CN217307384U

CN217307384U - Axial positioning structure for motor rotor shaft

Info

Publication number: CN217307384U
Application number: CN202123371053.9U
Authority: CN
Inventors: 张友法
Original assignee: Funing Zhongzheng Machinery Manufacturing Co ltd
Current assignee: Funing Zhongzheng Machinery Manufacturing Co ltd
Priority date: 2021-12-27
Filing date: 2021-12-27
Publication date: 2022-08-26
Anticipated expiration: 2031-12-27

Abstract

The utility model relates to the field of motors, in particular to an axial positioning structure for a motor rotor shaft, which comprises a motor shell; both ends of the motor shell can be detachably connected with side covers, mounting holes are formed in both the side covers, and bearings are arranged in the mounting holes in both sides; a rotor iron core is arranged in the motor shell, a rotating shaft is arranged on the rotor iron core, and two ends of the rotating shaft are respectively connected with the bearings on the two sides; two fixing rings are welded on the rotating shaft, and the two fixing rings are both positioned on the inner side of the motor shell; be provided with positioner on the motor casing, positioner includes that two sets of symmetries are provided with spacing subassembly, and each group's spacing subassembly all includes the holding ring and rotates along annular array and install a plurality of balls on the holding ring, all is provided with on the solid fixed ring of both sides and supplies the rolling ball groove of ball, is provided with the gag lever post between holding ring and the side cap. The utility model discloses simple structure, simple to operate, and the location of countershaft is effectual.

Description

Axial positioning structure for motor rotor shaft

Technical Field

The utility model relates to the field of electric machines, especially, relate to an axial positioning structure for electric motor rotor axle.

Background

The motor is widely applied to social production as a power device for converting electric energy into mechanical energy. The permanent magnet motor mainly utilizes an electrified coil (namely a stator winding) to generate a rotating magnetic field and acts on a rotor (an armature core) to form magnetoelectric power rotating torque. The performance of the motor rotor directly influences the overall performance of the motor.

At present a lot of electric motor rotor and motor shaft are fixed as an organic whole, but at present because reasons such as rotor subassembly and load gravity itself or installation accuracy, motor operation in-process, the rotor takes place the friction with the terminal surface of bearing, cause the motor to shake the increase, the wearing and tearing aggravation, the very big noise of bringing moreover, simultaneously, the bearing outer lane with receive the influence of some factors such as motor vibrations, also can take place some activities, above-mentioned two factors can cause the rotor shaft to take place to remove in the axial, be unfavorable for the stable use of motor.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the technical problem who exists among the background art, the utility model provides an axial positioning structure for electric motor rotor axle.

The technical scheme of the utility model: an axial positioning structure for a motor rotor shaft comprises a motor shell; both ends of the motor shell can be detachably connected with side covers, mounting holes are formed in the two side covers, and bearings are arranged in the mounting holes in both sides; a rotor iron core is arranged in the motor shell, a rotating shaft is arranged on the rotor iron core, and two ends of the rotating shaft are respectively connected with the bearings on the two sides; two fixing rings are welded on the rotating shaft, and the two fixing rings are both positioned on the inner side of the motor shell; be provided with positioner on the motor casing, positioner includes that two sets of symmetries are provided with spacing subassembly, and each group's spacing subassembly all includes the holding ring and rotates along annular array and install a plurality of balls on the holding ring, all is provided with on the solid fixed ring of both sides and supplies the rolling ball groove of ball, is provided with the gag lever post between holding ring and the side cap.

Preferably, the upper end of the motor casing is provided with two oil dripping pipes, pipe covers are arranged on the oil dripping pipes, and the two oil dripping pipes are respectively positioned right above the balls on the two sides.

Preferably, the rotating shaft is in clearance fit with the inner ring of the bearing, bearing limiting assemblies are arranged on the two side covers and comprise sealing covers, inner limiting rings, outer limiting rings and threaded rings, the threaded rings are arranged on the outer sides of the side covers, the sealing covers are in threaded connection with the threaded rings, the outer limiting rings are arranged on the inner sides of the sealing covers, the inner limiting rings are arranged on the inner side surfaces of the side covers, and the outer limiting rings and the inner limiting rings are respectively abutted to the two sides of the bearing.

Preferably, a through hole for the rotating shaft to pass through is formed in the sealing cover on one side.

Preferably, the limiting rod is fixedly connected with the side cover, and a slot matched with the end of the limiting rod is formed in the side face of the positioning ring.

Preferably, the side cover and the motor shell are detachably connected through a fixing bolt.

Compared with the prior art, the above technical scheme of the utility model following profitable technological effect has: the two positioning devices are respectively used for limiting the fixing rings on the two sides, so that the rotating shaft can be prevented from generating displacement in the axial direction of the rotating shaft; when the positioning device is installed, the side covers on two sides are firstly disassembled, then the end parts of the limiting rods arranged on the side covers are inserted into the slots of the positioning rings, then the side covers are installed and reset, and when the side covers on two sides are fixedly installed, the balls on the positioning rings are abutted to the fixing rings, so that the rotating shaft can be prevented from displacing; to sum up the utility model discloses simple structure, simple to operate, and the location of countershaft is effectual.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural view of the middle fixing ring of the present invention.

Reference numerals: 1. a motor housing; 101. a side cover; 1011. mounting holes; 201. a rotor core; 202. a rotating shaft; 3. a fixing ring; 301. a ball groove; 4. a positioning ring; 5. a ball bearing; 6. a limiting rod; 7. fixing the bolt; 8. an oil dripping pipe; 81. a tube cover; 9. a bearing; 10. an outer limit ring; 11. a sealing cover; 111. perforating; 12. an inner limiting ring; 13. a threaded ring.

Detailed Description

Example one

As shown in fig. 1-2, the axial positioning structure for a motor rotor shaft according to the present invention includes a motor housing 1; both ends of the motor casing 1 can be detachably connected with side covers 101, the side covers 101 are detachably connected with the motor casing 1 through fixing bolts 7, mounting holes 1011 are formed in the two side covers 101, and bearings 9 are arranged in the mounting holes 1011 on both sides; a rotor core 201 is arranged inside the motor casing 1, a rotating shaft 202 is arranged on the rotor core 201, and two ends of the rotating shaft 202 are respectively connected with the bearings 9 on the two sides; two fixing rings 3 are welded on the rotating shaft 202, and the two fixing rings 3 are both positioned on the inner side of the motor casing 1; the motor casing 1 is provided with a positioning device, the positioning device comprises two groups of symmetrically arranged limiting assemblies, each group of limiting assemblies comprises a positioning ring 4 and a plurality of balls 5 which are rotatably arranged on the positioning ring 4 along an annular array, the fixing rings 3 on two sides are provided with ball grooves 301 for the balls 5 to roll, and a limiting rod 6 is arranged between the positioning ring 4 and the side cover 101; the limit rod 6 is fixedly connected with the side cover 101, and a slot matched with the end part of the limit rod 6 is arranged on the side surface of the positioning ring 4.

The rotating shaft 202 is in clearance fit with the inner ring of the bearing 9, bearing limiting assemblies are arranged on the two side covers 101 respectively, each bearing limiting assembly comprises a sealing cover 11, an inner limiting ring 12, an outer limiting ring 10 and a threaded ring 13, the threaded rings 13 are arranged on the outer sides of the side covers 101, the sealing covers 11 are in threaded connection with the threaded rings 13, the outer limiting rings 10 are arranged on the inner sides of the sealing covers 11, the inner limiting rings 12 are arranged on the inner side surfaces of the side covers 101, and the outer limiting rings 10 and the inner limiting rings 12 are respectively abutted to the two sides of the bearing 9; the arranged outer limiting ring 10 and the inner limiting ring 12 can limit and fix two sides of the bearing 9, and when the bearing 9 needs to be disassembled, the sealing cover 11 can be rotationally removed, so that the outer limiting ring 10 is separated from the side surface of the bearing 9, and the bearing 9 can be conveniently taken out from the inner side of the mounting hole 1011; the sealing cover 11 on one side is provided with a through hole 111 for the rotating shaft 202 to pass through.

The utility model discloses a theory of operation and application method: the two positioning devices are respectively used for limiting the fixing rings 3 on the two sides, so that the rotating shaft 202 can be prevented from generating displacement in the axial direction; when installing positioner, at first dismantle the side cap 101 of both sides, then with the tip of the gag lever post 6 that sets up on the side cap 101 insert in the slot of holding ring 4 can, install the side cap 101 again and reset after that, after the equal fixed mounting of the side cap 101 of both sides is good, ball 5 and solid fixed ring 3 looks butt on the holding ring 4 this moment to can prevent that pivot 202 from producing the displacement, the utility model discloses simple structure, simple to operate, and location effect is good.

Example two

As shown in fig. 1-2, the axial positioning structure for a motor rotor shaft according to the present invention includes a motor housing 1; both ends of the motor casing 1 can be detachably connected with side covers 101, the side covers 101 are detachably connected with the motor casing 1 through fixing bolts 7, mounting holes 1011 are formed in both the side covers 101, and bearings 9 are arranged in the mounting holes 1011 on both sides; a rotor core 201 is arranged inside the motor casing 1, a rotating shaft 202 is arranged on the rotor core 201, and two ends of the rotating shaft 202 are respectively connected with the bearings 9 on two sides; two fixing rings 3 are welded on the rotating shaft 202, and the two fixing rings 3 are both positioned on the inner side of the motor casing 1; the motor casing 1 is provided with a positioning device, the positioning device comprises two groups of symmetrically arranged limiting assemblies, each group of limiting assemblies comprises a positioning ring 4 and a plurality of balls 5 which are rotatably arranged on the positioning ring 4 along an annular array, the fixing rings 3 on two sides are provided with ball grooves 301 for the balls 5 to roll, and a limiting rod 6 is arranged between the positioning ring 4 and the side cover 101; the limit rod 6 is fixedly connected with the side cover 101, and a slot matched with the end part of the limit rod 6 is arranged on the side surface of the positioning ring 4.

Two oil drip pipes 8 are arranged at the upper end of the motor shell 1, pipe covers 81 are arranged on the oil drip pipes 8, and the two oil drip pipes 8 are respectively positioned right above the balls 5 at the two sides; lubricating oil is dropped into the oil dropping pipe 8, so that the ball 5 can be lubricated, and abrasion between the ball 5 and the fixing ring 3 is reduced.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited thereto, and various changes can be made without departing from the gist of the present invention within the scope of knowledge possessed by those skilled in the art.

Claims

1. An axial positioning structure for a motor rotor shaft, characterized by comprising a motor housing (1); both ends of the motor shell (1) can be detachably connected with side covers (101), mounting holes (1011) are formed in the two side covers (101), and bearings (9) are arranged in the mounting holes (1011) on both sides; a rotor core (201) is arranged in the motor shell (1), a rotating shaft (202) is arranged on the rotor core (201), and two ends of the rotating shaft (202) are respectively connected with the bearings (9) on the two sides; two fixing rings (3) are welded on the rotating shaft (202), and the two fixing rings (3) are both positioned on the inner side of the motor shell (1); be provided with positioner on motor casing (1), positioner includes that two sets of symmetries are provided with spacing subassembly, and every a set of spacing subassembly all includes holding ring (4) and rotates along annular array and install a plurality of balls (5) on holding ring (4), all is provided with on the solid fixed ring (3) of both sides and supplies ball (5) rolling ball groove (301), is provided with gag lever post (6) between holding ring (4) and side cap (101).

2. The axial positioning structure for the motor rotor shaft according to claim 1, characterized in that two oil drip pipes (8) are arranged at the upper end of the motor casing (1), a pipe cover (81) is arranged on each oil drip pipe (8), and the two oil drip pipes (8) are respectively positioned right above the balls (5) at the two sides.

3. The axial positioning structure for the rotor shaft of the motor is characterized in that the rotating shaft (202) is in clearance fit with the inner ring of the bearing (9), bearing limiting assemblies are arranged on the two side covers (101), each bearing limiting assembly comprises a sealing cover (11), an inner limiting ring (12), an outer limiting ring (10) and a threaded ring (13), each threaded ring (13) is arranged on the outer side of each side cover (101), each sealing cover (11) is in threaded connection with each threaded ring (13), each outer limiting ring (10) is arranged on the inner side of each sealing cover (11), each inner limiting ring (12) is arranged on the inner side face of each side cover (101), and each outer limiting ring (10) and each inner limiting ring (12) are respectively abutted against two sides of the bearing (9).

4. An axial positioning structure for a rotor shaft of an electric machine according to claim 3, characterized in that the sealing cover (11) on one side is provided with a through hole (111) for the rotation shaft (202) to pass through.

5. The axial positioning structure for the motor rotor shaft according to claim 1, characterized in that the limit rod (6) is fixedly connected with the side cover (101), and the side surface of the positioning ring (4) is provided with a slot matched with the end of the limit rod (6).

6. An axial positioning structure for a motor rotor shaft according to claim 1, characterized in that the detachable connection between the side cover (101) and the motor casing (1) is realized by means of fixing bolts (7).