CN212543588U - Coaxial type electrically-driven bridge and motor assembly of coaxial type electrically-driven bridge - Google Patents
Coaxial type electrically-driven bridge and motor assembly of coaxial type electrically-driven bridge Download PDFInfo
- Publication number
- CN212543588U CN212543588U CN202021156237.6U CN202021156237U CN212543588U CN 212543588 U CN212543588 U CN 212543588U CN 202021156237 U CN202021156237 U CN 202021156237U CN 212543588 U CN212543588 U CN 212543588U
- Authority
- CN
- China
- Prior art keywords
- oil seal
- mounting hole
- motor
- electric drive
- drive bridge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
The utility model relates to a coaxial electric drive bridge and a motor assembly of the coaxial electric drive bridge, wherein, the motor assembly of the coaxial electric drive bridge comprises a driving motor and an oil seal component; the driving motor comprises an end cover and a rotary transformer, wherein the outer wall of the end cover is provided with a mounting hole, a stator of the rotary transformer is fixed at the hole bottom of the mounting hole, and the outer diameter of the mounting hole is not smaller than the diameter of the hole bottom; the oil seal assembly comprises a motor oil seal and a half shaft oil seal which are arranged in the mounting hole. The motor assembly of the coaxial electric drive bridge is convenient for realizing zero setting operation of the rotary transformer and can reduce the cost.
Description
Technical Field
The utility model relates to an electricity drives bridge technical field, concretely relates to axle type electricity drives bridge and axle type electricity drives motor assembly of bridge.
Background
An electric drive bridge is an important core component of a new energy automobile, and the current trend is to integrate a motor and a speed reducer on the electric drive bridge at the same time. From the perspective of an integrated structure, an electric drive bridge has two major categories of an eccentric axis type and a coaxial type. In the coaxial type, a driving motor, generally a Permanent Magnet Synchronous Motor (PMSM), is integrated, so that the motor assembly process needs to be completed on an electric drive bridge, and the zero setting work of the rotary transformer is an indispensable key step.
The motor assembly of the coaxial electric drive bridge is simultaneously provided with two oil seals of a motor oil seal and a half shaft oil seal, wherein the half shaft oil seal needs to be arranged on a motor end cover and is positioned on the outermost side of the motor oil seal, so that the installation space of the rotary transformer is influenced, the rotary transformer can only be installed on the inner side of the motor end cover (one side far away from a rear axle tube), the zero setting operation of the rotary transformer cannot be realized in the assembling process, and at the moment, the problem of angular deviation can only be solved by adopting other methods. There are two general solutions available today:
one method is to adopt an instrument calibration method to calibrate each motor assembly which is assembled off-line one by one, detect the zero deflection angle of the stator of the rotary transformer, then write the numerical value of the zero deflection angle into a control program of a Motor Controller (MCU), and carry out calculation compensation through a software program, so that the motor can normally operate under the control of the MCU. However, the problem that each motor and the MCU have to be in a one-to-one correspondence is caused, and even if the motors of the same model or the MCUs of the same model are not interchangeable, the zero offset angles are different. Therefore, the production, logistics and after-sale maintenance are greatly inconvenient, and the cost is high;
the other is to adopt a self-adaptive MCU, a special software and hardware learning circuit is arranged in the MCU, the zero offset angle of the rotary transformer can be calibrated by self, and then the control program makes corresponding adjustment and adaptation, so that zero setting of the rotary transformer is not needed, but the cost of the self-adaptive MCU is several times higher than that of a common MCU, and the competitiveness of the product is greatly reduced.
Therefore, how to provide a motor assembly of a coaxial electric drive bridge, which is convenient for realizing the zero setting operation of a rotary transformer and can reduce the cost, is a technical problem to be solved by the technical personnel in the field.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a coaxial-type electricity drives bridge and coaxial-type electricity drives motor assembly of bridge, is convenient for realize resolver's zeroing operation and reduce cost.
In order to solve the technical problem, the utility model provides a motor assembly of a coaxial electric drive bridge, which comprises a drive motor and an oil seal assembly; the driving motor comprises an end cover and a rotary transformer, a mounting hole is formed in the outer wall of the end cover, a stator of the rotary transformer is fixed to the hole bottom of the mounting hole, and the outer diameter of the mounting hole is not smaller than the diameter of the hole bottom; the oil seal assembly comprises a motor oil seal and a half shaft oil seal which are arranged in the mounting hole.
The rotary transformer is located at the hole bottom of the mounting hole, the outer diameter of the mounting hole is not smaller than the diameter of the hole bottom, namely, before the oil seal assembly is mounted, the zero setting operation of the rotary transformer can be directly carried out from the outer side of the end cover, then the mounting operation of the oil seal assembly is carried out, therefore, the influence of the oil seal assembly on the zero setting operation of the rotary transformer can be avoided, the assembling operation of the oil seal assembly can be simplified, the requirement on an MCU is lowered, and the cost is lowered. Specifically, the mounting hole is a straight cylinder structure, or the mounting hole can be set to be a hole structure with a step structure, the outer diameter of the mounting hole is not smaller than the diameter of the hole bottom, and influence on zero setting operation of the rotary transformer is avoided.
In addition, because the rotary transformer is arranged in the mounting hole, compared with the rotary transformer arranged on the inner side of the end cover and closer to the outer side of the motor shaft, the diameter of the motor shaft is gradually reduced from inside to outside, and therefore, after the rotary transformer is arranged in the mounting hole, the inner diameter of a rotor of the rotary transformer can be reduced, the size of the rotary transformer can be reduced, and the cost is further reduced.
Optionally, the oil blanket subassembly still includes the oil blanket seat, the oil blanket seat is including the first mounting groove and the second mounting groove that communicate each other and coaxial setting, first mounting groove is located the inside wall of oil blanket seat is used for the installation the motor oil seal, the second mounting groove is located the lateral wall of oil blanket seat is used for the installation the semi-axis oil blanket.
Optionally, the outer end surface of the mounting hole is further provided with a first limiting structure, and the outer circular surface of the oil seal seat is further provided with a second limiting structure matched with the first limiting structure.
Optionally, the oil seal seat and the mounting hole are in clearance fit or transition fit.
Optionally, a sealing ring is further arranged between the outer circular surface of the oil seal seat and the inner wall of the mounting hole.
Optionally, the outer end surface of the oil seal seat is further provided with a screw hole.
Optionally, the oil seal seat is further provided with a weight reduction structure.
Optionally, the oil seal seat is made of cast iron, steel, aluminum alloy or nonmetal.
Optionally, the motor oil seal and the half shaft oil seal are in interference fit with the inner wall of the mounting hole respectively.
Additionally, the utility model also provides a coaxial-type electricity drive bridge, it includes as above the motor assembly.
The technical effect of the coaxial electric drive bridge with the motor assembly is similar to that of the motor assembly, and is not repeated herein for saving space.
Drawings
Fig. 1 is a schematic structural diagram of a coaxial electric drive bridge provided in an embodiment of the present invention;
FIG. 2 is a partial cross-sectional view of the oil seal assembly of FIG. 1 with an oil seal seat;
FIG. 3 is an exploded view of the motor assembly;
FIG. 4 is a schematic structural diagram of an oil seal seat;
FIG. 5 is a partial cross-sectional view of the oil seal assembly of FIG. 1 without the oil seal seat.
In the accompanying fig. 1-5, the reference numerals are illustrated as follows:
1-end cover, 11-mounting hole, 12-first limit structure;
2-an oil seal assembly, 21-a motor oil seal, 22-a half shaft oil seal, 23-an oil seal seat, 231-a first installation groove, 232-a second installation groove, 233-a second limiting structure and 234-a weight reduction structure;
3-resolver, 31-stator, 32-rotor
4-drive motor, 41-motor shaft;
5-half shaft bearings;
6-rear axle tube, 61-flange;
7-half shaft.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1-5, fig. 1 is a schematic structural diagram of a coaxial electric drive bridge according to an embodiment of the present invention; FIG. 2 is a partial cross-sectional view of the oil seal assembly of FIG. 1 with an oil seal seat; FIG. 3 is an exploded view of the motor assembly; FIG. 4 is a schematic structural diagram of an oil seal seat; FIG. 5 is a partial cross-sectional view of the oil seal assembly of FIG. 1 without the oil seal seat.
The embodiment of the utility model provides a coaxial-type electricity drives bridge and coaxial-type electricity drives motor assembly of bridge, wherein, as figure 1, figure 2 and figure 5 show, coaxial-type electricity drives the bridge and includes motor assembly, rear axle pipe 6 and half shaft bearing 5, wherein, half shaft bearing 5 is fixed with flange 61 of rear axle pipe 6, as figure 2, figure 3 and figure 5 show, motor assembly includes driving motor 4 and oil blanket subassembly 2, driving motor 4 includes end cover 1, motor shaft 41 and resolver 3, the outer wall of end cover 1 is equipped with mounting hole 11, resolver 3 includes stator 31 and rotor 32, wherein, stator 31 is fixed in the hole bottom of mounting hole 11, rotor 32 can rotate along with the motor shaft. The oil seal assembly 2 is arranged in the mounting hole 11, and the oil seal assembly 2 comprises a motor oil seal 21 and a half shaft oil seal 22. In the installed state, the motor oil seal 21 can cooperate with the motor shaft to achieve sealing, and the half shaft oil seal 22 can cooperate with the half shaft 7 to achieve sealing.
Herein, "inner" means a side facing inside the mounting hole 11, i.e., a side facing the drive motor 4, and "outer" means a side facing outside the mounting hole 11, i.e., a side facing the rear axle pipe 6. The rotary transformer 3 is located at the hole bottom of the mounting hole 11, and the outer diameter of the mounting hole 11 is not smaller than the diameter of the hole bottom, that is, before the oil seal assembly 2 is mounted, the zero setting operation of the rotary transformer 3 can be directly performed from the outer side of the end cover 1, and then the mounting operation of the oil seal assembly 2 is performed, so that the influence of the oil seal assembly 2 on the zero setting operation of the rotary transformer 3 can be avoided, the assembling operation of the oil seal assembly 2 can be simplified, the requirement on an MCU is lowered, and the cost is lowered. Specifically, as shown in fig. 3, in this embodiment, the mounting hole 11 has a straight-tube structure, or the mounting hole 11 may also have a hole structure with a step structure, and an outer diameter of the mounting hole 11 is not smaller than a diameter of a hole bottom, so as to avoid affecting a zeroing operation of the rotary transformer 3.
Further, since the resolver 3 is disposed in the mounting hole 11 and is disposed on the outer side of the motor shaft 41 than the resolver 3 is disposed on the inner side of the end cover 1, the diameter of the motor shaft 41 is gradually reduced from the inside to the outside, and therefore, the inner diameter of the rotor 32 of the resolver 3 can be reduced after the resolver 3 is disposed in the mounting hole 11, and thus, the size of the resolver 3 can be reduced and the cost can be further reduced.
In the above-mentioned embodiment, as shown in fig. 2 and fig. 3, the oil seal assembly 2 further includes the oil seal holder 23, specifically, as shown in fig. 4, the oil seal holder 23 includes a first mounting groove 231 and a second mounting groove 232 which are communicated with each other and coaxially disposed, wherein the first mounting groove 231 is disposed on the inner side wall of the oil seal holder 23 and is used for mounting the motor oil seal 21, and the second mounting groove 232 is disposed on the outer side wall of the oil seal holder 23 and is used for mounting the half-shaft oil seal 22. The motor oil seal 21, the half-shaft oil seal 22 and the oil seal seat 23 are mutually fixed and can be assembled as a whole, the relative positions of the motor oil seal 21 and the half-shaft oil seal 22 are ensured, the dismounting operation is further simplified, in addition, the first mounting groove 231 and the second mounting groove 232 can respectively provide protection for the motor oil seal 21 and the half-shaft oil seal 22, and the oil seal is not easy to damage in the dismounting process.
Alternatively, in the embodiment, as shown in fig. 5, when the half-shaft oil seal 22 and the motor oil seal 21 are installed in the installation hole 11 by interference fit, the relative fixation between the two can be ensured, and further the sealing effect can be ensured, and in order to further ensure the relative position between the two, a spacer can be further arranged between the half-shaft oil seal 22 and the motor oil seal 21. That is, it suffices to set the mounting hole 11 to a straight-tube type structure or a stepped structure and expand the outer diameters of the two oil seals so that the oil seals can be interference-fitted with the inner wall of the mounting hole 11.
When the oil seal assembly 2 is provided with the oil seal seat 23, as shown in fig. 3, the outer end face of the mounting hole 11 is further provided with a first limiting structure 12, the outer circular face of the oil seal seat 23 is further provided with a second limiting structure 233 adapted to the first limiting structure 12, when the oil seal assembly 2 is installed in the mounting hole 11, the first limiting structure 12 can be matched with the second limiting structure 233 to limit the axial direction of the oil seal assembly 2, so that the motor oil seal 21 can be matched with the motor shaft 41, and the half shaft oil seal 22 can be matched with the half shaft 7, thereby ensuring the sealing effect. Specifically, in this embodiment, the specific structures of the first limiting structure 12 and the second limiting structure 233 are not limited, as shown in fig. 3, the first limiting structure 12 may be configured as a spigot, the second limiting structure 233 is configured as an annular baffle circumferentially disposed along an outward end of the outer circumferential surface of the oil seal seat 23, or the first limiting structure 12 may also be configured as at least two limiting grooves circumferentially disposed at intervals, and the second limiting structure 233 is configured as at least two stops circumferentially disposed along the outer circumferential surface of the oil seal seat 23 at intervals.
In the above embodiment, the oil seal seat 23 and the mounting hole 11 are in clearance fit or transition fit, that is, the outer wall of the oil seal seat 23 and the mounting hole 11 are not in interference fit, so that the oil seal seat 23 and the mounting hole 11 can be conveniently disassembled and assembled. Due to the sealing effect of the motor oil seal 21 and the half shaft oil seal 22, when the coaxial electric drive bridge works, oil is sealed between the motor oil seal 21 and the half shaft oil seal 22, and the oil cannot enter the mounting hole 11, so that the oil seal seat 23 and the mounting hole 11 are in clearance fit or transition fit without considering the oil leakage condition.
Further, in order to avoid the occurrence of oil leakage, a sealing member may be disposed between the outer wall of the oil seal seat 23 and the inner wall of the mounting hole 11, and the specific setting of the sealing member is not limited, for example, a sealing groove may be disposed on the outer circumferential surface of the oil seal seat 23 and/or the inner wall of the mounting hole 11, and the sealing member may be a sealing ring disposed on the sealing groove.
In addition, in order to further improve the convenience of disassembling and assembling the oil seal seat 23, in this embodiment, a screw hole is further formed in the outer side wall (i.e., a side wall facing the outside of the mounting hole 11) of the oil seal seat 23, when the oil seal assembly 2 is disassembled, the oil seal assembly 2 can be pulled out from the outside through the process bolt by matching the process bolt with the screw hole, so that the disassembly and the operation are convenient.
In the above embodiment, the oil seal seat 23 is further provided with a weight reduction structure 234 to achieve the goal of light weight, which is convenient for disassembly and assembly operations. Specifically, the weight-reducing structure 234 is a weight-reducing groove provided on an outer side wall or an inner side wall of the oil seal seat 23, and the weight-reducing groove may be an annular weight-reducing groove provided along a circumferential direction of the oil seal seat 23 as shown in fig. 4, or may be a plurality of weight-reducing grooves provided at intervals on the inner side wall and/or the outer side wall of the oil seal seat 23, or the weight-reducing structure 234 may be a weight-reducing hole, and the like, which is not limited herein.
In the above embodiment, the material of the oil seal seat 23 may be cast iron, steel, aluminum alloy or non-metal material, as long as the hardness of the oil seal seat 23 is ensured to enable the oil seal seat to be fixed with the motor oil seal 21 and the half-shaft oil seal 22, the material is widely available, and the cost is low.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A motor assembly of a coaxial electric drive bridge is characterized by comprising a driving motor (4) and an oil seal component (2);
the driving motor (4) comprises an end cover (1) and a rotary transformer (3), a mounting hole (11) is formed in the outer wall of the end cover (1), a stator (31) of the rotary transformer (3) is fixed to the hole bottom of the mounting hole (11), and the outer diameter of the mounting hole (11) is not smaller than the diameter of the hole bottom;
the oil seal assembly (2) comprises a motor oil seal (21) and a half shaft oil seal (22) which are arranged in the mounting hole (11).
2. The coaxial electric drive bridge motor assembly according to claim 1, wherein the oil seal assembly (2) further comprises an oil seal seat (23), the oil seal seat (23) comprises a first mounting groove (231) and a second mounting groove (232) which are communicated with each other and coaxially arranged, the first mounting groove (231) is formed in the inner side wall of the oil seal seat (23) and used for mounting the motor oil seal (21), and the second mounting groove (232) is formed in the outer side wall of the oil seal seat (23) and used for mounting the half shaft oil seal (22).
3. The coaxial electric drive bridge motor assembly according to claim 2, wherein the outer end surface of the mounting hole (11) is further provided with a first limiting structure (12), and the outer circular surface of the oil seal seat (23) is further provided with a second limiting structure (233) matched with the first limiting structure (12).
4. The electric machine assembly of the coaxial electric drive bridge according to claim 2, characterized in that the oil seal seat (23) and the mounting hole (11) are in clearance fit or transition fit.
5. The coaxial electric drive bridge motor assembly according to claim 4, wherein a sealing ring is further arranged between the outer circular surface of the oil seal seat (23) and the inner wall of the mounting hole (11).
6. The coaxial electric drive bridge motor assembly according to any one of claims 2 to 5, wherein the outer end surface of the oil seal seat (23) is further provided with a screw hole.
7. The electric machine assembly of the coaxial electric drive bridge according to any of claims 2 to 5, characterized in that the oil seal seat (23) is further provided with a weight reduction structure (234).
8. The electric machine assembly of the coaxial electric drive bridge according to any of claims 2 to 5, characterized in that the oil seal seat (23) is made of cast iron, steel, aluminum alloy or non-metal.
9. The coaxial electric drive bridge motor assembly according to claim 1, wherein the motor oil seal (21) and the half shaft oil seal (22) are in interference fit with the inner wall of the mounting hole (11), respectively.
10. An in-line electric drive bridge, comprising an electric machine assembly according to any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021156237.6U CN212543588U (en) | 2020-06-19 | 2020-06-19 | Coaxial type electrically-driven bridge and motor assembly of coaxial type electrically-driven bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021156237.6U CN212543588U (en) | 2020-06-19 | 2020-06-19 | Coaxial type electrically-driven bridge and motor assembly of coaxial type electrically-driven bridge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212543588U true CN212543588U (en) | 2021-02-12 |
Family
ID=74549100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021156237.6U Active CN212543588U (en) | 2020-06-19 | 2020-06-19 | Coaxial type electrically-driven bridge and motor assembly of coaxial type electrically-driven bridge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212543588U (en) |
-
2020
- 2020-06-19 CN CN202021156237.6U patent/CN212543588U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0123900Y2 (en) | ||
| US9444293B2 (en) | Rotary electric machine | |
| CN212543588U (en) | Coaxial type electrically-driven bridge and motor assembly of coaxial type electrically-driven bridge | |
| US9115800B2 (en) | Planetary carrier | |
| JP2021048762A (en) | Engine and electric motor assembly | |
| CN113824271A (en) | Coaxial type electrically-driven bridge and motor assembly of coaxial type electrically-driven bridge | |
| CN102029543A (en) | Serial and parallel swing mechanism of AC (alternating current) permanent magnet synchronous exterior rotor type torque motor | |
| CN108025409A (en) | Driving device for rotating beam | |
| CN216025945U (en) | Steel roller mechanism | |
| US6969936B2 (en) | Rotational position detecting sensor-equipped motor and biaxial motor | |
| CN201841118U (en) | Sealing device for powder concentrator | |
| CN208458908U (en) | A kind of mechanical seal rubbing surface torque measurement tooling | |
| CN210327181U (en) | Double-rotor motor rotating shaft structure | |
| CN104852524A (en) | Integrated hub bearing and automobile | |
| CN202918102U (en) | Simplified motor structure | |
| CN113890258A (en) | Motor assembly of electric drive axle and electric drive axle | |
| CN205304469U (en) | Torque motors suitable for arbitrary high acceleration value acceleration environment of direction | |
| CN201863039U (en) | Alternating current permanent-magnet synchronous outer rotor type torque motor parallel swinging mechanism | |
| CN110829773A (en) | Motor structure with rotary transformer and rotary transformer debugging method thereof | |
| CN215498481U (en) | Split type rotor support structure motor with rotary transformer connecting shaft | |
| JP2501874Y2 (en) | Spindle device | |
| CN218532832U (en) | Electric spindle structure of machine tool | |
| CN105149923B (en) | A kind of device of dismounting screw thread class part | |
| CN210796884U (en) | Mounting structure of no shell motor on industrial sewing machine | |
| CN216414049U (en) | Be applied to horizontal motor bearing bracket location structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |