Vehicle

Abstract

The purpose of the present invention is to improve durability of an electric wire connecting units mounted on a vehicle. A vehicle is provided with: a first unit on which a rotating electric machine is mounted; a second unit on which an inverter is mounted; an electric wire electrically connecting the first unit and the second unit; and a wheel dynamically connected downstream of the first unit through the axle, the electric wire having a portion routed along the axle.

Description

Technical Field

[0001] The present invention relates to vehicles. Background Art

[0002] Patent Document 1 discloses a vehicle in which a vehicle body-side device and a wheel-side device are connected via in-vehicle wiring.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: International Publication No. 2021 / 166138 Summary of the invention

[0006] Technical problem to be solved by the invention

[0007] In the vehicle described in Patent Document 1, when the in-vehicle wiring is connected between the vehicle body side equipment and the wheel side equipment at the shortest distance, the in-vehicle wiring passes in the air. Since the vehicle body side equipment and the wheel side equipment shake with the shaking of the vehicle body, the in-vehicle wiring also shakes and expands, which may affect the durability of the in-vehicle wiring.

[0008] The present invention has been made in view of such a technical problem, and an object of the present invention is to improve the durability of electric wires that connect units mounted on a vehicle.

[0009] Technical solutions for solving technical problems

[0010] According to one embodiment of the present invention, a vehicle comprises: a first unit equipped with a rotating motor; a second unit equipped with an inverter; an electric wire electrically connecting the first unit and the second unit; a wheel dynamically connected to a downstream of the first unit via an axle; and the electric wire having a portion routed along the axle.

[0011] Effects of the Invention

[0012] According to this aspect, an object is to improve the durability of electric wires that connect units mounted on a vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a perspective view showing a portion of electric wires connecting a first unit and a second unit of a vehicle according to an embodiment of the present invention.

[0014] Figure 2 It is a plan view showing a portion of electric wires connecting a first unit and a second unit of a vehicle according to an embodiment of the present invention.

[0015] Figure 3 It is a side view showing the mounting position of the torque rod according to the embodiment of the present invention.

[0016] Figure 4 Is magnification Figure 2 Diagram of the wire section.

[0017] Figure 5 It is a diagram showing a modified example of the vehicle according to the embodiment of the present invention. DETAILED DESCRIPTION

[0018] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0019] The vehicle V of this embodiment is an electric vehicle using a motor as a driving source. Figure 1 to Figure 4 As shown, the vehicle V includes a vehicle 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.

[0020] like Figure 1 as well as Figure 2 As shown, the vehicle frame 1 includes a pair of longitudinal beams 1a extending at intervals in the longitudinal direction of the vehicle V, and a plurality of transverse beams 1b extending in the width direction of the vehicle V and connected to the pair of longitudinal beams 1a at both ends. The longitudinal beams 1a and the transverse beams 1b are formed of, for example, steel or aluminum.

[0021] The axle 2 includes a right axle 2a and a left axle 2b. Wheels 3 are mounted on the ends of the right axle 2a and the left axle 2b. The axle 2 connects the electric unit 5 and the wheels 3 located on the downstream side in the power transmission path to each other.

[0022] The axle 2 is suspended from the frame 1 via a plurality of stacked leaf springs 4. That is, the vehicle V has a rigid axle suspension structure. In addition, the axle 2 is connected to the cross beam 1b via a torque rod 7 which is a rod extending in a direction intersecting the axle 2. Both ends of the torque rod 7 are swingably supported by brackets respectively mounted on the axle 2 and the cross beam 1b.

[0023] The electric unit 5 is mounted on the axle 2. The electric unit 5 includes a rotary electric machine M and a differential gear (not shown) for distributing the output of the rotary electric machine M to the right axle 2a and the left axle 2b in a housing.

[0024] The rotating electric machine M functions as a driving source of the vehicle V. The rotating electric machine M is constituted by, for example, a three-phase AC permanent magnet synchronous motor. The rotating electric machine M is driven by electric power supplied from a battery (not shown) provided in the vehicle body via a control unit 6. The rotating power generated by the rotating electric machine M is transmitted to the wheels 3 via a differential gear (not shown), the right axle 2a, and the left axle 2b.

[0025] In addition, the electric unit 5 has a regenerative function for receiving the rotational power from the wheels 3 and generating electric power for charging the battery when the vehicle V is decelerating or braking.

[0026] An inverter device 6a having an inverter circuit and a converter circuit is mounted in the control unit 6. The control unit 6 is mounted on the lower part of the vehicle body, for example, near the cross member 1b, in the vehicle V. The electric unit 5 and the control unit 6 are electrically connected by in-vehicle wiring 8 (electric wires).

[0027] As described above, the vehicle V has a rigid axle suspension structure, so when the vehicle V travels on a bad road, for example, the axle 2 swings greatly. At this time, since the electric unit 5 is installed on the axle 2, the electric unit 5 also swings greatly. When the electric unit 5 swings greatly, the in-vehicle wiring 8 connecting the control unit 6 installed on the vehicle body and the electric unit 5 installed on the axle 2 swings greatly, and there is a possibility that the durability of the in-vehicle wiring 8 and the connector part of the in-vehicle wiring 8 will be reduced.

[0028] Therefore, in the vehicle V of the present embodiment, in order to prevent the in-vehicle wiring 8 from swinging greatly, the in-vehicle wiring 8 is routed along the axle 2, the torque rod 7, and the cross member 1b. Figure 4 And explain it in detail. It should be noted that Figure 4 Yes Figure 2 The wiring diagram in FIG. 1 is an enlarged view of a portion of the in-vehicle wiring 8 .

[0029] like Figure 4 As shown, the in-vehicle wiring 8 has a first wiring portion 8a wired along the right axle 2a, a second wiring portion 8c wired along the torque rod 7, a third wiring portion 8e wired along the cross beam 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.

[0030] The first wiring portion 8a and the first flexible portion 8b are electrically connected via a connection portion 9 mounted on 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 via connection portions 9 mounted on the torque rod 7, respectively. The second flexible portion 8d and the third wiring portion 8e are electrically connected via a connection portion 9 mounted on the cross member 1b. The connection portion 9 is a component that electrically connects adjacent wirings to each other and is composed of a connector, a terminal block, or the like.

[0031] The first flexible portion 8b is a portion that absorbs the tensile force and the compressive force acting on the connection portion of the first wiring portion 8a and the second wiring portion 8c when the axle 2 and the torque rod 7 are relatively displaced. The first flexible portion 8b is formed by bending the electric wire. Preferably, the first flexible portion 8b is formed in a manner that bends the electric wire in a direction away from the wheel 3. In this way, by bending the first flexible portion 8b in a direction away from the wheel 3, for example, when the first flexible portion 8b is bent, it is possible to prevent the first flexible portion 8b from contacting a rotating body that rotates together with the wheel 3, such as a brake (not shown).

[0032] The second flexure 8d is a portion that absorbs the tensile force and the compressive force acting on the connection portion of the second wiring portion 8c and the third wiring portion 8e when the torque rod 7 and the frame 1 (cross beam 1b) are relatively displaced. The second flexure 8d is formed by bending the electric wire. Preferably, the second flexure 8d is formed in a manner that bends the electric wire in a direction away from the wheel 3. In this way, by bending the second flexure 8d in a direction away from the wheel 3, for example, when the second flexure 8d is bent, it is possible to prevent the second flexure 8d from contacting a rotating body that rotates together with the wheel 3, such as a brake (not shown).

[0033] Thus, in the vehicle V of this embodiment, the in-vehicle wiring 8 is routed along the axle 2, the torque rod 7 and the cross beam 1b, and supported by the connecting portion 9 attached to the axle 2, the torque rod 7 and the cross beam 1b. Thus, when the vehicle V vibrates greatly, the in-vehicle wiring 8 can be prevented from swinging greatly.

[0034] It should be noted that in the above-mentioned embodiment, the case where the in-vehicle wiring 8 is routed along the axle 2, the torque rod 7 and the cross beam 1b by using the connecting portion 9 installed on the axle 2, the torque rod 7 and the cross beam 1b is described as an example, but it is not limited to this. For example, the in-vehicle wiring 8 can also be fixed to the outer peripheral surface of the axle 2, the torque rod 7 and the cross beam 1b by other fixing mechanisms such as a binding band. In this case, the electric unit 5 and the control unit 6 can also be connected using a single in-vehicle wiring 8, and the connecting portion 9 can also be provided. It should be noted that in this case, the tensile force or compressive force caused by the relative displacement between the axle 2, the torque rod 7 and the cross beam 1b can also be absorbed by providing a portion equivalent to the first flexure 8b and the second flexure 8d.

[0035] In addition, in the above-mentioned embodiment, the case where the in-vehicle wiring 8 is routed along the torque rod 7 is used as an example for explanation, but as long as it is a component connecting the axle 2 and the frame 1 (for example, a cross rod, an upper ring, a lower link), the in-vehicle wiring 8 can be routed along the component or through the inside of the component.

[0036] Furthermore, the in-vehicle wiring 8 may be routed so that the in-vehicle wiring 8 passes through the inside of the axle 2 and the torque rod 7. In this case, the wires may also be routed inside the axle 2 and the torque rod 7, such as Figure 5 As shown, a busbar B may be arranged inside the torque rod 7 instead of the electric wire. When the busbar B is arranged, the busbar can be prevented from shaking inside the torque rod 7 by filling the inside of the torque rod 7 with resin R. Furthermore, the insulation between the busbars B or between the busbar B and the torque rod 7 can be ensured by the resin R. It should be noted that the same structure can also be adopted for the wiring of the in-vehicle wiring 8 in the axle 2.

[0037] Furthermore, in the above-described embodiment, the suspension structure using the leaf spring 4 is described as an example, but the present invention is also applicable to a suspension structure using a coil spring and a shock absorber.

[0038] The structure, operation, and effects of the embodiment of the present invention configured as described above will be summarized and described.

[0039] (1) The vehicle V comprises: 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); in-vehicle wiring 8 (electric wires) electrically connecting the electric unit 5 (first unit) and the control unit 6 (second unit); a wheel 3 dynamically connected to the downstream of the electric unit 5 (first unit) via an axle 2, and the in-vehicle wiring 8 (electric wires) having a portion (first wiring portion 8a) routed along the axle 2.

[0040] In this structure, the in-vehicle wiring 8 (electric wire) is not extended straight from the electric unit 5 (first unit) toward the control unit 6 (second unit), but is arranged in a roundabout manner so as to extend from the electric unit 5 (first unit) toward the wheel 3. In this case, since the in-vehicle wiring 8 (electric wire) is routed along the axle 2, the shaking of the in-vehicle wiring 8 (electric wire) can be suppressed. As a result, the durability of the in-vehicle wiring 8 (electric wire) connecting the electric unit 5 (first unit) and the control unit 6 (second unit) can be improved.

[0041] It should be noted that, when the in-vehicle wiring 8 (electric wire) is routed along the outer surface of the axle 2, the bending can be reduced by installing the connecting portion 9 on the axle 2. On the other hand, when the in-vehicle wiring 8 (electric wire) is located on the inner side of the axle 2, the influence of the shaking of the in-vehicle wiring 8 (electric wire) can be further reduced.

[0042] (2) The vehicle V includes the torque rod 7 (rod) extending in the direction intersecting the axle 2, and the in-vehicle wiring 8 (electrical wire) includes a portion (second wiring portion 8c) routed along the torque rod 7 (rod).

[0043] In this structure, since the in-vehicle wiring 8 (electrical wire) is routed along the torque rod 7 (rod), the shaking of the in-vehicle wiring 8 (electrical wire) can be suppressed. It should be noted that, when the in-vehicle wiring 8 (electrical wire) is routed along the outer surface of the torque rod 7 (rod), the bending can be reduced by installing the connecting portion 9 on the torque rod 7 (rod). On the other hand, when the in-vehicle wiring 8 (electrical wire) is located on the inner side of the torque rod 7 (rod), the influence of the shaking of the in-vehicle wiring 8 (electrical wire) can be further reduced.

[0044] (3) In the vehicle V, the in-vehicle wiring 8 (electric wire) has a portion passing through the inside of the torque rod 7 (rod).

[0045] In this structure, the influence of the shaking of the in-vehicle wiring 8 (electric wires) can be further reduced.

[0046] (4) In the vehicle V, the in-vehicle wiring 8 (electric wire) has a flexible portion (first flexible portion 8b) that is flexible between a portion (first wiring portion 8a) that is wired along the axle 2 and a portion (second wiring portion 8c) that is wired along the torque rod 7 (rod).

[0047] In this structure, since the portion of the in-vehicle wiring 8 (electric wire) connecting the axle 2 and the torque rod 7 (rod) is partially bent, the bent portion can be minimized, and the axle 2 extending in the intersecting direction can be smoothly connected to the torque rod 7 (rod) by the bending. In addition, the tensile force or compressive force caused by the relative displacement between the axle 2 and the torque rod 7 can be suppressed from acting on the in-vehicle wiring 8 (electric wire).

[0048] (5) In the vehicle V, the flexible portion (the first flexible portion 8 b ) is flexible in a direction away from the wheel 3 .

[0049] As mentioned above, although the embodiment of the present invention is described, the above embodiment is only an application example of the present invention, and it is not intended that the technical scope of the present invention is limited to the specific structure of the above embodiment.

[0050] Description of Reference Numerals

[0051] 1: vehicle frame; 1a: longitudinal beam; 1b: transverse beam; 2: axle; 3: wheel; 5: electric unit (first unit); 6: control unit (second unit); 6a: inverter device (inverter); 7: torque rod (rod); 8: in-vehicle wiring (wire); 8a: first wiring portion; 8b: first flexible portion; 8c: second wiring portion; 8d: second flexible portion; 8e: third wiring portion; 9: connecting portion; M: rotating motor.

Claims

1. A vehicle, characterized in that: have: A first unit equipped with a rotating electric machine; a second unit, which is equipped with an inverter; an electric wire electrically connecting the first unit and the second unit; a wheel dynamically connected downstream of the first unit via an axle; The electric wire has a portion routed along the axle.

2. The vehicle according to claim 1, characterized in that The vehicle has a rod extending in a direction intersecting the axle, The electric wire has a portion routed along the rod.

3. The vehicle according to claim 2, characterized in that The electric wire has a portion passing through the inside of the rod.

4. The vehicle according to claim 2 or 3, characterized in that: The electric wire has a flex portion that flexes between a portion routed along the axle and a portion routed along the rod.

5. The vehicle according to claim 4, characterized in that The flexure portion flexes in a direction away from the wheel.

Images