conductor to connect the wiring between the control device mounted under the floor of the vehicle body and the wiring duct. It is characterized by being housed in a hollow pipe that has a function.

[Example of idea]

Hereinafter, one embodiment of the present invention will be described with reference to FIGS. 1 to 3.

In the figure, 1 is the body of an electric vehicle, and a control device 2 and a wiring duct 3 are mounted under the floor of this body 1. An outfitting line 4 is guided into the control device 2 through this wiring duct 3.

Also, between the control device 2 and the wiring duct 3 is a magnetically shielded pipe 21 that accommodates the outfitting wire 4.
The magnetically shielded pipe 21 includes a bellows-shaped hollow pipe 22 made of a non-magnetic material and a good conductor, such as aluminum, and which has a flexible and magnetic shielding function.
2, and flanges 23a and 23b provided at both ends of the flange 23a and 23b. In addition, both flanges 23
a, 23b have fitting wire insertion holes 24a, 24b,
Bolt insertion holes 25a..., 25b, protrusions 26a, 2
6b is provided. One end of this magnetically shielded pipe 21 is fitted with a waterproof gasket 27a after inserting the rigging wire 4 led out from the wiring duct 3 through the rigging wire insertion hole 24a of one flange 23a.
By inserting the bolts 28a into the bolt insertion holes 25a of the flange 23a and tightening them,
It is fixed to the wiring duct 3. Also, the other end is
After the rigging wire 4 led out from the rigging wire insertion hole 24b of the other flange 23b is drawn into the control device 2, the waterproof packing 27b is sandwiched between the flange 23b.
It is fixed to the control device 2 by inserting and tightening the bolts 28b into the bolt insertion holes 25b. Note that the protrusions 26a and 26b provided on the flanges 23a and 23b at both ends are inserted into the control device 2 and the wiring duct 3 through waterproof gaskets 27a and 27b.

According to the above configuration, the wiring duct 3 and the control device 2 are connected by the magnetically shielded pipe 21, and the rigging wire 4 led from the wiring duct 3 to the control device 2 is housed in the magnetically shielded pipe 21. Therefore, leakage of the magnetic flux s from the outfitting line 4 to the ground side can be prevented. Moreover, the flanges 23 at both ends
Protrusions 26a, 26b provided on a, 23b
Since the waterproof gaskets 27a and 27b are penetrated and inserted into the control device 2 and the wiring duct 3, leakage of the magnetic flux s from the thick portions of the waterproof gaskets 27a and 27b can also be prevented.

Furthermore, since the magnetically shielded pipe 21 is a flexible hollow pipe 22 with a bellows-shaped center, the rigging wire 4 can be pulled in by bending without applying excessive force to the inserted rigging wire 4. At the same time, the workability of magnetic shielding of the outfitting wire 4 can be improved. Moreover, since no extra space is required under the floor of the vehicle body 1, the space under the floor of the vehicle body 1 can be simplified, and the maintenance and inspection workability of the control device 2 can be improved.

The magnetically shielded pipe 21 may be attached using a simple connector, such as a screw-in type using a cap nut.

Furthermore, the case is not limited to the case where one outfitting wire 4 is inserted into the magnetically shielded pipe 21; for example, in the case of a polar outfitting wire 4 or a three-phase outfitting wire 4, several outfitting wires are inserted at once. 4 may be inserted.

[Effect of idea]

As explained above, according to the present invention, leakage of magnetic flux from the rigging line to the ground side can be prevented,
In addition, excellent effects such as improved workability for magnetic shielding of outfitting wires and improved workability for maintenance and inspection of the control device can be achieved.

[Brief explanation of the drawing]

Figures 1 to 3 show an embodiment of the present invention. Figure 1 is a partially cutaway front view of the magnetically shielded pipe attached to the vehicle body, and Figure 2 is the partially cutaway front view of the magnetically shielded pipe attached to the vehicle body. Figure 3 is a front view showing the same magnetically shielded pipe, Figure 4 is a partially cutaway front view showing how the rigging wires are drawn into the control device, and Figure 5 is a conventional view using a shield plate. FIG. 6 is a partially cutaway front view of another conventional example using a shield plate. 1... Vehicle body, 2... Control device, 3... Wiring duct, 4... Outfitting wire, 21... Magnetic shield pipe.

Claims (1)

[Scope of utility model registration request] The control device installed under the floor of the vehicle body and the wiring duct are connected by a hollow pipe made of a bellows-shaped member made of non-magnetic material and a good conductor, and has a flexible and magnetic shielding function, and inside this pipe, A magnetic shielding device for rigging wires, characterized in that the rigging wires are accommodated to be guided to the control device via the wiring duct.