RU1821567C - Device for fastening workpieces - Google Patents

Abstract

Usage: in instrumentation. SUMMARY OF THE INVENTION: The locking cams are fixed to the base part with three screws. Two screws are located symmetrically relative to a conical-head screw and on the same radius as the latter, which reduces the dimensions of the device and, as a result, the material consumption. 3 ill.

Description

The invention relates to mechanical engineering and instrumentation and can be used to adjust and unilaterally fix two parts between themselves without their relative movement, including when smooth lateral micromotion is required.

The purpose of the invention is to reduce material consumption by reducing the size.

Fig. 1 shows a general view of a device for fixing parts, section BB of Fig. 2; figure 2 is a view along arrow a in figure 1; in Fig.Z - section bb in Fig.2.

The device comprises a locking element made in the form of a cam 1 with an axial hole 2, with an end conical sharpening 3, with two additional axial holes 4, located symmetrically to the hole 2 and at the same radius R with them, with an end cone 5.

The cam 1 is installed in the radial groove 6 with the supporting end 7 of the base part 8 opposite the internal conical selection

9. made in the joining part

10. Moreover, the part 10 (taking into account the requirements for the product) is thin-walled and airtight, i.e.

does not allow any lateral (radial) holes, grooves, etc.

Parts 8 and 10 (taking into account the requirements for the product) have an exact relative position, which is determined, for example, by the parallelism of planes 11 and 12, the symmetry and alignment of the parts 8 and 10 along the joint axis.

The device also contains a screw 13 with a conical head abutting against the end conical sharpening 3 of the cam 1, as well as two additional screws 14, for example, with a cylindrical head, mounted in additional axial holes 4 for rigidly fixing the cam 1 relative to parts 8 and 10 The internal conical sample 9 can be made in the part 10, both from two sides with respect to the part 8, and from one side. The number of samples 9 on each side and, accordingly, of the radial grooves 6 is determined by the design of the products, as well as by mechanical stresses (overloads) on this product. The sample 9 is made, for example, by a cutter 0D at an angle a. . With the same dimensions 0C and a, cam 1 is made. Moreover, the end face 15 is internal conical

ate with

oo

Nj 01

51

a sample 9 is structurally located on the connection axis above the supporting end 7 of the radial groove 6 to force the cam 1 to abut while balancing parts 8 and 10, both along the connection axis and perpendicular to this axis. For this purpose, an end cone 5 is made in cam 1 at an angle / (defined structurally).

To eliminate the angular mutual rotation of the parts 8 and 10 in the cam 1, the outer diameter 0D is made with an angle as in the sample 9 due to forced contact around the circumference of the cam 1 with the surface 0C of the sample 9.

Such a clearance-free radial fixation of parts 8 and 10 by the cams 1 ensures their rigid (along and perpendicular to the axis of the connection) fixation to each other with one-way access for three fixations.

Sample 9 has a conical profile with an angle of a of 25 ° to provide self-braking of part 8 relative to cam 1.

The operation of the device.

Part 8 is connected to part 10, taking into account their relative position in the product, which is determined, for example, by the mutual arrangement of planes 11 and 12. Then, the cams 1 are installed in the radial grooves 6 on the screws 13 and 14, without turning them all the way. Next, screw 13 is screwed as far as it will go, while the conical head of this screw abuts against the conical sharpening 3, pressing (moving) the cam 1 into the sample 9.

This movement of the cam 1 slides along the end face 15 of the sample 9 and further, and ends with the cam 1 resting on the surface 16 of the sample 9.

With such a double contact arrangement of the cam 1 inside the conical selection 9, it is as if the part 10 is jammed relative to the part 8. Moreover, a wedge-shaped gap 17 is formed between the cam 1 and the end face 7 of the radial groove 6. This gap 17 is ensured constructively by providing for the excess of the end 7 made in the part 10 over the end 7 of the radial groove b made in the part 8.

After jamming, the cam 1 is additionally secured with two additional screws 14, for example, with a cylindrical head.

tfj

The circumferential contact of the cam 1 eliminates the possibility of an angular rotation between the parts 8 and 10, since the cam 1 and the surface 16 have the same

the diameter is 0D.

The locking device for parts 8 and 10 allows assembly with one-way locking. 8 the moment of movement of the cam 1 with screws 13 adjust the alignment

parts 8 and 10 along the joint axis and their angular rotation to ensure parallel planes 12 and 11.

If necessary, disassembly, remove the screws 13 and 14 and remove the cam 1.

The invention allows to reduce the outer diameter of the base part 8, which reduces the outer diameter of the connected part 10 and, as a result, reduces the material consumption of the product as a whole.

Claims (1)

Formula of Bre Genius A device for fixing parts, containing equally spaced locking elements in the form of cams with the main and additional holes, end conical sharpening and end conical surfaces, the cams are installed in the radial grooves of the base part with the abutment of the indicated surfaces on the end face of the inner conical selection of the joined part, which is axially offset relative to the plane of the ends of the radial grooves, the outer diameter of the cams and the angle taper generatrix the cams are equal to the diameter and the angle of inclination of the generatrix of the internal conical selection of the joining part, while screws with conical surfaces of the heads are installed in the main holes of the cams contacting with the end conical sharpening of the corresponding cam, and additional screws are installed in the additional holes, characterized in that, in order to reduce the material consumption by reducing the dimensions, it is equipped with a second set of additional screws installed in the holes made in the cams, each screw with conical head located between additional screws on the same radius with the last and at the same distance from them. 1Z eleven Editor Fig.Z FIG. g Compiled by A. Stepanov Tehred M. Morgenthal Corrector M. Keretsman FIG. Bllb