CN213828108U

CN213828108U - Servo transmission device of machine tool

Info

Publication number: CN213828108U
Application number: CN202022293634.4U
Authority: CN
Inventors: 仇真; 居明荣
Original assignee: Taizhou Xiongfeng Machinery Co ltd
Current assignee: Taizhou Xiongfeng Machinery Co ltd
Priority date: 2020-10-14
Filing date: 2020-10-14
Publication date: 2021-07-30
Anticipated expiration: 2030-10-14

Abstract

The utility model relates to a lathe servo transmission, including servo motor, flexible coupling, stiff end bearing frame, ball screw, screw-nut, nut mount pad, support end bearing frame. The utility model discloses in, ball adopts the form that the fixed one end of one end was supported, and the bearing of stiff end bears axial force and radial force simultaneously, and supports the end and only bear radial force to can absorb micro axial floating, ball and servo motor adopt flexible coupling to connect, and flexible coupling can absorb servo motor and the not coaxial deviation of ball installation hole site, can realize high positioning accuracy, quick location and rapid feed.

Description

Servo transmission device of machine tool

Technical Field

The utility model relates to a machine tool equipment technical field, in particular to machine tool servo transmission.

Background

The transmission device of the machine tool is an important component of the machine tool and is an important factor for ensuring the machining precision and stability of the machine tool. The ball screw is used as a key part for transmitting power and positioning of a machine tool and is an important guarantee for the performance of the machine tool, and in the load borne by the ball screw, the axial load and the radial load exist simultaneously, so that the bearings are assembled at the two ends of the ball screw to absorb the axial force and the radial force, but the two ends of the traditional machine tool are fixed in a mode suitable for heavy processing, the thermal deformation of the screw can not be well compensated, the axial floating is caused, and the precision of the machine tool is reduced.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a machine tool servo transmission device has high positioning accuracy, quick location and rapid feed's advantage.

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

a machine tool servo transmission device comprises a servo motor, a flexible coupling, a fixed end bearing seat, a ball screw, a screw nut, a nut mounting seat and a support end bearing seat, wherein the servo motor and the fixed end bearing seat are fixed through seam allowance positioning and threaded connection, one end of the ball screw is rotatably assembled on the fixed end bearing seat and is in transmission connection with the servo motor through the flexible coupling, the ball screw is positioned at the inner end part of the fixed end bearing seat and rotatably sleeved with angular contact ball bearings, the angular contact ball bearings are provided with two groups and are installed in a face-to-face mode, the ball screw is positioned at one side, close to the servo motor, of the angular contact ball bearings and is sequentially assembled with a first bearing retainer ring and a locking nut, one end, far away from the servo motor, of the fixed end bearing seat is fixedly assembled with a bearing end cover, bearing cap with angular contact ball bearing supports the pressure contact, ball keeps away from stiff end bearing frame one end rotary type assembly in support on the end bearing frame, ball is located support end bearing frame tip rotation type has cup jointed deep groove ball bearing, deep groove ball bearing is equipped with two sets ofly and two sets ofly adopt the spacer sleeve to carry out axial positioning between the deep groove ball bearing, ball is located deep groove ball bearing keeps away from servo motor one side be equipped with the second bearing retaining ring and lock nut, screw nut threaded connection in ball is last and be located the stiff end bearing frame with support between the end bearing frame, the nut mount pad with screw nut passes through tang location and screw fixed connection.

Realize above-mentioned technical scheme, ball adopts the form that the fixed one end of one end supported, the bearing of stiff end bears axial force and radial force simultaneously, and support the end and only bear radial force, and can absorb micro axial float, and can reduce or avoid the bending that appears because of ball dead weight, ball and servo motor adopt flexible coupling to connect, flexible coupling can absorb servo motor and the not coaxial deviation of ball installation hole site, can realize high positioning accuracy, quick location and fast feed.

As a preferred scheme of the utility model, first bearing retainer ring and second bearing retainer ring cup joint in on the ball, lock nut with ball threaded connection.

According to the technical scheme, the locking nut tightly fixes the angular contact ball bearing at the fixed end and the deep groove ball bearing at the supporting end and the ball screw, the two angular contact ball bearings at the fixed end can simultaneously bear radial load and axial load, when the outer rings are pressed together, the original gap of the outer rings is eliminated, the preload of the bearings can be increased, and the deep groove ball bearing at the supporting end can well absorb the radial load and partially absorb the axial load.

To sum up, the utility model discloses following beneficial effect has: the ball screw adopts the form that one end is fixed and the other end is supported, the bearing of stiff end bears axial force and radial force simultaneously, and support the end and only bear radial force, and can absorb micro axial float, and can reduce or avoid the bending that appears because of the ball screw dead weight, ball screw and servo motor adopt flexible coupling to connect, flexible coupling can absorb servo motor and the not coaxial deviation of ball screw installation hole site, can realize high positioning accuracy, quick location and fast feed.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

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

The corresponding part names indicated by the numbers and letters in the drawings:

1. a servo motor; 2. fixing a bearing seat; 3. a flexible coupling; 4. locking the nut; 5. a first bearing retainer ring; 6. angular contact ball bearings; 7. a bearing end cap; 8. a nut mounting seat; 9. a lead screw nut; 10. a ball screw; 11. a support end bearing block; 12. a spacer sleeve; 13. a deep groove ball bearing; 14. And a second bearing retainer ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Examples

As shown in FIG. 1, the utility model provides a machine tool servo transmission device, which comprises a servo motor 1, a flexible coupling 3, a fixed end bearing seat 2, a ball screw 10, a screw nut 9, a nut mounting seat 8 and a support end bearing seat 11, wherein the servo motor 1 and the fixed end bearing seat 2 are positioned by a seam allowance and fixed by screw thread, one end of the ball screw 10 is rotatably assembled on the fixed end bearing seat 2 and is in transmission connection with the servo motor by the flexible coupling 3, the ball screw 10 is rotatably sleeved with angular contact ball bearings 6 on the end part of the fixed end bearing seat 2, the angular contact ball bearings 6 are provided with two groups and are installed in a face-to-face manner, the ball screw 10 is positioned on one side of the angular contact ball bearings 6 close to the servo motor 1 and is sequentially assembled with a first bearing retainer ring 5 and a locking nut 4, one end of the fixed end bearing seat 2 far away from the servo motor 1 is fixedly assembled with a bearing end cover 7, bearing end cover 7 supports the pressure contact with angular contact ball bearing 6, ball 10 keeps away from 2 one end rotary type assembly on supporting end bearing frame 11 of fixed end bearing frame, ball 10 is located supporting end bearing frame 11 tip and has cup jointed deep groove ball bearing 13 in the pivoted mode, deep groove ball bearing 13 is equipped with and adopts spacer 12 to carry out axial positioning between two sets of and two sets of deep groove ball bearing 13, ball 10 is located deep groove ball bearing 13 and keeps away from servo motor 1 one side and is equipped with second bearing retaining ring 14 and lock nut 4, screw nut 9 threaded connection just is located between fixed end bearing frame 2 and supporting end bearing frame 11 on ball 10, nut mount pad 8 passes through tang location and screw fixed connection with screw nut 9.

The first bearing retainer ring 5 and the second bearing retainer ring 14 are sleeved on the ball screw 10, the locking nut 4 is in threaded connection with the ball screw 10, the locking nut 4 tightly fixes the angular contact ball bearing 6 at the fixed end and the deep groove ball bearing 13 at the supporting end with the ball screw 10, the two angular contact ball bearings 6 at the fixed end can simultaneously bear radial load and axial load, when the outer rings are pressed together, the original gap of the outer rings is eliminated, the preload of the bearings can be increased, the radial load can be well absorbed by the deep groove ball bearing 13 at the supporting end, and the axial load is partially absorbed.

The embodiment of the utility model provides an in, ball 10 adopts the fixed one end of one end to support the form, the bearing of stiff end bears axial force and radial force simultaneously, and support the end and only bear radial force, and can absorb micro axial floating, and can reduce or avoid the bending that appears because of ball 10 dead weight, ball 10 and servo motor 1 adopt flexible coupling 3 to connect, flexible coupling 3 can absorb servo motor 1 and the not axial deviation of ball 10 installation hole sites, can realize high positioning accuracy, fix a position fast and with fast feed.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A machine tool servo transmission device is characterized by comprising a servo motor, a flexible coupling, a fixed end bearing seat, a ball screw, a screw nut, a nut mounting seat and a support end bearing seat, wherein the servo motor and the fixed end bearing seat are positioned and fixed through a seam allowance and are in threaded connection, one end of the ball screw is rotatably assembled on the fixed end bearing seat and is in transmission connection with the servo motor through the flexible coupling, the ball screw is positioned at the inner end part of the fixed end bearing seat and rotatably sleeved with angular contact ball bearings, the angular contact ball bearings are provided with two groups and are installed in a face-to-face mode, the ball screw is positioned at one side, close to the servo motor, of the angular contact ball bearings and is sequentially assembled with a first bearing retainer ring and a locking nut, one end, far away from the servo motor, of the fixed end bearing seat is fixedly assembled with a bearing end cover, bearing cap with angular contact ball bearing supports the pressure contact, ball keeps away from stiff end bearing frame one end rotary type assembly in support on the end bearing frame, ball is located support end bearing frame tip rotation type has cup jointed deep groove ball bearing, deep groove ball bearing is equipped with two sets ofly and two sets ofly adopt the spacer sleeve to carry out axial positioning between the deep groove ball bearing, ball is located deep groove ball bearing keeps away from servo motor one side be equipped with the second bearing retaining ring and lock nut, screw nut threaded connection in ball is last and be located the stiff end bearing frame with support between the end bearing frame, the nut mount pad with screw nut passes through tang location and screw fixed connection.

2. The servo transmission device of a machine tool according to claim 1, wherein the first and second bearing retainer rings are sleeved on the ball screw, and the lock nut is in threaded connection with the ball screw.