CN201693387U

CN201693387U - Worm-and-gear collet locking mechanism

Info

Publication number: CN201693387U
Application number: CN2010201138891U
Authority: CN
Inventors: 廖进堃
Original assignee: Jiaxing Yongjia Precision Machinery Manufacturing Co Ltd
Current assignee: Jiaxing Yongjia Precision Machinery Manufacturing Co Ltd
Priority date: 2009-12-14
Filing date: 2010-01-22
Publication date: 2011-01-05
Anticipated expiration: 2020-01-22

Abstract

The utility model relates to a locking mechanism for the cutter of a machine tool. The purpose of the utility model is to provide the locking device which has the advantages that the replacement and the adjustment of the cutter are convenient, the structure is compact and the clamping accuracy is high to accurately, reliably and conveniently clamp and fix the cutter. The technical scheme is that the worm-and-gear collet locking mechanism comprises a body with a cavity machined at a right half part; the right end of the cavity is conical, a conical collet which is matched with the cavity and is used for clamping a cutter handle is arranged in the cavity, and the conical collet is provided with a plurality of contraction joints along the direction of a conical generatrix. The locking mechanism is characterized in that a worm-and-gear mechanism which applies acting force to the conical collet along the direction of the axis of the body is additionally arranged in the body. A gear in the worm-and-gear mechanism is coaxially installed with the body, the left end of the gear is fit with the body through threads, the right end of the gear is fit with the left end of the conical collet through threads, and the direction of the threads at the left end and the direction of the threads at the right end are opposite to each other.

Description

A kind of Worm-gear type collet chuck locking mechanism

Technical field

The utility model relates to a kind of locking device of machine tool, specifically is the fixing retaining mechanism of instrument such as milling bit on all kinds of Metal Cutting Machine Tools.

Background technology

In the production practices process, tend to run into because of cutter clamping shank diameter too greatly can't deep hole processing or the problem of dark bottom surface.Cutter grip shank on the existing market generally is the split type handle of a knife of price comparison costliness and the interchangeability very poor cutter of the same diameter of clamping (handle of a knife can only) and needs lock the handle of a knife of cutter with tearing blind rivet open.

Shown in Figure 1 is conventional collet chuck nut type handle of a knife comprises handle of a knife body 2, and the lower end of handle of a knife body is equipped with a locking nut 3, and tool-holder is contained in the clamping chamber of handle of a knife body lower end and by locking nut 3 and locks.This type of Knife handle structure is simple, but when rapidoprint, the 1A place in the material 1 and the 3A place of locking nut 3 have interference, so this type of handle of a knife can not be processed the deep hole in the material 1.

Shown in Figure 2 is conventional hot charging formula handle of a knife, comprises handle of a knife body 2A, and tool-holder is contained in the clamping chamber of handle of a knife body lower end.As can be seen from the figure, the diameter of handle of a knife body is less, can finish the processing to the deep hole in the material 1, but the versatility of this type of handle of a knife is not strong, handle of a knife can only the same diameter of clamping cutter, and handle of a knife itself also needs cutter to be packed in the clamping chamber with the hot charging machine.

The utility model content

The purpose of this utility model is the deficiency that overcomes the above-mentioned background technology, a kind of improvement of retaining mechanism is provided, this retaining mechanism should have changes and adjusts cutter convenience, compact conformation, characteristics that the clamping precision is high, with can be accurately, reliably, easily cutter is gripped.

The technical solution adopted in the utility model is: a kind of Worm-gear type collet chuck locking mechanism comprises that right half part is shaped on the body of cavity; The right-hand member of described cavity is taper, is provided with a tapered collet that is used for the clamping handle of a knife that matches with it in the cavity, and described tapered collet is shaped on some shrinkage joints along the taper generatrix direction; It is characterized in that: the worm-and-wheel gear that a pair of tapered collet applies the active force on the body axis direction also is set in the described body.

Worm gear in the described worm-and-wheel gear and body coaxial line are installed, and its left end and body be by threaded engagement, and right-hand member then passes through threaded engagement with the left end of described tapered collet, and the hand of spiral at two ends, the left and right sides is opposite.

Be shaped on the groove that is linked to be a circle around the outer wall circumferencial direction on the described worm gear; Described body is provided with limit screw and the lock-screw that matches with described groove.

Each shrinkage joint on the described tapered collet all extends to the right and connects with the right-hand member edge of tapered collet.

Operation principle of the present utility model is: utilize space angle conversion and the bigger characteristics of gearratio in the worm-and-wheel gear, when using the spanner rotary worm from the outside, worm gear in the cavity can rotate accordingly, thereby drive tapered collet side-to-side movement on the axis direction of collet chuck, reach the purpose of locking or loosening cutter.

The beneficial effects of the utility model are: when installation or replacing cutter, only need can realize locking or loosening cutter with the spanner rotary worm, and need not from lathe to pull down handle of a knife laborsaving and replacing and easy to adjust; The locking degree of collet chuck can be controlled by worm screw, can be accurately, reliably cutter is gripped; Simple and compact for structure, make more or less freely and cost is lower.

Description of drawings

Fig. 1 is the structural representation of the collet chuck nut type handle of a knife of routine.

Fig. 2 is the structural representation of the hot charging formula handle of a knife of routine.

Fig. 3 is a main TV structure schematic diagram of the present utility model.

Fig. 4 be among Fig. 3 B-B to the sectional structure schematic diagram.

Fig. 5 be among Fig. 3 A-A to the sectional structure schematic diagram.

The specific embodiment

Below in conjunction with Figure of description the technical solution of the utility model is described further.

As Fig. 4, shown in Figure 5, a kind of Worm-gear type collet chuck locking mechanism comprises that right half part is shaped on the body 8 of cavity (as can be seen from the figure, the left end of this cavity is a cylindricality, and right-hand member is taper); Be provided with a tapered collet 9 that matches with this body (tool-holder is contained in the clamping chamber of tapered collet) in the described cavity; Also be provided with a worm gear 10 (this worm gear and body coaxial line are installed) in the described cavity, the left end of this worm gear 10 and described body are by threaded engagement (10A place among the figure), and the left end of the right-hand member of worm gear 10 and described tapered collet 9 is by threaded engagement (10B place among the figure); Also be provided with on the described body 8 one with the worm screw 11 of described worm wheel.

The hand of spiral at two ends, worm gear 10 left and right sides (10A, 10B place among the figure) is opposite, makes tapered collet 9 can be on its axis direction be consistent with the direction of motion of worm gear 10.

The top of described worm screw 11 is provided with hexagonal screw 11A, can use die nut that it is rotated, thereby drives worm gear 10 rotations and then make tapered collet 9 motion to the left or to the right on the axis direction of collet chuck, can lock or loosening cutter 17; Described worm screw 11 is also disposed a jump ring 16, to realize the location of worm screw.

Be shaped on the groove 12 that is linked to be a circle around the outer wall circumferencial direction on the described worm gear 10; Described body is provided with match with described groove limit screw 13 and lock-screw 14, make worm gear 10 can only be on the axis direction of collet chuck motion limited distance to the left or to the right.

Described tapered collet 9 is shaped on some shrinkage joint 9C along the taper generatrix direction, and each shrinkage joint all extends to the right and connects with the right-hand member edge of tapered collet, makes tapered collet radially have certain elastic movement leeway; When tapered collet 9 was subjected on the axis direction of pulling force at collet chuck of worm gear 10 to left movement, the cavity of handle of a knife body can be exerted pressure to collet chuck, makes the tapered collet radial contraction, and then the locking cutter; When moving right on tapered collet is subjected to the axis direction of thrust at collet chuck of worm gear, tapered collet is recovered original state, loosening cutter 17.

Claims

1. a Worm-gear type collet chuck locking mechanism comprises that right half part is shaped on the body of cavity (8); The right-hand member of described cavity is taper, is provided with a tapered collet that matches with it (9) in the described cavity, and described tapered collet is shaped on some shrinkage joints along the taper generatrix direction (9C); It is characterized in that: the worm-and-wheel gear that a pair of tapered collet (9) applies the active force on the body axis direction also is set in the described body (8).

2. a kind of Worm-gear type collet chuck locking mechanism according to claim 1, it is characterized in that: the worm gear in the described worm-and-wheel gear (10) is installed with body (8) coaxial line, its left end and described body (8) pass through threaded engagement, right-hand member then with the left end of described tapered collet (9) by threaded engagement, the hand of spiral at two ends, the left and right sides is opposite.

3. a kind of Worm-gear type collet chuck locking mechanism according to claim 1 and 2 is characterized in that: be shaped on the groove (12) that is linked to be a circle around the outer wall circumferencial direction on the described worm gear (10); Described body (8) is provided with limit screw (13) and the lock-screw (14) that matches with described groove (12).

4. a kind of Worm-gear type collet chuck locking mechanism according to claim 1 and 2 is characterized in that: each shrinkage joint (9C) on the described tapered collet (9) all extends to the right and connects with the right-hand member edge of tapered collet.