CN201253701Y

CN201253701Y - Quick replaceable drill bit

Info

Publication number: CN201253701Y
Application number: CNU2007201297580U
Authority: CN
Inventors: 瞿国权; 冯晓飞
Original assignee: WUHU HONGJIN MACHINE TOOL CO Ltd
Current assignee: WUHU HONGJIN MACHINE TOOL CO Ltd
Priority date: 2007-12-28
Filing date: 2007-12-28
Publication date: 2009-06-10
Anticipated expiration: 2017-12-28

Abstract

The utility model discloses a quick-change drill bit. A ring-shaped supporting retainer ring (6) is arranged at the lower end of a main spindle box (3), a sliding outer sleeve (10) is arranged at the lower end of a main spindle (14), and a quick-change drill holder (15) is arranged inside a taper hole. The utility model is characterized in that the ring-shaped supporting retainer ring (6) is collided with a steel ball (9) at the upper end of the sliding outer sleeve (10) so that the quick-change drill holder (15) can automatically withdraw the taper hole; the sliding outer sleeve (10) and the supporting retainer ring (6) are sleeved on the main spindle of a drill press in the hollow mode, a withdrawal transverse pin passes through a slotted hole of the main spindle and is fixed together with the sliding outer sleeve (10), and two screw pins are clamped on the lower arc surface of the slotted hole to support a supporting retainer ring (12). The quick-change drill bit adopting the structure has convenient and quick operation, simple structure, easy manufacture and large transmission torque.

Description

A kind of quick change drill bit

Technical field

The utility model relates to a kind of quick change drill bit that is fitted to all kinds of drilling machines.

Background technology

At present, known quick change drill bit by: fixedly drill holder, slip cutting ferrule, cylinder quick change drill holder combine.When changing another kind of cutter, drill press spindle to be mentioned, when cutter leaves workpiece, hand moving cutting ferrule of sliding that makes progress, the another hand is when taking off cylinder quick change drill holder, be loaded at the cylinder quick change drill holder that another kind of cutter will be housed, the slip cutting ferrule is shifted onto downwards the position make it to block.Though this quick change drill bit can be realized quick change but troublesome poeration, and is time-consuming, complex structure, it is little to transmit moment of torsion, loss drilling machine power, the cutter that only adapts to below 15 millimeters uses.When taking off fixedly drill holder, must beat just and can withdraw from by wedge and hammer, this method is damaged cutter and drill holder easily, directly has influence on the precision and the service life of drilling machine.

The utility model content

Technical problem to be solved in the utility model is: provide a kind of easy and simple to handle, simple in structure, increase the quick change drill bit that transmits moment of torsion.

Solve this technical problem, the technical solution of the utility model is: a kind of quick change drill bit, mounting support hits circle in the lower end of main spindle box, sliding outer cover and supporting ring washer sky are enclosed within on the drill press spindle, move back and unload slotted hole and the sliding outer cover that lateral pin passes main shaft and be fixed together, two screw pins are stuck on the following arc surface of slotted hole, will support back-up ring and hold, four back-moving springs are arranged thereon between sliding outer cover and main shaft, sliding outer cover is resetted.In six circular holes of sliding outer cover upper surface six steel balls are housed, it is to be used for eliminating moving back when unloading hitting the spin friction of circle with supporting and bearing and to move back the impulsive force of unloading automatically.Need only during operation drill press spindle is upwards carried, make the supporting on running at the bottom of the main spindle box of the steel ball of sliding outer cover upper surface hit circle, because of being subjected to its resistance, sliding outer cover drives moving back in it and unloads lateral pin and press down, and forces quick change drill holder or cutter to move back automatically and unloads, when needing to change another kind of cutter, as long as hold the outer rotation set on the quick change drill holder, under spindle taper hole, boost, promptly finish changing the outfit, reach the purpose of quick change cutter.

Owing to adopt such scheme, when not stopping, realized easily moving back automatically and unloaded cutter and quick change cutter.This device has the function that is used with the quick change drill holder, also has the independent function of using, and is convenient to operation, simple in structure, be easy to make, and it is big to transmit moment of torsion.

Description of drawings

Below in conjunction with accompanying drawing a kind of quick change drill bit of the utility model is done explanation in further detail;

Fig. 1 is the general assembly schematic diagram of a kind of quick change drill bit of the utility model;

In Fig. 1,1, sliding sleeve; 2, fairlead; 3, main spindle box; 4,7, screw; 5, valve rubber; 6, circle is hit in supporting; 8, pressing plate; 9, steel ball; 10, sliding outer cover; 11, move back and unload lateral pin; 12, supporting back-up ring; 13, screw pin; 14, main shaft; 15, quick change drill holder; 16, outer rotation set; 17, wire circlip; 18, cutter.

The specific embodiment

As shown in Figure 1, supporting is hit circle 6, valve rubber 5 by on the main spindle box 3, three screw holes of fixed guide cover 2, and fixing by screw 4, valve rubber plays damping effect.Sliding outer cover 10, supporting back-up ring 12 skies are enclosed within on the main shaft 14, it is matched in clearance, it is fluent freely to slide between each face, move back and unload slotted hole and the sliding outer cover 10 that lateral pin 11 passes main shaft 14 and be fixed together by screw 7, two screw pins 13 screw by supporting back-up ring 12 is stuck on the following arc surface of slotted hole of main shaft 14, and it is held.Be that quick change drill holder 15 is installed in the taper hole of main shaft 14.

Steel ball 9 is contained in six holes of upper surface of sliding outer cover 10, and by pressing plate 8 anticreeps, its steel ball 10 can freely rotate in the hole, can eliminate to move back automatically when unloading and hit the spin friction of circle and the power that withstands shocks with supporting.Spring is fixed on supporting by spring holder and hits above the circle 12 between sliding outer cover 10 and main shaft 14, and sliding outer cover is resetted.The interior circular hole of sliding outer cover 10 should be a matched in clearance with the cylindrical of supporting back-up ring, slides freely.The upper end of quick change drill holder 15 is Morse's tapers, cooperates in spindle taper hole, and its lower end is a cylinder, external outer rotation set 16 is housed, and by wire circlip 17 outer rotation set 16 is held, and outer rotation set 16 and cylinder should be matched in clearance, and be free to rotate.During tool changing tool 18, holding outer rotation set boosts quick change drill holder 15 from the spindle taper hole lower end, this moment, quick change drill holder 15 rotated with main shaft, automatically find the key position accurately, finish and change the outfit, outer rotation set 16 rotates with drill holder, and the mohs tapered bore in the cylinder of drill holder lower end can be selected manufacturing as required arbitrarily for use.

Claims

1, a kind of quick change drill bit, it is characterized in that: ring-shaped bearing is installed in main spindle box (3) lower end is hit circle (6), sliding outer cover (10) is installed in main shaft (14) lower end, quick change drill holder (15) is installed in the taper hole, the steel ball (9) that ring-shaped bearing hits circle (6) and sliding outer cover (10) upper end bumps against, and can make quick change drill holder (15) withdraw from taper hole automatically.

2, a kind of quick change drill bit according to claim 1, it is characterized in that: described sliding outer cover (10), supporting back-up ring (6) sky are enclosed within on the drill press spindle, move back and unload slotted hole and the sliding outer cover (10) that lateral pin passes main shaft and be fixed together, two screw pins are stuck on the following arc surface of slotted hole, will support back-up ring (12) and hold.

3, a kind of quick change drill bit according to claim 1 and 2, it is characterized in that: described supporting back-up ring (12) is provided with four back-moving springs that make sliding outer cover (10), and uniform six steel balls (9) are housed on sliding outer cover (10) end face.

4, a kind of quick change drill bit according to claim 3, it is characterized in that: the upper end of described drill holder cooperates with main shaft (14) taper hole, its lower end is a cylinder, and the outer rotation set (16) of external dress has the taper hole with the taper fit of various cutters in the cylinder.