CN217045992U

CN217045992U - Live center with high sealing performance

Info

Publication number: CN217045992U
Application number: CN202220728712.5U
Authority: CN
Inventors: 高化民
Original assignee: HENAN MOVABLE CENTRE MACHINERY CO Ltd
Current assignee: HENAN MOVABLE CENTRE MACHINERY CO Ltd
Priority date: 2022-03-31
Filing date: 2022-03-31
Publication date: 2022-07-26
Anticipated expiration: 2032-03-31

Abstract

The utility model provides a high leakproofness ability live center, is equipped with the apical axis of apical cover and sets up the apical head of keeping away from apical cover one end at the apical axis, and overhead the cover of apical is equipped with the preceding gland that is used for sealed apical cover, apical axis and apical head, the junction of preceding gland and apical cover is equipped with first order seal structure, the junction of preceding gland and apical axis is equipped with second level seal structure, the junction of preceding gland and apical head is equipped with third level seal structure. The utility model discloses can prevent external impurity to the inside invasion of live center through the tertiary seal structure omnidirectional that sets up, promote sealed effect, reduce live center's wearing and tearing.

Description

Live center with high sealing performance

Technical Field

The utility model relates to a machining auxiliary assembly technical field, concretely relates to high sealing performance live center.

Background

The live center is an auxiliary tool widely applied to the field of machining and plays a role in supporting and pressing a workpiece to be machined. When the live center is used, the live center is easily influenced by external impurities on a processing site, the external impurities comprise dust, powder, water, grinding fluid, grinding particles and other grease mixtures on the processing site, and the impurities are easily mixed into the live center, so that the wear of the live center is accelerated, the live center has to be frequently replaced, the processing efficiency is influenced, and the production cost is increased.

The existing live center is usually prevented from being invaded by external impurities through the sealing ring, the sealing effect of the live center is general in the using process of the live center, especially the invasion of grinding fluid and grinding particles is poor, and the phenomenon of live center abrasion still commonly exists.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a high sealing performance live center has solved current live center in the use, because of the live center wearing and tearing general problem that sealed effect generally brought.

The utility model discloses a reach the technical scheme that above-mentioned purpose adopted and be:

a high-sealing-performance live center comprises a center shaft and a center head, wherein a center sleeve is sleeved on the center shaft, the center head is arranged at one end, far away from the center sleeve, of the center shaft, a front gland used for sealing the center sleeve, the center shaft and the center head is sleeved on the center head, a first-stage sealing structure is arranged at the joint of the front gland and the center sleeve, a second-stage sealing structure is arranged at the joint of the front gland and the center shaft, and a third-stage sealing structure is arranged at the joint of the front gland and the center head.

As an optimized scheme of the utility model, first order seal structure is O type sealing washer.

As an optimized proposal of the utility model, the second-stage sealing structure is a framework sealing ring.

As a preferred scheme of the utility model, the skeleton sealing washer is TC skeleton sealing washer.

As an optimized scheme of the utility model, third level seal structure sets up in the junction of preceding gland and apex axle and apex head.

As a preferred scheme of the utility model, third level seal structure is V type sealing washer.

As a preferred scheme of the utility model, the one end that the apical cap cover is used for with preceding gland butt joint embeds there is first bearing and the second bearing of being convenient for install the apical axis.

As a preferred scheme of the utility model, first bearing is cylindrical roller bearing, the second bearing is angular contact ball bearing.

The utility model discloses beneficial effect:

the utility model discloses a live center adopts tertiary seal structure, in live center use, first order seal structure can prevent that external impurity from getting into inside the live center along the clearance of preceding gland and apex cover, second level seal structure can prevent that external impurity from getting into inside the live center along the clearance between preceding gland and the apex axle, second level seal structure can prevent that external impurity from getting into inside the live center along the clearance between preceding gland and apex and the apex axle, reduce the wearing and tearing of impurity to the live center, tertiary seal structure can be all-round prevent external impurity to the inside invasion of live center, sealing effect has been promoted, live center's wearing and tearing have been reduced.

Drawings

Fig. 1 is a schematic structural view of a live center with high sealing performance provided by the present invention.

The labels in the figure are: 1. the first level oil seal structure, 2, second level oil seal structure, 3, third level seal structure, 4, apex head, 5, preceding gland, 6, first bearing, 7, second bearing, 8, apex cover, 9, apex axle.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific embodiments, wherein in the description of the present invention, it is to be noted that, unless otherwise specified, "a plurality" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The utility model provides a specific embodiment of high sealing performance live center:

as shown in fig. 1, the high-sealing-performance live center of the present embodiment includes a live center body, the live center body includes a tip sleeve 8, a tip shaft 9, a tip head 2 and a front gland 5, wherein, the tip sleeve 8 is sleeved on the tip shaft 9, which wraps up one end of the whole tip shaft 9, the tip head 4 is disposed at the other end of the tip shaft 9, and is disposed opposite to the tip shaft 9 wrapped up one end by the tip sleeve 8, the front gland 5 is sleeved on the tip head 4, and the front gland 5 is in close contact with the tip head 4, the tip sleeve 8 and the tip shaft 9, and is used for sealing the tip shaft 9 and the tip head 2.

When the center sleeve 8 and the center shaft 9 are installed, taking fig. 1 as an example, a first bearing 6 and a second bearing 7 are usually embedded in the center sleeve 8, for example, the first bearing 6 is a cylindrical roller bearing, the second bearing 7 is an angular contact ball bearing, the center shaft 9 is sleeved in the center sleeve 8 through the first bearing 6 and the second bearing 7, it can be understood that the center sleeve 8 wraps the center shaft 9 by arranging a rear gland at the tail end of the center sleeve 8, and the center shaft 9 can be screwed on the rear gland to adjust the center shaft 9, which is known by those skilled in the art, and will not be described in detail herein.

In order to better prevent external impurities from invading the inside of the live center, a first-stage sealing structure 1 is arranged at the joint of the front gland 5 and the center sleeve 8, the first-stage sealing structure can adopt an O-shaped sealing ring, the O-shaped sealing ring is endowed with initial sealing capacity through axial precompression during installation, the effects of preventing internal leakage and external leakage are achieved, external dust, powder, water, cutting fluid, cutting chips and the like are effectively prevented from entering the inside of the live center along the gap between the front gland 5 and the center sleeve 8, and the abrasion of the impurities to the live center is reduced.

The second-stage sealing structure 2 is arranged at the joint of the front gland 5 and the tip shaft 9, the second-stage sealing structure 2 can adopt a framework sealing ring, such as a TC framework sealing ring, after the TC framework sealing ring is installed, the inner diameter of the framework sealing ring is slightly smaller than the outer diameter of the tip shaft 9 in a free state, namely, a certain interference magnitude exists, after the TC framework sealing ring is installed in place, a certain pretightening force is generated on the tip shaft by the pressure of an oil seal cutting edge of the TC framework sealing ring and the contractive force of a self-tightening spiral spring, lubricating oil can be coated when the oil seal cutting edge is installed, when the tip shaft 9 rotates, the oil seal cutting edge of the TC framework sealing ring can form a layer of oil film which plays a role of rotary sealing under the tension of the oil film, so that the TC framework oil seal can isolate parts needing to be lubricated from the force-exerting parts in a transmission part, avoid the leakage of the lubricating oil and prevent external dust, powder, water and dust at the same time, Impurities such as cutting fluid and cutting particles enter the live center along the gap between the front gland 5 and the live center shaft 9, so that the abrasion of the impurities to the live center is reduced.

A third-stage sealing structure 3 is arranged at the joint of the front gland 5 and the ejector pin 2, and taking the example shown in fig. 1 as an example, the third-stage sealing structure 3 can be arranged at the joint of the front gland 5 and the ejector pin shaft 9 as well as the ejector pin 2, specifically, a V-shaped sealing ring can be adopted, the V-shaped sealing ring is used for forming a V-shaped waterproof end face oil seal at the joint of the front gland 5 and the ejector pin shaft 9 as well as the ejector pin 2, after the installation, the V-shaped sealing ring is tightly wrapped on the ejector pin shaft 9 by the elasticity of rubber, a certain degree of shaft eccentricity is allowed, when the live center is used, external impurities such as dust, powder, water, cutting fluid, cutting particles and the like are prevented from entering the inside of the live center along the gap between the front gland 5 and the ejector pin shaft 9, the abrasion of the live center caused by the impurities is reduced, in addition, the lip contact pressure of the V-shaped sealing ring is small, the contact pressure is reduced along with the increase of the linear velocity, and the wear resistance is good, and the front end cover 5 is arranged at the abrasion part, so that the cost for replacing the front end cover is lower.

The live center of this embodiment adopts tertiary seal structure, and in the live center use, tertiary seal structure can be all-round prevents that external impurity from to the inside invasion of live center, has promoted sealed effect, reduces the wearing and tearing of live center.

It should be noted that, although the prior art has not been described in detail herein, the above embodiments are merely provided to illustrate the present invention, but the present invention is not limited to the above embodiments, and any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention all fall within the scope of the present invention.

Claims

1. The utility model provides a high leakproofness ability live center, is equipped with apex axle (9) of apex cover (8) and sets up apex head (4) of keeping away from apex cover (8) one end in apex axle (9) including the cover, and the cover is equipped with preceding gland (5) that are used for sealed apex cover (8), apex axle (9) and apex head (4) on apex head (4), its characterized in that: preceding gland (5) are equipped with first order seal structure (1) with the junction of apex cover (8), preceding gland (5) are equipped with second level seal structure (2) with the junction of apex axle (9), preceding gland (5) are equipped with third level seal structure (3) with the junction of apex (4).

2. A high sealing performance live center according to claim 1, wherein the primary sealing structure (1) is an O-ring.

3. A high sealing performance live center according to claim 1, wherein the second stage sealing structure (2) is a skeleton sealing ring.

4. The live center with high sealing performance according to claim 3, wherein the skeleton sealing ring is a TC skeleton sealing ring.

5. A high sealing performance live center according to claim 1, wherein the third sealing structure (3) is arranged at the joint of the front gland (5) and the center shaft (9) and the center (4).

6. A high sealing performance live center according to claim 5, wherein the third stage sealing structure (3) is a V-shaped sealing ring.

7. A high-sealability live center according to claim 1, wherein the end of the center sleeve (8) for butting against the front gland (5) is provided with a first bearing (6) and a second bearing (7) for mounting a center shaft (9) inside.

8. A high-sealing-performance live center according to claim 7, characterized in that the first bearing (6) is a cylindrical roller bearing and the second bearing (7) is an angular contact ball bearing.