CN201420804Y - Spiral reciprocating bearing - Google Patents

Abstract

The utility model discloses a spiral reciprocating bearing comprising an inner ring, an outer ring and a plurality of balls. The utility model is characterized in that at least one spiral groove is respectively arranged on the outer periphery of the inner ring and the inner periphery of the outer ring correspondingly, a plurality of balls are arranged in the spiral grooves of the inner ring and the outer ring, spiral spacing columns are arranged between adjacent two balls in the same spiral groove, and retainer rings are securely arranged on the two ends of the outer ring. The utility model has the advantages of simple structure, low cost, little wear and tear, no dead point phenomenon and long service life.

Description

The reciprocating type bearing of spiral

Technical field

The utility model relates to the reciprocating type bearing of a kind of spiral.

Background technique

Realize the device of reciprocatory motion with axle for pump, valve and some machinery, now Chang Yong structure has ball wire bar pair and trapezoidal screw pair of nut, the ball screw auxiliary structure is relatively complicated, part precision is had relatively high expectations, and difficulty of processing is bigger, and cost is higher, be mainly used on numerical control and the high-end devices, and its inner ball-recirculation moves, and can produce wearing and tearing between them, has shortened life cycle; Shaft type screw mandrel to the not high reciprocatory motion of required precision adopts the trapezoidal screw pair of nut more, the shortcoming of trapezoidal thread is to be between screw mandrel and the nut sliding friction, torque force and frictional force are higher than ball screw far away, to in assembly process because the skew of axle, produce monolateral interlock possibility bigger, the moment of torsion that is produced just can't be eliminated, further increased torque force and frictional force, made that the life cycle of trapezoidal screw pair of nut is shorter.

The model utility content

The purpose of this utility model is the above-mentioned deficiency at prior art, provides a kind of spiral reciprocating type bearing, and it has advantage simple in structure, that cost is lower, wearing and tearing are little, and the dead point phenomenon can not occur, has prolonged life cycle.

For achieving the above object, the reciprocating type bearing of spiral of the present utility model, comprise inner ring, outer ring and several balls, it is characterized in that on the inner circumference of the excircle of inner ring and outer ring, being respectively equipped with one or spiral chute that one or more is corresponding, several balls place the spiral chute of inner ring and outer ring, be provided with the spacer of spiral in the same spiral chute between adjacent two balls, be installed with back-up ring at the two ends of outer ring.

During use, inner ring is connected with axle, fixedly inner ring or outer ring, an axle work rotates forward or backwards, and then outer ring or inner ring are done straight reciprocating motion.

As further improvement of the utility model, described spacer is an open tubular column, and lubricating grease is housed in it; Can be lubricated ball and inside and outside circle.

In sum, the utlity model has advantage simple in structure, that cost is lower, wearing and tearing are little, and the dead point phenomenon can not occur, prolonged life cycle.

Description of drawings

Fig. 1 is the utility model embodiment's a plan view.

Fig. 2 is the utility model embodiment's a circumferential sectional view.

Fig. 3 is the plan view of inner ring.

Fig. 4 is the sectional view of outer ring.

Embodiment

Below in conjunction with accompanying drawing the utility model is described in further detail.

As depicted in figs. 1 and 2, the reciprocating type bearing of this spiral, comprise inner ring 1, outer ring 2 and several balls 3, on the inner circumference of the excircle of inner ring 1 and outer ring 2, be respectively equipped with the spiral chute 6 and 7 (as shown in Figure 3 and Figure 4) of two correspondences, several balls 3 place the spiral chute 6 and 7 of inner ring 1 and outer ring 2, are provided with the spacer 4 of spiral in the same spiral chute between adjacent two balls 3, and described spacer 4 is an open tubular column, lubricating grease is housed in it, and 2 two ends are installed with back-up ring 5 in the outer ring.

During use, inner ring 1 is connected with axle, fixedly inner ring 1 or outer ring 2, axle is done to rotate forward or backwards, and then outer ring 2 or inner ring 1 are done straight reciprocating motion, are specially adapted to the working condition of reciprocal distance weak point; Compare with ball wire bar pair, have advantage simple in structure, that cost is lower, wearing and tearing are little, ball 3 can move to any direction, the dead point phenomenon can not occur, for rolling friction, does not contact between the ball 3 between each part, and it is little to wear and tear, and has prolonged life cycle.

Claims (2)

1, the reciprocating type bearing of a kind of spiral, comprise inner ring, outer ring and several balls, it is characterized in that on the inner circumference of the excircle of inner ring and outer ring, being respectively equipped with one or spiral chute that one or more is corresponding, several balls place the spiral chute of inner ring and outer ring, be provided with the spacer of spiral in the same spiral chute between adjacent two balls, be installed with back-up ring at the two ends of outer ring.

2, the reciprocating type bearing of spiral as claimed in claim 1 is characterized in that described spacer is an open tubular column, is equipped with lubricating grease in it.

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