阅读说明：本技术 一种机床丝杆尾座定位结构 (Lathe lead screw tailstock location structure ) 是由 赵祖喜 汪晓东 杨亮 张剑沉 吴志超 黄远同 于 2020-05-25 设计创作，主要内容包括：本发明公开了一种机床丝杆尾座定位结构,包括机床本体,所述机床本体的台面两侧分别设置有电机固定座和丝杆尾座,所述机床本体上沿水平方向设置有滚珠丝杆,所述滚珠丝杆的两端分别安装在电机固定座和丝杆尾座的安装孔内,所述机床本体的台面上设置有对丝杆尾座固定的定位机构,该定位机构包括圆柱销和半圆形销,所述机床本体的台面上沿竖直方向开设有供圆柱销架设的圆柱销安装孔,所述圆柱销的底部安装在机床本体的圆柱销安装孔内,所述圆柱销的L型支撑面竖直侧面上沿横向开设有供半圆形销连接的C型连接孔,所述半圆形销安装在C型连接孔内,本发明结构合理,定位效果显著,性能永久,且易于制造装配,适合广泛应用。(The invention discloses a machine tool screw rod tailstock positioning structure which comprises a machine tool body, wherein a motor fixing seat and a screw rod tailstock are respectively arranged on two sides of a table top of the machine tool body, a ball screw is arranged on the machine tool body along the horizontal direction, two ends of the ball screw are respectively installed in installation holes of the motor fixing seat and the screw rod tailstock, a positioning mechanism for fixing the screw rod tailstock is arranged on the table top of the machine tool body, the positioning mechanism comprises a cylindrical pin and a semicircular pin, a cylindrical pin installation hole for erecting the cylindrical pin is formed in the table top of the machine tool body along the vertical direction, the bottom of the cylindrical pin is installed in the cylindrical pin installation hole of the machine tool body, a C-shaped connection hole for connecting the semicircular pin is formed in the vertical side surface of an L-shaped supporting surface of the cylindrical pin along the transverse direction, and the semicircular pin is installed in the C-shaped connection hole.)

1. The utility model provides a lathe lead screw tailstock location structure which characterized in that: the machine tool comprises a machine tool body (1), wherein a motor fixing seat (2) and a screw rod tailstock (7) are respectively arranged on two sides of a table top of the machine tool body (1), a ball screw (3) is arranged on the machine tool body (1) along the horizontal direction, and two ends of the ball screw (3) are respectively installed in installation holes of the motor fixing seat (2) and the screw rod tailstock (7);

the positioning mechanism is characterized in that a positioning mechanism for fixing the screw rod tailstock (7) is arranged on the table top of the machine tool body (1), the positioning mechanism comprises a cylindrical pin (5) and a semicircular pin (6), a cylindrical pin mounting hole (4) for erecting the cylindrical pin (5) is formed in the table top of the machine tool body (1) along the vertical direction, the cylindrical pin (5) is a deformation body taking a cylinder as a parent body, the bottom of the cylindrical pin (5) is mounted in the cylindrical pin mounting hole (4) of the machine tool body (1), a plane parallel to an axis is vertically cut on one side of the top of the cylindrical pin (5) along the vertical direction, a plane perpendicular to the axis is transversely cut on the side of the cylindrical pin (5) along the horizontal direction, namely, an L-type supporting surface (501) is formed on one side of the top of the cylindrical pin (5) through the vertical cutting of the cylindrical pin (5) in the vertical direction and the transverse cutting of the horizontal direction, a C-type connecting hole (502) for connecting the semicircular pin (6) is formed in the vertical side of the L-type supporting surface (501) of the cylindrical pin (5), and the semicircular pin (502).

2. The machine tool screw tailstock positioning structure according to claim 1, characterized in that one side of the semicircular pin (6) is vertically tangent with a fixing surface (601) parallel to the axis along the vertical direction, the semicircular pin (6) is abutted against the left side surface of the screw tailstock (7), and the semicircular pin (6) is axially rotatable in the C-shaped connecting hole (502) of the cylindrical pin (5).

3. The machine tool screw tailstock positioning structure according to claim 1, characterized in that the horizontal plane of the L-type supporting surface (501) of the cylindrical pin (5) is abutted against the middle position of the bottom surface of the screw tailstock (7), and the cylindrical pin (5) is axially rotatable in the cylindrical pin mounting hole (4) of the machine tool body (1).

4. The machine tool screw rod tailstock positioning structure according to claim 1, wherein the bottom surface of the screw rod tailstock (7) is a horizontally arranged flat plate (701), the flat plate (701) and the screw rod tailstock (7) are fixed structures, a plurality of threaded through holes (702) are symmetrically formed in two sides of the flat plate (701), and the screw rod tailstock (7) is fixed on the table top of the machine tool body (1) through the threaded through holes in the flat plate (701) through locking screws.

5. The machine tool screw tailstock positioning structure according to claim 1, characterized in that the ball screw (3) comprises a screw and a ball nut, the ball nut is connected to the screw through screw threads.

6. The machine tool screw tailstock positioning structure according to claim 1, wherein the motor fixing seat (2) is horizontally provided with a mounting hole for the ball screw (3), and one end of the ball screw (3) is rotatably mounted on a rotating bearing in the mounting hole of the motor fixing seat (2).

7. The positioning structure of the screw tailstock of the machine tool according to claim 1, wherein the screw tailstock (7) is horizontally provided with a mounting hole for the ball screw (3), and the other end of the ball screw (3) is rotatably connected to a rotating bearing in the mounting hole of the screw tailstock (7).

Technical Field

The invention belongs to the technical field of machine tool parts, and particularly relates to a machine tool screw rod tailstock positioning structure.

Background

When a screw rod is installed and prestretched in a traditional machine tool, the screw rod is mostly fixed by a fixing screw of a screw rod tailstock, or a cylindrical positioning pin is installed at the front end of the screw rod tailstock to axially position the screw rod tailstock.

As patent application number (201620979369.9) discloses a lathe lead screw seat mounting structure, including installing lead screw and the axle sleeve in the mount pad, from the mount pad preceding terminal surface join in marriage the horizontal circular cone pinhole of hinge to axle sleeve and mount pad both sides fitting surface middle section, install the taper pin in the taper pin hole, the central line in taper pin hole transversely passes through the fitting surface of axle sleeve and mount pad, through the position of taper pin locking axle sleeve and mount pad, can be applicable to lathe lead screw installation needs well, improve production efficiency.

The patent application number (201520183287.6) discloses a simple-structure protection structure designed for protecting a screw rod and preventing the screw rod from being locked, and the tailstock screw rod protection structure comprises two spring supporting seats, wherein springs are arranged on the two spring supporting seats, the screw rod is arranged on a tailstock, and a sliding block is arranged on the screw rod. This structure is through the mode that increases spring support seat at the lead screw both ends and install the spring on spring support seat, avoids the slider to remove to tailstock front end locking lead screw when moving too fast to and the slider removes to the terminal striking tailstock locking lead screw of tailstock, and produces and strike and destroy the lead screw, has all realized protecting the lead screw, but the lead screw tailstock still exists following not enoughly in the in-service use process:

as shown in fig. 6, the positioning of the screw rod tailstock 7 by the conventional design in the prior art uses a cylindrical positioning pin 8. The cylindrical positioning pin 8 is in line contact with the screw rod tailstock 7. When the screw rod tailstock 7 deflects in the left-right direction, the cylindrical positioning pin 8 can keep in line contact with the screw rod tailstock 7; when the screw rod tailstock 7 deflects in the vertical direction, the original line contact between the cylindrical positioning pin 8 and the screw rod tailstock 7 is changed into point contact, so that the positioning effect of the cylindrical positioning pin 8 on the screw rod tailstock 7 is unstable.

The design method is that the screw rod tailstock and the cylindrical positioning pin are in tangential line contact, if the machine tool screw rod is subjected to error deviation after being pre-stretched, the screw rod tailstock and the cylindrical positioning pin are changed into unstable point contact from original line contact, the screw rod tailstock cannot be effectively positioned, the pre-stretching of the screw rod is influenced, and further the machining precision and the machining stability of the machine tool are influenced.

Disclosure of Invention

The invention aims to provide a machine tool screw rod tailstock positioning structure, which aims to effectively position a screw rod tailstock during the pre-stretching of screw rod assembly and improve the precision so as to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides a lathe lead screw tailstock location structure which characterized in that: the machine tool comprises a machine tool body, wherein a motor fixing seat and a screw rod tailstock are respectively arranged on two sides of a table top of the machine tool body, a ball screw is arranged on the machine tool body along the horizontal direction, and two ends of the ball screw are respectively arranged in mounting holes of the motor fixing seat and the screw rod tailstock;

the positioning mechanism comprises a cylindrical pin and a semicircular pin, a cylindrical pin mounting hole for erecting the cylindrical pin is formed in the table top of the machine tool body in the vertical direction, the cylindrical pin is a deformation body with a cylinder as a matrix, the bottom of the cylindrical pin is mounted in the cylindrical pin mounting hole of the machine tool body, a plane parallel to the axis is vertically cut in one side of the top of the cylindrical pin in the vertical direction, a plane vertical to the axis is transversely cut in the side of the cylindrical pin in the horizontal direction, namely, an L-type supporting surface is formed in one side of the top of the cylindrical pin through vertical cutting of the cylindrical pin in the vertical direction and transverse cutting of the cylindrical pin in the horizontal direction, a C-type connecting hole for connecting the semicircular pin is transversely formed in the vertical side of the L-type supporting surface of the cylindrical pin, and the semicircular pin is mounted in the C-type connecting hole.

As a further scheme of the invention: one side of the semicircular pin is vertically cut with a fixing surface parallel to the axis along the vertical direction, the semicircular pin is abutted against the left side surface of the screw rod tailstock, and the semicircular pin can axially rotate in a C-shaped connecting hole of the cylindrical pin.

According to a further aspect of the present invention, a horizontal plane of the L-type support surface of the cylindrical pin abuts against a middle position of the bottom surface of the screw rod tailstock, and the cylindrical pin is axially rotatable in a cylindrical pin mounting hole of the machine tool body.

As a still further scheme of the invention: the bottom surface of the screw rod tailstock is a flat plate which is horizontally arranged, the flat plate and the screw rod tailstock are of a fixed structure, a plurality of threaded through holes are symmetrically formed in the two sides of the flat plate, and the screw rod tailstock is fixed on the table top of the machine tool body through the threaded through holes in the flat plate through locking screws.

As a still further scheme of the invention: the ball screw comprises a screw rod and a ball nut, and the ball nut is connected to the screw rod through threads.

As a still further scheme of the invention: and a ball screw mounting hole is formed in the motor fixing seat along the horizontal direction, and one end of the ball screw is rotatably mounted on a rotating bearing in the motor fixing seat mounting hole.

As a still further scheme of the invention: and the ball screw tail seat is provided with a ball screw mounting hole along the horizontal direction, and the other end of the ball screw is rotatably connected to a rotating bearing in the screw tail seat mounting hole.

Compared with the prior art, the invention has the beneficial effects that: when the machine tool screw is assembled and pre-stretched, the motor end of the ball screw is firstly fixed on the motor fixing seat, the screw tail seat generates an axial movement trend under the axial tension of the ball screw, and is limited by the screw tail seat positioning structure on the machine tool body to prevent the axial movement, because the screw tail seat positioning structure is in surface contact with the screw tail seat, in the screw tail seat positioning structure, the cylindrical pin can transversely rotate in the positioning pin mounting hole, and the semicircular pin can longitudinally rotate in the C-shaped connecting hole of the cylindrical pin, no matter the ball screw is pre-stretched, the screw tail seat positioning structure can be in surface contact with the screw tail seat to stably limit the axial movement of the screw tail seat, the invention has simple structure, long performance and no failure, and is easy to produce and manufacture, is suitable for wide application.

Drawings

In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.

Fig. 1 is a schematic structural view of a machine tool body in a machine tool screw rod tailstock positioning structure.

Fig. 2 is a schematic structural diagram of a screw rod tailstock in a positioning structure of the screw rod tailstock of a machine tool.

Fig. 3 is a schematic structural view of a cylindrical pin and a semicircular pin in a positioning structure of a screw rod tailstock of a machine tool.

Fig. 4 is a schematic structural view of a cylindrical pin in a positioning structure of a screw rod tailstock of a machine tool.

Fig. 5 is a schematic structural view of a semicircular pin in a positioning structure of a screw rod tailstock of a machine tool.

Fig. 6 is a schematic diagram of a conventional design application in the prior art.

In the figure, a machine tool body 1, a motor fixing seat 2, a ball screw 3, a cylindrical pin mounting hole 4, a cylindrical pin 5, an L-shaped supporting surface 501, a C-shaped connecting hole 502, a semicircular pin 6, a fixing surface 601, a screw rod tailstock 7, a flat plate 701 and a threaded through hole 702 are arranged.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 5, in an embodiment of the present invention, a machine tool screw tailstock positioning structure includes a machine tool body 1, a motor fixing seat 2 and a screw tailstock 7 are respectively disposed on two sides of a table top of the machine tool body 1, a ball screw 3 is disposed on the machine tool body 1 along a horizontal direction, two ends of the ball screw 3 are respectively mounted in mounting holes of the motor fixing seat 2 and the screw tailstock 7, the motor end of the ball screw 3 is fixed by the motor fixing seat 2, the ball screw 3 is rotated on the machine tool body 1 by a driving action of the motor fixing seat 2, the ball screw 3 is more stably erected on the machine tool body 1 by the screw tailstock 7, and even if the ball screw 3 moves more stably during assembling and pre-stretching.

The table top of the machine tool body 1 is provided with a positioning mechanism for fixing the screw rod tailstock 7, the connection of the screw rod tailstock 7 on the machine tool body 1 is more stable through the positioning mechanism, namely, the ball screw 3 is transversely or longitudinally deviated in the pre-stretching process, and the positioning structure of the screw rod tailstock 7 can be in surface contact with the screw rod tailstock 7 to stably limit the axial movement of the screw rod tailstock 7.

Referring to fig. 3, the positioning mechanism includes a cylindrical pin 5 and a semicircular pin 6, a cylindrical pin mounting hole 4 for the cylindrical pin 5 to be erected is formed in the table top of the machine tool body 1 along the vertical direction, the bottom of the cylindrical pin 5 is mounted in the cylindrical pin mounting hole 4 of the machine tool body 1, so that the cylindrical pin 5 can rotate along the axis of the cylindrical pin in the cylindrical pin mounting hole 4, specifically, when the ball screw 3 is pre-stretched, the screw is stressed, the screw tail 7 seat is also stressed by forces in different directions of up-down turning and left-right yawing, when the screw tail seat 7 is stressed by the left-right yawing force, the cylindrical pin 5 in the positioning structure of the screw tail seat 7 correspondingly rotates left and right, when the screw tail seat 7 is stressed by the up-down turning force, the semicircular pin 5 in the positioning structure of the screw tail seat 7 correspondingly rotates up and down, so that the plane of the semicircular pin 5 is always kept in surface contact with the screw tail seat 7, the stability of 7 location of screw rod tailstock has greatly been guaranteed, the tensile volume of assurance lead screw to improve the precision.

Referring to fig. 4, the cylindrical pin 4 is a deformable body taking a cylinder as a parent body, and the cylindrical pin 5 is improved under the condition that the cylindrical pin mounting hole 4 on the traditional machine tool body 1 is not changed, so that the cylindrical pin 5 is conveniently mounted on the machine tool body 1, and the assembly difficulty of an operator on the cylindrical pin 4 on the machine tool body 1 is reduced;

a plane parallel to the axis is vertically cut on one side of the top of the cylindrical pin 5 along the vertical direction, a plane perpendicular to the axis is transversely cut on the side of the cylindrical pin 5 along the horizontal direction, that is, a L-type supporting surface 501 is formed on one side of the top of the cylindrical pin 5 through the vertical cutting of the cylindrical pin 5 in the vertical direction and the transverse cutting of the cylindrical pin 5 in the horizontal direction, a C-type connecting hole 502 for connecting the semicircular pin 6 is transversely formed on the vertical side of the L-type supporting surface 501 of the cylindrical pin 5, the semicircular pin 6 is installed in the C-type connecting hole 502, that is, the semicircular pin 6 is rotatably connected in the C-type connecting hole 502 of the L-type supporting surface 501 on the cylindrical pin 5, so that the semicircular pin 6 rotates in the C-type connecting hole 502 of the cylindrical pin 5 along the axis direction, and further, when the screw rod tailstock 7 is acted by the vertical turning force, the semicircular pin 6 in the positioning structure of the screw rod tailstock 7 correspondingly rotates up and down, so that the plane of the semicircular pin 6 is always.

Referring to fig. 5, a fixing surface 601 parallel to the axis is vertically cut on one side of the semicircular pin 6 along the vertical direction, and the semicircular pin 6 abuts against the left side surface of the screw rod tailstock 7, so that the fixing surface 601 always abuts against the side surface of the screw rod tailstock 7.

The semicircular pin 6 is axially rotatable within the C-shaped coupling hole 502 of the cylindrical pin 5, while facilitating replacement of the semicircular pin 6.

The horizontal plane of the L-shaped support surface 501 of the cylinder pin 5 abuts against the middle position of the bottom surface of the screw tailstock 7, and the L-shaped support surface 501 of the cylinder pin 5 contacts with the holding surface of the screw tailstock 7.

The cylindrical pin 5 can axially rotate in the cylindrical pin mounting hole 4 of the machine tool body 1, so that the service life of the cylindrical pin 5 is prolonged, and the cylindrical pin 5 can be conveniently replaced.

The bottom surface of the screw rod tailstock 7 is a flat plate 701 horizontally arranged, the flat plate 701 and the screw rod tailstock 7 are of a fixed structure, a plurality of threaded through holes 702 are symmetrically formed in two sides of the flat plate 701, the screw rod tailstock 7 is fixed on the table top of the machine tool body 1 through the threaded through holes in the flat plate 701 through locking screws, the screw rod tailstock 7 is more firmly fixed on the machine tool body 1 through the locking screws, and meanwhile, the screw rod tailstock 7 is detachably connected with the machine tool body 1 through the fixing effect of the locking screws, so that the screw rod tailstock 7 is convenient to replace and maintain, the screw rod tailstock 7 is periodically maintained, and the service life of the screw rod tailstock 7 is prolonged.

The ball screw 3 comprises a screw rod and a ball nut, and the ball nut is connected to the screw rod through threads.

The utility model discloses a motor fixing base 2, including motor fixing base 2, motor fixing base 2 is last to have seted up along the horizontal direction and to have supplied ball screw 3 mounting hole, ball screw 3's one end is rotated and is installed on the rolling bearing in motor fixing base 2 mounting hole, and through setting up rolling bearing, it is more stable to make ball screw 3 rotate on motor fixing base 2, has reduced ball screw 3 and motor and has fixed the frictional force at 2 rotation in-processes, has improved ball screw 3's use ageing.

The ball screw tailstock 7 is provided with a mounting hole for the ball screw 3 along the horizontal direction, the other end of the ball screw 3 is rotatably connected to a rotating bearing in the mounting hole of the ball screw tailstock 7, and the ball screw 3 is more stably rotated on the ball screw tailstock 7 by arranging the rotating bearing, so that the friction force of the ball screw 3 and the ball screw tailstock 7 in the rotating process is reduced, and the use aging of the ball screw 3 is further improved.

The working principle is as follows: when the machine tool screw is assembled and pre-stretched, the motor end of the ball screw 3 is firstly fixed on the motor fixing seat 2, the screw tail seat 7 generates an axial movement trend by the axial tension of the ball screw 3, and is limited by the positioning structure of the screw tail seat 7 on the machine tool body 1 to prevent the axial movement, because the positioning structure of the screw tail seat 7 is in surface contact with the screw tail seat 7, in the positioning structure of the screw rod tailstock 7, the cylindrical pin 5 can transversely rotate in the positioning pin mounting hole 4, the semicircular pin 6 can longitudinally rotate in the C-shaped connecting hole 502 of the cylindrical pin 5, therefore, no matter the ball screw 3 is transversely or longitudinally deviated in the pre-stretching process, the positioning structure of the screw rod tailstock 7 can keep surface contact with the screw rod tailstock 7, and the axial movement of the screw rod tailstock 7 is stably limited.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.