Motor unit

Abstract

Motor unit (10) attached to a vehicle to propel the vehicle, the motor unit (10) comprising: a motor (1), a transmission mechanism (5) transmitting the power of the motor (1) and delivering it from an output shaft (55), and a housing (6) in which the motor (1) and the transmission mechanism (5) are housed, the transmission mechanism (5) comprising: a motor drive shaft (11) extending along a motor axis (J1) and rotated by the motor (1), a motor drive gear (21) attached to the motor drive shaft (11) and rotating about the motor axis (J1), a countershaft (13) extending along a countershaft axis (J3), a countershaft gear (23) attached to the countershaft (13) and meshing with the motor drive gear (21), and rotating about the countershaft axis (J3), a drive gear (24), which is attached to the countershaft (13) and rotates around the countershaft axis (J3), a ring gear (51),which meshes with the drive gear (24) and rotates about an output axis (J4), and the output shaft (55) which is connected to the ring gear (51) and rotates about the output axis (J4), wherein the motor axis (J1), the countershaft (J3) and the output axis (J4) extend parallel to each other, wherein the motor drive shaft (11) is a hollow shaft opening on both sides of the motor axis (J1), wherein the output shaft (55) passes through the interior of the motor drive shaft (11), and the countershaft (J3) lies above the motor axis (J1) with respect to the direction of gravity, wherein a line segment which, when viewed from the axial direction of the motor axis (J1), imaginarily connects the motor axis (J1) and the countershaft (J3) is defined as the first line segment (L1), wherein the first line segment (L1) forms an angle with respect to the direction of gravity (α) forms, which lies within 45°, wherein the motor unit (10) has: oil (O),the oil circulates in an oil channel (90) provided in the housing (6), and an oil pump (96) arranged in the path of the oil channel (90) and supplying the oil (O) under pressure, wherein the oil pump (96) is located above the motor axis (J1) with respect to the direction of gravity, wherein the oil pump (96) has a pump motor (96m) having an axis of rotation (J6) extending parallel to the motor axis (J1), wherein a line segment which, when viewed from the axial direction of the motor axis (J1), imaginarily connects the motor axis (J1) and the axis of rotation (J6) is defined as the second line segment (L2), wherein the second line segment (L2) forms an angle (β) with respect to the direction of gravity which is within 45°, and wherein the first line segment (L1) and the second line segment (L2) are on opposite sides of a line segment formed by the motor axis (J1) and the direction of gravity are arranged in a spanned plane.

Description

TECHNICAL AREA

[0001] The invention relates to a motor unit. This application is based on Japanese patent application no. 2018-185579, filed on September 28, 2018. This application claims priority from that patent application. All of its contents are incorporated herein by reference. BACKGROUND TECHNOLOGY

[0002] In recent years, the development of drive systems for electric vehicles has been actively pursued. Patent document 1 describes a drive system (motor unit) that is miniaturized by having an output shaft pass inside a rotating hollow shaft of a motor. State of the art document / Patent document

[0003] Patent document 1: Japanese patent publication no. 2018-185579 OVERVIEW OF THE INVENTION Problems to be solved by the present invention

[0004] Generally, the engine unit is located in front of or behind the passenger compartment of the vehicle. Additionally, collision zones are provided in front of and behind the passenger compartment to improve passenger safety in the event of a collision. To ensure the vehicle's collision zone is adequate, the engine unit reduces the vehicle's size both frontally and rearward.

[0005] One of the objectives of an aspect of the present invention is to provide a motor unit that can adequately safeguard the collision area of ​​the vehicle by reducing its size in the front and rear directions of the vehicle. Means to solve the problem

[0006] The motor unit of one aspect of the present invention is mounted on a vehicle and propels the vehicle. The motor unit comprises: a motor, a transmission mechanism that transmits the power of the motor and delivers it to the output shaft, and a housing in which the motor and the transmission mechanism are housed.The transmission mechanism comprises: a motor input shaft extending along the motor axis and rotated by the motor; a motor input gear attached to the motor input shaft and rotating about the motor axis; a countershaft extending along the countershaft axis; a countershaft gear attached to the countershaft and meshing with the motor input gear, rotating about the countershaft axis; a drive gear attached to the countershaft and rotating about the countershaft axis; a ring gear meshing with the drive gear and rotating about the output shaft; and an output shaft connected to the ring gear and rotating about the output shaft. The motor axis, countershaft, and output shaft extend parallel to each other. The motor input shaft is a hollow shaft opening at both ends of the motor axis. The output shaft passes through the interior of the motor input shaft.The intermediate axle is located above the engine axle with respect to the direction of gravity. Inventive effect

[0007] According to one aspect of the present invention, a motor unit is provided which is able to adequately ensure the collision area of ​​the vehicle by reducing the size of the vehicle in the front and rear directions. List of characters Fig. Figure 1 is a conceptual representation of a motor unit according to one embodiment. Fig. Figure 2 is a perspective view of a motor unit according to one embodiment. Fig. Figure 3 is a side view of a motor unit according to one embodiment. Fig. Figure 4 is a perspective exploded view of a motor unit according to one embodiment. Fig. Figure 5 is a perspective exploded view of a motor unit according to one embodiment. Fig. Figure 6 is a schematic sectional view of the motor unit. DETAILED EXECUTION

[0008] The motor unit according to the embodiment of the present invention is explained below with reference to the drawings. The scope of the present invention is not limited to the following embodiments and may be arbitrarily modified within the framework of the technical concept of the present invention. In the following drawings, the scale and number of each structure may differ from the scale and number of the actual structure to make each configuration easily understandable.

[0009] In the following description, the direction of gravity is defined based on the positional relationship in which a motor unit is located. 1mounted on a vehicle on a horizontal road surface. The drawings further depict an XYZ coordinate system appropriately represented as a three-dimensional orthogonal coordinate system. In the XYZ coordinate system, the direction of the Z-axis indicates the vertical direction (i.e., an up-down direction), the +Z direction is oriented upwards (towards one side opposite the direction of gravity), and the -Z direction is oriented downwards (in the direction of gravity). Therefore, in this description, when it is simply referred to as the top, it means the top with respect to the direction of gravity. Furthermore, the direction of the X-axis is perpendicular to the direction of the Z-axis and indicates a front-to-back direction of the vehicle with the engine unit. 10The +X direction points towards the front of the vehicle and the -X direction towards the rear. The Y-axis direction is perpendicular to both the X-axis and Z-axis directions and represents the width (left-right) of the vehicle, with the +Y direction pointing towards the left side of the vehicle and the -Y direction pointing towards the right side.

[0010] Fig. Figure 1 is a conceptual representation of a motor unit 10 according to one embodiment. Fig. Figure 2 is a perspective view of the engine unit 10 Additionally, the motor axle J1 , the intermediate axle J3 , the output axis J4 , the axis of rotation J6 The first central axis J7c and the second central axis J7e, which will be described later, are virtual axes that do not actually exist.

[0011] The engine unit 10It is mounted on a vehicle and propels the vehicle by turning the wheels H. The motor unit 10 For example, it is mounted on an electric vehicle (EV). Additionally, the motor unit must 10 It can only be fitted to a vehicle that uses an engine as an energy source, such as a hybrid electric vehicle (HEV), a plug-in hybrid electric vehicle (PHV), and the like.

[0012] As in Fig. As shown in 1, the motor unit 10 on: an engine 1 , a transmission mechanism (transmission axle) 5 , a case 6 , in which the engine 1 and the transmission mechanism 5 are housed an oil pump 96 , an oil cooler 97 , a parking locking mechanism 7 , Öl O , an inverter unit 8 . (Housing)

[0013] The case 6The housing is formed, for example, by aluminum die casting. 6 It is configured by connecting several components arranged in the direction of the vehicle's width. Inside the housing 6 A storage space 6S is provided in which the motor 1 and the transmission mechanism 5 are housed in the casing 6 holds the engine 1 and the transmission mechanism 5 in storage compartment 6S. Storage compartment 6S is located in engine compartment 6A, in which the engine 1 is housed, and a gearbox chamber 6B in which the gearbox mechanism is located. 5 is housed in a subdivided manner.

[0014] The case 6 indicates: a motor mounting section 62 , which is equipped inside with a motor chamber 6A to house the motor 1 to record, a gear mounting section 63 , which is equipped internally with a gear chamber 6B to house the gear mechanism 5to include, and a partition wall section 61 , which divides the engine compartment 6A and the transmission compartment 6B. The partition section 61 is located in the axial direction between the motor mounting section 62 and the gear mounting section 63 .

[0015] An oil reservoir P for the accumulation of oil O is located in a lower section of storage space 6S. In the partition wall section 61 A partition wall opening 61a is provided, separating the engine chamber 6A and the transmission chamber 6B. The partition wall opening 61a connects the engine chamber 6A and the transmission chamber 6B. Öl O In storage space 6S, the movement between the motor chamber 6A and the gearbox chamber 6B occurs via the partition opening 61a.

[0016] There is an oil channel in storage compartment 6S. 90 provided for, by the Öl O circulates. That Öl Ois drawn from the oil reservoir P each part of the engine unit 10 in the oil channel 90 supplied. The oil channel 90 will be described in detail later. ( Öl )

[0017] The Öl O It accumulates in the casing. Öl O circulates within the housing 6 planned oil channel 90 . The Öl O is used to operate the transmission mechanism 5 to lubricate and the engine 1 to cool. Öl O collects in the lower area (i.e., in the oil reservoir) P ) of the 6S storage space. To the Öl O To enable the functions of lubricating oil and cooling oil, a [missing word] is preferably used. Öl used, which is equivalent to a low viscosity automatic transmission fluid (ATF).

[0018] Part of the engine 1is in the oil reservoir P accumulated Öl O submerged. In particular, part of the stator 32 of the motor is 1 in the Öl O of the oil reservoir P immersed. In this way it cools Öl O the stator 32.

[0019] Additionally, part of the transmission mechanism 5 in the Öl O of the oil reservoir P immersed. In particular, part of the ring gear is 51 the transmission mechanism 5 in the Öl O of the oil reservoir P submerged. That in the oil reservoir P accumulated Öl O is caused by the action of the ring gear 51 lifted and diffused into gearbox chamber 6B. The substance that diffused into gearbox chamber 6B Öl O will be applied to the gears of the transmission mechanism 5fed into gearbox chamber 6B, so that the Öl O spreads across the tooth surfaces of the gears. Öl O , which is part of the transmission mechanism 5 The fluid supplied for lubrication drips and ends up in the oil reservoir. P Recovered. (Oil channel)

[0020] The oil canal 90 is in the case 6 planned. The oil channel 90 is configured to span the engine chamber 6A and the transmission chamber 6B of the storage compartment 6S. The oil channel 90 is one way to supply the oil O from the oil reservoir P to the engine 1 and to recirculate the oil O to the oil reservoir P .

[0021] Additionally, in this description, the "oil channel" refers to the path of the oil circulating in storage chamber 6S. OTherefore, the "oil channel" is a concept that encompasses not only the "flow path" that creates a steady oil flow stably oriented in one direction, but also the path along which the Öl temporarily remains (e.g. the oil reservoir) P ) and that Öl can fall off.

[0022] An oil pump 96 and an oil cooler 97 are at the oil channel 90 planned. In the oil canal 90 circulates Öl O in order of the oil reservoir P , the oil pump 96 , of the oil cooler 97 and the engine 1 and returns to the oil reservoir P back.

[0023] The oil pump 96 is in the way of the oil canal 90 provided and feeds the Öl O under pressure. The oil pump 96 is an electric pump powered by electrical energy. The oil pump 96is at the gear mounting section 63 of the case 6 attached.

[0024] As in Fig. Shown in section 2 is the oil pump. 96 in the case 6 The oil pump is provided and housed in the oil pump mounting bore 69. The oil pump mounting bore 69 extends axially. The oil pump mounting bore 69 opens to the left in the direction of the vehicle width (+Y direction). The inner circumferential surface of the oil pump mounting bore 69 is provided with a suction opening (not shown) for drawing in oil. Öl O into the oil pump 96 and an outlet opening (not shown) for supplying the oil O Opened under pressure on the downstream side.

[0025] The oil pump 96 features a pump motor 96m and a pump mechanism unit (not shown) that is powered by the pump motor 96m is driven. The pump motor 96mThe pump mechanism unit is located outside the opening of the oil pump receiving bore 69. Additionally, the pump mechanism unit is housed within the oil pump receiving bore 69.

[0026] The axis of rotation J6 of the pump motor 96m runs parallel to the engine axis J1 That is, the pump motor 96m rotates parallel to the motor axis J1 around the axis of rotation J6 The oil pump 96 with the pump motor 96m can easily be moved in the direction of the axis of rotation J6 can be extended. According to this embodiment, the size of the motor unit can be increased. 10 in the radial direction of the engine axis J1 can be reduced by adjusting the axis of rotation J6 of the pump motor 96m parallel to the engine axis J1 is done.

[0027] The pump mechanism unit is, for example, a trochoidal pump in which an internal gear and an external gear mesh and rotate. In this case, the internal gear of the pump mechanism unit is driven by the pump motor. 96m rotated. The gap between the inner gear and the outer gear of the pump mechanism unit is connected to the suction and the outlet opening.

[0028] As in Fig. As shown in 1, the oil pump draws in oil. 96 Öl O from the oil reservoir P via a flow path provided in the housing. The oil pump 96 delivers the aspirated Öl O to the oil cooler 97 .

[0029] The oil cooler 97 is in the way of the oil canal 90 provided and cools the Öl O , which goes through the oil channel 90 It ran. The oil cooler 97 is at the gear mounting section 63 of the case6 attached. The oil cooler 97 is connected to a refrigerant line 97j, through which the refrigerant, cooled by a cooler (not shown), flows. Öl O , which is through the inside of the oil cooler 97 The refrigerant flowing through refrigerant line 97j is cooled by heat exchange. Additionally, an inverter unit is installed. 8 in the path of the refrigerant line 97j. That is to say, the inverter unit 8 and the oil cooler 97 are connected to each other by a pipe (refrigerant line 97j), which forms a refrigerant path. The refrigerant flowing through refrigerant line 97j not only cools the oil cooler. 97 flowing Öl O , but also the inverter unit 8 .

[0030] The Öl O , which is through the oil cooler 97 was directed to the engine 1on the top of motor chamber 6A via one in the housing 6 fed into the designated flow path. This leads to the engine. 1 supplied Öl O flows from the top to the bottom along the outer circumferential surface of the motor. 1 and the coil surface of the stator 32 to dissipate the heat from the motor 1 to record. This allows the entire engine to be recorded. 1 It needs to be cooled. Öl O , which powers the engine 1 The cooled fluid falls downwards and collects in the lower area of ​​motor chamber 6A. The fluid that accumulates in the lower area of ​​motor chamber 6A Öl O moves across the partition wall opening 61a, which is located in the partition wall section 61 is intended for gearbox chamber 6B. (Motor)

[0031] The engine 1 It is a motor-generator that functions both as a motor and as a generator. The motor 1It mainly functions as an electric motor to propel the vehicle and as a generator during regeneration.

[0032] As in Fig. As shown in 1, the engine 1 a rotor 31 and a stator 32 surrounding the rotor 31. The rotor 31 can rotate around the motor axis. J1 The stator 32 has a ring shape. The stator 32 surrounds the rotor 31 from the radially outer side of the motor shaft. J1 .

[0033] The rotor 31 is attached to a motor drive shaft described later. 11 attached. The rotor 31 rotates around the motor axis. J1 The rotor 31 has a rotor core and a rotor magnet, which are held on the rotor core.

[0034] The stator 32 has a stator core and coils. The stator core has several teeth that run radially along the motor axis. J1 protrudes inwards. The coil is wound onto the teeth of the stator core.

[0035] The engine 1 is connected to the inverter 8a connected. The inverter 8a converts the direct current supplied by the battery (not shown) into alternating current and supplies it to the motor 1 The engine speed 1 is achieved by controlling the inverter 8a controlled. (gear mechanism)

[0036] The gear mechanism 5 transmits the power of the engine 1 and outputs them from the output shaft 55 out. The gear mechanism 5 It contains several mechanisms responsible for the energy transfer between the power source and the driven device.

[0037] The gear mechanism 5 indicates: an engine drive shaft 11 , a motor drive gear 21 , a countershaft 13, a countershaft gear (large gear section) 23, a drive gear (small gear section) 24, a ring gear 51 , an output shaft (axle) 55 and a differential device (differential gear) 50.

[0038] The gears and shafts of the transmission mechanism 5 can rotate around one of the engine axis J1 , the intermediate axle J3 or the output axis J4 rotate. In this embodiment, the motor shaft extends J1 , the intermediate axle J3 and the output axis J4 parallel to each other. Additionally, the motor shaft J1 , the intermediate axle J3 and the output axis J4 parallel to the width of the vehicle. In the following description, the axial direction refers to the axial direction of the engine shaft. J1 This means that the axial direction refers to a direction parallel to the motor axis. J1and refers to the vehicle width direction.

[0039] The engine drive shaft 11 extends along the engine axis J1 The engine drive shaft 11 is attached to rotor 31. The motor drive shaft 11 is from the engine 1 turned. A motor drive gear 21 is on the engine drive shaft 11 attached.

[0040] The engine drive shaft 11 extends in the axial direction along the motor axis J1 as the center point. The engine drive shaft 11 is a hollow shaft that is located on both axial sides of the motor shaft J1 is open. The external shape of the engine drive shaft 11 In the axial direction, it has a cylindrical shape that is attached to the motor shaft. J1 is centered. The engine drive shaft 11 is supported by bearings to rotate around the engine axis J1 to be rotatable. An output shaft. 55is through the inside of the engine drive shaft 11 led.

[0041] The motor drive gear 21 is on the engine drive shaft 11 attached. The motor drive gear 21 rotates together with the engine drive shaft 11 around the engine axis J1 .

[0042] The countershaft 13 extends along the reduction axis J3 The countershaft 13 rotates around the countershaft J3 The countershaft 13 is, for example, by a bearing (not shown) of the housing and the gear mechanism 5 Rotatable via a bearing (not shown). A countershaft gear. 23 , a drive gear 24 and a parking lock gear 7a are on the countershaft 13 attached.

[0043] The countershaft gear 23 is on the countershaft 13fastened. The countershaft gear 23 rotates together with the countershaft 13 around the reduction axle J3 The countershaft gear 23 combs with the motor drive gear 21 .

[0044] The drive gear 24 is on the countershaft 13 attached. The drive gear 24 rotates together with the countershaft 13 and the countershaft gear 23 around the reduction axle J3 The drive gear 24 is in the axial direction relative to the countershaft gear 23 on the opposite side of the engine 1 arranged.

[0045] The parking lock gear 7a is part of the parking locking mechanism 7 The parking lock gear 7a is on the countershaft 13 fastened. The parking lock gear. 7arotates together with the countershaft 13 , the countershaft gear 23 and the drive gear 24 around the reduction axle J3 The parking lock gear 7a is in the axial direction between the countershaft gear 23 and the drive gear 24 arranged.

[0046] The ring gear 51 is attached to the differential gear 50. The ring gear 51 rotates around the starting axis J4 The ring gear 51 combs with the drive gear 24 The ring gear 51 transmits the power via the drive gear 24 transmitted power of the engine 1 on the differential gear 50.

[0047] The differential gear 50 is a device for transmitting the power from the engine 1The differential gear 50 has the function of distributing the same torque to the wheels H of the vehicle. 55 to transmit the speed of the left and right wheels, while the speed difference between the left and right wheels H is absorbed when the vehicle turns.

[0048] The differential gear 50 has a gear housing (not shown) that is attached to the ring gear 51 Attached to it are a pair of pinions (not shown), a pinion shaft (not shown), and a pair of side gears (not shown). The gear housing rotates with the ring gear. 51 around the starting axis J4The gear housing contains a pair of pinions, a pinion shaft, and a pair of side gears. A pair of pinions consists of bevel gears facing each other. Two pinions are mounted on the pinion shaft. The side gear pair is a bevel gear that meshes perpendicularly with a pair of pinions. Each pair of side gears is mounted on the output shaft. 55 attached.

[0049] The output shaft 55 rotates around the starting axis J4 . In the engine unit 10 is a pair of output shafts 55 A pair of output shafts is planned. 55 Each end is connected to the side gears of the differential 50. That is to say, the output shaft 55 is connected via the differential gear 50 to the ring gear 51 connected. The power of the engine 1 The power is transferred via the gears to the output shaft. 55 transmitted. In addition, a pair of output shafts protrude from each shaft. 55at the other end towards the outside of the case 6 Out. A wheel H is at the other end of the output shaft. 55 attached. The output shaft 55 It releases force outwards (via the wheels H to the road surface).

[0050] In this embodiment, the output axis falls J4 with the motor axle J1 together. Additionally, one of the two output shafts engages. 55 into the interior of the engine drive shaft 11 , which is a hollow shaft. Therefore, the motor unit 10 The present embodiment is smaller compared to a motor unit with a structure in which the motor shaft J1 and the output axis J4 are arranged in different axes.

[0051] Fig. 3 is a side view of the motor unit 10 according to one embodiment.

[0052] The gear mechanism 5forms a power transmission path from the engine 1 to the output shaft 55 In the power transmission path of the gear mechanism 5 will the power of the engine 1 first from the motor drive gear 21 to the countershaft gear 23 transmitted. The countershaft gear 23 and the drive gear 24 are arranged coaxially and rotate together with the drive gear 24 The power of the engine 1 is from the drive gear 24 on the hollow gear 51 transmitted and via the differential gear 50 to the output shaft 55 transmitted. (The positional relationship between each axis)

[0053] As in Fig. As shown in figure 3, the reduction axle is located. J3 above the engine shaft J1 . Since, moreover, the motor axle J1 and the output axis J4 The intermediate axle is located where it coincides.J3 above the output axis J4 According to this embodiment, the centers of the countershaft gear are 23 and the drive gear 24 from an axial direction in the top-bottom direction relative to the centers of the motor 1 and the ring gear 51 shifted. Since the drive gear 24 and the ring gear 51 By interlocking them, the absolute distance between them is clearly determined. By shifting the motor axis J1 and the countershaft J3 Therefore, in the top-bottom direction, the dimensional components of the countershaft axle can be J3 and the engine axle J1 in the front-to-rear direction of the vehicle. As a result, the size of the engine unit can be reduced. 10 in the front-to-back direction of the vehicle, and it can be ensured that the collision area inside the vehicle is large.

[0054] In this embodiment, the intermediate shaft gear is located 23 and the drive gear 24 above the engine shaft J1 That is, the lower ends of the countershaft gear 23 and the drive gear 24 Both are located above the engine shaft. J1 Therefore, the drive gear 24 be arranged in such a way that, viewed from top to bottom, it largely corresponds to the ring gear 51 overlaps, and the size of the motor unit 10 The front-to-rear direction of the vehicle can be further reduced.

[0055] As in Fig. As shown in 3, the line segment that represents the motor axis J1 and the countershaft J3 imaginary connection, viewed from the axial direction as the first line segment L1 designated. The first line segment L1forms an angle α with a vertical line VL extending in a vertical direction. The angle α is preferably within 45°. That is, the first line segment L1 preferably extends in a direction within 45° of the vertical direction (the direction of gravity). As a result, the size of the motor unit can be reduced. 10 The angle α is further reduced in the front-to-back direction of the vehicle. Additionally, the angle α is preferably within 20°. This means that the first line segment... L1 preferably extends in one direction within 20° of the vertical direction. Consequently, the size of the motor unit can be adjusted. 10 further reduced in the front-to-rear direction of the vehicle.

[0056] The countershaft J3 is located closer to the rear (-X direction) of the vehicle than the engine axle J1 As described above, part of the ring gear51 in the Öl O of the oil reservoir P immersed. That Öl O is through the hollow gear 51 raised. When the vehicle moves forward, the ring gear rotates. 51 in the Fig. 3. Direction of rotation T1 shown. The direction of rotation T1 is the direction in which the ring gear rotates. 51 on the rear of the vehicle, rotating upwards. Therefore, the ring gear 51 raised Öl O more effectively distributed at the rear of the vehicle. According to this embodiment, by positioning the intermediate axle J3 closer to the rear of the vehicle than the engine axle J1 the through the hollow gear 51 raised Öl O efficiently to the front wheel 23 and the drive gear 24 are supplied. As a result, the lubricity of the tooth surfaces of the countershaft gear can be improved. 23and the drive gear 24 to be improved, and the power transmission efficiency of the gear mechanism 5 can be improved.

[0057] As in Fig. The oil pump is located as shown in section 3. 96 above the engine axis line J1 That is, the lower end of the oil pump. 96 is located above the engine shaft J1 According to the present embodiment, in comparison to the case where the oil pump and the engine shaft J1 are arranged side by side in the front and rear direction of the vehicle, the size of the engine unit 10 in the front-to-rear direction of the vehicle, the size of the engine unit can be further reduced. 10 in the front-to-back direction of the vehicle, and it can be ensured that the collision area inside the vehicle is large.

[0058] The oil pump 96is in relation to the engine axle J1 It is positioned diagonally above the front of the vehicle. In other words, the oil pump is located there. 96 above the engine shaft J1 and closer to the front (+X direction) of the vehicle than the engine axis J1 As described above, they are located on the top of the motor shaft. J1 the countershaft gear 23 and the drive gear 24 closer to the rear (-X direction) of the vehicle than the engine axis J1 Therefore, in the present embodiment, the oil pump can 96 , the countershaft gear 23 and the drive gear 24 in the front-to-back direction of the vehicle above the engine axle J1 can be moved. This allows the size of the motor unit to be adjusted. 10 will be reduced.

[0059] As described above, the oil pump 96 the pump motor 96mon, which runs parallel to the engine axis J1 around the axis of rotation J6 turns. As in Fig. As shown in 3, the line segment that represents the motor axis J1 and the axis of rotation J6 imaginary connection, viewed from the axial direction as the second line segment L2 designated. The second line segment L2 forms an angle β with a vertical line VL extending in a vertical direction. The angle β is preferably within 45°. That is, the second line segment L2 preferably extends in one direction within 45° of the vertical direction. As a result, the size of the motor unit can be reduced. 10 in the front-to-back direction of the vehicle. Additionally, the angle β is preferably within 35°. That is, the second line segment L2preferably extends in a direction within 35° of the vertical direction. Consequently, the size of the motor unit can be adjusted. 10 further reduced in the front-to-back direction of the vehicle.

[0060] The oil cooler 97 is located above the engine shaft J1 That is, the lower end of the oil cooler. 97 is located above the engine shaft J1 According to the present embodiment, in comparison to a case where the oil cooler and the engine axle J1 are arranged side by side in the top-bottom direction of the vehicle, the size of the engine unit 10 further reduced in the front-to-back direction of the vehicle.

[0061] The oil cooler 97 is next to the oil pump 96 above the engine shaft J1 arranged. The oil cooler 97 and the oil pump 96 are via one in the case 6The intended flow path is connected to each other. By arranging the oil coolers in series. 97 and the oil pump 96 can the flow path that passes through the oil cooler 97 and the oil pump 96 connects, can be shortened. This allows the oil channel to be 90 The forming flow path is shortened and the circulation efficiency of the oil is improved. O in the oil channel 90 can be improved.

[0062] The oil cooler 97 is located closer to the front (+ X-direction) of the vehicle than the engine axis J1 That means the oil cooler 97 is in relation to the engine axle J1 arranged on the sloping upper surface of the front of the vehicle. According to this embodiment, the oil cooler can 97 air cooling occurs when the vehicle moves forward, and the cooling efficiency of the oil O through the oil cooler 97 can be improved. (Parking locking mechanism)

[0063] The parking locking mechanism 7 It is driven according to the driver's gear shifting. The parking lock mechanism 7 switches between a locked state, which limits power transmission in the transmission mechanism 5 restricts, and an unlocked state that removes the restriction.

[0064] As in Fig. As shown in Figure 3, the parking locking mechanism features 7 a parking lock gear 7a , a parking lock arm 7b , an arm support shaft 7e, a parking lock actuator 7c and a parking lock power transmission mechanism 7d.

[0065] The parking lock gear 7a is on the countershaft 13 fastened. The parking lock gear. 7a rotates together with the countershaft 13 around the reduction axle J3 . On the outer circumferential surface of the parking lock gear7a Several teeth are provided that are aligned radially with the countershaft axis. J3 protrude outwards and in the circumferential direction of the reduction axle J3 are arranged.

[0066] The parking lock arm 7b It has a plate shape that extends along a plane perpendicular to the axial direction. The parking locking arm 7b The parking locking arm is rotatably supported by an arm support shaft 7e, which is centered on a second central axis J7e extending in the axial direction. 7b extends upwards from the arm support shaft 7e.

[0067] The parking lock arm 7b extends along the outer circumferential surface of the parking lock gear 7a The parking lock arm 7b is the tooth section of the parking lock gear 7a in the radial direction of the countershaft axis J3 Facing the parking lock arm. 7bhas an engagement section 7ba opposite the tooth section of the parking lock gear. 7a The engagement section 7ba projects towards the radial inside of the reduction gear axis. J3 The engagement section 7ba meshes with the teeth of the parking lock gear. 7a That is, the parking lock arm 7b meshes with the parking lock gear at engagement section 7ba.

[0068] The parking lock arm 7b is operated by the parking lock actuator 7c driven and rotates within a predetermined range around the second central axis J7e. When the parking locking mechanism 7 It is locked by the driver's operation and rotates in Fig. 3 the parking lock arm 7b counterclockwise around the second central axis J7e, so that the engagement section 7ba and the teeth of the parking lock gear 7ainterlock. This reduces the rotation of the countershaft. 13 suppresses and the power transmission in the transmission mechanism 5 is restricted. On the other hand, if the parking lock mechanism... 7 When unlocked by the driver's operation, the parking lock arm rotates. 7b clockwise around the second central axis J7e, and the engagement section 7ba is formed by the tooth section of the parking lock gear 7a released. As a result, the countershaft can 13 freely rotating, and the gear mechanism 5 is in a state capable of transmitting power.

[0069] According to this embodiment, the parking locking arm extends 7b in the top-bottom direction. Viewed from the axial direction, the countershafts 13 and the parking lock arm 7bThey are arranged side-by-side in the front-to-rear direction of the vehicle. Therefore, the dimensions of the engine unit can be 10 The movement is suppressed in the up-down direction. Additionally, part of the parking lock arm overlaps. 7b from the axial direction the countershaft gear 23 Even if the parking lock arm 7b and the countershaft 13 Since they are arranged side by side in the front-to-back direction of the vehicle, it is therefore possible to increase the size of the engine unit. 10 to suppress in the front-to-back direction of the vehicle.

[0070] The parking lock force transmission mechanism 7d is located between the parking lock actuator. 7c and the parking lock arm 7b The parking lock power transmission mechanism 7d transmits the force of the manual shaft 7ca, which rotates about the first central axis J7c, to the parking lock arm. 7band rotates the parking lock arm 7b around the second central axis J7e.

[0071] The parking lock actuator 7c It has a manual shaft 7ca centered on a first central axis J7c extending in the top-bottom direction. The parking lock actuator 7c The manual shaft 7ca rotates around the first central axis J7c. The parking lock actuator 7c drives the parking lock arm 7b via the parking lock power transmission mechanism 7d.

[0072] The parking lock actuator 7c is on the top of the case 6 It is attached. In particular, the parking lock actuator is located there. 7c directly above the reduction axle J3 This means that, viewed from the top-bottom direction, the parking lock actuator overlaps. 7c with the countershaft J3 This allows the size of the motor unit to be adjusted. 10to be reduced in the horizontal direction.

[0073] As in Fig. Figure 2 shows the parking lock actuator. 7c on the outer surface of the gear mounting section 63 of the case 6 attached. The parking lock actuator 7c is located on the side of the gear mounting section 63 in relation to the partition wall section 61 of the case 6 That is, according to the present embodiment, the parking lock actuator overlaps. 7c the partition wall section 61 Not when viewed from a top-to-bottom perspective. To ensure the strength of the entire housing. 6 to maintain, the partition wall section 61 a form which, in relation to the engine 1 and the transmission mechanism 5 radially from the engine axis J1protrudes. According to this embodiment, it is possible to increase the projected area of ​​the motor unit. 10 to suppress in the axial direction, since the parking lock actuator 7c and the partition wall section 61 do not overlap in the top-bottom direction, and a reduction in the size of the motor unit 10 to reach.

[0074] As in Fig. The parking lock gear is shown in figure 1. 7a between the countershaft gear 23 and the drive gear 24 in the axial direction of the countershaft axis J3 According to the present embodiment, in comparison to a case in which the parking locking gear is located on the opposite side of the partition section, 61 with regard to the countershaft gear 23 and the drive gear 24 is arranged, the parking lock gear 7a near the partition wall section 61be arranged. This makes it possible to prevent the parking lock arm from 7b , which runs along the outer circumference of the parking lock gear 7a is arranged towards the radially outer side of the reduction axle J3 protrudes, thereby reducing the size of the motor unit 10 is achieved. (Inverter unit)

[0075] As in Fig. 2 shown, the inverter unit 8 the inverter 8a and the inverter housing 8b, which houses the inverter 8a records, although not shown, the inverter unit has 8 also a circuit board and a capacitor.

[0076] Viewed from top to bottom, the inverter unit 8 an essentially rectangular shape. The inverter unit 8 is on the outer surface of the housing 6 fastened. In particular, the inverter unit is8 on the outer surface of the motor mounting section 62 of the case 6 attached to the inverter housing 8b. The inverter unit 8 is connected to a busbar (not shown) of the motor 1 on the top of the engine 1 connected. The inverter unit 8 supplies the engine 1 AC power is supplied via the busbar. This supplies the inverter unit with alternating current. 8 the engine 1 with electrical energy.

[0077] The inverter unit 8 It is located directly above the engine 1 That is, the inverter unit 8 It is located on the top of the engine. 1 and overlaps with the motor from the top-bottom direction. 1 Consequently, compared to the case where the inverter unit 8 in the front and rear direction of the vehicle in relation to the engine 1is arranged, the size of the motor unit 10 The impact area is reduced in both the front and rear directions of the vehicle. This makes it possible to ensure a large collision area within the vehicle.

[0078] In general, the projected area of ​​the motor mounting section 62 smaller in the axial direction than the projected area of ​​the gear mounting section 63 in the axial direction. According to this embodiment, since the inverter unit 8 on the radial outside of the motor mounting section 62 is arranged, easily, the inverter unit 8 and the gear mounting section 63 to be arranged overlapping in the axial direction. Consequently, the projected area of ​​the entire motor unit can be 10 in the axial direction, and the size of the motor unit 10 can be reduced.

[0079] As in Fig. Figure 3 shows at least a portion of the inverter unit overlapping when viewed from an axial direction. 8 the countershaft gear 23 By overlapping the inverter unit 8 and the countershaft gear 23 can the projected area of ​​the motor unit 10 in the axial direction, and the size of the motor unit 10 can be reduced.

[0080] Viewed from the axial direction, at least part of the inverter unit overlaps. 8 the oil pump 96 Similarly, at least part of the inverter unit overlaps in the axial direction. 8 the oil cooler 97 . By overlapping the inverter unit 8 with the oil pump 96 and the oil cooler 97 can the projected area of ​​the motor unit 10 in the axial direction, and the size of the motor unit 10can be reduced.

[0081] Fig. 4 and Fig. 5 are perspective exploded views of the engine unit 10 and are representations in which the inverter unit 8 from the case 6 is separated. In the Fig. 4 and Fig. 5. The directions of the perspective views of the engine unit differ. 10 from each other.

[0082] As in Fig. 4 and Fig. As shown in 5, the inverter unit is 8 in several fastening sections 40 and 45 on the case 6 the engine unit 10 fastened. The several fastening sections 40 and 45 are incorporated into a first fastening section 40 (see Fig. 4) and a second fastening section 45 (see Fig. 5) divided. The first fastening section 40is located in relation to the engine axle J1 on the front of the vehicle, and the second fastening section 45 is located in relation to the engine axle J1 on the rear of the vehicle.

[0083] As in Fig. As shown in section 4, the first fastening section 40 on: an eaves section 42 , which is connected to the inverter unit 8 is intended to be an opposite surface 43 , which are attached to the casing 6 is provided, and a fastening screw 41 .

[0084] The eaves section 42 of the first fastening section 40 is positioned horizontally on the outer surface of the inverter housing 8b of the inverter unit 8 before. The eaves section 42 is equipped with a through hole 42a provided, which penetrates in the top-bottom direction.

[0085] The opposite surface43 of the first fastening section 40 is the eaves section 42 in the top-bottom direction opposite. In this embodiment, the opposite surface 43 on the case 6 provided that it is located on the underside of the inverter unit 8 is located. Therefore, in this embodiment, the opposite surface is shown. 43 of the first fastening section 40 upwards. The opposite surface 43 is with a threaded hole 43a provided, extending in the top-bottom direction and towards the eaves section 42 (i.e., towards the top) opens.

[0086] The fastening screw 41 of the first fastening section 40 is through the through hole 42a of the eaves section 42 in the threaded hole 43a the opposite surface 43screwed together. This means the lower surface of the eaves section is exposed. 42 and the opposite surface 43 in contact, and the inverter unit 8 and the case 6 are attached to each other.

[0087] As in Fig. As shown in section 5, the second fastening section 45 on: an eaves section 47 , which is attached to the casing 6 is intended to be an opposite surface 48 , which are connected to the inverter unit 8 is provided, and fastening screws 46 .

[0088] The eaves section 47 of the second fastening section 45 protrudes horizontally from the outer surface of the motor mounting section 62 of the case 6 The eaves section stands out. 47 is equipped with a through hole 47a provided, which penetrates in the top-bottom direction.

[0089] The opposite surface 48 of the second fastening section 45 is the eaves section 47 facing in the top-bottom direction. In this embodiment, the opposite surface 48 at the inverter unit 8 provided, which are located on the top of the housing 6 is located. Therefore, in this embodiment, the opposite surface is shown. 48 of the second fastening section 45 downwards. The opposite surface 48 is with a threaded hole 48a provided, extending in the top-bottom direction and towards the side of the eaves section 47 (i.e., to the underside) opens.

[0090] The fastening screw 46 of the second fastening section 45 is through the through hole 47a of the eaves section 47 in the threaded hole 48a the opposite surface48 screwed together. This means the upper surface of the eaves section is exposed. 47 and the opposite surface 48 in contact, and the inverter unit 8 and the case 6 are attached to each other.

[0091] Viewed from the top-bottom direction, the first fastening section 40 and the second fastening section 45 on opposite sides of the engine shaft J1 arranged. Furthermore, the eaves section protrudes from the vertical direction. 42 and 47 of the first fastening section 40 and the second fastening section 45 each in a direction away from the engine axis J1 stand out.

[0092] According to this embodiment, the eaves section 42 of the first fastening section 40 and the eaves section 47 of the second fastening section 45, located on opposite sides of the engine shaft J1 are located separately in the inverter unit 8 and the case 6 provided for. Compared to the case where all eaves sections are in one of the inverter units. 8 and the casing 6 Therefore, the size of the motor unit can be determined. 10 in the front-to-back direction of the vehicle.

[0093] Fig. Figure 6 is a schematic cross-sectional view of the motor unit 10 Additionally, in Fig. 6. The detailed structure of each part (for example, the coil of the stator 32, the rotor magnet of the rotor 31, etc.) has been omitted.

[0094] The inverter unit 8 has a case 6 opposite lower surface 8s The lower surface 8sis a flat surface along the horizontal direction. Viewed from the top-bottom direction, the lower surface is 8s the inverter unit 8 of several fastening sections (the first fastening section) 40 and the second fastening section 45 ) surrounded. That is, the several fastening sections 40 and 45 are around the lower surface 8s arranged around.

[0095] As in Fig. 4 and Fig. Shown in section 5 is the outer surface of the motor mounting section. 62 of the case 6 provided with a first rib 62a and a second rib 62b extending radially to the motor axis J1 protrude. The first rib 62a extends along the axial direction of the motor axis. J1 The first rib 62a is located directly above the motor. 1The second rib 62b extends along the circumferential direction of the motor axis. J1 .

[0096] As in Fig. As shown in Figure 6, the first rib 62a and the second rib 62b have a notched surface. 62s provided along the lower surface 8s the inverter unit 8 It is cut. That is, the notched surface. 62s is on the outer surface of the housing 6 provided. The notched surface 62s is a flat surface along the horizontal direction. The notched surface 62s The lower surface lies 8s the inverter unit 8 in the top-bottom direction with a gap in between opposite sides.

[0097] The fastening screws 41 and 46 exert surface pressure on the contact surfaces of the housing. 6 and the inverter unit 8 in the first fastening section40 and the second fastening section 45 out. Therefore, in the first fastening section 40 and the second fastening section 45 the case 6 and the inverter unit 8 coupled in one piece. On the other hand, in the area where no surface pressure is exerted, when the housing 6 and the inverter unit 8 are in contact, the vibration of the housing 6 , which control the operation of the engine 1 and the transmission mechanism 5 accompanied, to the inverter unit 8 transferred so that the inverter unit 8 can be excited. If the inverter unit 8 When excited, various parts of the inverter unit can 8 (the inverter 8a(e.g., the circuit board, the capacitor, etc.) may be damaged. According to the present embodiment, in the area visible from the top-bottom direction, the mounting section 40 and 45 is surrounded by the case 6 and the inverter unit 8 Separated in the top-bottom direction. This makes it possible to reduce the transmission of vibrations from the housing. 6 on the inverter unit 8 to suppress, so that the inverter unit 8 is aroused.

[0098] Although embodiments of this invention have been described above, each structure in the embodiment and combinations thereof, etc., are examples, and additions, omissions, substitutions, and other modifications to the structure can be made without altering the meaning of this invention. The present invention is not limited to the embodiments described above. Reference symbol list 1: Engine; 5: Gear mechanism; 6: Housing; 7: Parking locking mechanism; 7a: Parking lock gear; 7b: Parking locking arm; 7c: Parking lock actuator; 8: Inverter unit 8a: Inverter; 8s: lower surface; 10: Motor unit; 11: Engine drive shaft; 13: Countershaft; 21: Motor drive gear; 23: Countershaft gear; 24: Drive gear; 40: first fastening section (fixed part); 45: second fastening section (fixed part); 41, 46: Fastening screw; 42, 47: Eaves section; 42a, 47a: Through hole; 43, 48: Opposite surface; 43a, 48a: Threaded hole; 51: Ring gear; 55: Output shaft; 61: Partition wall section; 62: Engine mounting section; 62s: notched surface; 63: Gear mounting section; 90: Oil channel; 96: Oil pump; 96m: Pump motor; 97: Oil cooler; J1: Engine axle; J3: Countershaft axle; J4: Exit axis; J6: Axis of rotation; L1: first line segment; L2: second line segment; O: Oil; P: Oil reservoir. QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] JP 2018185579

[0001]

Claims

[1] Engine unit attached to a vehicle to propel the vehicle, wherein the engine unit comprises: an engine a gear mechanism that transmits the power of the engine and delivers it to an output shaft, and a housing that contains the motor and the transmission mechanism, the transmission mechanism features: a motor drive shaft that extends along the motor axis and is rotated by the motor, a motor drive gear that is attached to the motor drive shaft and rotates around the engine axis, a countershaft extending along the countershaft axis, a countershaft gear that is attached to the countershaft and meshes with the engine drive gear, and that rotates around the countershaft axis, a drive gear attached to the countershaft and rotating around the countershaft axis, a ring gear meshing with the drive gear and rotating around the output axis, and the output shaft connected to the ring gear and rotating around the output axis, wherein the motor shaft, the intermediate shaft and the output shaft extend parallel to each other, wherein the motor drive shaft is a hollow shaft opening on both sides of the motor shaft, wherein the output shaft passes through the interior of the motor drive shaft, and the countershaft is located above the motor shaft with respect to the direction of gravity. [2] Motor unit according to claim 1, wherein the countershaft gear and the drive gear are located above the motor axis with respect to the direction of gravity. [3] Motor unit according to claim 1 or 2, wherein, viewed from the axial direction of the motor axis, a line segment which imaginarily connects the motor axis and the reduction axis is defined as the first line segment, wherein the first line segment extends in a direction within 45° with respect to the direction of gravity. [4] Motor unit according to one of claims 1 to 3, wherein in the motor unit oil is stored in an oil reservoir in the housing and part of the ring gear is immersed in the oil in the oil reservoir, wherein the reduction shaft is located closer to the rear of the vehicle than the motor shaft. [5] Motor unit according to any one of claims 1 to 4, wherein the motor unit comprises: Oil circulating in the oil channel provided in the housing, and an oil pump that is positioned in the path of the oil channel and feeds the oil under pressure, the oil pump is located above the engine axis with respect to the direction of gravity. [6] Motor unit according to claim 5, wherein the oil pump has a pump motor which rotates about an axis of rotation which is parallel to the motor axis, and If, viewed from the axial direction of the motor axis, a line segment that imaginarily connects the motor axis and the axis of rotation is defined as the second line segment, where the second line segment extends in a direction within 45° of the direction of gravity. [7] Engine unit according to claim 5 or 6, wherein the oil pump is located closer to the front of the vehicle than to the engine axle. [8] Engine unit according to any one of claims 5 to 7, wherein the engine unit has an oil cooler provided in the path of the oil channel to cool the oil, wherein the oil cooler is arranged next to the oil pump in a position above the engine axis with respect to the direction of gravity. [9] Engine unit according to claim 8, wherein the oil cooler is located closer to the front of the vehicle than to the engine axle. [10] Motor unit according to any one of claims 1 to 9, wherein the motor unit has a parking locking mechanism provided in the transmission mechanism and switches between a locked state which restricts the power transmission in the transmission mechanism and an unlocked state which removes the restriction, wherein the parking locking mechanism comprises: a parking lock gear attached to the countershaft, a parking lock arm that meshes with the parking lock gear, and a parking lock actuator that drives the parking lock arm, the parking lock drive is located directly above the reduction axle. [11] Motor unit according to any one of claims 1 to 10, wherein the motor unit has an inverter unit which supplies power to the motor, wherein the inverter unit is located directly above the motor, wherein, viewed from the axial direction of the motor axis, at least a part of the inverter unit overlaps the countershaft gear.

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