CN215315742U

CN215315742U - Horizontal lathe spindle transformation structure

Info

Publication number: CN215315742U
Application number: CN202120432560.XU
Authority: CN
Inventors: 崔猛; 于广涛; 陈晨; 王万鹏; 邵力; 秦双双; 常芹; 安中望; 刘强; 刘辉; 杨龙龙; 李淑涛
Original assignee: CNOOC Energy Technology and Services Ltd; CNOOC Energy Development of Equipment and Technology Co Ltd; Processing and Manufacturing Branch of CNOOC Energy Development of Equipment and Technology Co Ltd
Current assignee: CNOOC Energy Technology and Services Ltd; CNOOC Energy Development of Equipment and Technology Co Ltd; Processing and Manufacturing Branch of CNOOC Energy Development of Equipment and Technology Co Ltd
Priority date: 2021-02-26
Filing date: 2021-02-26
Publication date: 2021-12-28
Anticipated expiration: 2031-02-26

Abstract

The utility model discloses a horizontal lathe spindle reconstruction structure, which comprises a spindle and a spindle box, wherein a first bearing is arranged between the spindle and a bearing seat in the spindle box, a first spacer sleeve used for pressing an inner ring of the first bearing is fixedly arranged on the spindle, a second gear which is abutted against a front side shaft diameter is arranged on a middle shaft diameter of the spindle, a second bearing is arranged between the rear end of the spindle box and the middle shaft diameter of the spindle, a second spacer sleeve used for pressing an inner ring of the second bearing is also arranged on the middle shaft diameter, a gland fixed at the rear end of the spindle box is sleeved on the outer end surface of an outer ring of the second bearing, a chuck connecting plate which is fixed with the rear end shaft diameter in interference fit is arranged on the rear end shaft diameter of the spindle extending out of the rear end of the spindle box, the first bearing and the second bearing are both formed by conical roller bearings, and the inclined ends of the two bearings are corresponding to each other. The utility model aims to use an old numerical control horizontal lathe as a modified structure for a pipe thread lathe.

Description

Horizontal lathe spindle transformation structure

Technical Field

The utility model relates to the technical field of lathes, in particular to a horizontal lathe spindle transformation structure.

Background

The old numerical control horizontal lathe is of a single chuck connecting disc structure, and the rear end of a main shaft is not provided with a chuck connecting disc and cannot be used as a pipe thread lathe. The main bearing at the front end of the numerical control horizontal lathe is of a barrel type sliding structure, the main sliding bearing is not provided with an axial positioning thrust bearing, and an elastic compensator, a tapered roller bearing and a ball bearing at the rear end of a main shaft are arranged in the middle to form an axial positioning structure. An old numerical control horizontal lathe is provided with an oil pipe with the diameter of 27/8' and is subjected to clamping by a pipe length and a single chuck connecting disc and bending of the pipe when the turning operation of the pipe with the length of 9 meters is carried out, so that a large axial alternating load is generated and is transmitted to 12 springs of the elastic compensator, and the frequent irregular compression deformation of a spring group causes axial movement and vibration of a main shaft, thereby seriously influencing the unqualified turning quality. And under the influence of the larger axial alternating load, the abrasion of the ball bearing is accelerated, and the smooth failure is serious.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art and provide a modified structure which can use an old numerical control horizontal lathe as a pipe threading lathe.

In order to achieve the purpose, the technical scheme of the utility model is realized as follows:

a horizontal lathe spindle reconstruction structure comprises a spindle and a spindle box, wherein a sliding bearing is arranged between the spindle and the front end of the spindle box, a first gear is mounted on the front side shaft diameter of the spindle, a first bearing is arranged between the spindle and a bearing seat in the spindle box, a first spacer sleeve used for pressing an inner ring of the first bearing is fixedly arranged on the spindle, a second gear abutted against the front side shaft diameter is arranged on the middle shaft diameter of the spindle, a second bearing is arranged between the rear end of the spindle box and the middle shaft diameter of the spindle, the second bearing and the second gear are separated by a third spacer sleeve arranged on the middle shaft diameter, a second spacer sleeve used for pressing an inner ring of the second bearing is further arranged on the middle shaft diameter, a gland fixed at the rear end of the spindle box is sleeved on the outer end face of an outer ring of the second bearing, a chuck fixed and in interference fit with the rear end shaft diameter is arranged on the rear end shaft diameter of the spindle extending out of the spindle box, the first bearing and the second bearing are both composed of tapered roller bearings, and the inclined ends of the two bearings correspond to each other.

Compared with the prior art, the utility model has the following beneficial effects:

according to the utility model, the chuck connecting disc is additionally arranged at the rear end of the main shaft of the lathe, so that the chuck connecting disc is in interference fit connection with the main shaft and is used for fixing the main shaft. The chuck connecting disc is additionally arranged at the rear end of the main shaft, so that the three bearings on the main shaft are stressed integrally, and the stability of the pipe in rotation is improved. The original spring compensator of the old numerical control horizontal lathe is removed, the first spacer bush is installed instead, the lock nut on the original shaft is used for adjusting and positioning the first spacer bush, the elastic adjustment is changed into the rigid adjustment, and the axial bearing capacity of the first bearing is enhanced. The first bearing and the second bearing are both tapered roller bearings, the tapered roller bearings are used at the rear end of the old numerical control horizontal lathe, the axial bearing capacity of the rear end bearing can be enhanced, and the second bearing and the second gear are pressed tightly by the gland and the second spacer bush. And the inclined ends of the two bearings correspond to each other, so that the main shaft can be prevented from axial movement and vibration during working.

Drawings

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

Description of reference numerals:

1-main shaft, 2-main shaft box, 3-bearing seat, 4-sliding bearing, 5-first gear, 6-first bearing, 7-first spacer, 8-second gear, 9-second bearing, 10-third spacer, 11-second spacer, 12-gland and 13-chuck connecting disc.

Detailed Description

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

As shown in fig. 1, a spindle modification structure of a horizontal lathe comprises a spindle 1 and a spindle box 2, a sliding bearing 4 is arranged between the spindle 1 and the front end of the spindle box 2, a first gear 5 is mounted on the front side shaft diameter of the spindle 1, a first bearing 6 is arranged between the spindle 1 and a bearing seat 3 in the spindle box 2, a first spacer 7 for pressing the inner ring of the first bearing 6 is fixedly arranged on the spindle 1, a second gear 8 abutting against the front side shaft diameter is arranged on the middle shaft diameter of the spindle 1, a second bearing 9 is arranged between the rear end of the spindle box 2 and the middle shaft diameter of the spindle 1, the second bearing 9 and the second gear 8 are separated by a third spacer 10 arranged on the middle shaft diameter, a second spacer 11 for pressing the inner ring of the second bearing 9 is further arranged on the middle shaft diameter, a gland 12 fixed on the second spacer 11 at the rear end of the spindle box 2, the rear end shaft diameter of the main shaft 1 extending out of the rear end of the main shaft box 2 is provided with a chuck connecting disc 13 which is fixed with the rear end shaft diameter and is in interference fit with the rear end shaft diameter, the first bearing 6 and the second bearing 9 are both composed of tapered roller bearings, and the inclined ends of the two bearings correspond to each other.

According to the utility model, the chuck connecting disc 13 is additionally arranged at the rear end of the main shaft 1 of the lathe, the chuck connecting disc 13 is radially connected with the main shaft 1 and is positioned by interference of 0.10mm, and the chuck connecting disc 13 is fixedly connected with the main shaft 1 by using a positioning bolt. The chuck connecting disc 13 is additionally arranged at the rear end of the main shaft 1, so that the three bearings on the main shaft 1 are stressed integrally, and the stability of the pipe during rotation is improved. The original spring compensator of the old numerical control horizontal lathe is removed, the first spacer 7 with the length of 63mm is installed instead, the first spacer 7 is adjusted and positioned by using a lock nut on the original spindle, the bearing clearance is adjusted to be 0.03-0.08, the elastic adjustment is changed into the rigid adjustment, and the axial bearing capacity of the first bearing 6 is enhanced. The first bearing 6 and the second bearing 9 both adopt tapered roller bearings, the tapered roller bearings are used at the rear end of an old numerical control horizontal lathe, the axial bearing capacity of the rear end bearing can be enhanced, and the inclined ends of the two bearings correspond to each other to form a bidirectional thrust positioning structure.

The gland 12 at the rear end of the main shaft 1 is used for compressing the outer ring of the second bearing 9, the outer ring of the second bearing 9 is compressed to deviate towards the front end of the main shaft 1 to drive the inner ring to deviate towards the front end of the main shaft 1, the inner ring of the second bearing 9 further drives the main shaft 1 to deviate forwards, so that the inner ring of the first bearing 6 is compressed when the first spacer 7 fixed on the main shaft 1 through the nut lock deviates forwards, and finally the clearance of the first bearing 6 reaches a standard range. When dealing with axial large thrust alternating impact load, the stability of the main shaft 1 is ensured, and the axial movement and the vibration of the main shaft 1 can be controlled within a reasonable range during working.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The utility model provides a horizontal lathe main shaft reforms transform structure, includes main shaft and headstock, be provided with slide bearing between main shaft and the headstock front end, install first gear, its characterized in that on the front side shaft diameter of main shaft: the spindle is characterized in that a first bearing is arranged between the spindle and a bearing seat in the spindle box, a first spacer bush used for compressing an inner ring of the first bearing is fixedly arranged on the spindle, a second gear abutting against a front side shaft diameter is arranged on a middle shaft diameter of the spindle, a second bearing is arranged between the rear end of the spindle box and the middle shaft diameter of the spindle, the second bearing and the second gear are separated by a third spacer bush arranged on the middle shaft diameter, a second spacer bush used for compressing an inner ring of the second bearing is further arranged on the middle shaft diameter, a gland fixed at the rear end of the spindle box is sleeved on the outer end face of an outer ring of the second bearing, a chuck connecting disc fixed with the shaft diameter of the rear end in interference fit is arranged on the shaft diameter of the rear end of the spindle extending out of the spindle box, the first bearing and the second bearing are both composed of tapered roller bearings, and inclined ends of the two bearings are corresponding to each other.