device

Abstract

The device of the present application includes: a rotary electric machine; a liquid supply member that supplies a liquid to the rotary electric machine; and an opposing member that opposes the rotary electric machine in an axial direction via the liquid supply member, and supplies the liquid to the liquid supply member via the opposing member.

Description

Technical Field

[0001] This invention relates to a device. Background Technology

[0002] A cooling structure for a rotating motor that supplies cooling oil to the rotating motor using a refrigerant flow pipe is disclosed in Japanese JP2015-211543A.

[0003] In the structure disclosed in Japanese patent JP2015-211543A, by making the supply port side of the refrigerant flow path protrude beyond the outer periphery of the stator, liquids such as cooling oil can be supplied to the refrigerant flow path. Therefore, there is a problem that it is difficult to achieve miniaturization of the entire device, including the rotary motor. Summary of the Invention

[0004] The present invention was made in view of such technical problems, and its object is to realize the miniaturization of a device having a structure for supplying liquid to a rotating motor.

[0005] According to one aspect of the present invention, an apparatus is provided comprising: a rotary motor; a liquid supply member for supplying liquid to the rotary motor; and a counter member that is axially opposed to the rotary motor via the liquid supply member, through which liquid is supplied to the liquid supply member.

[0006] Therefore, liquid can be supplied to the liquid supply component via a component that is axially opposite to the rotary motor, thus preventing the liquid supply component from extending to the outer periphery of the rotary motor. As a result, the device can be miniaturized. Attached Figure Description

[0007] Figure 1 This is a schematic structural diagram of a hybrid vehicle equipped with the device according to an embodiment of the present invention.

[0008] Figure 2 This is a diagram showing the middle cover, tube, and chain as viewed from the side of the rotating motor.

[0009] Figure 3 It is a three-dimensional view of the shell and tubes.

[0010] Figure 4 yes Figure 2 Section IV-IV in the diagram.

[0011] Figure 5 This is a cross-sectional view of a rotary electric machine. Detailed Implementation

[0012] Hereinafter, with reference to the accompanying drawings, a hybrid vehicle (hereinafter referred to as "vehicle") 100 having a power transmission device 10 as an embodiment of the present invention will be described.

[0013] Figure 1 This is a rough structural diagram of vehicle 100. (For example...) Figure 1 As shown, the vehicle 100 includes an engine 1 and a power transmission device 10 disposed on the power transmission path connecting the engine 1 and the drive wheels 5.

[0014] In this embodiment, the power transmission device 10 is a gearbox and includes: a gear shifting mechanism 20, a forward / reverse switching mechanism 30, and a rotary motor 40.

[0015] The rotary motor 40 is positioned between the speed change mechanism 20 and the engine 1 in the power transmission path.

[0016] The rotary motor 40 includes: a housing 41; a cover 42 having an opening on the motor side of the housing 41; a stator 43 having an opening on the inner periphery of the housing 41; a rotating shaft 44; a rotor 80 having an opening on the outer periphery of the rotating shaft 44; a rotation sensor 47 having an opening on the cover 42; and a clutch 48 for engaging (disengaging, connecting) the rotor 80 and the input shaft 11. The rotor 80 has a rotor frame 81 and an iron core 82 having an opening on the outer periphery of the rotor frame 81.

[0017] The rotary motor 40 is fixed to the power transmission device 10 by fastening the cover 42 to the housing 12 of the power transmission device 10 with bolts (not shown).

[0018] The input shaft 11 is rotatably supported on the cover 42 via the bearing 50, and inputs the output rotation of the engine 1. In addition, the rotating shaft 44 is rotatably supported on the housing 41 via the bearing 51.

[0019] Clutch 48 is a normally open hydraulic clutch. Clutch 48 is controlled to engage / disengage by hydraulic pressure regulated by a hydraulic control valve unit (not shown). In this embodiment, clutch 48 is a wet multi-plate clutch, but other clutches may also be used.

[0020] When clutch 48 is engaged, input shaft 11 is directly connected to rotor 80. That is, input shaft 11 is directly connected to rotating shaft 44 and rotates at the same speed.

[0021] The rotation sensor 47 is a sensor that detects at least one of the rotational speed and angle (phase) of the rotary motor 40. In this embodiment, the rotation sensor 47 is a Hall sensor, and a magnet 52, which serves as the detected part of the rotation sensor 47, is mounted on the holding member 49 fixed to the rotor 80.

[0022] Alternatively, the rotation sensor 47 can be any other sensor that detects rotational speed or angle. Furthermore, the magnet 52 can be a permanent magnet, electromagnet, or similar device. When using an electromagnet, current can be supplied to it using a slip ring or similar device.

[0023] The rotary motor 40 can operate as an electric motor that is driven to rotate by receiving power from a storage battery (not shown). Furthermore, the rotary motor 40 functions as a generator when the rotor 80 receives rotational energy from the drive wheel 5, and can charge the storage battery. The structure of the rotary motor 40 will be described in detail later.

[0024] The speed change mechanism 20 includes: a primary pulley 2 and a secondary pulley 3 arranged in a V-groove configuration; and a belt 4 mounted on the V-grooves of the pulleys 2 and 3.

[0025] An engine 1 is coaxially arranged with the primary pulley 2. Between the engine 1 and the primary pulley 2, starting from the side of the engine 1, a rotary motor 40 and a forward / reverse switching mechanism 30 are arranged in sequence.

[0026] The forward / reverse switching mechanism 30 is mainly composed of a double-pinion planetary gear set 30a, whose sun gear is connected to the rotating shaft 44 of the rotary motor 40, and whose planetary gear carrier is connected to the primary pulley 2 of the transmission mechanism 20. The forward / reverse switching mechanism 30 also includes a forward clutch 30b that directly connects the sun gear and planetary gear carrier of the double-pinion planetary gear set 30a, and a reverse brake 30c that fixes the gear ring. Furthermore, when the forward clutch 30b is engaged, the input rotation from the rotating shaft 44 is transmitted to the primary pulley 2 in its original direction of rotation; when the reverse brake 30c is engaged, the input rotation from the rotating shaft 44 is reversed and transmitted to the primary pulley 2.

[0027] When the forward driving mode is selected as the driving mode of the vehicle 100, the forward clutch 30b is engaged by supplying clutch pressure from the hydraulic control valve unit. When the reverse driving mode is selected as the driving mode of the vehicle 100, the reverse brake 30c is engaged by supplying brake pressure from the hydraulic control valve unit.

[0028] 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 wheel 5 via the output shaft 8, the gear set 9 and the differential gear device 15.

[0029] In order 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-groove 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.

[0030] These movable conical plates 2b and 3b exert force on the fixed conical plates 2a and 3a by supplying pressure to the primary pulley and the secondary pulley from the hydraulic control valve unit, thereby causing the belt 4 to engage with the conical plates through friction and thus transmitting power between the primary pulley 2 and the secondary pulley 3.

[0031] During speed change, the pressure difference between the primary pulley pressure and the secondary pulley pressure, which corresponds to the target speed ratio, causes the width of the V-groove of the two pulleys 2 and 3 to change, and the diameter of the coiled arc of belt 4 relative to pulleys 2 and 3 to change continuously, thereby achieving the target speed ratio.

[0032] An arc-shaped pipe 53 serving as a liquid supply component is provided between the rotary motor 40 and the forward / reverse switching mechanism 30, and an intermediate cover 31 serving as a counter component covers the rotary motor 40 side of the forward / reverse switching mechanism 30 and is axially opposite to the rotary motor 40 via the pipe 53.

[0033] The sprocket 55 is rotatably supported on the intermediate cover 31 via the bushing 54. The sprocket 55 is connected to the rotating shaft 44 of the rotary motor 40 via the connecting member 56, and the sprocket 55 is also connected to the sprocket 6b provided on the input shaft 6a of the oil pump 6 via the chain 57. Thus, when the rotary motor 40 rotates, the oil pump 6 is driven to supply oil to the oil pressure control valve unit.

[0034] Figure 2 This is a diagram showing the intermediate cover 31, tube 53, and chain 57 as viewed from the side of the rotating motor 40. Figure 3 This is a perspective view of the shell 41 and the tube 53.

[0035] like Figure 2 , Figure 3 As shown, the tube 53 extends circumferentially along the rotary motor 40 in an upwardly convex curved shape, and has a cutout 53b at the bottom. Figure 2 As shown, multiple holes 53a are provided on the side of the tube 53 on the side of the rotating motor 40. In addition, the shape of the tube 53 can be any upwardly convex curve, such as an arc or an elliptical arc.

[0036] Multiple clamps 34 are mounted on the tube 53. The tube 53 secures these clamps 34 together with the intermediate cover 31 to the outer casing 12.

[0037] Pipe 53 is connected via intermediate component 32 to oil passage 31c located inside intermediate cover 31 (see reference). Figure 4 This causes the oil, which is a liquid supplied from the intermediate cover 31, to be sprayed from multiple holes 53a onto the rotary motor 40. The intermediate component 32 will be described in detail later.

[0038] like Figure 3 As shown, multiple holes 41c are formed circumferentially on the surface of the housing 41 opposite to the intermediate cover 31. Oil sprayed from the multiple holes 53a of the pipe 53 is directly sprayed onto the coils of the stator 43 through the multiple holes 41c. Thus, oil can be supplied to the rotary motor 40 from above, enabling efficient cooling of the rotary motor 40. In addition, the shape and number of holes 41c can be appropriately changed.

[0039] Thus, in this embodiment, since oil can be supplied to the pipe 53 via the intermediate cover 31 which is axially opposite to the rotary motor 40, the pipe 53 can be prevented from protruding to the outer periphery of the rotary motor 40 when viewed axially. Therefore, the power transmission device 10 can be miniaturized. In addition, when viewed axially, the pipe 53 can also be prevented from protruding from the outer periphery of the rotary motor 40, which is more preferable from the viewpoint of miniaturizing the power transmission device 10.

[0040] Furthermore, by employing a structure that supplies oil from the intermediate cover 31 to the pipe 53 via the intermediate component 32, the orientation of the oil passage can be changed using the intermediate component 32. In other words, the intermediate component 32 has at least a first oil passage and a second oil passage intersecting the first oil passage. Therefore, for example, it is not necessary to bend the pipe 53 in the middle, and a simple shape can be formed, thereby increasing the design freedom of various components. Moreover, by increasing the design freedom of various components, miniaturization of the power transmission device 10 becomes easier.

[0041] In addition, in this embodiment, such as Figure 1 As shown, bushing 54, sprocket 55, and chain 57 are positioned radially overlapping with tube 53, as... Figure 2 As shown, the chain 57 is configured to extend from the inner circumference of the arc-shaped tube 53 through the cutout 53b of the tube 53 to the outer circumference of the tube 53. "Overlapping in the radial direction" means that the chains are configured to overlap at least partially when viewed from the radial direction.

[0042] As described above, the pipe 53 supplies oil to the upper side of the rotary motor 40. Therefore, it is not necessary to provide the pipe 53 around the entire circumference. That is, the cut portion 53b of the pipe 53 can be increased. As a result, the chain 57 can be arranged through the cut portion 53b, and a portion of the chain 57 and the sprocket 55, etc., can be arranged on the inner circumference of the pipe 53. Therefore, the overall size of the power transmission device 10 can be reduced.

[0043] In addition, such as Figure 2 As shown, the intermediate cover 31 has an arcuate rib 31a arranged along the tube 53, such as Figure 3 As shown, the housing 41 has an arcuate rib 41d arranged along the tube 53.

[0044] The ribs 31a of the intermediate cover 31 and 41d of the housing 41 are configured such that, with the rotary motor 40 assembled on the housing 12, rib 31a fits inside rib 41d. Thus, ribs 31a and 41d constitute a partition 35 that separates the tube 53 from the chain 57 in a manner that surrounds the chain 57 (see reference). Figure 5 ).

[0045] This prevents oil flowing from pipe 53 or housing 41 from adhering to chain 57, and prevents the driving efficiency of chain 57 from decreasing due to the stirring resistance of oil.

[0046] The vehicle 100 is configured as described above and has the following driving modes: EV mode, in which the vehicle travels solely by the driving force of the rotary motor 40 driven by electricity supplied from the battery; engine driving mode, in which the vehicle travels solely by the driving force of the engine 1; and HEV mode, in which the vehicle travels by the driving force of the engine 1 and the driving force of the rotary motor 40.

[0047] In EV mode, the vehicle 100 drives the rotary motor 40 solely by power from the battery, with the clutch 48 released and either the forward clutch 30b or the reverse brake 30c engaged.

[0048] In engine driving mode, the vehicle 100 drives by driving only the engine 1 while the clutch 48 is engaged with either the forward clutch 30b or the reverse brake 30c.

[0049] In HEV mode, the vehicle 100 drives the engine 1 and the rotary motor 40 while the clutch 48 is engaged with either the forward clutch 30b or the reverse brake 30c.

[0050] Next, refer to Figure 4 The intermediate component 32 is described in detail. Figure 4 yes Figure 2 Section IV-IV in the diagram.

[0051] The intermediate component 32 has: a limiting portion 32a that abuts against the surface of the intermediate cover 31; a sealing ring groove 32b that is adjacent to the limiting portion 32a and holds the sealing ring 33; a flange-shaped front end portion 32c that is adjacent to the sealing ring groove 32b; a pipe hole 32d into which the supply pipe 53 is inserted; an oil passage 32e that serves as a first oil passage with one end open on the bottom surface of the pipe hole 32d; and an oil passage 32f that serves as a second oil passage with one end connected to the oil passage 32e and the other end open on the end face of the front end portion 32c.

[0052] The tube 53 is inserted into the tube hole 32d and fixed to the intermediate component 32, for example, by brazing or welding. Alternatively, the tube 53 can be fixed in the tube hole 32d by pressing. The sealing ring 33 is, for example, an O-ring.

[0053] The intermediate component 32 is inserted into the intermediate cover 31. Specifically, with its front end 32c inserted into the receiving hole 31b of the intermediate cover 31, the intermediate component 32 is fastened together with the intermediate cover 31 and fixed to the outer casing 12.

[0054] With the intermediate component 32 mounted on the intermediate cover 31, as follows Figure 4 As shown, the limiting part 32a abuts against the surface of the intermediate cover 31, and the front end part 32c is positioned to be housed in the receiving hole 31b. "The front end part 32c is housed in the receiving hole 31b" means that at least a portion of the front end part 32c is housed in the receiving hole 31b. Therefore, the sealing ring 33 is held in position abutting against the inner wall of the receiving hole 31b, thus ensuring a tight seal between the intermediate cover 31 and the intermediate component 32.

[0055] For example, it is also possible to retain the sealing ring 33 by providing countersunk holes or the like on the intermediate cover 31, but in this case, the axial length of the structure retaining the sealing ring 33 becomes larger. Therefore, as a result, the axial length, i.e., the thickness, of the intermediate cover 31 becomes larger. In contrast, by providing the front end portion 32c of retaining the sealing ring 33 on the intermediate component 32, the thickness of the intermediate cover 31 can be reduced.

[0056] Furthermore, in this embodiment, the sealing surface 31d in the receiving hole 31b of the intermediate cover 31, which abuts against the sealing ring 33, is formed into a cone shape that extends toward the intermediate component 32. That is, the sealing surface 31d is an inclined surface.

[0057] From the viewpoint of installability of the sealing ring 33, it is considered to provide an inclined surface at the inlet portion of the receiving hole 31b. However, if only the inlet portion is inclined, a boundary will exist between the inclined surface and the sealing surface, which may damage the sealing ring 33 during installation. Therefore, as Figure 4 As shown, it is preferable to make not only the inlet portion, but also the entire portion from the inlet portion to the sealing ring 33 abutting as an inclined surface.

[0058] Next, refer to Figure 5 The structure of the rotary motor 40 is described in detail. Figure 5 This is a cross-sectional view of the rotary motor 40.

[0059] The housing 41 has: a cylindrical portion 41a disposed on the outer peripheral side, a cylindrical portion 41b disposed on the inner peripheral side and extending into the inner side of the housing 41, a plurality of holes 41c and ribs 41d.

[0060] A stator 43 is fixed to the inner circumference of the cylindrical portion 41a. The cylindrical portion 41b rotatably supports the rotating shaft 44 via a bearing 51.

[0061] Rib 41d together with rib 31a of intermediate cover 31 forms partition 35 that separates tube 53 from chain 57.

[0062] Multiple holes 41c are formed on the surface of the housing 41 opposite to the tube 53. Thus, as indicated by the arrows, oil ejected from the multiple holes 53a of the tube 53 is directly sprayed onto the coil of the stator 43 through the multiple holes 41c.

[0063] The outer periphery of the cover 42 is fixed to the housing 12 of the power transmission device 10. In addition, the cover 42 has a cylindrical portion 42a provided on the inner periphery and extending toward the housing 41.

[0064] A bracket 58 housing the rotation sensor 47 is fixed to the outer periphery of the cylindrical portion 42a. In addition, the cylindrical portion 42a rotatably supports the input shaft 11 via a bearing 50.

[0065] The bracket 58 has: an annular portion 58a that holds the rotation sensor 47 inside; a support portion 58b that extends radially from the annular portion 58a; and a conversion portion 58c that is disposed at the front end of the support portion 58b.

[0066] The wire 70 connected to the rotation sensor 47 has a thin film portion 70a and a cable 70b. The thin film portion 70a and the cable 70b are wired together in the conversion section 58c.

[0067] A thin film portion 70a is disposed on a flexible printed circuit board 70c fixed to a support portion 58b.

[0068] The bracket 58 is mounted on the cover 42 by inserting the cylindrical portion 42a of the cover 42 into the annular portion 58a.

[0069] Thus, the bracket 58 is axially adjacent to the rotor 80 and the retaining member 49, etc. "Axially adjacent" means that the two parts are arranged adjacent to each other in the axial direction without passing through other parts. The two parts can be in contact or separated by a gap.

[0070] On the outer periphery of the cylindrical portion 42a, further from the front end of the support 58, a ring 71 is provided, overlapping the annular portion 58a in the axial direction and fixed to the groove. "Overlapping in the axial direction" means that they are arranged in a manner that at least partially overlaps when viewed from the axial direction. Therefore, the movement of the support 58 toward the front end of the cylindrical portion 42a is restricted by the ring 71. This prevents the support 58 from detaching from the cylindrical portion 42a.

[0071] Furthermore, a groove 42b extending radially from the base end of the cylindrical portion 42a is formed on the cover 42. A support portion 58b of the bracket 58 is formed along the inner wall of the cover 42, and when the bracket 58 is mounted on the cover 42, the support portion 58b is embedded in the groove 42b. Thus, by receiving the radially extending support portion 58b in the radially extending groove 42b, circumferential rotation of the bracket 58 can be restricted. Additionally, compared to the case where the groove 42b is not provided on the cover 42, the axial distance between the cover 42 and rotating bodies such as the rotor 80 or the retaining member 49 can be brought closer.

[0072] Furthermore, there is no limitation as long as the rotating body is a rotating object. For example, the holding member 49 of the magnet 52, which is the detected part of the rotation sensor 47, the clutch 48, and the rotor 80 of the rotary motor 40 are rotating bodies.

[0073] A sealing component 59 is provided between the cylindrical portion 42a and the input shaft 11 to prevent oil from leaking to the outside.

[0074] A needle roller bearing 60 for bearing axial load and a needle roller bearing 61 for bearing radial load are provided between the input shaft 11 and the rotating shaft 44.

[0075] A clutch hub 62 is welded to the end of the input shaft 11 on the side of the forward / reverse switching mechanism 30. The clutch hub 62 has a cylindrical portion 62a disposed on the outer periphery and extending toward the engine 1. On the outer periphery of the cylindrical portion 62a, a plurality of drive discs 48a of the clutch 48 are slidably mounted axially by spline engagement.

[0076] A rotor frame 81 is fixed to the outer periphery of the rotating shaft 44 by welding. The rotor frame 81 has a cylindrical portion 81a disposed on the outer periphery. An iron core 82 is fixed to the outer periphery of the cylindrical portion 81a.

[0077] On the inner circumference of the cylindrical portion 81a, a plurality of driven discs 48b of the clutch 48 are axially slidably mounted via spline connection. A fixing plate 63 is mounted between the driven discs 48b and a ring 65, the driven discs 48b being positioned at the end opposite to the piston arm 64, and the ring 65 being fixed in a groove on the inner circumference of the cylindrical portion 81a. The axial thickness of the fixing plate 63 is greater than that of the driven discs 48b to prevent the drive discs 48a and 48b from tipping over.

[0078] If a coupling pressure is supplied from the hydraulic control valve unit to the piston oil chamber 66, the piston 67 compresses the return spring 68 and moves toward the engine 1 side. The clutch 48 is engaged by the thrust transmitted from the piston 67 via the needle roller bearing 69 and the piston arm 64.

[0079] In addition, the needle roller bearing 69 prevents the piston 67 from rotating in tandem with the piston arm 64.

[0080] Additionally, a retaining component 49 for retaining the magnet 52 is mounted on the rotor frame 81.

[0081] The retaining member 49 is press-fitted to the outer periphery of the cylindrical portion 81a via a press-fit portion 49a provided on the outer periphery. Alternatively, the retaining member 49 may be configured to be fixed to the fixing plate 63 by press-fitting or welding.

[0082] Additionally, the retaining member 49 has a cylindrical portion 49b located on its inner circumference and extending toward the forward / reverse switching mechanism 30. The cylindrical portion 49b is situated between the radially positioned clutch hub 62 and the rotation sensor 47 held by the bracket 58, and a magnet 52 is mounted on its inner circumference. Alternatively, the magnet 52 may be configured to be held on another rotating body instead of the retaining member 49.

[0083] As described above, the power transmission device 10 of this embodiment includes: a rotary motor 40, a pipe 53 for supplying oil to the rotary motor 40, and an intermediate cover 31 that is axially opposite to the rotary motor 40 via the pipe 53, through which oil is supplied to the pipe 53 via the intermediate cover 31.

[0084] Therefore, oil can be supplied to the pipe 53 via the intermediate cover 31, which is axially opposite to the rotary motor 40, thus preventing the pipe 53 from protruding to the outer periphery of the rotary motor 40 when viewed from the axial direction. As a result, the power transmission device 10 can be miniaturized.

[0085] In addition, the power transmission device 10 has an intermediate component 32 connected to the intermediate cover 31, and the pipe 53 is connected to the intermediate component 32.

[0086] Thus, by forming a structure that supplies oil from the intermediate cover 31 to the pipe 53 via the intermediate component 32, the orientation of the oil passage can be changed using the intermediate component 32. In other words, the intermediate component 32 has at least a first oil passage and a second oil passage intersecting the first oil passage. Therefore, for example, it is not necessary to bend the pipe 53 in the middle, and a simple shape can be formed, which can increase the design freedom of various components. Moreover, by increasing the design freedom of various components, miniaturization of the power transmission device 10 becomes easier.

[0087] Additionally, the power transmission device 10 has a sealing ring 33 that seals between the intermediate cover 31 and the intermediate component 32. The intermediate component 32 has: a limiting portion 32a that abuts against the surface of the intermediate cover 31; a sealing ring groove 32b that is adjacent to the limiting portion 32a and holds the sealing ring 33; and a front end portion 32c that is adjacent to the sealing ring groove 32b. The intermediate cover 31 has a receiving hole 31b for receiving the sealing ring 33, and the front end portion 32c is received in the receiving hole 31b.

[0088] For example, it is also possible to retain the sealing ring 33 by providing countersunk holes or the like on the intermediate cover 31, but in this case, the axial length of the structure retaining the sealing ring 33 becomes larger. Therefore, as a result, the axial length, i.e., the thickness, of the intermediate cover 31 becomes larger. In contrast, by providing the front end portion 32c of retaining the sealing ring 33 on the intermediate component 32, the thickness of the intermediate cover 31 can be reduced.

[0089] In addition, the sealing surface 31d in the inner wall of the receiving hole 31b that abuts against the sealing ring 33 is an inclined surface.

[0090] Therefore, not only the inlet portion of the receiving hole 31b, but also the entire surface up to the sealing surface 31d that abuts against the sealing ring 33 becomes an inclined surface, thus preventing damage to the sealing ring 33 when it is installed.

[0091] In addition, the tube 53 is arc-shaped, and the power transmission device 10 has a chain 57 extending from the inner circumference of the tube 53 through the cut portion 53b of the tube 53 to the outer circumference of the tube 53.

[0092] Since it is not necessary to install the tube 53 around the entire circumference, the cut portion 53b of the tube 53 can be increased. Therefore, the chain 57 can be arranged via the cut portion 53b, and a portion of the chain 57 and the sprocket 55, etc., can be arranged on the inner circumference of the tube 53. Thus, the overall size of the power transmission device 10 can be reduced.

[0093] In addition, the power transmission device 10 includes a partition 35 that is provided between the tube 53 and the chain 57 in a manner that surrounds the chain 57.

[0094] This prevents oil flowing from pipe 53 or housing 41 from adhering to chain 57, and prevents the driving efficiency of chain 57 from decreasing due to the stirring resistance of oil.

[0095] The embodiments of the present invention have been described above. However, the above embodiments are merely one example of the application of the present invention and are not intended to limit the technical scope of the present invention to the specific structure of the above embodiments.

[0096] For example, in the above embodiment, the device was described as a power transmission device 10. However, the device may also be a rotary motor mounting device (a device that mounts a rotary motor), and the power transmission device 10 may also be understood as a rotary motor mounting device.

[0097] Furthermore, in the above embodiment, the power transmission device 10 was described as a gearbox. However, the power transmission device 10 may also be a reducer, a gearbox with an electric motor (which is also a rotary motor mounting device), a reducer with an electric motor (which is also a rotary motor mounting device), etc.

[0098] Furthermore, in the above embodiment, the case where the liquid supplied to the rotary motor 40 is oil has been described. However, the liquid supplied to the rotary motor 40 may also be, for example, water or an aqueous solution.

[0099] This invention claims priority based on Japanese Patent Application No. 2020-21657 filed with the Japan Patent Office on February 12, 2020, the entire contents of which are incorporated herein by reference.

Claims

1. An apparatus comprising: Rotary electric motor; A liquid supply component that supplies liquid to the rotary motor; The opposing component is axially opposite the rotary motor via the liquid supply component. Liquid is supplied to the liquid supply component via the opposing component. The liquid supply component is an arc-shaped tube. The device also includes a chain that extends from the inner circumference of the tube, through a cut in the tube, to the outer circumference of the tube. There is also a partition wall between the tube and the chain, which is arranged to surround the chain.

2. The apparatus of claim 1, wherein, It also includes an intermediate component that connects to the opposing component. The liquid supply component is connected to the intermediate component.

3. The apparatus of claim 2, wherein, It also includes a sealing ring for sealing the relative component and the intermediate component. The intermediate component has: A limiting part that abuts against the surface of the opposing component; A sealing ring groove that abuts against the limiting portion and retains the sealing ring; The front end is adjacent to the sealing ring groove. The opposing component has a receiving hole for receiving the sealing ring. The front end is housed in the receiving hole.

4. The apparatus of claim 3, wherein, The sealing surface in the inner wall of the receiving hole that abuts against the sealing ring is an inclined surface.

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