Integrated motor rotor assembly, motor, and vehicle

Abstract

The utility model discloses an integrated motor rotor assembly, motor and vehicle, the integrated motor rotor assembly includes rotor shaft, still includes the reducer input cover axle, first bearing and rotor main part who sets gradually along the axial direction of rotor shaft, the reducer input cover axle with the rotor shaft passes through detachable locking assembly connection, the first bearing is covered in rotor shaft, and rotor main part with the rotor shaft is connected in the coaxial synchronous rotation mode. The motor includes above -mentioned integrated motor rotor assembly. The vehicle includes above -mentioned motor. The utility model can reduce the restriction to bearing selection type, is favorable to motor light weight, and can reduce the axial total size of motor rotor assembly.

Description

Technical Field

[0001] This utility model relates to a vehicle drive device, specifically to an integrated motor rotor assembly, a motor, and a vehicle. Background Technology

[0002] With the large-scale application of new energy vehicles, motor technology is also developing rapidly, leading to higher requirements for space and cost. Smaller axial space allows for greater integration of the entire motor and more layout options in the vehicle. One mainstream solution is to design the motor rotor shaft and the reducer input shaft separately and then assemble them together. This typically involves two bearings on the motor rotor shaft and one or two bearings on the reducer input shaft, resulting in a relatively large axial space occupation for both the motor rotor assembly and the reducer input shaft, as well as a large number of bearings. Another mainstream solution is to integrate the motor rotor shaft and the reducer input shaft. To avoid interference during assembly, the inner diameter of the bearing needs to be larger than the maximum outer diameter of the reducer input shaft, which limits bearing selection and results in larger bearings, affecting the overall weight of the motor and hindering vehicle lightweighting. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide an integrated motor rotor assembly, motor, and vehicle, which can reduce the restrictions on bearing selection, facilitate motor weight reduction, and reduce the overall axial dimension of the motor rotor assembly. An integrated motor rotor assembly according to the present invention includes a rotor shaft, and further includes a reducer input sleeve shaft, a first bearing and a rotor body arranged sequentially along the axial direction of the rotor shaft. The reducer input sleeve shaft is connected to the rotor shaft by a detachable locking assembly. The first bearing is sleeved on the rotor shaft. The rotor body and the rotor shaft are connected in a manner that enables them to rotate coaxially and synchronously.

[0004] Furthermore, the rotor shaft includes a first shaft segment and a second shaft segment arranged sequentially along the axial direction, the outer diameter of the second shaft segment being larger than the outer diameter of the first shaft segment; the reducer input sleeve shaft includes a first set of shaft segments and a second set of shaft segments arranged sequentially along the axial direction, the inner diameter of the first set of shaft segments being larger than the inner diameter of the second set of shaft segments; the first set of shaft segments is located outside the first shaft segment, the detachable locking assembly is disposed between the first shaft segment and the first set of shaft segments, and the second set of shaft segments is connected to the second shaft segment in a manner that enables coaxial and synchronous rotation.

[0005] Furthermore, the detachable locking assembly includes a washer and a locking nut arranged sequentially along the axial direction, and the first shaft segment is provided with an external thread for connecting with the locking nut.

[0006] Furthermore, the outer circumference of the locking nut is provided with multiple locking force grooves at intervals.

[0007] Furthermore, the rotor shaft also includes a third shaft segment, the outer diameter of which is larger than the outer diameter of the second shaft segment, and the third shaft segment is located on the side of the second shaft segment away from the first shaft segment; the reducer input sleeve shaft also includes a third shaft segment, the inner diameter of which is larger than the inner diameter of the second shaft segment, and the third shaft segment and the first bearing are both sleeved on the third shaft segment.

[0008] Furthermore, the rotor shaft also includes a fourth shaft segment, a fifth shaft segment, a sixth shaft segment, and a seventh shaft segment arranged sequentially along the axial direction. The outer diameters of the third shaft segment, the fourth shaft segment, and the fifth shaft segment increase sequentially, and the outer diameters of the fifth shaft segment, the sixth shaft segment, and the seventh shaft segment decrease sequentially. The fourth shaft segment is located on the side of the third shaft segment away from the second shaft segment. The first bearing is fixed between the fourth shaft segment and the third shaft segment. The rotor body is sleeved on the sixth shaft segment. The fifth shaft segment has a flange structure, and the rotor body is connected to the flange structure by multiple bolts.

[0009] Furthermore, it also includes a second bearing, which is fitted over the seventh shaft segment; the outer rings of both the first bearing and the second bearing are used to connect to the motor housing.

[0010] Furthermore, the rotor shaft is provided with an axial lubrication channel and multiple sets of radial lubrication channels inside. The axial lubrication channel runs through the shaft along the axial direction, and the multiple sets of radial lubrication channels are spaced apart along the axial direction. Each set of radial lubrication channels includes multiple radial lubrication holes spaced apart along the circumference. One end of each radial lubrication hole is connected to the axial lubrication channel, and the other end of each radial lubrication hole is connected to the outside.

[0011] The present invention provides an electric motor characterized in that it includes the aforementioned integrated motor rotor assembly.

[0012] One type of vehicle according to this utility model includes the aforementioned motor.

[0013] The beneficial effects of this utility model are: (1) The reducer input sleeve shaft and the rotor shaft of this utility model are connected by a detachable locking assembly. During assembly, the first bearing is installed first and then the reducer input sleeve shaft is installed. Therefore, the size of the reducer input sleeve shaft does not affect the selection of the first bearing. The inner diameter of the first bearing can be smaller than the maximum outer diameter of the reducer input sleeve shaft, which can reduce the restriction on the selection of the first bearing. The smaller size of the first bearing can help to reduce the weight of the motor.

[0014] (2) The reducer input sleeve shaft of this utility model is integrated on the rotor shaft. The rotor body drives the rotor shaft to rotate, and the rotor shaft drives the reducer input sleeve shaft to rotate. The rotor shaft can provide support and limit for the reducer input sleeve shaft. The reducer input sleeve shaft does not need to be designed with a journal for connection with the bearing. The axial length of the reducer input sleeve shaft is reduced, thereby reducing the axial total dimension of the reducer input sleeve shaft and the rotor shaft of the motor rotor assembly. Attached Figure Description

[0015] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the following drawings are provided for illustration: Figure 1 This is an exploded view of the integrated motor rotor assembly of this utility model; Figure 2 This is one of the structural schematic diagrams of the integrated motor rotor assembly of this utility model; Figure 3 This is the second structural schematic diagram of the integrated motor rotor assembly of this utility model; Figure 4 This is a cross-sectional schematic diagram of the integrated motor rotor assembly of this utility model; Figure 5 This is a cross-sectional schematic diagram of the rotor shaft of this utility model; Figure 6 This is a cross-sectional schematic diagram of the input sleeve shaft of the reducer of this utility model; Figure 7 This is a schematic diagram of the locking nut of this utility model.

[0016] The following labels are shown in the attached diagram: 1-Rotor shaft, 101-First shaft segment, 102-Second shaft segment, 103-Third shaft segment, 104-Fourth shaft segment, 105-Fifth shaft segment, 106-Sixth shaft segment, 107-Seventh shaft segment, 108-Axial lubrication oil passage, 109-Radial lubrication oil hole, 110-Annular groove oil passage; 2-Reducer input shaft, 201-First shaft section, 202-Second shaft section, 203-Third shaft section; 3-First bearing, 301-Bearing inner ring oil hole; 4-Rotor body, 401-Frame, 402-Carbon fiber retaining ring, 403-Magnet; 5-Removable locking assembly, 501-Washer, 502-Locking nut, 5021-Locking force groove; 6-Second bearing; 7- Bolt. Detailed Implementation

[0017] The technical solution of this utility model will be described in detail below with reference to the accompanying drawings and embodiments.

[0018] like Figures 1-7 As shown, an integrated motor rotor assembly in this embodiment includes a rotor shaft 1, a reducer input sleeve 2, a first bearing 3, and a rotor body 4 arranged sequentially along the axial direction of the rotor shaft 1. The reducer input sleeve 2 is connected to the rotor shaft 1 by a detachable locking assembly 5. The first bearing 3 is sleeved on the rotor shaft 1. The rotor body 4 is connected to the rotor shaft 1 in a manner that enables coaxial and synchronous rotation.

[0019] The rotor body 4 includes a frame 401, a carbon fiber retaining ring 402, and multiple magnets 403. The frame 401 has multiple spokes spaced apart circumferentially, and an installation groove is formed between two adjacent spokes. The multiple magnets 403 are respectively installed in the installation groove. The carbon fiber retaining ring 402 can radially position the magnets 403. The carbon fiber retaining ring 402 is sleeved on the spokes and the magnets 403.

[0020] The rotor shaft 1, the reducer input sleeve shaft 2, the first bearing 3, and the rotor body 4 have the same axis, so the axial direction can be along the axis of the rotor shaft 1.

[0021] On the one hand, the reducer input sleeve shaft 2 is connected to the rotor shaft 1 via a detachable locking assembly 5. During assembly, the first bearing 3 is installed first, followed by the reducer input sleeve shaft 2. Therefore, the size of the reducer input sleeve shaft 2 does not affect the selection of the first bearing 3. The inner diameter of the first bearing 3 can be smaller than the maximum outer diameter of the reducer input sleeve shaft 2, which reduces the restrictions on the selection of the first bearing 3. The smaller size of the first bearing 3 is beneficial for the weight reduction of the motor. On the other hand, the reducer input sleeve shaft 2 is integrated on the rotor shaft 1. The rotor body 4 drives the rotor shaft 1 to rotate, and the rotor shaft 1 drives the reducer input sleeve shaft 2 to rotate. The rotor shaft 1 can provide support and limit for the reducer input sleeve shaft 2. The reducer input sleeve shaft 2 does not need to be designed with a journal for connection with the bearing, and the axial length of the reducer input sleeve shaft 2 is reduced, thereby reducing the overall axial dimension of the reducer input sleeve shaft 2 and the rotor shaft 1 of the motor rotor assembly.

[0022] In this embodiment, the rotor shaft 1 includes a first shaft segment 101 and a second shaft segment 102 arranged sequentially along the axial direction, wherein the outer diameter of the second shaft segment 102 is larger than the outer diameter of the first shaft segment 101; the reducer input sleeve shaft 2 includes a first sleeve shaft segment 201 and a second sleeve shaft segment 202 arranged sequentially along the axial direction, wherein the inner diameter of the first sleeve shaft segment 201 is larger than the inner diameter of the second sleeve shaft segment 202; the first sleeve shaft segment 201 is located outside the first shaft segment 101, the detachable locking assembly 5 is disposed between the first shaft segment 101 and the first sleeve shaft segment 201, and the second sleeve shaft segment 202 is connected to the second shaft segment 102 in a manner that enables coaxial and synchronous rotation.

[0023] The second set of shaft segments 202 and the second set of shaft segments 102 can be connected in a way that allows them to rotate coaxially and synchronously. The second set of shaft segments 102 is provided with an external spline or a flat key, and the interior of the second set of shaft segments 202 is provided with an internal spline for cooperating with the external spline or a keyway for cooperating with the flat key.

[0024] An integrally formed gear is provided on the outside of the input sleeve shaft 2 of the reducer. This gear can be used to connect with the reducer drive, so that power can be output to the reducer through the input sleeve shaft 2 of the reducer.

[0025] The outer diameter of the second shaft segment 102 is larger than the outer diameter of the first shaft segment 101, and the inner diameter of the first set of shaft segments 201 is larger than the inner diameter of the second set of shaft segments 202. The second set of shaft segments 202 is sleeved on the second shaft segment 102. Therefore, the outer diameter of the first shaft segment 101 is smaller than the inner diameter of the first set of shaft segments 201. A space is formed between the first shaft segment 101 and the first set of shaft segments 201 that can accommodate the detachable locking assembly 5. By setting the detachable locking assembly 5 between the first shaft segment 101 and the first set of shaft segments 201, the axial total dimension of the reducer input sleeve shaft 2 and the rotor shaft 1 can be further reduced.

[0026] In this embodiment, the detachable locking assembly 5 includes a washer 501 and a locking nut 502 arranged sequentially along the axial direction, and the first shaft segment 101 is provided with an external thread for connecting with the locking nut 502.

[0027] The gasket 501 is sleeved on the first shaft section 101. By rotating the locking nut 502, it moves axially until the gasket 501 abuts against the end of the second shaft section 202, which can apply pressure to the second shaft section 202, so that the second shaft section 202 abuts against the end of the third shaft section 103, thereby fixing the second shaft section 202 between the third shaft section 103 and the gasket 501, thereby achieving axial positioning of the reducer input shaft 2.

[0028] In this embodiment, the outer circumference of the locking nut 502 is provided with a plurality of locking force grooves 5021 at intervals.

[0029] The locking nut 502 is located between the first shaft section 101 and the first set of shaft sections 201. Conventional nuts are not convenient to apply torque to make them rotate. The outer circle of the locking nut 502 is provided with multiple locking force grooves 5021 at intervals along the circumference. The locking nut 502 can be rotated by inserting an external tool into the multiple locking force grooves 5021.

[0030] In this embodiment, the rotor shaft 1 further includes a third shaft segment 103, the outer diameter of which is larger than the outer diameter of the second shaft segment 102, and the third shaft segment 103 is located on the side of the second shaft segment 102 away from the first shaft segment 101; the reducer input sleeve shaft 2 further includes a third sleeve shaft segment 203, the inner diameter of which is larger than the inner diameter of the second sleeve shaft segment 202, and the third sleeve shaft segment 203 and the first bearing 3 are both sleeved on the third shaft segment 103.

[0031] The third shaft segment 103 is used to provide a limiting surface for the end of the second shaft segment 202 away from the gasket 501.

[0032] In this embodiment, the rotor shaft 1 further includes a fourth shaft segment 104, a fifth shaft segment 105, a sixth shaft segment 106, and a seventh shaft segment 107 arranged sequentially along the axial direction. The outer diameters of the third shaft segment 103, the fourth shaft segment 104, and the fifth shaft segment 105 increase sequentially, while the outer diameters of the fifth shaft segment 105, the sixth shaft segment 106, and the seventh shaft segment 107 decrease sequentially. The fourth shaft segment 104 is located on the side of the third shaft segment 103 away from the second shaft segment 102. The first bearing 3 is fixed between the fourth shaft segment 104 and the third shaft segment 203. The rotor body 4 is sleeved on the sixth shaft segment 106. The fifth shaft segment 105 has a flange structure, and the rotor body 4 is connected to the flange structure by a plurality of bolts 7.

[0033] The fifth shaft segment 105 and the third shaft segment 203 abut against different sides of the first bearing 3 respectively, which can axially limit the first bearing 3.

[0034] The fifth shaft section 105 has a flange structure with multiple threaded holes spaced circumferentially on the flange structure. The main body of the rotating shaft has through holes, and multiple bolts 7 pass through the through holes and connect to the threaded holes, so that the rotor body 4 and the rotor shaft 1 can be connected in a way that allows them to rotate coaxially and synchronously.

[0035] In this embodiment, a second bearing 6 is also included, which is sleeved on the seventh shaft segment 107; the outer rings of the first bearing 3 and the second bearing 6 are both used to connect to the motor housing.

[0036] The rotor shaft 1, reducer input sleeve shaft 2, first bearing 3, rotor body 4, gasket 501, lock nut 502, and second bearing 6 are assembled together and shipped as a single unit. The inner ring of the second bearing 6 is fixed to the seventh shaft section 107 with an interference fit.

[0037] The first bearing 3 can be two single-row angular contact ball bearings placed back-to-back, which can effectively withstand bidirectional axial loads and has strong resistance to deformation. The second bearing 6 can be a common deep groove ball bearing. Of course, the type and quantity of the first bearing 3 and the second bearing 6 can be flexibly rotated according to the needs of the motor housing, and are not limited to the types and quantities mentioned above.

[0038] In this embodiment, the rotor shaft 1 is provided with an axial lubrication channel 108 and multiple sets of radial lubrication channels inside. The axial lubrication channel 108 is axially continuous, and the multiple sets of radial lubrication channels are spaced apart axially. Each set of radial lubrication channels includes multiple radial lubrication holes 109 spaced apart circumferentially. One end of each radial lubrication hole 109 is connected to the axial lubrication channel 108, and the other end of each radial lubrication hole 109 is connected to the outside.

[0039] After the lubricating oil enters the axial lubrication passage 108, when the rotor shaft 1 rotates, the lubricating oil enters the first bearing 3, the second bearing 6, or other positions through the radial lubrication holes 109, thereby lubricating and cooling the first bearing 3 and the second bearing 6. At the same time, the axial lubrication passage 108 runs axially, so the lubricating oil can also flow to the reducer.

[0040] When the first bearing 3 consists of two single-row angular contact ball bearings placed back to back, an inner ring oil hole 301 is provided on the opposite side of the two single-row angular contact ball bearings. An annular groove oil passage 110 is provided on the outer wall of the third shaft section 103. The position of the annular groove oil passage 110 corresponds to the position of the inner ring oil hole 301. The radial lubrication oil hole 109 of one set of radial lubrication oil passages is connected to the annular groove oil passage 110. The lubricating oil of the axial lubrication oil passage 108 can flow through these radial lubrication oil holes 109 to the annular groove oil passage 110, and then flow from the annular groove oil passage 110 to the inner ring oil hole 301, and finally flow into the interior of the first bearing 3. This structure can reduce the positional requirements of the first bearing 3 in the circumferential direction by transferring lubricating oil through the annular groove oil passage 110, and does not require the inner ring oil hole 301 to correspond to the radial lubrication oil hole 109.

[0041] The motor in this embodiment is characterized by including the above-mentioned integrated motor rotor assembly.

[0042] One type of vehicle in this embodiment includes the aforementioned motor. The vehicle can be, but is not limited to, a pure electric vehicle / battery electric vehicle (PEV / BEV), a hybrid electric vehicle (HEV), a range-extended electric vehicle (REEV), a plug-in hybrid electric vehicle (PHEV), a new energy vehicle, or a gasoline-powered vehicle.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An integrated motor rotor assembly, comprising a rotor shaft (1), characterized in that: It also includes a reducer input sleeve shaft (2), a first bearing (3) and a rotor body (4) arranged sequentially along the axial direction of the rotor shaft (1). The reducer input sleeve shaft (2) is connected to the rotor shaft (1) by a detachable locking assembly (5). The first bearing (3) is sleeved on the rotor shaft (1). The rotor body (4) is connected to the rotor shaft (1) in a manner that enables it to rotate synchronously on the same axis.

2. The integrated motor rotor assembly according to claim 1, characterized in that: The rotor shaft (1) includes a first shaft segment (101) and a second shaft segment (102) arranged sequentially along the axial direction. The outer diameter of the second shaft segment (102) is larger than the outer diameter of the first shaft segment (101). The reducer input sleeve shaft (2) includes a first sleeve shaft segment (201) and a second sleeve shaft segment (202) arranged sequentially along the axial direction. The inner diameter of the first sleeve shaft segment (201) is larger than the inner diameter of the second sleeve shaft segment (202). The first sleeve shaft segment (201) is located outside the first shaft segment (101). The detachable locking assembly (5) is disposed between the first shaft segment (101) and the first sleeve shaft segment (201). The second sleeve shaft segment (202) and the second shaft segment (102) are connected in a manner that enables them to rotate coaxially and synchronously.

3. The integrated motor rotor assembly according to claim 2, characterized in that: The detachable locking assembly (5) includes a washer (501) and a locking nut (502) arranged sequentially along the axial direction, and the first shaft segment (101) is provided with an external thread for connecting with the locking nut (502).

4. The integrated motor rotor assembly according to claim 3, characterized in that: The outer circumference of the locking nut (502) is provided with a plurality of locking force grooves (5021).

5. The integrated motor rotor assembly according to any one of claims 2-4, characterized in that: The rotor shaft (1) further includes a third shaft section (103), the outer diameter of which is greater than the outer diameter of the second shaft section (102), and the third shaft section (103) is located on the side of the second shaft section (102) away from the first shaft section (101); the reducer input sleeve shaft (2) further includes a third shaft section (203), the inner diameter of which is greater than the inner diameter of the second shaft section (202), and the third shaft section (203) and the first bearing (3) are both sleeved on the third shaft section (103).

6. The integrated motor rotor assembly according to claim 5, characterized in that: The rotor shaft (1) further includes a fourth shaft segment (104), a fifth shaft segment (105), a sixth shaft segment (106), and a seventh shaft segment (107) arranged sequentially along the axial direction. The outer diameters of the third shaft segment (103), the fourth shaft segment (104), and the fifth shaft segment (105) increase sequentially, while the outer diameters of the fifth shaft segment (105), the sixth shaft segment (106), and the seventh shaft segment (107) decrease sequentially. The fourth shaft segment (104) is located on the side of the third shaft segment (103) away from the second shaft segment (102). The first bearing (3) is fixed between the fourth shaft segment (104) and the third shaft segment (203). The rotor body (4) is sleeved on the sixth shaft segment (106). The fifth shaft segment (105) has a flange structure, and the rotor body (4) is connected to the flange structure by multiple bolts (7).

7. The integrated motor rotor assembly according to claim 6, characterized in that: It also includes a second bearing (6), which is fitted over the seventh shaft segment (107); the outer rings of the first bearing (3) and the second bearing (6) are both used to connect to the motor housing.

8. The integrated motor rotor assembly according to claim 1, characterized in that: The rotor shaft (1) is provided with an axial lubrication channel (108) and multiple sets of radial lubrication channels inside. The axial lubrication channel (108) is axially continuous, and the multiple sets of radial lubrication channels are spaced apart along the axial direction. Each set of radial lubrication channels includes multiple radial lubrication holes (109) spaced apart along the circumference. One end of each radial lubrication hole (109) is connected to the axial lubrication channel (108), and the other end of each radial lubrication hole (109) is connected to the outside.

9. An electric motor, characterized in that: Including the integrated motor rotor assembly as described in any one of claims 1-8.

10. A vehicle, characterized in that: Includes the motor as described in claim 9.

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