JPS6150606U - - Google Patents

Description

[Brief explanation of the drawing]

The drawings show one embodiment of the boring unit according to this invention. Fig. 1 is a partially cutaway front view, Fig. 2 is a partially cutaway right side view, and Fig. 3 is a partially cutaway front view. FIG. 4 is a partial sectional view taken along the line - in FIG. 2, and FIG. 4 is a partial sectional view taken along the line - in FIG. 10...Unit body, 12...Spindle mounting part,
14...Screw shaft, 16...Tool holder, 20...First
Gear reduction mechanism, 22... Internal gear, 22a, 22
b...Axially extending groove, 24...Sun gear, 26...Planetary gear, 30...Second gear reduction mechanism, 32...Elliptical cam, 34...Ball bearing, 36...Flexible outer ring, 38...Flexible tooth ring , 40... First internal ring, 42... Second internal ring, 44, 46... Bevel gear, 50... Outer ring, 50a, 58, 74... Pressurized fluid path, 52
...Ring restraining pin, 54...First gear stopper,
56, 64...Spring, 60...Gear restraint piston, 6
2...Second gear stopper, 70...Spindle, 7
2...Stationary fluid supply block.

Amendment July 26, 1980 The scope of claims for utility model registration is amended as follows.

[Claims for Utility Model Registration] A tool holder is provided at the end of the unit body opposite to the spindle attachment part, which can be slightly moved in the radial direction of the unit body by low-speed rotation of a screw shaft extending in the radial direction of the unit body. It is a boring unit,
Between the part of the unit body adjacent to the spindle installation part and the screw shaft installation part, in a state where the outer peripheral part protrudes outward from the unit body, it is concentrically with the unit body and integrally with the unit body when not restrained. an internal gear rotatably installed and having first and second axially extending grooves adjacent to each other at an interval around the axis on the outer periphery, the internal gear being installed concentrically with the unit body inside the internal gear; a first gear reduction mechanism including a sun gear and a planetary gear interposed between the internal gear and the sun gear; and an input or intermediate gear reduction mechanism installed concentrically with the unit body adjacent to the first gear reduction mechanism. an elliptical cam capable of forming a member; an elliptical flexible toothed ring fitted around the cam via an elliptical ball bearing having a flexible outer ring; and a flexible toothed ring fitted around the flexible toothed ring. a first internally toothed ring capable of forming an input or output or an intermediate member having the same number of teeth as the flexible toothed ring, axially spaced to engage the longitudinal axis of the flexible toothed ring; a second gear reduction mechanism including a second internal gear ring capable of forming an output or intermediate member having more teeth than the tooth ring; and first or second teeth forming the output member of the second gear reduction mechanism. A pair of bevel gears that transmitably connect the ring and the screw shaft are installed, while a pair of bevel gears are installed around the unit body adjacent to the outer periphery of the internal gear of the first gear reduction mechanism. An outer ring with a pressurized fluid path that is relatively rotatable is fitted to the outer ring, and the outer ring can engage with a first axially extending groove of the internal gear to restrain rotation of the internal gear. an axially movable unit body having a first gear stopper and engaged with a spring that normally urges the first gear stopper to engage with the first axially extending groove; When a ring restraining pin with a pressurized fluid path is attached to the spindle mounting portion of the unit body on the spindle, the tip engages with the immovable fluid supply block with a pressurized fluid path adjacent to the spindle and prevents the rotation of the outer ring. and moves against the biasing force of the spring to take a position where the first gear stopper is separated from the first axially extending groove, and is adjacent to the ring restraining pin. The internal gear has a second gear stopper that can be engaged with the second axially extending groove of the internal gear, and the second gear stopper is normally engaged with the second axially extending groove of the internal gear.
A gear restraining pin that is movable in the axial direction of the unit body and is engaged with a spring that urges it to take a position where it does not engage with the axially extending groove of the unit body is attached to the spindle at the spindle attachment part of the unit body. In this state, when fluid pressure is applied from the pressurized fluid path of the stationary fluid supply block through the ring restraint pin and the pressurized fluid path of the outer ring, the second gear stopper moves against the biasing force of the spring. A boring unit installed in a position to engage with the second axially extending groove.

Claims (1)

[Scope of utility model registration request] A boring unit comprising, at an end of the unit body opposite to the spindle attachment part, a tool holder that can be slightly moved in the radial direction of the unit body by low-speed rotation of a screw shaft extending in the radial direction of the unit body,
Between the part of the unit body adjacent to the spindle installation part and the screw shaft installation part, in a state where the outer peripheral part protrudes outward from the unit body, it is concentrically with the unit body and integrally with the unit body when not restrained. an internal gear rotatably installed and having first and second axially extending grooves adjacent to each other at an interval around the axis on the outer periphery, the internal gear being installed concentrically with the unit body inside the internal gear; A first gear reduction mechanism including a sun gear and a planetary gear interposed between the internal gear and the sun gear, and an input member installed concentrically with the unit body adjacent to the first gear reduction mechanism. a formable elliptical cam, an elliptical flexible tooth ring fitted around the cam via an elliptical ball bearing having a flexible outer ring, a length of the flexible tooth ring around the flexible tooth ring; fitted at intervals in the axial direction so as to engage with the shaft portion;
a first internally toothed ring capable of forming an input or output member having the same number of teeth as the flexible toothed ring; and a second internally toothed ring capable of forming an output member having more teeth than the flexible toothed ring. A gear reduction mechanism,
A pair of bevel gears that transmissionly connect the first or second tooth ring forming the output member of the second gear reduction mechanism and the screw shaft are installed, while the outer periphery of the internal gear of the first gear reduction mechanism An outer ring with a pressurized fluid path that is rotatable relative to the unit body and the internal gear is fitted around the unit body adjacent to the internal gear, and the first internal gear of the internal gear is connected to the outer ring. It has a first gear stopper that can engage with the axially extending groove to restrain rotation of the internal gear, and the first gear stopper is normally engaged with the first axially extending groove. When a ring restraint pin with a pressurized fluid path that is movable in the axial direction of the unit body and is engaged with a spring that biases the pin is attached to the spindle attachment part of the unit body, the tip end is adjacent to the spindle. The first gear stopper engages with the stationary fluid supply block with a pressurized fluid path to restrain the rotation of the outer ring, and moves against the biasing force of the spring, so that the first gear stopper
a second gear stopper disposed so as to be spaced apart from the axially extending groove of the internal gear and adjacent to the ring restraining pin and capable of engaging with the second axially extending groove of the internal gear; a gear restraining pin which is movable in the axial direction of the unit body and is engaged with a spring that normally urges the second gear stopper to assume a position in which it does not engage with the second axially extending groove; When fluid pressure is applied from the pressurized fluid path of the stationary fluid supply block through the ring restraint pin and the pressurized fluid path of the outer ring with the spindle device part of the unit body mounted on the spindle, the biasing force of the spring is A boring unit configured to move against the gear so as to assume a position in which the second gear stopper engages the second axially extending groove.