Transfer device

Abstract

A transfer device reduces the number of coolant supply ports when cooling a rotating electric machine. The power transmission device (10) includes: a rotating electric machine (40), a housing (41) that houses a stator (43) of the rotating electric machine (40), and a pipe (53) that is provided outside the housing (41) and serves as a coolant supply member having a hole (53a). An opening (41c) is provided in the upper part of the housing (41), and the opening (41c) guides oil discharged from the hole (53a). An oil storage portion (41d) that forms an oil accumulation is provided in the lower part of the housing (41).

Description

Technical Field

[0001] The present invention relates to a transfer device. Background Art

[0002] Patent Document 1 discloses a cooling structure of a rotating electric machine, in which coolant flow tubes are provided over substantially the entire circumference of the outer end face in the axial direction of the rotating electric machine, and coolant is sprayed onto substantially the entire surface of the outer end face in the axial direction of the rotating electric machine.

[0003] Prior Art Documents

[0004] Patent Documents

[0005] Patent Document 1: Japanese Unexamined Patent Application Publication No. 2015-211543

[0006] Problems to be Solved by the Invention

[0007] When oil is supplied over the entire circumference of the rotating electric machine, the number of nozzles (coolant supply ports) increases. When the number of nozzles increases, there is a tendency for the injection force of each nozzle to decrease. Summary of the Invention

[0008] The present invention has been made in view of such problems, and an object thereof is to reduce the number of coolant supply ports when cooling a rotating electric machine.

[0009] A transfer device according to an aspect of the present invention includes: a rotating electric machine; a housing that houses a stator of the rotating electric machine; a coolant supply member that is provided outside the housing and has a coolant supply port, an introduction port is provided in an upper portion of the housing, the introduction port introduces coolant discharged from the coolant supply port, and a coolant storage portion that forms a coolant accumulation is provided in a lower portion of the housing.

[0010] Effects of the Invention

[0011] According to the above aspect, at least the lower side of the housing is cooled by the coolant flowing down from the upper part of the housing, so the coolant supply port on the lower side of the housing can be omitted, and thus the number of coolant supply ports can be reduced. Therefore, according to the above aspect, when setting at least one or more refrigerant supply ports, the number of coolant supply ports can be reduced. As a result, the number of coolant supply ports is reduced as much as possible, for example, to the minimum necessary. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic configuration diagram of a hybrid vehicle equipped with the device according to an embodiment of the present invention.

[0013] Figure 2 is a cross-sectional view of the rotating electric machine.

[0014] Figure 3 This is a diagram showing the main part of the stator.

[0015] Figure 4 This is a diagram showing the housing and the pipe together.

[0016] Figure 5 This is a diagram showing the intermediate cover together with the pipe or the chain.

[0017] Description of Reference Numerals

[0018] 10 Power transmission device (device)

[0019] 40 Rotating electric machine

[0020] 31 Intermediate cover

[0021] 31a Protrusion (protrusion of relative component)

[0022] 41 Housing

[0023] 41c Opening (inlet)

[0024] 41d Oil storage part (coolant storage part)

[0025] 41e Protrusion (protrusion of housing)

[0026] 43 Stator

[0027] 431 Stator core

[0028] 432 Insulator

[0029] 433 Stator coil

[0030] 53 Pipe (coolant supply component)

[0031] 53a Hole (coolant supply port)

[0032] 55 Sprocket (chain wheel)

[0033] 57 Chain Detailed Description of the Invention

[0034] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0035] Hereinafter, a hybrid vehicle (hereinafter simply referred to as "vehicle") 100 equipped with a power transmission device 10 as an embodiment of the present invention will be described with reference to the drawings.

[0036] Figure 1 This is a schematic structural diagram of the vehicle 100. As Figure 1 shown, the vehicle 100 includes: an engine 1, and a power transmission device 10 provided on the power transmission path connecting the engine 1 and the drive wheels 5.

[0037] In the present embodiment, the power transmission device 10 is a transmission, and includes: a speed change mechanism 20, a forward and reverse switching mechanism 30, and a rotary electric machine 40.

[0038] The rotary electric machine 40 is disposed between the speed change mechanism 20 and the engine 1 in the power transmission path.

[0039] The rotary electric machine 40 includes: a housing 41, a cover 42 as a fixing member which is an opening portion on the engine 1 side of the housing 41, a stator 43 provided on the inner periphery of the housing 41, a rotary shaft 44, a rotor 80 provided on the outer periphery of the rotary shaft 44, and a clutch 48 for disconnecting / connecting the rotor 80 and the input shaft 11. The rotor 80 includes a rotor frame 81 and a core 82 provided on the outer periphery of the rotor frame 81.

[0040] The cover 42 is coupled to the outer shell 12 (not shown) of the power transmission device 10 with bolts (not shown), whereby the rotary electric machine 40 is fixed to the power transmission device 10.

[0041] The input shaft 11 is rotatably supported on the cover 42 via a bearing 50, and inputs the output rotation of the engine 1. The rotary shaft 44 is rotatably supported on the housing 41 via a bearing 51.

[0042] The clutch 48 is a normally open hydraulic clutch. The clutch 48 is controlled to be connected / released by the hydraulic pressure regulated by a hydraulic control valve unit (not shown). The clutch 48 is a wet multi-plate clutch, but other clutches may also be used.

[0043] When the clutch 48 is connected, the input shaft 11 is directly connected to the rotor 80. That is, the input shaft 11 is directly connected to the rotary shaft 44 and rotates at the same speed.

[0044] The rotary electric machine 40 can operate as a motor that receives power supply from a battery (not shown) and rotates for driving. In addition, when the rotor 80 receives rotational energy from the drive wheel 5, the rotary electric machine 40 functions as a generator and can charge the battery.

[0045] The speed change mechanism 20 has a primary pulley 2 and a secondary pulley 3 arranged in a V-groove arrangement, and a belt 4 wound around the V-grooves of the pulleys 2 and 3.

[0046] The engine 1 is coaxially arranged with the primary pulley 2, and between the engine 1 and the primary pulley 2, the rotary electric machine 40 and the forward and reverse switching mechanism 30 are sequentially provided starting from one side of the engine 1.

[0047] The forward and reverse switching mechanism 30 mainly consists of a double planet gear set 30a. Its sun gear is coupled to the rotating shaft 44 of the rotating electric machine 40, and the planet carrier is coupled to the primary pulley 2 of the speed change mechanism 20. The forward and reverse switching mechanism 30 further includes a forward clutch 30b that directly connects between the sun gear and the planet carrier of the double planet gear set 30a, and a reverse brake 30c that fixes the ring gear. Then, when the forward clutch 30b is engaged, the input rotation from the rotating shaft 44 is transmitted to the primary pulley 2 in the original rotation direction, and when the reverse brake 30c is engaged, the input rotation from the rotating shaft 44 is reversed and transmitted to the primary pulley 2.

[0048] The forward clutch 30b is engaged by supplying clutch pressure from the oil pressure control valve unit when the forward driving mode is selected as the driving mode of the vehicle 100. The reverse brake 30c is engaged by supplying brake pressure from the oil pressure control valve unit when the reverse driving mode is selected as the driving mode of the vehicle 100.

[0049] The rotation of the primary pulley 2 is transmitted to the secondary pulley 3 via the belt 4, and the rotation of the secondary pulley 3 is transmitted to the drive wheels 5 via the output shaft 8, the gear set 9, and the differential gear device 15.

[0050] In order to be able to change the speed ratio between the primary pulley 2 and the secondary pulley 3 in the above power transmission, one of the conical plates forming the V-grooves of the primary pulley 2 and the secondary pulley 3 is set as a fixed conical plate 2a, 3a, and the other is set as a movable conical plate 2b, 3b that can be displaced in the axial direction.

[0051] By supplying primary pulley pressure and secondary pulley pressure from the oil pressure control valve unit, these movable conical plates 2b, 3b are pressed toward the fixed conical plates 2a, 3a, so that the belt 4 frictionally engages with the conical plates to perform power transmission between the primary pulley 2 and the secondary pulley 3.

[0052] During speed change, due to the differential pressure between the primary pulley pressure and the secondary pulley pressure generated corresponding to the target speed ratio, the widths of the V-grooves of the two pulleys 2, 3 change, and the winding circle diameters of the belt 4 relative to the pulleys 2, 3 continuously change, thereby achieving the target speed ratio.

[0053] A pipe 53, which is a coolant supply component extending in an arc shape along the circumferential direction of the rotating electric machine 40, and an intermediate cover 31 that covers the rotating electric machine 40 side of the forward and reverse switching mechanism 30 and is axially opposed to the rotating electric machine 40 via the pipe 53 are provided between the rotating electric machine 40 and the forward and reverse switching mechanism 30. The intermediate cover 31 serves as a relative component and faces the housing 41 of the rotating electric machine 40.

[0054] The pipe 53 is connected to an oil passage provided inside the intermediate cover 31, and the oil supplied via the intermediate cover 31 is discharged from a plurality of holes 53a formed on the side of the rotating electric machine 40 to the stator 43 of the rotating electric machine 40.

[0055] An oil storage portion 41d for accumulating oil is provided at the lower portion of the housing 41, and the lower side of the housing 41 is cooled by the oil flowing down from the upper portion of the housing 41. For example, the oil storage portion 41d is formed below the clutch 48. For example, in the oil storage portion 41d, the oil is stored up to a position higher than the lower end of the core 82. The oil is equivalent to a coolant, and the oil storage portion 41d is equivalent to a coolant storage portion.

[0056] The sprocket 55 is rotatably supported on the intermediate cover 31 via a bush 54. The sprocket 55 is connected to the rotating shaft 44 of the rotating electric machine 40 via a connecting member 56, and the sprocket 55 is also connected to a sprocket 6b provided on the input shaft 6a of the oil pump 6 via a chain 57. Thus, when the rotating electric machine 40 rotates, the oil pump 6 is driven and the oil pressure control valve unit is supplied with oil.

[0057] The bush 54 and the sprocket 55 are provided at positions radially overlapping the pipe 53. "Radially overlapping" means that at least a part thereof is arranged overlappingly when viewed from the radial direction. In addition, as will be described later Figure 4 、 Figure 5 As shown, the chain 57 is arranged in such a way as to pass between one end and the other end of the arc-shaped pipe 53, that is, through the cutout of the pipe 53. Thus, the axial dimension of the power transmission device 10 can be suppressed.

[0058] A protrusion 41e and a protrusion 31a are provided between the sprocket 55 and the pipe 53. The protrusion 41e is provided on the housing 41 and protrudes axially from the housing 41, and the protrusion 31a is provided on the intermediate cover 31 and protrudes axially from the intermediate cover 31. The protrusion 41e and the protrusion 31a overlap radially. The protrusion 41e and the protrusion 31a abut against each other radially. The peripheral portions of the housing 41 and the intermediate cover 31 will be further described later.

[0059] The vehicle 100 is configured as described above, and has, as operation modes: an EV mode in which the rotating electric machine 40 is driven by electric power supplied from a battery and the vehicle travels only by the driving force of the rotating electric machine 40, an engine driving mode in which the vehicle travels only by the driving force of the engine 1, and a HEV mode in which the vehicle travels by the driving force of the engine 1 and the driving force of the rotating electric machine 40.

[0060] In the EV mode, the vehicle 100 releases the clutch 48 and travels by driving the rotating electric machine 40 only by the electric power from the battery in a state where either the forward clutch 30b or the reverse brake 30c is engaged.

[0061] In the engine driving mode, the vehicle 100 travels while only driving the engine 1 with the clutch 48 coupled to either the forward clutch 30b or the reverse brake 30c.

[0062] In the HEV mode, the vehicle 100 travels while driving the engine 1 and the rotating electric machine 40 with the clutch 48 coupled to either the forward clutch 30b or the reverse brake 30c.

[0063] Next, with reference to Figure 2 the structure of the rotating electric machine 40 will be described in detail. Figure 2 is a cross-sectional view of the rotating electric machine 40.

[0064] As Figure 2 shown, the housing 41 has a cylindrical portion 41a provided on the outer peripheral side and a cylindrical portion 41b provided on the inner peripheral side and extending toward the inside of the housing 41. The stator 43 is fixed to the inner periphery of the cylindrical portion 41a. The cylindrical portion 41b rotatably supports the rotating shaft 44 via a bearing 51.

[0065] The stator 43 includes a stator core 431, an insulator 432, and a stator coil 433. The stator core 431 is formed by laminating a plurality of thin electromagnetic steel sheets. The insulator 432 is made of resin, for example, and is provided on the stator core 431 to insulate the stator core 431 and the stator coil 433. The stator coil 433 is wound around the coil winding portion 432a of the insulator 432.

[0066] Figure 3 is a diagram showing the main part of the stator 43. In Figure 3 shows the main part of the stator 43 viewed axially from the side of the pipe 53. A plurality of insulators 432 are provided along the circumferential direction of the rotating electric machine 40. A plurality of convex portions extending radially inward from the annular portion are provided on the stator core 431, and the insulators 432 are mounted on the convex portions. The stator coil 433 is wound around the insulator 432 in a state of being mounted on the stator core 431.

[0067] Returning to Figure 2 , an opening 41c is formed on the surface of the housing 41 opposite to the pipe 53. Thus, as shown by the arrow, the oil discharged from the hole 53a of the pipe 53 is directly blown onto the stator coil 433 through the opening 41c.

[0068] As a result, since the heat-generating stator coil 433 is effectively cooled, the stator 43 can be cooled with high efficiency, and thus, the rotating electric machine 40 can be cooled with high efficiency. The hole 53a corresponds to a coolant supply port.

[0069] The outer peripheral side of the cover 42 is fixed to the housing 12 of the power transmission device 10. Further, the cover 42 has a cylindrical portion 42a provided on the inner peripheral side and extending toward the housing 41 side. The cylindrical portion 42a rotatably supports the input shaft 11 via a bearing 50.

[0070] Between the cylindrical portion 42a and the input shaft 11, a sealing member 59 for preventing oil leakage to the outside is provided.

[0071] Between the input shaft 11 and the rotating shaft 44, a needle bearing 60 for receiving an axial load and a needle bearing 61 for receiving a radial load are provided.

[0072] The clutch disk hub 62 is fixed by welding to the end portion of the input shaft 11 on the forward / backward switching mechanism 30 side. The clutch disk hub 62 has a cylindrical portion 62a provided on the outer peripheral side and extending toward the engine 1. On the outer periphery of the cylindrical portion 62a, a plurality of drive plates 48a of the clutch 48 that can slide freely in the axial direction are mounted by spline engagement.

[0073] The rotor frame 81 is fixed by welding to the outer periphery of the rotating shaft 44. The rotor frame 81 has a cylindrical portion 81a provided on the outer peripheral side. The core 82 is fixed to the outer periphery of the cylindrical portion 81a.

[0074] On the inner periphery of the cylindrical portion 81a, a plurality of driven plates 48b of the clutch 48 that can slide freely in the axial direction are mounted by spline engagement. A holding plate 63 is interposed between the driven plate 48b disposed at the end portion on the side opposite to the piston arm 64 and a ring 65 in a groove fixed to the inner periphery of the cylindrical portion 81a. The axial thickness of the holding plate 63 is thicker than that of the driven plate 48b, preventing the drive plate 48a and the driven plate 48b from falling down.

[0075] When coupling pressure is supplied from the oil pressure control valve unit to the piston oil chamber 66, the piston 67 moves toward the engine 1 side while compressing the return spring 68. The clutch 48 is in a coupled state by the pressing force transmitted from the piston 67 through the needle bearing 69 and the piston arm 64. The needle bearing 69 suppresses the rotation of the piston 67 following the rotation of the piston arm 64.

[0076] Next, use Figure 4 、 Figure 5 to further illustrate the periphery of the housing 41 and the intermediate cover 31 facing the housing 41.

[0077] Figure 4 is a view showing the housing 41 together with the pipe 53. Figure 5 is a view showing the intermediate cover 31 together with the pipe 53 and the chain 57. Figure 4 is a view of the housing 41 as observed from the intermediate cover 31 side, Figure 5 is a view of the intermediate cover 31 as observed from the housing 41 side.

[0078] As shown Figure 4 in FIG. 2, the opening 41c is provided in the upper part of the housing 41. The opening 41c has a long hole shape in the circumferential direction, and a plurality of (here, three) are provided along the circumferential direction. The shape and number of the openings 41c are not limited to this, and may be different shapes and numbers.

[0079] The opening 41c guides the oil discharged from the hole 53a of the pipe 53 into the housing 41. In Figure 4 FIG. 3, the hole 53a is located on the back surface of the pipe 53 and opens as shown Figure 5 in FIG. 4. The hole 53a may be constituted by a nozzle. The oil introduced from the opening 41c shown Figure 4 in FIG. 5 is supplied to the stator 43 housed in the housing 41. The opening 41c corresponds to an inlet.

[0080] The pipe 53 is provided outside the housing 41 and has a cut between one end and the other end. The pipe 53 is an arc-shaped curved pipe. The arc may be a curve that protrudes upward. For example, it may also be an elliptical arc shape.

[0081] A communication port 41g is provided in the lower part of the housing 41. The communication port 41g is combined with the outer shell 12 that houses the housing 41, and communicates the inside of the outer shell of the power transmission device 10 that houses the intermediate cover 31 and the pipe 53 with the oil storage portion 41d.

[0082] The communication port 41g discharges oil from the oil storage portion 41d, and the liquid level height of the oil storage portion 41d is defined by the lower end of the communication port 41g. The liquid level L shown by the dotted line is the liquid level of the oil storage portion 41d defined according to the lower end of the communication port 41g, and represents the liquid level on the side surface of the stator coil 433 on the communication port 41g side.

[0083] As can be seen from the liquid level L, the lower end of the communication port 41g is provided to axially overlap with the stator coil 433. As a result, the liquid level height of the oil storage portion 41d is located on the inner circumferential side relative to the outermost circumferential lower end of the stator coil 433 immersed in the oil in the oil storage portion 41d. As a result, the contact between the stator coil 433 in the oil storage portion 41d and the oil is ensured, and the cooling effect is improved.

[0084] Furthermore, in this case, the intrusion of oil into the air gap of the motor portion of the rotating electric machine 40 (the air gap formed by the gap between the stator 43 and the rotor 80) is suppressed. As a result, in the case of the present embodiment, it is possible to suppress the occurrence of a situation where, when the liquid level height of the oil storage portion 41d is located on the outer circumferential side relative to the outermost circumferential lower end of the stator coil 433 immersed in the oil in the oil storage portion 41d, oil intrudes from the oil storage portion 41d into the air gap and generates a large rotational resistance on the rotor 80. The communication port 41g corresponds to a discharge port.

[0085] As shown Figure 5As shown, the chain 57 extends from the inner peripheral side of the pipe 53 to the outer peripheral side of the pipe 53 through the cutout of the pipe 53. A sprocket 55 for driving the chain 57 is provided on the inner peripheral side of the pipe 53. The sprocket 55 corresponds to a chain wheel.

[0086] As Figure 4 shown, the housing 41 has a recess 41f facing the chain 57. Since the recess 41f avoids interference between the housing 41 and the chain 57, the chain 57 and the sprocket 55 are configured to be close to the housing 41.

[0087] As Figure 4 、 Figure 5 shown, the protrusion 41e and the protrusion 31a are provided to surround the sprocket 55. The protrusion 41e and the protrusion 31a are both formed in an arc shape similar to the pipe 53 and have a cutout between one end and the other end. Therefore, the chain 57 does not interfere with the protrusion 41e and the protrusion 31a.

[0088] Both the protrusion 41e and the protrusion 31a function as covers that suppress oil from flowing down from the pipe 53 and the housing 41 after being discharged from the pipe 53 and injecting it into the sprocket 55. The protrusion 41e corresponds to a housing protrusion, and the protrusion 31a corresponds to a relative component protrusion. The protrusion 41e and the protrusion 31a together constitute a partition wall portion that surrounds the sprocket 55 between the pipe 53 and the sprocket 55.

[0089] Next, the main effects of this embodiment will be described.

[0090] The power transmission device 10 includes: a rotary motor 40, a housing 41 that houses the stator 43 of the rotary motor 40, and a pipe 53 that is provided outside the housing 41 as a coolant supply component having a hole 53a. An opening 41c is provided in the upper part of the housing 41, and the opening 41c guides the oil discharged from the hole 53a. An oil storage portion 41d that forms an oil accumulation is provided in the lower part of the housing 41.

[0091] According to such a structure, since at least the lower side of the housing 41 can be cooled by the oil flowing down from the upper part of the housing 41, the hole 53a on the lower side of the housing 41 can be omitted, thereby reducing the number of holes 53a. Therefore, according to this structure, when at least one or more holes 53a are provided, the number of holes 53a can be reduced. As a result, the number of 53a can be reduced to, for example, the minimum necessary (the effect corresponding to the first aspect of the present invention).

[0092] In this embodiment, the pipe 53 is formed of an arc-shaped pipe. The power transmission device 10 includes a chain 57 that extends from the inner peripheral side of the pipe 53 to the outer peripheral side of the pipe 53 through the cutout of the pipe 53, and a sprocket 55 that is provided on the inner peripheral side of the pipe 53 and drives the chain 57.

[0093] In the present embodiment, a communication port 41g for discharging oil is provided at the lower part of the housing 41. The lower end of the communication port 41g overlaps with the stator coil 433 in the axial direction.

[0094] According to such a structure, the liquid level height of the oil storage portion 41d is located on the inner circumferential side with respect to the outermost circumferential lower end of the stator coil 433 immersed in the oil in the oil storage portion 41d. Therefore, both the cooling property of the stator coil 433 and the suppression of the intrusion of oil into the air gap of the motor portion of the rotating electric machine 40 can be ensured (the effect corresponding to the second aspect of the present invention).

[0095] According to such a configuration, the pipe 53 is not provided over the entire circumference, and thus, the cutout can be increased, and thereby the chain 57 can be extended from the inner circumferential side of the pipe 53 to the outer circumferential side via the cutout. Therefore, the sprocket 55 can be provided so as to overlap the pipe 53 in the radial direction, and thereby, the axial dimension can be reduced (the effect corresponding to the third aspect of the present invention).

[0096] The power transmission device 10 has a protruding portion 41e and a protruding portion 31a as a partition wall portion that surrounds the sprocket 55 between the pipe 53 and the sprocket 55.

[0097] According to such a structure, by injecting the oil flowing down from the pipe 53 and / or the housing 41 into the sprocket 55, an increase in the stirring resistance of the oil in the sprocket 55 can be suppressed (the effect corresponding to the fourth aspect of the present invention).

[0098] In the present embodiment, the partition wall portion is constituted by a protruding portion 41e that protrudes axially from the housing 41.

[0099] According to such a structure, by using the existing housing 41 in the power transmission device 10 to form the partition wall portion, the number of components can be reduced (the effect corresponding to the fifth aspect of the present invention).

[0100] In the present embodiment, the power transmission device 10 has an intermediate cover 31 that faces the housing 41, and the partition wall portion is constituted by a protruding portion 31a that protrudes axially from the intermediate cover 31.

[0101] According to such a structure, by using the existing intermediate cover 31 in the power transmission device 10 to form the partition wall portion, the number of components can be reduced (the effect corresponding to the sixth aspect of the present invention).

[0102] In the present embodiment, the power transmission device 10 has an intermediate cover 31 that faces the housing 41, and the partition wall portion is constituted by the protruding portion 41e and the protruding portion 31a. The protruding portion 41e and the protruding portion 31a overlap in the radial direction.

[0103] According to such a structure, by forming the partition portion in the power transmission device 10 using the existing housing 41 and the intermediate cover 31, the number of components can be reduced. In addition, since the two protrusions, i.e., the protrusion 41e and the protrusion 31a, are used and overlapped in the radial direction, the amount of oil flowing to the sprocket 55 can be further reduced (the effect corresponding to the seventh aspect of the present invention).

[0104] In the present embodiment, the housing 41 has a concave portion 41f facing the chain 57.

[0105] According to such a structure, the chain 57 can be brought closer to the housing 41 side, and the axial length of the power transmission device 10 can be shortened (the effect corresponding to the eighth aspect of the present invention).

[0106] The embodiments of the present invention have been described above, but the above embodiments only show a part of the application examples of the present invention, and are not intended to limit the technical scope of the present invention to the specific configurations of the above embodiments.

[0107] For example, in the above embodiments, the transmission device has been described as the power transmission device 10. However, the transmission device may also be a rotary electric machine mounting device (a device equipped with a rotary electric machine), etc., and the power transmission device 10 may also be regarded as a rotary electric machine mounting device.

[0108] In addition, in the above embodiments, the power transmission device 10 has been described as a transmission. However, the power transmission device 10 may also be a speed reducer, a belt motor transmission (which may also be a rotary electric machine mounting device), a belt motor speed reducer (which may also be a rotary electric machine mounting device), etc.

Claims

1. A transmission device, characterized in that: have: Rotating electric machines; a housing for housing the stator of the rotating electrical machine; a coolant supply component, which is arranged outside the housing and has a coolant supply port, An inlet is provided on the upper portion of the housing to introduce the coolant discharged from the coolant supply port. A coolant storage portion is provided at the lower portion of the housing to form a coolant reservoir. The cooling liquid supply component is composed of an arc tube. The invention comprises: a chain extending from the inner peripheral side of the arc tube to the outer peripheral side of the arc tube through the notch of the arc tube; and a sprocket provided on the inner peripheral side of the arc tube for driving the chain.

2. The transfer device according to claim 1, wherein A discharge port for discharging the coolant is provided at the lower portion of the housing. A lower end of the discharge port overlaps with the coil of the stator in the axial direction.

3. The transfer device according to claim 1, wherein A partition wall portion surrounding the sprocket is provided between the arc-shaped pipe and the sprocket.

4. The transfer device according to claim 3, wherein: The partition wall portion includes a housing protrusion portion that protrudes in the axial direction from the housing.

5. The transfer device according to claim 3, wherein: having an opposing member opposed to the housing, The partition wall portion includes a facing member protruding portion that protrudes in the axial direction from the facing member.

6. The transfer device according to claim 3, wherein: having an opposing member opposed to the housing, The partition wall portion includes a housing protrusion protruding in the axial direction from the housing and an opposing member protrusion protruding in the axial direction from the opposing member. The housing protrusion and the opposing member protrusion overlap in a radial direction.

7. The transfer device according to claim 1, wherein: The housing has a recessed portion facing the chain.

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