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Rotating-type linear motion device for screw nut

A linear motion and rotary technology, applied in the direction of transmission, belt/chain/gear, mechanical equipment, etc., can solve the problem of ball passages being filled with balls

Active Publication Date: 2015-11-25
TBI MOTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is to say, the complete ball channel P cannot be filled with balls 13 by using this method

Method used

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  • Rotating-type linear motion device for screw nut
  • Rotating-type linear motion device for screw nut
  • Rotating-type linear motion device for screw nut

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0080] A rotary nut linear motion device according to a preferred embodiment of the present invention will be described below with reference to related drawings, wherein the same elements will be described with the same reference symbols.

[0081] Figure 2A It is a schematic diagram of a rotary nut linear motion device according to an embodiment of the present invention, Figure 2B for Figure 2A An exploded schematic diagram of the rotary nut linear motion device shown, Figure 2C for Figure 2A The schematic cross-sectional view of the rotary nut linear motion device shown on the section line A-A, Figure 2D for Figure 2C An enlarged schematic view of the region B shown, Figure 2E for Figure 2D The schematic diagram of the change of the inner sleeve of the bushing and the outer nut during the temperature change process is shown.

[0082] First, please also refer to Figure 2A and Figure 2B As shown, in this embodiment, the rotary nut linear motion device 2 take...

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PUM

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Abstract

The invention discloses a rotating-type linear motion device for a screw nut. The rotating-type linear motion device comprises an inner shaft bushing, the outer screw nut, a ball retainer and first balls. A first outer ball groove is arranged in the surface of the outer side of the inner shaft bushing and provided with an outer ball contact portion. A lead angle is arranged between the outer ball contact portion and the surface of the outer side of the inner shaft bushing. The inner shaft bushing is sleeved with the outer screw nut. An inner ball structure is arranged on the surface of the inner side of the outer screw nut. The inner ball structure is provided with a first inner ball groove, a turning portion and an extending portion. The two ends of the turning portion are connected with the first inner ball groove and the extending portion. A first ball channel is formed by the first inner ball groove and the first outer ball groove. The inner shaft bushing is sleeved with the ball retainer which is provided with a fixed holding portion. The first balls are contained in the fixed holding portion and the first ball channel. The radial distance between the extending portion and the surface of the outer side of the inner shaft bushing is not smaller than the diameter of the maximum section of the first balls. According to the rotating-type linear motion device for the screw nut, the number of the balls in the ball channel can be increased, and then the bearing capacity is improved.

Description

technical field [0001] The invention relates to a rotary nut linear motion device. Background technique [0002] Rotary nut linear motion device is a device widely used in many mechanical equipment, such as: rotary nut ball screw device or rotary nut ball spline device, the main purpose of both settings is to provide precision The transmission function, through the rotary motion and linear motion in the mechanical operation, and then make the loaded machine or object move in the linear direction. [0003] figure 1 It is a radial sectional view of an existing rotary nut linear motion device, and the rotary nut linear motion device 1 can be applied to a rotary ball screw device. The rotary nut ball screw device at least includes a screw (not shown), a bushing inner sleeve 11 , an outer nut 12 and a plurality of balls 13 . The existing bushing inner sleeve 11 has an outer ball groove 111 on its outer side, which can form a ball channel P together with the inner ball groove 1...

Claims

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Application Information

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IPC IPC(8): F16H25/22
CPCF16H25/22
Inventor 李进胜杨进财
Owner TBI MOTION TECH CO LTD
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