CN113511291B

CN113511291B - Drainage structure of control device

Info

Publication number: CN113511291B
Application number: CN202010279558.3A
Authority: CN
Inventors: 蔡菊香; 张金璇; 川隅慎司
Original assignee: Honda Motor Co Ltd
Current assignee: Honda Motor Co Ltd
Priority date: 2020-04-10
Filing date: 2020-04-10
Publication date: 2022-10-14
Anticipated expiration: 2040-04-10
Also published as: CN113511291A; JPWO2021205914A1; JP7450021B2; WO2021205914A1

Abstract

The invention provides a drainage structure of a control device. Provided is a drainage structure for a control device, which can improve the drainage performance of water attached to the control device. A drain structure of a control device is applied to a control device (30) for controlling electric power supplied from a battery (B) to a motor (M), wherein the control device (30) has a main body part (32) for housing electronic components, and grooves (46, 46a, 47a, 48 a) reaching the side end parts of the main body part (32) are provided in the upper surface part (34) of the main body part (32). The bottom of the groove has an inclination that decreases from the center side toward the side end of the body (32). The groove is formed by a plurality of grooves having different directions. The groove is formed starting from a connection portion (40 a, 41a, 42 a) of a wiring (40, 41, 42) for supplying power to the motor (M).

Description

Drainage structure of control device

Technical Field

The present invention relates to a drain structure of a control device, and more particularly to a drain structure of a control device applied to a control device that controls electric power supplied to a motor.

Background

Conventionally, there is known a technique of providing a control device for controlling electric power supplied to a motor in an electric vehicle that obtains driving force by supplying electric power of an in-vehicle battery to the motor.

Patent document 1 discloses the following structure: the scooter type electric motorcycle has a low floor for placing a passenger's foot between a steering handle and a seat, and a control device is housed in a lower portion of the low floor.

Prior art documents

Patent document 1: international publication No. 2011/093279

Here, there are the following problems: to avoid the adhesion of water caused by rainwater, water splash, etc., and to easily restrict the arrangement position of a control device for controlling high-voltage power. In patent document 1, it is not considered to improve the degree of freedom of the arrangement position of the control device by improving the drainage performance when water adheres to the control device.

Disclosure of Invention

An object of the present invention is to solve the above-described problems of the prior art and to provide a drainage structure of a control device capable of improving drainage performance of water adhering to the control device.

In order to achieve the above object, a drain structure of a control device according to the present invention is applied to a control device (30) that controls electric power supplied from a battery (B) to a motor (M), and the control device (30) includes a main body portion (32) that houses electronic components, and grooves (46, 46a, 47a, 48 a) that reach side end portions of the main body portion (32) are provided in an upper surface portion (34) of the main body portion (32).

Further, the 2 nd feature is that the bottom of the groove (46, 46a, 47a, 48 a) has an inclination that descends from the center side toward the side end of the main body portion (32).

Further, the 3 rd feature is that the groove (46, 46a, 47a, 48 a) is constituted by a plurality of grooves having different directions from each other.

Further, according to the 4 th aspect, the grooves (46, 46a, 47a, 48 a) are formed starting from connection portions (40 a, 41a, 42 a) of wires (40, 41, 42) for supplying electric power to the motor (M).

Further, the 5 th feature is that the grooves (46, 46a, 47a, 48 a) are formed, the connecting portions (40 a, 41a, 42 a) adjacent to each other are not communicated with each other.

Further, the feature of item 6 is that the upper part of the grooves (46, 46a, 47a, 48 a) is covered with a cover member (31).

Further, according to the 7 th aspect, the control device (30) is mounted on a saddle-ride type electric vehicle (1).

Further, according to the 8 th aspect, at least a part of the groove (46, 46a, 47a, 48 a) is directed in the vehicle width direction of the saddle-type electric vehicle (1).

In addition, according to a 9 th aspect of the present invention, in a state in which a vehicle body of the saddle-type electric vehicle (1) is standing upright, the control device (30) is disposed in a posture in which an upper surface portion (34) of the main body portion (32) is inclined upward and forward, and at least a part of the grooves (46, 46a, 47a, 48 a) is directed downward and forward.

According to the first feature, the drain structure of the control device is applied to the control device (30) for controlling the electric power supplied from the battery (B) to the motor (M), wherein the control device (30) has a main body portion (32) for housing the electronic components, and grooves (46, 46a, 47a, 48 a) reaching the side end portions of the main body portion (32) are provided in the upper surface portion (34) of the main body portion (32), so that the water adhering to the main body portion can be discharged to the outside of the main body portion through the grooves. This improves the drainage performance of the control device, and increases the degree of freedom of the arrangement position of the control device.

According to the second aspect of the present invention, since the bottom of the groove (46, 46a, 47a, 48 a) has an inclination that decreases from the center side toward the side end of the main body (32), the water that has entered the groove can be efficiently discharged to the outside of the main body.

According to the 3 rd feature, since the grooves (46, 46a, 47a, 48 a) are formed by a plurality of grooves having different directions from each other, high drainage performance can be obtained regardless of the arrangement direction of the control device.

According to the 4 th aspect, since the grooves (46, 46a, 47a, 48 a) are formed starting from the connection portions (40 a, 41a, 42 a) of the wires (40, 41, 42) that supply electric power to the motor (M), it is possible to prevent water from accumulating around the connection terminals of the wires that supply electric power to the motor.

According to the 5 th feature, since the grooves (46, 46a, 47a, 48 a) are formed so that the connecting portions (40 a, 41a, 42 a) adjacent to each other do not communicate with each other, it is possible to prevent a situation in which the connecting portions are short-circuited with each other due to water entering into the grooves.

According to the feature of claim 6, since the upper side of the grooves (46, 46a, 47a, 48 a) is covered with the cover member (31), water is less likely to enter the upper surface portion of the control device.

According to the 7 th aspect, since the control device (30) is mounted on the saddle-type electric vehicle (1), the degree of freedom of mounting the control device on the saddle-type electric vehicle can be increased.

According to the 8 th aspect, at least a part of the grooves (46, 46a, 47a, 48 a) is directed in the vehicle width direction of the saddle-type electric vehicle (1), and therefore, when the saddle-type electric vehicle is parked using the side stand, water is easily discharged, and when the vehicle body is tilted and travels in a curve, water is easily discharged by a centrifugal force.

According to the 9 th aspect, in a state where the body of the saddle-type electric vehicle (1) is standing upright, the control device (30) is disposed in a posture in which the upper surface portion (34) of the main body portion (32) is inclined toward the front upper side, and at least a part of the grooves (46, 46a, 47a, 48 a) is directed toward the front lower side.

Drawings

Fig. 1 is a left side view of an electric motorcycle according to an embodiment of the present invention.

Fig. 2 is a block diagram showing the PCU and its peripheral structure.

Fig. 3 is a sectional view taken along line III-III of fig. 1.

Fig. 4 is a sectional view taken along line IV-IV of fig. 1.

Fig. 5 is a perspective view of the PCU.

Fig. 6 is a plan view of the PCU.

Fig. 7 is a rear view of the electric motorcycle in a state of parking with the side stand.

Description of the reference symbols

1: an electric two-wheeled vehicle; 30: PCU (control device); 31: a cover member; 32: a main body portion; 34: an upper surface portion; 40. 41, 42: wiring; 40a, 41a, 42a: a connecting portion; 46. 46a, 47a, 48a: a groove; b: a battery; m: in-wheel motor (motor).

Detailed Description

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Fig. 1 is a left side view of an electric motorcycle 1 according to an embodiment of the present invention. The electric motorcycle 1 is a scooter type saddle-ride type vehicle in which a low floor 12 for placing a passenger's foot is provided between a steering handle 3 and a seat 21. The frame F of the electric motorcycle 1 includes: a front stand pipe F1 that pivotally supports the steering rod 6 to be rotatable; a main frame F2 extending downward and rearward from the front stand pipe F1; a pair of left and right lower frames F3 bent at the lower end of the main frame F2 and extending rearward; and a pair of left and right rear frames F4 extending rearward and upward from the rear ends of the lower frames F3.

A steering handle 3 is attached to an upper portion of the steering rod 6, and a bottom axle 10 supporting a front fork 25 is fixed to a lower portion of the steering rod 6. The front wheel WF is rotatably supported by the lower end of the front fork 25.

A pivot 16 provided at the rear end of the lower frame F3 pivotally supports a swing arm 17 in a freely swingable manner, and the swing arm 17 pivotally supports the rear wheel WR in a freely rotatable manner. The upper end of the swing arm 17 is supported by the vehicle body by the rear cushion 14. The side bracket 15 is pivotally supported at a position below the rear cushion 14. In the present embodiment, an in-wheel motor (M) housed in a wheel of the rear wheel WR is used as a power source of the electric motorcycle 1.

A front cover 7 for supporting a headlight 9 is disposed in front of the front seat pipe F1, and a leg shield 8 facing the feet of the occupant is disposed behind the front seat pipe F1. The center of the steering handle 3 in the vehicle width direction is covered with a handle cover 5, and a pair of left and right rearview mirrors 2 are attached to the steering handle 3. A front fender 11 covering the upper part of the front wheel WF is fixed to the bottom axle 10, and a rear fender 18 covering the upper part of the rear wheel WR is fixed to the swing arm 17.

A rear cover 22 is disposed below the seat 21. A tail lamp device 19 is attached to a rear end of the rear cover 22. A battery B for supplying electric power to the in-wheel motor M is disposed below the lower floor panel 12. A PCU (power control unit) 30 as a control device that controls electric power supplied from the battery B to the in-wheel motor M is disposed across the left and right rear frames F4. A fuse box 20 is disposed above and behind the PCU30.

Fig. 2 is a block diagram showing PCU30 and its peripheral structure. The electric motorcycle 1 includes a PCU30, a main control unit 100, a battery B, an accelerator device 120, a brake device 130, a rotation speed sensor 101, and a motor (in-wheel motor) M as a control system for adjusting the driving force of the rear wheel WR. The accelerator device 120 includes an accelerator grip 121 and an accelerator detector 122. The brake device 130 includes a brake lever 131 and a brake detection unit 132. The rotation speed sensor 101 is built in the motor M.

Battery B includes a plurality of battery modules and a battery ECU. The plurality of battery modules of battery B are connected to motor M via PCU30. Battery ECU of battery B is connected to main control unit 100. Thereby, the amount of charge of the plurality of battery modules is supplied from the battery ECU to the main control portion 100.

The main control unit 100 is connected to an accelerator apparatus 120, a brake apparatus 130, and a rotation speed sensor 101. The main control unit 100 is composed of, for example, a CPU, a memory, or a microcomputer. When the accelerator grip 121 is operated by the driver, the accelerator detection unit 122 detects the operation amount of the accelerator grip 121 with reference to the non-operated state, and supplies the detected operation amount to the main control unit 100.

When the brake lever 131 is operated by the driver, the brake detector 132 detects the operation amount of the brake lever 131 with reference to the non-operated state, and supplies the detected operation amount to the main controller 100. The rotation speed sensor 101 detects the rotation speed of the motor M, and the detected rotation speed is supplied to the main control section 100.

As described above, the main control unit 100 is provided with information such as the amount of charge of the battery module, the operation amount of the accelerator grip 121, the operation amount of the brake lever 131, and the rotation speed of the motor M. Based on these pieces of information, main control unit 100 performs charge/discharge control of the battery module and power conversion control of PCU30. For example, at the time of vehicle start and acceleration by an accelerator operation, electric power of the battery module is supplied from battery B to PCU30. Further, main control unit 100 calculates a turning force to be transmitted to rear wheel WR as a command torque based on the supplied operation amount of accelerator grip 121, and supplies a control signal based on the command torque to PCU30.PCU30 controls the electric power supplied from battery B based on a control signal from main control unit 100, and converts the electric power into electric power necessary for driving rear wheels WR. Thereby, the drive power converted by PCU30 is supplied to motor M, and the rotational force of motor M based on the drive power is transmitted to rear wheel WR.

On the other hand, the motor M functions as a power generation device when the vehicle is decelerated by a brake operation. In this case, PCU30 converts the regenerative electric power generated by motor M into electric power suitable for charging the battery module, and supplies the electric power to the battery module. Thereby charging the battery module.

Fig. 3 is a sectional view taken along line III-III of fig. 1. Further, fig. 4 is a sectional view taken along line IV-IV of fig. 1. A storage box 23 is disposed below the seat 21 and inside the rear cover 22. The upper opening of the storage box 23 is covered by a floor 21a of the openable seat 21. PCU30 is fixed so as to straddle left and right rear frames F4, and the upper surface of PCU30 is substantially parallel to rear frame F4, and rear frame F4 is inclined rearward and upward as viewed from the vehicle body side.

Fig. 5 is a perspective view of PCU30.PCU30 has a main body portion 32, and a cover member 31 covering an upper surface portion 34 of main body portion 32. By attaching the cover member 31, water is less likely to adhere to the upper surface portion 34 of the main body portion 32 and the connection portion of each wiring. A stay 38 for attachment to the rear frame F4 is provided at the vehicle-widthwise left and right end portions of the main body portion 32.

At positions on the vehicle width direction right side of PCU30 and on both sides of upright portion 33, a negative electrode line 50 and a positive electrode line 51 of battery B are fastened by bolts 45, respectively. Around the upright portion 33, a 1 st connector 35, a 2 nd connector 36, and a 3 rd connector 37 for connecting a not-shown wire harness are provided.

Further, at a position on the left side of PCU30 in the vehicle width direction, U-phase line 40, V-phase line 41, and W-phase line 42 for supplying electric power to in-wheel motor M are fastened by bolts 45, respectively. The head of the bolt 45 to be fastened is set to be substantially the same as the height of the upper surface portion 34 (hatched portion in the drawing) of the main body portion 32.

Fig. 6 is a plan view of PCU30. In the figure, the U-phase line 40, the V-phase line 41, the W-phase line 42, the negative line 50, and the positive line 51 are shown in a state where they are removed. As described above, the upper surface portion 34 (hatched portion in the drawing) of the main body portion 32 is set to be substantially the same height as the height of the head of the bolt 45 connecting the U-phase line 40, the V-phase line 41, and the W-phase line 42. That is, the connecting

portions

40a, 41a, and 42a of the bolt 45 are lower than the upper surface portion 34 of the body portion 32 by one step.

In the drain structure of PCU30 according to the present embodiment, a plurality of

grooves

46, 46a, 47a, 48a for draining water are provided starting from connecting

portions

40a, 41a, 42a so that water does not accumulate at connecting

portions

40a, 41a, 42a that are one step lower than upper surface portion 34 of main body portion 32.

A groove 46 directed rearward and upward and two grooves 46a directed leftward in the vehicle width direction are provided around the connecting portion 40a of the U-phase line 40. The bottoms of the

grooves

46, 46a are each formed in a shape inclined so as to descend toward the side end portion of the body portion 32. Further, a groove 48 directed forward and downward and two grooves 48a directed to the left side in the vehicle width direction are provided around the connecting portion 42a of the W phase line 42. The bottom portions of the

grooves

48, 48a are each formed in a shape inclined so as to descend toward the side end portion of the body portion 32. Further, two grooves 47 directed to the right side in the vehicle width direction and two grooves 47a directed to the left side in the vehicle width direction are provided around the connecting portion 41a of the V-phase line 41. The bottoms of the

grooves

47, 47a are each formed in a shape inclined so as to descend toward the side end portion of the body portion 32. The lid member 31 has a lid upper surface portion 31a that covers the upper surface portion 34 of the body portion 32 from above, and a lid side surface portion 31b that covers from the side. A gap is formed between the side end of the body 32 and the cover side 31b, and water can pass through the gap.

According to the drainage structure of the control device of the present embodiment, since the

grooves

46, 46a, 47a, 48a reaching the side end portions of the body 32 are provided in the upper surface portion 34 of the body 32, water adhering to the body can be drained to the outside of the body through the grooves. This improves the drainage performance of PCU30, and increases the degree of freedom in the location where PCU30 is disposed.

Further, since the bottom of the groove has an inclination that decreases from the center side toward the side end of the body portion 32, the water that has entered the groove can be efficiently discharged to the outside of the body portion 32. Further, since the grooves are formed by a plurality of grooves having different directions, high drainage performance can be obtained regardless of the installation direction of PCU30. Further, since the grooves are formed starting from the

connection portions

40a, 41a, and 42a of the U-phase line 40, the V-phase line 41, and the W-phase line 42 that supply electric power to the motor M, water can be prevented from accumulating around the

connection portions

40a, 41a, and 42a of the wiring that supplies electric power to the motor M. Further, since the grooves are formed so that the connecting

portions

40a, 41a, 42a adjacent to each other do not communicate with each other, it is possible to prevent a situation in which the connecting portions are short-circuited with each other due to water entering the grooves.

Fig. 7 is a rear view of the electric motorcycle 1 in a parked state using the side stand 15. In the present embodiment, since the plurality of grooves are provided in the main body portion 32 of the PCU30, water can be satisfactorily drained even when the vehicle body is standing upright, and water is easily drained from the side of the

grooves

46a, 47a, 48a directed to the left side in the vehicle width direction when the vehicle is stopped using the side stand 15. Further, when the vehicle body is tilted and turned, water is easily discharged by centrifugal force. In addition, in the state where the vehicle body of the electric motorcycle 1 is standing upright, the PCU30 is disposed in a posture in which the upper surface portion 34 of the main body portion 32 is inclined toward the front upper side, and at least a part of the groove is directed toward the front lower side, whereby the drainage performance can be further improved.

The form of the electric motorcycle, the shape and structure of the PCU, the mounting structure of the PCU to the vehicle body, the shape and number of the grooves formed in the upper surface portion of the PCU, and the like are not limited to the above embodiments, and various modifications are possible. The drain structure of the control device of the present invention is applicable not only to electric motorcycles but also to PCUs used in various electric vehicles including saddle-type electric tricycles.

Claims

1. A drain structure of a control device, which is applied to a control device (30) for controlling electric power supplied from a battery (B) to a motor (M),

the control device (30) has a main body part (32) for accommodating electronic components,

grooves (46, 46a, 47a, 48 a) reaching the side end of the main body part (32) are provided in the upper surface part (34) of the main body part (32),

the grooves (46, 46a, 47a, 48 a) are formed starting from connection portions (40 a, 41a, 42 a) of wires (40, 41, 42) for supplying electric power to the motor (M),

the grooves (46, 46a, 47a, 48 a) are formed so that the connecting portions (40 a, 41a, 42 a) adjacent to each other do not communicate with each other.

2. The drain structure of the control device according to claim 1,

the bottom of the groove (46, 46a, 47a, 48 a) has an inclination that decreases from the center side toward the side end of the main body (32).

3. The drain structure of the control device according to claim 1 or 2,

the grooves (46, 46a, 47a, 48 a) are formed by a plurality of grooves having different directions.

4. The drain structure of the control device according to claim 1 or 2,

the upper part of the grooves (46, 46a, 47a, 48 a) is covered by a cover member (31).

5. The drain structure of the control device according to claim 1 or 2,

the control device (30) is mounted on a saddle-ride type electric vehicle (1).

6. The drain structure of the control device according to claim 4,

at least a part of the grooves (46, 46a, 47a, 48 a) is directed in the vehicle width direction of the saddle-type electric vehicle (1).

7. The drain structure of the control device according to claim 5,

the control device (30) is disposed in a posture in which an upper surface section (34) of the main body section (32) is inclined forward and upward in a state in which the body of the saddle-ride type electric vehicle (1) is standing upright, and at least a part of the grooves (46, 46a, 47a, 48 a) is directed forward and downward.