SU529316A1 - Automatic brake of the normal closed type - Google Patents

Description

one

The invention relates to the field of engineering, in particular hoisting, and can be used in brakes of normally closed type with automatic shutdown.

Known automatic brake normally closed type, comprising a housing with brake discs and linings, squeezing device, made in the form of a ball clutch with drive and driven shafts, driven coupling half and springs.

However, such a brake is characterized by insufficient speed, the presence of attaching the pads to the brake discs, the increased labor intensity of production, and, in addition, it is not reliable enough.

The proposed brake is characterized by the fact that the driven shaft is hollow, and the half-coupling is mounted inside it concentrically with the possibility of axial movement, and the driven shaft is provided with an abutment mounted on its end limiting axial movement

brake discs and linings during release.

In addition, brake discs are made with a non-circular hole, corresponding to the output section of the driven shaft, and brake linings - with a non-circular, for example in the form of a polyhedron, external contour corresponding to the corresponding section of the internal cavity of the housing.

FIG. 1 shows the brake, longitudinal section; in fig. 2 is a section along A-A in FIG. one; in fig. 3 is a section along BB in FIG. one.

The brake has a molded case 1 in which all the parts entering it are placed. The clutch linings 2 contact the inner opening of the case, which is made around the perimeter in the form of a hexagon, the outer contour of which also has the shape of a hexagon. Thus, the friction linings are freely seated in the housing without the possibility of cranking. On radial ball bearings in the housing 1 is fixed driven

shaft 3, at one end of which a gear was cut, and at the end, having a hexagon shape around the perimeter, brake discs 4 were fitted along the running fit, the inner holes of which were also made in the form of a hex. Brake discs are limited in axial movement by retaining ring.

The studs 5 are screwed into the end face of the driven shaft 3. The cap 6, springs 7, plate 8 are screwed onto the ends of the studs, and threaded bushings 9 serving / are wrapped around the axle force of the springs. 1-Th side of the driven shaft 3 is located: 1O with thrust ball bearing 11 mounted on it and the leading coupling half 12, rollers 13, thrust balls 14, driven by the coupling half 15 and guide balls 16.

The leading half-coupling 12 has two flats on the outer diameter, designed to limit the turning of the leading half-coupling relative to the driven shaft, Prog Balancing the leading half-UL 12 In the driven shaft 3 there are round grooves in which rollers 13 are placed to transmit the rotation from the driving shaft. no couplings 12 to the driven shaft 3. The thrust balls 14 are placed on the bevels of the ends of the driving half coupling 12 and the driven coupling half 15. The driven coupling half 15 and the driven shaft 3 have semicircular grooves located at an angle of 12 °. In each slot, two guide balls 16 are placed, which fix the driven coupling half from turning relative to the driven shaft and ensure its axial movement.

The brake works as follows.

When the drive shaft 1O rotates, the drive half coupling 12 fixed on it rotates relative to the driven coupling half 15, which due to the balls 14 and bevels on the half coupling moves 5 axial direction and pushes the cover off from the brake discs. The brake is disengaged. Upon further rotation, the half coupling half rests against the rollers 13 with the flats, transferring the torque to the driven shaft.

When removing the torque from the drive shaft, the lid 6 under the action of the springs 7 presses the disks 4 and the clutch assemblies 2 to each other. This causes the brake to close.

The proposed brake design is simple 1 reliable in operation.

 Brake discs and clutch linings are made by stamping. No riveting or gluing is required to install the clutches. The drive and drive shafts are made of blanks, i, which are calibrated rods of a non-circular profile (hexagon, square, etc., etc.).

During operation, as the clutch linings are worn, the complete disassembly of the brake assembly is not required: it is enough to adjust the tension of the springs 7, and in case of significant wear of the clutch linings, replace them, previously removed, in sleeves 9, plate 8, springs 7 and lid 6,

Tests of the prototype of the described brake showed its high performance and reliability.

The design of the proposed brake can be used in lifting machines, electric actuators and various other devices.

F

isorethorien formula

Claims (1)

1. Auto brake normally closed type, comprising a housing with brake discs and linings, a squeezing device made in the form of a ball clutch with drive and driven shafts, a driven half uhl and springs, characterized in that, in order to improve speed, eliminate the attachment of linings to the discs, reduce the labor intensity and increase reliability the home shaft is hollow the coupling half is installed inside it concentrically with the possibility of axial movement, and the driven shaft is equipped with a stop ring mounted on its end, limiting the axial movement of the brake discs and linings during release. 2, a brake according to claim 1, characterized in that the disks are made with a non-circular hole corresponding to the output section of the driven shaft, and brake linings with a non-circular hole, for example, in the form of a polyhedron, external contour corresponding to the response section of the internal cavity of the housing.