CN213298814U

CN213298814U - Rotating shaft for machine tool and sealing structure thereof

Info

Publication number: CN213298814U
Application number: CN202021681487.1U
Authority: CN
Inventors: 戴鑫辉; 乔石; 赵晓; 吕勋恩; 李林
Original assignee: Qingdao Gaoce Technology Co Ltd
Current assignee: Qingdao Gaoce Technology Co Ltd
Priority date: 2020-08-12
Filing date: 2020-08-12
Publication date: 2021-05-28
Anticipated expiration: 2030-08-12

Abstract

The utility model discloses a pivot and seal structure for lathe, its seal structure is provided with the labyrinth that can form labyrinth including the connection face that corresponds first pivot and second pivot respectively and slots, sets up in the first sealing washer of the combination department of first pivot and second pivot and sets up in the second sealing washer of first pivot and second pivot combination department, first sealing washer is the sealing washer of different grade type with the second sealing washer, and first sealing washer sets up respectively in first mounting hole and the second mounting hole that is arranged in first pivot with the second sealing washer, and this seal structure adopts three-layer shaft seal, has strengthened sealed reliability, effectively prevents that outside water smoke dust etc. from getting into the center pin, and simultaneously, the use contains "concave" type open-ended sealing washer and can reduce the friction between sealing washer and the pivot and effectively protect the inner bearing.

Description

Rotating shaft for machine tool and sealing structure thereof

Technical Field

The utility model belongs to the technical field of the machine tool equipment, specifically speaking relates to a pivot and seal structure for lathe.

Background

In the prior art, the shaft seal of a common machine tool is generally sealed by a labyrinth seal and an O-shaped seal ring, the O-shaped seal ring is arranged between rotating shafts, because the contact area is large, high friction torque can be generated, the load of a power source is increased, and meanwhile, because the friction torque is too high, rubber ring accumulation easily occurs to the seal ring when the rotating shafts rotate relatively, the service life of the seal ring is influenced, so that sundries enter the rotating shafts, and normal production is influenced.

Accordingly, further developments and improvements are still needed in the art.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problems, a rotary shaft for a machine tool and a sealing structure thereof are proposed, which can seal the rotary shaft in a water mist grinding environment and prevent water mist, dust and the like from entering a central shaft.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides a pivot seal structure, sets up in coaxial relatively pivoted first pivot and second pivot between, its includes the labyrinth seal fluting that can form labyrinth seal, sets up first sealing washer and the second sealing washer in the combination department of first pivot and second pivot, the labyrinth seal fluting sets up the combination department at first pivot and second pivot, first sealing washer is the sealing washer of different grade type with the second sealing washer, and first pivot and second pivot combination punishment correspond first sealing washer respectively and the second sealing washer is equipped with first accommodation space and second accommodation space, and first sealing washer sets up in first accommodation space, and the second sealing washer sets up in the second accommodation space.

Preferably, the first accommodating space is a first accommodating groove formed at a joint of the first rotating shaft and the second rotating shaft on the first rotating shaft.

Preferably, the second accommodating space is a second accommodating groove formed at a joint of the first rotating shaft and the second rotating shaft on the first rotating shaft.

Preferably, the second rotating shaft is a reducer shaft, and the first sealing ring and the second sealing ring are respectively arranged on the connecting part of the first rotating shaft corresponding to the second rotating shaft with different wheelbases.

Preferably, the second rotating shaft axis corresponding to the first sealing ring is smaller than the second rotating shaft axis corresponding to the second sealing ring.

Preferably, the first sealing ring is a YX-type sealing ring.

Preferably, the second seal ring is a lip seal ring.

Preferably, the rotating shaft is provided with the rotating shaft sealing structure.

Preferably, the first rotating shaft and the second rotating shaft are respectively provided with a first power source and a second power source which enable the first rotating shaft and the second rotating shaft to rotate relatively.

Has the advantages that:

the utility model provides a pivot and seal structure for lathe, this seal structure adopt the three-layer shaft to seal, have strengthened sealed reliability, effectively prevent entering center pin such as outside water smoke dust, simultaneously, use and contain "concave" type open-ended sealing washer can reduce the friction between sealing washer and the pivot and effectively protect the inner bearing.

Drawings

Fig. 1 is a schematic view of a sealing structure of a rotating shaft for a machine tool according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a rotating shaft for a machine tool according to an embodiment of the present invention.

In the drawings: 100 first rotating shaft, 200 second rotating shaft, 300 labyrinth seal, 400 first seal ring, 500 second seal ring.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the following description, together with the drawings of the present invention, clearly and completely describes the technical solution of the present invention, and based on the embodiments in the present application, other similar embodiments obtained by those skilled in the art without creative efforts shall all belong to the protection scope of the present application. In addition, directional terms such as "upper", "lower", "left", "right", etc. in the following embodiments are directions with reference to the drawings only, and thus, the directional terms are used for illustration and not for limitation of the present invention.

As shown in fig. 1 and fig. 2, the present invention provides a shaft sealing structure, which is disposed between a first shaft 100 and a second shaft 200 that are coaxially and relatively rotatable, and includes a labyrinth seal slot capable of forming a labyrinth seal 300, and a first sealing ring 400 and a second sealing ring 500 disposed at a joint of the first shaft 100 and the second shaft 200, wherein the labyrinth seal slot is disposed at the joint of the first shaft 100 and the second shaft 200, the first sealing ring 400 and the second sealing ring 500 are different types of sealing rings, the joint of the first shaft 100 and the second shaft 200 is respectively provided with a first accommodating space and a second accommodating space corresponding to the first sealing ring 400 and the second sealing ring 500, the first sealing ring 400 is disposed in the first accommodating space, the second sealing ring 500 is disposed in the second accommodating space, and the labyrinth seal 300 is configured to prevent most of impurities such as water mist from entering the shaft body at an initial stage, the rotating shaft is protected.

Specifically, the first accommodating space is a first accommodating groove formed at a joint of the first rotating shaft 100 and the second rotating shaft 200, and the first accommodating space is disposed on the first rotating shaft 100.

Specifically, the second accommodating space is a second accommodating groove formed at a joint of the first rotating shaft 100 and the second rotating shaft 200, and the second accommodating groove is formed in the first rotating shaft 100.

Specifically, the second rotating shaft 200 is a reducing shaft, the first sealing ring 400 and the second sealing ring 500 are respectively arranged at the connecting part of the first rotating shaft 100 corresponding to the second rotating shaft 200 with different wheel bases, and the sealing rings are arranged on the different wheel bases, so that the whole sealing structure is more three-dimensional, and sundries are more difficult to enter the main shaft.

Specifically, the shaft diameter of the second rotating shaft 200 corresponding to the first seal ring 400 is smaller than the shaft diameter of the second rotating shaft 200 corresponding to the second seal ring 500.

Specifically, first sealing washer 400 is YX type sealing washer, and YX type sealing washer has "concave" type opening and can reduce the friction between sealing washer and the pivot when debris such as water smoke dust get into the center pin, can effectively increase the life of pivot.

Specifically, the second seal ring 500 is a lip seal ring, which is deformed under the action of pressure to make the lip closely contact with the seal surface to realize sealing, and when the first rotating shaft 100 and the second rotating shaft 200 move relatively, the friction force caused by the lip seal ring is small, the friction coefficient is stable, and the sealing degree can be automatically improved along with the increase of pressure.

The rotating shaft sealing structure is arranged on the rotating shaft.

Specifically, the first rotating shaft 100 and the second rotating shaft 200 are respectively provided with a first power source and a second power source which enable the first rotating shaft 100 and the second rotating shaft 200 to rotate relatively.

In a preferred embodiment, the sealing ends of the first sealing ring 400 and the second sealing ring 500 are angular, so that the contact area between the sealing structure and the rotating shaft can be reduced, and an excessively high friction torque is avoided, thereby eliminating the influence on the service life of the sealing ring and the work of the rotating shaft due to the accumulation of rubber rings caused by the rotation of the sealing rings.

The sealing ring of the structure is smaller than that of the traditional structure, so that the load of the power source can be reduced, and the service life can be prolonged.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the scope of the invention, i.e. the present invention is intended to cover all equivalent variations and modifications within the scope of the present invention.

Claims

1. The utility model provides a pivot seal structure, sets up in coaxial relatively pivoted first pivot and second pivot between, its characterized in that, including can form labyrinth seal's labyrinth seal fluting, set up in first sealing washer and the second sealing washer of the joint department of first pivot and second pivot, labyrinth seal fluting sets up the joint department at first pivot and second pivot, first sealing washer is the sealing washer of different grade type with the second sealing washer, and first pivot is equipped with first accommodation space and second accommodation space with the second sealing washer with second pivot joint punishment corresponding first sealing washer respectively, and first sealing washer sets up in first accommodation space, and the second sealing washer sets up in the second accommodation space.

2. The sealing structure of claim 1, wherein the first receiving space is a first receiving groove provided at a joint of the first rotating shaft and the second rotating shaft on the first rotating shaft.

3. The sealing structure of claim 1, wherein the second receiving space is a second receiving groove provided at a junction of the first rotating shaft and the second rotating shaft on the first rotating shaft.

4. The rotary shaft sealing structure according to claim 1, wherein the second rotary shaft is a reducer shaft, and the first seal ring and the second seal ring are respectively disposed at connecting portions of the first rotary shaft corresponding to different axial distances of the second rotary shaft.

5. The rotary shaft sealing structure according to claim 4, wherein a second rotary shaft axial diameter corresponding to the first sealing ring is smaller than a second rotary shaft axial diameter corresponding to the second sealing ring.

6. The rotary shaft sealing structure according to claim 5, wherein the first seal ring is a YX-type seal ring.

7. The rotary shaft sealing structure according to claim 5, wherein the second seal ring is a lip seal.

8. A spindle for a machine tool, characterized in that the spindle is provided with a spindle sealing structure according to any one of claims 1 to 7.

9. The spindle for machine tool according to claim 8, wherein the first spindle and the second spindle are respectively provided with a first power source and a second power source which can make the first spindle and the second spindle relatively rotate.