CN202097413U

CN202097413U - Machine tool spindle

Info

Publication number: CN202097413U
Application number: CN2011200802432U
Authority: CN
Inventors: 吴全定
Original assignee: Changzhou Songyang Machinery & Electronics Co Ltd
Current assignee: Changzhou Songyang Machinery & Electronics Co Ltd
Priority date: 2011-03-24
Filing date: 2011-03-24
Publication date: 2012-01-04
Anticipated expiration: 2021-03-24

Abstract

The utility model relates to a machine tool spindle, which comprises a mandrel, bearings, a front-end pressure cap, a rear-end pressure cap and bearing pressure caps. The bearings are sleeved on the mandrel through retainer rings, the front-end pressure cap and the rear-end pressure cap are disposed at two ends of the mandrel respectively, the bearing pressure caps are disposed on the bearings, and a spacer ring is disposed between each two adjacent bearings and includes an upper tier and a lower tier, while the upper tier and the lower tier act to an inner ring and an outer ring of the corresponding bearing respectively. The machine tool spindle is stable in operation, low in noise and long in service life, and has fine market value.

Description

A kind of machine tool chief axis

Technical field

The utility model belongs to machine tool field, is specifically related to a kind of machine tool chief axis.

Background technology

Main shaft is the main frock in the industrial processes, and its precision and efficient directly have influence on out the quality and the output of finished product.Traditional main shaft comprises an axle core, and said axle core is arranged on the workbench, and an end of axle core connects the motor equal power device; The axle core is provided with some bearings that are used to reduce friction; Groove that the gland bearing is provided with on through workbench is being set with the fixed position on the two ends of axle core and the bearing, but also only through groove fixed position in addition, like this in the spindle operation process; Bearing can be beated because of vibration; So bearing is damaged easily, and causes a large amount of noises in the process of operation, and bearing is beated and also can be made the lost of life of main shaft simultaneously.The water-tight device of traditional main shaft is too simple in addition, and the cooling fluid that makes main shaft in operate as normal, be used to cool off is penetrated into an in-core portion, has also reduced axle core service life.

Summary of the invention

To the problems referred to above, the purpose of the utility model provides that a kind of working stability, noise are little, the lathe bearing of long service life.

For realizing above-mentioned purpose, the utility model adopts following technological means to realize:

A kind of machine tool chief axis; Comprise a core, bearing, front end gland, rear end gland, bearing gland, said bearing is connected on the core through shield ring sleeve, at the two ends of axle core front end gland and rear end gland is set respectively; Bearing gland is set on bearing; Between adjacent two bearings, spacer ring is set, said spacer ring is two-layer up and down, and it acts on the inner ring and the outer ring of bearing respectively.

As a kind of improvement of the utility model, the thickness of said spacer ring is 5-7mm, preferred 6mm.

The utility model is through being used to alleviate the gap between bearing in that spacer ring is set on the bearing; Beated in the outer ring of bearing reduces; In the process of operation, can reduce noise, bearing worked under optimal state, thereby prolong the life-span of main shaft.

Description of drawings

Fig. 1 is the structural representation of the utility model machine tool chief axis;

Fig. 2 is the partial enlarged drawing of the A part of the utility model.

Wherein: the 1st, rear end gland, the 2nd, spacer ring, the 3rd, back-up ring B, the 4th, back-up ring A, the 5th, front end gland, the 6th, bearing gland, the 7th, a core, 8 are that first capillary groove, 9 is that second capillary groove, 10 is the 3rd capillary grooves, the 11st, get rid of oil groove, the 12nd, oil leaking hole.

The specific embodiment

Below in conjunction with accompanying drawing the utility model is further detailed:

The utility model discloses a kind of machine tool chief axis, it comprises an axle core 7, socket bearing on axle core 7, and in particular, bearing is for be provided with in groups, and each group is provided with two pieces of bearings at least, and said bearing is arranged on the position near axle core 7 two ends.Bearing is provided with bearing gland 6 with rigid bearing, is provided with back-up ring B or back-up ring A at the two ends of bearing, back-up ring B or back-up ring A is set decides according to the actual putting position of practical bearing.Front end gland 5 and the relative position of rear end gland 1 in order to fixed axis core 7 are set respectively at the two ends of axle core 7.

The difference of the utility model and existing main shaft is that the main shaft among the present invention is provided with capillary groove; Said capillary groove is divided into first capillary groove 8, second capillary groove 9 and the 3rd capillary groove 10; Described first capillary groove 8 and second capillary groove 9 are arranged on the core 7, for annular groove designs; Said the 3rd capillary groove 10 is arranged on the front end gland 5, for labyrinth type designs.In particular, what described first capillary groove 8 and second capillary groove 9 were arranged on front end gland 5 gets rid of oil groove 11 places, and described the 3rd capillary groove 10 is arranged on oil leaking hole 12 places that are provided with on the front end gland 5.

When cooling agent infiltrates through the slit between front end gland 5 and the axle core 7, will be detained through first capillary groove 8, and then be thrown on the front end gland 5 of outside by main shaft, because gravity, water just down flows to the bottom oil leaking hole 12 of front end gland 5, thereby flows out; If under the big situation of amount of coolant, break through first capillary groove 8, will get into second capillary groove 9, will flow out from oil leaking hole 12 equally.Water possibly also have in whipping and leak into main shaft inside on a small quantity because the 3rd capillary groove 10 adopted mazy design, with flowing water slowly become infiltration, infiltration will be from the 3rd road oil leaking hole 12 outflows of front end gland 5 like this.

If when having dust to get into axle core 7, after dust got into front end gland 5, the agent that will be cooled in first capillary groove 8 and second capillary groove, 9 theres was washed out, thereby flows out together with cooling agent; If some dust continues deeply, then can or not do not let it enter into main shaft inside easily by 10 interceptions of the 3rd capillary groove.

In the utility model, be provided with spacer ring 2 between the described bearing that is provided with in groups, said spacer ring 2 is two-layer up and down, it acts on the inner ring and the outer ring of bearing respectively.Spacer ring 2 is set can be used to reduce the gap between bearing and the bearing, bearing inner race is compressed, the outer ring is in optimum state; Thereby beat and reduce in the outer ring that makes bearing, is difficult for being damaged at the process middle (center) bearing that assembles, and in the process of operation, can reduce noise; Bearing is worked under optimal state, in the process of installing, disorderly do not wear the depth of parallelism of favorable and stable with seasonal bearing thereby prolong main shaft; So just improve the precision of main shaft, guaranteed the quality of output finished product, in the utility model; The thickness of said spacer ring 2 is 5-7mm, preferred 6mm.

The utility model also discloses the manufacturing process of its core simultaneously; Specifically; Be rough turn → stress processing → finish turning → heat treatment → ice-cold processing → blasting treatment → corase grind → half correct grinding → correct grinding, described axle core adopts SCM420 or 20CrMo (H) steel material.

Claims

1. machine tool chief axis; Comprise a core, bearing, front end gland, rear end gland, bearing gland, said bearing is connected on the core through shield ring sleeve, at the two ends of axle core front end gland and rear end gland is set respectively; Bearing gland is set on bearing; It is characterized in that: between adjacent two bearings, spacer ring is set, said spacer ring is two-layer up and down, and it acts on the inner ring and the outer ring of bearing respectively.

2. machine tool chief axis according to claim 1 is characterized in that: the thickness of said spacer ring is 5-7mm.