SU948617A1

SU948617A1 - Rotary table

Info

Publication number: SU948617A1
Application number: SU813245423A
Authority: SU
Inventors: Павел Григорьевич Макаров; Семен Наумович Шафир; Вячеслав Федорович Бойко
Original assignee: Одесское специальное конструкторское бюро специальных станков
Priority date: 1981-02-09
Filing date: 1981-02-09
Publication date: 1982-08-07

Description

Изобретение относитс к области станкостроени и может быть использовано в делительных механизмах.The invention relates to the field of machine tools and can be used in dividing mechanisms.

Известны поворотные столы с механизмом индексации планшайбы, состо щим из соосно расположенных трех цилиндрических зубчатых колес, одно из которых жестко св зано с основанием , другое - с планшайбой, а третье - с т гами и установлено с возможностью осевого перемещени и одновременного зацеплени с первыми двум 13 ,Rotary tables with a faceplate indexing mechanism are known, consisting of coaxially arranged three spur gears, one of which is rigidly connected to the base, the other to the faceplate, and the third to pull and installed with the possibility of axial movement and simultaneous engagement with the first two 13 ,

Недостатком известных столов вл етс сложность конструкции,A disadvantage of the known tables is the complexity of the design,

Цель изобретени - упрощение конструкции и повышение точности,The purpose of the invention is to simplify the design and improve accuracy,

Дл этого стол снабжен упором, установленным на торце зубчатого колеса, св занного с т гами, со смещением относительно оси и с возможностью контактировани с ведомым элементом привода поворота или с торцом цилиндрического зубчатого колеса , жестко св занного с основанием.For this, the table is provided with a stop mounted at the end of the gear connected to the rods, offset from the axis and in contact with the driven element of the rotation drive or with the end of the cylindrical gear rigidly connected to the base.

На фиг,1 изображен стол, разрез;. на фиг.2 - стол с изображением сил, действующих при сцеплении зубчатых колес.Fig, 1 shows a table, a section; figure 2 is a table with the image of the forces acting in the coupling gears.

Поворотна планшайба 1 стола жестко св зана с ведомым элементом привода поворота, выполненного в виде черв чного колеса 2 и оси 3. Черв чное колесо 2 направл етс по торцам плоскостью 4 основани 5 и нижней плоскостью направл ющего фланца 6, закрепленного на основании 5. К последнему прикреплены также стакан 7 и гидроцилиндр 8, служащие вместе с тем опорой дл неподвижного зубчатого колеса 9,The turntable faceplate 1 of the table is rigidly connected with the driven element of the turn actuator, made in the form of a worm gear 2 and axle 3. The worm gear 2 is guided along the ends by plane 4 of base 5 and the lower plane of guide flange 6 fixed to base 5. the cup 7 and the hydraulic cylinder 8 are also attached to the latter, which serve together with the support for the stationary gear wheel 9,

Радиальной опорой поворотной планшайбы стола 1 служит подшипник 10 при посредстве оси 3 и стакана 7.The radial bearing of the rotary faceplate of the table 1 is served by the bearing 10 by means of the axis 3 and the glass 7.

На черв чном колесе 2 закреплено зубчатое колесо 11, имеющее те же модуль и число зубьев, что и колесо 9. On the worm wheel 2, a gear wheel 11 is fixed, having the same module and number of teeth as wheel 9.

20 В зацепление с зубчатым колесом 9 введено зубчатое колесо 12 с внутренним зацеплением, подвижное в осевом направлении с возможностью зацеплени с колесом 11 и св занное через сфери25 ческие шайбы 13 с т гами 14, снабженными пружинами 15.20 A gear wheel 12 with internal gearing is introduced into engagement with a gear wheel 9, which is axially movable with the possibility of gearing with wheel 11 and connected through spherical washers 13 with connecting rods 14 fitted with springs 15.

Claims

To disengage the toothed gears 11 and 12, an annular piston 16 is provided, which is located in the gap between the cylinder 30 and the cylinder 7. The gear wheel 12 is equipped with a stop 17 that is offset from the axis of the gear wheels. The location of the stop 17 shows; dot-dash line. An annular hydraulic clamp 18 can be used to clamp the worm gear 2 carrying around the table's gate face 1. The worm gear 2 is filled with a screw 19 connected with a turning drive. Under the action of the springs 15, the gear wheel 12 descends, engages with the wheel 11. The stop 17. resting on the end of the cylindrical scaffold 9 (shown in 11th dash line) stops the forward movement of the wheel 12 and causes it to cross over under the action of the axis P all the springs Ii to the gapless connection of the teeth of the wheels 9 and 11 with the teeth of the wheel 12 occurring in two zones perpendicular to the diametral plane in which there is an emphasis 17. At the same time there is a force shorting of the teeth with a force yshayuschim total spring force 15 as many times as the arm over the shoulder 6 P rj. The resulting radial force Pt senses the bearing 10. For disengaging gears, pressure is applied to piston 16 and podnimaet gear wheel 12 to disengage from wheel 11. After that, the faceplate 1 is rotated through the black gear. In order to use the force of the springs 15 not only for engaging the gear wheels, but also for clamping the rotary faceplate 1, the stop 17 must be installed as shown in the drawing by solid lines, and the sub-holder 10 must be at the level of the fixed gear wheel 9, thanks to this arrangement of the bearing stop 17 10 when coupling gears 11 and 12 with the resultant spring force P–: and the worm gear 2 operates an emphasis 17 with a force P equal to P as a result of the wheel 12 tilting at the tooth of the wheel 11 force P, and the axis 3 connected with rotational th faceplate 1 - the power of the P WG (forming moments, acting clockwise). From the equilibrium conditions Px, 1-, P, 2i Therefore, the moment Prj g / applied11 to the rotary faceplate of the table, can be represented as the moment P 1 or. If you add the force P {from the stop 17) to the left and the force I act towards it The left force will remain, acting down. Symmetrically, it is located on the right of two forces, forming another strong moment as indicated above). Sloeke two forces - located symmetrically to the left and to the right, we obtain the centrally located force P-, used to clamp the rotary plane 1. Thus, the device will allow us to achieve simple structural and technological means of high division accuracy in precision cutting tables. Claims Rotary table with rotary drive and faceplate indexing mechanism, consisting of coaxially arranged three cylindrical gears, one of which is rigidly connected to the base, the other - to the faceplate, and the third - with the rods and installed with the possibility of axial movement and simultaneous zatsegl (2 with the first two, about t and h and h y and with the fact that, in order to simplify the design and posture-precision, the table is equipped with a stop mounted on the end of the gear wheel associated with the rods, offset relative to the axis and with the possibility of contacting with the driven element of the rotational drive or with the end face of a cylindrical gear wheel rigidly connected with the base. Sources of information taken into account; during examination 1. USSR Copyright Certificate No. 306946, cl. 23 C: 17/02, 17.11. 69