CN102261552B

CN102261552B - Lubricating device for traction motor bearing

Info

Publication number: CN102261552B
Application number: CN 201110107968
Authority: CN
Inventors: 金纯�; 李艳红
Original assignee: 北京科技大学
Priority date: 2011-04-28
Filing date: 2011-04-28
Publication date: 2013-08-28
Also published as: CN102261552A

Abstract

The invention is a lubricating device for a traction motor bearing, belonging to the field of bearing lubrication. The lubricating device is provided with oil filling holes 27, 35 and 30 and oil drainage holes 31, 37, 38 and 39, all of which are formed on the rotating shaft 1 and the shaft core 24 of a motor, respectively, wherein the oil filling holes 27 and 35 are communicated with oil filling cavities 32 and 34 on one side of a front bearing, respectively; and oil drainage cavities 33 and 36 on the other side of the front bearing are communicated with annular oil return cavities through the oil drainage holes 31, 37, 38 and 39. The devices realizes respectively independent oil filling and oil drainage of the front and rear bearings; while filling oil, the oil is only needed to be filled into an oil cup 18 on the oil filling holes; ageing oil automatically flows into the oil drainage holes to enter the oil return cavities; and once a spring retainer ring between the shaft core and the rotating shaft is detached, the shaft core can be withdrawn and the waste oil can be discarded. The lubricating device of the invention solves the problem of difficult operation of lubricating the traction motor bearing, and is capable of realizing grease lubrication of the front and rear bearings simultaneously to prolong the service lives of the bearings.

Description

A kind of lubricating fitting of traction electric machine bearing

Technical field

Patent of the present invention relates to the lubricating fitting of bearing, particularly the lubricating fitting of traction electric machine bearing.

Background technique

Traction electric machine is the low-speed big motor, and bearing is the important component part of motor, plays a supportive role in motor, is bearing great alternation radially, so the life-span of bearing is an important parameter of electrical machinery life.Motor will be given the bearing grease up after operation a period of time, reduces friction, prolongs bearing life.For the mine vehicle, working environment is particularly abominable, and the volume of traction electric machine is big, is not easy dismounting.In the prior art, can be by offering oil hole and oil drainage hole at electric motor end cap and bearing (ball) cover to bearing lubrication, but lubricated at step bearing before single or rear end bearing just can not be realized front and back bearings lubricated simultaneously; The traction electric machine that uses self oiling bearing is also arranged, but this bearing is short working life, with wearing and tearing aggravation afterwards after a while, replacing in time, this method is not only operated relatively difficulty but also less economical.The traction electric machine that structural assembly is arranged for the front end and back end, the above-mentioned method of offering oil duct at end cap can not be implemented, mostly adopt the disposable lubricating grease of packing into for this motor at present, then want dismounting disintegration motor front-end architecture assembly, electric motor end cap, bearing (ball) cover, motor integral body etc. if will add lubricating grease, the dismounting difficulty is big, but if bearing is not added lubricating grease, bearing life shortens, owing to adopt the hot pressing assembling between bearing and the machine shaft when mounted, the maintain and replace bearing bothers very much, brings a lot of inconvenience and economic loss to the user.

Summary of the invention

Patent of the present invention is for addressing the above problem proposition, and its purpose is to design a kind of under the situation of the lubricating fitting that need not dismounting, can be simultaneously for the motor front and back bearings provide lubricating grease, thus prolong bearing life.

Technological scheme of the present invention is as follows:

A kind of lubricating fitting of traction electric machine bearing comprises: machine shaft (1), rotating shaft axle core (24), motor fore bearing (20), motor rear bearing (23); It is characterized in that: be processed into the hollow-core construction of ladder in the described machine shaft (1), the axle core (24) of hierarchic structure is put into rotating shaft (1), itself and machine shaft (1) surround annular oil return cavity (29), (41); The both sides of described forward and backward bearing are respectively arranged with oiling chamber (32), (34) and oil-discharging cavity (33), (36); Fore bearing oil hole (27) and rear bearing oil hole (35) are set on the described machine shaft (1), on the axle core (24) oil hole (30) are set, they are connected with oiling chamber (32), (34) of fore bearing (20), rear bearing (23) one sides; Described rotating shaft (1) is provided with fore bearing oil drainage hole (31) and rear bearing oil drainage hole (37), and axle core (24) is provided with oil drainage hole (38), (39); The oil-discharging cavity of described fore bearing and rear bearing opposite side (33), (36) are connected with annular oil back chamber (29), (41) by oil drainage hole (31), (37), (38), (39).

In the technique scheme, preferred, described axle core (24) is fixed in the rotating shaft (1) by circlip (19), limits its axial float.

In the technique scheme, preferred, the hydraulic fluid port both sides that described axle core (24) is communicated with rotating shaft (1) all arrange O RunddichtringO (28), (40), in order to prevent the leakage of grease in different holes and the chamber.

In the technique scheme, preferred, described device also comprises fore bearing end cap (13) and rear bearing cover (4), has all installed the felt collar oil sealing in described fore bearing end cap (13) and the rear bearing cover (4), prevents that seal grease from flowing out.

In the technique scheme, preferred, described axle core (24) all is provided with circular groove with the oil outlet place that rotating shaft (1) contacts, even the through hole in axle core (24) and the rotating shaft (1) exists differential seat angle can guarantee that also grease flows in the rotating shaft through hole.

In the technique scheme, preferred, the oil hole (30) on the described axle core (24) is provided with the obstruction (26) of the oil drainage hole (39) on lubricating cup (18) and the seal shaft core (24).

Patent oil channel structures of the present invention is reasonable in design, and greasy property is reliable, can effectively prevent the grease leakage, guarantee grease cleaning, and easy to operate, can effectively prolong the motor bearings life-span, reduce manufacturer production maintenance expenses and workman's manipulation strength, improved manufacturing efficiency.

Description of drawings

Fig. 1 is the sectional view of a traction electric machine, this motor have one according to the present invention the bearing-lubricating device of patent.

Fig. 2 is A portion zoomed-in view among Fig. 1

Fig. 3 is B portion zoomed-in view among Fig. 1

Wherein

1 rotating shaft

2 rear bearing end caps

3 bolts

4 back end cover for motor

5 hexagon socket cap head screws

6 flat keys

7 rotors

8 stators

9 motor casings

10 hex head bolts

11 motor front covers

12 wire outlet holes

13 bolts

14 Hall outlet seats

15 Hall magnet steel seats

16 fore bearing end caps

17 flat keys

18 lubricating cups

19 circlips

20 fore bearings

21 fore bearing back-up rings

22 rear bearing back-up rings

23 rear bearings

24 cores

25 O RunddichtringOs

26 stop up

Fore bearing oil hole in 27 rotating shafts

28 O RunddichtringOs

29 annular oil back chambers

Oil hole on 30 cores

Fore bearing oil drainage hole in 31 rotating shafts

32 fore bearing oiling chambeies

33 fore bearing oil-discharging cavities

34 rear bearing oiling chambeies

Rear bearing oil hole in 35 rotating shafts

36 rear bearing oil-discharging cavities

Rear bearing oil drainage hole in 37 rotating shafts

Oil drainage hole on 38 cores

Oil drainage hole on 39 cores

40 O RunddichtringOs

41 annular oil back chambers

Embodiment

Below in conjunction with drawings and Examples patent of the present invention is described in further detail.

Shown in Fig. 1-3, the lubricating fitting of the described traction electric machine bearing of patent of the present invention, its concrete structure is:

Machine shaft 1 is fixedlyed connected by flat key 6 with rotor 7, forward and backward bearing (ball) cover 16,2 fixedlys connected 11,4 by bolt 3,13 with the forward and backward end cap of motor with forward and backward bearing block 21,22, motor front cover 11 is fixedlyed connected by bolt 10 with motor casing 9, and back end cover for motor 4 is fixed together by hexagon socket cap head screw 5 and motor casing 9.Hall magnet steel seat 15 is fixed together by flat key 17 and rotating shaft, and the line on the Hall outlet seat 14 lays out by wire outlet hole 12.Motor casing 9 machine shafts 1 are supported in a pair of bearing 20,23 that is arranged in motor front cover 11 and the rear end cover 4, rotating shaft 1 front end stretches out front cover 11, by the brake disc engagement of external splines and break, rear end cover 4 is stretched out in the rear end, by the semiaxis engagement of internal spline and retarder.Be processed into the hollow-core construction of ladder in the machine shaft 1, the axle core 24 of hierarchic structure is put into rotating shaft 1, itself and machine shaft 1 surround annular oil return cavity 29,41; The both sides of described forward and backward bearing are respectively arranged with oiling chamber 32,34 and oil-discharging cavity 33,36; Fore bearing oil hole 27 and rear bearing oil hole 35 are set on the described machine shaft 1, on the axle core 24 oil hole 30 are set, they are connected with the oiling chamber 32,34 of fore bearing 20, rear bearing 23 1 sides; Described rotating shaft 1 is provided with fore bearing oil drainage hole 31 and rear bearing oil drainage hole 37, and axle core 24 is provided with oil drainage hole 38,39; The oil-discharging cavity 33 of described fore bearing and rear bearing opposite side, 36 is connected with annular oil back chamber 29,41 by oil drainage hole 31,37,38,39.

Axle core 24 usefulness circlips 19 are fixed in the rotating shaft 1, limit its axial float, and the hydraulic fluid port both sides that a core 24 is communicated with rotating shaft 1 all arrange O RunddichtringO 28,40, in order to prevent the leakage of grease in different holes and the chamber.Axle core 24 is processed into circular groove with the oil port that rotating shaft 1 contacts, even the through hole in 24 rotating shafts 1 of axle core exists differential seat angle can guarantee that also grease flows in the rotating shaft through hole.

Oil hole 30 on the axle core 24 is provided with lubricating cup 18.In actual use, as long as fat is injected lubricating cup 18, grease flows into the front and back bearings track automatically along oil hole.Bearing is after operation a period of time, and the waste oil oil drainage hole on rotating shaft 1 and axle core 24 automatically flows into the oil back chamber 30,41, only needs the compartment time to take off check ring 25, and axle core 24 from 1 li extraction of rotating shaft, can be outwelled waste oil.

Claims

1. the lubricating fitting of a traction electric machine bearing comprises: machine shaft (1), rotating shaft axle core (24), motor fore bearing (20), motor rear bearing (23); It is characterized in that: be processed into the hollow-core construction of ladder in the described machine shaft (1), the axle core (24) of hierarchic structure is put into rotating shaft (1), itself and machine shaft (1) surround annular oil return cavity (29,41); Described fore bearing both sides are respectively arranged with the first oiling chamber (32) and first oil-discharging cavity (33); The both sides of rear bearing are respectively arranged with the second oiling chamber (34) and second oil-discharging cavity (36); Fore bearing oil hole (27) and rear bearing oil hole (35) are set on the described machine shaft (1), on the axle core (24) oil hole (30) is set, the oil hole (30) on the axle core is connected with the first oiling chamber (32) of fore bearing (20) one sides by fore bearing oil hole (27); Oil hole (30) on the axle core is connected with the second oiling chamber (34) of rear bearing (23) one sides by rear bearing oil hole (35); Described rotating shaft (1) is provided with fore bearing oil drainage hole (31) and rear bearing oil drainage hole (37), and axle core (24) is provided with oil drainage hole (38), (39); First oil-discharging cavity (33) of described fore bearing opposite side is connected with annular oil back chamber (29), (41) by fore bearing oil drainage hole (31); Second oil-discharging cavity (36) of rear bearing opposite side is connected with annular oil back chamber (29), (41) by oil drainage hole (38), (39) on rear bearing oil drainage hole (37) and the axle core.

2. the lubricating fitting of traction electric machine bearing according to claim 1 is characterized in that, described axle core (24) is fixed in the rotating shaft (1) by circlip (19), limits its axial float.

3. the lubricating fitting of traction electric machine bearing according to claim 1 is characterized in that, the oilhole both sides that described axle core (24) is communicated with rotating shaft (1) all arrange O RunddichtringO (28,40), in order to prevent the leakage of grease in different holes and the chamber.

4. the lubricating fitting of traction electric machine bearing according to claim 1, it is characterized in that, described device also comprises fore bearing end cap (13) and rear bearing cover (4), has all installed the felt collar oil sealing in described fore bearing end cap (13) and the rear bearing cover (4), prevents that seal grease from flowing out.

5. the lubricating fitting of traction electric machine bearing according to claim 1 is characterized in that, the oil hole (30) on the described axle core (24) is provided with lubricating cup (18), and described device also has the obstruction (26) of the oil drainage hole (39) on the seal shaft core (24).