CN210770083U - ATC ball groove cam mechanism - Google Patents

Abstract

The utility model relates to an ATC ball slot cam mechanism, including space mutually perpendicular's ball capstan head and ball cam, ball cam and ball capstan head transmission cooperation, the ball cam outer peripheral face has the axial helicla flute, ball capstan head front end outer peripheral face circumference equipartition has the semicircle ball groove, be equipped with in the semicircle ball groove with the big ball of axial helicla flute roll complex, semicircle ball inslot surface set up the arc slot of splayed, the arc slot internal arrangement has little ball, big ball and little ball roll cooperation and drive the ball capstan head and be indexing motion. The utility model discloses an arc slot of splayed is seted up at hemisphere inslot surface, and arranges little ball at the arc slot for little ball rolls along arc slot circulation when the atress, like this under the prerequisite that keeps positioning accuracy, has prevented effectively that little ball from being extruded the emergence of hemisphere groove phenomenon by big ball, ensures transmission stability and continuity.

Description

ATC ball groove cam mechanism

Technical Field

The utility model relates to an ATC ball slot cam mechanism.

Background

The ATC is mainly used for replacing the cutter in an automatic machining center. In the tool changing process, the tool arm positioning is changed from the traditional single-rod bearing transmission mechanism into the mode of rolling fit of the large ball and the axial spiral groove, so that the spherical surface is in rolling contact with the ball cam in a smooth transition mode at the corner of the ball cam, the small balls are arranged on the surface of the semicircular groove of the ball rotating tower in an arc mode, and the large ball and the small balls are in rolling fit to drive the ball rotating tower to perform indexing motion. Although the structure improves the transmission stability and the positioning precision, when in actual use, the phenomenon that the small ball is extruded out of the semicircular groove by the large ball often occurs, and transmission errors are caused.

Disclosure of Invention

The to-be-solved technical problem of the utility model is: in order to overcome the defects in the prior art, the utility model provides a transmission is reliable and stable and can prevent that little ball from being extruded ATC ball slot cam mechanism.

The utility model provides a technical scheme that its technical problem adopted is: the utility model provides an ATC ball groove cam mechanism, includes space mutually perpendicular's ball capstan head and ball cam, ball cam and ball capstan head transmission cooperation, ball cam outer peripheral face have an axial helicla flute, ball capstan head front end outer peripheral face circumference equipartition has a semicircle groove, be equipped with in the semicircle groove with the big ball of axial helicla flute roll fit, semicircle inslot surface seted up the arc slot of splayed, the arc inslot is arranged there is little ball, big ball and little ball roll fit and drive the ball capstan head and do indexing motion.

Further, a retainer is fixed in the ball turret surrounding the semicircular ball groove through a countersunk head screw, and the large ball is installed in the retainer.

The utility model has the advantages that: the utility model discloses an arc slot of splayed is seted up at hemisphere inslot surface, and arranges little ball at the arc slot for little ball rolls along arc slot circulation when the atress, like this under the prerequisite that keeps positioning accuracy, has prevented effectively that little ball from being extruded the emergence of hemisphere groove phenomenon by big ball, ensures transmission stability and continuity.

Drawings

The present invention will be further described with reference to the accompanying drawings and embodiments.

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic diagram of the right-side structure of fig. 1.

Fig. 3 is an enlarged schematic structural view of the arc-shaped groove of the present invention.

In the figure: 1. the ball turret comprises a ball turret, 2 ball cams, 3 axial spiral grooves, 4 semicircular ball grooves, 5 large balls, 6 arc grooves, 7 small balls and 8 retainers.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.

An ATC ball groove cam mechanism as shown in fig. 1-3 is applied to ATC tool changing positioning. The cam mechanism comprises a ball turret 1 and a ball cam 2 which are mutually vertical in space, the ball cam 2 is in transmission fit with the ball turret 1, an axial spiral groove 3 is formed in the outer peripheral surface of the ball cam 2, semi-spherical grooves 4 are uniformly distributed in the circumferential direction of the outer peripheral surface of the front end of the ball turret 1, a retainer 8 is fixed on the ball turret 1 surrounding the semi-spherical grooves 4 through countersunk screws, and a large ball 5 in rolling fit with the axial spiral groove 3 is installed in the retainer 8.

The inner surface of the semicircular groove 4 is provided with a splayed arc groove 6, small balls 7 are arranged in the arc groove 6, and the large balls 5 and the small balls 7 are matched in a rolling manner to transmit power so as to drive the ball turret 1 to perform indexing motion.

Power is transmitted by the ball cam 2, and the ball turret 1 is driven to perform indexing motion through the rolling fit of the large ball 5 along the axial spiral groove 3 and the rolling fit of the large ball 5 and the small ball 7, so that the cutter arm is positioned in the cutter changing process.

The utility model discloses an arc slot 6 of splayed is seted up at 4 internal surfaces of semicircle ball groove, and arrange little ball 7 in arc slot 6, make little ball 7 roll along arc slot 6 circulation when the atress, distance pre-compaction before using between accessible ball cam 2 and ball capstan tower 1, make both not have back clearance, like this under the prerequisite that keeps positioning accuracy, can prevent effectively that little ball 7 from being extruded the emergence of 4 phenomena in semicircle ball groove by big ball 5, ensure driven stability and continuity.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims (2)

1. The utility model provides an ATC ball groove cam mechanism, includes space mutually perpendicular's ball capstan head (1) and ball cam (2), ball cam (2) and ball capstan head (1) transmission cooperation, and ball cam (2) outer peripheral face has axial helicla flute (3), and ball capstan head (1) front end outer peripheral face circumference equipartition has semicircle groove (4), is equipped with in semicircle groove (4) with axial helicla flute (3) roll complex big ball (5), characterized by: the inner surface of the semicircular groove (4) is provided with a splayed arc groove (6), small balls (7) are arranged in the arc groove (6), and the large balls (5) are matched with the small balls (7) in a rolling manner to drive the ball turret (1) to perform indexing motion.

2. The ATC ball groove cam mechanism of claim 1, wherein: a retainer (8) is fixed on the ball turret (1) surrounding the semicircular ball groove (4) through a countersunk head screw, and the large ball (5) is installed in the retainer (8).

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