CN2082650U

CN2082650U - Rapid four-jaw independent chuck

Info

Publication number: CN2082650U
Application number: CN 90225438
Authority: CN
Inventors: 何俊; 李松顺; 郭彦文
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-11-28
Filing date: 1990-11-28
Publication date: 1991-08-14

Abstract

The utility model relates to a quick-action chuck, comprising a chuck body, a screw rod, an intermediary thread nut, clamping jaws and a safety clutch, wherein, the outside diameter of the screw rod and the inside diameter of the intermediary thread nut symmetrically remove parts of screw thread. When the screw thread surface of the screw rod falls on the intermediary thread nut without the screw thread surface, the intermediary thread nut can slide quickly together with the clamping jaws along the screw rod. The screw rod rotates 90 DEG, which causes the safety clutch and the clamping jaws to rotate 90 DEG, and the screw rod, the safety clutch and the clamping jaws are connected as integration. A user continuously rotates the screw rod, the intermediary thread nut is driven for rotating, so the clamping jaws go ahead, and work pieces can be clamped further. The utility model has the outstanding advantages that the clamping is quick and firm, the operation is convenient, and the structure is simple.

Description

Rapid four-jaw independent chuck

The utility model belongs to mechanical engineering field.

Four-jaw chuck is the common tool of large and medium-sized engine lathe and outer circular end grinding machine in the machining, its feature is the claw single action, can adjust respectively, the workpiece irregular with clamping or degree of precision requires, its outstanding shortcoming is that claw is along the leading screw screw movement, be subjected to the restriction of lead angle, efficient is very low; The use of advanced snap-action chuck such as air spider, oild chuck need have supporting air pressure, hydraulic pressure supply again, and its utilization scope is restricted greatly like this.

The purpose of this utility model is to overcome above-mentioned deficiency, the quick four-jaw chuck a kind of simple in structure of design.

Concrete structure of the present utility model such as accompanying drawing 1, accompanying drawing 2 cuts open figure for A-A, the B-B among Fig. 1.

This chuck is by body 1, four of claw 4() and by leading screw 2, two of insurance clutch 5(), the quick mechanism of intermediary's screw 3 combinations forms. It is characterized in that:

Be the Quick-clamped of optional position in the formation scope, leading screw external diameter, the symmetrical removal of intermediary's screw internal diameter part screw thread (or straight trough), intermediary's screw external diameter are still with claw and are threaded; The insurance clutch core is with the flat square hole 6 identical shaped with the leading screw cross section, thereby claw, intermediary's screw, insurance clutch can freely be advanced and retreat along the no line part of leading screw. Intermediary screw two ends with the insurance clutch for being threaded, and along a part of room that forms of garden Zhou Fangxiang excision separately, remainder forms clutch claw 7, when pushing away, when drawing claw fast near surface of the work, make leading screw turn to 90 °, the line of leading screw (groove) snaps in intermediary's screw line (groove), simultaneously drive insurance clutch also turns to 90 ° and also produces simultaneously following two actions: one makes insurance clutch screw thread continue to screw on 1/4th along intermediary's screw nut and encloses, play the safety effect that intermediary's screw is connected with leading screw, prevent that being connected because of vibration or impacting between leading screw and the intermediary screw from falling back on no line position and make and clamp inefficacy. Its two insurances clutch claw is top intermediary screw along the room. Continue rotating threaded shaft and then make the insurance clutch drive intermediary's screw rotation (this moment leading screw, insurance clutch, intermediary's screw synchronous), intermediary's screw drives the claw rapid clamping work pieces of advancing and retreat. After the completion of processing, unclamp workpiece, leading screw to centre position is namely restored to the original state. Because the existence of quick mechanism can draw claw speed to the chuck outer radius, rotate claw and intermediary screw are broken away from, take off rapidly the claw maintenance and reset, can make between the keyway of claw and chuck body to keep clean, nimbly and freely. Through test, this programme improves greatly than existing chuck efficient, and is respond well.

Claims

Quick four-jaw chuck, comprise chuck body 1, claw 4 (four), leading screw 2, insurance clutch 5 (two), intermediary's screw 3 is characterized in that: leading screw 2 external diameters, intermediary's screw 3 internal diameters symmetry is removed part screw thread (or straight trough) intermediary screw 3 and claw 4 for being threaded, the center have with the insurance clutch 5 in identical shaped hole 6, leading screw 2 cross sections and intermediary screw two ends for being threaded, and along a part of room that forms of garden Zhou Fangxiang excision separately, remainder forms clutch claw 7.