CN2553173Y

CN2553173Y - Thrust bearing for drilling bit

Info

Publication number: CN2553173Y
Application number: CN02236907U
Authority: CN
Inventors: 徐进来
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-06-03
Filing date: 2002-06-03
Publication date: 2003-05-28
Anticipated expiration: 2012-06-03

Abstract

The utility model relates to a thrust bearing of a drill bit which has the effects of preventing dust and a cutting layer from entering, reducing the air drying to internal lubricating oil, and having strong limiting capability; the utility model is mainly a thrust bearing with an upper bearing sheet, a lower bearing sheet, and a ball bearing shaft sheet, the upper end (or the lower end) of the thrust bearing is provided with a cladding cover with a symmetrical diameter, the cladding cover is provided with a baffle sheet and a central through hole, and can hold the integral thrust bearing, the baffle sheet baffles the gap between the thrust bearing and the upper and lower bearing sheets, thereby the utility model can prevent the dust and the cutting layer from entering the gap, ensure the bearing not to have friction noise but have durability when working, reduce the air entering the gap freely, reduce the air drying to the lubricating oil in the bearing, and keep long term smooth effect, and also has the functions of excess weld and intensity enhancement. The utility model has the advantages of enabling the thrust bearing to achieve better practicability and to enhance the effects.

Description

The drill bit thrust bearing

Technical field

The utility model is a kind of drill bit thrust bearing, be used in have fixed base, the thrust bearing of rotating shaft, chuck.

Background technique

The thrust bearing of drill bit, as shown in Figure 1, be drill bit or the screw tap that is used to have fixed base 1, for example: multiple borer, multiaxis tapping machine, pedestal (fixed base) with multiaxis interlock, when chuck 3 rotating shafts 2 are installed on fixed base 1, two thrust bearing 10 auxiliary torsion, oscillatory forces of resisting up and down need be arranged promptly.And, the thrust bearing 10 of traditional type, it is constructed all as shown in Figure 1, is one to be laid with the axle sheet 7 of ball 8, and each group is established and is held

sheet

5,6 up and down, holds

sheet

5,6 to have annular arc groove 60 and provide putting of ball 8 fixed and roll; Above-mentioned structure has following shortcoming in fact:

(1) two holds

sheet

5,6 and 7 of sheets of axle, must gapped H, and this gap H will cause entering of dust, or when cutting, produce than the upper cut layer, also can enter, that is axle sheet 7, ball 8 can be subjected to the interference of foreign matter, and influence smoothness, generation friction noise, What is more, causes wearing and tearing and fault.

(2) gap H also can provide air easier smooth and easy circulation, and axle sheet 7 balls 8 and hold 5,6 of sheets have lubricant oil, and the smooth and easy circulation of air just is formed with air-dry effect, makes the lubricant oil drying, and produces good, the easy to wear even not stuck problem of smoothness.

(3) each member does not give periphery and coats qualification, and is more loosening, so its intensity is relatively poor.

The model utility content

In order to overcome above-mentioned the deficiencies in the prior art, the purpose of this utility model provides a kind of drill bit thrust bearing, it has the dust of strick precaution, cutting layer, increase intensity, reduces built-in lubrication oil by the air-dry effect of air, and has more durable, as to reduce noise practical effect.

Another purpose of the present utility model provides a kind of drill bit thrust bearing, its incorporate location of Strengthenable thrust bearing, and increase intensity.

In order to achieve the above object, the utility model provides a kind of drill bit thrust bearing, be one to have the chuck of rotating shaft, when being assembled in fixed base, on contacting with fixed base, following two ends, each suit thrust bearing, thrust bearing be by one be laid with ball the axle sheet, the sheet that holds that has annular arc groove is up and down formed, this thrust bearing is assembled in one and coats in the cover, the coating center of being covered with into has the through hole of corresponding bearing hole, and periphery is provided with the shielding plate of one, and makes thrust bearing just wherein ccontaining, be and do not rivet, and shielding plate just blocks the sheet that holds in thrust bearing, the side of axle sheet forms to cover and holds sheet, the effect in axle sheet gap is by above-mentioned structure, and thrust bearing intensity is increased, especially, can take precautions against dust, foreign matters such as cutting layer enter in the thrust bearing member, and, reduce the air-dry lubricant oil in it of air ventilation, and it is good to have a sliding compliance, durable effect.

The utility model has the advantages that;

1, the utility model is provided with the coating cover of a tool through hole, shielding plate, and do not coat whole thrust bearing with rivetting, pass through shielding plate, and can block dust, cutting layer enter the thrust bearing gap, and also can reduce air circulation, and reduce the air-dry problem of lubricant oil, have that smoothness is good, a low noise, durable effect.

2, by coating cover restrictions thrust bearing, the incorporate location of Strengthenable thrust bearing, and increase intensity.

Description of drawings

Below in conjunction with specification and accompanying drawing the utility model is elaborated:

Fig. 1 is the traditional type structure and (a) decomposes (b) and make up cross-sectional schematic;

Fig. 2 is the utility model three-dimensional exploded view;

Fig. 3 is that the utility model combination is analysed and observe and enlarged view.

Symbol description among the figure:

1 fixed base, 8 balls

2 rotating shafts, 10 thrust bearings

3 chucks 20 coat cover

4 drill bits, 21 shielding plates

5,6 hold sheet 22 through holes

7 sheet 60 arc grooves

Embodiment

See also Fig. 2,3, be one to have the chuck 3 of rotating shaft 2, when being assembled in a fixed base 1, at the upper/lower terminal that contacts with fixed base, each suit thrust bearing 10, thrust bearing 10 by one be laid with the axle sheet 7 of

ball

8,5,6 of the sheets that hold that have an annular arc groove 60 are up and down formed: it is characterized in that:

This thrust bearing 10 is installed on one and coats in the cover 20, coat cover 20 and be set as the through hole 22 that the center has corresponding bearing hole, periphery is provided with the shielding plate 21 of one, and make thrust bearing 10 just wherein ccontaining, be and do not rivet, and shielding plate 21 just blocks the side that holds

sheet

5,6, axle sheet 7 in thrust bearing 10, forms the effect of holding sheet, axle sheet gap of covering.

By above-mentioned structure, effect of the present utility model, advantage, detail is described as follows again:

Please consult Fig. 3 again, therefore thrust bearing 10 of the present utility model, has effect, the advantage of following each side for coating 20 coatings of cover:

(1) gap of

holding sheet

5,6 and 7 of sheets of axle of thrust bearing 10, can be shielding plate 21 blocks, so, the mistake that can take precautions against foreign matters such as dust, cutting layer enters, and keep pure sliding rolling effect, will be understood that not have the friction noise, the improper wear problems that produce because of impurity, and then have good, the durable effect of the sliding compliance of maintenance.

(2) gap of thrust bearing 10 is 20 coatings of coating cover, but and therefore the smooth and easy gap that circulates in of blocks air, for the lubricant oil in it, does not more have air-dry effect, keep moistening lubrication effect, the lubricant oil serviceability is good.

(3) whole members of thrust bearing 10 are 20 coatings of coating cover, and have the effect of spacing each member, and, just form the reinforcing effect of firm combination power, therefore, can promote the intensity of thrust bearing 10, the problem of more do not have improper dispersion, breaking.

In sum, structure of the present utility model in drill bit thrust bearing field of articles, is unprecedented model utility really, and the effect of being reached, and also has practicability and promotes effect, really meets the regulation of Patent Law, special proposition patent application.

Claims

1. drill bit thrust bearing, be one to have the chuck of rotating shaft, when being assembled in fixed base, at the upper/lower terminal that contacts with fixed base, each suit thrust bearing, thrust bearing by one be laid with the axle sheet of ball, the sheet that holds that has an annular arc groove is up and down formed, it is characterized in that: this thrust bearing is assembled in one and coats in the cover, the coating center of being covered with into has the through hole of corresponding bearing hole, periphery is provided with the shielding plate of one, and make thrust bearing just wherein ccontaining, be and do not rivet, and shielding plate just blocks the side that holds sheet, axle sheet in thrust bearing.