Radially preloaded ball screw

Abstract

The utility model discloses radial pre -tightening's screw rod nut, including fixed base, the middle part of fixed base top is equipped with the installation groove, the inside fixed mounting of installation groove has screw rod nut main part, and screw rod nut main part includes mounting seat and screw rod main part, and the top of mounting seat is fixedly connected with the bottom of screw rod main part, and the middle part of screw rod main part is equipped with axial opening, and the surface of screw rod main part is equipped with a plurality of nut grooves, the utility model discloses radial pre -tightening's screw rod nut, this screw rod nut, self -lubricating, maintenance -free, make nut diameter shrink through axial opening and pre -tightening O type ring, eliminate radial clearance, avoid appearing unstable motion track phenomenon of screw rod nut in the movement process, improve the accuracy of screw rod nut positioning, through setting fixed hole and fixed base, this screw rod nut is fixed in use through three -point formula fixed hole, replace traditional fixed mode, improved the stability of screw rod nut installation fixed.

Description

Technical Field

[0001] This utility model relates to the field of lead screw and nut technology, specifically to radially preloaded lead screw and nut. Background Technology

[0002] The core function of a lead screw nut is to convert rotary motion into linear motion or vice versa, and to bear loads to achieve precision transmission. Its functions cover multiple fields such as mechanical fastening, motion control, and force adjustment. It is a core transmission component in CNC machine tools, automated equipment, precision instruments and other fields. Through the meshing of the thread and the lead screw, the rotary motion of the lead screw is converted into the linear motion or vice versa of the nut to achieve precise positioning.

[0003] However, traditional lead screw nuts have the following disadvantages:

[0004] Traditional lead screw nuts have radial clearance, which causes the lead screw nut to have an unstable movement trajectory during operation, affecting the accuracy of positioning. Utility Model Content

[0005] The purpose of this invention is to provide a radially preloaded lead screw nut to solve the problem mentioned in the background art that traditional lead screw nuts have radial clearance, which causes the lead screw nut to have an unstable motion trajectory during operation and affects the accuracy of positioning.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a radially preloaded lead screw nut, comprising a fixed base, wherein a mounting groove is provided in the middle of the top end of the fixed base, and a lead screw nut body is fixedly installed inside the mounting groove; the lead screw nut body includes a mounting seat and a lead screw body, wherein the top end of the mounting seat is fixedly connected to the bottom end of the lead screw body, an axial opening is provided in the middle of the lead screw body, and a plurality of nut grooves are provided on the surface of the lead screw body, wherein an O-ring is fitted inside each of the plurality of nut grooves.

[0007] Preferably, a positioning post is fixedly installed at the bottom of the mounting base, the outer diameter of the positioning post being equal to the inner diameter of the mounting groove, and the main body of the screw nut is installed in the mounting groove through the positioning post.

[0008] Preferably, the top of the fixed base has three fixing holes arranged in a triangle. When the user rotates the screw, the thread on the surface of the screw matches the thread on the inner wall of the fixing hole, so the screw rotates and translates relative to the fixing hole to complete the fixing of the fixed base.

[0009] Preferably, all of the O-rings are made of rubber material, and the O-rings provide a shrink seal to the nut groove.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] 1. This lead screw nut is self-lubricating and maintenance-free. The axial opening and pre-tightened O-ring cause the nut diameter to shrink, eliminating radial clearance and preventing unstable movement trajectory of the lead screw nut during operation, thus improving the positioning accuracy of the lead screw nut.

[0012] 2. By setting fixing holes and fixing base, the screw nut is fixed at the point of use through three-point fixing holes, which replaces the traditional fixing method and improves the stability of the screw nut installation. Attached Figure Description

[0013] Figure 1 This is a perspective view of the present utility model;

[0014] Figure 2 This is a bottom view of the present invention;

[0015] Figure 3 This is a side view of the present invention;

[0016] Figure 4 This is a top view of the present invention.

[0017] In the diagram: 1. Fixed base; 2. Fixed hole; 3. Lead screw and nut body; 31. Mounting seat; 32. Lead screw body; 33. Axial opening; 34. Nut groove; 35. Positioning pin; 4. Mounting groove; 5. O-ring. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0019] Please see Figure 1-4 This utility model provides a radially preloaded lead screw nut, including a fixed base 1. The fixed base 1 has a mounting groove 4 in the middle of its top end. The lead screw nut body 3 is fixedly installed inside the mounting groove 4. The lead screw nut body 3 includes a mounting seat 31 and a lead screw body 32. The top end of the mounting seat 31 is fixedly connected to the bottom end of the lead screw body 32. The lead screw body 32 has an axial opening 33 in the middle. The surface of the lead screw body 32 has several nut grooves 34. Each of the several nut grooves 34 is fitted with an O-ring 5.

[0020] A positioning post 35 is fixedly installed at the bottom of the mounting base 31. The outer diameter of the positioning post 35 is equal to the inner diameter of the mounting groove 4. The main body 3 of the screw nut is installed in the mounting groove 4 through the positioning post 35.

[0021] The top of the fixed base 1 has three fixing holes 2 arranged in a triangle. When the user rotates the screw, the thread on the surface of the screw matches the thread on the inner wall of the fixing hole 2, so the screw rotates and translates relative to the fixing hole 2 to fix the fixed base 1.

[0022] Several O-rings 5 ​​are made of rubber material, and the O-rings 5 ​​provide a shrink seal to the nut groove 34.

[0023] In this embodiment, when the user rotates the screw, the thread on the screw surface matches the thread on the inner wall of the fixing hole 2, so the screw rotates and translates relative to the fixing hole 2 to fix the fixing base 1, thereby completing the installation and fixing of the lead screw nut. The lead screw nut body 3 is installed in the mounting groove 4 through the positioning pin 35, and the O-ring 5 shrinks and seals the nut groove 34.

[0024] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A radially preloaded lead screw nut, including a fixed base (1), characterized in that: The fixed base (1) has an installation groove (4) in the middle of its top end. The screw nut body (3) is fixedly installed inside the installation groove (4). The screw nut body (3) includes a mounting seat (31) and a screw body (32). The top end of the mounting seat (31) is fixedly connected to the bottom end of the screw body (32). The screw body (32) has an axial opening (33) in the middle. The surface of the screw body (32) has several nut grooves (34). O-rings (5) are fitted inside the several nut grooves (34).

2. The radially preloaded lead screw nut according to claim 1, characterized in that: A positioning post (35) is fixedly installed at the bottom of the mounting base (31), and the outer diameter of the positioning post (35) is equal to the inner diameter of the mounting groove (4).

3. The radially preloaded lead screw nut according to claim 1, characterized in that: The top of the fixed base (1) has three fixing holes (2) arranged in a triangle.

4. The radially preloaded lead screw nut according to claim 1, characterized in that: Several of the O-rings (5) are made of rubber material.

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