CN87104385A - The braking of metal-cutting machine tool shaft transmission and lugs - Google Patents

Abstract

The braking and the lugs of the metal-cutting machine tool shaft transmission of a casing, in a groove, place a bar, a cam is housed on this bar, cam contacts with brake apparatus with arm by a bolt, logical cylindrical pin contacts bar again with lugs, these lugs have a protective cover that covers the lathe workpiece, the straight pin of lugs is placed in the hole of casing, its top end is below a hole on the bar, its bottom then contacts with a open slot on the cam, and cam is to be contained on the piece that is anchored on the casing.Hole on the bar is oval-shaped in the cross section of bar.

Description

The present invention is the braking and the lugs of relevant metal-cutting machine tool shaft transmission.This device is connected with mechanism and a protective cover that covers this workpiece of a starting lathe workpiece rotation.

The braking of known metal-cutting machine tool shaft transmission and lugs comprise the bar of a device on the main shaft speed change box body, have fixed a forked part that is connected with a cannelure by a cylinder ring at an end of bar; A double-arm lever and an axle that has second bar, this axle is connected with a sleeve by a straight pin; This sleeve is connected the left side or the right-hand part of the multiplate clutch of main shaft forward or reverse with one respectively.Near forked part, on bar, mill into the groove of several symmetries, groove has high and two low surfaces, these surfaces are connected with roller on the arm that is contained in double-arm lever by an axle, another arm at double-arm lever tightens a bolt, bolting a braking belt, it with brake drum and rub mutually.The other end at bar is processed into tooth bar, and this tooth bar is meshed with being fixed on a sector gear on the axle, and this then is connected with starting or the lever control system that stops machine tool chief axis rotation.This end by the bar of a sleeve in the main shaft speed change box body is processed into the cone of two butts, towards they little basal plane toward each other; In the front of this configured ends of bar, a straight pin as the parking part is housed, this pin is contained in the special piece that is positioned on the gear box outer wall.One end of straight pin contacts with the configured ends of bar, its other end then contacts or enters in the radial hole of above-mentioned external cylindrical surface with the external cylindrical surface of ring, a groove has been cut on the one side that is in casing in the end surfaces of ring, a pin that is contained in the casing enters in the groove, in the end positions of the two ends of groove fixed blade guard.

A design that weak point is its complexity of the braking of above-mentioned metal-cutting machine tool shaft transmission and lugs, this design comprises a leverage, some transmission devices and at the brake apparatus of the mechanism of parts rotations that starts to work, workpiece with cover other part that plays the connection effect between the lugs of protective cover of workpiece.Therefore, in these parts certain some will be fixed on the casing of gearbox from the outside, so this just requires a large amount of connections and friction surface, may in manufacture process, cause simultaneously the appearance of error, wearing and tearing in use occur and will introduce additional part for the end of fixed blade guard.

A general purpose of the present invention is exactly braking and the lugs that will develop a kind of metal-cutting machine tool shaft transmission, in this device, being connected between the lugs of the mechanism of the parts that start to work rotations, the brake apparatus of workpiece and the protective cover that covers workpiece is to greatest extent simply and comprise the part of minimum number.

This purpose is to reach by braking and the lugs of developing a kind of like this metal-cutting machine tool main shaft speed change, it comprises a casing, a bar is installed in the groove in casing, adorn a cam facing to bar, this cam contacts with brake apparatus by a bolt and an arm, by a straight pin, bar also is connected with lugs, protective cover that covers the lathe workpiece of this lugs band.According to this invention, the straight pin of lugs is placed in the hole of casing, and therefore, its upper end just is in the below in a hole on the bar, and its lower end and the open slot on the cam contact, and cam is mounted on the seat that is securely fixed on the casing.In a screwed hole of cam, the protective cover that covers the lathe workpiece is installed, the hole on the bar is oval-shaped in the cross section of bar.

In order to understand this invention better, reference material should be with accompanying drawing, and this figure illustrates and explain one embodiment of the invention.In the drawings:

Fig. 1 is an isometric cutaway view of this device;

Fig. 2 is the top view of this device;

Fig. 3 is the longitudinal sectional view of this device;

Fig. 4 is along the transverse sectional view of B-B among Fig. 3;

Fig. 5 is along the transverse sectional view of C-C among Fig. 3;

Fig. 6 is along the transverse sectional view of D-D among Fig. 3.

According to invention, the braking of metal-cutting machine tool shaft transmission and lugs comprise the bar 1 in a rectangle cross section, one end of this bar has a columniform hole, the pin axis 2 of a driving lever is housed in the hole, the cross section of the bottom of this bar is a rectangle, it contacts with cannelure on the periphery of shaft transmission Clutch Control cylinder ring 8, on the axle of driving lever 2, the arm 3 in a rectangle cross section is housed.In the cylindrical hole on arm 3, an axle 4 is installed vertically, it is in covers in 27 the hole, on the top of axle 4 wheel hub 5 is housed, and a hole is arranged on the periphery of wheel hub, is pressed into a handle 6 with handgrip 7 in the hole; On bar 1, a cam 9 is equipped with on the right that is positioned at shift lever axis 2, it contacts with the hemispherical head of screw 10 on being contained in arm 13, after the definite position of screw 10 with respect to cam 9, with nut 11 it is locked, arm 13 is by two straight pins, 14 guiding that firmly are contained on the casing 26, compressed cylindrical spring 12 of suit on the axle of screw 10, it is limited between arm 13 and the casing 26, a steel band 16 is housed on arm 13, asbestos friction band 15 is housed on steel band, it rubs mutually with the face of cylinder of braking drum 17, the free terminal of steel band 16 makes the cylinder earrings, and is connected on " U " shape fork 18 by an axle 28." U " shape fork 18 is contained in by screw 19 in the cylindrical hole of axle 22, and axle 22 is contained on the casing 26 securely, and the axle of screw 19 is compression cylindrical spring 20 guiding, and spring 20 is limited between 22 and two nuts 21 of axle.The other end of bar 1 is placed in the groove of casing 26, and its end face is limited by lid 27.In a hole of casing 26 straight pin 24 is housed with a gap, the top of straight pin is in the below in the hole 29 on the bar 1, and the open slot 31 on its bottom and the cam 23 contacts, and cam 23 is to be contained in to fixedly secure on the pedestal on the casing 26 25.In a screw of cam 23, fix a protective cover 30 that covers the lathe workpiece.

The braking of metal-cutting machine tool shaft transmission and the manipulation of lugs are as follows:

By handgrip 7, handle 6, wheel hub 5, axle 4, arm 3 and driving lever 2 are that forward or reverse makes bar 1 remove the center to the left or to the right according to machine tool chief axis.Control loop 8 by driving lever 2 and clutch makes it engagement.When bar 1 is in the center, throw-out-of clutch and brake work just can be opened the protective cover 30 in the hole that is contained in cam 23 in this case.When bar 1 moved apart the center, the head of screw 10 withdrawed from the groove of cam 9 under the effect of spring 12, and steel band 16 and asbestos friction band 15 unclamp from braking drum 17, and just brake is not worked.When adjustment screw 10 is locked it with nut 11 during with respect to the position of cam 9, thereby come the abrasion of accommodation zone 15 with respect to the position compensating band 15 of drum 17 by spring 20, when bar 1 is in the center, the hole of bar 1 right-hand member just in time is in the position relative with the hole of casing 26, straight pin 24 moves in this hole, and can rotate, it is possible promptly opening protective cover 30, and under the action of the open slot 31 of cam 23, cylindrical pin 24 is upwards boosted and is entered in the hole of bar 1, so bar 1 is lockable, and can not move under external force simultaneously, be throw-out-of clutch and brake work, main shaft can not rotate.When opening protective cover 30, provide the parking of clutch, so operating personnel also are safe.When closing protective cover 30, promptly when workpiece was covered, straight pin 24 was in the lowest region of the open slot 31 of cam 23, and does not enter in the hole of bar 1.Bar 1 motion, clutch is closed and the brake disengagement, and protective cover 30 can not rotate in this case, and promptly it can not be opened.Therefore work as main shaft and guarantee that just when rotated protective cover is closed.The open slot 31 of cam 23 has been guaranteed the fixed position, two ends of protective cover 30 with straight pin 24 and lid 27, thereby no longer needs other stop.Bar 1 moves in the groove of casing 26, and is pushed down from above by lid 27, and this just makes it can not be on the limit or upwards skew.

Claims (2)

1, the braking and the lugs of Metal Cutting Machine Tool main shaft speed case, comprise a casing, bar of device in the groove therein, on bar, fix a cam, this cam contacts with rot with an arm by a bolt, simultaneously by a straight pin, bar again with have lugs that cover the protective cover of lathe workpiece and be connected, it is characterized in that: the straight pin of lugs (24) is placed in the hole of casing (26), so that its top places the below in a hole (29) of bar (1), its bottom then and the open slot 31 of cam (23) contact, cam (23) is installed on the piece (25) that is anchored on the casing (26), and a protective cover 30 that covers the lathe workpiece is installed in a screwed hole of cam (23).

2, according to the braking and the lugs of the metal-cutting machine tool shaft transmission of claim 1, the hole of its king-rod 1 (29) are oval-shaped in the cross section of bar (1).

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