Integrated combined motor

Abstract

The utility model discloses an integrated combined motor, which is characterized in that a rotor comprises at least one middle iron core and two end iron cores, the at least one middle iron core is sleeved on a motor shaft side by side in a synchronous rotation manner, the two end iron cores are symmetrically arranged at the two ends of all the middle iron cores, and annular abdicating grooves are formed between the two end iron cores and the motor shaft. Compared with a traditional hollow rotor motor, the annular receding groove improves the axial installation space near the motor shaft, so that a bearing, a locking piece, an encoder and other adjacent parts of the motor can use the annular receding groove, the axial width size of the motor is reduced, and the motor structure is more compact. And meanwhile, each middle iron core and each end iron core are respectively provided with a permanent magnet in a penetrating manner, so that the power of the motor is not influenced by structural optimization. Meanwhile, due to the design that the iron cores are staggered in the same direction, the starting torque of the motor is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to an integrated combined motor. Background Art

[0002] As the core component of electric vehicles, electric motorcycles and electric bicycles, the main function of the motor is to convert the electrical energy stored in the battery into mechanical energy to propel the vehicle. Compared with traditional internal combustion engines, the motor has the advantages of zero emissions, low noise and high efficiency.

[0003] The motor consists of a stator and a rotor. The stator is generally fixedly mounted on the inner wall of the motor housing, and a coil is wound on the stator. The rotor is rotatably arranged inside the stator and is mounted on the motor shaft. Magnetic steel sheets are inserted into the rotor core. The magnetic steel sheets are used to generate a magnetic field and interact with the coil, thereby generating power to drive the motor rotor to operate.

[0004] In the field of electric motorcycles, the current mainstream trend is that the power system is developing in the direction of miniaturization and lightweight. In the actual production process of the motor, in order to increase the output power of the drive motor, it is usually chosen to increase the number and size of the magnetic steel sheets, which increases the volume of the rotor core, thereby causing the volume and weight of the motor to increase, which runs counter to the development direction of miniaturization of the power system.

[0005] Therefore, it is urgent to develop and design a motor structure that can ensure normal output power while making the overall structure more compact. Utility Model Content

[0006] In order to solve the technical problems of large size and heavy weight of existing high-power motors, the utility model provides an integrated combined motor.

[0007] The technical solution is as follows:

[0008] The first aspect of the present application relates to an integrated combined motor, comprising a motor housing, a motor shaft rotatably mounted in the motor housing, a rotor synchronously rotatably mounted on the motor shaft, and a stator adapted to the rotor, wherein one end of the motor shaft passes out of the motor housing, the stator is fixedly mounted in the motor housing and surrounds the rotor, the rotor comprises at least one intermediate iron core synchronously rotatably mounted side by side on the motor shaft, and two end iron cores symmetrically arranged at both ends of all the intermediate iron cores, each intermediate iron core and each end iron core are uniformly distributed along the circumferential direction and penetrated with the same number of permanent magnets, the intermediate iron core is formed by stacking a plurality of intermediate magnetic steel sheets arranged side by side along the axial direction of the motor shaft, the end iron core is formed by stacking a plurality of end magnetic steel sheets arranged side by side along the axial direction of the motor shaft, the intermediate magnetic steel sheets and the end magnetic steel sheets are both annular sheet structures, the outer diameter of the intermediate magnetic steel sheet is equal to the outer diameter of the end magnetic steel sheet, and the inner diameter of the intermediate magnetic steel sheet is smaller than the inner diameter of the end magnetic steel sheet, so that annular clearance grooves are formed between the two end iron cores and the motor shaft.

[0009] The above integrated combined motor has the following beneficial effects:

[0010] 1. By arranging end cores with larger central apertures at both ends of the middle core, an annular clearance groove is formed between the motor shaft and the two end cores. Compared with the traditional hollow rotor motor, the annular clearance groove increases the axial installation space near the motor shaft, so that the adjacent components of the motor, such as the bearings, locking parts, encoders, etc., can use the annular clearance groove, thereby reducing the axial width of the motor and making the motor structure more compact.

[0011] 2. By inserting permanent magnets on each intermediate core and each end core, the total length of the permanent magnets is made as long as possible, so as to generate the strongest possible magnetic field, thereby ensuring that the power of the motor is not affected by structural optimization.

[0012] In some embodiments, the permanent magnets of the end cores and the middle core that are sequentially arranged in the axial direction are staggered at equal intervals in the same direction in the circumferential direction.

[0013] In some embodiments, the staggered angle of the permanent magnets between adjacent middle cores or between adjacent end cores and middle cores is greater than 0° and less than or equal to 5°.

[0014] In some embodiments, each end iron core and each intermediate iron core are locked together by multiple first threaded fasteners that penetrate axially, and each first threaded fastener is evenly distributed around the motor shaft in the circumferential direction. The end iron core and the intermediate iron core are each provided with bolt positioning holes with the same number as the first threaded fasteners. The bolt positioning holes of the end iron cores and the intermediate iron cores that are arranged sequentially in the axial direction are penetrated in sequence, and the bolt positioning holes of the end iron cores and the intermediate iron cores that are arranged sequentially in the axial direction increase or decrease in an arithmetic progression with respect to adjacent permanent magnets. After each first threaded fastener passes through the corresponding bolt positioning hole, all the end iron cores and the intermediate iron cores are locked together.

[0015] In some embodiments, the outer end surfaces of the two end cores are covered with dynamic balancing covers, and the two dynamic balancing covers, the two end cores and all the middle cores are fastened together by a plurality of the first threaded fasteners.

[0016] In some embodiments, the portions of the two dynamic balancing cover plates near their inner edges have cover plate sunken sections sunk into corresponding makeshift grooves, and the two cover plate sunken sections are respectively covered on the outer end surfaces of the two intermediate iron cores located at the ends, and the two cover plate sunken sections and all the intermediate iron cores are locked together by multiple second threaded fasteners that penetrate along the axial direction, and the second threaded fasteners are evenly distributed along the circumference of the motor shaft.

[0017] In some embodiments, the motor shaft is radially protruded with an annular mounting section that is compatible with the intermediate iron core, the annular mounting section is recessed with at least one mounting groove that penetrates the annular mounting section axially, and each intermediate magnetic steel sheet has a mounting protrusion protruding on the inner edge that corresponds to each mounting groove, and each mounting protrusion is respectively embedded in the corresponding mounting groove.

[0018] In some embodiments, the middle iron core and the end iron core are provided with a plurality of permanent magnet mounting holes distributed along the circumference of the motor shaft, and any two adjacent permanent magnet mounting holes are arranged in a "V" shape. The permanent magnet mounting holes pass through the corresponding middle iron core or end iron core, and a permanent magnet is embedded in each permanent magnet mounting hole.

[0019] In some embodiments, the intermediate core is provided with a plurality of axially penetrating heat dissipation holes, the heat dissipation holes of each intermediate core are sequentially connected along the axial direction, and the heat dissipation holes of the intermediate cores at both ends are respectively connected with the corresponding annular clearance grooves. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of an integrated combined motor.

[0021] Figure 2 Schematic diagram of the matching relationship between the rotor and the motor shaft.

[0022] Figure 3 This is the left side view of the motor shaft.

[0023] Figure 4 It is a schematic diagram of the structure of the end magnetic steel sheet.

[0024] Figure 5 It is a schematic diagram of the structure of the middle magnetic steel sheet.

[0025] Figure 6 for Figure 5 Enlarged view of point I in the middle.

[0026] Figure 7 A reference diagram for the usage status of the integrated combined motor in the motor drive system. DETAILED DESCRIPTION

[0027] The utility model is further described below in conjunction with embodiments and drawings.

[0028] like Figure 1-Figure 6 As shown, an integrated combined motor mainly includes a motor housing (not shown in the figure), a motor shaft 2, a rotor A, and a stator 1 adapted to the rotor A, wherein the motor shaft 2 is rotatably mounted in the motor housing, and one end of the motor shaft 2 passes out of the motor housing, the rotor A is synchronously rotatably sleeved on the motor shaft 2, and the stator 1 is fixedly mounted in the motor housing and surrounds the rotor A. Therefore, when the integrated combined motor is powered on, the rotor A will drive the motor shaft 2 to rotate synchronously with it.

[0029] In this embodiment, the rotor A includes at least an intermediate iron core A1 which is synchronously rotated and mounted side by side on the motor shaft 2, and two end cores A2 which are symmetrically arranged at both ends of all the intermediate iron cores A1. Each intermediate iron core A1 and each end core A2 are evenly distributed along the circumferential direction and are penetrated by the same number of permanent magnets 5. Each permanent magnet 5 extends from one end face of the corresponding intermediate iron core A1 or the corresponding end core A2 to the other end face, that is, each intermediate iron core A1 and each end core A2 are installed with a permanent magnet 5, so that the total length of the permanent magnet 5 is as long as possible, so that the strongest magnetic field can be generated, thereby ensuring that the power of the motor is not affected by the structural optimization.

[0030] Among them, the middle iron core A1 is formed by stacking a plurality of middle magnetic steel sheets A11 arranged side by side along the axial direction of the motor shaft 2, that is, adjacent middle magnetic steel sheets A1 are mutually fitted, and the end iron core A2 is formed by stacking a plurality of end magnetic steel sheets A21 arranged side by side along the axial direction of the motor shaft 2, that is, adjacent end magnetic steel sheets A2 are mutually fitted, the middle magnetic steel sheet A11 and the end magnetic steel sheet A21 are both annular sheet structures, and the outer diameter of the middle magnetic steel sheet A11 is equal to the outer diameter of the end magnetic steel sheet A21, and the inner diameter of the middle magnetic steel sheet A11 is smaller than the inner diameter of the end magnetic steel sheet A21, so that an annular clearance groove 6 is formed between the two end iron cores A2 and the motor shaft 2. It should be pointed out that the middle magnetic steel sheet A1 and the end magnetic steel sheet A2 are both made of silicon steel sheets.

[0031] Therefore, by arranging end cores A2 with larger central apertures at both ends of the middle core A1, an annular clearance groove 6 is formed between the motor shaft 2 of the motor and the two end cores A2. Compared with the traditional hollow rotor motor, the annular clearance groove 6 increases the axial installation space near the motor shaft 2, so that the adjacent components of the motor such as bearings, locking parts, encoders, etc. can use the annular clearance groove 6, thereby reducing the axial width of the motor and making the motor structure more compact.

[0032] See for example Figure 7 A motorcycle electric drive system includes a power source, an adaptive transmission 16 and a drive shaft 17 which are connected in sequence, wherein the power source adopts the integrated combined motor provided in this embodiment, and both ends of the motor shaft 2 of the integrated combined motor are rotatably supported in a motor housing (not shown in the figure) through bearings 14, and the bearings 14 are located exactly at the position of the annular clearance groove 6. Compared with the traditional motor structure without the annular clearance groove 6, the annular clearance groove 6 makes the axial width of the entire power output system narrower, thereby making the overall installation structure more compact.

[0033] In the above-mentioned motorcycle electric drive system, the power output by the motor shaft 2 is transmitted to the drive shaft 17 after the adaptive transmission 16 changes speed, and the drive shaft 17 outputs the power.

[0034] See also Figure 1-Figure 6 In this embodiment, the permanent magnets 5 of the end cores A2 and the middle cores A1 arranged sequentially in the axial direction are staggered at equal intervals in the same direction in the circumferential direction, that is, for an end core A2 or an middle core A1, it is equivalent to providing a layer of permanent magnets 5 distributed in an annular shape, and the permanent magnets 5 of adjacent layers are staggered at equal intervals in the same direction in the circumferential direction. Through such a design, it is equivalent to making the permanent magnets 5 of the motor change approximately in a spiral line in the axial direction, thereby improving the starting torque of the motor.

[0035] Furthermore, between adjacent middle cores A1 or between adjacent end cores A2 and middle cores A1, the staggered angle of the permanent magnets 5 is greater than 0° and less than or equal to 5°. Such a design can not only improve the starting torque of the motor, but also enable the permanent magnets 5 to be designed more closely, thereby generating as strong a magnetic field as possible and improving the power of the motor.

[0036] Furthermore, the staggered angle of the permanent magnets 5 between adjacent middle cores A1 or between adjacent end cores A2 and middle cores A1 is preferably 1.25°, thereby further increasing the starting torque of the motor while ensuring that the permanent magnets 5 are arranged more closely and improving the power of the motor.

[0037] In this embodiment, each end core A2 and each intermediate core A1 are locked together by multiple first threaded fasteners 8a that penetrate axially, and each first threaded fastener 8a is evenly distributed around the motor shaft 2 along the circumferential direction, thereby ensuring the reliability of the rotor A structure.

[0038] At the same time, the end core A2 and the middle core A1 are provided with bolt positioning holes 9 of the same number as the first threaded fasteners 8a, the bolt positioning holes 9 of the end core A2 and the middle core A1 arranged in sequence in the axial direction are sequentially connected, and the spacing between the bolt positioning holes 9 of the end core A2 and the middle core A1 arranged in sequence in the axial direction and the adjacent permanent magnets 5 increases or decreases in an arithmetic progression, and each first threaded fastener 8a is distributed through the corresponding bolt positioning hole 9 to lock all the end cores A2 and the middle core A1 into one. Through such a design, by installing the first threaded fastener 8a, each end core A2 and each middle core A1 can be dislocated, thereby achieving the same-direction dislocation of the permanent magnets 5 of each end core A2 and each middle core A1, which is simple, reliable, and easy to assemble, and can improve the installation accuracy of the end core A2 and the middle core A1 by controlling the processing accuracy.

[0039] Furthermore, the outer end surfaces of the two end cores A2 are covered with dynamic balancing covers 7, and the two dynamic balancing covers 7, the two end cores A2 and all the intermediate cores A1 are locked together by a plurality of the first threaded fasteners 8a. Through such a design, the dynamic balancing covers 7 cooperate with the first threaded fasteners 8a to ensure the reliable installation of the intermediate magnetic steel sheets A1 and the end magnetic steel sheets A2, and can also ensure the dynamic balance of the rotation of the rotor A, thereby improving the stability of the rotation of the rotor A.

[0040] Furthermore, the two dynamic balancing cover plates 7 have cover plate sinking sections 7a near their inner edges that are sunken into the corresponding clearance grooves 7. The two cover plate sinking sections 7a are respectively covered on the outer end surfaces of the two intermediate iron cores A1 located at the ends, so that the two cover plate sinking sections 7a can assist in clamping each intermediate magnetic steel sheet A11.

[0041] At the same time, the two cover plate sinking sections 7a and all the intermediate iron cores A1 are locked together by multiple second threaded fasteners 8b that penetrate axially. The second threaded fasteners 8b are evenly distributed along the circumference of the motor shaft 2, thereby further ensuring the reliable installation of each intermediate magnetic steel sheet A11.

[0042] In this embodiment, the first threaded fastener 8a and the second threaded fastener 8b are both long bolts, and a first threaded hole respectively matched with each first threaded fastener 8a is provided on one of the dynamic balancing cover plates 7, and a second threaded hole respectively matched with each second threaded fastener 8b is provided on the cover plate sinking section 7a of the dynamic balancing cover plate 7, so that the first threaded fastener 8a and the second threaded fastener 8b can be directly locked on the corresponding first threaded hole and the second threaded hole without the use of nuts, which not only reduces the use of parts and reduces costs, but also facilitates assembly and is more stable and reliable. It should be pointed out that the nut parts of the first threaded fastener 8a and the second threaded fastener 8b are supported on the dynamic balancing cover plate 7 without the first threaded hole and on the cover plate sinking section 7a without the second threaded hole, which is simple and reliable.

[0043] In this embodiment, a plurality of permanent magnet mounting holes 11 distributed along the circumference of the motor shaft 2 are provided on the middle iron core A1 and the end iron core A2, and each permanent magnet mounting hole 11 penetrates the corresponding middle iron core A1 or the end iron core A2 respectively, and any two adjacent permanent magnet mounting holes 11 are arranged in a "V" shape, and the permanent magnet mounting holes 11 penetrate the corresponding middle iron core A1 or the corresponding end iron core A2, and a permanent magnet 5 is embedded in each permanent magnet mounting hole 11. Through the "V"-shaped arrangement of the permanent magnet mounting holes 11, the number of magnetic steel sheets 6 installed can be increased as much as possible, thereby further improving the output power of the motor.

[0044] Furthermore, the permanent magnets 5 are all common long strip-shaped sheet structures. Accordingly, the permanent magnet mounting holes 11 are overall long strip-shaped structures, and have outwardly extending extensions at the two short sides of the permanent magnet mounting holes 11. With such a design, the extensions facilitate the installation and removal of the permanent magnets 5.

[0045] In this embodiment, the motor shaft 2 is radially protruded to form an annular mounting section 2a adapted to the intermediate iron core A1, and the annular mounting section 2a is recessed to form at least one mounting groove 2a1 that axially penetrates the annular mounting section 2a. The inner edge of each intermediate magnetic steel sheet A11 is protruded with a mounting protrusion A111 corresponding to each mounting groove 2a1, and each mounting protrusion A111 is respectively embedded in the corresponding mounting groove 2a1. This design is not only easy to assemble each intermediate magnetic steel sheet A11 on the motor shaft 2, but also enables the intermediate iron core A1 to be reliably fixed and sleeved on the motor shaft 2, and each intermediate magnetic steel sheet A11 can be accurately positioned, which is simple and reliable.

[0046] In this embodiment, a plurality of axially penetrating heat dissipation holes 12 are provided on the middle iron core A1, and the heat dissipation holes 12 of each middle iron core A1 are connected in sequence along the axial direction, and the heat dissipation holes 12 of the middle iron core A1 at both ends are respectively connected with the corresponding annular clearance grooves 6. Such a design can not only assist the heat dissipation of the motor and ensure the normal operation of the motor, but also reduce the weight of the motor and reduce the production cost of the motor.

[0047] Finally, it should be noted that the above description is only a preferred embodiment of the present invention. Under the guidance of the present invention, ordinary technicians in this field can make a variety of similar expressions without violating the purpose and claims of the present invention, and such changes fall within the scope of protection of the present invention.

Claims

1. An integrated combined motor, comprising a motor housing, a motor shaft rotatably mounted in the motor housing, a rotor synchronously mounted on the motor shaft, and a stator adapted to the rotor, wherein one end of the motor shaft passes out of the motor housing, the stator is fixedly mounted in the motor housing and surrounds the rotor, and is characterized in that: The rotor includes at least one intermediate iron core which is synchronously rotated and mounted side by side on the motor shaft, and two end iron cores which are symmetrically arranged at both ends of all the intermediate iron cores. Each intermediate iron core and each end iron core are circumferentially evenly distributed with the same number of permanent magnets. The intermediate iron core is formed by stacking a plurality of intermediate magnetic steel sheets which are arranged side by side along the axial direction of the motor shaft, and the end iron core is formed by stacking a plurality of end magnetic steel sheets which are arranged side by side along the axial direction of the motor shaft. Both the intermediate magnetic steel sheets and the end magnetic steel sheets are annular sheet structures, and the outer diameter of the intermediate magnetic steel sheet is equal to the outer diameter of the end magnetic steel sheet, and the inner diameter of the intermediate magnetic steel sheet is smaller than the inner diameter of the end magnetic steel sheet, so that annular clearance grooves are formed between the two end iron cores and the motor shaft.

2. The integrated combined motor according to claim 1, characterized in that: The permanent magnets of the end cores and the middle cores which are sequentially arranged in the axial direction are staggered at equal intervals in the same direction in the circumferential direction.

3. The integrated combined motor according to claim 2, characterized in that: The staggered angle of the permanent magnets between adjacent middle cores or between adjacent end cores and middle cores is greater than 0° and less than or equal to 5°.

4. The integrated combined motor according to any one of claims 1 to 3, characterized in that: Each end iron core and each intermediate iron core are locked together by multiple first threaded fasteners that penetrate along the axial direction. Each first threaded fastener is evenly distributed around the motor shaft along the circumferential direction. The end iron core and the intermediate iron core are each provided with bolt positioning holes with the same number as the first threaded fasteners. The bolt positioning holes of the end iron cores and the intermediate iron cores that are arranged sequentially in the axial direction are penetrated in sequence, and the spacing between the bolt positioning holes of the end iron cores and the intermediate iron cores that are arranged sequentially in the axial direction and adjacent permanent magnets increases or decreases in an arithmetic progression. After each first threaded fastener is distributed and passes through the corresponding bolt positioning holes, all the end iron cores and the intermediate iron cores are locked together.

5. The integrated combined motor according to claim 4, characterized in that: The outer end surfaces of the two end iron cores are covered with dynamic balancing covers, and the two dynamic balancing covers, the two end iron cores and all the middle iron cores are fastened together by a plurality of the first threaded fasteners.

6. The integrated combined motor according to claim 5, characterized in that: The two dynamic balancing cover plates have cover plate sunken sections near their inner edges that are sunken into corresponding give-way grooves. The two cover plate sunken sections are respectively covered on the outer end surfaces of the two intermediate iron cores located at the ends. The two cover plate sunken sections and all the intermediate iron cores are locked together by multiple second threaded fasteners that penetrate along the axial direction. The second threaded fasteners are evenly distributed along the circumference of the motor shaft.

7. The integrated combined motor according to claim 1, characterized in that: The motor shaft is radially protruded with an annular mounting section that is compatible with the intermediate iron core, and the annular mounting section is recessed with at least one mounting groove that penetrates the annular mounting section axially. The inner edge of each intermediate magnetic steel sheet is protruded with a mounting protrusion that corresponds to each mounting groove, and each mounting protrusion is respectively embedded in the corresponding mounting groove.

8. The integrated combined motor according to claim 1, characterized in that: The middle iron core and the end iron core are both provided with a plurality of permanent magnet mounting holes distributed along the circumference of the motor shaft, and any two adjacent permanent magnet mounting holes are arranged in a "V" shape. The permanent magnet mounting holes all penetrate the corresponding middle iron core or the end iron core, and a permanent magnet is embedded in each permanent magnet mounting hole.

9. The integrated combined motor according to claim 1, characterized in that: The intermediate core is provided with a plurality of axially penetrating heat dissipation holes, the heat dissipation holes of each intermediate core are sequentially connected along the axial direction, and the heat dissipation holes of the intermediate cores at both ends are respectively connected with the corresponding annular relief grooves.

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