SU1530852A1 - Ball-type rolling-contact guideway - Google Patents

Abstract

The invention relates to mechanical engineering and can be used in machine tools, industrial robots and bearing assemblies. The purpose of the invention is to enhance the functionality of the ball rolling guide by providing linear and rotational movements. The cylindrical body 1, on the inner surface of which the protrusions and grooves are evenly distributed around the circumference, has a separator 2 in which there are closed circulation channels 12 with longitudinal 13 and transition sections filled with balls 3. The number of projections of the body 1 is one more than the number of compasses 12. The distance between the longitudinal rows of balls 3 of one circulation channel 12 is smaller than the width of the slots and greater than the width of the protrusions. This condition ensures a seizure guide and allows alternately operating one row of balls 3 in each circulation channel 12, then the other, both axially and rotationally moving the shaft 11. For a more uniform loading of balls 3 in the support, separator 2 is made two-section and with a cylindrical annular boring in the central part of the housing 1. The channels 12 of one section are shifted relative to the circulation channels 12 of the other section by half of their circumferential pitch. 1 hp f-ly, 8 ill.

Description

The invention relates to mechanical engineering and can be used in metal-cutting machines, industrial robots and other devices as a support for linear translational and rotational displacement.

The aim of the invention is to enhance the functionality of the ball rolling guide due to the provision of linear and rotational movements.

FIG. 1 shows a ball rolling guide; in fig. 2 is a sectional view in FIG. one; in fig. 3 is a view B in FIG. one; in fig. 4 - section of the separator with balls, sweep; in fig. 5 is a diagram of the most unfavorable loading of the support, side view; in fig. 6 shows a section in FIG. 5; in fig. 7 - section GGD in fig. five; in fig. 8 plot of a two-section separator, scan.

The ball guide consists of a housing 1 and a separator 2 with balls 3. On the inner surface of the housing 1, longitudinal projections 4 are made, evenly spaced around the circumference of the housing and separated by grooves 5. On the inner surface of the housing

1, annular recesses 6 and 7 are provided.

A through groove 8 is provided in the housing, which is internally closed by a ring 9, which is fixed by means of a spacer ring 10 installed in the housing 1.

The separator 2 is located between the housing 1 and the shaft 11. In the separator

2, closed circulation channels 12 for accommodating balls 3 are made. Each circulation channel 2 consists of two identical longitudinal sections 13, separated by a strip 14, which are connected at the ends by transition sections 15 of a semicircular shape. The slats 14 are connected to the separator 2 by means of two wedge-shaped protrusions 16 made along the edges of the channel 12. The axial position of the separator

2 is carried out on the end surfaces which abut respectively against the protrusion 17 of the housing 1 and the spacer ring 10. A through groove 8 is intended to successively fill the circulation channels 12 with balls 3 during assembly.

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Sharikov roller guide works as follows.

During the forward movement of the shaft 11, the loaded balls, which are in contact with the shaft 11 and the projections 4 of the housing 1, move along the longitudinal part of the groove in the same direction. Motion from loaded balls is transmitted to non-loaded balls that move along the other longitudinal part of the groove and along transition sections 15. This causes the balls 3 to move along closed circulation channels 12. When the shaft 11 rotates, the loaded balls 18 move in the same direction and they carry away the separator 2 with unloaded balls. When one of the rows of loaded balls descends from the protrusion 4 into the longitudinal groove 5, the separator 2 continues to rotate under the action of other loaded balls and the row of balls located in the other longitudinal section of the same groove turns onto the protrusion 4. So the row of balls Roles change: unloaded balls become loaded until they, in turn, go into the longitudinal groove 5.

In order to prevent the protrusions 4 of all the loaded balls from being simultaneously removed from the projections, the number of closed circulation channels with balls in the separator is one more than the number of projections 4 of the housing. Then the change of loaded balls in the guide occurs sequentially. At the same time, it is impossible to allow both rows of balls of one circulation channel to be in contact with the protrusion 4 and the shaft 11 at some time, since in this case the balls are wedged during translational movement of the shaft: of this, it is necessary to have the width of the protrusion 4 less, and the width of the groove 5 is longer than the distance between the longitudinal rows of balls located in the longitudinal sections of one channel. For the beam, when the width of the protrusion B and the width of the longitudinal groove Bj differ from the size A by the same value, it can be written that B, A - b; + b.

Another variant of the ball guide (Fig. 4J rolling provides a more even distribution of 0

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loads on the balls; in the body of the additional popnepone, the annular boring 18, and the two-section separator 19 is restrained from axial movement by the rings 20 and 21, fixed by the spacer rings 22 and 23 in the body. 25 another section half of their circumference (Fig. 7).

If there is a circulation channel with unloaded rollers in front of the projection section (Fig. 5), in the other section there are two rows of loaded balls (Fig. 6) on the same outlet. Thus, on each of the protrusions at any moment There are at least two rows of loaded balls. This ensures a more reliable operation of the ball guide.

The use of the proposed ball rolling guide allows for linear translational and rotational movement, which expands its functionality.

Claims (2)

Invention Formula .one. A ball rolling guide comprising a cylindrical body with evenly spaced on the inner surface longitudinal grooves and protrusions and a separator mounted therein with closed circulation channels with longitudinal and transitional sections filled with balls, in order to expand the functionality by providing linear and rotational motion; the separator is rotatably mounted in the housing; the number of closed circulation channels is one more than the number n each housing channel is connected with the distance between the longitudinal sections, the greater width of the groove and the smaller width of the protrusion. 2. Guiding according to claim 1, characterized in that, in order to increase reliability by more uniform loading of the balls, the separator is filled with two sections, and the circulation channels of one section are offset relative to the circulation channels of the other skid by half of the circumferential pitch. 114 tout 2 73 x vidb FIG. 2 v ////////////////////// x  f f and j. Uh FI.5 75 1 IS rj / / / / Schug.f. f9 IB R FIG. five YY Phie, 7