JPS59141254A - Electric apparatus box for car - Google Patents

Abstract

PURPOSE:To facilitate routine inspection, and to improve maintenance and inspection property by bringing an electric apparatus to a rotatable state while forming the electric apparatus in structure in which the apparatus can be mounted or demounted easily. CONSTITUTION:When inspecting a gate drive unit 60 for a semiconductor for a chopper device, a fitting bolt 56 is removed, and the unit 60 is turned while using a roller 64 as a fulcrum. A long hole 63A for a link 63 and a shaft bolt 67 slide, and the unit 60 is kept at an inclined position. When the unit 60 is mounted or demounted, a circular section 62A at the nose of a link 62 placing on a roller receiving fitting 68 is slipped off when pulling a handle 61B, and the roller 64 is slipped off, and the unit 60 can be removed from an outer box 2.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a box structure for electrical equipment mounted on an electric vehicle. In particular, since the electrical equipment mounted on an electric vehicle is installed in a limited space under the floor of the vehicle, the electrical equipment is required to be more compact.

On the other hand, due to the principle of on-time operation and the fact that human life is at stake in the event of an accident, electric vehicles require frequent maintenance inspections to discover and repair electrical equipment failures before they occur, and there is a strong demand for easy maintenance inspections. be done.

In addition to the above-mentioned special conditions for a vehicle electrical device, it is necessary to satisfy conditions for ensuring the performance of the electrical device.

The present invention attempts to divide the outer box in order to satisfy the various conditions mentioned above, construct a second outer box below the first outer box, and open and close the second outer box to facilitate maintenance and inspection. This relates to the opening/closing and attachment/detachment structure of the second outer box.

A case in which the present invention is applied to a semiconductor device such as a chopper device for a vehicle will be described in detail below.

FIG. 1 is a cross-sectional configuration diagram of a chopper device that controls the speed of a main motor of an electric vehicle, and shows the prior art of the present invention.

In this figure, the semiconductor device (1) is placed in the first outer box (2).
The semiconductor cooling unit (3) and the semiconductor (6A) are connected in series or parallel to each other, and electric equipment (4) such as an accelerator is housed inside.

The semiconductor cooling unit (3) has a built-in semiconductor block (6) in which semiconductors (6A) and cooling fins (6B) are stacked alternately and assembled into a rod shape using a tightening device (not shown).
t: Cooling, consisting of 9 tanks (7) and a condenser (8).

The cooling tank (7) and the condenser (8) communicate with each other through a steam pipe (9) and a throttle pipe +tl. Cooling tank (7
) is filled with a condensable cooling medium (hereinafter referred to as the refrigerant) such as fluorocarbon (1) so as to immerse the semiconductor stack (6).
η fi4, and the upper interior of the cooling tank (7) and the interior space of the condenser (8) are filled with refrigerant vapor.

Bushings (c) are provided on the wall of the cooling tank (7), the bushings (c) are for the main circuit, and the bushings (b) are for gate signals, and the required number of each bushing is provided.

A partition plate (2 people) is provided in the outer box (2), and this partition plate (2
A) is provided with a hole (2B), and the bushing G141 of the cooling rank (7) is configured to pass through this hole (2B), and the cooling tank (7) and the partition plate (2A) are connected to each other. is sealed with a gasket (6).

The right part of the partition plate (2A) in Figure 1, that is, the outer box (
2) Ceiling plate (2C), bottom plate (2D), partition plate (2)
The area surrounded by A) and the inspection cover (2) is the closed chamber (
The electrical equipment (4) and the terminal block (5) are installed in this sealed chamber (201), and the bushing (c) of the semiconductor cooling unit (3), the electrical equipment (4), and the terminal block (201) are installed.
5) are electrically connected to each other by conductors (14A) and (14B). The terminal block 15) is provided to connect wiring between the semiconductor device (1) shown in FIG. 1 and external equipment (not shown).

- The left side of the partition plate (2A) is equipped with a protective cover Qψ,a made of a metal plate with holes or gold steel, which is used to air air for cooling the condenser (8) of the semiconductor unit +3). An open chamber (202) is formed to allow the flow of water.

A gate drive unit (4) for the semiconductor (6A) is disposed at the bottom of the outer box (2). A drive circuit board 12 is housed therein.

An opening (2E) is provided in the bottom plate (2D) of the outer box (2), and a gasket is provided all around the upper opening of the end υ of the gate drive unit. When the unit wheel is attached to the bottom plate (2D) of the outer box (2), the opening (2E) of the bottom plate (2D) is closed by the box-1 of the gate drive unit wheel, and the gasket at the abutting part prevents outside air from entering. Configure to be airtight. This is G%T as a semiconductor
When using an O thyristor, the gate pulse current needs to have a peak value of around 100 A, and a gate drive unit that generates such a large gate pulse generates a large amount of heat due to internal power loss. Therefore, in order to dissipate the heat generated within the gate drive unit, the gate drive unit wheel is communicated with the sealed chamber (201) of the outer box (2), and the temperature in both chambers is made almost uniform by air convection. At the same time, heat is radiated to the outside from the wall surface of the sealed chamber (201) to reduce temperature rise.

FIG. 2 is a longitudinal cross-sectional view of the electric car, showing the electrical equipment mounted under the floor of the car body.

As shown in this figure, the electrical devices are mounted in two rows in the lengthwise direction of the vehicle body, so the semiconductor devices li! +1) Inspection should be performed toward the side of the vehicle (arrow A) rather than toward the center of the vehicle (arrow B).
) is much easier to do. For this reason, the first
In the semiconductor device shown in the figure, the semiconductor cooling unit (3) is installed in the side direction of the single device to facilitate attachment and detachment.

Therefore, it is necessary to take into account that maintenance and inspection of the gate drive unit can be performed in the direction of arrow A.

Attachment to the outside of the gate drive unit member (2) A hinge is provided at one end of the flange, and the other end is attached to the outer box with a bolt.If the Bordeaux is removed, the gate drive unit wheel will use the hinge as a fulcrum. It can be rotated as shown by the dashed line.

Therefore, maintenance and inspection of the gate drive unit Φ can be performed from arrow C.

However, in this device α, the gate drive unit wheel box A1) and the hinge! 54I, the hinge, and the outer box (2) are fixed with screws (not shown), so although it is possible to rotate the hinge light υ in the row shown in Figure 1 as a fulcrum, the gate drive unit To attach and detach the member, use the hinge! 3] It is necessary to remove the set screw, and the installation and removal work is the frontispiece.

The present invention is intended to eliminate the drawbacks of the devices according to the prior art described above, and provides a structure in which electric devices such as gate m-movement units can be rotated to facilitate daily inspection and can be easily attached and detached. It is something to do.

Hereinafter, one embodiment of the present invention will be described based on the drawings. The eighth factor is a diagram showing the configuration of a gate drive unit which is a main part of an embodiment of the present invention, FIG. 4 is a sectional view taken along the line IV--IV in FIG. 8, and FIG. It is a view seen from B. In this figure, a first link plate 4, a second link plate, and a roller 1641 are provided on the outer box of the second half.

The holding fitting (61A) is fixed to the box cover by welding or the like, and the roller and the first link are fixed to this holding fitting (61A) with a shaft Bordeaux. Roller and first link-
is constructed so that it can rotate around the axis Bordeaux.

The first link 121 and the second link are connected by a floating shaft, and the other end of the second link has an oval (68A
), and is configured to be able to slide by the length of an ellipse with respect to the front of the bolt (hereinafter referred to as the shaft bolt), which is a shaft fixed to the box width).

The No. 1 outer box (2) is provided with a metal fitting (hereinafter referred to as a metal fitting) 181 that serves as a roller holder that also serves as a guide, and this roller holder is placed on top of the metal fitting. A roller with @7F- at its tip and a circularly formed portion (62A) at the tip (on the opposite side of the roller) of the first link tGB are mounted. The other end of the gate drive unit 61 is made of Bordeaux and is fixed (8) to the outer box (2).

The gate r, iI! of the present invention configured as described above. Il
When inspecting unit M, use the mounting bolts IF, 14
If you remove 1, the gate 1iilK will be opened using Laura town) as the fulcrum.
Unit 91 rotates as shown by the dashed line in the figure. Along with this rotation, the second link is connected to the first link (61) by a floating shaft at one end, and the circular part (62A) at the tip of the first link is connected to the roller. Since the receiver is supported by a metal fitting, the floating shaft (7) does not move, but the elongated hole (68A) of the second link and the shaft bolt slide, and the second The gate drive unit is held in an inclined position by the link.

When attaching or detaching the gate drive unit, pull the handle (61B) in the direction of the arrow as shown in Figure 6 to release the roller holder ct =
The circular part (62A) at the tip of the first link (goods) that is placed on top of the metal fitting (goods) comes off, and as shown in Figure 7, only the roller holder (copper roller) is placed on top of the metal fitting (goods). 2. When you pull the handle (61B), the roller r14)
The roller holder can be removed from the metal fitting (2) and the gate drive unit example can be removed from the outer box (2).

The top surface of the box Ill of the gate drive unit is open, and a gasket In is attached to the entire opening island, and the gate drive unit is attached to the outer box (2) as shown in Figure 8. The closed chamber (201) of the outer box (2) is configured to communicate with the inside of the gate B movement unit.

Therefore, the heat generated in the gate drive unit becomes almost uniform in temperature between the gate drive unit and the sealed chamber (201) due to air convection, and is radiated from the wall of the outer box (2) that makes up the sealed chamber (201). Therefore, the temperature rise inside the gate drive unit can be reduced.

The semiconductor gate wiring of GTO'4 in the cooling tank is connected to the gate drive unit via the bushing (c) @rθ
This signal line (H) is wired as shown in Figure 8.
Since the wiring length can be shortened, the wiring inductance is also small, and the gate pulse current also has a steep rise (9).
di/dt), making it possible to achieve higher speeds and higher frequency semiconductor devices. If necessary, a connector ring may be provided on the signal line (signal line) to facilitate attachment and detachment of the wiring to the gate drive unit.

As described above, the present invention provides a second outer box below the first outer box (2), which connects the inside of the first box (2) and the outer box, and also allows the outside box to be turned off during the time. By tilting the box hood (box hood), the inside of the outer phase Iυ can be inspected through its opening, and furthermore, the outer box +31) can be easily attached and detached from the outer box (2). By storing the gate disturbance circuit board inside the box and forming the gate drive unit 11S, it is possible to construct a device that is easy to maintain and inspect.

Furthermore, in the present invention, when the outer i ill is tilted, the first link bulge, the second link - mb'! '1ll (transfer))
Since the inclined position is maintained by the support bolts 1η, there is no possibility of damage caused by accidentally dropping the outer case onto the L corner, and inspection can be easily performed.

As described above, the present invention is easy to remove from daily life (burning and storage) of electronic and paper packaging stored in a box, improves maintenance and inspection, and is extremely practical. be.

[Brief explanation of the drawing]

Fig. 1 is a vertical cross-sectional view showing the configuration of 62 electric paper boxes, which is the cutting-edge technology of the present invention, Fig. 2 is an explanatory diagram showing the concept of mounting the electrical equipment box under the floor of an electric car, and Fig. 8 is One fruit according to the present invention (
If
Photo 4: 31 is a cross-sectional view taken along the IV-N line of the 8th [4]
FIG. 5 is a plan view seen from the direction of arrow B in FIG. 8, and FIGS. 6 and 7 are views showing the state in which the second outer box is removed. Note that the same reference numerals in the figures indicate the same or corresponding parts. In the figure, +1) is semiconductor ≠ 1 yearning, (2) is i'han 1's evening 1
box, (3) is a semiconductor cooling unit, (4) is an electronics cooling unit.
1,9, (6A,) is a semiconductor, (6B) is a cooling fin, (6) is a semiconductor stack, (7) is a cooling tank, (
8) is the condenser, C is the gate Shinkansen line, lot is the gate P
iBf% unit, (61 is the second outer box, the bag is the first link, $+3) is the second link, - is the roller, - is the shaft bolt, Kago is the floating shaft, (Moe is the shaft body, the lever The roller is the body. Agent Shin Kuzuno - ・1 25

Claims (1)

[Claims] 1) An outer box for an electrical device mounted under the floor of a vehicle is divided into a first outer box and a second outer box, and the second outer box is located below the first outer box. In the electrical equipment box configured by arranging the first
a roller body formed on the outer box, a roller rotatably held in the second outer box, a first link 14M rotatably held on the second outer box, one end of which is rotatably held; A second link is connected to the other end of the first link by a floating shaft and has an oval hole at the other end, and is fixed at a predetermined position of the second box so that the oval can slide. the second outer box is installed on the first outer box with the roller and the first link placed on the body of the roller receiver; Vehicle electrical equipment box. 2) The electrical equipment box for a vehicle according to claim 1, wherein the electrical equipment is a semiconductor device. 8) The electric device box for a vehicle according to claim 2, wherein a gate printing circuit for a semiconductor is housed in the second outer box.