Straddle-type vehicle

Abstract

A straddle-type vehicle capable of inhibiting the case where water is internally immersed from between an opening of a controller main body and an opening of a motor main body. A motor case (51A) is formed with a motor case opening (51a) that communicates an inside of the motor case (51A) with an outside, an inverter case (53A) is formed with an inverter case opening (53b) that communicates an inside of the inverter case (53A) with an outside, an inverter (53) and a motor (51) are electrically connected to each other via the motor case opening (51a) and the inverter case opening (53b), and an engaging surface (50a) at which the motor case opening (51a) and the inverter case opening (53b) engage with each other becomes substantially vertical with respect to a horizontal plane in a state where a power unit (50) is mounted on a vehicle (1).

Description

Technical Field

[0001] This invention relates to a straddle-type vehicle. Background Technology

[0002] In recent years, efforts toward achieving a low-carbon or decarbonized society have become more active, and research and development related to electrification technologies have been carried out in vehicles to reduce CO2 emissions and improve energy efficiency.

[0003] Previously, in straddle-type electric vehicles, there was a known structure in which the controller body, which houses the inverter and other controllers, is integrated with the motor body, which houses the motor. The three-phase wires connecting the controller and the motor are arranged inside an opening formed in the upper part of the motor body and an opening formed in the lower part of the controller body. The openings of the controller body and the motor body are joined by a gasket.

[0004] Prior art literature

[0005] Patent documents

[0006] Patent Document 1: Chinese Utility Model Registration No. 208015543 Summary of the Invention

[0007] Summary of the invention

[0008] The problem that the invention aims to solve

[0009] However, in electric motorized motorcycles where the electromechanical motor is easily exposed, there is a problem that water can easily seep in from between the openings of the controller body and the motor body due to factors such as washing or rain. This is especially true when the joint between the openings of the motor body and the controller body is horizontal relative to the ground, causing water to accumulate around the openings and thus easily seep in from between them.

[0010] Therefore, the present invention provides a straddle-type vehicle capable of preventing water from seeping into the interior from between the opening of the controller body and the opening of the motor body.

[0011] Solution for solving the problem

[0012] To address the aforementioned issues, the present invention employs the following structure.

[0013] (1) The straddle-type vehicle of embodiment 1 of the present invention includes: a motor 51 for driving a vehicle 1; an inverter 53 for controlling the motor 51; a motor housing 51A for housing the motor 51; an inverter housing 53A for housing the inverter 53; and a power unit 50 integrating the motor housing 51A and the inverter housing 53A. The straddle-type vehicle is characterized in that the motor housing 51A has a motor housing opening 51a that communicates the interior and exterior of the motor housing 51A, and the inverter housing 53A has an inverter housing opening 53b that communicates the interior and exterior of the inverter housing 53A. The inverter 53 and the motor 51 are electrically connected to each other via the motor housing opening 51a and the inverter housing opening 53b. When the power unit 50 is mounted on the vehicle 1, the mating surface 50a where the motor housing opening 51a and the inverter housing opening 53b engage is substantially vertical relative to the horizontal plane.

[0014] According to the present invention, in a straddle-type vehicle, in an electromechanical unit where the inverter and motor are separable, the inverter and motor are coupled, and the coupling surface through which the wiring connecting the two passes is substantially vertical when mounted on the vehicle. Therefore, water adhering to the periphery of the substantially vertically arranged coupling surface between the inverter housing opening and the motor housing opening can flow rapidly downwards, and water can be prevented from seeping into the interior of the motor housing and inverter housing from the coupling surface.

[0015] (2) Based on the straddle-type vehicle of Scheme 1, Scheme 2 of the present invention may also have the motor housing 51A having a side opening 51B that opens along the width direction of the vehicle 1 and exposes the rotating shaft 51b and wiring 543 of the motor 51. The side opening 51B is formed by the periphery of a protrusion 511 that protrudes outward from the motor housing 51A in the width direction. When viewed from the side of the vehicle 1, the upper protrusion 51c of the protrusion 511, which is located above the rotating shaft 51b, is inclined downward toward the rear of the vehicle 1.

[0016] According to this structure, water adhering to the upper protrusion can flow in the direction of separation from the opening of the motor housing located on the front side (rear), thus preventing water from seeping into the power unit from the joint surface.

[0017] (3) Based on the straddle-type vehicle of Scheme 2, Scheme 3 of the present invention may also be characterized in that the lower protrusion 51e of the protrusion 511, which is located below the rotating shaft 51b, is inclined downward toward the rear of the vehicle 1.

[0018] According to this structure, water adhering to the lower protrusion can flow in the direction of separation from the motor housing opening located on the front side (rear), thus suppressing the situation where water adheres to the connecting member located inside the motor housing opening and the inverter housing opening.

[0019] (4) Based on the straddle-type vehicle of Scheme 2, Scheme 4 of the present invention is characterized in that the inverter 53 and the motor 51 are connected by an inverter-side wiring 542 connected to the inverter 53 and a motor-side wiring 543 connected to the motor 51. When viewed in the vehicle width direction, the connection part 54 connecting the inverter-side wiring 542 and the motor-side wiring 543 is exposed to the inside of the side opening 51B.

[0020] According to this structure, the inverter-side wiring can be connected to the motor-side wiring by accessing from the opening of the side opening to the inside of the side opening, thus improving the connection operability.

[0021] (5) Based on the straddle-type vehicle of Scheme 4, Scheme 5 of the present invention may also include the inverter-side wiring 542 including a terminal block 545 extending from the inverter housing 53A, and the motor-side wiring 543 having flexibility.

[0022] This structure allows for easy deformation of the flexible motor-side wiring. Therefore, it facilitates easy connection of the motor-side wiring to the terminal block, improving the workability of connecting the inverter-side wiring to the motor-side wiring.

[0023] (6) Based on the straddle-type vehicle of Scheme 5, Scheme 6 of the present invention may also be characterized in that, when viewed in the vehicle width direction, the terminal plate 545 overlaps with the stator 56 of the motor 51.

[0024] According to this structure, when viewed in the vehicle width direction, even when the terminal block and stator are close together and the area for connecting the inverter-side wiring and the motor-side wiring becomes narrower, it is still easy to connect the motor-side wiring and the inverter-side wiring.

[0025] (7) Based on the straddle-type vehicle of Scheme 5, Scheme 7 of the present invention may also be that, when viewed in the vehicle width direction, the radial side 50b of the motor housing 51A pointing to the motor 51 overlaps with the terminal plate 545.

[0026] According to this structure, when viewed in the vehicle width direction, even when the terminal block and stator are close together and the area for connecting the inverter-side wiring and the motor-side wiring becomes narrower, it is still easy to connect the motor-side wiring and the inverter-side wiring.

[0027] (8) Based on the straddle-type vehicle of Scheme 2, Scheme 8 of the present invention may also be characterized in that, when viewed in the vehicle width direction, an angle sensor 57 for detecting the rotation angle of the motor 51 is disposed inside the side opening 51B, and the sensor line 546 for conducting the signal of the angle sensor 57 passes through the inside of the motor housing opening 51a and the inverter housing opening 53b.

[0028] According to this structure, the sensor wires, together with the wiring that connects the inverter and the motor using openings in the motor housing and inverter housing, can be routed from the inverter housing side to the motor housing side. Therefore, there is no need to provide a separate opening for the sensor wires, simplifying the sensor wire routing structure.

[0029] Invention Effects

[0030] The straddle-type vehicle of the present invention can prevent water from seeping into the interior through the opening between the opening of the controller body and the opening of the motor body. Attached Figure Description

[0031] Figure 1 This is a right-side view of the motorized two-wheeled vehicle in an embodiment of the present invention.

[0032] Figure 2 yes Figure 1 The side view of the power unit shown.

[0033] Figure 3 Is Figure 2 The diagram shows a three-dimensional view of the motor housing with the housing cover installed.

[0034] Figure 4 It is a three-dimensional diagram showing the structure of the inverter housing.

[0035] Figure 5 yes Figure 2 The longitudinal sectional view of the power unit shown.

[0036] Figure 6 yes Figure 2 Enlarged view of the main parts of the connection section of the power unit shown.

[0037] Symbol explanation:

[0038] 1. Motorized two-wheeled vehicle (horseback riding type)

[0039] 10 Frame

[0040] 20 Front frame

[0041] 30 Battery casing

[0042] 40 Rear Frame

[0043] 50 power units

[0044] 50a mating surface

[0045] 50b side view

[0046] 51 motor

[0047] 51A Motor Housing

[0048] 51B Side opening

[0049] 51a Motor housing opening

[0050] 51b Rotating Shaft

[0051] 51c Upper protrusion

[0052] 51d Circular protrusion

[0053] 51e Lower protrusion

[0054] 511 Protrusion

[0055] 52 Reducer

[0056] 53 Inverter

[0057] 53A Inverter Housing

[0058] 53a Inverter housing opening

[0059] 54 Connecting parts

[0060] 541 Connecting Components

[0061] 542 Inverter-side wiring

[0062] 543 Motor-side wiring

[0063] 545 terminal block

[0064] 546 Sensor Line

[0065] 56 stators

[0066] 57 Angle Sensor Detailed Implementation

[0067] The embodiments of this disclosure will now be described with reference to the accompanying drawings. It should be noted that in the embodiments described below, common parts are labeled with the same reference numerals.

[0068] Furthermore, in the following description, unless otherwise specified, "front and back," "up and down," and "left and right" refer to the front and back, up and down, and left and right of a vehicle facing the direction of travel. The accompanying drawings show arrows indicating the top of the vehicle (UP), the front of the vehicle (FR), and the left side of the vehicle (LH) in appropriate locations.

[0069] <Vehicle as a whole>

[0070] Figure 1 This is a left-side view of the motorized two-wheeled vehicle 1 according to this embodiment.

[0071] like Figure 1 As shown, the motorized two-wheeled vehicle 1 of this embodiment is an electric straddle-type vehicle. The motorized two-wheeled vehicle 1 includes a frame 10, a front wheel 11, a rear wheel 12, a swing arm 13, a body cover 14, a seat 15, and a rear buffer 16.

[0072] The front wheel 11 is supported on the lower end of a pair of left and right front forks 21. The upper part of the front fork 21 is supported on the front end of the frame 10 in a steerable manner via a steering rod 23. A handlebar 17 for steering is mounted on the upper part of the steering rod 23.

[0073] The motorized two-wheeled vehicle 1 includes: a battery housing 30 configured to house a battery 31; a front frame 20 connected to the front of the battery housing 30 and having a steering system; a rear frame 40 connected to the rear of the battery housing and supporting the rear wheel 12 so as to be able to swing about a pivot 43; and a power unit 50 that outputs driving force to the rear wheel 12 via electricity from the battery 31. The front frame 20 and the rear frame 40 are separated in the longitudinal direction, sandwiching the battery housing 30.

[0074] The frame 10 includes a head tube (not shown), a front frame 20, and a rear frame 40.

[0075] The head tube is positioned at the front end of the front frame 20 within the frame 10. The head tube supports the steering system components, including the front wheel 11, enabling steering. The steering rod 23 passes through the head tube.

[0076] The front frame 20 extends rearward from the head tube. The front frame 20 is connected to the upper front part of the battery housing 30. The front frame 20 includes: a pair of upper frames 242 extending rearward from the front frame 241 and connected to the side (upper surface) of the battery; and a pair of lower frames 243 extending rearward and downward from below the upper frames 242 and connected to the front surface of the battery. The upper frames 242 are connected to approximately the center of the upper surface of the battery. The lower frames 243 are connected to both ends of the front surface of the battery housing across the vehicle width. The fastening connection positions and methods can be appropriately changed by adjusting the vehicle body rigidity within the front frame 20.

[0077] The rear frame 40 is positioned further rearward than the front frame 20. The rear frame 40 is separate from the front frame 20. The rear frame 40 has a pair of vertical portions 41 extending vertically to the left and right behind the power unit 50, and a pair of horizontal portions 42 extending horizontally to the left and right below the power unit 50, forming a roughly L-shaped form when viewed from the side. The rear frame 40 is constructed separately to accommodate the power unit 50 and the battery housing 30 by clamping them into place from the outside of the vehicle width.

[0078] The battery housing 30 houses the battery 31 that supplies power to the motor 51. The battery housing 30 is positioned forward of the rear frame 40. The battery housing 30 is connected to the front frame 20.

[0079] The battery housing 30 is made of aluminum or aluminum alloy. The battery housing 30 is generally rectangular in shape, extending front-to-back, top-to-bottom, and left-to-right. When viewed from the side, the battery housing 30 is larger in the top-to-bottom direction than in the front-to-back direction. The battery housing 30 is disposed between the front frame 20 and the rear frame 40.

[0080] A recess 32 is formed on the battery housing 30, which, when viewed from the side, extends approximately horizontally forward from the middle of the rear surface of the battery housing in a vertical direction and extends approximately vertically upward from the middle of the lower surface of the battery housing in a front-rear direction, and is thus cut off. The front portion of the power unit 50 is disposed in the recess 32. That is, when viewed from the side, the battery housing 30 is approximately L-shaped, recessed from the lower rear of the vehicle body towards the front of the vehicle body, and the power unit 50 is disposed in the recess 32 that forms this recessed portion. Between the recess 32 and the L-shaped rear frame 40, a region that is approximately rectangular in shape when viewed from the side is formed, and the power unit 50 is disposed in this region.

[0081] The swing arm 13 is located below the rear of the vehicle body. The swing arm 13 extends longitudinally. The front end of the swing arm 13 is supported on the rear frame 40 of the frame 10 by means of vertical swing. Specifically, the swing arm 13 is supported on the lower rear part of the rear frame 40 by means of pivot 43.

[0082] The rear wheel 12 is rotatably supported on the rear end of the swing arm 13. The rear wheel 12 is connected to the motor 51 via a transmission mechanism (not shown) formed by a ring-shaped member disposed on the left side of the rear of the vehicle body. In this embodiment, the ring-shaped member is a belt-type transmission mechanism using a drive belt.

[0083] The rear buffer 16 is located at the center of the rear width of the vehicle body. The rear buffer 16 integrally incorporates a buffer and damper with a compression coil spring. The rear buffer 16 is sandwiched between the rear frame 40 and the swing arm 13. Specifically, the upper end of the rear buffer 16 is connected to the rear frame 40. In addition, the lower end of the rear buffer 16 is connected to the front of the swing arm 13.

[0084] The seat 15 is positioned above the power unit 50 and the rear frame 40, and behind the upper part of the battery casing 30. The seat 15 is supported from below by a seat frame 27 supported on the rear frame 40. The front end of the seat frame 27 is fixed to the upper rear part of the rear frame 40, and the seat frame 27 extends rearward from this fixed part. The seat 15 is positioned to cover the upper part of the seat frame 27.

[0085] A pair of seat frames 27 are provided on the left and right sides. The pair of seat frames 27 are fastened to the upper rear end of the battery housing 30 and the upper end of the rear frame 40. The pair of seat frames 27 are arranged spaced apart from each other in the vehicle width direction, extending rearward and upward from the rear end of the rear frame 40. The rear ends of the pair of seat frames 27 are connected to each other through the rear frame 40.

[0086] <Power Unit>

[0087] The power unit 50 houses the motor 51, which has a stator 56 and a rotor and is driven by power from a battery. The power unit 50 is positioned rearward of the front frame 20 and rearward of the battery housing 30. The power unit 50 is connected to the rear frame 40.

[0088] Figure 2 yes Figure 1 The side view of the power unit 50 shown. Figure 3 Is Figure 2 The diagram shows a perspective view of the motor housing 51A with the housing cover 512 installed. Figure 4 This is a three-dimensional view showing the structure of the inverter housing 53A. Figure 5 yes Figure 2 The longitudinal sectional view of the power unit 50 shown. Figure 6 yes Figure 2 Enlarged view of the main part of the connection portion 54 of the power unit 50 shown.

[0089] like Figure 2 and Figure 3 As shown, the motor drive, or PDU (Power Drive Unit), housed in the power unit 50 constitutes the inverter 53. This PDU is controlled by a control device such as an ECU (Electric Control Unit) that controls the PDU.

[0090] like Figure 1 As shown, the power unit 50 is formed of aluminum or an aluminum alloy. The upper end of the power unit 50 is positioned below the upper end of the battery housing 30. Thus, the power unit 50 is configured in a state sandwiched between the rear frame 40 and the battery housing 30. That is, the power unit 50 is positioned inside the closed area formed at least in a side view by the outer surface of the battery housing 30 in the vehicle width direction and the outer edge of the rear frame 40.

[0091] like Figure 2 and Figure 5 As shown, the power unit 50 includes a motor 51 that drives the motorized two-wheeled vehicle 1, an inverter 53 that controls the motor 51, a motor housing 51A that houses the motor 51, and an inverter housing 53A that houses the inverter 53. The power unit 50 connects the motor housing 51A and the inverter housing 53A (see reference). Figure 4 The motor 51 is integrated into the power unit 50. The output of the motor 51 is transmitted to a reducer (not shown) that is separately installed from the power unit 50. The motor 51 is located at the lower rear of the unit, with the motor shaft (rotation shaft 51b) oriented in the vehicle width direction.

[0092] The reducer is positioned adjacent to the right side of the motor 51, with its output shaft facing the vehicle width direction. The reducer outputs power to the rear wheel 12 via a drive pulley. The output shaft of the power unit 50 is located forward of the pivot 43. The inverter 53 is positioned at the front of the unit.

[0093] like Figure 1 As shown, the power unit 50 is supported only on the vertical portion 41 of the rear frame 40 in a state separate from the battery housing 30. Most of the power unit 50 is disposed in the space surrounded by the recess 32, the vertical portion 41 and the horizontal portion 42 of the battery housing 30 when viewed from the side.

[0094] like Figure 2 , Figure 3 and Figure 5 As shown, the motor housing 51A has a motor housing opening 51a that communicates the interior and exterior of the motor housing 51A. The motor housing opening 51a is located on the front side of the motor housing 51A. Around the motor housing opening 51a, there is a motor housing side mating surface 51t (corresponding to the mating surface 50a described later) in the vertical direction. A gasket 55 with a shape consistent with the groove 51f of the motor housing side mating surface 51t is fitted. The surface direction of the motor housing side mating surface 51t is a direction orthogonal to the horizontal plane when viewed from the vehicle width direction, and it is opposite to the inverter housing side mating surface 53t described later.

[0095] The motor housing 51A includes: a bottomed cylindrical housing body 510 having a housing portion for the motor 51; and a housing cover 512 covering an opening on the top side of the housing body 510. The housing body 510 and the housing cover 512 are configured to be detachable and removable along the vehicle width direction.

[0096] The cover 512 of the motor housing 51A has a side opening 51B that opens in the vehicle width direction and exposes the rotating shaft 51b of the motor 51 and the wiring 543. The side opening 51B is formed by the periphery of a protrusion 511 that projects outward from the motor housing 51A in the vehicle width direction. The protrusion 511 has a circular protrusion 51d, an upper protrusion 51c, and a lower protrusion 51e. The circular protrusion 51d has a front opening and is coaxially arranged with the rotating shaft 51b when viewed from the direction of the rotating shaft of the motor 51, forming a generally circular shape. In a side view, the upper protrusion 51c is located above the rotating shaft 51b in the protrusion 511, and slopes downward and rearward. The lower protrusion 51e is located below the rotating shaft 51b in the protrusion 511, and slopes downward and rearward. Figure 3 As shown, the side opening 51B is covered by a cover 51C from the outside in the vehicle width direction. Figure 2 As shown, a cooling water outlet 513 is provided on the motor housing 51A.

[0097] like Figure 4 and Figure 5 As shown, the inverter housing 53A has an inverter housing opening 53b that connects the interior of the inverter housing 53A to the outside. The inverter housing opening 53b is located on the rear side of the inverter housing 53A. Around the inverter housing opening 53b, there is an inverter housing side mating surface 53t (corresponding to the mating surface 50a described later) along the vertical direction. The surface direction of the inverter housing side mating surface 53t is a direction orthogonal to the horizontal plane when viewed from the vehicle width direction, and it is opposite to the motor housing side mating surface 51t described above. The inverter housing 53A is formed in a generally plate-like shape with a housing portion for the inverter 53.

[0098] illustrate Figure 4 The inverter housing 53A is shown in various locations. An inverter mounting hole 532 is located on the upper part of the rearward-facing surface. The inverter mounting hole 532 is a hole for housing the low-voltage signal line connector of the PDU (inverter 53) (a signal that turns the switching elements of the inverter 53 on / off). Various locations on the inverter housing 53A are provided for connection to the motor housing 51A (see reference 51A). Figure 3 ) Fastening bolts 531 for connection and multiple bolt holes 533 for fastening connection.

[0099] A pair of high-voltage connectors 535 are disposed on the upper part of the rearward-facing surface of the inverter housing 53A. The high-voltage connectors 535 are connected to the battery via a wiring harness. Of the pair of high-voltage connectors 535, one is the positive terminal connector and the other is the negative terminal connector. A cover 534 is provided adjacent to the pair of high-voltage connectors 535. The cover 534 exposes the connection and fastening portion of the positive and negative high-voltage lines within the PDU to the connectors 535.

[0100] A cooling water inlet 536 for injecting cooling water is provided at the center of the rearward-facing surface of the inverter housing 53A. A cooling water outlet 537 is provided below the cooling water inlet 536. The cooling water outlet 537 is a flow path for cooling water to flow from the inverter housing 53A to the motor housing 51A. Here, the inverter 53 and motor 51 are water-cooled, and the cooling water circulates in the order of radiator, inverter 53, motor 51, and radiator.

[0101] like Figure 5 As shown, the motor housing opening 51a and the inverter housing opening 53b are joined in a liquid-tight state by sandwiching a gasket 55. The power unit 50 joins the motor housing side joint surface 51t, which forms a vertical plane, and the inverter housing side joint surface 53t, which forms a vertical plane, by abutting in a direction orthogonal to their respective vertical planes.

[0102] In the power unit 50, the inverter 53 and the motor 51 are electrically connected to each other via the motor housing opening 51a and the inverter housing opening 53b. When the power unit 50 is mounted on the motorized two-wheeled vehicle 1, the mating surface 50a where the motor housing opening 51a and the inverter housing opening 53b meet is approximately vertical relative to the horizontal plane. Here, the horizontal plane is the line connecting the mounting points of the front wheel 11 and the rear wheel 12. Figure 1 The dotted line shown represents a roughly vertical range of 90 degrees ± 5 degrees relative to the horizontal plane.

[0103] From a side view, the mating surface 50a is located on the line connecting the front axle and the rear axle. Figure 1 (As shown by the dashed line). When the mating surface 50a is located above the line, the battery capacity decreases. When the mating surface 50a is located below the line, it is difficult to ensure the minimum ground clearance. Therefore, the mating surface 50a is configured to be located on the line, thereby ensuring both battery capacity and minimum ground clearance.

[0104] like Figure 5 and Figure 6As shown, the power unit 50 has a connection portion 54 that electrically connects the inverter 53 and the motor 51. The connection portion 54 has a connection member 541, an inverter-side wiring 542, and a motor-side wiring 543. The connection member 541 connects the inverter-side wiring 542 connected to the inverter 53 and the motor-side wiring 543 connected to the motor 51. The inverter-side wiring 542 and the motor-side wiring 543 are both three-phase wires. These three-phase wires are wired through the inside of the motor housing opening 51a formed in the motor 51 and the inverter housing opening 53b formed in the inverter 53. That is, when viewed in the vehicle width direction, the inverter-side wiring 542 and the motor-side wiring 543 are connected via the connection member 541 to the side opening 51B (see reference). Figure 2 The inner side of the inverter side wiring 541 is exposed. The connecting member 541 is, for example, a bolt or other fastening connection. The inverter-side wiring 542 includes a terminal block 545 extending from the inverter housing 53A. The motor-side wiring 543 is flexible.

[0105] Terminal plate 545 has walls that shield the three-phase lines extending from inside inverter housing 53A from each other. These walls prevent the three-phase lines from coming into contact with each other. Terminal plate 545 is constructed of non-conductive materials. For example, it may be made of resin. In a side view, the upper part of terminal plate 545 has a sensor line support portion 548 that supports the sensor line 546 (described later). The sensor line support portion 548 clamps and fixes the sensor line 546 around its perimeter.

[0106] like Figure 2 As shown, when viewed in the vehicle width direction, the terminal plate 545 overlaps with the stator 56 of the motor 51. Furthermore, when viewed in the vehicle width direction, the radial side 50b of the motor housing 51A pointing towards the motor 51 overlaps with the terminal plate 545.

[0107] Viewed in the vehicle width direction, an angle sensor 57, consisting of a resolver, is positioned inside the side opening 51B to detect the rotation angle of the motor 51. A sensor line 546, which conducts the signal from the angle sensor 57, passes through the inside of the motor housing opening 51a and the inverter housing opening 53b. The sensor line 546 includes a motor-side sensor line 546A connected at one end to the resolver and an inverter-side sensor line 546B connected at one end to a component inside the inverter. The motor-side sensor line 546A and the inverter-side sensor line 546B are connected inside the side opening 51B via a connector 547.

[0108] The following describes the assembly sequence for the power unit 50. First, assemble the inverter 53 and the motor 51 separately. At this time, as follows... Figure 4As shown, the inverter 53 is assembled with the terminal block 545, inverter-side wiring 542, and sensor wire 546 extending outwards from the inverter housing opening 53b. Next, the inverter 53 is integrated with the motor 51 using multiple fastening bolts 531. At this time, the terminal block 545, inverter-side wiring 542, and sensor wire 546 are passed through the motor-side opening of the motor 51. Next, as... Figure 6 As shown, the motor-side wiring 543 is connected to the inverter-side wiring 542, and the inverter-side sensor line 546B is connected to the motor-side sensor line 546A, through the side opening 51B of the motor 51. The inverter-side wiring 542 and sensor line 546 are assembled on the motor side as an integral part of the terminal block 545, thus improving the wiring efficiency of the three-phase lines and sensor line 546 when the inverter 53 and motor 51 are integrated.

[0109] As explained above, the motorized two-wheeled vehicle 1 in the above embodiment is a straddle-type vehicle, which includes a motor 51 that drives the vehicle 1, an inverter 53 that controls the motor 51, a motor housing 51A that houses the motor 51, an inverter housing 53A that houses the inverter 53, and a power unit 50 that integrates the motor housing 51A and the inverter housing 53A. The motor housing 51A has a motor housing opening 51a that connects the inside of the motor housing 51A to the outside, and the inverter housing 53A has an inverter housing opening 53b that connects the inside of the inverter housing 53A to the outside. The inverter 53 and the motor 51 are electrically connected to each other through the motor housing opening 51a and the inverter housing opening 53b. When the power unit 50 is mounted on the vehicle 1, the mating surface 50a where the motor housing opening 51a and the inverter housing opening 53b meet is approximately vertical relative to the horizontal plane.

[0110] According to the motorized two-wheeled vehicle 1 of this embodiment, in the electromechanical integrated unit (power unit 50) where the inverter 53 and motor 51 can be separated, the inverter 53 and motor 51 are connected, and the joint surface 50a through which the wiring connecting the two passes is substantially vertical when mounted on the vehicle. Therefore, water adhering to the periphery of the joint surface 50a, which is substantially vertically arranged between the inverter housing opening 53b and the motor housing opening 51a, can be allowed to flow downward quickly, and the possibility of water seeping into the interior of the motor housing 51A and the inverter housing 53A from the joint surface 50a can be suppressed.

[0111] In the aforementioned motorized two-wheeled vehicle 1, the motor housing 51A has a side opening 51B that opens along the width direction of the vehicle 1 and exposes the rotating shaft 51b of the motor 51 and the wiring 543. The side opening 51B is formed by the periphery of a protrusion 511 that protrudes outward from the motor housing 51A in the width direction. When viewed from the side of the vehicle 1, the upper protrusion 51c of the protrusion 511, which is located above the rotating shaft 51b, is inclined downward toward the rear of the vehicle 1.

[0112] According to this structure, water adhering to the upper protrusion 51c can flow in the direction of separation from the motor housing opening 51a located on the front side (rear), thus suppressing water from entering the power unit 50 from the joint surface 50a.

[0113] In the aforementioned motorized two-wheeled vehicle 1, the lower protrusion 51e of the protrusion 511, which is located below the rotation axis 51b, tilts downward toward the rear of the vehicle 1.

[0114] According to this structure, water adhering to the lower protrusion 51e can flow in the direction (rear) separating from the motor housing opening 51a located on the front side, thus suppressing the situation where water adheres to the connecting member located inside the motor housing opening 51a and the inverter housing opening 53b.

[0115] In the aforementioned motorized two-wheeled vehicle 1, the inverter 53 and the motor 51 are connected by an inverter-side wiring 542 connected to the inverter 53 and a motor-side wiring 543 connected to the motor 51. When viewed in the vehicle width direction, the connection part 54 connecting the inverter-side wiring 542 and the motor-side wiring 543 is exposed to the inside of the side opening 51B.

[0116] According to this structure, the inverter-side wiring 542 and the motor-side wiring 543 can be connected by accessing the inside of the side opening 51B from the opening, thus improving the connection operability.

[0117] In the aforementioned motorized two-wheeled vehicle 1, the inverter-side wiring 542 includes a terminal block 545 extending from the inverter housing 53A, and the motor-side wiring 543 is flexible.

[0118] This structure allows for easy deformation of the flexible motor-side wiring 543. Therefore, the motor-side wiring 543 can be easily connected to the terminal block 545, improving the ease of connection between the inverter-side wiring 542 and the motor-side wiring 543.

[0119] In the aforementioned motorized two-wheeled vehicle 1, when viewed in the vehicle width direction, the terminal plate 545 overlaps with the stator 56 of the motor 51.

[0120] According to this structure, when viewed in the vehicle width direction, even when the terminal block 545 is close to the stator 56 and the area for connecting the inverter-side wiring 542 and the motor-side wiring 543 becomes narrower, it is still easy to connect the motor-side wiring 543 and the inverter-side wiring 542.

[0121] In the aforementioned motorized two-wheeled vehicle 1, when viewed in the vehicle width direction, the radial side 50b of the motor housing 51A pointing towards the motor 51 overlaps with the terminal plate 545.

[0122] According to this structure, when viewed in the vehicle width direction, even when the terminal block 545 is close to the stator 56 and the area for connecting the inverter-side wiring 542 and the motor-side wiring 543 becomes narrower, it is still easy to connect the motor-side wiring 543 and the inverter-side wiring 542.

[0123] In addition, in the motorized two-wheeled vehicle 1 described above, when viewed in the vehicle width direction, an angle sensor 57 that detects the rotation angle of the motor 51 is disposed inside the side opening 51B, and a sensor line 546 that conducts the signal of the angle sensor 57 passes through the inside of the motor housing opening 51a and the inverter housing opening 53b.

[0124] According to this structure, the sensor line 546 can be arranged together with the wiring that connects the inverter 53 and the motor 51 using the motor housing opening 51a and the inverter housing opening 53b from the inverter housing side to the motor housing side. Therefore, it is not necessary to provide a separate opening for the sensor line 546, which simplifies the arrangement structure of the sensor line 546.

[0125] It should be noted that the present invention is not limited to the above-described embodiments. For example, the structure of the embodiments can also be applied to straddle-type vehicles other than motorized two-wheeled vehicles. The straddle-type vehicles include all vehicles where the driver straddles the vehicle, including not only motorized two-wheeled vehicles (including bicycles and small motorcycles with a prime mover), but also three-wheeled (including vehicles with two front wheels and one rear wheel, in addition to those with one front wheel and two rear wheels) or four-wheeled vehicles (such as four-wheeled buggies). Furthermore, it includes not only small motorcycles with a straddle space, but also vehicles with a straddle section. It can also be applied to vehicles whose prime mover includes an electric motor.

[0126] Furthermore, the structure described above is an example of the present invention, and the constituent elements of the embodiment can be replaced with well-known constituent elements, etc., and various changes can be made without departing from the spirit of the present invention.

Claims

1. A straddle-type vehicle, comprising: Motor (51) that drives the vehicle (1); An inverter (53) that controls the motor (51); Motor housing (51A) that houses the motor (51); Inverter housing (53A) housing the inverter (53); and A power unit (50) that integrates the motor housing (51A) and the inverter housing (53A). in, The motor housing (51A) has a motor housing opening (51a) that allows the interior of the motor housing (51A) to communicate with the exterior. The inverter housing (53A) has an inverter housing opening (53b) that connects the interior of the inverter housing (53A) to the exterior. The inverter (53) and the motor (51) are electrically connected to each other via the motor housing opening (51a) and the inverter housing opening (53b). When the power unit (50) is mounted on the vehicle (1), the mating surface (50a) where the motor housing opening (51a) and the inverter housing opening (53b) engage with each other is approximately vertical relative to the horizontal plane.

2. The straddle-type vehicle according to claim 1, wherein, The motor housing (51A) has a side opening (51B) that opens along the width direction of the vehicle (1) and exposes the rotating shaft (51b) and wiring (543) of the motor (51). The side opening (51B) is formed by the periphery of a protrusion (511) that protrudes outward from the motor housing (51A) in the vehicle width direction. When viewed from the side, the upper protrusion (51c) of the protrusion (511), which is located above the rotation axis (51b), is tilted downward toward the rear of the vehicle (1).

3. The straddle-type vehicle according to claim 2, wherein, The lower protrusion (51e) of the protrusion (511), located below the rotating shaft (51b), is inclined downward toward the rear of the vehicle (1).

4. The straddle-type vehicle according to claim 2, wherein, The inverter (53) and the motor (51) are connected by an inverter-side wiring (542) connected to the inverter (53) and a motor-side wiring (543) connected to the motor (51). Viewed in the vehicle width direction, the connection part (54) connecting the inverter-side wiring (542) and the motor-side wiring (543) is exposed to the inside of the side opening (51B).

5. The straddle-type vehicle according to claim 4, wherein, The inverter-side wiring (542) includes a terminal block (545) extending from the inverter housing (53A). The motor-side wiring (543) is flexible.

6. The straddle-type vehicle according to claim 5, wherein, Viewed in the vehicle width direction, the terminal block (545) overlaps with the stator (56) of the motor (51).

7. The straddle-type vehicle according to claim 5, wherein, Viewed in the vehicle width direction, the radial side (50b) of the motor housing (51A) pointing towards the motor (51) overlaps with the terminal plate (545).

8. The straddle-type vehicle according to claim 2, wherein, When viewed in the vehicle width direction, an angle sensor (57) that detects the rotation angle of the motor (51) is disposed inside the side opening (51B), and a sensor line (546) that enables the signal of the angle sensor (57) to pass through the inside of the motor housing opening (51a) and the inverter housing opening (53b).

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