Disc type motor and automobile

Abstract

The utility model provides a disc type motor and an automobile, and relates to the automobile part technology field, the disc type motor comprises a rotating shaft, a first bearing, a second bearing, a stator assembly, a first rotor assembly and a second rotor assembly, the stator assembly is penetrated along the axial direction to form a bearing chamber, the first bearing and the second bearing are sleeved on the rotating shaft at intervals, and the second bearing is sleeved on the first rotor assembly. The first bearing and the second bearing are used for being installed in the bearing chamber, the first rotor assembly is arranged at the end, close to the first bearing, of the rotating shaft, and the second rotor assembly is arranged at the end, close to the second bearing, of the rotating shaft. According to the scheme of the utility model, since the bearing is arranged between the rotating shaft and the stator assembly, when the rotor assemblies are subjected to dynamic balance operation, end covers on two sides do not need to be arranged, and the magnetic field of the motor assembly is utilized to drive the first rotor assembly and the second rotor assembly to move so as to simultaneously carry out dynamic balance operation on the two rotor assemblies; and the influence of assembly on a dynamic balance result is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts, in particular to a disc-type motor and an automobile. Background Art

[0002] As the power requirements of electric vehicles continue to increase, the torque density of the drive motor also increases. One way to increase the torque density is to increase the torque output of the motor under the same volume. Dual-rotor disc motors are widely used in the market due to their higher torque output.

[0003] The existing dual-rotor disc motor generally includes a rotating shaft, a stator, two rotors, two bearings and two end covers. The stator and the two rotors are all sleeved on the rotating shaft, and the two rotors are respectively located on both sides of the axial direction of the stator. The two ends of the rotating shaft are rotatably connected to the end covers through corresponding bearings. Since the dynamic balancing operation of the rotors must be performed after the bearings are assembled, and the bearings are arranged between the end covers and the rotating shaft, that is, the dynamic balancing operation must be performed after the end covers are assembled, therefore, the rotors on both sides usually need to be dynamically balanced separately. Specifically, the stator and the rotor, bearings and end covers on one side of the stator must be removed before the dynamic balancing operation can be performed on the rotor on the other side. Afterwards, the rotor that has completed the dynamic balancing operation and the bearings and end covers on the corresponding side are removed, and the rotor that has not undergone the dynamic balancing operation and the bearings and end covers on the corresponding side are installed, so as to realize the dynamic balancing operation of the two rotors separately. However, in this way, the mutual influence between the two rotors is not considered, resulting in low overall dynamic balancing adjustment accuracy, and the rotor, bearings and end covers need to be repeatedly disassembled and assembled, and the entire dynamic balancing process is relatively complicated. Utility Model Content

[0004] The utility model aims to solve the technical problem that the existing disc-type motor has low dynamic balancing accuracy.

[0005] On the one hand, the utility model provides a disc motor, including a rotating shaft, a first bearing, a second bearing, a stator assembly, a first rotor assembly and a second rotor assembly, the interior of the stator assembly is penetrated axially to form a bearing chamber, the first bearing and the second bearing are spaced apart and sleeved on the rotating shaft, and the first bearing and the second bearing are respectively used to be installed in the bearing chamber, the first rotor assembly is arranged at one end of the rotating shaft close to the first bearing, and the second rotor assembly is arranged at one end of the rotating shaft close to the second bearing.

[0006] In the disc motor of the utility model, the rotating shaft is assembled with the bearing chamber of the stator assembly through the first bearing and the second bearing, and then the first rotor assembly and the second rotor assembly are respectively sleeved on both sides of the rotating shaft and the stator assembly. Since the bearing is arranged between the rotating shaft and the stator assembly, when the rotor assembly is dynamically balanced, it is not necessary to set the end covers on both sides. The magnetic field of the motor assembly itself is used to drive the first rotor assembly and the second rotor assembly to rotate simultaneously, and the unbalanced position of the two rotor assemblies is detected to perform dynamic balancing operations on the two rotor assemblies at the same time. The disc motor described in the utility model can realize the simultaneous dynamic balancing of the two rotor assemblies. Compared with the existing operation method of dynamically balancing the two rotor assemblies separately, it can fully consider the mutual influence between the rotor assemblies, reduce the influence of assembly on the dynamic balancing result, and improve the overall dynamic balancing accuracy. There is no need to repeatedly disassemble and assemble the rotor assembly, and the dynamic balancing operation process is simpler and more convenient. At the same time, since the first bearing and the second bearing are located in the same bearing chamber, when the rotating shaft passes through the bearing chamber along the calibrated direction, the first bearing and the second bearing thereon can be installed in the bearing chamber at the same time, and the installation method is simple.

[0007] Optionally, the bearing chamber is in a two-stage stepped shape along the axial direction to form a large-end chamber and a small-end chamber, the small-end chamber matches the size of the first bearing, and the large-end chamber matches the size of the second bearing.

[0008] Optionally, a limiting step surface is formed at the connection between the large end chamber and the small end chamber, and one end of the second bearing abuts against the limiting step surface.

[0009] Optionally, the circumferential side wall of the rotating shaft protrudes radially outward to form a limiting boss, and the first bearing and the second bearing are respectively located on both sides of the limiting boss.

[0010] Optionally, two ends of the first bearing and the second bearing facing each other are respectively in contact with the limiting boss, and a surface of the limiting boss close to the second bearing is in the same plane as the limiting step surface.

[0011] Optionally, the second bearing comprises two angular contact ball bearings arranged back to back, and the first bearing is a deep groove ball bearing.

[0012] Optionally, the first bearing and the second bearing are both angular contact ball bearings and are arranged back to back; or, the first bearing and the second bearing are both deep groove ball bearings; or, one of the first bearing and the second bearing is a deep groove ball bearing and the other is an angular contact ball bearing.

[0013] Optionally, the disc motor further includes a first end cover and a second end cover, wherein the first end cover and the second end cover are respectively arranged on both axial sides of the stator assembly, and at least one of the first end cover and the second end cover is provided with a through hole extending axially therethrough, and the end of the rotating shaft is used to pass through the corresponding through hole.

[0014] Optionally, the first rotor assembly is provided with a first mounting hole, and the second rotor assembly is provided with a second mounting hole, the first mounting hole and the second mounting hole are respectively matched with the rotating shaft, and two ends of the rotating shaft are respectively inserted into the first mounting hole and the second mounting hole along the axial direction.

[0015] On the other hand, the utility model provides a car, comprising the above-mentioned disc motor. The advantages of the car compared with the prior art are the same as those of the above-mentioned disc motor, and will not be described again. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A cross-sectional view of a disc motor according to an embodiment of the utility model;

[0017] Figure 2 It is a schematic diagram of the exploded structure of the disc motor according to an embodiment of the utility model;

[0018] Figure 3 It is a schematic diagram of the assembly of the first bearing, the second bearing and the rotating shaft according to an embodiment of the utility model.

[0019] Description of reference numerals:

[0020] 1. Rotating shaft; 11. Limiting boss; 2. First bearing; 3. Second bearing; 4. Stator assembly; 41. Bearing chamber; 42. Limiting step surface; 5. First rotor assembly; 51. First mounting hole; 6. Second rotor assembly; 61. Second mounting hole; 7. First end cover; 8. Second end cover. DETAILED DESCRIPTION

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0022] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "matched" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] In addition, it should be noted that in the description of the present invention, it should be noted that the terminology nouns in the various embodiments, such as "upper", "lower", "front", "back" and other words indicating directions, are only for simplifying the description of the positional relationship based on the drawings in the specification, and do not mean that the components and devices referred to must be operated in accordance with the specific directions and specified operations and methods and structures in the specification. Such directional nouns do not constitute a limitation on the present invention.

[0024] In this article, a Y-axis is established, wherein the positive direction of the Y-axis represents the left direction, and the negative direction of the Y-axis represents the right direction. It should also be noted that the aforementioned Y-axis representation is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0025] like Figure 1-3 As shown, a disc motor according to an embodiment of the utility model comprises a rotating shaft 1, a first bearing 2, a second bearing 3, a stator assembly 4, a first rotor assembly 5 and a second rotor assembly 6, wherein the interior of the stator assembly 4 is penetrated axially to form a bearing chamber 41, the first bearing 2 and the second bearing 3 are sleeved on the rotating shaft 1 at intervals, and the first bearing 2 and the second bearing 3 are respectively used to be installed in the bearing chamber 41, the first rotor assembly 5 is arranged at one end of the rotating shaft 1 close to the first bearing 2, and the second rotor assembly 6 is arranged at one end of the rotating shaft 1 close to the second bearing 3.

[0026] Specifically, the rotating shaft 1 extends in the direction indicated by the Y axis, the rotating shaft 1 is coaxially arranged with the stator assembly 4, the first rotor assembly 5 and the second rotor assembly 6, the first bearing 2 and the second bearing 3 are arranged at intervals on the rotating shaft 1, and the force distribution is more uniform. The bearing chamber 41 of the stator assembly 4 is used to simultaneously install the first bearing 2 and the second bearing 3, and the rotating shaft 1 can rotate relative to the stator assembly 4 through the first bearing 2 and the second bearing 3.

[0027] When installing the disc motor of the utility model, the rotating shaft 1 is assembled with the stator assembly 4 through the first bearing 2 and the second bearing 3, and then the first rotor assembly 5 and the second rotor assembly 6 are respectively sleeved on both sides of the rotating shaft 1 and the stator assembly 4. Since the bearings are arranged between the rotating shaft 1 and the stator assembly 4, when performing dynamic balancing operation on the rotor assembly, it is not necessary to set the end covers on both sides. The first rotor assembly 5 and the second rotor assembly 6 are driven to rotate simultaneously by the magnetic field of the motor assembly itself, and the unbalanced positions of the two rotor assemblies are detected to perform dynamic balancing operation on the two rotor assemblies at the same time. The disc motor described in the utility model can realize the simultaneous dynamic balancing of the two rotor assemblies. Compared with the existing operation mode of performing dynamic balancing on the two rotor assemblies separately, it can fully consider the mutual influence between the rotor assemblies, reduce the influence of assembly on the dynamic balancing result, improve the overall dynamic balancing accuracy, and do not need to repeatedly disassemble and assemble the rotor assembly, so the dynamic balancing operation process is simpler and more convenient. At the same time, the rotating shaft 1 and the stator assembly 4 are assembled through the first bearing 2 and the second bearing 3, which can make the rotating shaft 1 more stable when running at high speed and avoid shaking. In addition, since the first bearing 2 and the second bearing 3 are both located in the same bearing chamber 41 of the stator assembly 4, when the rotating shaft 1 passes through the bearing chamber 41 along the calibrated direction, the first bearing 2 and the second bearing 3 thereon can be installed in the bearing chamber 41 at the same time, and the installation method is simple.

[0028] like Figure 1 As shown, optionally, the bearing chamber 41 is in a two-stage stepped shape along the axial direction to form a large-end chamber and a small-end chamber, the small-end chamber matches the size of the first bearing 2 , and the large-end chamber matches the size of the second bearing 3 .

[0029] Specifically, the bearing chamber 41 can be a two-stage stepped hole structure. Assuming that the end of the bearing chamber 41 close to the positive direction of the Y-axis is the small end chamber of the bearing chamber 41, and the end of the bearing chamber 41 close to the negative direction of the Y-axis is the large end chamber of the bearing chamber 41, the internal shape of the small end chamber matches the external shape of the first bearing 2 for installing the first bearing 2, and the internal shape of the large end chamber matches the external shape of the second bearing 3 for installing the second bearing 3.

[0030] After the rotating shaft 1 is assembled with the first bearing 2 and the second bearing 3, the assembly of the three is passed through the bearing chamber 41 from the negative direction of the Y axis to the positive direction of the Y axis until the first bearing 2 is located in the small end chamber of the bearing chamber 41 and the second bearing 3 is located in the large end chamber of the bearing chamber 41, thereby achieving the assembly between the rotating shaft 1 and the stator assembly 4.

[0031] like Figure 1 As shown, optionally, a limiting step surface 42 is formed at the connection between the large end chamber and the small end chamber, and one end of the second bearing 3 abuts against the limiting step surface 42 .

[0032] In this embodiment, when the rotating shaft 1 passes through the bearing chamber 41, the left end surface of the outer ring of the second bearing 3 can be used to abut against the limiting step surface 42 to achieve the installation of the rotating shaft 1 in place and improve the installation accuracy.

[0033] like Figure 1 , 3 As shown, optionally, the circumferential side wall of the rotating shaft 1 protrudes radially outward to form a limiting boss 11 , and the first bearing 2 and the second bearing 3 are respectively located on both sides of the limiting boss 11 .

[0034] Specifically, the limiting boss 11 is an annular boss, which is used to separate the rotating shaft 1 into two parts along the axial direction. The first bearing 2 can be inserted into the left end of the rotating shaft 1 from left to right, and the second bearing 3 can be inserted into the right end of the rotating shaft 1 from right to left to avoid interference.

[0035] like Figure 1 , 3 As shown, optionally, the two ends of the first bearing 2 and the second bearing 3 facing each other are respectively in contact with the limiting boss 11 , and a surface of the limiting boss 11 close to the second bearing 3 is in the same plane as the limiting step surface 42 .

[0036] Specifically, the height of the limiting boss 11 is smaller than the inner ring size of the first bearing 2 and the second bearing 3. When the first bearing 2 is assembled onto the rotating shaft 1 from left to right, the right end face of the inner ring of the first bearing 2 is abutted against the left end face of the limiting boss 11 to achieve the installation of the first bearing 2 in place; when the second bearing 3 is assembled onto the rotating shaft 1 from right to left, the left end face of the inner ring of the second bearing 3 is abutted against the right end face of the limiting boss 11 to achieve the installation of the second bearing 3 in place.

[0037] like Figure 1-3 As shown, optionally, the second bearing 3 includes two angular contact ball bearings arranged back to back, and the first bearing 2 is a deep groove ball bearing.

[0038] Specifically, the two angular contact ball bearings of the second bearing 3 are placed against each other and back to back, one of the angular contact ball bearings of the second bearing 3 abuts against the limiting step surface 42 , and one end of the second bearing 3 away from the limiting step surface 42 is roughly aligned with the bearing chamber 41 .

[0039] In this embodiment, the second bearing 3 uses two angular contact ball bearings arranged back to back, that is, the contact angles of the two angular contact ball bearings spread along the direction of the rotation axis. The two angular contact ball bearings arranged back to back can withstand axial forces in two directions, and are more stable during high-speed operation to avoid jitter. The two angular contact ball bearings are axially pre-tightened to limit the axial tilt of the rotating shaft 1 relative to the stator assembly 4. Since the first rotor assembly 5 and the second rotor assembly 6 are installed on the rotating shaft 1, the axial movement of each rotor assembly is prevented. The first bearing 2 uses a deep groove ball bearing to limit the tilt of each rotor assembly.

[0040] Optionally, the first bearing 2 and the second bearing 3 are both angular contact ball bearings and are arranged back to back; or, the first bearing 2 and the second bearing 3 are both deep groove ball bearings; or, one of the first bearing 2 and the second bearing 3 is a deep groove ball bearing and the other is an angular contact ball bearing.

[0041] In this embodiment, the first bearing 2 and the second bearing 3 are angular contact ball bearings arranged back to back and can withstand axial forces in both the positive direction and the negative direction of the Y axis, meeting the use requirements under low-speed operation.

[0042] In some other embodiments, the first bearing 2 and the second bearing 3 are both deep groove ball bearings, which can prevent the rotor assemblies from tilting and shaking at low speeds.

[0043] In some other embodiments, the first bearing 2 may be a deep groove ball bearing, and the second bearing may be an angular contact ball bearing, which can not only withstand axial force in one direction, but also prevent the rotor assembly from tilting and shaking to a certain extent, thereby meeting the use requirements under low-speed operation.

[0044] like Figure 1-2 As shown, optionally, the disc motor also includes a first end cover 7 and a second end cover 8, and the first end cover 7 and the second end cover 8 are respectively arranged on both axial sides of the stator assembly 4, and at least one of the first end cover 7 and the second end cover 8 is provided with a through hole extending axially therethrough, and the end of the rotating shaft 1 is used to pass through the corresponding through hole.

[0045] In this embodiment, the first end cover 7 and the second end cover 8 are arranged opposite to each other, and the first rotor assembly 5 can be sealed and protected by the first end cover 7, and the second rotor assembly 6 can be sealed and protected by the second end cover 8. A through hole penetrating along the axial direction can be provided only on the first end cover 7, and the left end of the rotating shaft 1 passes through the first rotor assembly 5 and then extends out of the through hole (not shown in the drawings). The right end of the rotating shaft 1 does not need to extend out of the second end cover 8, and in this case, there is no need to provide a through hole on the second end cover 8, which simplifies the processing of the second end cover 8.

[0046] Of course, in some other embodiments, through holes may be provided on both the first end cover 7 and the second end cover 8 for the left and right ends of the rotating shaft 1 to pass through. It should be noted that, according to the power output requirements of the disc motor, whether it is single-side power output or double-side power output, it can be determined whether the through hole for the rotating shaft 1 to pass through is provided on one end cover or both end covers.

[0047] like Figure 1 As shown, optionally, the first rotor assembly 5 is provided with a first mounting hole 51, and the second rotor assembly 6 is provided with a second mounting hole 61, the first mounting hole 51 and the second mounting hole 61 are respectively matched with the rotating shaft 1, and both ends of the rotating shaft 1 are respectively inserted into the first mounting hole 51 and the second mounting hole 61 along the axial direction.

[0048] Specifically, the first mounting hole 51 and the second mounting hole 61 can be circular straight holes or stepped holes, and the two ends of the rotating shaft 1 are respectively inserted into the first mounting hole 51 and the second mounting hole 61 to realize the assembly between the rotating shaft 1 and the first rotor assembly 5 and the second rotor assembly 6. The rotating shaft 1 and the first mounting hole 51 and the second mounting hole 61 can adopt an interference fit to improve the stability of the installation. In some other embodiments, the rotating shaft 1 and each rotor assembly can be fastened with bolts. The rotating shaft 1 can drive the rotor assembly to rotate together.

[0049] Another embodiment of the present invention provides a car, comprising the above-mentioned disc motor. The advantages of the car compared with the prior art are the same as those of the above-mentioned disc motor, and will not be described again.

[0050] Although the utility model is disclosed as above, the protection scope of the utility model is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the utility model, and these changes and modifications will fall within the protection scope of the utility model.

Claims

1. A disc motor, characterized in that: The invention comprises a rotating shaft (1), a first bearing (2), a second bearing (3), a stator assembly (4), a first rotor assembly (5) and a second rotor assembly (6); the interior of the stator assembly (4) is penetrated in the axial direction to form a bearing chamber (41); the first bearing (2) and the second bearing (3) are sleeved on the rotating shaft (1) with an interval, and the first bearing (2) and the second bearing (3) are respectively used to be installed in the bearing chamber (41); the first rotor assembly (5) is arranged at one end of the rotating shaft (1) close to the first bearing (2), and the second rotor assembly (6) is arranged at one end of the rotating shaft (1) close to the second bearing (3).

2. The disc motor according to claim 1, characterized in that: The bearing chamber (41) is in a two-stage stepped shape along the axial direction to form a large end chamber and a small end chamber, the small end chamber matches the size of the first bearing (2), and the large end chamber matches the size of the second bearing (3).

3. The disc motor according to claim 2, characterized in that: A limiting step surface (42) is formed at the connection between the large end chamber and the small end chamber, and one end of the second bearing (3) abuts against the limiting step surface (42).

4. The disc motor according to claim 3, characterized in that: The circumferential side wall of the rotating shaft (1) protrudes radially outward to form a limiting boss (11), and the first bearing (2) and the second bearing (3) are respectively located on both sides of the limiting boss (11).

5. The disc motor according to claim 4, characterized in that: The two ends of the first bearing (2) and the second bearing (3) facing each other are respectively in contact with the limiting boss (11), and a surface of the limiting boss (11) close to the second bearing (3) is in the same plane as the limiting step surface (42).

6. The disc motor according to claim 1, characterized in that: The second bearing (3) comprises two angular contact ball bearings arranged back to back, and the first bearing (2) is a deep groove ball bearing.

7. The disc motor according to claim 1, characterized in that: The first bearing (2) and the second bearing (3) are both angular contact ball bearings and are arranged back to back; or, the first bearing (2) and the second bearing (3) are both deep groove ball bearings; or, one of the first bearing (2) and the second bearing (3) is a deep groove ball bearing and the other is an angular contact ball bearing.

8. The disc motor according to claim 1, characterized in that: The stator assembly (4) further comprises a first end cover (7) and a second end cover (8), wherein the first end cover (7) and the second end cover (8) are respectively arranged on two axial sides of the stator assembly (4), and at least one of the first end cover (7) and the second end cover (8) is provided with a through hole extending through the axial direction, and the end of the rotating shaft (1) is used to pass through the corresponding through hole.

9. The disc motor according to claim 1, characterized in that: The first rotor assembly (5) is provided with a first mounting hole (51), and the second rotor assembly (6) is provided with a second mounting hole (61); the first mounting hole (51) and the second mounting hole (61) are respectively matched with the rotating shaft (1), and two ends of the rotating shaft (1) are respectively inserted into the first mounting hole (51) and the second mounting hole (61) along the axial direction.

10. An automobile, characterized in that: It comprises a disc motor as described in any one of claims 1 to 9.

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