CN215036486U

CN215036486U - Vertical high-speed grinding main shaft

Info

Publication number: CN215036486U
Application number: CN202121015446.3U
Authority: CN
Inventors: 丁伟伟; 王从军; 刘国艳
Original assignee: Strong H Machinery Technology Co ltd
Current assignee: Strong H Machinery Technology Co ltd
Priority date: 2021-05-13
Filing date: 2021-05-13
Publication date: 2021-12-07
Anticipated expiration: 2031-05-13

Abstract

The utility model relates to machining equipment, in particular to a vertical high-speed grinding main shaft, wherein a front end cover and a rear end cover respectively support the outer rings of two angular contact bearings which are arranged in a back-to-back manner, a rotor shaft penetrates through the inner ring of the angular contact bearings, and the rotor shaft is provided with two heads; the inner end of the front bearing outer ring gland is abutted against the outer ring of the foremost angular contact bearing, the inner end of the front bearing lock cap is abutted against the inner ring of the foremost angular contact bearing, and a framework oil seal is arranged in a cavity between the front bearing outer ring gland and the front bearing lock cap; the inner end of the rear bearing outer ring gland is abutted to the outer ring of the rearmost angular contact bearing, the inner end of the rear bearing lock cap is abutted to the inner ring of the rearmost angular contact bearing, and a labyrinth structure is formed between the front bearing outer ring gland and the front bearing lock cap. The utility model is suitable for a use of high rotational speed emery wheel can improve machining efficiency, reduces the emery wheel loss.

Description

Vertical high-speed grinding main shaft

Technical Field

The utility model relates to a machining equipment, specifically say a vertical high-speed grinding main shaft.

Background

At present, a spindle of vertical grinding equipment is usually replaced by a boring and milling spindle head on the market, but the spindle has poor precision, poor protection, relatively large volume and low rotating speed, and is not suitable for driving a high-speed grinding wheel.

SUMMERY OF THE UTILITY MODEL

For overcoming one of the above-mentioned defect or defect of prior art, the utility model discloses a vertical high-speed grinding main shaft, the technical scheme who takes is:

a vertical high-speed grinding main shaft comprises a stator, a rotor, a front end cover, a rear end cover and a rotor shaft of a three-phase asynchronous motor with the rated rotating speed of 4500r/min, wherein the front end cover and the rear end cover respectively support outer rings of two angular contact bearings which are arranged in a back-to-back mode, the rotor shaft penetrates through inner rings of the angular contact bearings, and the rotor shaft is provided with double heads; the front end of the front end cover is fixedly connected with a front bearing outer ring gland, the front end of the front bearing outer ring gland is fixedly connected with a front bearing lock cap, the inner end of the front bearing outer ring gland is abutted against the outer ring of the foremost angular contact bearing, the inner end of the front bearing lock cap is abutted against the inner ring of the foremost angular contact bearing, and a framework oil seal is arranged in a cavity between the front bearing outer ring gland and the front bearing lock cap; the rear end of the rear end cover is fixedly provided with a rear bearing outer ring gland, the rear end of the rear bearing outer ring gland is fixedly connected with a rear bearing lock cap, the inner end of the rear bearing outer ring gland is abutted against the outer ring of the rearmost angular contact bearing, the inner end of the rear bearing lock cap is abutted against the inner ring of the rearmost angular contact bearing, and a labyrinth structure is formed between the front bearing outer ring gland and the front bearing lock cap.

Furthermore, the center of the rotor shaft is provided with a center hole penetrating through the front end and the rear end, and cooling water is introduced into the center hole.

Further, the rotor shaft is tapered forward at a portion located outside the front bearing locking cap to form a tapered section, a nut is screwed to the front end of the rotor shaft, and a grinding wheel is mounted on the tapered section and locked by the nut.

Compared with the prior art, the utility model discloses utilize three-phase asynchronous motor to reform transform, the inside bearing of motor adopts two sets of high accuracy angle contact ball bearings, can bear radial load and axial load simultaneously, can work under higher rotational speed, can improve main shaft rotational speed and improve the motor rigidity. The rotor shaft adopts the cavity formula, can realize that the center adds water and processes, also plays the cooling effect for the high-speed operation of main shaft, and the main shaft front end lid adopts sealing washer and mechanical type labyrinth form, can effectively prevent that dust and cutting fluid from getting into the main shaft inside, has effectively improved main shaft life, and this main shaft rotational speed can reach 4500r/min, is applicable to the use of high rotational speed emery wheel, can improve machining efficiency, reduces the emery wheel loss.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a sectional view of fig. 1.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

As shown in fig. 1-2, the vertical high-speed grinding spindle comprises a stator 1, a rotor 2, a front end cover 3, a rear end cover 4, and a rotor shaft 5 of a three-phase asynchronous motor with a rated rotation speed of 4500r/min, wherein the front end cover 3 and the rear end cover 4 respectively support outer rings of two angular contact bearings 6 arranged in a back-to-back manner, the rotor shaft 5 is arranged in an inner ring of the angular contact bearings 6 in a penetrating manner, and the rotor shaft 5 has two ends; the front end of the front end cover 3 is fixedly connected with a front bearing outer ring gland 7, the front end of the front bearing outer ring gland 7 is fixedly connected with a front bearing lock cap 8, the inner end of the front bearing outer ring gland 7 is abutted against the outer ring of the foremost angular contact bearing 6, the inner end of the front bearing lock cap 8 is abutted against the inner ring of the foremost angular contact bearing 6, and a framework oil seal 9 is arranged in a cavity between the front bearing outer ring gland 7 and the front bearing lock cap 8; the rear end of the rear end cover 4 is fixedly provided with a rear bearing outer ring gland 10, the rear end of the rear bearing outer ring gland 10 is fixedly connected with a rear bearing lock cap 11, the inner end of the rear bearing outer ring gland 10 is abutted against the outer ring of the rearmost angular contact bearing 6, the inner end of the rear bearing lock cap 11 is abutted against the inner ring of the rearmost angular contact bearing 6, and a labyrinth structure is formed between the front bearing outer ring gland 7 and the front bearing lock cap 8. The center of the rotor shaft 5 is provided with a center hole 12 penetrating through the front end and the rear end, and cooling water is introduced into the center hole 12. The rotor shaft 5 is tapered forward at a portion outside the front bearing locking cap 8 to form a tapered section 13, a nut 14 is screwed at the front end of the rotor shaft 5, and a grinding wheel is mounted on the tapered section 13 and locked by the nut 14.

The utility model discloses utilize three-phase asynchronous motor to reform transform, the inside bearing of motor adopts two sets of high accuracy angle contact ball bearings, can bear radial load and axial load simultaneously, can work under higher rotational speed, can improve main shaft rotational speed and improve the motor rigidity. The rotor shaft adopts the cavity formula, can realize that the center adds water and processes, also plays the cooling effect for the high-speed operation of main shaft, and the main shaft front end lid adopts sealing washer and mechanical type labyrinth form, can effectively prevent that dust and cutting fluid from getting into the main shaft inside, has effectively improved main shaft life, and this main shaft rotational speed can reach 4500r/min, is applicable to the use of high rotational speed emery wheel, can improve machining efficiency, reduces the emery wheel loss.

Claims

1. A vertical high-speed grinding main shaft is characterized in that: the motor comprises a stator (1), a rotor (2), a front end cover (3), a rear end cover (4) and a rotor shaft (5) of a three-phase asynchronous motor with the rated rotating speed of 4500r/min, wherein the front end cover (3) and the rear end cover (4) respectively support outer rings of two angular contact bearings (6) which are arranged in a back-to-back mode, the rotor shaft (5) penetrates through inner rings of the angular contact bearings (6), and two ends of the rotor shaft (5) extend out; the front end of the front end cover (3) is fixedly connected with a front bearing outer ring gland (7), the front end of the front bearing outer ring gland (7) is fixedly connected with a front bearing lock cap (8), the inner end of the front bearing outer ring gland (7) is abutted against the outer ring of the foremost angular contact bearing (6), the inner end of the front bearing lock cap (8) is abutted against the inner ring of the foremost angular contact bearing (6), and a framework oil seal (9) is arranged in a cavity between the front bearing outer ring gland (7) and the front bearing lock cap (8); the rear end of the rear end cover (4) is fixedly provided with a rear bearing outer ring gland (10), the rear end of the rear bearing outer ring gland (10) is fixedly connected with a rear bearing lock cap (11), the inner end of the rear bearing outer ring gland (10) is abutted to the outer ring of the rearmost angular contact bearing (6), the inner end of the rear bearing lock cap (11) is abutted to the inner ring of the rearmost angular contact bearing (6), and a labyrinth structure is formed between the front bearing outer ring gland (7) and the front bearing lock cap (8).

2. A vertical high-speed grinding spindle according to claim 1, characterized in that: the center of the rotor shaft (5) is provided with a center hole (12) penetrating through the front end and the rear end, and cooling water is introduced into the center hole (12).

3. A vertical high-speed grinding spindle according to claim 1, characterized in that: the rotor shaft (5) is tapered forwards to form a conical section (13) at the part outside the front bearing locking cap (8), the front end of the rotor shaft (5) is connected with a nut (14) in a threaded mode, and a grinding wheel is arranged on the conical section (13) and locked through the nut (14).