JP2017099281A - Water-cooled motor structure and housing for water cooling - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water-cooled motor structure of which the components are easily manufactured and which improves cooling efficiency, and a housing for water cooling.SOLUTION: The housing for water cooling comprises: a tubular flow passage part 20 which includes a plurality of partition walls erected at predetermined angle intervals and in a center axis direction on a substantially cylindrical inner wall and with which a plurality of outbound flow passages and a plurality of in-bound flow passages extending in parallel with each other along a central axis are formed between the plurality of partition walls and an outer peripheral surface of a motor 40; a first cover part 10 which includes a first opening and includes a plurality of return flow passages each connecting the in-bound flow passage to a subsequent out-bound flow passage; a second cover part 30 which closes a second opening of the tubular flow passage 20 and includes a plurality of return flow passages each connecting an out-bound flow passage to a subsequent in-bound flow passage; a water supply part 16a which is provided in the first cover part 10 and connected to an inlet of a first out-bound flow passage among the plurality of flow passages in the tubular flow passage part 20; and a water drain part 17a which is connected to an outlet of a final in-bound flow passage of the first cover part 10 or connected to an outlet of a final out-bound flow passage of the second cover part 30.SELECTED DRAWING: Figure 12

Description

  The present invention relates to a water cooling motor structure and a water cooling housing that are easy to manufacture and have a high cooling capacity.

  In a small and high output motor (electric motor), heat generated during the operation cannot be ignored, and in some cases, problems such as burnout of the motor winding occur.

  Conventionally, as a water cooling structure for a motor, a motor cooling device has been proposed in which a cooling water flow path is provided in a space between an inner cylinder and an outer cylinder of a cylindrical frame in which a stator and a rotor are fitted (Patent Document 1). In this apparatus, a plurality of partition plates are provided in the cooling water flow path along the axial direction of the cylindrical frame, and the cooling water supplied from the cooling water inlet pipe is supplied to one end side and the other end side of the cylindrical frame. It has the structure which guides toward a cooling water exit pipe | tube, changing a direction alternately between. Similar configurations are also disclosed in Patent Documents 2 and 3.

JP-A-1-136540 Japanese Utility Model Publication No. 5-88185 JP 2007-143246 A

  In the above prior art, a configuration is realized in which the cooling water supplied from the cooling water inlet pipe is guided toward the cooling water outlet pipe while alternately changing the direction between the one end side and the other end side of the cylindrical frame. In order to do this, the partition extending in the axial direction that partitions the space between the inner cylinder and the outer cylinder is configured to retreat alternately on one end side and the other end side of the frame. With this structure, the retreated part of the partition at one end and the other end of the cylindrical frame functions as a cooling water return channel.

  The cylindrical frame has a structure in which an inner cylinder, an outer cylinder, and a partition that partitions a space therebetween are integrated. Such a frame structure is formed by casting using a mold in the apparatuses described in Patent Documents 2 and 3.

  The conventional motor water cooling structure as described above has a disadvantage that it cannot be applied to an existing motor because the motor frame itself must have a special structure.

  In addition, the structure of the motor frame is not easy to manufacture by a manufacturing method such as cutting or extrusion molding because the cross-sectional shape of the cooling water flow path is not constant.

  The present invention has been made in such a background, and an object of the present invention is to provide a water-cooling motor structure and a water-cooling housing that are easy to manufacture parts and have high cooling efficiency.

  A water-cooled motor structure according to the present invention is a water-cooled motor structure that includes a water-cooling housing that houses a motor, and that cools the motor with cooling water that flows through the water-cooling housing. The water-cooling housing has a substantially cylindrical inner wall. A plurality of forward walls extending in parallel with each other along the central axis between the plurality of partition walls and the outer peripheral surface of the motor. A cylindrical flow path portion in which a plurality of return flow paths are formed, and a first opening of the cylindrical flow path section are closed, and the return flow path of the cylindrical flow path portion is connected to a subsequent forward flow path. A plurality of first lid portions having a plurality of folded flow passages and a second opening of the cylindrical flow passage portion, and a plurality of connecting the forward flow passage of the cylindrical flow passage portion to a subsequent return flow passage. A second lid portion having a return channel, and provided in the first lid portion; A water supply unit connected to an inlet of a first forward channel among the plurality of channels of the cylindrical channel unit, and an outlet of a final return channel of the first lid, or And a drainage portion connected to the outlet of the last forward flow path of the second lid portion.

  Each of the plurality of forward channels and the plurality of return channels is defined by an inner wall and a partition wall of the cylindrical channel portion and an outer peripheral surface (outer wall) of the motor in a state where the motor is accommodated in a water cooling housing. Composed.

  The cross-sectional shape of the inner wall of the cylindrical flow path portion is typically the same at an arbitrary position from one end to the other end in the axial direction.

  The folded flow path provided in the first and second lid parts is constituted by a cavity that connects two adjacent flow paths of the cylindrical flow path part provided inside the lid part. That is, the connection between the adjacent forward flow path and the return flow path is realized by the folded flow paths provided in the first and second lid portions.

  A water supply part that receives the supply of cooling water from the outside and flows to the water cooling housing and a drainage part that discharges the cooling water that has passed through the water cooling housing to the outside can be provided in the first lid part. Alternatively, a water supply part that receives supply of cooling water from the outside and flows to the water cooling housing is provided in the first lid part, and a drainage part that discharges the cooling water that has passed through the water cooling housing to the outside is provided in the second lid. It can also be provided on the lid.

  The water cooling housing includes first and second spaces connected to each other in parallel, corresponding to the first and second motors, and the pair of the water supply portion and the drainage portion are the first and second spaces. The cooling water that is shared by the two spaces and supplied to the water supply section flows through the plurality of flow paths in the first space, and then flows through the plurality of flow paths in the second space. It may be discharged from the section.

  A water-cooling housing according to the present invention is a water-cooling housing that houses a motor and cools the motor with cooling water, and has a plurality of partition walls standing upright in the central axis direction at predetermined angular intervals on a substantially cylindrical inner wall. A cylindrical flow path portion having a plurality of forward flow paths and a plurality of return flow paths formed in parallel with each other along the central axis between the plurality of partition walls and the outer peripheral surface of the motor; A first lid portion having a plurality of folded flow passages for closing the opening of 1 and connecting the return flow passage of the cylindrical flow passage portion to the subsequent forward flow passage; and the second lid of the cylindrical flow passage portion. A second lid portion having a plurality of folded flow paths for closing the opening and connecting the forward flow path of the cylindrical flow path section to a subsequent return flow path; and the first lid section, A water supply unit connected to an inlet of a first forward channel among the plurality of channels of the channel-shaped channel unit; Leading to the outlet of the last recovery flow path of the lid, or is obtained by a drainage unit leading to the exit of the last outward passage of said second lid.

  ADVANTAGE OF THE INVENTION According to this invention, manufacture of the components of a water cooling motor structure is easy, and the water cooling motor structure and the water cooling housing with sufficient cooling efficiency are provided.

It is a perspective view of the motor water cooling structure by embodiment of this invention. It is the perspective view which looked at the motor water cooling structure by embodiment of this invention from another angle. It is a figure which shows the example of an external appearance of the motor by embodiment of this invention. It is the front view which looked at the cylindrical flow-path part by embodiment of this invention from the axial direction, and the perspective view seen from diagonally outward. It is the front view which looked at the 1st cover part by an embodiment of the present invention from the axial direction inner side, its AA arrow sectional view, and the perspective view seen from the slanting inner side. It is the front view which looked at the 2nd cover part by an embodiment of the present invention from the axial direction inner side, its AA arrow sectional view, and the perspective view seen from the slanting inner side. It is the front view of the state which accommodated the motor by the embodiment of this invention in the housing, and its BB arrow sectional drawing. It is the perspective view which cut | disconnected the 1st cover part in embodiment of this invention by the plane orthogonal to the shaft of a motor. FIG. 3 is a perspective view of a first lid portion side portion of the motor water cooling structure shown in FIG. 2, in which a cylindrical flow path portion is cut along a plane orthogonal to a motor shaft. FIG. 3 is a perspective view of a cylindrical flow path side portion of the motor water cooling structure shown in FIG. 2, in which a second lid is cut along a plane orthogonal to the motor shaft. It is the perspective view which looked at the 2nd cover part cut | disconnected in FIG. 9 from the inner side. It is a figure corresponding to Drawing 8, Drawing 9, and Drawing 10, and showing the flow of the cooling water in the motor cooling structure of this embodiment. It is a figure which shows the external appearance of the application example of embodiment of this invention. It is the perspective view cut and shown in three places of the application example of FIG.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the drawings.

  1 and 2 are perspective views of the motor water cooling structure according to the present embodiment as seen from different angles.

  In this motor water cooling structure, the motor 40 is housed in a water cooling housing 100. In FIG. 1 and FIG. 2, the rotating shaft 43 and the end cover 42 of the motor 40 are seen exposed from the housing 100. The housing 100 is roughly divided into a central cylindrical flow path portion 20 and a first lid portion 10 and a second lid portion 30 coupled to both ends thereof. The cylindrical flow path part 20, the 1st cover part 10, and the 2nd cover part 30 can be manufactured with the arbitrary materials which have rigidity of materials, such as a metal, a polymer, and ceramics.

  The cylindrical flow path portion 20 has a substantially cylindrical shape, and has a plurality of partition walls standing upright in the central axis direction at a predetermined angular interval on the substantially cylindrical inner wall. A plurality of forward passages and a plurality of return passages extending in parallel with each other along the central axis of the cylinder are formed between the outer peripheral surface of the motor. In this specification, the “outward flow path” refers to a flow path for flowing cooling water from the lid side with a water supply pipe, which will be described later, to the other lid, and a flow path for flowing cooling water in the opposite direction. This is called “return channel”. These flow paths can also be grasped as a plurality of concave grooves formed in the cylindrical inner wall and extending in parallel with each other along the central axis.

  The first lid 10 closes the first opening of the cylindrical channel 20 and has a plurality of folded channels that connect the return channel of the cylindrical channel 20 to the subsequent forward channel. In the present embodiment, the first lid portion 10 flows through the water supply pipe 16 a (water supply portion) that receives cooling water (liquid) from the outside and supplies it to the cylindrical flow passage portion 20, and the cylindrical flow passage portion 20. And a drain pipe 17a (drainage part) for discharging the cooling water to the outside.

  The water supply pipe 16 a is provided in the first lid portion 10 and is connected to the inlet of the first forward flow path among the plurality of flow paths of the cylindrical flow path section 20.

  The drain pipe 17 a is connected to the outlet of the last return channel of the first lid 10. Although not shown, instead of this, the drain pipe 17a may be provided in the second lid portion 30 so as to be connected to the outlet of the last forward flow path of the second lid portion 30.

  The second lid portion 30 has a substantially donut shape, and the second opening of the cylindrical flow passage portion 20 is formed with the shaft 43 and the cover 42 of the motor 40 protruding from the opening 35 (FIG. 2). A plurality of folded flow paths are provided for closing and connecting the forward flow path of the tubular flow path section 20 to the subsequent return flow path over the entire inner periphery.

  Although not particularly limited, wiring (cable) for supplying power to the motor 40 is led out from the end cover 42 to the outside.

  FIG. 3 shows an example of the appearance of the motor 40. The housing 100 is configured according to the outer shape of the motor 40. A rotating shaft 43 projects from one end of a substantially cylindrical motor 40. A plurality of (four in this example) screw grooves 44 are provided on the surface from which the shaft 43 protrudes. As shown in FIG. 1, a screw (not shown) is screwed into the screw groove 44 of the motor 40 from the screw hole 18 provided on the outer plane of the first lid 10, so that the lid 10 is It is fixed to the motor 40. A screw hole 19 is also provided on the curved side surface of the lid 10. A screw is screwed into the screw groove 46 provided on the outer periphery of the motor 40 from the screw hole 19. The fixing of the lid 10 to the motor 40 with these screws is an example of a fixing means, and is not limited thereto. The end cover 42 is fixed in a state where one end thereof is in contact with the end 47 of the motor 40.

  4 (a) and 4 (b) are a front view of the cylindrical flow channel portion 20 viewed from the axial direction and a perspective view of the cylindrical flow channel portion 20 viewed obliquely from the outside.

  As can be seen from this figure, the cylindrical flow path portion 20 is provided with partition walls 21 to 28 extending in the axial direction at predetermined intervals on the inner wall of the cylindrical main body so as to stand upright toward the center of the cylinder. A broken-line circle 29 shown in FIG. 4A indicates a cylindrical space corresponding to the outer peripheral shape of the motor 40. When the motor 40 is accommodated in the cylindrical flow path portion 20, the free ends of the partition walls 21 to 28 are configured to contact the outer peripheral surface of the motor 40. With this configuration, a plurality (eight in this example) of flow paths 21a to 28a are formed by the substantially cylindrical inner wall of the cylindrical flow path portion 20, the partition walls 21 to 28, and the outer wall (outer peripheral surface) of the motor 40. Is done. The partition walls 21 to 28 are all the same size and have the same plate shape. In order to cool the outer peripheral surface of the motor 40 evenly, it is preferable to make the thickness of the partition wall separating the adjacent flow paths as thin as possible. Basically, by making the size of the flow paths 21a to 28a, that is, the cross-sectional area or the circumferential angle all constant, the cooling water can be made to flow uniformly and stably in each flow path.

  However, in the present embodiment, temperature sensors (not shown) are arranged in the flow path 21a connected to the water supply pipe 16a of the housing 100 and the flow path 28a connected to the drain pipe 17a, and the resistance is taken into consideration. Thus, the cross-sectional areas of both flow paths are larger than the cross-sectional areas of the other flow paths. One of the two temperature sensors is a spare sensor.

  5A, 5B, and 5C are a front view of the first lid 10 viewed from the axially inner side, a cross-sectional view taken along the line AA, and a perspective view viewed from the obliquely inner side. Note that FIG. 1 is upside down.

  The first lid portion 10 is joined to the one end of the cylindrical flow path portion 20 so as to cover the opening at one end of the cylindrical flow path portion 20. In other words, the cylindrical end portions of the cylindrical flow path portion 20 are connected so as to be fitted to the shoulder portions 10a formed at the end portions of the lid portion 10 in a state where the rotation angles thereof are matched. This connection is performed using a water-resistant adhesive in this embodiment. The connection method is not limited to the adhesive, and any conventional means can be used. The watertightness may be maintained using an elastic packing or the like.

  The lid 10 has a water supply port 16 to which a water supply pipe 16a is connected and a drainage port 17 to which a drain pipe 17a is connected on its side.

  The lid portion 10 has partition walls 11, 12, 13, 14, and 15 that correspond to the partition walls 21, 22, 24, 26, and 28 of the cylindrical flow path portion 20, respectively. These partition walls 11 to 15 stand upright in the central axis direction at predetermined angular intervals on the inner wall of the annular cavity of the lid 10. When the motor is accommodated in the housing 100, the free ends of the partition walls 11 to 15 are configured to contact the outer peripheral surface of the motor 40. In the lid 10, a water supply chamber 11 a is formed between the partition wall 11 and the partition wall 12. A water supply port 16 is opened from the water supply chamber 11a to the outside. The water supply chamber 11a corresponds to the first flow path 21a of the cylindrical flow path section 20, and guides the cooling water supplied from the water supply pipe 16a to the flow path 21a. The water supply chamber 11 also constitutes a part of the entire flow path of the cooling housing 100.

  A folded channel 12 a is formed between the partition wall 12 and the partition wall 13. The “folding flow path” is configured by a cavity that connects two adjacent flow paths of the cylindrical flow path portion 20 provided inside the lid portion 10. The return flow path 12a faces the flow paths 22a and 23a of the cylindrical flow path portion 20, and guides the cooling water flowing from the flow path 22a to be turned back to the flow path 23a.

  A folded flow path 13 a is formed between the partition wall 13 and the partition wall 14. The folded flow path 13a is opposed to the flow paths 24a and 25a of the cylindrical flow path section 20, and guides the cooling water flowing from the flow path 24a to be folded back to the flow path 25a.

  A folded channel 14 a is formed between the partition wall 14 and the partition wall 15. The folded flow path 14a is opposed to the flow paths 26a and 27a of the cylindrical flow path portion 20, and guides the cooling water flowing from the flow path 26a to be folded back to the flow path 27a.

  A drainage chamber 15 a is formed between the partition wall 15 and the partition wall 11. A drain port 17 is opened from the drain chamber 15a to the outside. The drain chamber 15a also constitutes a part of the entire flow path of the cooling housing 100.

  6A, 6B, and 6C are a front view of the second lid 30 viewed from the inside in the axial direction, a cross-sectional view taken along the line AA, and a perspective view viewed from the oblique inner side.

  The second lid portion 30 is joined to the cylindrical flow path portion 20 so as to cover the opening at the other end of the cylindrical flow path portion 20. That is, the cylindrical end portions of the cylindrical flow path portion 20 are connected so as to be fitted to the shoulder portions 30a formed at the end portions of the lid portion 30 in a state where the rotation angles thereof are matched. This connection is performed using a water-resistant adhesive in this embodiment. The connection method is not limited to the adhesive, and any conventional means can be used. The watertightness may be maintained using an elastic packing or the like.

  Further, the lid portion 30 has partition walls 31, 32, 33, and 34 that correspond to the partition walls 21, 23, 25, and 27 of the cylindrical flow path portion 20, respectively. These partition walls 31 to 34 stand upright in the central axis direction at predetermined angular intervals on the inner wall of the annular cavity of the lid portion 30. When the motor is accommodated in the housing 100, the free ends of the partition walls 31 to 34 are configured to contact the outer peripheral surface of the motor 40.

  A folded channel 31 a is formed between the partition wall 31 and the partition wall 32 in the lid 30. The folded flow path 31a faces the flow paths 21a and 22a of the cylindrical flow path portion 20, and guides the cooling water supplied from the flow path 21a to the flow path 22a.

  A folded channel 32 a is formed between the partition wall 32 and the partition wall 33. The folded flow path 32a is opposed to the flow paths 23a and 24a of the cylindrical flow path section 20, and guides the cooling water supplied from the flow path 23a to the flow path 24a.

  A folded flow path 33 a is formed between the partition wall 33 and the partition wall 34. The folded flow path 33a faces the flow paths 25a and 26a of the cylindrical flow path portion 20, and guides the cooling water supplied from the flow path 25a to the flow path 26a.

  A folded channel 34 a is formed between the partition wall 34 and the partition wall 31. The folded flow path 34a faces the flow paths 27a and 28a of the cylindrical flow path portion 20, and guides the cooling water supplied from the flow path 27a to the flow path 28a.

  An opening 35 is provided at the outer end of the lid 30. The end of the motor 40 is fitted into the opening 35. The end portion of the motor 40 in the opening 35 and the lid portion 30 are water-tightly coupled with an adhesive or packing.

  FIGS. 7A and 7B are a front view of a state in which the motor 40 is accommodated in the housing 100, and a cross-sectional view taken along the line BB in FIG.

  As clearly shown in FIG. 7B, the lid portion 10 and the cylindrical flow passage portion 20 are connected to the shoulder portion 10 a of the end portion of the lid portion 10 at the circumferential end of one end of the cylindrical flow passage portion 20. The parts are connected by fitting. Similarly, the lid portion 30 and the cylindrical flow passage portion 20 are connected by fitting the circumferential end portion of the other end of the tubular flow passage portion 20 to the shoulder portion 30a of the end portion of the lid portion 30. The The inner wall surfaces of the flow paths 13a, 25a, and 33a constitute the outer peripheral wall surface of the motor. The same applies to the other flow paths, the water supply chamber 11a, and the drain chamber 15a.

  FIG. 8 is a perspective view of the lid 10 cut along a plane orthogonal to the shaft 43 of the motor. This cut surface also shows cross sections of the water supply pipe 16a and the drain pipe 17a.

  FIG. 9 is a perspective view of the first lid portion 10 side portion of the motor water cooling structure shown in FIG. 2, in which the cylindrical flow passage portion 20 is cut along a plane orthogonal to the motor shaft 43. In FIG. 9 and subsequent sectional views, the motor 40 is shown as a dense member for convenience.

  FIG. 10 is a perspective view of the cylindrical flow passage 20 side portion of the motor water cooling structure shown in FIG. 2, with the second lid 30 cut along a plane orthogonal to the motor shaft 43. FIG. 11 is a perspective view of the cut second lid 30 as viewed from the inside.

  FIGS. 12A, 12B, and 12C correspond to FIGS. 8, 9, and 10, and show the flow of cooling water in the motor cooling structure of the present embodiment.

  Cooling water supplied from an external water supply tank or the like (not shown) flows from the water supply pipe 16a of the lid 10 into the flow path 21a (outward flow path) of the cylindrical flow path section 20 via the water supply chamber 11a. . The cooling water in the flow path 21a reaches the folded flow path 31a of the lid portion 30 and is guided to the flow path 22a (return flow path) of the cylindrical flow path portion 20 here.

  The cooling water in the flow path 22a reaches the return flow path 12a of the lid portion 10, and is guided to the flow path 23a (forward flow path) of the cylindrical flow path portion 20 here. The cooling water in the flow path 23a reaches the return flow path 32a of the lid portion 30 and is guided to the flow path 24a (return flow path) of the cylindrical flow path portion 20 here.

  The cooling water in the flow path 24a reaches the return flow path 13a of the lid 10 and is guided to the flow path 25a (forward flow path) of the cylindrical flow path portion 20 here. The cooling water in the flow path 25a reaches the return flow path 33a of the lid portion 30 and is guided to the flow path 26a (return flow path) of the cylindrical flow path portion 20 here.

  The cooling water in the channel 26 a reaches the folded channel 14 a of the lid 10, where it is guided to the channel 27 a (forward channel) of the cylindrical channel unit 20. The cooling water in the flow path 27a reaches the folded flow path 34a of the lid portion 30 and is guided to the flow path 28a (return flow path) of the cylindrical flow path portion 20 here.

  The cooling water in the flow path 28a reaches the drainage chamber 15a of the lid 10 and is discharged from the drainage pipe 17a. The discharged cooling water absorbs heat generated by the motor and rises in temperature, and is radiated by a radiator or the like (not shown) and returned to the water supply tank.

  This embodiment assumes application to a motor used for a robot. For example, for robots that require movement, robots that require a certain amount of power even in a space-saving environment, and robots that comply with the industry guideline rating of 80W for collaborative work with humans, control with as small and high output as possible. The present invention is useful. However, the present invention is not limited to the application to a robot.

According to the present embodiment, the following special effects can be obtained.
(1) The motor can be cooled by scanning the entire surface of the motor with water flowing through the cylindrical flow path. Thereby, a high cooling capacity can be provided. In particular, since the outer wall (outer peripheral surface) of the motor directly forms the inner wall of the flow path, the cooling water is in direct contact with the motor, so that the water cooling efficiency is improved.
(2) Since the channel cross-sectional area can be designed freely, the effective cross-sectional area of each channel can be made constant. The “effective cross-sectional area” is not an actual cross-sectional area but a cross-sectional area considering resistance when an obstacle such as a temperature sensor is interposed in the flow path as in the above-described embodiment. However, it is not essential to use a temperature sensor. Even when used, the number is not particularly limited.
(3) Since the outer peripheral surface of the motor is used as the inner wall surface of the flow path and the folded flow path is provided on the lid side, the flow path of the cylindrical flow path portion is simply linear from one end to the other end. Just pass through. As a result, the cross-sectional shape of the cylindrical channel portion can be made the same at any position from one end to the other end in the axial direction. As a result, the configuration of the cylindrical flow path portion is extremely simplified, facilitating manufacture and reducing the number of necessary parts. For example, it can be manufactured relatively easily by cutting or extrusion molding. The cylindrical channel part can also be manufactured by injection molding. The lid can also be easily manufactured by cutting or injection molding. Therefore, the manufacturing cost can be reduced.

  Next, an application example of the present embodiment will be described with reference to FIGS. FIG. 13 is a perspective view showing the appearance of the motor water cooling mechanism of this application example. FIGS. 14A, 14B, and 14C are perspective views of the motor water cooling mechanism cut at three locations.

  In this application example, a plurality of motors (two in this example) are accommodated in a single cooling housing. First and second cylindrical spaces for accommodating the first and second motors, respectively, are provided in parallel to each other. Similarly to the above, the housing 100a is roughly configured by a central cylindrical flow path portion 20b, and a first lid portion 10b and a second lid portion 30b coupled to both ends thereof. Each of these parts has a cross section corresponding to the first and second motors substantially like that of binoculars. However, only one set of water supply pipe 16a (water supply part) and drain pipe 17a (drainage part) provided in the first lid 10b is provided and shared by both motors.

  The cylindrical flow path portion 20b has a shape in which the substantially cylindrical tubular flow path portions 20 of the above-described embodiment are connected in parallel. A plurality of flow paths an to n (forward flow path and return flow path) extending in parallel with each other along the central axis of the cylinder are formed between the plurality of partition walls and the outer peripheral surface of each motor. The flow paths a to f are associated with the first motor, and the flow paths h to n are associated with the second motor. A central flow path g is associated with both the first and second motors.

  The first lid portion 10b is provided with folded channels bc, de, fg, hi, jk, and lm. Here, the folded flow path shown in FIG. 14 is indicated by two symbols (alphabet letters). This notation means that the cooling water is guided from the channel represented by the former symbol to the channel represented by the latter symbol. For example, the return channel bc guides the cooling water from the channel b to the channel c. Similarly, the return lids ab, cd, ef, gh, ij, kl, and mn are provided in the second lid 30b. In the illustrated example, the channel a is connected to the water supply unit 16a, and the channel n is connected to the water pipe 17a.

In order to share one set of water supply pipe 16a and drain pipe 17a for the first and second motors, the cooling water introduced into the water supply pipe 16a first flowed through the entire flow path corresponding to the first motor. Then, it flows through all the flow paths corresponding to the second motor and reaches the drain pipe 17a. For this purpose, the flow paths for both motors are connected at the middle of the housing. There are the following two methods.
(1) One linear flow path in the cylindrical flow path portion 20b is shared by the first and second motors. In the example of FIG. 14, the flow path g corresponds to this. The cooling water flowing through this flow path g contacts the outer walls of both motors. The cooling water for the first motor in the cylindrical flow path portion 20b finally flows into this flow path, and then the first lid portion 10b or the second lid portion 30b (the second lid portion 30b in the illustrated example). Is guided to the flow path of the second motor. The example shown in FIG. 14 corresponds to this structure.
(2) The cylindrical flow path portion 20b has independent flow paths for the first and second motors, and the flow of the second motor is caused by the first lid portion 10b or the second lid portion 30b. Guided to the road.

  Other configurations, operations, and effects of this application example are as described above.

  The preferred embodiments of the present invention have been described above, but various modifications and changes other than those mentioned above can be made. For example, the number of forward flow paths and return flow paths is not limited to the illustrated example. Although an example in which both the water supply pipe and the drain pipe are provided in one lid portion has been shown, a water supply pipe may be provided in one of the lid portions, and a drain pipe may be provided in the other. In that case, the number of forward flow paths is one more than the number of multiple paths.

DESCRIPTION OF SYMBOLS 10 1st cover part 10a Shoulder part 10b 1st cover parts 11-15 Partition wall 11a Water supply chamber 12a, 13a, 14a Folding flow path 15a Drainage chamber 16 Water supply port 16a Water supply pipe 17 Drainage port 17a Drainage pipes 18, 19 Screw Hole 20 Tubular channel portion 20b Tubular channel portions 21-28 Partition walls 21a-28a Folded channel 29 Broken line circle 30 Second lid portion 30a Shoulder portion 30b Second lid portions 31-34 Partition walls 31a-34a Flow path 40 Motor 42 End cover 43 Rotating shaft 44, 46 Thread groove 47 End 50 Flow path 100 Housing 100a Housing ag Flow paths ab, bc, cd, de, ef, fg, gh, hi, ij, jk , Kl, lm, mn Folded channel

Claims (12)

A water-cooling motor structure that includes a water-cooling housing that houses a motor, and that cools the motor with cooling water flowing through the water-cooling housing;
The water cooling housing is
A plurality of partition walls standing upright in the central axis direction at predetermined angular intervals on a substantially cylindrical inner wall, and a plurality extending parallel to each other along the central axis between the plurality of partition walls and the outer peripheral surface of the motor A cylindrical flow path portion in which a forward flow path and a plurality of return flow paths are formed;
A first lid having a plurality of folded channels that closes the first opening of the cylindrical channel and connects the return channel of the cylindrical channel to a subsequent forward channel;
A second lid portion having a plurality of folded flow passages for closing the second opening of the tubular flow passage portion and connecting the forward flow passage of the tubular flow passage portion to a subsequent return flow passage;
A water supply portion provided in the first lid portion and connected to an inlet of a first forward flow path among the plurality of flow paths of the cylindrical flow path section;
A water-cooled motor structure comprising: a drainage portion connected to an outlet of the last return flow path of the first lid portion, or a drainage portion connected to an exit of the final forward flow path of the second lid portion.   2. The water-cooled motor structure according to claim 1, wherein a cross-sectional shape of an inner wall of the cylindrical flow path portion is the same at an arbitrary position from one end to the other end in the axial direction.   The folded flow path provided in the first and second lid portions is constituted by a cavity that connects two adjacent flow paths of the cylindrical flow path portion provided inside the lid portion. Or the water-cooled motor structure of 2.   The water supply part which receives supply of cooling water from the outside and flows into the said housing for water cooling, and the waste_water | drain part which discharges | emits the cooling water which passed the said water cooling housing outside are provided in the said 1st cover part. Or the water cooling motor structure of 3.   A water supply portion that receives cooling water from the outside and flows to the water cooling housing is provided in the first lid portion, and a drainage portion that discharges the cooling water that has passed through the water cooling housing to the outside is provided in the second lid portion. The water-cooled motor structure according to claim 1, 2 or 3. The water cooling housing has first and second spaces connected to each other in parallel, corresponding to the first and second motors,
One set of the water supply unit and the drainage unit are shared by the first and second spaces,
The cooling water supplied to the water supply section flows through a plurality of flow paths in the first space, then flows through a plurality of flow paths in the second space, and is discharged from the drainage section. The water cooling motor structure in any one of 1-5. A water cooling housing that houses a motor and cools the motor with cooling water,
A plurality of partition walls standing upright in the central axis direction at predetermined angular intervals on a substantially cylindrical inner wall, and a plurality extending parallel to each other along the central axis between the plurality of partition walls and the outer peripheral surface of the motor A cylindrical flow path portion in which a forward flow path and a plurality of return flow paths are formed;
A first lid having a plurality of folded channels that closes the first opening and connects the return channel of the cylindrical channel to a subsequent forward channel;
A second lid portion having a plurality of folded flow passages for closing the second opening of the tubular flow passage portion and connecting the forward flow passage of the tubular flow passage portion to a subsequent return flow passage;
A water supply portion provided in the first lid portion and connected to an inlet of a first forward flow path among the plurality of flow paths of the cylindrical flow path section;
A water cooling housing comprising: a drainage portion connected to an outlet of the last return flow path of the first lid portion or a drainage portion connected to an exit of the final forward flow path of the second lid portion.   The water cooling housing according to claim 7, wherein a cross-sectional shape of an inner wall of the cylindrical flow path portion is the same at an arbitrary position from one end to the other end in the axial direction.   The folded flow path provided in the first and second lid parts is configured by a cavity that connects two adjacent flow paths of the cylindrical flow path part provided inside the lid part. Or the water cooling housing according to 8.   The water supply part which receives the supply of cooling water from the outside and flows into the housing for water cooling, and the drainage part which discharges the cooling water that has passed through the water cooling housing to the outside are provided in the first lid part. Or 9. The water cooling housing according to 9.   A water supply portion that receives cooling water from the outside and flows to the water cooling housing is provided in the first lid portion, and a drainage portion that discharges the cooling water that has passed through the water cooling housing to the outside is provided in the second lid portion. The water cooling housing according to claim 7, 8 or 9. As the cylindrical flow path portion, the first and second spaces corresponding to the first and second motors and connected in parallel to each other are provided.
One set of the water supply section and the drainage section are shared by the plurality of cylindrical flow path sections,
The cooling water supplied to the water supply section flows through the plurality of flow paths in the first space, then flows through the plurality of flow paths in the second space, and is discharged from the drainage section. The housing for water cooling in any one of -11.