CN201008985Y

CN201008985Y - Heavy loading live center

Info

Publication number: CN201008985Y
Application number: CNU200720089672XU
Authority: CN
Inventors: 高化民; 张朝煌
Original assignee: LUOYANG MOVABLE CENTRE MACHINERY Co Ltd
Current assignee: Henan Active Centre Machinery Co., Ltd.
Priority date: 2007-03-09
Filing date: 2007-03-09
Publication date: 2008-01-23
Anticipated expiration: 2017-03-09

Abstract

An over loading active finial is provided with a seat shell, a finial axis, a front press cover, a back cover and a bearing, wherein the inside track rolling road of a cylindrical roller bearing (5) is positioned on the finial axis (9) or a bushing; a front support of the finial axis (9) adopts a front support body which is provided with the combination of the cylindrical roller bearing (5) and a thrust ball bearing (7) to endure the main load; a back support of the finial adopts a back support body which is the combination of a needle roller bearing (10) and a deep groove ball bearing (13); the bearing load of the back support is more than or equal to 50 tons. The carrying capacity of the utility model is increased more than 50 percent; the processing efficiency and the serve life of the finial are doubled. The utility model has the advantages of low cost, high processing precision, good reliability and long serve life.

Description

A kind of heavy type is carried live center

Technical field

The utility model relates to heavy roll plant equipment, is used for heavy roll a kind of heavy type mechanically specifically and carries live center.

Background technology

At present, the top back dead centre that mostly is on the market on the used roll plant equipment, though in recent years the live center technology had been used on the roll plant equipment, it mostly is mini-plant, for needed live center on the large-scale roll plant equipment, existing live center technology also is difficult to satisfy the requirement that processing was got off, ground in heavy duty, its problem is to use the life-span short, and stock-removing efficiency is low, and machining accuracy is poor, can't satisfy the needs that enterprise produces, restrict the development of enterprise.

Summary of the invention

The utility model is the deficiency that solves the problems of the technologies described above, and on the basis of drawing domestic and international heavy top characteristics, the raising that is intended to solve the live center load-bearing capacity is to satisfy the needs of heavily loaded high-efficient cutting.

The utility model is the deficiency that solves the problems of the technologies described above, the technical scheme that is adopted is: with tail spindle is that force analysis is a foundation, to the preceding support reinforcing type cylinder roller bearing and the combination of heavy thrust ball bearing of bearing main load, and cylinder roller bearing reformed, inner ring raceway is directly opened on the axle or on the axle bush, this has just improved load-bearing capacity greatly, thereby has satisfied the needs of heavily loaded high-efficient cutting.Specifically, a kind of heavy type is carried live center, be provided with a shell, tail spindle, preceding gland, bonnet and bearing, the inner ring raceway of cylinder roller bearing is directly opened on the tail spindle or on the axle bush, the cylinder roller bearing of setting and the preceding supporter that bears main load of thrust ball bearing combination are adopted in the preceding support of tail spindle, the back support of tail spindle adopts the back supporter of needle bearing and deep groove ball bearing combination, its bearing load 〉=50 ton.

The utility model is provided with sealing ring and O shape circle in preceding gland, can stop dust to enter bearing inside, has also prevented the leakage of grease simultaneously.

The utility model is provided with liner and dish spring on the axial plane of the tail spindle between needle bearing and the deep groove ball bearing.Liner is used to regulate the compression distance of dish spring, thereby makes deep groove ball bearing obtain suitable preload and thrust ball bearing is kept in touch and do not separate, and also makes needle bearing axially obtain the location simultaneously.

Bearing capacity of the present utility model has improved more than 50%, and working (machining) efficiency and top life-span are doubled.

It is low that the utility model also has a cost, machining accuracy height, good reliability, the characteristics of long service life.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

Mark among the figure: 1, screw; 2, sealing ring; 3, preceding gland; 4, O shape circle; 5, cylinder roller bearing; 6, spacer; 7, thrust ball bearing; 8, seat shell; 9, tail spindle; 10, needle bearing; 11, liner; 12, dish spring; 13, deep groove ball bearing; 14, pad; 15, screw; 16, bonnet.

The specific embodiment

Cylinder roller bearing (5) and thrust ball bearing (7) are contained on the tail spindle (9), spacer (6) is packed in the shell (8), again said modules is packed in the shell (8), load onto needle bearing (10) then, put liner (11), put into dish spring (12), load onto deep groove ball bearing (13), shell tool (14) is tightened screw (15), covers bonnet (16).Sealing ring (2) and O shape circle (4) is packed in the preceding gland (3), use screw (1) that preceding gland (3) is contained on the shell (8) again.

Claims

1. a heavy type is carried live center, comprise a shell (8), preceding gland (3), bonnet (16), it is characterized in that: the inner ring raceway of cylinder roller bearing (5) is directly opened on tail spindle (9), the preceding supporter that bears main load of the cylinder roller bearing (5) that is provided with and thrust ball bearing (7) combination is adopted in the preceding support of tail spindle (9), the back supporter that the back support of tail spindle (9) adopts needle bearing (10) and deep groove ball bearing (13) to make up, its bearing load 〉=50 ton.

2. a kind of heavy type according to claim 1 is carried live center, it is characterized in that: be provided with sealing ring (2) and O shape circle (4) in preceding gland (3).

3. a kind of heavy type according to claim 1 is carried live center, it is characterized in that: be provided with liner (11) and dish spring (12) on the axial plane of the tail spindle (9) between needle bearing (10) and the deep groove ball bearing (13).