Ball nut lead screw pair with auxiliary support

Abstract

The utility model discloses a ball nut lead screw pair with an auxiliary support. The problems that one end of the ball screw is freely suspended, and the ball screw can generate resonance and deflection effects during working are solved. An annular groove is machined in the end of the ball screw, a steel ball is installed in the annular groove, and the installed steel ball makes contact with the inner wall of the ball nut sleeve. When the ball screw rotates and the ball nut does linear motion, the steel balls in the annular groove make contact with the inner wall of the sleeve of the ball nut to do rolling motion, the ball screw is supported, swing of the ball screw is reduced, and the utilization rate of products is increased.

Description

Technical Field

[0001] The utility model belongs to the field of ball screw pairs, and in particular relates to a ball nut screw pair with auxiliary support. Background Art

[0002] In the traditional sleeve nut type ball screw pair, the tail end of the ball screw is suspended in the air during use. When the sleeve nut runs linearly, the ball screw rotates, which is prone to resonance and yaw effects, resulting in reduced overall operating efficiency and poor smoothness of the ball screw pair. The solution is to limit the maximum operating speed of the ball screw pair and reduce the maximum load capacity of the ball screw pair. The effective utilization rate of the ball screw pair is reduced. In daily design, the size of the ball screw pair needs to be increased to meet the needs of the sleeve, which increases the overall sleeve size and increases the weight. Utility Model Content

[0003] In order to solve the problem of resonance and yaw effect generated by the ball screw when the ball screw pair is working, the utility model provides a ball nut screw pair with auxiliary support, which has the characteristics of simple structure, safety and reliability, uniform force on the ball nut, stable operation of the ball screw, long service life of the ball nut, and convenient processing and installation.

[0004] The technical solution of the utility model is a ball nut screw pair with auxiliary support, including a ball screw and a ball nut, characterized in that an annular groove is processed at the end of the ball screw, a steel ball is installed in the annular groove, and the installed steel ball contacts the inner wall of the ball nut sleeve. When the ball screw rotates, the ball nut makes a linear motion, the steel ball rolls in the annular groove, and at the same time, the steel ball contacts and rolls with the inner wall of the ball nut sleeve, and the rolling motion of the steel ball plus the relative linear motion of the ball nut jointly support the ball screw, reducing the swing of the ball screw.

[0005] The utility model has the following beneficial effects:

[0006] Because the supporting steel balls are supported by rolling friction contact with the ball screw and the inner wall of the ball nut sleeve, they have little wear, the ball screw pair runs smoothly, has high efficiency, long service life, and is easy to process and install. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a schematic diagram of the ball screw pair of the utility model;

[0008] Figure 2 This is a schematic diagram of the annular groove of the ball screw of the utility model;

[0009] Figure 3 This is a schematic diagram of the annular groove at the end of the ball screw of the utility model;

[0010] Explanation of the accompanying drawings: 1- ball screw; 2- ball nut; 3- steel ball; 4- inner wall of ball nut sleeve; 5- annular groove. DETAILED DESCRIPTION

[0011] The utility model designs a steel ball supporting method for a sleeve nut type ball screw pair.

[0012] like Figure 1 to Figure 3 As shown, a ball nut screw pair with auxiliary support includes a ball screw 1, a ball nut 2, and a steel ball 3. The ball screw 1 and the ball nut 2 are installed together, an annular groove 5 is processed at the end of the ball screw 1, and the steel ball 3 is installed in the annular groove 5. The installed steel ball 3 contacts the inner wall 4 of the ball nut sleeve.

[0013] When the ball nut sleeve 4 performs linear motion, the steel ball 3 rotates.

[0014] When the ball screw 1 rotates and the ball nut 2 makes a linear motion, the steel ball 3 in the annular groove at the rear end of the screw is supported on the inner wall 4 of the ball nut sleeve, contacts the inner wall of the ball nut sleeve and rolls with the ball screw 1. The rolling motion of the steel ball 3 plus the relative linear motion of the ball nut 2 jointly support the ball screw 1, so that the ball screw 1 is supported by two points instead of a single point, thereby improving the bending and seismic resistance of the ball screw 1 itself, reducing the resonance and deflection effect of the ball screw 1, and improving the effective utilization rate of the ball screw pair. The steel ball 3 forms rolling friction with the ball screw 1 and the inner wall of the ball nut sleeve, with a small friction coefficient and a long service life.

[0015] The utility model is mainly applied to a sleeve nut type ball screw pair; the ball screw rotates and the ball nut performs linear motion.

Claims

1. A ball nut screw pair with auxiliary support, comprising a ball screw (1) and a ball nut (2), characterized in that An annular groove (5) is machined at the end of the ball screw (1), a steel ball (3) is installed in the annular groove, and the installed steel ball (3) contacts the inner wall (4) of the ball nut sleeve; when the ball screw (1) rotates, the ball nut (2) makes a linear motion, the steel ball (3) rolls in the annular groove (5), and at the same time, the steel ball (3) contacts and rolls with the inner wall (4) of the ball nut sleeve, and the rolling motion of the steel ball (3) plus the relative linear motion of the ball nut (2) together play a supporting role for the ball screw (1), thereby reducing the swing of the ball screw (1).

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