CN2364268Y

CN2364268Y - Dust-proof bearing

Info

Publication number: CN2364268Y
Application number: CN 98218666
Authority: CN
Inventors: 那书民
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-08-27
Filing date: 1998-08-27
Publication date: 2000-02-16
Anticipated expiration: 2008-08-27

Abstract

The utility model discloses a dust-proof bearing which comprises a bearing. The utility model is characterized in that the outer side of the bearing is provided with a bearing protecting cover which is fixed to a machine frame and is provided with an inner hollow cavity and an air inlet, the air inlet is provided with an air inlet pipe which is communicated with clean air and an airflow gap is arranged between the bearing protecting cover and a main shaft. The outer side of the bearing protecting cover is provided with an outer bearing cover which is fixed to the main shaft and is provided with an outer hollow cavity, an airflow gap is arranged between the outer bearing cover and the bearing protecting cover and the inner part of the outer hollow cavity is provided with a wind wheel. The utility model has the advantages of simple structure, convenient installation and operation, good dust-proof effect, low cost, etc., and can be used in the severe working environment with more dust.

Description

A kind of shield bearing

The utility model relates to a kind of engineering element, specifically a kind of shield bearing.

The bearing of under the bigger environment of dust, working, as the bearing on the air flow powder sieving machine since dust pierce bearing usually cause bearing to grind can't proper functioning.The scheme of method of using always in the prior art that adds seal ring and design mazy type bearing cap, or too simple, or structure is too complicated, and can not prevent effectively that all the bearing that dust causes from grinding problem.

The purpose of this utility model is to design a kind of simple in structure, easy to install, good dustproof effect, shield bearing that cost is low.

Design proposal of the present utility model is as follows, specifically comprise bearing, it is characterized in that said bearing outside is provided with the bearing protecting cover that has inner cavity that is fixed on the frame, have inlet hole on the bearing protecting cover, inlet hole is provided with the suction tude that is connected with clean air, and an airflow clearance is arranged between bearing protecting cover and the main shaft.

Suction tude is sent into the malleation clean air during the utility model work, inner cavity between bearing and the bearing protecting cover keeps malleation always, clean air enters inner cavity from suction tude, overflow from the gap between bearing protecting cover and the main shaft, dust can't enter bearing, thereby has fundamentally solved the grinding loss problem of the more environment lower bearing of dust.As seen, the utlity model has simple in structure, easy to install, good dustproof effect, low cost and other advantages, can be in the bigger rugged environment of dust proper functioning, can be used for rotation supporting part as equipment such as sieving machines.

The utility model has following accompanying drawing:

Fig. 1 shield bearing structural representation

Below in conjunction with accompanying drawing the utility model is elaborated.

Fig. 1 is the utility model structural representation, and the inner ring drive fit of bearing 6 is installed on the main shaft 1, and its outer ring is fixedly mounted on the frame 7.The outside of bearing is provided with bearing protecting cover 4, and the bearing protecting cover can adopt the existing protecting cover of some bearing, also can be according to shape, size preparation protecting cover.Bearing protecting cover 4 is cylindrical protecting covers that cover on the bearing outside, and an inner cavity 12 is arranged between its caping and the bearing.Bearing protecting cover 4 is fixed on the frame, for example available screw 14 is fixed, it does not rotate with main shaft, and there is an airflow clearance 16 to be used for outside exhaust between the main shaft 1, the utility model has inlet hole 8 on the bearing protecting cover, inlet hole 8 is provided with suction tude 9, feeds clean air in the suction tude 9, clean air is 16 discharges from the gap between bearing protecting cover 4 and the main shaft 1, thereby have prevented that effectively dust from entering bearing and causing its grinding loss.In the inner cavity 12 with ambient air between pressure reduction different producing methods can be arranged, for example, feed the malleation clean air in the suction tude; And for example, can adopt the bearing protecting cover to produce the mode of sourceof negative pressure outward, when being used to sieve powder, the shell of sieving machine adds an outside air bells exhauster, and can make its inner bearing protecting cover is negative pressure with respect to the clean air suction tude of concora crush.The utility model has changed the design proposal of various in the prior art " passive protections ", adopted the design proposal of " making an initiative sally ", make powder can't enter gap 16, thereby can not enter in the bearing, fundamentally solved the bearing grinding problem that dust causes.When an end of bearing did not have transmission part, available end cap was with the end sealing of bearing, and the end that above-mentioned protecting cover etc. only are located at bearing gets final product; When all there is transmission part at the two ends of bearing, can above-mentioned structures such as protecting cover all be set in the both sides of bearing, so that bearing obtains reliable protection.

More reliable for the protection that makes bearing, can add a bearing end cover 2 again in the outside of bearing protecting cover 4, enclosing cover 2 is fixed on the main shaft 1, for example can be fastened on the main shaft 1 by screw 11, for being tightly connected, rotates with main shaft between enclosing cover 2 and the main shaft 1.Bearing end cover 2 has external cavity 13, and external cavity 13 is between bearing end cover 2 and bearing protecting cover 4.Bearing end cover 2 also can be designed to cylindrical, and an airflow clearance 17 is arranged between bearing end cover 2 and the bearing protecting cover 4, also is to be used for outside exhaust, and this scheme has increased the dust-tight reliability.Above-mentioned enclosing cover also can be located at the one or both sides of bearing as required, and the generation of air-flow also can have above-mentioned dual mode during its work, i.e. the sourceof negative pressure of the malleation clean air of suction tude or bearing end cover outside (in the shell as the sieve powder).

Except that above two kinds of air-flow operation powers, the utility model gives another kind of design proposal, is provided with a wind wheel 3 in the external cavity 13 of said bearing end cover 2, and wind wheel 3 is fixed on the main shaft 1, rotates with main shaft during work.Drive the surrounding atmosphere rotation when wind wheel rotates, because the centrifugal force of rotation, air will be by flowing out in the gap 17 between bearing end cover 2 and the bearing protecting cover 4.Present design can be located at the one or both sides of bearing as required.

In above each scheme, can be provided with pad 5 between bearing 6 and the main shaft 1 to prevent the lubricant oil drying of bearing, the effect of anti-dust is also arranged simultaneously.

Fig. 1 is a most preferred embodiment of the present utility model, and top and following respectively being provided with on 4, two bearing protecting covers of a bearing protecting cover of bearing 6 all has inlet hole 8, for example can open in its side, is equipped with clean air suction tude 9 on the inlet hole 8.Bearing protecting cover 4 can be fixed on the frame 7 by screw 14, does not rotate during work, and main shaft 1 passes from the hole at its top, and an exhaust clearance 16 is arranged between the two, and its inside is inner cavity 12.Be respectively equipped with a

bearing end cover

2,10 in upper and lower two bearing protecting cover 4 outsides, also can be called upper ball cover 2 and lower ball cover 10, the two all is fixed on the main shaft 1, for example can be fixing by screw 11, rotate with main shaft during work, between the two for being tightly connected.Upper and

lower bearing cap

2,10 inside are external cavity 13, between the two and the bearing protecting cover 4 exhaust clearance 17 are arranged all.Can be provided with wind wheel 3 in two external cavities 13; wind wheel 3 is fixed on the main shaft 1; rotate with main shaft during work; air is discharged from gap 17; by sending into the malleation clean air in the suction tude 9 or leaning on the sourceof negative pressure of bearing outside that clean air is sucked suction tude 9, make the powder in the working environment can't make it obtain reliable protection near bearing 6 simultaneously at all; thereby can be under the more abominable working environment of various dust, powder proper functioning, overcome the shortcoming of prior art effectively.

Claims

1 one kinds of shield bearings, comprise bearing (6), it is characterized in that said bearing outside is provided with the bearing protecting cover (4) that has inner cavity (12) that is fixed on the frame (7), have inlet hole (8) on the bearing protecting cover (4), inlet hole (8) is provided with the suction tude (9) that is connected with clean air, between bearing protecting cover (4) and the main shaft (1) airflow clearance (16) is arranged.

2 shield bearings according to claim 1, the outside that it is characterized in that said bearing protecting cover (4) is provided with the bearing end cover that has external cavity (13) (2) that is fixed on main shaft (1), between bearing end cover (2) and the bearing protecting cover (4) airflow clearance (17) is arranged.

3 shield bearings according to claim 2 is characterized in that being provided with the wind wheel (3) that is fixed on the main shaft (1) in the external cavity (13) of said bearing end cover (2).

4 according to claim 1 or 2 or 3 described shield bearings, it is characterized in that being provided with pad (5) between said bearing (6) and the main shaft (1).