vehicle

Abstract

[Problem] To improve the durability of an electric cable that connects units mounted in a vehicle to one another. [Solution] This vehicle includes a first unit equipped with a rotary electrical machine, a second unit equipped with an inverter, an electric cable electrically connecting the first unit and the second unit, and a wheel that is dynamically connected downstream of the first unit by means of an axle, wherein the electric cable includes a part that is routed along the axle.

Description

[Technical Field]

[0001] The present invention relates to a vehicle. [Background technology]

[0002] Patent Document 1 discloses a vehicle in which body-side devices and wheel-side devices are connected by a wire harness. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2021 / 166138 Summary of the Invention [Problem to be solved by the invention]

[0004] In the vehicle described in Patent Document 1, if the wire harness between the vehicle body side device and the wheel side device is connected over the shortest distance, it will pass through the air. When the vehicle body side device and the wheel side device sway with the sway of the vehicle body, the wire harness also sways and expands and contracts, which may affect the durability of the wire harness.

[0005] The present invention has been made in view of the above technical problems, and has an object to improve the durability of electric wires that connect units mounted on a vehicle. [Means for solving the problem]

[0006] According to one aspect of the present invention, a vehicle includes a first unit equipped with a rotating electric machine, a second unit equipped with an inverter, electric wires electrically connecting the first unit and the second unit, and wheels power-connected via axles downstream of the first unit; a rod extending in a direction intersecting the axle; and the electric wire has It is supported by the axle, and the electric wire is The part that runs along the axle and a flexible portion bent between the portion arranged along the axle and the portion arranged along the rod, the flexible portion being bent in a direction away from the adjacent wheel. . [Effects of the Invention]

[0007] According to this aspect, it is an object to improve the durability of the electric wires connecting the units mounted on the vehicle. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view showing an electric wire portion connecting a first unit and a second unit of a vehicle according to an embodiment of the present invention. [Figure 2] FIG. 2 is a top view showing an electric wire portion connecting a first unit and a second unit of a vehicle according to an embodiment of the present invention. [Figure 3] FIG. 3 is a side view showing the attachment position of the torque rod according to the embodiment of the present invention. [Figure 4] FIG. 4 is an enlarged view of the electric wire portion in FIG. [Figure 5] FIG. 5 is a diagram showing a modified example of the vehicle according to the embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

[0010] The vehicle V of this embodiment is an electric vehicle using a motor as a drive source. As shown in Figures 1 to 4, the vehicle V includes a frame 1, an axle 2, wheels 3, a plurality of leaf springs 4, an electric unit 5 as a first unit, and a control unit 6 as a second unit.

[0011] 1 and 2, the frame 1 includes a pair of side members 1a extending at a distance in the longitudinal direction of the vehicle V, and a plurality of cross members 1b extending in the width direction of the vehicle V and connected at both ends to the pair of side members 1a. The side members 1a and the cross members 1b are formed from, for example, steel or aluminum.

[0012] The axles 2 include a right axle 2a and a left axle 2b. Wheels 3 are attached to the ends of the right axle 2a and the left axle 2b, respectively. The axles 2 power-connect the electric unit 5 to the wheels 3 located downstream in the power transmission path.

[0013] The axle 2 is suspended from the frame 1 via a plurality of stacked leaf springs 4. In other words, the vehicle V has a rigid axle suspension structure. The axle 2 is connected to the cross member 1b via a torque rod 7, which serves as a rod extending in a direction intersecting the axle 2. Both ends of the torque rod 7 are supported so as to be able to swing freely by brackets attached to the axle 2 and the cross member 1b, respectively.

[0014] The electric unit 5 is mounted on the axle 2. The electric unit 5 has, in a case, a rotating electric machine M and a differential gear (not shown) that distributes the output of the rotating electric machine M to the right axle 2a and the left axle 2b.

[0015] The rotating electric machine M functions as a drive source for the vehicle V. The rotating electric machine M is configured, for example, by a three-phase AC permanent magnet synchronous motor. The rotating electric machine M is driven by power supplied from a battery (not shown) provided in the vehicle body via a control unit 6. Rotational power from the rotating electric machine M is transmitted to the wheels 3 via a differential gear (not shown), a right axle 2a, and a left axle 2b.

[0016] Furthermore, the electric unit 5 has a regenerative function that receives rotational power from the wheels 3 and generates electric power to charge the battery when the vehicle V is decelerating or braking.

[0017] An inverter device 6a having an inverter circuit and a converter circuit is mounted inside the control unit 6. In the vehicle V, the control unit 6 is attached to the lower part of the vehicle body, for example, near the cross member 1b. The electric unit 5 and the control unit 6 are electrically connected by a wire harness 8 (electric wire).

[0018] As described above, since the vehicle V has a rigid axle suspension structure, when the vehicle V travels on a rough road or the like, the axle 2 swings significantly. At this time, the electric unit 5 is mounted on the axle 2, so the electric unit 5 also swings significantly. When the electric unit 5 swings significantly, the wire harness 8 that connects the control unit 6 mounted on the vehicle body and the electric unit 5 mounted on the axle 2 swings significantly, which may reduce the durability of the wire harness 8 and the connector portion of the wire harness 8.

[0019] Therefore, in the vehicle V of this embodiment, the wire harness 8 is routed along the axle 2, the torque rod 7, and the cross member 1b to prevent the wire harness 8 from swinging significantly. A method for routing the wire harness 8 will be specifically described below with reference to Fig. 4. Fig. 4 is an enlarged view of the portion in Fig. 2 where the wire harness 8 is routed.

[0020] As shown in FIG. 4, the wire harness 8 has a first wiring portion 8a routed along the right axle 2a, a second wiring portion 8c routed along the torque rod 7, a third wiring portion 8e routed along the cross member 1b, a first flexible portion 8b connecting the first wiring portion 8a and the second wiring portion 8c, and a second flexible portion 8d connecting the second wiring portion 8c and the third wiring portion 8e.

[0021] The first wiring portion 8a and the first flexible portion 8b are electrically connected by a connection portion 9 attached to the right axle 2a. The first flexible portion 8b and the second wiring portion 8c, and the second wiring portion 8c and the second flexible portion 8d are electrically connected by connection portions 9 attached to the torque rod 7. The second flexible portion 8d and the third wiring portion 8e are electrically connected by a connection portion 9 attached to the cross member 1b. The connection portion 9 is a member that electrically connects adjacent wiring portions to each other, and is formed by a connector, a terminal block, or the like.

[0022] The first flexible portion 8b is a portion that absorbs tensile and compressive forces acting on the connection portion between the first wiring portion 8a and the second wiring portion 8c when the axle 2 and the torque rod 7 are displaced relative to each other. The first flexible portion 8b is formed by bending the electric wire. Preferably, the first flexible portion 8b is formed so as to bend the electric wire in a direction away from the wheel 3. By forming the first flexible portion 8b to bend in a direction away from the wheel 3 in this way, for example, when the first flexible portion 8b is bent, it is possible to prevent the first flexible portion 8b from coming into contact with a rotating body that rotates together with the wheel 3, such as the wheel 3 or a brake (not shown).

[0023] The second flexible portion 8d is a portion that absorbs tensile and compressive forces acting on the connection portion between the second wiring portion 8c and the third wiring portion 8e when the torque rod 7 and the frame 1 (cross member 1b) are displaced relative to each other. The second flexible portion 8d is formed by bending the electric wire. Preferably, the second flexible portion 8d is formed so as to bend the electric wire in a direction away from the wheel 3. By forming the second flexible portion 8d to bend in a direction away from the wheel 3 in this way, for example, when the second flexible portion 8d is bent, it is possible to prevent the second flexible portion 8d from coming into contact with a rotating body that rotates together with the wheel 3, such as the wheel 3 or a brake (not shown).

[0024] As described above, in the vehicle V of this embodiment, the wire harness 8 is routed along the axle 2, the torque rod 7, and the cross member 1b, and is supported by the connection parts 9 attached to the axle 2, the torque rod 7, and the cross member 1b. This prevents the wire harness 8 from swinging significantly when the vehicle V vibrates significantly.

[0025] In the above embodiment, the wire harness 8 is routed along the axle 2, torque rod 7, and cross member 1b using the connection portion 9 attached to the axle 2, torque rod 7, and cross member 1b. However, the present invention is not limited to this. For example, the wire harness 8 may be fixed to the outer circumferential surfaces of the axle 2, torque rod 7, and cross member 1b by other fixing means such as cable ties. In this case, the electric unit 5 and the control unit 6 may be connected by a single wire harness 8, or a connection portion 9 may be provided. In this case, too, by providing portions corresponding to the first flexible portion 8b and the second flexible portion 8d, tensile forces and compressive forces resulting from relative displacement between the axle 2, torque rod 7, and cross member 1b can be absorbed.

[0026] In addition, in the above embodiment, an example was described in which the wire harness 8 was routed along the torque rod 7, but if it is a component that connects the axle 2 and the frame 1 (for example, a lateral rod, an upper ring, or a lower link), the wire harness 8 may be routed along that component or pass through the inside of that component.

[0027] Furthermore, the wire harness 8 may be routed so as to pass through the inside of the axle 2 or the torque rod 7. In this case, electric wires may be routed inside the axle 2 or the torque rod 7, or as shown in FIG. 5, a bus bar B may be routed inside the torque rod 7 instead of electric wires. When routing the bus bar B, filling the inside of the torque rod 7 with resin R can prevent the bus bar B from rattling inside the torque rod 7. Furthermore, the resin R can ensure insulation between the bus bars B or between the bus bar B and the torque rod 7. A similar structure can also be adopted for routing the wire harness 8 on the axle 2.

[0028] Furthermore, in the above embodiment, the suspension structure using the leaf spring 4 has been described as an example, but the present invention can also be applied to a suspension structure using a coil spring and a shock absorber.

[0029] The configuration, operation, and effects of the embodiment of the present invention configured as above will be described below.

[0030] (1) The vehicle V has an electric unit 5 (first unit) equipped with a rotating electric machine M, a control unit 6 (second unit) equipped with an inverter device 6a (inverter), a wire harness 8 (electric wire) electrically connecting the electric unit 5 (first unit) and the control unit 6 (second unit), and wheels 3 that are power-connected downstream of the electric unit 5 (first unit) via axles 2, and the wire harness 8 (electric wire) has a portion (first wiring portion 8a) that is routed along the axles 2.

[0031] In this configuration, the wire harness 8 (electrical wires) is not extended in a straight line from the electric unit 5 (first unit) to the control unit 6 (second unit), but is instead provided in a detour so as to extend from the electric unit 5 (first unit) toward the wheels 3. In this case, the wire harness 8 (electrical wires) is routed along the axle 2, which can reduce vibration of the wire harness 8 (electrical wires). This can improve the durability of the wire harness 8 (electrical wires) connecting the electric unit 5 (first unit) and the control unit 6 (second unit).

[0032] When the wire harness 8 (electric wires) is routed along the outer surface of the axle 2, the deflection can be reduced by attaching the connection part 9 to the axle 2. On the other hand, when the wire harness 8 (electric wires) is located inside the axle 2, the influence of the swinging of the wire harness 8 (electric wires) can be further reduced.

[0033] (2) The vehicle V has a torque rod 7 (rod) extending in a direction intersecting the axle 2, and the wire harness 8 (electric wire) has a portion (second wiring portion 8c) that is routed along the torque rod 7 (rod).

[0034] In this configuration, the wire harness 8 (electrical wires) is routed along the torque rod 7 (rod), which makes it possible to suppress swinging of the wire harness 8 (electrical wires). When the wire harness 8 (electrical wires) is routed along the outer surface of the torque rod 7 (rod), deflection can be reduced by attaching a connection portion 9 to the torque rod 7 (rod). On the other hand, when the wire harness 8 (electrical wires) is located inside the torque rod 7 (rod), the influence of swinging of the wire harness 8 (electrical wires) can be further reduced.

[0035] (3) In the vehicle V, the wire harness 8 (electric wires) has a portion that passes through the torque rod 7 (rod).

[0036] In this configuration, the influence of the swinging of the wire harness 8 (electric wires) can be further reduced.

[0037] (4) In the vehicle V, the wire harness 8 (electric wire) has a bent portion (first bent portion 8b) between a portion (first wiring portion 8a) routed along the axle 2 and a portion (second wiring portion 8c) routed along the torque rod 7 (rod).

[0038] In this configuration, the portion of the wire harness 8 (electric wire) connecting the axle 2 and the torque rod 7 (rod) is locally bent, which minimizes the bent portion and allows for smooth connection from the axle 2, which extends in the intersecting direction, to the torque rod 7 (rod). In addition, it is possible to prevent tensile and compressive forces caused by relative displacement between the axle 2 and the torque rod 7 from acting on the wire harness 8 (electric wire).

[0039] (5) In the vehicle V, the bent portion (first bent portion 8b) is bent in a direction away from the wheel 3.

[0040] Although the embodiments of the present invention have been described above, the above embodiments are merely application examples of the present invention, and the technical scope of the present invention is not intended to be limited to the specific configurations of the above embodiments. [Explanation of symbols]

[0041] 1 frame 1a Side member 1b Cross member 2 axles 3 wheels 5 Electric unit (first unit) 6 Control unit (second unit) 6a Inverter device (inverter) 7 Torque rod (rod) 8 Harness (electrical wire) 8a 1st wiring section 8b First flexible portion 8c 2nd wiring section 8d Second flexure 8e 3rd wiring section 9 Connection M Rotating Electric Machine

Claims

1. a first unit equipped with a rotating electric machine; a second unit equipped with an inverter; an electric wire electrically connecting the first unit and the second unit; a wheel powerably connected to the downstream side of the first unit via an axle; a rod extending in a direction intersecting the axle; and The electric wire is supported by the axle, the electric wire has a portion routed along the axle, a portion routed along the rod, and a bent portion bent between the portion routed along the axle and the portion routed along the rod, The flexible portion is flexible in a direction away from the adjacent wheel. vehicle.

2. 2. The vehicle according to claim 1, The electric wire has a portion passing through the rod.

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