CN203835983U - Rolling bearing axial-follow-up device for main shaft - Google Patents

Abstract

The utility model discloses a rolling bearing axial-follow-up device for a main shaft. The rolling bearing axial-follow-up device is used for enabling the main shaft to rotate smoothly; the rolling bearing axial-follow-up device for the main shaft comprises a bearing and a shell of a bearing box at the free end of the bearing; one end of the main shaft is located in the shell; a mounting hole coaxial with the main shaft is formed in the housing; the bearing comprises an inner ring, an outer ring and a roller located between the inner ring and the outer ring; the inner ring sleeves the main shaft without rotating; the outer ring is nested in the mounting hole; a follow-up ring sleeves the outer ring in interference fit or transition fit; the outer surface of the follow-up ring is matched with the mounting hole and an anti-rotating groove is formed in the follow-up ring; an anti-rotating pin matched with the anti-rotating groove is arranged on the shell; meanwhile, an annular pressure oil groove is formed in the outer surface of the follow-up ring, sealing rings are arranged at two sides of the pressure oil groove and a pressure oil inlet matched with the pressure oil groove is formed in the wall of the mounting hole. The rolling bearing axial-follow-up device for the main shaft is small in dimension, high in economic benefit, stable in use and relatively long in service life.

Description

The axial followup device of rolling bearing for main shaft

technical field

The utility model relates to bearing supplementary equipment technical field, especially relates to the axial followup device of a kind of main shaft rolling bearing.

Background technique

Main shaft uses in the equipment of rolling bearing, because the variation of temperature, such as: the variation of medium temperature, the variation of ambient temperature, all can cause the main axis length in use to change, cause bearing to be subjected to displacement.Main solution has two: one, adopts roller bearing.Although the method can be dealt with problems, and bearing is easy to buying, cannot realize aligning and cause the concentricity requirement of two stomidiums to main spindle box body higher, and when work heating greatly, noise greatly then uses and is subject to certain restrictions.Its two, strengthen the gap between bearing outer ring and bearing housing.While adopting the method, because serviceability temperature excursion is larger, and the gap of bearing outer ring and housing can not put too much, in the time that bearing temperature changes, inner ring drives roller and outer ring to move the frictional force then overcoming by force between outer ring and housing endoporus, makes bearing be subject to larger axial force.

Model utility content

The purpose of this utility model is to provide the axial followup device of a kind of main shaft rolling bearing, and it has, and size is little, economic benefit is high, and uses feature stable, that the life-span is grown.

The technological scheme that the utility model adopts is: the axial followup device of rolling bearing for main shaft, it is for making the smooth and easy rotation of main shaft, this main shaft comprises the housing of bearing and bearing free end bearing box with the axial followup device of rolling bearing, one end of this main shaft is positioned at this housing, this housing is provided with and the mounting hole of this main shaft coaxial inner conductor, this bearing comprises inner ring, outer ring and the roller between this inner ring and outer ring, this inner ring is non-rotatable to be enclosed within on this main shaft, this outer ring sleeve is in this mounting hole, on described outer ring, the cover of interference fit or transition fit has follower ring, the outer surface of this follower ring and this mounting hole match, and this follower ring is provided with anti-rotation groove, the stop pin that this housing is provided with and this anti-rotation groove matches, simultaneously, on the outer surface of this follower ring, have annular pressure oill tank, the both sides of this pressure oill tank are equipped with seal ring, and, on the hole wall of this mounting hole, have and pressure oil entrance that this pressure oill tank matches.

Described housing is provided with lubricating oil inlet, and the inner of this lubricating oil inlet is provided with the oil outlet of inclination, and this oil outlet is compatible with the gap between this inner ring and this outer ring.

The advantage that the utility model has is: size is little, economic benefit is high, and use is stable, the life-span is longer.Main shaft of the present utility model with the axial followup device of rolling bearing by follower ring being set between the outer ring at bearing and the mounting hole of housing, between this follower ring and mounting hole, can there is suitable gap to ensure when limiting temperature and gap when distortion when machining error and actual use is greater than 0, and adopt hydraulic oil to be lubricated at any time between follower ring and mounting hole, the gap that the load that spring bearing follower ring is subject to is eliminated between follower ring and mounting hole simultaneously rotates the vibration influence causing to main shaft, and can lubricate the parts of relative movement, and, this follower ring of the cooperation of anti-rotation groove and stop pin only can move axially and be non-rotatable, then when bearing need to move axially, the required frictional force overcoming is minimum, be only the frictional force of seal ring, and then be mainly radial force when bearing operation, because of follower ring and housing endoporus matching gap insensitive, tolerance range is wider, reduce difficulty of processing, be not subject to the impact of the factors such as temperature variation simultaneously, when type selecting without adding too much safety coefficient, can adopt the bearing of reduced size, and operating noise is low, generate heat little, overall cost is low, can greatly extend the working life of bearing.

Brief description of the drawings

Below in conjunction with drawings and Examples, the utility model is further illustrated:

Fig. 1 is that embodiment's of the present utility model master looks sectional view;

Fig. 2 is the A portion enlarged view of Fig. 1.

In figure: 10, bearing, 11, inner ring, 12, roller, 13, outer ring; 20, follower ring, 21, anti-rotation groove, 22, pressure oill tank, 23, seal ring; 30, housing, 31, mounting hole, 311, pressure oil entrance, 32, stop pin, 33, lubricating oil inlet, 331, oil outlet; 100, main shaft.

Embodiment

Embodiment, is shown in shown in Fig. 1 and Fig. 2: the axial followup device of main shaft rolling bearing, it is for ensureing the smooth and easy rotation of main shaft 100.One end of this main shaft 100 is positioned at the housing 30 of a bearing free end bearing box, and this housing 30 is provided with and the mounting hole 31 of these main shaft 100 coaxial inner conductors.Concrete, this main shaft comprises bearing 10 with the axial followup device of rolling bearing, this bearing 10 comprises inner ring 11, outer ring 13 and the roller 12 between this inner ring 11 and outer ring 13.This roller 12 can be ball and roller, and this roller 12 is positioned at retainer.This inner ring 11 is non-rotatable to be enclosed within on this main shaft 100.Such as, being sheathed on this main shaft 100 along with this main shaft 100 rotates of these inner ring 11 interference or transition fit, can also be provided with the locking nut of this inner ring 11 of location on this main shaft 100.This outer ring 13 is enclosed within this mounting hole 31.Further say, on this outer ring 13, the cover of interference fit or transition fit has follower ring 20, and the outer surface of this follower ring 20 and this mounting hole 31 match, and this follower ring 20 is provided with anti-rotation groove 21, the stop pin 32 that this housing 30 is provided with and this anti-rotation groove 21 matches.That is, after screwing this stop pin 32, the end of this stop pin 32 withstands in this anti-rotation groove 21, makes this follower ring 20 non-rotatable.Certainly, the length of this anti-rotation groove 21 on the direction of axis line that is same as this main shaft 100 is greater than the inner external diameter of this stop pin 32, thereby ensures this follower ring 20 to move axially and non-rotatable.Meanwhile, have annular pressure oill tank 22 on the outer surface of this follower ring 20, the both sides of this pressure oill tank 22 are equipped with seal ring 23.And, on the hole wall of this mounting hole 31, having and pressure oil entrance 311 that this pressure oill tank 22 matches, this pressure oil entrance 311 can be furnished with lid., pressure oil is in this pressure oil entrance 311 enters to this pressure oill tank 22.Like this, in the time that this main shaft 100 drives this bearing 10 to move axially because length changes, the required frictional force overcoming in this outer ring 13 is minimum, and then this bearing 10 is mainly radial force while turning round, be not subject to the impact of the factors such as the turbidity test in temperature variation, machining accuracy, assembly precision and this housing 30, when type selecting without adding too much safety coefficient, can adopt the bearing of reduced size, and operating noise is low, it is little to generate heat, overall cost is low, can greatly extend the working life of this bearing 10.

Further say, this housing 30 is provided with lubricating oil inlet 33, and the inner of this lubricating oil inlet 33 is provided with the oil outlet 331 of inclination, and this oil outlet 331 is compatible with the gap between this inner ring 11 and this outer ring 13.That is, lubricant oil enters through this lubricating oil inlet 33 and in this oil outlet 331 drops in the gap between this inner ring 11 and this outer ring 13, thereby ensures the good lubrication of this bearing 10.

The foregoing is only preferred embodiment of the present utility model; not thereby limit the scope of the claims of the present utility model; every equivalent structure or conversion of equivalent flow process that utilizes the utility model specification and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.

Claims (2)

1. the axial followup device of rolling bearing for main shaft, it is for making the smooth and easy rotation of main shaft (100), this main shaft comprises the housing (30) of bearing (10) and bearing free end bearing box with the axial followup device of rolling bearing, one end of this main shaft (100) is positioned at this housing (30), this housing (30) is provided with and the mounting hole (31) of this main shaft (100) coaxial inner conductor, this bearing (10) comprises inner ring (11), outer ring (13) and be positioned at this inner ring (11) and outer ring (13) between roller (12), this inner ring (11) is non-rotatable to be enclosed within on this main shaft (100), this outer ring (13) is enclosed within this mounting hole (31), it is characterized in that: the cover of described outer ring (13) upper interference fit or transition fit has follower ring (20), the outer surface of this follower ring (20) and this mounting hole (31) match, and this follower ring (20) is provided with anti-rotation groove (21), the stop pin (32) that this housing (30) is provided with and this anti-rotation groove (21) matches, simultaneously, on the outer surface of this follower ring (20), have annular pressure oill tank (22), the both sides of this pressure oill tank (22) are equipped with seal ring (23), and, on the hole wall of this mounting hole (31), have and pressure oil entrance (311) that this pressure oill tank (22) matches.

2. the axial followup device of rolling bearing for main shaft according to claim 1, it is characterized in that: described housing (30) is provided with lubricating oil inlet (33), the inner of this lubricating oil inlet (33) is provided with the oil outlet (331) of inclination, and this oil outlet (331) is compatible with the gap between this inner ring (11) and this outer ring (13).