Drive device

Abstract

According to one mode of the utility model, the driving equipment is provided with a motor which is provided with a rotor which can rotate by taking the axis of the motor as the center; a power transmission mechanism connected to the rotor and transmitting rotation of the rotor; a housing having a first housing part for housing the motor and a second housing part for housing the power transmission mechanism; and the heating equipment is fixed on the outer side surface of the shell.

Description

Technical Field

[0001] The utility model relates to a driving device. Background Art

[0002] Generally, heating devices such as PTC heaters are sometimes used in air conditioning systems for vehicles. Conventionally, a structure is known in which an electrically operated heater generates heat to heat the cooling water in the cooling water circulation circuit that heats the fuel cell (for example, Patent Document 1).

[0003] [Prior art literature]

[0004] [Patent Document]

[0005] Patent Document 1: Japanese Patent Application Laid-Open No. 2010-284045 Utility Model Content

[0006] Electric and hybrid vehicles are also equipped with heating equipment, such as heating the vehicle's battery and air conditioning systems, for example. However, the space available for the drive system within the vehicle is limited, and depending on the placement of the heating equipment, there is a risk of interference between the heating and drive systems. Therefore, it is necessary to prevent interference between the heating and drive systems within the limited space within the vehicle.

[0007] In view of the above situation, one of the objectives of the present invention is to provide a driving device that can appropriately configure a heating device.

[0008] One embodiment of a driving device of the present invention comprises: a motor having a rotor capable of rotating about a motor axis; a power transmission mechanism connected to the rotor to transmit the rotation of the rotor; a housing having a first housing portion for accommodating the motor and a second housing portion for accommodating the power transmission mechanism; and a heating device fixed to the outer side surface of the housing.

[0009] According to one aspect of the present invention, one of its objectives is to provide a driving device capable of appropriately configuring a heating device. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a conceptual diagram of a driving device according to one embodiment.

[0011] Figure 2 This is a perspective view of a driving device according to one embodiment.

[0012] Figure 3 This is a front view of a driving device according to one embodiment.

[0013] Figure 4 This is a front view of the drive device of Modification 1.

[0014] Figure 5 This is a front view of the drive device of Modification 2.

[0015] Figure 6 This is a front view of the drive device of Modification 3.

[0016] Figure 7 It is a top view of the drive device of Modification 4.

[0017] Figure 8 It is a top view of the drive device of Modification 5.

[0018] Figure 9 It is a top view of the driving device of Modification Example 6.

[0019] Figure 10 It is a side view of the drive device of Modification 7.

[0020] Figure 11 It is a side view of the drive device of Modification 8.

[0021] Figure 12 It is a side view of the drive device of Modification 9.

[0022] Figure 13 It is a side view of the drive device of Modification 10.

[0023] (Explanation of Symbols)

[0024] 1. 101. 201. 301. 401. 501. 601. 701. 801. 901. 1001. Driving device; 2. Motor; 3. Power transmission mechanism; 5. Differential device; 6. 1006. Housing; 6d. First peripheral wall portion (peripheral wall portion); 6m. Recessed portion; 6A. First storage portion; 6B. Second storage portion; 6C. 606C. Third storage portion; 7. 7a. 7b. 607. Control portion; 10. 110. 210. 310. 410. 510. 610. 710. 810. 910. Heating device; 20. Rotor; 61f. First flange portion (flange portion); B. Battery (external device); J1. Motor axis; J3. Differential axis; P. Pipeline; X-reference direction; Y-axial direction; Z-upper and lower directions DETAILED DESCRIPTION

[0025] The following describes the drive device according to the embodiment with reference to the accompanying drawings. The following description is based on the positional relationship when the drive device is installed in a vehicle on a horizontal road, with the direction of gravity being defined. Furthermore, X, Y, and Z coordinates are shown as appropriate in each figure. The Z axis represents the vertical direction, with the +Z side representing the upper side and the -Z side representing the lower side. The Y axis represents the left-right direction of the vehicle on which the drive device is installed. The X axis represents the front-back direction of the vehicle on which the drive device is installed.

[0026] In the following description, unless otherwise specified, the direction parallel to the motor axis J1 of the motor 2 (the Y-axis direction) is referred to simply as the "axial direction Y," the radial direction centered on the motor axis J1 is referred to simply as the "radial direction," and the circumferential direction centered on the motor axis J1, i.e., the direction around the motor axis J1, is referred to simply as the "circumferential direction." Furthermore, the vehicle's front-to-back direction (i.e., the direction parallel to the X-axis) is referred to as the reference direction X. The reference direction X is a direction orthogonal to both the axial direction Y and the vertical direction Z.

[0027] In the following description, the axial direction side refers to the direction opposite to the direction indicated by the Y-axis arrow in the drawings (the -Y side), and the axial direction side refers to the direction indicated by the Y-axis arrow in the drawings (the +Y side). The reference direction side refers to the direction indicated by the X-axis arrow in the drawings (the +X side), and the reference direction side refers to the direction opposite to the direction indicated by the arrow in the drawings (the -X side).

[0028] <Drive equipment>

[0029] Figure 1 It is a conceptual diagram of the driving device 1 according to the embodiment. Figure 2 It is a perspective view of the driving device 1 according to the embodiment. Figure 3 This is a front view of the drive device 1 according to the embodiment as viewed from one axial side (-Y side).

[0030] The drive device 1 of the present embodiment is mounted on a vehicle such as a hybrid electric vehicle (HEV), a plug-in hybrid electric vehicle (PHV), or an electric vehicle (EV) that uses a motor 2 as a power source, and is used as the power source.

[0031] like Figure 1 As shown, the drive device 1 includes a motor 2, a power transmission mechanism 3, a housing 6, a control unit 7, and a heating device 10. The housing 6 houses the motor 2, the power transmission mechanism 3, and the control unit 7. Furthermore, in this embodiment, a fluid O, such as oil, is stored within the housing 6. The heating device 10 is fixed to the outer surface of the housing 6. The housing 6 may be provided with a flow path for circulating the fluid O. In this case, a pump for pressurizing the fluid O and a cooler for cooling the fluid O may also be provided on the outer surface of the housing 6 or within the housing 6.

[0032] Motor

[0033] The motor 2 in this embodiment is, for example, an inner rotor type three-phase AC motor. Motor 2 has both the function of outputting power as a motor and the function of generating electricity as a generator. Motor 2 can function as either a motor or a generator. The structure of motor 2 is not limited to this embodiment; for example, a four-phase or higher AC motor may also be used.

[0034] The motor 2 includes a rotor 20 rotatable about a motor axis J1 extending in the horizontal direction, and a stator 25 located radially outside the rotor 20 .

[0035] <Stator>

[0036] The stator 25 is held in the housing 6. The stator 25 surrounds the rotor 20 from the radial outside. The stator 25 includes an annular stator core 27 centered on the motor axis J1; coils 26 mounted on the stator core 27; and an insulator (not shown) interposed between the stator core 27 and the coils 26. The stator core 27 includes an annular core back and a plurality of teeth extending radially inward from the core back and arranged circumferentially. Multiple coil wires constituting the coils 26 are arranged between the teeth.

[0037] In this specification, the term "annular" refers to a shape consisting of a series of loops or a C-shape or the like based thereon, and is not necessarily limited to a circular ring shape.

[0038] <Rotor>

[0039] The rotor 20 includes a shaft 21, a rotor core 24 fixed to the outer circumference of the shaft 21, and a plurality of magnets (not shown) fixed to the rotor core 24. The shaft 21 extends along the motor axis J1. The shaft 21 is supported by the housing 6 so as to be rotatable about the motor axis J1. The rotor core 24 is fixed to the outer circumference of the shaft 21. The rotor core 24 is in the shape of a column extending along the motor axis J1. The rotor core 24 is provided with a through hole through which the shaft 21 passes. The rotor core 24 is provided with a retaining hole (not shown) that penetrates, for example, in the axial direction Y, and the magnets are housed in the retaining hole.

[0040] Power transmission mechanism

[0041] The power transmission mechanism 3 is located on the other axial side (+Y side) of the motor 2. The power transmission mechanism 3 is connected to the rotor 20, transmitting the rotation of the rotor 20 and outputting it through the output shaft 55. The power transmission mechanism 3 includes a first shaft 44, a second shaft 45, a first gear 41, a second gear 42, a third gear 43, and a differential device 5. The differential device 5 includes a ring gear 51 and a pair of output shafts 55. Wheels (not shown) are mounted to the front ends of the pair of output shafts 55.

[0042] The first shaft 44 extends along the axial direction Y, centered about the motor axis J1. The end of the first shaft 44 on one axial side (the -Y side) is connected to the end of the shaft 21 on the other axial side (the +Y side). Thus, the first shaft 44 is connected to the rotor 20 of the motor 2 and rotates together with the rotor 20. The first gear 41 is disposed on the outer circumference of the first shaft 44. The first gear 41 rotates about the motor axis J1. The second shaft 45 is rotatable about an intermediate axis J2, which is parallel to the motor axis J1. The second gear 42 and the third gear 43 are disposed on the outer circumference of the second shaft 45. The second gear 42 and the third gear 43 rotate about the intermediate axis J2. The second gear 42 meshes with the first gear 41. The third gear 43 meshes with the ring gear 51 of the differential device 5. The differential device 5 is rotatable about a differential axis J3, which is parallel to the motor axis J1. The differential device 5 absorbs the speed difference between the left and right wheels when the vehicle turns and transmits the torque transmitted from the third gear 43 to the output shaft 55. The torque output from the motor 2 is transmitted to the ring gear 51 of the differential device 5 via the first shaft 44, the first gear 41, the second gear 42, the second shaft 45, and the third gear 43. The torque is then output to the pair of output shafts 55 via the differential mechanism of the differential device 5. The pair of output shafts 55 are each rotatable about the differential axis J3.

[0043] The lower end of the ring gear 51 is immersed in the fluid O accumulated in the housing 6. The ring gear 51 lifts the fluid O and supplies it to the tooth surfaces of other gears, thereby improving lubrication between the gears. Alternatively, the gear used to lift the fluid O may be a gear other than the ring gear 51.

[0044] like Figure 3 As shown, when viewing the drive device 1 from the axial direction Y, the motor axis J1, the intermediate axis J2, and the differential axis J3 are aligned along the reference direction X. When viewing the drive device 1 from the axial direction Y, the motor axis J1 is located on one side of the reference direction (the +X side, the vehicle front side) relative to the differential axis J3. That is, in this specification, "one side of the reference direction" refers to the side of the reference direction X where the motor axis J1 is positioned relative to the differential axis J3, and "the other side of the reference direction" refers to the side of the reference direction X where the differential axis J3 is positioned relative to the motor axis J1.

[0045] <Control Department>

[0046] like Figure 1 As shown, the control unit 7 is located radially outward from the motor 2 and axially to one side (-Y side) of the power transmission mechanism 3. The control unit 7 is located above the motor 2. The control unit 7 includes an inverter 7A. The inverter 7A is connected to the battery B and converts the direct current supplied from the battery B into alternating current. Inverter 7A is also connected to the stator 25 and supplies the alternating current to the stator 25.

[0047] In addition to the inverter 7A, the control unit 7 may also include a power integration system 7B. The power integration system 7B includes, for example, an on-board charger (OBC), a power distribution unit (PDU), and a DC / DC converter. The on-board charger is a system for converting the AC voltage supplied via the plug into a DC voltage to charge the battery B. The power distribution unit is a part that distributes the current supplied from the battery B to various electrical components within the vehicle, including the inverter 7A. The DC / DC converter is a part that converts the voltage supplied from the battery B to charge other batteries with lower voltages.

[0048] Furthermore, the control unit 7 is connected to a temperature sensor T provided on the battery B and a heating device 10 . The control unit 7 controls the heating device 10 based on the temperature of the battery B detected by the temperature sensor T.

[0049] <Housing>

[0050] like Figure 1 As shown, the housing 6 includes a housing body 61, a motor cover 63, a gear cover 62, and a control cover 64. The housing body 61, motor cover 63, gear cover 62, and control cover 64 are separate components. The motor cover 63 is located on one axial side (the -Y side) of the housing body 61. The gear cover 62 is located on the other axial side (the +Y side) of the housing body 61. The control cover 64 is located on the upper side of the housing body 61.

[0051] The housing 6 includes a first housing section 6A, a second housing section 6B, and a third housing section 6C. The first housing section 6A houses the motor 2. The second housing section 6B houses the power transmission mechanism 3. The third housing section 6C houses the control unit 7. The first housing section 6A, the second housing section 6B, and the third housing section 6C are composed of a housing body 61, a motor cover 63, a gear cover 62, and a control unit cover 64.

[0052] The first housing section 6A is comprised of a cylindrical portion (the first peripheral wall portion 6d, described later) of the housing body 61 and a motor cover 63 that covers the opening on one axial side (the -Y side) of the cylindrical portion. A first flange portion 61f extending radially outward is provided at the end of the housing body 61 on the one axial side (the -Y side). The first flange portion 61f and the motor cover 63 are fastened together in the axial direction Y using fastening means such as screws. The motor 2 is positioned within the space enclosed by the housing body 61 and the motor cover 63.

[0053] The second housing portion 6B is composed of a concave portion that opens on the other axial side (+Y side) of the housing body 61 and a gear cover 62 that covers the opening of the concave portion. A second flange portion 61k that extends radially outward is provided at the end portion on the other axial side (+Y side) of the housing body 61. In addition, a third flange portion 62k that extends radially outward is provided at the end portion on one axial side (-Y side) of the gear cover 62. The second flange portion 61k and the third flange portion 62k are fastened in the axial direction Y by a fastening unit such as screws. The power transmission mechanism 3 is arranged in a space surrounded by the housing body 61 and the gear cover 62. In addition, in the present embodiment, a fluid O is stored in the internal space of the second housing portion 6B.

[0054] The third storage section 6C is composed of a box-shaped portion (hereinafter referred to as a box-shaped portion 6f) opened on the upper side of the housing body 61 and a control unit cover 64 covering the opening of the box-shaped portion. The control unit 7 is arranged in the space surrounded by the housing body 61 and the control unit cover 64.

[0055] The housing 6 includes a first side wall 6a, a second side wall 6b, a third side wall 6c, a first peripheral wall 6d, a second peripheral wall 6e, a box-shaped portion 6f, and a top wall 6g, as components of the housing body 61, the motor cover 63, the gear cover 62, and the control cover 64. The first side wall 6a, the second side wall 6b, and the third side wall 6c extend along a plane perpendicular to the motor axis J1. The first peripheral wall 6d and the second peripheral wall 6e are generally cylindrical, extending in the axial direction Y. The first peripheral wall 6d connects the second side wall 6b to the first side wall 6a. The second peripheral wall 6e connects the third side wall 6c to the second side wall 6b. The box-shaped portion 6f and the top wall 6g are located above the first peripheral wall 6d.

[0056] The first side wall portion 6a is provided on the motor cover 63. The first side wall portion 6a constitutes a part of the first housing portion 6A. The first side wall portion 6a is located on one side (-Y side) of the motor 2 in the axial direction.

[0057] The second side wall portion 6b is provided on the housing body 61. The second side wall portion 6b is located on the other axial side (+Y side) of the motor 2. The second side wall portion 6b has a partition portion 6p and a projecting portion 6q.

[0058] The dividing portion 6p divides the internal space of the first storage portion 6A from the internal space of the second storage portion 6B. The dividing portion 6p constitutes a portion of the first storage portion 6A and a portion of the second storage portion 6B. The dividing portion 6p is provided with a first hole 61a that passes through the dividing portion 6p in the axial direction Y. The first hole 61a connects the internal space of the first storage portion 6A with the internal space of the second storage portion 6B. In this embodiment, the connecting portion between the shaft 21 and the first shaft 44 is arranged in the first hole 61a. In addition, the connecting portion between the shaft 21 and the first shaft 44 can also be arranged in the internal space of either the first storage portion 6A or the second storage portion 6B.

[0059] The extension portion 6q extends radially outward from the partition portion 6p. The extension portion 6q constitutes a portion of the second housing portion 6B. The extension portion 6q is provided with a second hole 61b extending through the extension portion 6q in the axial direction Y. The output shaft 55 is disposed in the second hole 61b.

[0060] The third side wall portion 6c is provided on the gear cover 62. The third side wall portion 6c constitutes a portion of the second housing portion 6B. The third side wall portion 6c is disposed on the other axial side (+Y side) of the power transmission mechanism 3. A third hole 62a is provided in the third side wall portion 6c, extending through the third side wall portion 6c in the axial direction Y. The output shaft 55 is disposed in the third hole 62a.

[0061] The first circumferential wall portion 6d is provided on the housing body 61. The first circumferential wall portion 6d constitutes a portion of the first housing portion 6A. The first circumferential wall portion 6d surrounds the outer circumference of the motor 2 from the radially outer side of the motor axis J1. For example, the stator core 27 is fixed to the inner circumferential surface of the first circumferential wall portion 6d. A first flange portion 61f is provided at one axial end portion (the -Y side) of the first circumferential wall portion 6d, protruding radially outward from the first circumferential wall portion 6d.

[0062] The second circumferential wall portion 6e is composed of a portion of the housing body 61 and a portion of the gear cover 62. The second circumferential wall portion 6e constitutes a portion of the second housing portion 6B. The second circumferential wall portion 6e surrounds the power transmission mechanism 3 from the radial outside. More specifically, the second circumferential wall portion 6e surrounds the gears 41, 42, 43, and 51 from the radial outside of the motor axis J1, the intermediate axis J2, and the differential axis J3. A fastening portion 69 is provided on the second circumferential wall portion 6e to fasten the second flange portion 61k and the third flange portion 62k. This fastening portion 69 protrudes radially outward from the outer surface of the second circumferential wall portion 6e.

[0063] like Figure 2As shown, the box-shaped portion 6f is provided on the shell body 61. The box-shaped portion 6f constitutes a part of the third storage portion 6C. The box-shaped portion 6f is located on the upper side of the first peripheral wall portion 6d. The box-shaped portion 6f is connected to the outer side surface of the first peripheral wall portion 6d. The box-shaped portion 6f has a side wall portion 6j that is rectangular frame-shaped when viewed from the top and a bottom wall portion 6k connected to the lower end of the side wall portion 6j. The side wall portion 6j surrounds the internal space of the third storage portion 6C from the horizontal direction (one axial side (-Y side) and the other side (+Y side)) and one side of the reference direction (+X side) and the other side (-X side)). In this embodiment, the side wall portion 6j has multiple faces. In more detail, the side wall portion 6j has a face facing one axial side (-Y side), a face facing the other axial side (+Y side), a face facing one side of the reference direction (+X side), and a face facing the other side of the reference direction (-X side). The bottom wall portion 6k and a portion of the first peripheral wall portion 6d are arranged side by side in the reference direction X. The bottom wall portion 6k and the first peripheral wall portion 6d cover the interior space of the third storage portion 6C from below. Furthermore, the side wall portion 6j only needs to have at least one surface and, when viewed from above, only needs to surround the interior space of the third storage portion 6C. For example, the side wall portion 6j may also have a shape other than a rectangular frame when viewed from above.

[0064] The top wall portion 6g is provided on the control unit cover 64. The top wall portion 6g constitutes a part of the third storage portion 6C. The top wall portion 6g is in the shape of a plate extending along the horizontal plane (XY plane). The top wall portion 6g is opposite to the bottom wall portion 6k and the first peripheral wall portion 6d in the vertical direction Z. The top wall portion 6g covers the internal space of the third storage portion 6C from the upper side. Figure 1 As shown, the control unit 7 is fixed to the top wall portion 6g in this embodiment. Alternatively, the control unit 7 may be fixed to the inner side surface of the box-shaped portion 6f. In other words, the control unit 7 may be fixed to the side wall portion 6j or the bottom wall portion 6k.

[0065] <Heating equipment>

[0066] like Figure 1 As shown, a pipe P is connected to the heating device 10 in this embodiment. The pipe P is a circulation path for circulating a fluid such as water, refrigerant or air. An external device that is the heating object of the heating device 10 is connected to the path of the pipe P. In addition, a pump (not shown) that pressurizes the fluid in the pipe P may also be connected to the path of the pipe P. In this embodiment, the external device is a battery B. That is, the pipe P connects the heating device 10 and the battery (external device) B. In addition, a part or the entire pipe P may be, for example, a part of the housing 6. In addition, the pipe P may also be composed of a component different from the housing 6.

[0067] When the outside temperature drops, the discharge voltage of battery B may decrease. In the drive device 1 of this embodiment, a temperature sensor T is provided on battery B, allowing control unit 7 to detect a drop in battery B's temperature. Furthermore, control unit 7 controls heating device 10 to heat battery B via pipe P, thereby ensuring stable operation of battery B. Furthermore, the system of the vehicle in which drive device 1 is installed can also detect the temperature of battery B.

[0068] like Figure 2 As shown, according to this embodiment, the heating device 10 is fixed to the outer side of the housing 6. As a result, the heating device 10 can be installed in the vehicle while being assembled to other parts of the drive device 1 (such as the motor 2, the drive device 1, and the control unit 7), which can simplify the assembly process to the vehicle.

[0069] According to this embodiment, by placing the heating device 10 on the outer side of the housing 6, the heat generated by the heating device 10 can be prevented from being transferred to other components (such as the control unit 7) compared to when the heating device 10 is placed inside the housing 6. Therefore, there is no need to provide components such as a thermal insulation structure between the heating device 10 and other components, which can prevent the drive device 1 from being enlarged. As a result, the drive device 1 can be miniaturized. In other words, according to this embodiment, the heating device 10 can be appropriately placed relative to the drive device 1.

[0070] According to this embodiment, the heating device 10 is fixed to the outer surface of the first housing portion 6A. Generally speaking, in a drive device having a motor and a power transmission mechanism, the vibration transmitted from the motor to the housing is smaller than the vibration transmitted from the power transmission mechanism to the housing. By placing the heating device 10 in the housing 6 of the drive device 1 closer to the motor 2 side, where vibration is smaller, the transmission of vibration to the heating device 10 can be suppressed.

[0071] like Figure 3 As shown, the heating device 10 of this embodiment is fixed to the outer peripheral surface of the first circumferential wall portion 6d. That is, the heating device 10 is fixed to the surface of the first housing portion 6A facing radially outward. In this embodiment, the projected area of the first housing portion 6A in the axial direction Y is smaller than the projected area of the second housing portion 6B in the axial direction Y. Therefore, by fixing the heating device 10 on the surface of the first housing portion 6A facing radially outward, it is easy to configure the heating device 10 to overlap with the second housing portion 6B when viewed from the axial direction Y, thereby reducing the projected area of the driving device 1 in the axial direction Y.

[0072] In this embodiment, the heating device 10 is arranged on the reference direction side (+X side) of the first storage portion 6A, biased upward relative to the motor axis J1. In this case, "the heating device 10 is arranged on the reference direction side relative to the motor axis J1" means that the geometric center of gravity of the heating device 10 is located above the motor axis J1.

[0073] By arranging the heating device 10 on the reference direction side (+X side) of the first housing portion 6A, it is possible to suppress an increase in the size of the drive device 1 in the axial direction Y and the vertical direction Z. Furthermore, when the reference direction side (+X side) corresponds to the rear of the vehicle, the heating device 10 can be easily protected from impacts such as when the vehicle is traveling forward and in a collision.

[0074] In this embodiment, the first circumferential wall portion 6d surrounds the motor 2 radially outward, resulting in an outer circumferential surface of the first circumferential wall portion 6d that is approximately cylindrical centered on the motor axis J1. When viewed in the axial direction Y, the portion of the first circumferential wall portion 6d located closest to the reference direction (+X side) is closer to the reference direction (+X side) than the portion of the side wall portion 6j located closest to the reference direction (+X side). Therefore, a space is defined above the motor axis J1 between the portion of the first circumferential wall portion 6d located closest to the reference direction (+X side) and the portion of the side wall portion 6j located closest to the reference direction (+X side). In this embodiment, by positioning the heater 10 upward relative to the motor axis J1, the heater 10 can be positioned in this space, obliquely above the substantially cylindrical first circumferential wall portion 6d, when viewed in the axial direction Y. This prevents the overall size of the drive device 1 from increasing in the reference direction X. In particular, in this embodiment, the upper end of the heater 10 is located below the upper end of the first housing portion 6A. Therefore, according to the present embodiment, the dead space around the first peripheral wall portion 6 d can be effectively utilized, and the heating device 10 can be suppressed from protruding upward.

[0075] If the heating device 10 protrudes significantly from the outer surface of the housing 6, there is a risk of interference between the heating device 10 and the vehicle when the drive device 1 is assembled in the vehicle. As described above, by locating the heating device 10 in the space surrounding the housing 6, the drive device 1 can be reduced in radial size. Specifically, by reducing the protrusion of the heating device 10 from the drive device 1, interference between the heating device 10 and the vehicle can be minimized when the drive device 1 is assembled in the vehicle. As a result, the drive device 1 can be accommodated in a smaller space within the vehicle.

[0076] A recess 6m that is recessed toward the radial inside is provided on the outer peripheral surface of the first circumferential wall portion 6d that is facing radially outward. That is, a recess 6m is provided on the outer side surface of the first housing portion 6A. In the present embodiment, the recess 6m is located above the motor axis J1 when viewed from the axial direction Y. At least a portion of the recess 6m is open toward the above-mentioned space. In the present embodiment, the heating device 10 is provided inside the recess 6m. Thus, the protruding height of the heating device 10 relative to the outer side surface of the first housing portion 6A can be reduced, and the driving device 1 as a whole can be miniaturized.

[0077] In this embodiment, the heating device 10 is positioned closer to the axially opposite side (+Y side) than the axially opposite end (-Y side) of the first side wall portion 6a. This prevents the heating device 10 from protruding axially from the axially opposite end of the housing 6, thereby preventing the drive device 1 from becoming larger in the axial direction and preventing the heating device 10 from interfering with the vehicle.

[0078] Modifications

[0079] In the following description of each modification, the same components as those in the previously described embodiment or modification are denoted by the same reference numerals and their description is omitted.

[0080] (Variation 1)

[0081] Figure 4 This is a front view of a driving device 101 according to Modification 1. A heating device 110 according to this modification is fixed to a radially outward surface of the first housing portion 6A.

[0082] In this modification, the heating device 110 is arranged on the reference direction side (+X side) of the first housing portion 6A and offset downward relative to the motor axis J1. That is, in this modification, the geometric center of gravity of the heating device 110 is located below the motor axis J1.

[0083] The heating device 110 is arranged on the reference direction side (+X side) of the first housing portion 6A, thereby preventing the drive device 101 from increasing in size in the axial direction Y and the vertical direction Z. Furthermore, when the reference direction side (+X side) corresponds to the rear of the vehicle, the heating device 110 can be easily protected from impacts such as when the vehicle is traveling forward and in a collision.

[0084] When viewed from the axial direction Y, an inclined surface 6dc is provided on the outer side of the first circumferential wall portion 6d, between the end 6da on one side of the reference direction (+X side) and the lower end 6db of the first circumferential wall portion 6d, which is inclined toward the other side of the reference direction (-X side) as it moves downward. The inclined surface 6dc is an arc-shaped surface centered on the motor axis J1 when viewed from the axial direction. A space is formed radially outside the inclined surface 6dc. Therefore, by disposing the heating device 110 downward relative to the motor axis J1, the heating device 110 can be arranged in the space obliquely below the inclined surface 6dc when viewed from the axial direction Y. In this way, the overall size of the drive device 101 in the reference direction X can be suppressed. In particular, in this modified example, the lower end of the heating device 110 is located above the lower end of the first storage portion 6A. Therefore, according to this modified example, the dead zone can be effectively utilized and the heating device 110 can be suppressed from protruding downward.

[0085] (Variation 2)

[0086] Figure 5 This is a front view of a driving device 201 according to Modification 2. A heating device 210 according to this modification is fixed to a radially outward surface of the first housing portion 6A.

[0087] The heating device 210 of this modified example is located on the other side of the reference direction of the first storage portion 6A (-X side), on the axial side of the second storage portion 6B (-Y side) and on the lower side of the third storage portion 6C. The heating device 210 is opposite to the first peripheral wall portion 6d in the reference direction X. The heating device 210 is opposite to the extension portion 6q of the second side wall portion 6b in the axial direction Y. The heating device 210 is opposite to the bottom wall portion 6k in the up and down directions. That is, the heating device 210 of this modified example is arranged in a space surrounded by three parts of the shell 6 (the first peripheral wall portion 6d, the bottom wall portion 6k and the extension portion 6q) from three directions. By arranging the heating device 210 in this space, it is possible to prevent the heating device 210 from protruding to the outside from the outer side surface of the shell 6, and the drive device 201 can be miniaturized. In addition, when the drive device 201 is assembled in the vehicle, it is possible to prevent the heating device 210 from interfering with the vehicle.

[0088] In this modified example, the heating device 210 is positioned on the other side (-X side) of the first housing portion 6A in the reference direction. This prevents the drive device 201 from becoming larger in the axial direction Y and in the vertical direction Z. Furthermore, since the other side (-X side) in the reference direction corresponds to the rear of the vehicle, the heating device 210 is easily protected from impacts such as collisions while the vehicle is traveling forward.

[0089] The heating device 210 of this modified example is positioned between the motor axis J1 and the differential axis J3 in the reference direction X. Therefore, when viewing the drive device 201 from the axial direction Y, the heating device 210 is less likely to protrude toward one side or the other relative to the second housing portion 6B in the reference direction X. As a result, the projected area of the drive device 201 in the axial direction Y can be reduced, enabling the drive device 201 to be miniaturized.

[0090] In this modified example, the heating device 210 is positioned below the third housing section 6C and above the differential axis J3. Therefore, when viewing the drive device 201 from the axial direction Y, the heating device 210 is less likely to protrude upward or downward relative to the second housing section 6B and the third housing section 6C. As a result, the projected area of the drive device 201 in the axial direction Y can be reduced, enabling a more compact drive device 201.

[0091] As in the above-described embodiment, the heating device 210 of this modified example is positioned closer to the other axial side (+Y side) than the end of the first side wall portion 6a on one axial side (-Y side). This prevents the heating device 210 from protruding axially from the end of the housing 6 on one axial side, thereby preventing the drive device 201 from increasing in size in the axial direction and preventing the heating device 210 from interfering with the vehicle.

[0092] (Variation 3)

[0093] Figure 6 This is a front view of the drive device 301 of Modification 3. The heating device 310 of this modification is fixed to the radially outward surface of the first housing portion 6A. Similar to Modification 2, the heating device 310 of this modification is located in a space surrounded from three sides by the three parts of the housing 6 (the first peripheral wall portion 6d, the bottom wall portion 6k, and the extension portion 6q). This allows the drive device 301 to be miniaturized. Furthermore, when the drive device 301 is assembled in a vehicle, interference between the heating device 310 and the vehicle can be suppressed.

[0094] In this modified example, the heating device 310 is positioned on the other side (-X side) of the first housing portion 6A in the reference direction. This prevents the drive device 301 from becoming larger in the axial direction Y and in the vertical direction Z. Furthermore, since the other side (-X side) in the reference direction corresponds to the rear of the vehicle, the heating device 310 is easily protected from impacts such as collisions while the vehicle is traveling forward.

[0095] The heating device 310 of this modification is arranged between the motor axis J1 and the differential axis J3 in the reference direction X. Therefore, the projected area of the driving device 301 in the axial direction Y can be reduced, and the driving device 301 can be miniaturized.

[0096] In this variation, the heating device 310 is positioned below the differential axis J3. This placement of the heating device 310 below the differential axis J3 allows for a space above the differential axis J3. This space allows for at least a portion of another component (in this variation, the third storage section 6C) to be accommodated, resulting in a more compact drive device 301 overall.

[0097] (Variation 4)

[0098] Figure 7 4 is a plan view of a driving device 401 according to Modification 4. A heating device 410 according to this modification is fixed to a radially outward surface of the first housing portion 6A.

[0099] The heating device 410 of this modification is arranged on the upper side of the motor 2. In addition, as in the above-mentioned embodiment, a control unit 7 and a third storage unit 6C for storing the control unit 7 are arranged on the upper side of the motor 2. In this modification, the position of the heating device 410 in the up-down direction Z overlaps with the position of the third storage unit 6C in the up-down direction. The heating device 410 and the third storage unit 6C are arranged on the upper side of the motor 2 in at least one of the axial direction Y and the reference direction X. According to this modification, the control unit 7 and the heating device 410 can be arranged close to each other. For example, when the control unit 7 and the heating device 410 are connected by a connecting wiring 408b, the connecting wiring 408b can be shortened. In addition, in this specification, "connecting wiring" refers to a connection path that electrically connects two electrical installation parts to each other, and is not limited to cable-shaped wiring, but also includes a connection path using a bus bar, etc.

[0100] In this variation, the heating device 410 and the control unit 7 are arranged in parallel along the reference direction X. Specifically, in this variation, the heating device 410 is positioned on the other side of the control unit 7 in the reference direction (the -X side), while the control unit 7 is positioned on the one side of the heating device 410 in the reference direction (the +X side). This arrangement makes it easier to position the control unit 7 above the motor 2, shortening the wiring 408a connecting the control unit 7 and the motor 2. Furthermore, since the heating device 410 can be positioned within the space surrounded by the first, second, and third housing sections 6A, 6B, and 6C, it is possible to prevent the heating device 410 from protruding from either the end of the first housing section 6A on one axial side (the -Y side) or the end of the second housing section 6B on the other side of the reference direction (the -X side), thereby reducing the size of the drive device 401. Furthermore, when the drive device 401 is assembled in a vehicle, interference between the heating device 410 and the vehicle can be prevented. Furthermore, the control unit 7 and the heating device 410 do not necessarily need to be connected via the wiring 408b. In this case, the heating device 410 may be connected to the system on the vehicle side.

[0101] (Variant 5)

[0102] Figure 8 This is a top view of the drive device 501 of Modification 5. The heating device 510 of this modification is fixed to the radially outward surface of the first storage portion 6A. Furthermore, the heating device 510 of this modification is arranged above the motor 2. According to this modification, the control unit 7 and the motor 2 can be arranged close together, and the control unit 7 and the heating device 510 can be arranged close together. Thus, for example, when the control unit 7 and the heating device 510 are connected via the connecting wiring 508b, the connecting wiring 508b between the control unit 7 and the heating device 510 can be shortened.

[0103] In this variation, the heating device 510 and the control unit 7 are arranged side by side in the axial direction Y. Specifically, in this variation, the heating device 510 is arranged on the other axial side (+Y side) of the control unit 7, while the control unit 7 is arranged on one axial side (-Y side) of the heating device 510. Furthermore, in this variation, the power transmission mechanism 3 is arranged on the other axial side (+Y side) of the motor 2, and the connecting wiring 508a between the motor 2 and the control unit 7 is arranged on one axial side (-Y side) of the motor 2. In this variation, the heating device 510 is arranged on the other axial side (+Y side) of the control unit 7. Therefore, the heating device 510 and the connecting wiring 508b are less likely to interfere with the connecting wiring 508a between the motor 2 and the control unit 7. In other words, this variation ensures a wider space for the connecting wiring 508a between the motor 2 and the control unit 7. Furthermore, when viewed from above, the heating device 510 does not protrude from the first and second housing sections 6A and 6B in at least either the reference direction X or the axial direction Y. Therefore, even when the drive device 501 includes the heater 510, it is possible to suppress an increase in size in at least one of the reference direction X and the axial direction Y. Furthermore, when the drive device 501 is assembled in a vehicle, it is possible to suppress interference between the heater 510 and the vehicle. Furthermore, the controller 7 and the heater 510 do not necessarily need to be connected via the connecting wire 508b. In this case, the heater 510 can be connected to the vehicle-side system.

[0104] In this modified example, the heating device 510 and the control unit 7 are arranged side by side in the axial direction Y on the upper side of the motor 2, and the heating device 510 is arranged on the other axial side (+Y side) of the control unit 7. However, when the heating device and the control unit are arranged side by side in the axial direction Y on the upper side of the motor, a configuration may be adopted in which the heating device is arranged on one axial side (-Y side) of the control unit.

[0105] (Variation 6)

[0106] Figure 91 is a top view of a drive device 601 according to Modification 6. A heating device 610 according to this modification is fixed to a radially outward surface of the first housing portion 6A. The heating device 610 according to this modification is disposed above the motor 2.

[0107] In this modification, the control unit 607 and the third storage unit 606C that accommodates the control unit 607 have an L-shape extending along the axial direction Y and the reference direction X, respectively, when viewed from the upper and lower directions Z. In addition, the heating device 610 and at least a portion of the control unit 607 are arranged in the reference direction X. Moreover, the heating device 610 and at least a portion of the control unit 607 are arranged in the axial direction Y. In this modification, the heating device 610 and the control unit 607 are electrically connected via a connecting wiring 608b. That is, the drive device 601 of this modification has a structure that combines modification 4 and modification 5. Therefore, according to this modification, it is easy to arrange the control unit 607 on the upper side of the motor 2, and the connecting wiring 608a between the control unit 607 and the motor 2 can be shortened. Moreover, in this modification, the heating device 610 is arranged at a position closer to the other side of the axial direction than at least a portion of the control unit 607. The control unit 607 is arranged on one axial side of the heating device 610 and is connected to the motor 2 via the connecting wiring 608a on the axial side. Therefore, it is possible to suppress interference between the heating device 610 and the connecting wiring 608a located on the axial side (-Y side) of the motor 2, and it is easy to ensure space for configuring the connecting wiring 608a. In addition, since the heating device 610 and the control unit 607 can be connected in any direction of the axial direction Y and the reference direction X, for example, the degree of freedom of configuration of electronic components provided in the control unit 607 can be increased. In addition, the heating device 610 and the control unit 607 do not need to be connected by the connecting wiring. In this case, the heating device 610 can be connected to the system on the vehicle side.

[0108] In addition, the shape of the third storage section 606C does not need to be an L-shape extending along the axial direction Y and the reference direction X when viewed from the up-down direction Z. For example, the shape of the third storage section 606C when viewed from the up-down direction Z may be a roughly C-shaped or H-shaped shape extending along the axial direction Y and the reference direction X and opening toward one axial side (-Y side) or the other side (+Y side), or a roughly C-shaped or H-shaped shape extending along the axial direction Y and the reference direction X and opening toward at least one of the reference direction one side or the other side. In this case, the heating device 610 is also suppressed from protruding from the end of the second storage section 6B on the other side of the reference direction (-X side). The heating device 610 is suppressed from protruding from the end of the first storage section 6A on one axial side (-Y side). As a result, the drive device 601 can be suppressed from being enlarged. In addition, when the drive device 601 is assembled in a vehicle, the heating device 610 can be suppressed from interfering with the vehicle.

[0109] In this modification, the heating device can also be arranged on one axial side (-Y side) of the control unit, similar to the above-mentioned modification. In this case, by forming the third storage portion into an L-shape that is reversed in the axial direction or reference direction compared to this modification, the size of the drive device can be suppressed.

[0110] (Variant 7)

[0111] Figure 10 This is a side view of the drive device 701 of the modified example 7 as viewed from the other side (-X side) of the reference direction. The heating device 710 of this modified example is fixed to the radially outward surface of the first storage section 6A. In addition, the heating device 710 of this modified example is arranged on the lower side of the first storage section 6A. As a result, it is possible to prevent the heating device 710 from protruding to one side or the other side of the reference direction X of the first storage section 6A, making it easy to use one side or the other side of the reference direction X of the first storage section 6A as a configuration space for other components (pumps, coolers, etc.).

[0112] Furthermore, by arranging the heating device 710 below the first housing portion 6A, it is easier to arrange the heating device 710 inside the projected area of the first housing portion 6A in the vertical direction Z, thereby reducing the projected area of the driving device 701 in the vertical direction Z. Consequently, the driving device 701 can be miniaturized.

[0113] Similar to the above-described embodiment, the first housing portion 6A includes a first circumferential wall portion 6d that surrounds the motor 2 from the radially outer side, and a first flange portion 61f that protrudes radially outward from the first circumferential wall portion 6d. In this modified example, at least a portion of the heating device 710 overlaps with the first flange portion 61f in the axial direction Y. That is, when viewed from the axial direction Y, the heating device 710 and the first flange portion 61f overlap. Therefore, the portion where the heating device 710 and the first flange portion 61f overlap in the axial direction Y can prevent the axial projection area of the drive device 701 from increasing in size. In other words, since at least a portion of the heating device 710 overlaps with the first flange portion 61f in the axial direction Y, the heating device 710 can be prevented from protruding downward in the vertical direction. This allows for miniaturization of the drive device 701. Furthermore, the heating device 710 preferably overlaps axially with at least one of the second circumferential wall portion 6e, the second flange portion 61k, and the third flange portion 62k. Furthermore, the lower portion of the heating device 710 is preferably located above the second peripheral wall portion 6e, the second flange portion 61k, and the third flange portion 62k of the second housing portion 6B. This prevents the heating device 710 from protruding downward, enabling a reduction in the size of the drive device 701. Furthermore, when the drive device 701 is assembled in a vehicle, interference between the heating device 710 and the vehicle can be suppressed.

[0114] (Variation 8)

[0115] Figure 11 This is a side view of the drive device 801 of Modification 8, viewed from the other side (-X side) of the reference direction. The heating device 810 of this modification is fixed to the axially one side (-Y side) of the first housing section 6A. Specifically, the heating device 810 of this modification is fixed to the axially one side (-Y side) of the motor cover 63, which serves as the first sidewall 6a. The heating device 810 is axially aligned with the first housing section 6A and the second housing section 6B.

[0116] According to this variation, by arranging the heating device 810 on one axial side (-Y side) of the first housing portion 6A, the drive device 801 can be miniaturized in the radial direction. Compared with the structure in which the heating device 810 is arranged on the radial outside of the motor 2, the heat generated by the motor 2 can be suppressed from being transferred to the heating device 810. Other components (pumps, coolers, etc.) installed on the drive device 801 can be easily arranged in the area radially outside the first housing portion 6A. A part of the vehicle (chassis, etc.) on which the drive device 801 is installed can also be arranged in the area radially outside the first housing portion 6A. In this case, the storage space of the drive device 801 in the vehicle can be reduced. In addition, according to this variation, the heating device 810 can be arranged to overlap with the first housing portion 6A when viewed from the axial direction Y. Thereby, the miniaturization of the drive device 801 can be achieved.

[0117] Furthermore, the heater 810 in this modified example is positioned on the motor axis J1. That is, the motor axis J1 intersects the heater 810. The heater 810 overlaps with the rotor 20 in the axial direction Y. Therefore, when viewed from the axial direction Y, the heater 810 can be easily positioned near the center of the first housing section 6A and positioned inward of the axially projected area of the first housing section 6A. Consequently, when viewed from the axial direction Y, the heater 810 is less likely to protrude outside the projected area of the first housing section 6A. That is, the heater 810 is radially positioned closer to the motor axis J1 than the first flange 61f and the first peripheral wall 6d. Therefore, when the drive device 801 is installed in a vehicle, etc., interference between the heater 810 and the vehicle can be minimized. Furthermore, the motor axis J1 does not necessarily intersect the heater 810. The heater 810 can also be positioned around the motor axis J1. The radially outer portion of the heating device 810 is preferably located radially closer to the motor axis J1 than the first flange portion 61 f.

[0118] (Variant 9)

[0119] Figure 12This is a side view of the drive device 901 of modification 9 as viewed from the other side (-X side) of the reference direction. The heating device 910 of this modification is fixed to one axial side (-Y side) of the first storage section 6A. According to this modification, the heating device 910 can be configured to overlap with the first storage section 6A when viewed from the axial direction Y. Therefore, the drive device 901 can be miniaturized in the radial direction. Compared with the structure in which the heating device 910 is configured on the radial outside of the motor 2, the heat generated by the motor 2 can be suppressed from being transferred to the heating device 910. In addition, by configuring the heating device 910 on one axial side (-Y side) of the first storage section 6A, it is easy to effectively utilize the area radially outside the first storage section 6A. That is, it is easy to configure other components (pumps, coolers, etc.) installed on the drive device 901 in the area radially outside the first storage section 6A. A part of the vehicle (chassis, etc.) on which the drive device 901 is installed can also be configured in the area radially outside the first storage section 6A.

[0120] In this modification, the heating device 910 is arranged at a position different from the motor axis J1 when viewed from the axial direction Y. The heating device 910 is arranged at a position that does not intersect with the motor axis J1. More specifically, the heating device 910 of this modification is located below the motor axis J1. The shaft 21 of the motor 2 is arranged on the motor axis J1 (see Figure 1 ). Therefore, when the heating device is arranged on the motor axis J1, the vibration of the shaft may be transmitted to the heating device 910 via the bearings held by the motor cover 63, etc. According to this modification, however, by arranging the heating device 910 at a position different from the motor axis J1, the vibration of the shaft 21 can be suppressed from being transmitted to the heating device 910. In addition, the heating device 910 can be set at any position as long as it is at a position different from the motor axis J1. For example, it can also be set on the upper side of the motor axis J1, on one side of the reference direction, or on the other side. In addition, as long as the entire heating device 910 is offset radially outward relative to the motor axis J1, a part of the heating device 910 may also overlap with the motor axis J1. The radially outer portion of the heating device 910 is preferably located radially closer to the motor axis J1 than the first flange portion 61f.

[0121] In addition, sometimes components such as bearings that support the shaft 21 so as to be rotatable and rotation sensors that measure the rotation angle of the rotor 20 are arranged on the motor axis J1 (hereinafter referred to as the axial line component 909). In the case where the heating device 910 is arranged on the motor axis J1, it is necessary to arrange the heating device 910 on the axial side (-Y side) of the axial line component 909, and the drive device 901 may be enlarged in the axial direction. Therefore, it is preferred that the heating device 910 is arranged at a position that overlaps with the axial line component 909 when viewed from the radial direction. According to this modification, by arranging the heating device 910 at a position different from the motor axis J1 and arranging the heating device 910 on the radial outside of the axial line component 909, the enlargement of the drive device 901 in the axial direction Y can be suppressed.

[0122] (Variation 10)

[0123] Figure 13 This is a side view of drive device 1001 according to Modification 10, viewed from the reference direction side (+X side). The configuration of heating device 10 provided in drive device 1001 according to this modification is the same as that of the aforementioned embodiment. Drive device 1001 according to this modification differs from the aforementioned embodiment and its modifications in the configuration of control units 7a and 7b.

[0124] The drive device 1001 of this variant has a first control unit 7a and a second control unit 7b. In addition, the housing 1006 of this variant has a third storage unit 6C for storing the first control unit 7a and a fourth storage unit 6D for storing the second control unit 7b. For example, one of the first control unit 7a and the second control unit 7b is an inverter, and the other is an integrated power system. The heating device 10 is located between the second storage unit 6B and the fourth storage unit 6D in the axial direction Y. At least a portion of the heating device 10 overlaps with the third storage unit 6C and the first storage unit 6A in the reference direction X. The heating device 10 can also be configured to span the third storage unit 6C and the first storage unit 6A. In addition, the drive device 1001 can also have a third control unit that is a part of at least one of the first control unit 7a and the second control unit 7b. In this case, the housing 1006 can have a fifth storage unit for storing the third control unit.

[0125] The above describes the embodiments of the present invention, but the various structures and their combinations in the embodiments are examples, and additions, omissions, substitutions, and other changes to the structures can be made without departing from the scope of the purpose of the present invention. In addition, the present invention is not limited to the embodiments.

[0126] In the above embodiment and its modified examples, the heating device is fixed only to the first storage section. However, the heating device only needs to be fixed at least partially to the first storage section, and may be fixed across other storage sections.

[0127] In the above-described embodiment and its variations, the heating device heats the battery via the fluid within the pipe. However, the heating target of the heating device is not limited to this embodiment. For example, the heating device may heat the fluid of a vehicle air conditioner. Alternatively, the heating device may heat the fluid stored within a housing.

[0128] In the above embodiment and its variations, the heating device is described as being controlled by a control unit. However, the heating device may also be installed in the vehicle and controlled by a control unit that controls various parts of the vehicle. In this case, the temperature sensor mounted on the battery is connected to the control unit that controls various parts of the vehicle.

[0129] The power transmission mechanism structure shown in the above-described embodiment and its variations is merely an example. Alternatively, the power transmission mechanism may be one in which the first shaft and the output shaft are coaxially arranged. In this case, a portion of the output shaft passes radially inward of the rotor. Furthermore, the motor axis J1, the intermediate axis J2, and the differential axis J3 may not be aligned along the reference direction X. For example, at least one of the motor axis J1, the intermediate axis J2, and the differential axis J3 may be positioned vertically differently from the other two.

[0130] In the above embodiment, the case where the recess 6m for accommodating the heating device 10 is provided on the outer side surface of the first peripheral wall portion 6d is described. The structure in which the heating device is arranged inside the recess can also be adopted in other modified examples. That is, the recess can be arranged at any position on the outer side surface of the first receiving portion, and by arranging the heating device inside the recess, the driving device can be miniaturized. As an example, in Modification 8 (refer to Figure 11 ) in the driving device 801, a recess may be provided on the surface of the first side wall portion 6a facing the axial side (-Y side), and a heating device 810 may be arranged inside the recess.

[0131] Furthermore, the power transmission mechanism described in the above embodiment and its modified examples is a mechanism that transmits the rotation of the rotor after reducing speed. However, the power transmission mechanism may be a mechanism that speeds up the rotation of the rotor after transmitting it in part or in its entirety.

[0132] Additionally, the present technology can adopt the following structures.

[0133] (1) A driving device comprises: a motor having a rotor rotatable about a motor axis; a power transmission mechanism connected to the rotor and transmitting the rotation of the rotor; a housing having a first housing portion for accommodating the motor and a second housing portion for accommodating the power transmission mechanism; and a heating device fixed to an outer side surface of the housing.

[0134] (2) The driving device according to (1), wherein the heating device is fixed to an outer side surface of the first housing portion.

[0135] (3) A driving device according to (2), wherein a direction orthogonal to both the axial direction and the up-down direction is used as a reference direction, the power transmission mechanism has a differential device capable of rotating around a differential axis parallel to the motor axis, the motor axis is located on one side of the reference direction relative to the differential axis when viewed from the axial direction, and the heating device is arranged on the upper side relative to the motor axis on the one side of the reference direction of the first housing portion.

[0136] (4) A driving device according to (2), wherein a direction orthogonal to both the axial direction and the up-down direction is used as a reference direction, the power transmission mechanism has a differential device capable of rotating around a differential axis parallel to the motor axis, the motor axis is located on one side of the reference direction relative to the differential axis when viewed from the axial direction, and the heating device is arranged on the lower side relative to the motor axis on the one side of the reference direction of the first housing portion.

[0137] (5) A driving device according to (2), wherein a direction orthogonal to both the axial direction and the up-down direction is used as a reference direction, the power transmission mechanism has a differential device capable of rotating around a differential axis parallel to the motor axis, and when viewed from the axial direction, the motor axis is located on one side of the reference direction relative to the differential axis, and the heating device is arranged on the other side of the reference direction of the first storage portion.

[0138] (6) The drive device according to (5), wherein the heating device is arranged between the motor axis and the differential axis in the reference direction.

[0139] (7) The drive device according to (5), wherein the drive device includes a control unit arranged on the upper side of the motor, the housing has a third storage unit for storing the control unit, and the heating device is arranged below the third storage unit and above the differential axis.

[0140] (8) The drive device according to any one of (1) to (5), wherein the heating device is arranged below the differential axis.

[0141] (9) The driving device according to (2), further comprising a control unit disposed above the motor, wherein the housing includes a third housing portion for housing the control unit, and the heating device is disposed above the motor.

[0142] (10) The driving device according to (9), wherein a direction perpendicular to both the axial direction and the up-down direction is used as a reference direction, and the heating device and at least a part of the control unit are arranged in the reference direction.

[0143] (11) The driving device according to (9) or (10), wherein the heating device and at least a part of the control unit are arranged side by side in the axial direction.

[0144] (12) The driving device according to (2), wherein the heating device is arranged on a lower side of the first housing portion.

[0145] (13) According to the driving device described in any one of (2) to (12), the first housing portion has: a cylindrical peripheral wall portion extending in the axial direction; and a flange portion protruding radially outward from the peripheral wall portion, and the heating device overlaps with the flange portion when viewed from the axial direction.

[0146] (14) The driving device according to (2), wherein the heating device is arranged on one side in the axial direction of the first housing portion.

[0147] (15) The drive device according to (14), wherein the heating device is arranged at a position different from the motor axis when viewed from the axial direction.

[0148] (16) The driving device according to any one of (2) to (15), wherein a recess is provided on an outer side surface of the first housing portion, and the heating device is arranged inside the recess.

[0149] (17) The driving device according to any one of (1) to (16), wherein a pipe connecting the heating device and an external device is connected to the heating device.

Claims

1. A driving device, characterized in that: have: a motor having a rotor rotatable about a motor axis; a power transmission mechanism connected to the rotor to transmit the rotation of the rotor; a housing having a first housing portion for housing the motor and a second housing portion for housing the power transmission mechanism; as well as A heating device is fixed to the outer side of the shell.

2. The driving device according to claim 1, characterized in that The heating device is fixed to the outer side surface of the first receiving portion.

3. The driving device according to claim 2, characterized in that The direction perpendicular to both the axial direction and the vertical direction is taken as the reference direction. The power transmission mechanism includes a differential device rotatable about a differential axis parallel to the motor axis. When viewed from the axial direction, the motor axis is located on one side of the reference direction relative to the differential axis. The heating device is arranged on the reference direction side of the first housing portion so as to be offset upward with respect to the motor axis.

4. The driving device according to claim 2, characterized in that The direction perpendicular to both the axial direction and the vertical direction is taken as the reference direction. The power transmission mechanism includes a differential device rotatable about a differential axis parallel to the motor axis. When viewed from the axial direction, the motor axis is located on one side of the reference direction relative to the differential axis. The heating device is arranged on the reference direction side of the first housing portion and offset downward with respect to the motor axis.

5. The driving device according to claim 2, characterized in that The direction perpendicular to both the axial direction and the vertical direction is taken as the reference direction. The power transmission mechanism includes a differential device rotatable about a differential axis parallel to the motor axis. When viewed from the axial direction, the motor axis is located on one side of the reference direction relative to the differential axis. The heating device is arranged on the other side of the reference direction of the first housing portion.

6. The driving device according to claim 5, characterized in that The heating device is arranged between the motor axis and the differential axis in the reference direction.

7. The driving device according to claim 5, characterized in that A control unit is provided, wherein the control unit is arranged on the upper side of the motor, The housing has a third receiving portion for receiving the control portion. The heating device is arranged below the third housing portion and above the differential axis.

8. The driving device according to claim 5, characterized in that The heating device is arranged below the differential axis.

9. The driving device according to claim 2, characterized in that A control unit is provided, wherein the control unit is arranged on the upper side of the motor, The housing has a third receiving portion for receiving the control portion. The heating device is arranged on an upper side of the motor.

10. The driving device according to claim 9, characterized in that The direction perpendicular to both the axial direction and the vertical direction is taken as the reference direction. The heating device and at least a portion of the control unit are arranged side by side in the reference direction.

11. The driving device according to claim 9, characterized in that The heating device and at least a portion of the control unit are arranged side by side in the axial direction.

12. The driving device according to claim 2, characterized in that The heating device is arranged on the lower side of the first storage portion.

13. The driving device according to claim 2, characterized in that The first housing portion includes a cylindrical peripheral wall portion extending in the axial direction and a flange portion protruding radially outward from the peripheral wall portion. The heating device overlaps with the flange portion when viewed from the axial direction.

14. The driving device according to claim 2, characterized in that The heating device is arranged on one axial side of the first housing portion.

15. The driving device according to claim 14, characterized in that The heating device is arranged at a position different from the motor axis when viewed from the axial direction.

16. The driving device according to claim 2, characterized in that A recess is provided on the outer side of the first receiving portion. The heating device is arranged inside the recess.

17. The driving device according to any one of claims 1 to 16, characterized in that: The heating device is connected to a pipeline connecting the heating device and an external device.

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