CN111512525A

CN111512525A - Motor unit

Info

Publication number: CN111512525A
Application number: CN201880084287.7A
Authority: CN
Inventors: 福永庆介; 中间隼人
Original assignee: Nidec Corp
Current assignee: Nidec Corp
Priority date: 2017-12-28
Filing date: 2018-12-20
Publication date: 2020-08-07
Also published as: WO2019131425A1

Abstract

The motor unit has: a motor having a rotor that rotates about a motor axis; a housing that houses the motor; and a flexible linear member extending along the outer peripheral surface of the housing. The housing member has a housing main body for housing the motor and a plate-like cover member. The housing main body is provided with a window portion. The cover member covers the window portion from outside the housing main body. The cover member is provided with a holding portion for holding the linear member.

Description

Motor unit

Technical Field

The present invention relates to a motor unit.

Background

In recent years, a motor unit for a vehicle, in which a motor and a reduction gear are unitized, has been actively developed. A linear member such as an electric wire or a cooling hose is connected to the motor unit and extends outside the motor unit. For example, japanese laid-open gazette: japanese patent laid-open No. 2009-177968 describes the following structure: in a motor provided with a resolver that detects a rotation angle of a rotor, a sensor harness for resolver communication extends from a housing.

Documents of the prior art

Patent document

Patent document 1: japanese laid-open gazette: japanese patent laid-open publication No. 2009-177968

Disclosure of Invention

Problems to be solved by the invention

The linear member connected to the motor unit may vibrate due to vibration of the vehicle. Therefore, the linear member is fixed to the vehicle interior by a holding member such as a bracket. If such a structure is adopted, not only the number of parts required for the bracket and the fixing structure thereof increases, but also there is a problem that the manufacturing cost increases due to the increase of the fixing process.

In view of the above-described problems, an object of one embodiment of the present invention is to provide a motor unit capable of holding a linear member with a simple configuration and suppressing the jitter of the linear member.

Means for solving the problems

One embodiment of a motor unit according to the present invention includes: a motor having a rotor that rotates about a motor axis; a housing that houses the motor; and a flexible linear member extending along an outer peripheral surface of the housing. The housing member has a housing main body for housing the motor and a plate-like cover member. The housing main body is provided with a window portion. The cover member covers the window portion from outside the housing main body. The cover member is provided with a holding portion that holds the linear member.

Effects of the invention

According to one aspect of the present invention, there is provided a motor unit capable of holding a linear member with a simple configuration and suppressing the jitter of the linear member.

Drawings

Fig. 1 is a conceptual diagram of a motor unit according to an embodiment.

Fig. 2 is a perspective view of a motor unit according to an embodiment.

FIG. 3 is an exploded view of an embodiment of a housing.

FIG. 4 is a side view of one embodiment of a motor unit.

FIG. 5 is a side view of one embodiment of a motor unit.

Detailed Description

Hereinafter, a motor unit according to an embodiment of the present invention will be described with reference to the drawings. The scope of the present invention is not limited to the following embodiments, and can be arbitrarily changed within the scope of the technical idea of the present invention.

In the following description, the direction of gravity is defined according to the positional relationship when the motor unit is mounted on a vehicle on a horizontal road surface. In the drawings, an XYZ coordinate system is appropriately shown as a three-dimensional rectangular coordinate system. In the XYZ coordinate system, the Z-axis direction shows a vertical direction (i.e., the up-down direction), + Z direction is the upper side (the opposite side to the direction of gravity), and-Z direction is the lower side (the direction of gravity). The X-axis direction is a direction perpendicular to the Z-axis direction, and shows the front-rear direction of the vehicle on which the motor unit 1 is mounted, + X direction is the vehicle front direction, and-X direction is the vehicle rear direction. However, the + X direction may be the vehicle rear direction and the-X direction may be the vehicle front direction. The Y-axis direction is a direction perpendicular to both the X-axis direction and the Z-axis direction, and shows the width direction (left-right direction) of the vehicle, + Y direction is the left side of the vehicle, and-Y direction is the right side of the vehicle. However, when the + X direction is the rear of the vehicle, the + Y direction may be the right side of the vehicle and the-Y direction may be the left side of the vehicle. That is, regardless of the direction of the X-axis, only the + Y direction is one side of the vehicle left-right direction, and the-Y direction is the other side of the vehicle left-right direction.

In the following description, unless otherwise specified, a direction (Y-axis direction) parallel to the motor axis J2 of the motor 2 is simply referred to as "axial direction", a radial direction about the motor axis J2 is simply referred to as "radial direction", and a circumferential direction about the motor axis J2 (i.e., a direction around the motor axis J2) is simply referred to as "circumferential direction". However, the "parallel direction" also includes a substantially parallel direction.

Hereinafter, a motor unit (electric drive device) 1 according to an exemplary embodiment of the present invention will be described with reference to the drawings.

Fig. 1 is a conceptual diagram of a motor unit 1 according to an embodiment. Fig. 2 is a perspective view of the motor unit 1. Fig. 1 is a conceptual diagram, and the arrangement and size of each portion are not necessarily the same as those of the actual portion.

The motor unit 1 is mounted on a vehicle having a motor as a power source, such as a Hybrid Electric Vehicle (HEV), a plug-in hybrid electric vehicle (PHV), or an Electric Vehicle (EV), and is used as a power source of the vehicle.

As shown in fig. 1, the motor unit 1 includes a motor (main motor) 2, a gear portion 3, a housing 6, oil O contained in the housing 6, an inverter unit (control portion) 8, and a parking mechanism 7.

As shown in fig. 1, the motor 2 includes: a rotor 20 that rotates about a motor axis J2 extending in the horizontal direction; and a stator 30 located radially outside the rotor 20. The housing 6 is provided with a housing space 80 for housing the motor 2 and the gear portion 3. The housing space 80 is divided into a motor chamber 81 housing the motor 2 and a gear chamber 82 housing the gear portion 3.

< Motor >

The motor 2 is housed in a motor chamber 81 of the housing 6. The motor 2 includes a rotor 20, a stator 30 located radially outside the rotor 20, and a rotation angle sensor 9 that detects a rotation angle of the rotor 20. The motor 2 is an inner rotor type motor having a stator 30 and a rotor 20 rotatably disposed inside the stator 30.

The rotor 20 is rotated by supplying electric power to the stator 30 from a battery, not shown. The rotor 20 includes a shaft (motor shaft) 21, a rotor core 24, and a rotor magnet (not shown). The rotor 20 (i.e., the shaft 21, the rotor core 24, and the rotor magnet) rotates about a motor axis J2 extending in the horizontal direction. The torque of the rotor 20 is transmitted to the gear portion 3.

The shaft 21 extends centering on a motor axis J2 extending in the width direction of the vehicle in the horizontal direction. The shaft 21 rotates about a motor axis J2. The shaft 21 is a hollow shaft provided with a hollow portion 22, and the hollow portion 22 has an inner peripheral surface extending along the motor axis J2 therein.

The shaft 21 extends across a motor chamber 81 and a gear chamber 82 of the housing 6. One end of the shaft 21 protrudes toward the gear chamber 82 side. The 1 st gear 41 is fixed to an end of the shaft 21 projecting into the gear chamber 82.

The rotor core 24 is formed by laminating silicon steel plates. The rotor core 24 is a cylindrical body extending in the axial direction. A plurality of rotor magnets, not shown, are fixed to the rotor core 24. The plurality of rotor magnets are arranged in the circumferential direction such that the magnetic poles alternate.

The stator 30 surrounds the rotor 20 from the radially outer side. The stator 30 includes a stator core 32, a coil 31, and an insulator (not shown) interposed between the stator core 32 and the coil 31. The stator 30 is held by the housing 6. The stator core 32 has a plurality of magnetic pole teeth (not shown) extending radially inward from the inner circumferential surface of the annular yoke. The coil wire is wound between the magnetic pole teeth. The coil wire wound around the magnetic pole teeth constitutes the coil 31. The coil wire is connected to the inverter unit 8 via a bus bar, not shown. The coil 31 has a coil end 31a protruding from an axial end face of the stator core 32. The coil end 31a protrudes in the axial direction from the end of the rotor core 24 of the rotor 20. The coil end 31a protrudes to both axial sides with respect to the rotor core 24.

The rotation angle sensor 9 detects the rotation angle of the rotor 20. In the present embodiment, the rotation angle sensor 9 is, for example, a vr (variable recovery) type resolver. The rotation angle sensor 9 includes a resolver rotor (not shown) fixed to the shaft 21 and a resolver stator (not shown) fixed to the housing 6 and surrounding the resolver rotor from the outside in the radial direction. The rotation angle sensor 9 is connected to the inverter unit 8 via a signal line 11 (see fig. 4). The rotation angle sensor 9 transmits information of the rotation angle of the rotor 20 to the inverter unit 8 via the signal line 11.

< gear part >

The gear portion 3 is housed in a gear chamber 82 of the housing 6. The gear portion 3 is connected to the shaft 21 on one axial side of the motor axis J2. The gear portion 3 has a reduction gear 4 and a differential gear 5. The torque output from the motor 2 is transmitted to the differential device 5 via the reduction gear 4.

< reduction gear >

The reduction gear 4 is connected to the rotor 20 of the motor 2. The reduction gear 4 reduces the rotation speed of the motor 2, and has a function of increasing the torque output from the motor 2 according to the reduction ratio. The reduction gear 4 transmits the torque output from the motor 2 to the differential device 5.

The reduction gear unit 4 has a 1 st gear (intermediate drive gear) 41, a 2 nd gear (intermediate gear) 42, a 3 rd gear (final drive gear) 43, and an intermediate shaft 45. The torque output from the motor 2 is transmitted to the ring gear 51 (gear) of the differential device 5 via the motor 2 shaft 21, the 1 st gear 41, the 2 nd gear 42, the counter shaft 45, and the 3 rd gear 43. The gear ratio of each gear, the number of gears, and the like can be variously changed according to the required reduction ratio. The reduction gear 4 is a parallel-axis gear type reduction gear in which the axes of the gears are arranged in parallel.

The 1 st gear 41 is provided on the outer peripheral surface of the shaft 21 of the motor 2. The 1 st gear 41 rotates together with the shaft 21 about the motor axis J2. The intermediate shaft 45 extends along an intermediate axis J4 that is parallel to the motor axis J2. The intermediate shaft 45 rotates about the intermediate axis J4. The 2 nd gear 42 and the 3 rd gear 43 are provided on the outer peripheral surface of the intermediate shaft 45. The 2 nd gear 42 and the 3 rd gear 43 are connected via an intermediate shaft 45. The 2 nd gear 42 and the 3 rd gear 43 rotate about the intermediate axis J4. The 2 nd gear 42 meshes with the 1 st gear 41. The 3 rd gear 43 meshes with the ring gear 51 of the differential device 5. The 3 rd gear 43 is located on the partition wall 61c side with respect to the 2 nd gear 42.

< differential device >

The differential device 5 is connected to the motor 2 via the reduction gear 4. The differential device 5 is a device for transmitting the torque output from the motor 2 to the wheels of the vehicle. The differential device 5 has a function of absorbing a speed difference between the left and right wheels and transmitting the same torque to the axles 55 of the left and right wheels when the vehicle turns. The differential device 5 has a ring gear 51, a gear housing (not shown), a pair of pinion gears (not shown), a pinion shaft (not shown), and a pair of side gears (not shown).

The ring gear 51 rotates about a differential axis J5 parallel to the motor axis J2. The torque output from the motor 2 is transmitted to the ring gear 51 via the reduction gear 4. That is, the ring gear 51 is connected to the motor 2 via another gear.

< parking mechanism >

In the electric vehicle, since there is no brake mechanism for applying a brake to the vehicle other than the side brake, the parking mechanism 7 is required in the motor unit 1.

As shown in fig. 1, the parking mechanism 7 includes: a parking gear 71 fixed to the intermediate shaft 45 and rotating about an intermediate axis J4 together with the intermediate shaft 45; a rotation preventing portion 72 that moves between the teeth of the parking gear 71 and prevents rotation of the parking gear 71; and a parking motor 73 that drives the rotation blocking portion 72. When the motor 2 is operated, the rotation preventing portion 72 is retracted from the parking gear 71. On the other hand, when the shift lever is in the parking position, the parking motor 73 moves the rotation preventing portion 72 into the tooth space of the parking gear 71, and prevents the parking gear 71 from rotating.

< outer case >

As shown in fig. 1, the motor 2 and the gear portion 3 are housed in a housing space 80 provided inside the housing 6. The housing 6 holds the motor 2 and the gear portion 3 in the housing space 80. The housing 6 has a partition wall 61 c. The housing space 80 of the housing 6 is partitioned by a partition wall 61c into a motor chamber 81 and a gear chamber 82. The motor chamber 81 houses the motor 2. The gear chamber 82 houses the gear portion 3 (i.e., the reduction gear 4 and the differential gear 5).

An oil reservoir P in which the oil supply O is stored is provided in a lower region in the housing space 80. In the present embodiment, the bottom 81a of the motor chamber 81 is located above the bottom 82a of the gear chamber 82. A partition wall 61c that partitions the motor chamber 81 and the gear chamber 82 is provided with a partition wall opening 68. The partition wall opening 68 communicates the motor chamber 81 with the gear chamber 82. The partition wall opening 68 moves the oil O accumulated in the lower region of the motor chamber 81 to the gear chamber 82.

As shown in fig. 2, the housing 6 includes a 1 st housing part 61, a 2 nd housing part 62, a 3 rd housing part 63, and a cover part 64. The 2 nd housing part 62 is located on one axial side of the 1 st housing part 61. The 3 rd housing part 63 and the cover part 64 are located on the other axial side of the 1 st housing part 61.

Fig. 3 is an exploded view of the housing 6.

The 1 st housing part 61 has: a cylindrical peripheral wall portion 61a surrounding the motor 2 from the outside in the radial direction; and a side plate portion 61b located on one axial side of the peripheral wall portion 61 a. The space inside the peripheral wall portion 61a constitutes a motor chamber 81. The side plate portion 61b includes a partition wall 61c and a protruding plate portion 61 d. The partition wall 61c covers the opening of the circumferential wall 61a on one axial side. The partition wall 61c is provided with a through-insertion hole 61f through which the shaft 21 of the motor 2 is inserted, in addition to the partition wall opening 68 described above. The side plate portion 61b includes a partition wall 61c and a protruding plate portion 61d that protrudes outward in the wire diameter direction with respect to the peripheral wall portion 61 a. The projecting plate portion 61d is provided with a 1 st axle passage hole 61e through which a drive shaft (not shown) that supports a wheel passes.

The 3 rd housing part 63 is fixed to the peripheral wall portion 61a of the 1 st housing part 61. The 3 rd housing part 63 closes the opening of the 1 st housing part 61 in a cylindrical shape. The 3 rd housing member 63 is provided with a window portion 63c penetrating in the axial direction.

The 1 st case member 61 and the 3 rd case member 63 constitute a case main body 69 that houses the motor 2. Namely, the housing 6 has a housing main body 69. A motor chamber 81 is provided inside the housing main body 69. The housing main body 69 is provided with a window 63 c. The window 63c extends through the housing body 69.

The cover member 64 is plate-shaped. The cover member 64 is manufactured by press working. The cover member 64 is fixed to the 3 rd housing member 63. The cover member 64 covers the window portion 63c from the outside of the housing main body 69.

The 2 nd housing member 62 is fixed to the side plate portion 61b of the 1 st housing member 61. The shape of the 2 nd housing member 62 is a concave shape that opens to the side plate portion 61b side. The opening of the 2 nd housing member 62 is covered with the side plate portion 61 b. The space between the 2 nd housing member 62 and the side plate portion 61b constitutes a gear chamber 82 in which the gear portion 3 is housed. The 2 nd housing part 62 is provided with a 2 nd axle passage hole 62 e. The 2 nd axle passage hole 62e overlaps the 1 st axle passage hole 61e as viewed in the axial direction.

< oil >)

As shown in fig. 1, the oil O circulates in an oil passage 90 provided in the casing 6. The oil passage 90 is a path of the oil O that supplies the oil O from the oil reservoir P to the motor 2. The oil passage 90 circulates the oil O to cool the motor 2.

The oil O is used for lubrication of the reduction gear 4 and the differential 5. In addition, the oil O is used for cooling the motor 2. The oil O is accumulated in a lower region (i.e., the oil reservoir P) in the gear chamber 82. As the oil O, it is preferable to use an oil equivalent to an Automatic Transmission lubricating oil (ATF) having a relatively low viscosity so as to realize the functions of a lubricating oil and a cooling oil.

< oil passage >

As shown in fig. 1, an oil passage 90 is provided in the housing 6. The oil passage 90 is located in the housing space 80 in the housing 6. The oil passage 90 is configured to span the motor chamber 81 and the gear chamber 82 of the housing space 80. The oil passage 90 is a path of the oil O that passes through the motor 2 from the oil reservoir P on the lower side of the motor 2 (i.e., the lower region in the housing space 80) and is guided again to the oil reservoir P on the lower side of the motor 2.

In the present specification, the "oil passage" refers to a path of the oil O circulating in the housing space 80. Thus, "oil passage" is a concept as follows: the "flow path" for stably flowing the oil in one direction at all times is not limited to the formation, and a path (for example, a reserve tank) for temporarily retaining the oil and a path for dropping the oil are also included.

The oil passage 90 has a 1 st oil passage 91 that passes through the inside of the motor 2; and a 2 nd oil passage 92 passing through the outside of the motor 2. The oil O cools the motor 2 from the inside and the outside in the 1 st oil passage 91 and the 2 nd oil passage 92.

(1 st oil path)

As shown in fig. 1, in the 1 st oil passage 91, the oil O is lifted from the oil reservoir P by the differential device 5, temporarily accumulated in the 1 st reserve tank 93, and then introduced into the rotor 20. Inside the rotor 20, a centrifugal force based on the rotation of the rotor 20 is applied to the oil O. Thereby, the oil O is uniformly diffused toward the stator 30 surrounding the rotor 20 from the radial outside, and cools the stator 30.

The oil O that has reached the stator 30 takes heat from the stator 30. The oil O that has cooled the stator 30 drops downward and is accumulated in the lower region in the motor chamber 81. The oil O accumulated in the lower region of the motor chamber 81 moves to the gear chamber 82 through the partition wall opening 68 provided in the partition wall 61 c.

(2 nd oil path)

As shown in fig. 1, in the 2 nd oil passage 92, the oil O is lifted up from the oil reservoir P to the upper side of the motor 2 and supplied to the motor 2. The oil O supplied to the motor 2 is transferred to the outer peripheral surface of the stator 30, and takes heat from the stator 30 to cool the motor 2. The oil O transferred to the outer peripheral surface of the stator 30 drops downward and is accumulated in the lower region in the motor chamber 81. The oil O in the 2 nd oil passage 92 and the oil O in the 1 st oil passage 91 merge in a lower region in the motor chamber 81. The oil O accumulated in the lower region of the motor chamber 81 moves to the lower region (i.e., the oil reservoir P) of the gear chamber 82 via the partition wall opening 68.

A pump 96 is provided in 2 nd oil passage 92. Pump 96 circulates oil O in 2 nd oil passage 92. The pump 96 is an electric pump driven electrically. The pump 96 is provided on the outer peripheral surface of the housing 6. The pump 96 has a pump motor 96 m. The pump 96 sucks up the oil O from the oil reservoir P through the 1 st passage 92a, and supplies the oil O to the motor 2 through the 2 nd passage 92b, the cooler 97, the 3 rd passage 92c, and the 2 nd reservoir 98.

Cooler 97 is provided in 2 nd oil passage 92. Cooler 97 cools oil O in 2 nd oil path 92. The cooler 97 is provided on the outer peripheral surface of the housing 6. A cooling water pipe 97j through which cooling water cooled by a radiator (not shown) passes is connected to the cooler 97. The oil O passing through the cooler 97 and the cooling water passing through the cooling water pipe 97j are cooled by heat exchange. Further, an inverter unit 8 is provided in a path of the cooling water pipe 97 j. The cooling water passing through the cooling water pipe 97j cools the inverter unit 8.

A 2 nd reservoir tank 98 is provided in the 2 nd oil passage 92. The 2 nd storage tank 98 is located in the motor chamber 81 of the storage space 80. The 2 nd reservoir tank 98 temporarily stores the oil lifted up from the oil reservoir P by the pump 96 to the upper side of the motor 2. The 2 nd storage tank 98 is located at the upper side of the motor. The 2 nd storage tank 98 has a plurality of outflow ports 98 a. The oil O accumulated in the 2 nd reservoir 98 is supplied to the motor 2 through the respective outflow ports 98 a. The oil O flowing out of the outflow port 98a of the 2 nd reserve tank 98 flows along the outer peripheral surface of the motor 2 from the upper side toward the lower side, and takes heat from the motor 2. This enables the entire motor 2 to be cooled.

The oil O that has cooled the coil 31 drips downward and accumulates in the lower region in the motor chamber 81. The oil O accumulated in the lower region of the motor chamber 81 moves to the gear chamber 82 through the partition wall opening 68 provided in the partition wall 61 c.

< inverter unit (control part) >

Fig. 4 is a side view of the motor unit 1. The inverter unit 8 is fixed to an outer peripheral surface of the casing 6 facing radially outward. The inverter unit 8 is electrically connected to the motor 2 via a bus bar, not shown. The bus bar unit 8 controls the rotation of the motor 2.

As shown in fig. 4, the motor unit 1 includes a plurality of flexible linear members (signal lines 11, power lines 12, and hoses 13) extending along the outer peripheral surface of the housing 6.

The signal line 11 connects the rotation angle sensor 9 and the inverter unit 8. The signal line 11 is an example of a flexible linear member. The signal line 11 transmits the detection result of the rotation angle sensor 9 to the inverter unit 8. The inverter unit 8 controls the current supplied to the motor 2 based on the rotation angle of the rotor 20 detected by the rotation angle sensor 9.

The power supply line 12 connects the inverter unit 8 and the pump 96. The power supply line 12 is an example of a flexible linear member. The power supply line 12 supplies electric power from the inverter unit 8 to the pump 96. More specifically, the inverter unit 8 supplies electric power to a pump motor 96m (see fig. 1) of the pump 96, and controls driving of the pump 96. The signal wire 11 and the power wire 12 are bundled by the 1 st bundling band 66.

The hose 13 connects the cooler 97 and the inverter unit 8. The hose 13 is an example of a flexible linear member. A refrigerant (cooling water) flows through the hose 13, and cools the oil O passing through the cooler 97 and the inverter unit 8. The hose 13 is a part of the cooling water pipe 97 j. As shown in fig. 1, the cooling water pipe 97j has a pipe that passes from the radiator (not shown) through the inverter unit 8 and the cooler 97 and returns to the radiator. The coolant pipe 97j cools the oil O in the inverter unit 8 and the cooler 97 by the coolant flowing inside. The hose 13 corresponds to a pipe from the inverter unit 8 of the cooling water pipe 97j to the cooler 97.

As shown in fig. 4, the inverter unit 8 has an opposing surface 8f opposing the outer peripheral surface of the housing 6 and a connection surface 8a perpendicular to the opposing surface 8 f. The connection surface 8a extends along a plane perpendicular to the axial direction.

On the connection surface 8a, a 1 st terminal connection portion 8b to which the signal line 11 is connected, a 2 nd terminal connection portion 8c to which the power line 12 is connected, and a hose connection portion 8d to which the hose 13 is connected are arranged.

The 1 st terminal connecting portion 8b and the 2 nd terminal connecting portion 8c are arranged along the ridge of the connecting surface 8a and the opposing surface 8 f. That is, the 1 st terminal connecting portion 8b and the 2 nd terminal connecting portion 8c are arranged along the outer peripheral surface of the housing 6 on the connection surface 8 a. According to the present embodiment, the signal line 11 and the power supply line 12 can be extended close to each other in the vicinity of the inverter unit 8. Therefore, the signal line 11 and the power line 12 can be bundled by the 1 st bundling band 66. As a result, jitter of the signal line 11 and the power supply line 12 can be suppressed.

The hose connection portion 8d of the present embodiment is not disposed along the outer peripheral surface of the housing 6. However, the hose connection portion 8d may be arranged along the outer peripheral surface of the housing 6 together with the 1 st terminal connection portion 8b and the 2 nd terminal connection portion 8 c. At this time, the 1 st binding band 66 can bind the hose 13 together with the signal line 11 and the power line 12.

As shown in fig. 4, a plurality of 2 nd bundling bands (bundling bands, holding portions) 65 for holding the signal line 11, the power line 12, and the hose 13 are provided on the lid member 64 of the housing 6.

The lid member 64 is provided with a plurality of projections 64a projecting radially outward from the peripheral edge of the lid member 64. The plurality of projections 64a are provided with through holes 64b that penetrate in the axial direction. That is, the cover member 64 is provided with a plurality of through holes 64 b. The 2 nd bundling tapes 65 are inserted through the through holes 64 b. The 2 nd bundling tapes 65 are respectively passed through the through holes 64b and wound around at least one of the signal line 11, the power line 12, and the hose 13. Thereby, the 2 nd binding band 65 fixes the signal line 11, the power line 12, and the hose 13 to the cover member 64.

In the present embodiment, the number of the protruding portion 64a, the through hole 64b, and the 2 nd bundling band 65 is four. In the present embodiment, 2 of the 42 nd bundling bands 65, the 2 nd bundling band 65 bundles and holds the power supply line 12 and the hose 13. The power supply line 12 and the hose 13 extend from the connection surface 8a of the inverter unit 8 toward the lower side of the motor 2. The power supply line 12 and the hose 13 extend along a common path along the peripheral edge of the cover member 64. The power cord 12 and the hose 13 are bound and held by the 2 nd binding band 65 at a portion extending along the peripheral edge of the cover member 64. Therefore, the number of the 2 nd binding tapes 65 can be reduced, and the time required for the step of fixing the 2 nd binding tapes 65 can be shortened.

On the other hand, the signal line 11 is connected to the upper surface of the housing 6. Therefore, the signal line 11 has a small area extending in a common path with the power supply line 12 and the hose 13. The signal wires 11 are individually fixed to the cover member 64 by the 2 nd bundling band 65 positioned at the uppermost side among the plurality of 2 nd bundling bands 65.

In the present embodiment, the signal line 11 and the power line 12 are bundled by the 1 st bundling band 66. However, the signal line 11 and the power line 12 may be bundled and fixed by the 2 nd bundling band 65 by adjusting the extension of the signal line 11 and the power line 12.

According to the present embodiment, the 2 nd bundling band (holding portion) 65 that holds the linear member (at least one of the signal line 11, the power line 12, and the hose 13) is provided on the plate-like cover member 64. The cover member 64 is plate-shaped, and therefore, is easy to process. More specifically, by manufacturing the cover member 64 by press working, the through hole 64b through which the 2 nd bundling band 65 is inserted can be easily provided without increasing the number of manufacturing steps. Therefore, according to the motor unit 1 of the present embodiment, it is possible to hold the linear member with a simple structure and suppress the vibration of the linear member.

< modification of cover member >)

Fig. 5 is a side view of the motor unit 101 having a modified cover member 164. The lid member 164 of the present modification is different from the above-described embodiment mainly in the structure of the holding portion 165. The same reference numerals are given to the same constituent elements as those of the above embodiment, and the description thereof will be omitted.

The cover member 164 is provided with a plurality of holding portions 165 for holding linear members (at least one of the signal line 11, the power line 12, and the hose 13).

In the present modification, the cover member 164 and the holding portion 165 are one member. The cover member 164 and the holding portion 165 are plate-shaped. The cover member 164 and the holder 165 are made of a metal material. The cover member 164 and the holder 165 are manufactured by press working.

The holding portion 165 protrudes radially outward from the peripheral edge of the cover member 164. The holding portion 165 extends in a rectangular shape radially outward. The holding portion 165 is bent rearward in the drawing sheet of fig. 5. Thereby, the holding portion 165 is wound around the linear member (at least one of the signal line 11, the power line 12, and the hose 13).

The step of winding the holding portion 165 around the linear member is performed by an operator who performs the assembling step. In the assembly step, the worker arranges the linear member along the peripheral edge of the cover member 164. At this stage, the holding portion 165 linearly extends along a plane perpendicular to the radial direction. Next, the operator bends the holding portion 165 so that the holding portion 165 is wound around the linear member. Through the above steps, the linear member can be held by the cover member 164.

According to the present embodiment, the plate-shaped cover member 164 is provided with the holding portion 165 for holding the linear member (at least one of the signal line 11, the power line 12, and the hose 13). Since the holding portion 165 has a plate shape, it is easy to process. Therefore, the linear member can be fixed to the cover member 164 by bending the holding portion 165 without increasing the number of components. That is, according to the motor unit 101 of the present embodiment, it is possible to hold the linear member with a simple structure and suppress the vibration of the linear member.

While the embodiments and the modifications of the present invention have been described above, the configurations of the embodiments and combinations thereof are examples, and additions, omissions, substitutions, and other modifications of the configurations can be made without departing from the spirit of the present invention. In addition, the present invention is not limited to the embodiments.

Description of the reference symbols

1. 101: a motor unit; 2: a motor; 6: a housing; 8: an inverter unit (control unit); 8 a: a connecting surface; 8 b: 1 st terminal connection part; 8 c: a 2 nd terminal connecting portion; 9: a rotation angle sensor; 11: a signal line; 12: a power line; 13: a hose; 20: a rotor; 63 c: a window portion; 64. 164: a cover member; 64 b: a through hole; 65: 2 nd binding band (binding band, holding part); 69: a housing main body; 90: an oil path; 96: a pump; 97: a cooler; 165: a holding section; j2: a motor shaft; o: and (3) oil.

Claims

1. A motor unit having:

a motor having a rotor that rotates about a motor axis;

a housing that houses the motor; and

a flexible linear member extending along an outer peripheral surface of the housing,

the housing has a housing main body for housing the motor and a plate-like cover member,

the housing main body is provided with a window portion,

the cover member covers the window portion from the outside of the housing main body,

the cover member is provided with a holding portion that holds the linear member.

2. The motor unit according to claim 1,

the cover member is provided with a through hole penetrating in the thickness direction,

the holding portion is a binding band that is wound around the linear member through the through hole.

3. The motor unit according to claim 1,

the cover member and the holding portion are one member,

the holding portion extends from a peripheral edge of the cover member and is wound around the linear member to hold the linear member.

4. The motor unit according to any one of claims 1 to 3,

the motor unit has a control part fixed on the outer peripheral surface of the shell and used for controlling the rotation of the motor,

the motor has a rotation angle sensor that detects a rotation angle of the rotor,

the linear member is a signal line that connects the rotation angle sensor and the control unit and transmits a detection result of the rotation angle sensor to the control unit.

5. The motor unit according to claim 4,

the motor unit is provided with a plurality of the linear members,

the housing is provided with an oil passage for circulating oil to cool the motor,

a pump for circulating the oil in the oil passage is provided on an outer peripheral surface of the housing,

at least one of the linear members is a power supply line that connects the control unit and the pump and supplies power from the control unit to the pump.

6. The motor unit according to claim 5,

the control portion has a connection surface provided with a 1 st terminal connection portion for connecting the signal line and a 2 nd terminal connection portion for connecting the power line,

the 1 st terminal connection portion and the 2 nd terminal connection portion are arranged along an outer peripheral surface of the housing on the connection face.

7. The motor unit according to any one of claims 4 to 6,

the motor unit is provided with a plurality of the linear members,

a cooler for cooling the oil in the oil passage is provided on an outer peripheral surface of the housing,

at least one of the linear members is a hose that connects the cooler and the control unit and through which a refrigerant flows, and the refrigerant cools the oil that has passed through the cooler and the control unit.

8. The motor unit according to any one of claims 5 to 7,

the holding portion bundles and holds the plurality of linear members.