SU616460A1 - Device for securing sleeve-type component on shaft - Google Patents

Description

The invention relates to general engineering and can be used, for example, in precision gear transmissions, in fixing and clamping devices.

A device for fastening a bushing on a shaft is known, which contains a locking screw located in the through-bore of the sleeve and interchangeably with the shaft through an intermediate ball element. A groove is made on the shaft, eccentric about its axis, in which there are two self-braking wedges, the wide ends of which interact with the t-joint,

Such a device is difficult to operate and does not ensure the preservation of the shape of the parts being joined.

It is also known a device for roll-on on a shaft of a part of a sleeve hinge, comprising a screw with multidirectional threads, interacting with thread-sliders installed in a tangential ORverstin fitting in a sleeve, and in contact with self-braking wedges located in a shape similar to a groove applied to a hinge mounted in a shape similar to the shape of a groove applied to a self-braking wedge, placed in a groove similar to the shape, patterned in the same pattern. the surface of the sleeve is eccentric on its axis, on the clamping shaft as the screw rotates in the required direction.

This device is also not without drawbacks noted above. In particular, its dismantling is complicated by the fact that the wedge must be released using special techniques and tools.

A more perfect is a modified version of this device, pre-fabricating two additional holes in the sleeve, parallel to the through-thread hole, located with the sleeve side opposite to the hole and connected to the narrow part of the eccentric groove 2.

However, with ethnm improvement, the device is complex in operation.

The aim of the invention is to simplify the operation of the device and prevent the deformation of the connected parts.

This goal is achieved by the fact that in the proposed device, the wedge is made with a trapezoidal protrusion, which is inserted into a groove of the same shape, which is made in each threaded slider.

Claims (2)

In addition, in the case of a through hole in the sleeve and both threaded sliders of general shape, each of the sliders is made with a longitudinal groove and provided with a guide screw. screwed into the threaded hole provided in the sleeve, and included in the aforementioned longitudinal slot of the threaded slider. FIG. 1 shows the proposed device for fastening a bushing-type part on a shaft, general view; in fig. 2 is given a section along A-A in FIG. one; in fig. 3 and 4 shows a variant of the device design with cylindrical threaded sliders. The sleeve 1 is made with an eccentric groove 2 on its inner surface connected to a through tangential hole 3 (Fig. 2) in which two threaded sliders 4 are installed. The sliders form together with the groove 2 an eccentric cavity in which two self-braking wedges 5 are located, shaped eccentric groove 2. The wedge encompasses shaft 6 through the split ring 7, which serves to prevent the self-braking wedges from falling out of the groove during assembly. There are trapezoidal protrusions 8 on the wedges x, the grooves 9 having the same shape, made in threaded sliders 4. A screw 10 is screwed into both sliders with right and left threads at opposite ends, respectively. In the case of making the through hole 3 and the sliders 4 of a cylindrical shape (Fig. 3, 4), each of the sliders 4 for blocking against rotation is performed with a longitudinal groove 11 and provided with a guide screw 12 screwed into the threaded hole 13 in the sleeve 1. To reduce the dimensions of the device, the threaded hole in each slide must be made eccentric to the axis of the tangential hole of the sleeve and cut through the transverse groove in the thickened part of the slide. The device works as follows. Under the action of a torque applied in the appropriate direction to the locking screw 10, the sliders 4, by their axial displacements in mutually opposite sides, act on the self-braking wedge 5, the displacements of which in the eccentric groove 2 ensure reliable locking of the shaft in the sleeve without changing the mutual arrangement of these two elements. parts When dismounting the device, a torque is applied in the opposite direction to the locking screw 10 and the sliders 4 at mutual axial approaching the right walls of the grooves 9 shift the self-braking wedge 7 into the expanded part of the groove 2, freeing the shaft 6 without damaging the mating surfaces. The described device, in contrast to the known ones, requires less time for assembly and disassembly of the assembly, provides convenience for performing these works by using a single locking screw for them, and also removes restrictions on the accessibility of assembly components. Reducing the time and increasing the ease of installation and disassembly, removing restrictions on the availability of parts allows to expand the scope of application of fasteners of this type, for example, during installation and clamping operations. Tests of prototypes of the device confirmed their efficiency and effectiveness. Claim 1. Device for mounting a sleeve-type part on a shaft, containing a screw with multidirectional threads, interacting with threaded sliders installed in a tangential hole in the sleeve and in contact with self-braking wedges located in a groove of the corresponding shape made on the inside the sleeve surface is eccentric with respect to its axis, characterized in that, in order to simplify the operation of the device and prevent deformation of the connected parts, the wedge has petseidalny protrusion conductive input in the same shaped groove formed in each threaded slider. 2. A device according to claim 1, characterized in that each threaded slider is made with a longitudinal groove and provided with a guide screw screwed into a threaded hole provided in the sleeve and included in said longitudinal groove of the threaded slider. Sources of information taken into account in the examination: 1. USSR author's certificate number 355399, cl. F 16 D 1/08, 1971. 2. Gurabo D. D. Parts and components of devices. M., 1965, p. 528, FIG. 339. A-l .g ten Bb Rygl