CN218746428U

CN218746428U - Lead screw double nut adjusting type pre-stretching bearing seat

Info

Publication number: CN218746428U
Application number: CN202223217122.5U
Authority: CN
Inventors: 张凯凯
Original assignee: Taizhou Gaoguang Cnc Machine Tool Manufacturing Co ltd
Current assignee: Taizhou Gaoguang Cnc Machine Tool Manufacturing Co ltd
Priority date: 2022-12-02
Filing date: 2022-12-02
Publication date: 2023-03-28
Anticipated expiration: 2032-12-02

Abstract

The utility model provides a lead screw double nut regulation formula prestretches bearing frame belongs to xx technical field. The utility model provides a bearing frame is prestretched to lead screw double nut regulation formula, includes the bearing housing shell of suit on ball, its characterized in that: ball from left to right divide into lead screw end, smooth end and screw thread end in proper order, bearing housing shell suit is served at ball last lead screw, be equipped with in the bearing housing shell and keep off the ring, keep off and be equipped with first bearing on the ring, still be equipped with the second bearing in the bearing housing shell, first bearing with the second bearing butt is in the same place, the utility model discloses a setting of the screw thread of different pitches on interior butt piece and the ball can make and rotate the purpose that interior butt piece reaches in the quick travel, need not to rotate longer time, then can carry out the micro-adjustment rotating outer nut, and the screw thread on the interior butt piece is denser in addition, and the dynamics of using when rotatory outer nut is less, can carry out the accurate regulation of decimal value moreover.

Description

Formula of lead screw double nut prestretches bearing frame

Technical Field

The utility model belongs to the lathe field especially relates to a lead screw double nut regulation formula prestretches bearing frame.

Background

Because the ball screw can expand due to friction heat after long-time operation, the thread pitch is increased, and the operation and positioning accuracy is affected. Therefore, when the ball screw is applied to occasions with high positioning accuracy requirements, the thermal expansion coefficient is usually compensated, and the pre-stretching is a relatively common compensation mode for the thermal expansion of the screw rod when the screw rod is installed.

A bearing frame for lead screw prestretching like patent number CN208681088U is including dismantling the bearing frame body and the bearing steel bushing of connection, all be equipped with the locating hole that supplies the lead screw to pass through on bearing frame body and the bearing steel bushing, be equipped with first step on the lateral wall of bearing steel bushing, be equipped with the second step on the inside wall of bearing steel bushing, be equipped with on the inside wall of bearing frame body with first step complex third step, horizontal mounting hole has been seted up on the first step, set up the installation mating holes who transversely aligns with the mounting hole on the bearing frame body is close to the terminal surface of bearing steel bushing.

However, when the nut is installed, the nut needs to be rotated for a long time to perform stretching operation, and the thread pitch is large, so that the force is large, and small-value precise operation cannot be performed.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to prior art's not enough, provide a lead screw double nut regulation formula prestretches the bearing frame.

The utility model discloses a realize above-mentioned purpose, provide following technical scheme, a bearing frame is prestretched to lead screw double nut regulation formula, including the bearing housing shell of suit on ball, its characterized in that: the ball screw is divided into a screw end, a smooth end and a threaded end from left to right in sequence, the bearing seat shell is sleeved on the ball screw, the threaded end is arranged on the ball screw, a retaining ring is arranged in the bearing seat shell, a first bearing is arranged on the retaining ring, a second bearing is further arranged in the bearing seat shell, the first bearing is abutted to the second bearing, an inner abutting block is connected to the threaded end of the ball screw through threads, and an outer abutting block is connected to the inner abutting block through threads.

Optionally, the baffle ring, the first bearing and the second bearing are located at a smooth end of the ball screw, and the radius of the inner wall of the baffle ring is smaller than the radius of the ball screw end.

Optionally, one side of the inner abutting block, which is far away from the bearing seat shell, is fixedly connected with an inner nut, the other end of the inner abutting block abuts against an inner ring of the second bearing, and threads are arranged on the peripheral side of the inner abutting block.

Optionally, the pitch between the threads on the inner abutment blocks is smaller than the pitch of the threaded end of the ball screw.

Optionally, outer butt joint piece with interior butt joint piece threaded connection, outer butt joint piece is kept away from a side end face of bearing housing shell has linked firmly outer nut, the other end butt of outer butt joint piece is in the outer lane of second bearing, outer butt joint piece with the bearing housing shell is sliding connection.

To sum up, compared with the prior art, the utility model has the following beneficial effects:

1. through the setting of the screw thread of different pitches on interior butt piece and the ball, can make and rotate the purpose that interior nut reached butt piece in the quick travel, need not to rotate longer time, then can carry out the micro-adjustment rotating outer nut, the screw thread on the butt piece is denser in addition, and the dynamics of using when rotatory outer nut is less, can carry out the accurate regulation of decimal value moreover.

Drawings

Fig. 1 is a perspective view of the present invention.

Fig. 2 is a front view of the present invention.

Fig. 3 isbase:Sub>A cross-sectional view taken along the linebase:Sub>A-base:Sub>A of fig. 2 according to the present invention.

10. A bearing housing shell; 11. a ball screw; 12. an inner nut; 13. an outer nut; 14. a baffle ring; 15. a first bearing; 16. a second bearing; 17. an outer abutment block; 18. an inner abutment block.

Detailed Description

In order to make the technical field personnel understand the utility model discloses the scheme, will combine the drawing in the embodiment of the utility model below, to the technical scheme in the embodiment of the utility model carries out clear, complete description.

As shown in the figure 1-3, a prestretching bearing seat of screw double nut regulation formula includes bearing seat shell 10 of suit on ball 11, its characterized in that: the ball screw 11 is sequentially divided into a screw end, a smooth end and a threaded end from left to right, a bearing seat shell 10 is sleeved on the screw end of the ball screw 11, a baffle ring 14 is arranged in the bearing seat shell 10, a first bearing 15 is arranged on the baffle ring 14, a second bearing 16 is also arranged in the bearing seat shell 10, the first bearing 15 and the second bearing 16 are abutted together, the baffle ring 14, the first bearing 15 and the second bearing 16 are positioned at the smooth end of the ball screw 11, the radius of the inner wall of the baffle ring 14 is smaller than that of the screw end of the ball screw 11, an inner abutting block 18 is in threaded connection with the threaded end of the ball screw 11, an outer abutting block 17 is in threaded connection with the inner abutting block 18, an inner nut 12 is fixedly connected to one side of the inner abutting block 18, which is far away from the bearing seat shell 10, and the other end of the inner abutting block 18 is abutted to the inner ring of the second bearing 16, the outer periphery side of the inner abutting block 18 is provided with threads, the thread pitch between the threads on the inner abutting block 18 is smaller than the thread pitch of the thread end of the ball screw 11, the outer abutting block 17 is in threaded connection with the inner abutting block 18, the outer nut 13 is fixedly connected to the end face, far away from the bearing seat shell 10, of one side of the outer abutting block 17, the other end of the outer abutting block 17 abuts against the outer ring of the second bearing 16, the outer abutting block 17 is in sliding connection with the bearing seat shell 10, the purpose of rapidly moving the inner abutting block 18 by rotating the inner nut 12 can be achieved through the arrangement of the threads with different thread pitches on the inner abutting block 18 and the ball screw 11, long rotation time is not needed, then fine adjustment can be carried out by rotating the outer nut 13, the threads on the inner abutting block 18 are dense, force used when the outer nut 13 is rotated is small, and small-number precise adjustment can be carried out.

When the bearing seat is used, the ball screw 11 is arranged on the bearing seat, the bearing seat shell 10 is fixed at the screw end of the ball screw 11, the baffle ring 14 is abutted against the screw end of the ball screw 11, then the inner nut 12 is rotated, the inner nut 12 drives the outer nut 13 to enable the inner abutting block 18 to be quickly abutted against the second bearing 16, after the inner abutting block is abutted against the second bearing 16, the outer abutting block 17 is slowly abutted against the outer ring of the second bearing 16 by rotating the outer nut 13, then the outer abutting block is acted on the screw end of the ball screw 11 through the first bearing 15 and the baffle ring 14, and then the ball screw is prestretched under the pulling of reactive force.

It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.

Claims

1. The utility model provides a prestretching bearing frame is adjusted to lead screw double nut, includes bearing housing shell (10) of suit on ball (11), its characterized in that: ball (11) from left to right divide into lead screw end, smooth end and screw thread end in proper order, the screw is served on ball (11) is adorned to bearing housing shell (10) suit, be equipped with in bearing housing shell (10) and keep off ring (14), be equipped with first bearing (15) on keeping off ring (14), still be equipped with second bearing (16) in bearing housing shell (10), first bearing (15) with second bearing (16) butt is in the same place the threaded connection has interior butt piece (18) on the screw thread end of ball (11), threaded connection has outer butt piece (17) on interior butt piece (18).

2. The screw double nut adjustable pre-tensioning bearing block as claimed in claim 1, wherein: the baffle ring (14), the first bearing (15) and the second bearing (16) are located at the smooth end of the ball screw (11), and the radius of the inner wall of the baffle ring (14) is smaller than that of the screw end of the ball screw (11).

3. The screw double nut adjustable pre-tensioning bearing block as claimed in claim 1, wherein: an inner nut (12) is fixedly connected to one side, away from the bearing seat shell (10), of the inner abutting block (18), the other end of the inner abutting block (18) abuts against an inner ring of the second bearing (16), and threads are arranged on the outer peripheral side of the inner abutting block (18).

4. The screw double nut adjustable pre-tensioning bearing block as claimed in claim 3, wherein: the pitch between the threads on the inner abutment blocks (18) is smaller than the pitch of the threaded end of the ball screw (11).

5. The screw double nut adjustable pre-tensioning bearing block as claimed in claim 1, wherein: outer butt piece (17) with interior butt piece (18) threaded connection, keep away from outer butt piece (17) one side terminal surface of bearing housing shell (10) has linked firmly outer nut (13), the other end butt of outer butt piece (17) is in the outer lane of second bearing (16), outer butt piece (17) with bearing housing shell (10) are sliding connection.