RU2009779C1

RU2009779C1 - Drill wrenchless chuck

Info

Publication number: RU2009779C1
Authority: RU
Inventors: Станислав Дмитриевич Ефанов; Валерий Хазбич Кануков
Original assignee: Станислав Дмитриевич Ефанов; Валерий Хазбич Кануков
Priority date: 1990-12-10
Filing date: 1990-12-10
Publication date: 1994-03-30

Abstract

FIELD: machine tool manufacture. SUBSTANCE: chuck has a shank on which a body is mounted for rotation when a tool is clamped or unclamped. The body is threadedly connected to a nut which has an inner conical surface embracing the clamping members. The clamping members are engageable with the surface of a screw head by end surfaces for their axial movement. The screw is located in a threaded hole of the shank and is fixed against rotation relative to the body. The end of the screw head facing the clamping members is made in the form of a solid flat surface, mating flat surfaces are made on the clamping members. Inclined surfaces are made in the body, guide columns threadedly connected to the clamping members are located in the inclined surfaces for axial movement. Extension springs are also positioned in the body, one end of the springs is connected to the columns, and the other one - to locking devices. The columns when moving are positioned in radial slots of the screw head. The chuck also has a set of protective members in the form of bushes mounted in bores on the nut end. EFFECT: improved structure. 4 cl, 1 dwg

Description

Изобретение относится к области обработки материалов резанием, а именно к приспособлениям для зажима осевого инструмента, в частности сверл. The invention relates to the field of processing materials by cutting, and in particular to devices for clamping an axial tool, in particular drills.

Цель изобретения - повышение точности центрирования осевого инструмента. The purpose of the invention is to increase the accuracy of centering of the axial tool.

На чертеже изображен сверлильный бесключевой патрон, общий вид. The drawing shows a keyless drill chuck, General view.

Патрон содержит хвостовик 1 с соосно расположенными резьбовым и коническим отверстиями, предназначенными для соединения со шпинделем. На хвостовике установлен корпус 2, связанный посредством резьбы с гайкой 3, имеющей коническую поверхность для охватывания наружных поверхностей зажимных элементов 4, которые взаимодействуют торцевыми поверхностями с поверхностью головки винта 5, для перемещения их в осевом направлении. The cartridge contains a shank 1 with coaxially arranged threaded and tapered holes intended for connection with the spindle. A housing 2 is mounted on the shank, connected by a thread to a nut 3 having a conical surface for covering the outer surfaces of the clamping elements 4, which interact with the end surfaces with the surface of the screw head 5, to move them in the axial direction.

Для повышения точности центрирования инструмента, торец головки винта 5, обращенный к зажимным элементам 4, выполнен в виде сплошной плоской поверхности, на зажимных элементах 4 выполнены ответные плоские поверхности. В наклонных отверстиях корпуса 2 патрона расположены фиксаторы 6 и втулки 7, в которых размещены направляющие колонки 8, соединенные посредством резьбового соединения с зажимными элементами 4, и пружины растяжения 9, связанные одним концом с колонками 8, а другим - с фиксаторами 6. To increase the accuracy of centering the tool, the end face of the screw head 5, facing the clamping elements 4, is made in the form of a continuous flat surface, reciprocal flat surfaces are made on the clamping elements 4. In the inclined openings of the cartridge case 2, there are latches 6 and bushings 7, in which guide columns 8 are placed, connected by a threaded connection to the clamping elements 4, and tensile springs 9, connected at one end to the columns 8, and to the clamps 6 at the other.

Предложенная связь (колонка 8, пружина 9, фиксатор 6) обеспечивает зажимным элементам две степени свободы - поступательное и вращательное, способствующее самоцентрированию зажимным элементам в момент зажима инструмента. Надежность самоцентрирования обеспечивается наличием двух зажимных кромок на каждом зажимном элементе. Указанная связь гарантирует устранение зазора между торцами зажимных элементов 4 и головкой винта 5, за счет чего повышается точность центрирования осевого инструмента. Для повышения надежности осевой ориентации колонки 8 со стороны зажимных элементов 4 при осевом перемещении расположены в радиальных пазах на головке винта 5. Винт 5 зафиксирован от поворота относительно оси корпуса штифтом 10, запрессованного в корпус 2 и сопряженный с пазом на головке винта 5. The proposed connection (column 8, spring 9, retainer 6) provides the clamping elements with two degrees of freedom - translational and rotational, which facilitates self-centering of the clamping elements at the time of clamping the tool. Reliability of self-centering is ensured by the presence of two clamping edges on each clamping element. This connection guarantees the elimination of the gap between the ends of the clamping elements 4 and the screw head 5, thereby increasing the accuracy of centering of the axial tool. To increase the reliability of the axial orientation of the column 8 from the side of the clamping elements 4 during axial movement, they are located in radial grooves on the screw head 5. The screw 5 is fixed against rotation relative to the axis of the housing by a pin 10, pressed into the housing 2 and mated with a groove on the screw head 5.

Для уменьшения удельной материалоемкости, габаритов, массы и расширения технологических возможностей, путем увеличения диапазона диаметров зажимаемого инструмента, в конструкцию введен дополнительный комплект зажимных элементов, при этом один комплект зажимает осевой инструмент в интервале от 0,5 до 8 мм, а второй - от 4 до 12 мм. На торцах зажимных элементов выполнены резьбовые отверстия, предназначенные для их соединения с элементами конструкции. To reduce the specific material consumption, dimensions, mass and expand technological capabilities, by increasing the diameter range of the clamped tool, an additional set of clamping elements was introduced into the design, while one set clamps the axial tool in the range from 0.5 to 8 mm, and the second from 4 up to 12 mm. Threaded holes are made at the ends of the clamping elements for connecting them to structural elements.

Для повышения долговечности патрона на торце гайки 3 выполнена расточка, а патрон снабжен комплектом защитных элементов 11 в виде втулок с отверстиями под инструмент, предназначенных для установки в упомянутой расточке. To increase the durability of the cartridge, a bore is made at the end of the nut 3, and the cartridge is equipped with a set of protective elements 11 in the form of bushings with holes for the tool, intended for installation in the aforementioned bore.

Установка инструмента, его зажим и разжим осуществляется следующим образом. The installation of the tool, its clamping and expansion are as follows.

При вращении стопорного кольца 12, установленного на поверхности торца хвостовика 1, по часовой стрелке относительно оси патрона, винт 5 перемещает зажимные элементы 4 и происходит зажим инструмента. При вращении кольца 12 против часовой стрелки в результате перемещения зажимных элементов в обратную сторону, происходит разжим инструмента. (56) Патент ФРГ N 1810614, кл. B 23 B 31/04, 1968. When rotating the locking ring 12 mounted on the surface of the end of the shank 1, clockwise relative to the axis of the chuck, the screw 5 moves the clamping elements 4 and the tool is clamped. When the ring 12 rotates counterclockwise as a result of the movement of the clamping elements in the opposite direction, the tool is expanded. (56) Patent of Germany N 1810614, cl. B 23 B 31/04, 1968.

Claims

1. A BORING CIRCLE-FREE CARTRIDGE containing a shank with coaxially arranged threaded and conical holes intended for connection to the spindle, located on the shank with the possibility of rotation relative to it when the tool is in contact with one another, which is sealed, the threaded hole of the shank is fixed from a turn relative to the body of the screw with the head, clamping elements installed with the possibility of interaction with the screw head and a morning conical surface of the nut, and a protective device, characterized in that, in order to increase the centering accuracy of the tool, the end of the screw head facing the clamping elements is made in the form of a solid flat surface, and the reciprocal flat surfaces are made on the clamping elements, including a cartridge bushings mounted in the housing of inclined holes installed in them with the possibility of axial movement of the directional columns connected by means of a threaded connection with clamping elements, p zmeschennymi in inclined otvepstiyah fiksatopami, and in bushings - pastyazheniya compressed springs connected with one ends of the columns, and other - with fiksatopami, VARIATIONS this column with stopony paspolozheny clamping elements formed on a screw head padialnyh grooves.

2. The cartridge according to claim 1, characterized in that the screw is fixed from the rotation relative to the housing by means of a pin secured in the housing and mating with a groove in the screw head.

3. The cartridge according to claim 1, characterized in that, in order to expand the diameter range of the tool clamped in the cartridge, it is equipped with an additional set of clamping elements.

4. The cartridge according to paragraphs. 1 and 3, characterized in that, in order to increase the longevity of the cartridge, the protective device is made in the form of a set of bushings with a hole for a tool intended for placement in a hole made on the end of the nut.