CN2458111Y

CN2458111Y - Lathe chuck

Info

Publication number: CN2458111Y
Application number: CN 01217204
Authority: CN
Inventors: 吴建华
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-01-16
Filing date: 2001-01-16
Publication date: 2001-11-07
Anticipated expiration: 2011-01-16

Abstract

The utility model relates to a novel lathe chuck which comprises an intermediate shaft, a small screw, a spindle, a spring chuck provided with a groove and a thread sleeve fixed with a handle, wherein, the spindle is supported on a housing through a bearing; the thread sleeve forms a screwed connection with a right housing cover of the housing; the spring chuck forms a screw connection with the inside of the right end of the intermediate shaft; a chuck sleeve is sheathed on the spring chuck; the right end of the spring chuck is provided with a front cover; a preload sleeve is also sheathed on the spring chuck; a preload spring is arranged between the preload sleeve and the intermediate shaft; the inside of the front cover is fixed with an elastic pad. The utility model does not need to be stopped when workpieces are measured, loaded and unloaded, measuring precision is high, and in addition, the spindle can bear axial force; the utility model is especially suitable for instrument lathes.

Description

The novel lathe chuck

The utility model relates to a kind of lathe chuck.

My application number be 00220317.0 in first to file, designed a kind of lathe chuck, this lathe chuck has adopted collet and chuck nested structure, when operative employee's measuring workpieces and clamping workpiece, need not lathe is stopped, reduced operative employee's labour intensity, the part but this lathe chuck still comes with some shortcomings: main shaft can not independently bear axial force, must rely on the headstock main shaft just can bear axial force, in addition, collet does not have the pretension effect, easily causes the relative motion between workpiece and collet, thereby influence certainty of measurement, lead certainty of measurement and reduce.

The purpose of this utility model provides a kind of not only the measurement and dispense with parking during workpiece loading and unloading, and certainty of measurement height, main shaft can bear the novel lathe chuck of axial force.

The technical scheme that realizes above-mentioned purpose is: a kind of novel lathe chuck, comprise jackshaft, primary nut, main shaft, collet and the swivel nut that is fixed with handle with groove, main shaft is bearing on the casing by bearing, the left end of casing has left case lid, the right-hand member of casing has right case lid, swivel nut is threaded with the right case lid of casing, and prop up bearing, collet is connected with jackshaft right-hand member inside thread, is set with the chuck cover on the collet, and this chuck cover is fixedlyed connected with the main shaft right-hand member by key, the collet right-hand member has protecgulum, this protecgulum is sleeved on the swivel nut, and fixedlys connected with swivel nut, and the bearing of casing upper support main shaft is a thrust bearing; Also be set with pre-tightening sleeve on the collet, the thrust bearing of band little spring is installed between this pre-tightening sleeve and the chuck cover, this little spring is connected with pre-tightening sleeve; Has preloading spring between pre-tightening sleeve and the jackshaft; The protecgulum inboard is fixed with elastomeric pad, and this elastomeric pad is between protecgulum and collet.

After adopting technique scheme, the bearing of casing upper support main shaft is a thrust bearing, thereby makes main shaft can independently bear axial force.In addition owing to also be set with pre-tightening sleeve on the collet, the thrust bearing of band little spring is installed between this pre-tightening sleeve and the chuck cover, has preloading spring between pre-tightening sleeve and the jackshaft, because the effect of preloading spring, during measuring workpieces, pre-tightening sleeve can not be unclamped, pre-tightening sleeve produces pretightning force to collet, thereby can avoid the relative motion between workpiece and the collet, improve certainty of measurement.Adopt little spring, the thrust bearing that links to each other with little spring is located preferably.

Just the utility model is described in further detail below in conjunction with accompanying drawing and enforcement.

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the structural representation of Fig. 1 medi-spring chuck;

Fig. 3 is the A-A cross-sectional schematic of Fig. 2.

As Fig. 1,2, shown in 3, a kind of novel lathe chuck, comprise jackshaft 21, primary nut 20, main shaft 17, collet 5 and the swivel nut 2 that is fixed with handle 3 with groove 5-1, main shaft 17 is bearing on the casing 22 by bearing 16, the left end of casing 22 has left case lid 19, the right-hand member of casing 22 has right case lid 15, swivel nut 2 is threaded with the right case lid 15 of casing 22, big nut 18 is sleeved on the main shaft 17, and prop up bearing 16, collet 5 is connected with jackshaft 21 right-hand member inside threads, is set with chuck cover 9 on the collet 5, and this chuck cover 9 is connected with main shaft 17 right-hand members by key 14, collet 5 right-hand members have protecgulum 4, this protecgulum 4 is sleeved on the swivel nut 2, and fixedlys connected by screw 11 with swivel nut 2, and the bearing 16 of casing 22 upper support main shafts 17 is an entad ball thrust bearing (7000 series) of circular cone; Also be set with pre-tightening sleeve 6 on the collet 5, the thrust bearing 7 of band little spring 12 is installed between this pre-tightening sleeve 6 and the chuck cover 9, this little spring 12 is connected with pre-tightening sleeve 6; Has preloading spring 13 between pre-tightening sleeve 6 and the jackshaft 21; Protecgulum 4 inboards are fixed with elastomeric pad 8, and this elastomeric pad 8 is between protecgulum 4 and collet 5.

As shown in Figure 1, be fixed with lifting bolt 1 on the casing 22, this is for the ease of lathe chuck is installed.

The course of work of the present utility model is as follows: when needing clamping work pieces, operating grip 3, swivel nut 2 is moved to right, the plain thrust bearing 10 that swivel nut 2 promotions are supported it moves to right, and plain thrust bearing 10 promotes chuck cover 9 again and moves to right, chuck cover 9 fastening spring chuck 5 when moving to right, and the groove 5-1 of collet 5 is narrowed down, thereby the protecgulum 4 that collet 5 clamping work pieces, swivel nut 2 also promote to fixedly connected with it moves to right, and makes the elastomeric pad 8 of protecgulum 4 inboards break away from collet 5.At this moment, if main shaft 17 runnings promptly can drive 9 runnings of chuck cover, chuck cover 9 drives collet 5 runnings, and collet 5 drives the workpiece running.When needs are measured, operating grip 3, swivel nut 2 is moved to left, the protecgulum 4 that swivel nut 2 bands are fixedlyed connected with it moves to left, protecgulum 4 promotes plain thrust bearing 10 and moves to left, plain thrust bearing 10 promotes chuck cover 9 and moves to left, chuck cover 9 promotes thrust bearing 7 and moves to left, and at this moment, pre-tightening sleeve 6 still is the pretension state, the elastomeric pad 8 of protecgulum 4 inboards moves to left with protecgulum 4, contact also props up collet 5 outer faces, and elastomeric pad 8 shuts down collet 5, because the effect of pre-tightening sleeve 6 makes workpiece and collet 5 no relative motions, workpiece and jackshaft 21 also shut down, and get final product measuring workpieces this moment.When workpiece loading and unloading, operating grip 3 makes swivel nut 2 continue to move to left, and chuck cover 9 continues to promote thrust bearing 7 and moves to left, and overcome the active force of little spring 12, the active force that promotion pre-tightening sleeve 6 overcomes preloading spring 13 moves to left, and makes pre-tightening sleeve 6 trip spring chucks 5, thereby makes the groove 5-1 of collet 5 become big, make collet 5 unclamp workpiece, meanwhile, the elastomeric pad 8 of protecgulum 4 inboards continues again to move to left with protecgulum 4, holddown spring chuck 5 outer faces, at this moment, get final product workpiece loading and unloading.

The utility model is specially adapted to instrument lathe because main shaft can independently bear axial force, is applicable to that also general big lathe is measured, workpiece loading and unloading does not stop.

Claims

1, a kind of novel lathe chuck, comprise jackshaft (21), primary nut (20), main shaft (17), have the collet (5) of groove (5-1) and be fixed with the swivel nut (2) of handle (3), main shaft (17) is bearing on the casing (22) by bearing (16), the left end of casing (22) has left case lid (19), the right-hand member of casing (22) has right case lid (15), swivel nut (2) is threaded with the right case lid (15) of casing (22), big nut (18) is sleeved on the main shaft (17), and prop up bearing (16), collet (5) is connected with jackshaft (2) right-hand member inside thread, be set with chuck cover (9) on the collet (5), this chuck cover (9) is connected with main shaft (17) right-hand member by key (14), collet (5) right-hand member has protecgulum (4), this protecgulum (4) is sleeved on the swivel nut (2), and fixedly connected with swivel nut (2), it is characterized in that:

The bearing (16) of a, casing (22) upper support main shaft (17) is a thrust bearing;

Also be set with pre-tightening sleeve (6) on b, the collet (5), the thrust bearing (7) of band little spring (12) is installed between this pre-tightening sleeve (6) and the chuck cover (9), this little spring (12) is connected with pre-tightening sleeve (6);

Has preloading spring (13) between c, pre-tightening sleeve (6) and the jackshaft (21);

D, protecgulum (4) inboard are fixed with elastomeric pad (8), and this elastomeric pad (8) is positioned between protecgulum (4) and the collet (5).