SU1349911A1 - Mechanism of spindle helical movement of gear-shaping machine - Google Patents

Abstract

The invention relates to the field of machine-tool construction and will find application in gear-dividing machines designed for machining helical gears. The purpose of the iso trophic iron tandal and abdominal pain is to improve accuracy by reducing the number of kinematic links. The proposed mechanism includes a housing made in two parts and fixed on the worm wheel 3 of the separation gear from the chain of the gear shaping machine. There are two disks 5 and 6 in each of the parts of the body, which have rectilinear grooves 9 in which stones are placed. The disks are mounted coaxially with each other on the finger 14, rigidly fixed in the clamp 7 of the hammer 8. The finger connects the spindle with the disks by means of spherical supports and stones placed in the slots of the disks. The discs are installed with the possibility of rotation around the axis O | -Oi, which is perpendicular to the axis Oz-Oz of rotation of the spindle. 3 il. 5 lf 6 (L

Description

The invention relates to the field of machine tools, in particular to gear-shaping machines designed for machining helical gears.

The purpose of the invention is to improve the processing accuracy by reducing the number of kinematic links.

FIG. 1 shows the internal mechanism, common yid; in fig. 2 shows section A-A in FIG. one; in fig. 3 shows the layout of the disks.

A screw mechanism for a gear-shaping machine designed for cutting helical gears includes a body made of two parts 1 and 2. With the help of screws and pins (not indicated), body parts are placed on the worm wheel 3 of the worm-gear division (from a chain of the gear-shaping machine ). The mechanism has a one-way screw to 4, which has a variable thickness of a coil and is made similarly to a screw (not shown) designed to engage the worm with wheel 3. In each of the parts of the body there are coaxially mounted disks 5 and 6, with the axis of rotation of the disks perpendicular to the axis rotation of the spindle 7 of the cylinder 8. The disks are made perpendicular to the axis of rotation of their straight grooves 9. in which stones 10 are installed, fixed in the grooves by the bars 11. The disks themselves are fixed in the housing with the help of sleeves. Spherical bearings 12 (hinges) are installed in stones x 10, the axial movement of which is limited by retaining rings 13. Spindle 7 on which is mounted to 8, is connected by pins 12 with a finger 14. The latter is rigidly fixed in the spindle with a pin 15. The disks are placed on the finger 14 is opposed to the spindle 7. A worm to 4 interacts with a worm wheel, which is made on disk 6 and has 180 teeth. Worm to 4 has a variable coil thickness and ends with a tetrahedron. A guide bushing 16 is installed on it. A compensator 17 is provided for selecting the gap in the screw pair. On the screw 4 the limb 18 is fixed, having 120 divisions and allowing to read the disc rotation angle with an accuracy of 1 having 60 divisions and allowing to increase the counting accuracy to 1. The turn of the jibs is fixed with the help of crackers 20, which are pressed by four screws 21 and fixed by nuts 22. Cylindrical holes in the housing and a disk are provided for fixing the corners of the screw lines O, 15 and 23 And the locking pin 23.

The screw mechanism works as follows.

The grooves 9 of the disks 5 and 6 are initially located on the axes x oo, i.e. the angle of elevation

helix equals 0 ° (). The spindle 7 is set to a middle position, with the finger 14 rising onto the axis Oi-Oi, coinciding with the axis of rotation of the disks 5 and 6.

In this position, the disks can freely rotate around the axis Oi-Oi and respectively around the finger 14.

Due to the divider screw 4, the disk 6 is precisely turned at an angle p and the axis O-O is turned to the position Od-Oa. Next comes the spindle 7 with the finger 14 in reciprocating motion. The right half of the finger 14 is in the slot of the disk 6 located at an angle p. When moving the spindle, finger 14 copies the direction

5 groove in the disk 6 and transfers it to the groove of the disk 5. The latter automatically turns at an angle p around the axis Oj-Oi, since the disk 5 can rotate freely as a result of the left end of the finger. After that, the disk 5 is fixed.

0 The axis O | -Oi of rotation of the disks perpendicular to the axis Oz-Oz of rotation of the shpindl. When performing a reciprocating movement, the spindle 7 receives a helical motion due to balanced moments acting on the finger 14 from the side of the disks 5 and 6.

The rotation angle is calculated along the limb 18 and the vernier 19. If the helix angle is standard, the fixation can be performed by installing the pin 23. The disc can be reversed to produce both right-handed and left-handed helical teeth of the gears. After installing the disk to the desired angle of the helix using crackers 20 it

5 is fixed.

Claims (1)

Invention Formula 0 The mechanism of the screw movement of the spindle of the gear-shaping machine, including a separating worm gear mounted on the housing, and associated with the reciprocating mechanism of the spindle spindle disk mounted with the possibility of rotation around the axis, perpend5 spherical axis of rotation of the spindle, and bearing mounted The straight groove has a stone with a finger, characterized in that, in order to improve accuracy, the mechanism is provided with a second identically made first disk with a stone mounted coaxially on said finger. the first and the opposite spindle, the disks being placed in the housing with the possibility of rotation together with the worm gear, and the finger being rigidly fixed on the center pin and connected to the stones by means of inserted two hinged supports FIG. one 22 Aa gz Yu Compiled by V. Slitkova Editor L. ZaitsevaTehred I. VeresKorrektorM. Sharoshi Order 4946/11 Circulation 970 Subscription VNIIPI USSR State Committee for Inventions and Discoveries 113035, Moscow, Zh-35, Raushsk nab. 4/5 Production and printing company, Uzhgorod, ul. Project, 4