CN102284877A

CN102284877A - Knife hitting reversely buckling device for machine tool main shaft

Info

Publication number: CN102284877A
Application number: CN2011102012512A
Authority: CN
Inventors: 施建南
Original assignee: ZHEJIANG JIANGNAN NC MACHINE CO Ltd
Current assignee: ZHEJIANG JIANGNAN NC MACHINE CO Ltd
Priority date: 2011-07-12
Filing date: 2011-07-12
Publication date: 2011-12-21

Abstract

The invention discloses a knife hitting reversely buckling device for a machine tool main shaft, which is provided with a main shaft, a main shaft box, a knife hitting cylinder and a piston of the knife hitting cylinder, wherein the main shaft is internally provided with a shaft core, a main shaft bearing and a jacking rod; four guide posts are fixed on the main shaft box; a bearing plate is sleeved on the guide posts; a clamping plate is fixed on the bearing plate; the main haft is extended out of the bearing plate and the clamping plate; a rear end cover is fixed on the shaft core; a spring is sleeved in the guide posts; nuts are screwed into the guide posts to press the spring; four pull rods are fixed on the bearing plate; a connecting plate is fixed on the four pull rods and is fixed under the knife hitting cylinder; and a piston is extended out of the connecting plate. The knife hitting reversely buckling device has an ingenious design. When a knife is made, the piston strikes the jacking rod, a counter acting force generated by the striking is born by the bearing plate, the bearing plate floats on the four guide posts, the whole device floats upwards, the spring is compressed, the force applied when the main shaft hits the knife is effectively offset, and the jacking rod moves downwards so that the main shaft hits the knife; and when the main shaft hits the knife, the counter acting force does not exist, so the damage to the main shaft bearing is greatly reduced, and the service life of the main shaft is prolonged.

Description

Knife breaking left-hand thread device for main shaft of machine tool

Technical field

The present invention relates to machine tool field, refer in particular to a kind of knife breaking left-hand thread device for main shaft of machine tool.

Background technology

As everyone knows, the machine tool chief axis system of forging a knife adopted independent knife striking cylinder to forge a knife or simple hydraulic cylinder is forged a knife in the past, thus the power that this dual mode applies when main shaft is forged a knife all by main shaft bearing with the service life of having reduced main shaft bearing.Chinese patent once disclosed a kind of " knife breaking left-hand thread device for main shaft of machine tool " (China, notification number CN201604021U, October 13 2010 day for announcing), be provided with main shaft, be fitted with pull bar in the inner chamber of main shaft, pull bar one end is set with disk spring, the pull bar other end radially is fixed with key, the keyway of main shaft is passed at the two ends of key, and the main shaft left end is fixed with air ring, is set with piston on the main shaft, piston is positioned at cylinder body, cylinder body is set with sleeve outward, is compressed with compression spring between sleeve right-hand member and the cylinder body right-hand member, and the cylinder body left end is fixed with support set.It is on the basis of original hydraulic cylinder, and the power that applies when allowing main shaft forge a knife is offset, thereby reduces the damage of main shaft bearing, prolongs the main shaft life-span.It is that some improvement have been done in main shaft inside.

Summary of the invention

The object of the present invention is to provide a kind of knife breaking left-hand thread device for main shaft of machine tool, it offsets the power that applies when main shaft is forged a knife effectively, thereby reduces the damage of main shaft bearing, prolongs the main shaft life-span.

For achieving the above object, the scheme that the present invention takes is: a kind of knife breaking left-hand thread device for main shaft of machine tool, be provided with main shaft and main spindle box, knife striking cylinder and piston thereof, be provided with a core, main shaft bearing, push rod in the main shaft, fix four guide pillars on the main spindle box, force bearing plate is enclosed within on the guide pillar, clamp is fixed on the force bearing plate, and main shaft stretches out force bearing plate and clamp, fixing rear end cap on the axle core, spring is inserted in guide pillar, nut is screwed into the guide pillar pressing spring, fixes four pull bars on the force bearing plate, and plate is fixedly connected on four pull bars, gusset piece is fixed on below the knife striking cylinder, and piston stretches out gusset piece.

This knife breaking left-hand thread device for main shaft of machine tool design is ingenious.When forging a knife, the piston slap push rod, and the reaction force that bump produces is born by force bearing plate, and force bearing plate floats on four guide pillars, whole device come-up, the spring compression, offset the power that applies when main shaft is forged a knife effectively, push rod moves down the realization main shaft and forges a knife, and has not had reaction force when main shaft is forged a knife, reduce the damage of main shaft bearing widely, prolonged the main shaft life-span.

Description of drawings

Fig. 1 is the structural representation of present embodiment in lathe.

Fig. 2 is an A part enlarged drawing among Fig. 1.

Among the figure: 1, main shaft, 2, main spindle box, 3, knife striking cylinder, 4, piston, 5, the axle core, 6, main shaft bearing, 7, push rod, 8, guide pillar, 9, force bearing plate, 10, clamp, 11, rear end cap, 12, spring, 13, nut, 14, pull bar, 15, gusset piece.

The specific embodiment

Below in conjunction with embodiment and accompanying drawing thereof the present invention is remake description.

Referring to Fig. 1 and Fig. 2, a kind of knife breaking left-hand thread device for main shaft of machine tool, be provided with main shaft 1 and main spindle box 2, knife striking cylinder 3 and piston 4 thereof, be provided with a core 5 in the main shaft 1, main shaft bearing 6, push rod 7, fix four guide pillars 8 on the main spindle box 2, force bearing plate 9 is enclosed within on the guide pillar 8, clamp 10 is fixed on the force bearing plate 9, and main shaft 1 stretches out force bearing plate 9 and clamp 10, fixing rear end cap 11 on the axle core 5, spring 12 is inserted in guide pillar 8, nut 13 is screwed into guide pillar 8 pressing springs 12, fixes the plate 15 that is fixedly connected on 14, four pull bars 14 of four pull bars on the force bearing plate 9, gusset piece 15 is fixed on below the knife striking cylinder 3, and piston 4 stretches out gusset piece 15.

Claims

1. knife breaking left-hand thread device for main shaft of machine tool, be provided with main shaft (1) and main spindle box (2), knife striking cylinder (3) and piston (4) thereof, be provided with a core (5) in the main shaft (1), main shaft bearing (6), push rod (7), it is characterized in that: fix four guide pillars (8) on the main spindle box (2), force bearing plate (9) is enclosed within on the guide pillar (8), clamp (10) is fixed on the force bearing plate (9), main shaft (1) stretches out force bearing plate (9) and clamp (10), axle core (5) is gone up fixedly rear end cap (11), spring (12) is inserted in guide pillar (8), nut (13) is screwed into guide pillar (8) pressing spring (12), fix four pull bars (14) on the force bearing plate (9), the plate (15) that is fixedly connected on four pull bars (14), gusset piece (15) is fixed on below the knife striking cylinder (3), and piston (4) stretches out gusset piece (15).