JP2000092623A - Power line holding structure in electric vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To protect a power line with which the battery box and the motor of an electric vehicle are connected to each other from damage at the time of collision while the random movement of the middle part of the power line is avoided. SOLUTION: A holder 46 is fixed to the middle part of a power line 43 with which a battery box and a motor are connected to each other. The retaining nail 57 of the holder 46 is retained by the retaining hole 455 of a stay 45 which is fixed aslant to a body so as to have its front side upward, and hence the power line 43 is held aslant so as to have its front side upward. If the motor is made to rush backward or the battery box is made to rush forward by the impact of collision of a car, and loads F1 and F2 in the forward and backward directions of the body are applied to the power line 43, the holder 46 is turned in the direction of an arrow M with the front edge P of a flange part 56 which is pressed against the supporting surface 454 of the stay 45 as the fulcrum of the turn. As a result, the retaining nail 57 is pulled out of the retaining hole 455 and the holder 46 is separated from the stay 45, so that the power line 43 is released from the constraint at its middle part and protected from damage.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric vehicle in which a battery box containing a battery and a traveling motor are connected by a power line, and more particularly to a power line holding structure.

[0002]

2. Description of the Related Art In such an electric vehicle, if an intermediate portion of a power line connecting a battery box and a motor can be freely moved, the intermediate portion of the power line comes into contact with a vehicle body due to vibration and inertia during traveling. The end of the power line connected to the coupler or the terminal may be damaged due to tension applied thereto. Therefore, conventionally, the intermediate portion of the power line is held at an appropriate position on the vehicle body so as to prevent delusion during traveling, thereby avoiding the damage.

[0003]

However, when an electric vehicle collides, the motor may retreat due to the impact of the collision or the battery box may move forward due to the inertia of the collision. If the power line is firmly fixed, the power line connected to the motor and the battery box at both ends may be damaged by a strong force acting on the power line.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and reliably prevents damage to a power line at the time of a collision, while preventing a middle part of a power line connecting a battery box and a motor of an electric vehicle from being deflected. The purpose is to:

[0005]

In order to achieve the above object, according to the present invention, an intermediate portion of a power line for connecting a battery box containing a battery and a traveling motor is connected to a holder via a holder. A holding structure for holding a power line in an electric vehicle, wherein a locking claw of a holder fixed to a power line is separably engaged with a locking hole provided on a support surface of the vehicle body so as to be held on the vehicle body. The surface is arranged such that the power line held therethrough via the holder is inclined with respect to the vehicle longitudinal direction, and when a load in the vehicle longitudinal direction applied to the power line is transmitted from the power line to the holder, the holder is The separation of the locking claw from the locking hole is promoted by the locking release means provided in the above.

[0006] According to the above configuration, normally, the middle part of the power line connecting the battery box and the motor is held on the supporting surface of the vehicle body via the holder, so that the middle part of the power line is prevented from being deflected. Can be. Also, when the battery box moves forward due to the impact of the vehicle collision, or the motor retreats and a load in the vehicle longitudinal direction acts on the power line, the holder attached to the support surface is moved by the load in the vehicle longitudinal direction transmitted from the power line. Try to rotate. At this time, the separation of the locking claw from the locking hole is promoted by the locking release means provided on the holder, so that the holder can be reliably separated from the support surface of the vehicle body and the middle part of the power line can move freely. And damage to the power line can be avoided.

According to a second aspect of the present invention, in addition to the configuration of the first aspect, the unlocking means provided on the holder engages with a clamp portion fixed to a power line and a locking hole. It is a flange portion provided between the stop pawl and abutting on the support surface.

[0008] According to the above construction, the means for releasing the lock of the holder is provided from the flange portion provided between the clamp portion fixed to the power line and the locking claw engaging with the locking hole and abutting on the support surface. When the holder is rotated by the load transmitted from the power line, the edge of the flange portion serves as a fulcrum, and the locking claw is positively moved in a direction to be pulled out from the locking hole, and the holder is moved to the supporting surface of the vehicle body. Can be reliably separated from

According to a third aspect of the present invention, in addition to the configuration of the first aspect, the locking claw of the holder has a first tapered surface provided on a front side in a direction of insertion into the locking hole. And a second tapered surface provided on the rear side in the insertion direction.

According to the above configuration, the locking claw of the holder is
Since the first tapered surface provided on the front side in the insertion direction is provided, the operation of inserting the locking claw into the locking hole can be easily performed. Further, since the locking claw of the holder has the second tapered surface provided on the rear side in the insertion direction, when a load is applied to the holder from the power line due to a collision of the vehicle, the locking claw is moved from the locking hole. It can be pulled out reliably.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described based on embodiments of the present invention shown in the accompanying drawings.

1 to 10 show an embodiment of the present invention. FIG. 1 is an overall side view of an electric vehicle, FIG. 2 is an overall perspective view of an electric vehicle, and FIG. 3 is a state in which a battery box is removed. 1 is an overall perspective view of the electric vehicle, FIG. 4 is a block diagram of a drive system and a control system of the electric vehicle, and FIG.
6 is a sectional view taken along line 6-6 in FIG. 5, FIG. 7 is an enlarged view of a main part in FIG. 5, FIG. 8 is a view in the direction of arrow 8 in FIG. 7, and FIG. FIG. 10 is an operation explanatory view corresponding to FIG. 9.

As shown in FIGS. 1 to 3, an electric vehicle V having left and right front wheels W _FL , W _FR and left and right rear wheels W _RL , W _RR has a pair of left and right side frames 1 extending in the vehicle longitudinal direction. _L, comprising 1 and _R, the vehicle body frame 4 composed of a front cross member 2 and the rear cross member 3 which connects the side frames 1 _L, 1 _R extends in the lateral direction of the vehicle body. A reduction gear 6 and a differential device 7 are integrally provided in a motor 5 which is a traveling drive source mounted between the front ends of the left and right side frames 1 _L and 1 _R. The extended drive shafts 8 _L and 8 _R are connected to the left and right front wheels W _FL and W _FR , respectively.

A shallow tray-shaped battery box 9 having an open upper surface is detachably supported on the lower surface of the vehicle body frame 4. Twenty-four batteries for supplying power to the motor 5 are provided in the rear half of the battery box 9. 10 are mounted in two rows, and a motor 5 and a battery 1
.., A control unit 11 for controlling various accessories and the like, and a PDU 12 (power drive unit) composed of an inverter for controlling driving and regeneration of the motor 5 in accordance with a command from the control unit 11.

Next, a schematic configuration of a drive system and a control system of the electric vehicle V will be described with reference to FIG. In FIG. 4, a thick solid line represents a high-voltage / high-current line, an intermediate solid line represents a high-voltage / medium-low current line, and a thin solid line represents a low-voltage / high-current line.
The dashed line with the arrow indicates the low current line and the signal line indicates the signal line.

The control unit 11 includes a contactor box 21, a junction board 22, and a managing ECU 23 (managing electronic control unit).
And a motor ECU 24 (motor electronic control unit);
An on-board charger 25, a downverter 26, and an air conditioner inverter 27 are provided.

The batteries 10... Mounted in the battery box 9 are composed of Ni-MH batteries, and 24 of them are connected in series to give a total voltage of 288 volts. A contactor box 21, a junction board 22, and a PDU 12 are connected in series between the battery box 9 and the motor 5.

A contactor box 21 connected to the batteries 10 has a main contactor 28 which opens and closes in conjunction with an ignition switch, and a main contactor 28 for preventing the main contactor 28 from being damaged by an inrush current when the main contactor 28 is closed. A precharge contactor 29 and a precharge resistor 29a are provided. The junction board 22 includes a contactor box 21 and a PD.
It has a function to distribute power to the on-board charger 25, the downverter 26, and the air conditioner inverter 27 from between U12. The on-board charger 25 is a battery 10 ...
And a plug 30 connected to an external commercial power supply. The downverter 26 is an electric vehicle V
Is used to charge the auxiliary battery 31 of 12 volts for driving the various auxiliary devices. The air conditioner inverter 27 converts the DC current of the batteries 10 into AC current and converts the DC current into a compressor 32 of the air conditioner.
Drive.

The managing ECU 23 controls opening and closing of the main contactor 28, supplies power to the on-board charger 25, the downverter 26, and the inverter 27 for the air conditioner, outputs a remaining capacity signal of the batteries 10, and outputs an alarm signal. Govern Further, the motor ECU 24 controls the driving force and the regenerative braking force generated by the motor 5 by controlling the PDU 12 based on the brake signal, the selector position, the accelerator opening, and the motor speed.

As shown in FIGS. 5 and 6, and the coupler housing recess 9 ₁ right front portion of the battery box 9 is formed, it is fixed to the battery box 9 side three female coupler 41 ... detachably to 3 male couplers 4 to be combined
2 ... are disposed in the coupler housing recess 9 _1. The three power lines 43 (a part of the three-phase alternating-current high-voltage / high-current lines shown by thick solid lines in FIG. 4) connected to the male couplers 42 pass under the front cross member 2 and
Are provided inside the motor 5 from the grommets 44. An intermediate portion of the three power lines 43 is detachably held by a stay 45 fixed to the lower surface of the front cross member 2 via a holder 46.

In FIG. 5, three harnesses 48 extending from the inside of the battery box 9 via grommets 47 are part of signal lines shown by broken lines with arrows in FIG. A harness 49 extending to the driver's seat is detachably connected via a coupler 50.

As is apparent from FIG.
The stay 45 is a member of the cross groove type, is one of the brackets 45 ₁ protruding rear side is fixed to the rear lower face of the front cross member 2 by bolts 51, two brackets 45 projecting to the front side _2, 45 ₃ bolt 52, 53
At the front of the front cross member 2.

Next, the structure of the holder 46 will be described with reference to FIGS. The three holders 46 have the same structure and are interchangeable.

The holder 46 is a member integrally molded by synthetic resin, an arcuate clamp portion 54, one end via a thin hinge 54 ₁ to the pivoted arcuate movable clamp portion 54 A clamp portion 55 and a rectangular plate-like flange portion 56 integrally connected to the upper surface of the fixed clamp portion 54
And the locking claw 5 integrally projecting from the upper surface of the flange portion 56
7 is provided. The flange portion 56 constitutes the unlocking means of the present invention.

As shown by a dashed line in FIG. 8, the power line 43 is fitted inside the fixed clamp portion 54 with the movable clamp portion 55 opened to the fixed clamp portion 54, and the movable clamp portion 55 is hinged to the hinge 54 _1. is rotated in the arrow direction of FIG. 8 around, locking projection 54 ₂ provided on the fixed clamping portion 54
Locking holes 55 ₁ are engaged provided on the movable clamp portion 55,
Power line 4 between fixed clamp 54 and movable clamp 55
3 is firmly fixed.

The vehicle is arranged so as to rise forward with respect to the longitudinal direction of the vehicle body.
Support surface 45 of the stay 45_FourSquare lock formed on
Hole 45_FiveClaw 5 of holder 46 inserted from below into
7 is a pair of guide surfaces 57 on both left and right sides thereof.₁, 57₁To
And a pair of retaining projections 5 on both front and rear surfaces thereof.
7_Two, 57_TwoIs provided. Each retaining projection 57 _Two
Is provided on the front side of the locking claw 57 in the insertion direction and
A pair of first tapered surfaces 57 that taper toward_Three,
57_ThreeIs provided on the rear side in the insertion direction of the locking claw 57 and is inserted.
Pair of second tapered surfaces 5 tapering rearward in the direction
7_Four, 57_FourAnd

[0027] the locking pawl 57 of the holder 46, the locking hole 4 of the stay 45 while guided by the guide surface 57 _1, 57 ₁
When inserted into the 5 _5, the locking hole 45 to ₅ edge first tapered surface 57 _3, 57 ₃ has been retaining projection 57 ₂ compresses,
57 ₂ by overcoming the edges of the engaging stop hole 45 ₅ is elastically deformed, the holder 46 is attached to the stay 45. In this state, the flange portion 56 of the holder 46 comes into close contact with the supporting surface 45 ₄ of the stay 45.

When the motor 5 moves rearward due to the impact of the collision of the electric vehicle V, the power line 43 ahead of the holder 46 is pushed by the motor 5 and moves rearward. When the battery box 9 moves forward due to the inertia of the collision of the electric vehicle V, the power line 43 behind the holder 46 is pushed by the battery box 9 and moves forward. At this time, the power line 4 is placed before and after the holder 46.
Since 3 is disposed inclined forwardly upward, 9, a load F ₁ of the vehicle body rearward transmitted in the first half of the power line 43 from the motor 5 is transmitted from the battery box 9 in the second half of the power line 43 by the vehicle body forward of the load F ₂ that can generate the moment M in the clockwise direction effectively to the holder 46.

When the clockwise moment M acts on the holder 46 as described above, the holder 46 rotates clockwise about the front edge P of the flange 56 as shown in FIG. To the retaining hole 4 of the stay 45
Load F ₃ of the direction is generated to pull draw from 5 _5. As a result, the load F ₃ is the locking claw 57 for holder 46 is withdrawn from the locking hole 45 ₅ is separated from the stay 45, an intermediate portion of the power line 43 is released to be bound by the holder 46 is free to move As a result, the damage is avoided. Also, when the load F ₃ claw 57 of the holder 46 is applied, retaining projection 57 _{and second} locking claws 57, 57 ₂
The holder 46 can be smoothly separated from the stay 45 by the action of the second tapered surfaces 57 ₄ and 57 ₄ .

Although the embodiments of the present invention have been described in detail, various design changes can be made in the present invention without departing from the gist thereof.

For example, in the embodiment, the power lines 43 supported by the holders 46 are inclined forward and upward with respect to the longitudinal direction of the vehicle body, but the direction of the inclination is arbitrary. In the embodiment, the power lines 43 are held by the front cross member 2, but they can be held by any other part of the vehicle body.

[0032]

As described above, according to the first aspect of the present invention, normally, the intermediate portion of the power line connecting the battery box and the motor is held on the support surface of the vehicle body via the holder. In this way, the middle part of the power line can be prevented from being perturbed. Also, when the battery box moves forward due to the impact of the vehicle collision, or the motor retreats and a load in the vehicle longitudinal direction acts on the power line, the holder attached to the support surface is moved by the load in the vehicle longitudinal direction transmitted from the power line. Try to rotate. At this time, the separation of the locking claw from the locking hole is promoted by the locking release means provided on the holder, so that the holder can be reliably separated from the support surface of the vehicle body and the middle part of the power line can move freely. And damage to the power line can be avoided.

According to the second aspect of the present invention,
The lock release means of the holder is constituted by a flange portion provided between the clamp portion fixed to the power line and the locking claw engaging with the locking hole and abutting against the support surface, so that the power is transmitted from the power line. When the holder is rotated by the load, the edge of the flange portion serves as a fulcrum, and the locking claw can be positively moved in the pulling-out direction from the locking hole to reliably separate the holder from the support surface of the vehicle body.

According to the third aspect of the present invention,
Since the locking claw of the holder is provided with the first tapered surface provided on the front side in the insertion direction, the operation of inserting the locking claw into the locking hole can be easily performed. Further, since the locking claw of the holder has the second tapered surface provided on the rear side in the insertion direction, when a load is applied to the holder from the power line due to a collision of the vehicle, the locking claw is moved from the locking hole. It can be pulled out reliably.

[Brief description of the drawings]

FIG. 1 is an overall side view of an electric vehicle.

FIG. 2 is an overall perspective view of an electric vehicle.

FIG. 3 is an overall perspective view of the electric vehicle with a battery box removed.

FIG. 4 is a block diagram of a drive system and a control system of the electric vehicle.

FIG. 5 is an enlarged sectional view taken along line 5-5 of FIG. 1;

FIG. 6 is a sectional view taken along line 6-6 in FIG. 5;

FIG. 7 is an enlarged view of a main part of FIG. 5;

FIG. 8 is a view in the direction of arrows in FIG. 7;

9 is a view in the direction of arrow 9 in FIG. 8;

FIG. 10 is an operation explanatory view corresponding to FIG. 9;

[Explanation of symbols]

5 Motor 9 Battery Box 10 Battery 43 Power Line 45 ₄ Support Surface 45 ₅ Lock Hole 46 Holder 54 Fixed Clamp (Clamp) 55 Movable Clamp (Clamp) 56 Flange (Lock Release Means) 57 Locking Claw 57 ₃ 1st taper section 57 ₄ 2nd taper section

Claims (3)

[Claims] An intermediate portion of a power line (43) connecting a battery box (9) containing a battery (10) and a traveling motor (5) to a vehicle body via a holder (46). Holder (4) fixed to power line (43)
The locking claw (57) 6) A holding structure of the body of the support surface (45 ₄₎ provided with locking holes (45 ₅₎ to detachably power line for an electric vehicle comprising engaged, vehicle The support surface (45 ₄ ) is arranged such that the power line (43) held therethrough via the holder (46) is inclined with respect to the vehicle longitudinal direction, and the power line (43) acts on the power line (43). Load (F ₁ ,
When F ₂ ) is transmitted from the power line (43) to the holder (46), the lock release means (56) provided on the holder (46) releases the locking claw (57) from the locking hole (45 ₅ ). A holding structure for a power line in an electric vehicle, wherein separation of the power line is promoted. 2. An unlocking means (56) provided on the holder (46) engages with a clamp portion (54, 55) fixed to the power line (43) and a locking hole (45 ₅ ). The holding structure for a power line in an electric vehicle according to claim 1, characterized in that it is a flange portion provided between the pawl (57) and the abutment surface (45 ₄ ). 3. A locking claw (57) of said holder (46).
A first tapered surface (57 ₃ ) provided on the front side in the inserting direction into the locking hole (45 ₅ ) and a second tapered surface (57 ₄ ) provided on the rear side in the inserting direction. The holding structure for a power line in an electric vehicle according to claim 1, further comprising: