Special end cover structure for integration of permanent magnet synchronous motor and speed reducer

Abstract

The invention discloses a special end cover structure for integration of a permanent-magnet synchronous motor and a speed reducer, relates to the technical field of permanent-magnet synchronous motors, and aims to solve the problems that a permanent-magnet synchronous motor body and a speed reducer are separated from each other in the background technology, so that the total weight of the permanent-magnet synchronous motor is heavy, and the joint of the motor and the speed reducer is complex in structure. According to the scheme, the speed reducer input shaft fixing device comprises a connecting structure, the connecting structure comprises a connecting ring and two mounting bosses, flange plates are arranged at the two ends of the connecting ring, the two mounting bosses are arranged in the connecting ring, and one side of one mounting boss is connected with a speed reducer input shaft fixing ring through a bolt; and a speed reducer bearing fixing ring is arranged on one side of the speed reducer input shaft fixing ring. A coupler, an independent end cover and an external lubricating component are eliminated, the occupied space and the weight are reduced, maintenance is convenient, heat can be prevented from being accumulated in an integrated unit, the motor is allowed to continuously and stably operate at higher power density, and the thermal performance boundary of the whole system is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of permanent magnet synchronous motor, and particularly relates to a special end cover structure for integration of permanent magnet synchronous motor and speed reducer. BACKGROUND

[0002] The permanent magnet synchronous motor is a synchronous motor using a permanent magnet to generate a magnetic field, the rotation speed of the rotor is consistent with the current frequency of the stator winding, the permanent magnet synchronous motor is composed of a stator, a rotor and an end cover and the like, the stator is basically the same as that of a common induction motor, a lamination structure is adopted to reduce the iron loss during operation of the motor, the rotor can be made into a solid body or be laminated and pressed, and the armature winding can adopt concentrated full-pitch winding or distributed short-pitch winding and unconventional winding.

[0003] The permanent magnet synchronous motor integrated with the speed reducer on the motor body is a motor combining a permanent magnet synchronous motor body, a speed reducer and the like, a speed reducer gear and other speed reducer components are installed at the front section of the permanent magnet synchronous motor shell, and the motor body components such as the stator and the rotor are installed at the rear section, so as to realize heat dissipation, weight reduction and torque transmission of the motor, the motor directly operates in a vehicle cabin to drive a propeller to drive the vehicle to travel, the permanent magnet synchronous motor body part includes a stator, a rotor, a driving end bearing, a driving end cover, a non-driving end cover, a driving end bearing and a rotary transformer, and the speed reducer includes an external shell and a planetary gear, wherein the motor driving end cover simultaneously serves as the end cover of the speed reducer, and the speed reducer is directly fixed on the motor body, so that the problem of large overall volume and total weight of the motor is solved.

[0004] When the motor operates in the cabin, on the one hand, sufficient torque needs to be output, if the motor body is simply relied on to output the torque, the volume and weight of the motor need to be increased to meet the requirement of output torque, on the other hand, the overall volume and total weight of the motor body and the speed reducer need to be considered, if the speed reducer is simply considered to be increased, sufficient space needs to be left for the speed reducer to meet the requirement of output torque.

[0005] The prior art is that the permanent magnet synchronous motor body and the speed reducer are placed in sections, the speed reducer is generally designed as an independent section, connected through a shaft coupling to realize transmission of the motor torque, however, the permanent magnet synchronous motor body and the speed reducer in the prior art are separated from each other, resulting in heavy total weight of the permanent magnet synchronous motor, and the connection structure of the motor and the speed reducer is complex, which is not conducive to maintenance. SUMMARY

[0006] The present application provides a special end cover structure for integration of permanent magnet synchronous motor and speed reducer, which solves the problem that the permanent magnet synchronous motor body and the speed reducer in the prior art are separated from each other, resulting in heavy total weight of the permanent magnet synchronous motor, and the connection structure of the motor and the speed reducer is complex, which is not conducive to maintenance.

[0007] To achieve the above object, the present application adopts the following technical solutions: A special end cover structure for integrating permanent magnet synchronous motor and reducer, comprising a connecting structure, the connecting structure comprises a connecting ring provided with flanges at both ends and two mounting bosses arranged in the connecting ring, one side of one of the mounting bosses is connected with a reducer input shaft fixing ring through bolts, and one side of the reducer input shaft fixing ring is provided with a reducer bearing fixing ring, one side of the other mounting boss is connected with a motor output shaft fixing ring through bolts, and one side of the motor output shaft fixing ring is provided with a motor bearing fixing ring, an oil storage cylinder is connected on the outer wall of the opposite side of the reducer input shaft fixing ring and the motor output shaft fixing ring through bolts, a mounting ring is arranged in the motor output shaft fixing ring, and a fixing ring is arranged in the mounting ring, a connecting ring is connected in the fixing ring through bearings, a closed impeller is connected on the outer wall of one side of the connecting ring through bolts, a plurality of splines are arranged on the inner wall of the closed impeller, an oil delivery pipe is fixed on the inner wall of the upper part of the closed impeller, and the two ends of the oil delivery pipe are fixed on the upper inner wall of the reducer bearing fixing ring and the motor bearing fixing ring respectively, a one-way oil return pipe is fixed on the lower inner wall of the oil storage cylinder, and the two ends of the one-way oil return pipe are fixed on the lower inner wall of the reducer bearing fixing ring and the motor bearing fixing ring respectively.

[0008] Preferably, the connecting ring and the two mounting bosses are integrally casted from aluminum alloy, and threaded holes are arranged on the outer wall of the two mounting bosses.

[0009] Preferably, the reducer input shaft fixing ring and the reducer bearing fixing ring are integrally casted from aluminum alloy, and a first sealing cover is connected on one side of the reducer bearing fixing ring through bolts, and a first sealing ring is arranged between the reducer bearing fixing ring and the first sealing cover.

[0010] Preferably, the motor output shaft fixing ring and the motor bearing fixing ring are integrally casted from aluminum alloy, and a second sealing cover is connected on one side of the motor bearing fixing ring through bolts, and a second sealing ring is arranged between the motor bearing fixing ring and the second sealing cover.

[0011] Preferably, limit bosses are integrally formed on the inner wall of the two ends of the oil storage cylinder, and sealing rings are arranged on one side of the two limit sleeves, and the two sealing rings abut against the outer wall of one side of the reducer input shaft fixing ring and the motor output shaft fixing ring respectively.

[0012] Preferably, one end of the mounting ring is welded to the inner wall of the limit boss close to the motor output shaft fixing ring, and the mounting ring and the fixing ring are integrally casted.

[0013] Preferably, the reducer input shaft fixing ring is rotatably installed with a reducer input shaft, the motor output shaft fixing ring is rotatably installed with a motor output shaft, and the motor output shaft is connected to the reducer input shaft through a spline connection, and the closed impeller is connected to the outer wall of the motor output shaft through a spline connection.

[0014] The beneficial effects of the present application are: 1. By combining the motor end cover and the reducer end cover into one, a special end cover is formed, and the inside of the end cover simultaneously accommodates the bearing seat, the lubricating oil storage cylinder and the lubricating pump, thereby realizing high reuse of the structure, eliminating the coupling, the independent end cover and the external lubricating components, reducing the occupied space and weight, and facilitating maintenance.

[0015] 2. By rotating the closed impeller when the permanent magnet synchronous motor output shaft rotates, the lubricating oil is circulated and flows, lubricates the spline connection of the motor output shaft and the reducer input shaft, the motor bearing and the reducer bearing, and the continuously flowing lubricating oil can effectively take away the friction heat generated by the spline meshing part and the bearing, and dissipate heat through the lubricating oil storage cylinder and the end cover body, thereby preventing heat accumulation in the integrated unit, allowing the motor to continuously and stably operate at a higher power density, and improving the thermal performance boundary of the entire system.

[0016] In summary, the present application eliminates the coupling, the independent end cover and the external lubricating components, reduces the occupied space and weight, facilitates maintenance, prevents heat accumulation in the integrated unit, allows the motor to continuously and stably operate at a higher power density, and improves the thermal performance boundary of the entire system. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 The present application proposes a whole front view structure schematic diagram of a special end cover structure for integration of a permanent magnet synchronous motor and a reducer.

[0018] Figure 2 The present application proposes a front view cross-sectional structure schematic diagram of a special end cover structure for integration of a permanent magnet synchronous motor and a reducer.

[0019] Figure 3 The present application proposes a connection structure front view cross-sectional structure schematic diagram of a special end cover structure for integration of a permanent magnet synchronous motor and a reducer.

[0020] Figure 4 The present application proposes a reducer input shaft fixing ring and reducer bearing fixing ring assembly cross-sectional structure schematic diagram of a special end cover structure for integration of a permanent magnet synchronous motor and a reducer.

[0021] Figure 5A motor output shaft fixing ring and a motor bearing fixing ring assembly section structure schematic diagram of a special end cover structure for permanent magnet synchronous motor and reducer integration is provided in the present application.

[0022] Figure 6 A main view section structure schematic diagram of an oil storage cylinder of a special end cover structure for permanent magnet synchronous motor and reducer integration is provided in the present application.

[0023] Figure 7 A special end cover structure for permanent magnet synchronous motor and reducer integration is provided in the present application. Figure 2 An enlarged structure schematic diagram at A in the figure.

[0024] Figure 8 An installation ring and a closed impeller assembly section structure schematic diagram of a special end cover structure for permanent magnet synchronous motor and reducer integration is provided in the present application.

[0025] Figure 9 A closed impeller main view structure schematic diagram of a special end cover structure for permanent magnet synchronous motor and reducer integration is provided in the present application.

[0026] Figure 10 A reducer input shaft structure schematic diagram of a special end cover structure for permanent magnet synchronous motor and reducer integration is provided in the present application.

[0027] Figure 11 A motor output shaft structure schematic diagram of a special end cover structure for permanent magnet synchronous motor and reducer integration is provided in the present application.

[0028] In the figure: 1, connecting structure; 101, connecting ring; 102, installation boss; 2, reducer input shaft fixing ring; 3, reducer bearing fixing ring; 4, first sealing cover; 5, motor output shaft fixing ring; 6, motor bearing fixing ring; 7, second sealing cover; 8, oil storage cylinder; 81, limiting boss; 82, sealing ring; 9, installation ring; 10, fixing ring; 11, connecting ring; 12, closed impeller; 13, oil delivery pipe; 14, one-way oil return pipe. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments.

[0030] Embodiment 1, refer to Figures 1-5The utility model provides a special end cover structure for permanent magnet synchronous motor and reducer integration, including connecting structure 1, connecting structure 1 includes the connecting ring 101 of both ends being equipped with flange and two installation boss 102 in connecting ring 101, and connecting ring 101 and two installation boss 102 are all aluminium alloy integrally cast into shape, and the outer wall of two installation boss 102 is all opened the threaded hole, and one installation boss 102 side is connected with the reducer input shaft fixing ring 2 through bolt, and the one side of reducer input shaft fixing ring 2 is equipped with reducer bearing fixing ring 3, and reducer input shaft fixing ring 2 and reducer bearing fixing ring 3 are aluminium alloy integrally cast into shape, and the one side of reducer bearing fixing ring 3 is connected with the first sealing cover 4 through bolt, and the first sealing ring is equipped between reducer bearing fixing ring 3 and first sealing cover 4, and one installation boss 102 side is connected with the motor output shaft fixing ring 5 through bolt, and the one side of motor output shaft fixing ring 5 is equipped with motor bearing fixing ring 6, and motor output shaft fixing ring 5 and motor bearing fixing ring 6 are aluminium alloy integrally cast into shape, and the one side of motor bearing fixing ring 6 is connected with the second sealing cover 7 through bolt, and the second sealing ring is equipped between motor bearing fixing ring 6 and second sealing cover 7.

[0031] Embodiment 2, refer to Figures 6-11 The utility model provides a special end cover structure for permanent magnet synchronous motor and reducer integration, further, the outer wall of opposite side of reducer input shaft fixing ring 2 and motor output shaft fixing ring 5 is connected with the oil storage cylinder 8 through bolt, and the inner wall of both ends of oil storage cylinder 8 is integrally formed with the limit boss 81, and the one side of two limit sleeves 81 is equipped with the sealing ring 82, and two sealing rings 82 abut on the outer wall of one side of reducer input shaft fixing ring 2 and motor output shaft fixing ring 5 respectively, and the inside of motor output shaft fixing ring 5 is equipped with the mounting ring 9, and the inside of mounting ring 9 is equipped with the fixed ring 10, and the one end of mounting ring 9 is welded on the inner wall of limit boss 81 close to motor output shaft fixing ring 5, and mounting ring 9 and fixed ring 10 are integrally cast into shape, and the inside of fixed ring 10 is connected with the connecting ring 11 through bearing, and the outer wall of one side of connecting ring 11 is connected with the closed impeller 12 through bolt, and the inner wall of closed impeller 12 is opened with several spline, and the reducer input shaft is rotatably installed in reducer input shaft fixing ring 2, and the motor output shaft is rotatably installed in motor output shaft fixing ring 5, and the motor output shaft is connected in the reducer input shaft through spline, and the closed impeller 12 is connected on the outer wall of motor output shaft through spline, and the inner wall of upper portion of closed impeller 12 of oil storage cylinder 8 is fixedly equipped with the oil pipe 13, and the inner wall of upper portion of reducer bearing fixing ring 3 and motor bearing fixing ring 6 is fixedly equipped with the oil pipe 13 both ends respectively, and the inner wall of lower portion of oil storage cylinder 8 is fixedly equipped with the one-way oil return pipe 14, and the inner wall of lower portion of reducer bearing fixing ring 3 and motor bearing fixing ring 6 is fixedly equipped with the one-way oil return pipe 14 both ends respectively.

[0032] The motor end cover and the reducer end cover are combined into one special end cover, and the inside of the special end cover simultaneously contains bearing seats, lubricating oil storage cylinders and other structures, and the high reuse of the structure is realized; when the permanent magnet synchronous motor starts, the motor output shaft starts to rotate and drives the closed impeller 12 and the reducer input shaft to rotate; when the closed impeller 12 rotates, the blades work on the lubricating oil in the oil storage cylinder 8; the lubricating oil is sucked from the center (low pressure area) of the closed impeller 12 and is forced to move at high speed to the outer edge of the closed impeller 12, and is collected into the oil delivery pipe 13; part of the oil is delivered into the motor bearing fixed ring 6, and the other part of the oil is delivered into the reducer bearing fixed ring 3; the oil that completes the lubrication and cooling tasks naturally falls downward under the action of gravity and enters the oil storage cylinder 8 along the one-way oil return pipe 14.

[0033] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0034] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0035] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can make equivalent replacements or changes to the technical solution and the inventive concept of the present application within the technical scope disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A dedicated end cap structure for integrating a permanent magnet synchronous motor and a reducer, comprising a connecting structure (1), characterized in that, The connection structure (1) includes a connecting ring (101) with flanges at both ends and two mounting bosses (102) located in the connecting ring (101). One of the mounting bosses (102) is bolted to a reducer input shaft retaining ring (2), and a reducer bearing retaining ring (3) is provided on one side of the reducer input shaft retaining ring (2). One of the mounting bosses (102) is bolted to a motor output shaft retaining ring (5), and a motor bearing retaining ring (6) is provided on one side of the motor output shaft retaining ring (5). An oil reservoir (8) is bolted to the outer wall of the opposite side of the input shaft fixing ring (2) of the reducer and the output shaft fixing ring (5) of the motor. The motor output shaft fixing ring (5) is provided with a mounting ring (9), and the mounting ring (9) is provided with a fixing ring (10). The fixed ring (10) is connected to the connecting ring (11) by a bearing, and a closed impeller (12) is connected to the outer wall of one side of the connecting ring (11) by bolts. The inner wall of the closed impeller (12) has several splines. The oil storage tank (8) is fixedly provided with an oil delivery pipe (13) on the inner wall above the closed impeller (12), and the two ends of the oil delivery pipe (13) are respectively fixed on the upper inner wall of the reducer bearing fixing ring (3) and the motor bearing fixing ring (6). The lower inner wall of the oil storage tank (8) is fixedly provided with a one-way return oil pipe (14), and the two ends of the one-way return oil pipe (14) are respectively fixed on the lower inner wall of the reducer bearing fixing ring (3) and the motor bearing fixing ring (6).

2. A special end cover structure for integrating a permanent magnet synchronous motor and a reducer according to claim 1, characterized in that, The connecting ring (101) and the two mounting bosses (102) are all integrally cast from aluminum alloy, and threaded holes are opened on the outer wall of the two mounting bosses (102).

3. A special end cover structure for integrating a permanent magnet synchronous motor and a reducer according to claim 1, characterized in that, The reducer input shaft fixing ring (2) and the reducer bearing fixing ring (3) are integrally cast from aluminum alloy, and a first sealing cover (4) is bolted to one side of the reducer bearing fixing ring (3). A first sealing ring is provided between the reducer bearing fixing ring (3) and the first sealing cover (4).

4. A special end cover structure for integrating a permanent magnet synchronous motor and a reducer according to claim 1, characterized in that, The motor output shaft fixing ring (5) and the motor bearing fixing ring (6) are integrally cast from aluminum alloy, and a second sealing cover (7) is bolted to one side of the motor bearing fixing ring (6). A second sealing ring is provided between the motor bearing fixing ring (6) and the second sealing cover (7).

5. A special end cover structure for integrating a permanent magnet synchronous motor and a reducer according to claim 1, characterized in that, The inner walls of both ends of the oil storage cylinder (8) are integrally formed with limiting bosses (81), and each of the two limiting sleeves (81) is provided with a sealing ring (82) on one side. The two sealing rings (82) respectively abut against the outer wall of the input shaft fixing ring (2) of the reducer and the output shaft fixing ring (5) of the motor.

6. A dedicated end cover structure for integrating a permanent magnet synchronous motor and a reducer according to claim 5, characterized in that, One end of the mounting ring (9) is welded to the inner wall of the limiting boss (81) near the fixed ring (5) of the motor output shaft, and the mounting ring (9) and the fixed ring (10) are integrally cast.

7. A dedicated end cover structure for integrating a permanent magnet synchronous motor and a reducer according to claim 1, characterized in that, The input shaft of the reducer is rotatably installed inside the input shaft fixing ring (2), and the output shaft of the motor is rotatably installed inside the output shaft fixing ring (5). The output shaft of the motor is connected to the input shaft of the reducer by a spline, and the closed impeller (12) is connected to the outer wall of the output shaft of the motor by a spline.

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