CN201728758U

CN201728758U - Pulley gear of multi-wire cutting machine

Info

Publication number: CN201728758U
Application number: CN2010202479215U
Authority: CN
Inventors: 徐建钢; 王明明; 徐芳华; 张建功
Original assignee: SHAOXING JINGGONG ELECTRONIC RESEARCH INSTITUTE Co Ltd
Current assignee: Zhejiang Jinggong Science and Technology Co Ltd
Priority date: 2010-07-06
Filing date: 2010-07-06
Publication date: 2011-02-02
Anticipated expiration: 2020-07-06

Abstract

The utility model relates to a pulley gear of a multi-wire cutting machine, which runs in a severe environment for a long time. The existing pulley gear is untight in sealing structure, mortar is easy to enter an inner cavity of a pulley, and then normal operation of the pulley is affected. The pulley gear of a multi-wire cutting machine comprises a pulley shaft, a pulley disc and a pulley installed on the outer side wall of the pulley disc, and is characterized in that a bearing seat is installed at the center of the pulley disc, a bearing is embedded in the bearing seat, one end of the pulley shaft matches with the bearing while the other end thereof is in sealing fit with an end cover also embedded in the bearing seat, a labyrinth sealing structure is arranged between the end cover and the bearing seat, the end cover is provided with a threaded hole communicated with an inner cavity of the bearing seat, and the threaded hole is connected with an air pipe connector. The pulley gear of a multi-wire cutting machine has fine sealing property, ensures the pulley to run smoothly even in severe environments including splashing mortar, high air humidity and the like for a long time, does not need to replace components of the pulley repeatedly, and lowers enterprise production cost.

Description

A kind of pulley gear of multi-line cutting machine

Technical field

The utility model relates to a kind of pulley structure, especially belongs to a kind of multi-line cutting machine pulley gear of working under adverse circumstances for a long time.

Background technology

Multi-thread cutting technique and traditional knife saw, grinding wheel, interior circle cutting is compared, and it is few to have a loss, the precision height, the efficient advantages of higher is the cutting technique that adopts hard material such as semiconductor the most widely at present.Multi-line cutting machine its inner cutting chamber when work exists mortar to splash, a series of problems such as humidity is higher in the air, for the pulley assembly that in cutting, plays guide effect, how to guarantee that it keeps sealing for a long time is vital under abominable working environment.Because, tend to make that the working life of pulley assembly reduces greatly in case sealing does not pass a test, increased the operation cost of a whole set of cutting machine, also bring imponderable influence to marketing to wait the future of product.Existing pulley gear hermetically-sealed construction is tight inadequately, mortar enters the inner chamber of pulley easily, the running of the whole pulley in long-term use back is smooth and easy inadequately, causes the precision of process and assemble formation originally to be effectively guaranteed, and also can produce yoke to the cut quality that promotes hard materials such as semiconductor.For the pulley that the cut quality that reaches expection must more renew, can increase the production cost of enterprise so undoubtedly.

The utility model content

In order to overcome the defective that exists in the prior art, the utility model aims to provide a kind of pulley gear of multi-line cutting machine, can effectively fall the sealability of lifting tackle, reduces the mortar that enters the pulley inner chamber, guarantees product quality, reduces enterprise's production cost.

For achieving the above object, the utility model has been taked following technical scheme: a kind of pulley gear of multi-line cutting machine, comprise pulley spindle, pulley disc and be installed in pulley on the pulley disc lateral wall, a bearing block is installed at the center that it is characterized in that described pulley disc, setting-in bearing in the bearing block, described pulley spindle one end cooperates with bearing, and the other end cooperates with an end cap seal, described end cap also is inlaid in the bearing block, adopts labyrinth seal structure between end cap and the bearing block; Have the screwed hole that communicates with the bearing block inner chamber on the described end cap, described screwed hole is connected with a gas-tpe fitting.

Adopted contactless labyrinth seal (being the sealing of comb-tooth-type) between bearing block and the end cap, formed the passage that throttle clearance and expansion cavity are formed between the two, mortar produces throttle effect when passing through tortuous labyrinth channel, through energy loss repeatedly, mortar is difficult to leak into the inner chamber of pulley, reaches the purpose of sealing; During use, the external source of the gas of gas-tpe fitting makes the pulley inner chamber form hermetic seal, further enhanced leaktightness.

Form an annular recess on the lateral wall of described end cap, be provided with the metallic packing ring that seals between end cap lateral wall and the bearing block in the described annular recess, promote the sealing between end cap and the bearing block.

The axle body of described pulley spindle forms a circle inner groovy, installs on the inner groovy to be used for the O type circle that seals between pulley spindle lateral wall and the end cap, can prevent that mortar from flowing into from the gap between pulley spindle and end cap.

The elastic spring of a pair of end cap axial location of setting-in on the described pulley spindle, the outer end of described pulley spindle connects a nut.Elastic spring can position the pulley spindle outer end, prevents that it from taking place axially or move radially, and nut is used for the utility model and pulley mount pad are assembled.

The beneficial effects of the utility model are: the bearing block of pulley inside and end cap have adopted contactless labyrinth seal, and mortar produces throttle effect when passing through tortuous labyrinth channel, and mortar is difficult to leak into the inner chamber of pulley.Behind the external source of the gas of the gas-tpe fitting of installing on the end cap, make the inner formation of pulley hermetic seal, further promoted the sealing effectiveness of pulley.Guarantee that pulley splashes at mortar, still can work smoothly for a long time under the adverse circumstances such as humidity is higher in the air, reach the precision that the expection process and assemble needs, guarantee product quality, need not frequently change pulley part simultaneously, reduced enterprise's production cost.

Description of drawings

Fig. 1 is a STRUCTURE DECOMPOSITION schematic diagram of the present utility model;

Fig. 2 is the cutaway view of the utility model one side;

Fig. 3 is a perspective view of the present utility model;

Among the figure: 1. pulley spindle 2. bearing blocks 3. bearings 4. end caps 5. pulley discs 6. truckle 7.O type circles 8. metallic packing rings 9. elastic springs 10. gas-tpe fittings 11. nuts.

The specific embodiment

As Fig. 1, Fig. 2 and multi-line cutting machine pulley gear shown in Figure 3, mainly constitute by pulley spindle 1, pulley disc 5, pulley 6, pulley 6 is installed on the lateral wall of pulley disc 5.The affixed bearing block 2 of bolt is passed through at the center of pulley disc 5, setting-in bearings 3 in the bearing block 2, and an end of pulley spindle 1 cooperates with bearing 3, and the centre bore that an end cap 4 is passed in the other end cooperates with elastic spring 9 and nut 11.Elastic spring 9 can carry out axial location to end cap 4, end cap 4 also is inlaid in the bearing block 2, form annular recess on the lateral wall of end cap 4, form labyrinth seal structure on the inwall of this annular recess and bearing block 2, be provided with the metallic packing ring 8 that seals between end cap 4 lateral walls and the bearing block 2 in this annular recess.The axle body of pulley spindle 1 forms a circle inner groovy, and the O type circle 7 that is used for sealing between pulley spindle 1 lateral wall and the end cap 4 is installed on the inner groovy.The upper surface of end cap 4 has a through hole that communicates with bearing block 2 inner chambers, and this through hole and a gas-tpe fitting 10 join.

Pulley spindle 1 and bearing 3 should be assembled earlier during assembling, in the bearing block 2 of again both together being packed into, and detect its circular runout.After satisfying precision O type circle 7, metallic packing ring 8 and end cap 4 are successively packed into, elastic spring 9 and nut 11 are installed again, and detect pulley spindle 1 and rotate whether flexibly.Then bearing block 2 and pulley disc 5 and pulley 6 are assembled the gas-tpe fitting 10 of screwing at last.Nut 11 fits together the transition that is used as between the line directive wheel with a utility model and a pulley mount pad, plays the effect of regulating with break-in.

Claims

1. the pulley gear of a multi-line cutting machine, comprise pulley spindle (1), pulley disc (5) and be installed in pulley (6) on pulley disc (5) lateral wall, a bearing block (2) is installed at the center that it is characterized in that described pulley disc (5), the interior setting-in bearing of bearing block (2) (3), described pulley spindle (1) one end cooperates with bearing (3), a other end and an end cap (4) are sealed and matched, described end cap (4) also is inlaid in the bearing block (2), adopts labyrinth seal structure between end cap (4) and the bearing block (2); Have the screwed hole that communicates with bearing block (2) inner chamber on the described end cap (4), described screwed hole is connected with a gas-tpe fitting (10).

2. the pulley gear of multi-line cutting machine according to claim 1, it is characterized in that forming an annular recess on the lateral wall of described end cap (4), be provided with the metallic packing ring (8) that seals between end cap (4) lateral wall and the bearing block (2) in the described annular recess.

3. the pulley gear of multi-line cutting machine according to claim 2 is characterized in that the axle body of described pulley spindle (1) forms a circle inner groovy, and the O type circle (7) that is used for sealing between pulley spindle (1) lateral wall and the end cap (4) is installed on the inner groovy.

4. according to the pulley gear of claim 1 or 3 described multi-line cutting machines, it is characterized in that the upward elastic spring (9) of a pair of end cap of setting-in (4) axial location of described pulley spindle (1), the outer end of described pulley spindle (1) connects a nut (11).