CN210898672U

CN210898672U - Motor rotor assembly

Info

Publication number: CN210898672U
Application number: CN201922075495.5U
Authority: CN
Inventors: 秦鑫; 崔乃峰; 钟鸣
Original assignee: Zhengzhou Zhiqu Technology Co ltd
Current assignee: Zhengzhou Zhiqu Technology Co ltd
Priority date: 2019-11-27
Filing date: 2019-11-27
Publication date: 2020-06-30
Anticipated expiration: 2029-11-27

Abstract

The utility model discloses a motor rotor assembly, including pivot, deep groove ball bearing, separate magnetic baffle, rotor core, gear shaft, four-point angular contact bearing, screw and bearing clamp plate, the both ends of pivot are installed respectively in deep groove ball bearing, deep groove ball bearing installs respectively in front end housing and rear end cap, install rotor core in the pivot, the both ends installation of rotor core separates magnetic baffle; the front end cover is internally provided with a four-point angular contact bearing, a gear shaft in the four-point angular contact bearing is connected with the rotating shaft, and a bearing pressing plate is arranged on the outer side of the four-point angular contact bearing. The utility model discloses a change the connected mode of pivot and gear shaft, the position of bearing clamp plate, increase four point angular contact bearing, under the prerequisite of guaranteeing the size satisfaction requirement, improved the bearing capacity and the design life of the axial force of motor bearing, effectively reduced the after-sale maintenance cost.

Description

Motor rotor assembly

Technical Field

The utility model relates to an electric machine structure, concretely relates to electric motor rotor assembly.

Background

The rotor assembly is a rotating part in the motor, and the bearing belongs to a key part in the rotor assembly. As the commercial vehicle has higher requirements on the kilometer number and the service life of the motor, the service life of the bearing directly influences the after-sale maintenance cost of the motor.

The hub electric drive bridge or hub motor reducer assembly on the market at present mainly adopts a pair of bearings which are independently added to a high-speed shaft of the reducer and is connected with a motor shaft by a spline. But this scheme can increase whole volume, weight and cost, reduces whole car space.

The integrated electric drive bridge is researched and developed by the company at present, and the speed reducer adopts a special structure, so that the size and the weight are greatly reduced. However, the axial force of the high-speed shaft of the speed reducer is applied to the motor rotor assembly, so that the service life of a motor bearing is greatly reduced, and after review, the after-sale maintenance cost is considered to be too high and unacceptable.

Disclosure of Invention

In order to solve the problem, the utility model provides an electric motor rotor assembly, its life-span problem that can effectively solve motor bearing has also guaranteed the weight and the volume of complete machine at the within range that allows.

The utility model adopts the technical proposal that: a motor rotor assembly comprises a rotating shaft, a deep groove ball bearing, a magnetism isolating baffle, a rotor iron core, a gear shaft, a four-point angular contact bearing, a screw and a bearing pressing plate, wherein two ends of the rotating shaft are respectively installed in the deep groove ball bearing; the front end cover is internally provided with a four-point angular contact bearing, a gear shaft in the four-point angular contact bearing is connected with the rotating shaft, and a bearing pressing plate is arranged on the outer side of the four-point angular contact bearing.

Furthermore, a bearing pressing sleeve is arranged on a rotating shaft between the deep groove ball bearing and the four-point angular contact bearing, an oil seal is arranged on an outer ring of the bearing pressing sleeve, and an inner ring of the oil seal is in contact with the bearing pressing sleeve to form dynamic seal.

Furthermore, the deep groove ball bearing is lubricated by grease, the outer ring of the deep groove ball bearing is in transition fit with the front end cover and the rear end cover respectively, and wave springs are arranged between the deep groove ball bearing and the front end cover and between the deep groove ball bearing and the rear end cover.

Furthermore, the gear shaft and the rotating shaft are in transition fit, two flat keys are installed between the gear shaft and the rotating shaft, and the gear shaft and the rotating shaft are locked through the meshing of screws and threaded holes.

Further, the four-point angular contact bearing is oil-lubricated, the inner ring of the four-point angular contact bearing is respectively contacted with the shaft shoulder of the gear shaft and the shaft end of the rotating shaft, and the outer ring of the four-point angular contact bearing is respectively contacted with the front end cover and the bearing pressing plate.

The utility model discloses the beneficial effect who produces is: the utility model discloses a change the connected mode of pivot and gear shaft, the position of bearing clamp plate, increase four point angular contact bearing, under the prerequisite of guaranteeing the size satisfaction requirement, improved the bearing capacity and the design life of the axial force of motor bearing, effectively reduced the after-sale maintenance cost.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a sectional view of the joint of the rotary shaft and the gear shaft;

in the figure: the structure of the rotor comprises a 1-rotating shaft, a 2-deep groove ball bearing I, a 3-wave spring I, a 4-magnetic isolation baffle I, a 5-rotor iron core, a 6-flat key, a 7-magnetic isolation baffle II, an 8-deep groove ball bearing II, a 9-wave spring II, a 10-oil seal, an 11-four-point angular contact bearing, a 12-gear shaft, a 13-screw, a 14-bearing pressing sleeve, a 15-bearing pressing plate, a 16-front end cover, a 17-screw thread and a 18-rear end cover.

Detailed Description

The technical solutions of the embodiments of the present invention will be explained and explained below with reference to the accompanying drawings, but the following embodiments are only preferred embodiments of the present invention, and not all embodiments. The utility model discloses the embodiment that realizes with other different forms all belongs to the utility model discloses create the protection scope.

As shown in fig. 1 and 2, a motor rotor assembly comprises a rotating shaft 1 and a gear shaft 12, two ends of the rotating shaft 1 are respectively installed in a first deep groove ball bearing 2 and a second deep groove ball bearing 8, both bearings are lubricated by grease, the first deep groove ball bearing 2 is installed in a rear end cover 18, the second deep groove ball bearing 8 is installed in a front end cover 16, clearance fit is formed between outer rings of the first deep groove ball bearing 2 and the second deep groove ball bearing 8 and the rear end cover 18 and the front end cover 16, and inner rings of the first deep groove ball bearing 2 and the second deep groove ball bearing 8 are in interference fit with the rotating shaft. A rotor core 5 is installed on the rotating shaft 1, and a first magnetic isolation baffle 4 and a second magnetic isolation baffle 7 are installed at two ends of the rotor core 5 respectively. Adopt transition fit between pivot 1 and the gear shaft 12, install two parallel keys 6 between the two respectively with pivot 1 transition fit, with gear shaft 12 interference fit, require two interior keyways of pivot 1 and two outer keyway symmetry precision of gear shaft 12 high. A first wave spring 3 is arranged between the rear end cover 18 and the first deep groove ball bearing 2, and a second wave spring 9 is arranged between the front end cover 16 and the second deep groove ball bearing 8.

The four-point angular contact bearing 11 is installed in the front end cover 16, the four-point angular contact bearing 11 is oil-lubricated and is installed on the gear shaft 12, an outer ring of the four-point angular contact bearing 11 is in clearance fit with the front end cover 16, and an inner ring of the four-point angular contact bearing 11 is in interference fit with the gear shaft 12; the inner ring of the four-point angular contact bearing 11 is contacted with the shaft shoulder of the gear shaft 12 and the shaft end of the rotating shaft 1, the outer ring is contacted with the front end cover 16 and the bearing pressing plate 15 respectively, and the outer ring, the gear shaft 12, the rotating shaft 1 and the bearing pressing plate 15 are fixed at the relative position of the front end cover 16 together and are locked by the screw 13 finally. The front end of the screw 13 is provided with a left-handed schubach thread 17, which ensures that the positive rotation direction of the motor is opposite to the locking direction of the screw 13. A gap is reserved between the bearing pressure plate 15 and the front end cover 16, and the bearing pressure plate is fixed on the front end cover 16 through bolts. The bearing pressing sleeve 14 is sleeved on the rotating shaft 1 in a hot mode, the precision, hardness and roughness of the outer cylindrical surface of the bearing pressing sleeve are high, the oil seal 10 is installed on the front end cover 16, the outer ring of the oil seal is in interference fit with the front end cover 16, and the inner ring of the oil seal is in contact with the outer cylindrical surface of the bearing pressing sleeve 14 to form dynamic sealing.

Claims

1. An electric machine rotor assembly characterized in that: the four-point angular contact bearing comprises a rotating shaft, a deep groove ball bearing, a magnetism isolating baffle, a rotor iron core, a gear shaft, four-point angular contact bearings, screws and a bearing pressing plate, wherein two ends of the rotating shaft are respectively installed in the deep groove ball bearing, the deep groove ball bearing is respectively installed in a front end cover and a rear end cover, the rotating shaft is provided with the rotor iron core, and two ends of the rotor iron core are provided with the magnetism isolating baffle; the front end cover is internally provided with a four-point angular contact bearing, a gear shaft in the four-point angular contact bearing is connected with the rotating shaft, and a bearing pressing plate is arranged on the outer side of the four-point angular contact bearing.

2. An electric machine rotor assembly as claimed in claim 1, wherein: the bearing pressing sleeve is arranged on a rotating shaft between the deep groove ball bearing and the four-point angular contact bearing, the oil seal is arranged on an outer ring of the bearing pressing sleeve, and an inner ring of the oil seal is in contact with the bearing pressing sleeve to form dynamic seal.

3. An electric machine rotor assembly as claimed in claim 1, wherein: the deep groove ball bearing is lubricated by grease, the outer ring of the deep groove ball bearing is in transition fit with the front end cover and the rear end cover respectively, and wave springs are arranged between the deep groove ball bearing and the front end cover and between the deep groove ball bearing and the rear end cover.

4. An electric machine rotor assembly as claimed in claim 1, wherein: the gear shaft and the rotating shaft are in transition fit, two flat keys are arranged between the gear shaft and the rotating shaft, and the gear shaft and the rotating shaft are locked by meshing of a screw and a threaded hole.

5. An electric machine rotor assembly as claimed in claim 1, wherein: the four-point angular contact bearing is oil-lubricated, the inner ring of the four-point angular contact bearing is respectively contacted with the shaft shoulder of the gear shaft and the shaft end of the rotating shaft, and the outer ring of the four-point angular contact bearing is respectively contacted with the front end cover and the bearing pressing plate.