CN202779871U

CN202779871U - Fixture

Info

Publication number: CN202779871U
Application number: CN 201220356186
Authority: CN
Inventors: 蔡玉铨; 王松; 任艳强; 司古义; 罗文博
Original assignee: SHANDONG YUJIE BEARING MANUFACTURE CO Ltd
Current assignee: SHANDONG YUJIE BEARING MANUFACTURE CO Ltd
Priority date: 2012-07-23
Filing date: 2012-07-23
Publication date: 2013-03-13
Anticipated expiration: 2022-07-23

Abstract

A fixture comprises a horizontal sleeve coaxially and fixedly connected to a spindle of a device. A plurality of horizontal guide posts are disposed at the inner bottom of the sleeve. A chuck coaxial to the spindle of the device is movably sleeved on the guide posts. A pull bar penetrates through an axial central hole of the chuck and is connected with a screw penetrating an axial central hole of the sleeve in a threaded manner. A positioning disk coaxial to the spindle of the device is disposed at the outer ends of the guide posts, extending out of the chuck, through bolts. A circular groove is peripherally arranged on the circular outer end of the chuck. One side, close to the positioning disk, of the circular outer end of the chuck is evenly and peripherally provided with three sector notches communicated with the circular groove. Three clamp members are clamped in the circular groove through the sector notches. The clamp members are tightly connected with the chuck through a torsional spring arranged in the circular groove. The outer conical surface of each clamp member is in connection fit with the inner conical surface of an opening of the sleeve. The fixture allows for automatic pressure adjustment and is used for calibrating workpiece centers, precision in machining workpieces is effectively improved, and product quality is guaranteed.

Description

A kind of anchor clamps

Technical field:

The utility model relates to a kind of anchor clamps.

Background technology:

At present, when lathe processing casting workpiece, mostly adopt the scroll chuck fixation workpiece to process, because workpiece is cast body, the ratio of precision of self is relatively poor, much all has the quality problems such as self ellipse, triangular deformation, after this workpiece adopts scroll chuck to clamp, the problem that workpiece axle center and rotating shaft core decentraction occur easily causes the workpiece accuracy after the processing poor.When workpiece axle center and rotating shaft core decentraction, if the tension of chuck folder, can make the inside workpiece after the processing produce stress, this stress can be released when heat-treatment quenching is processed, thereby make workpiece produce larger triangular deformation, if process the workpiece of slim series then easier distortion has affected product quality.

The utility model content:

The utility model is in order to remedy the deficiencies in the prior art, a kind of anchor clamps are provided, it is simple in structure, easy for installation, can automatically adjust pressure according to self ellipse, the triangular deformation of workpiece, the check and correction workpiece centre effectively raises the machining accuracy of workpiece, guarantee the quality of product, solved problems of the prior art.

The utility model is to solve the problems of the technologies described above the technical scheme that adopts to be:

A kind of anchor clamps, comprise a horizontally disposed sleeve that is connected with the machine spindle concentric, in the sleeve inside bottom some horizontally disposed guide pillars are installed, the chuck of movable set one and machine spindle concentric on guide pillar, the threads of lead screw that the axle center hole and that one pull bar passes chuck passes the sleeve axle center hole is connected, guide pillar outer end outside stretching out chuck is by the positioning disk of bolt installation one with the machine spindle concentric, on the circular outer ends face of chuck, offer an annular groove along circumference, on the circular outer ends face of chuck, offer three sector notch that communicate with annular groove near positioning disk one side along even circumferential, three clamp bodies are in sector notch is installed on annular groove, one torsion spring that is located in the annular groove is connected clamp body with the chuck compression, the male cone (strobilus masculinus) of clamp body cooperates with the inboard taper seat of the nozzle of sleeve and joins, and the clamp body outer end outside stretching out sleeve is provided with a fan-shaped rocker piece.

The outer face of the clamp body outside stretching out sleeve is provided with a locating dowel, and a rocker piece is sleeved on the locating dowel and by bolt rocker piece is connected with clamp body.

By bolt two soft pawls are installed on the rocker piece surface relative with workpiece, two soft pawls are symmetrical arranged take the center line of the scalloped surface of rocker piece as axis, and soft pawl outer end face is provided with sawtooth.

The utility model adopts said structure, simple in structure, easy for installation, by adopting torsion spring to replace bolt that clamp body is fixed, when the stressed interior pressure clamping work pieces of clamp body male cone (strobilus masculinus), under the elastic reaction of torsion spring, can automatically adjust pressure according to self ellipse, the triangular deformation of workpiece, the check and correction workpiece centre, make workpiece axle center and rotating shaft core concentric, effectively raise the machining accuracy of workpiece, guaranteed the quality of product.

Description of drawings:

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

Fig. 2 is the right view of Fig. 1.

Fig. 3 is the A-A cutaway view of Fig. 1.

Fig. 4 is the right view of clamp body.

Fig. 5 is the right view of chuck.

Among the figure, 1, sleeve, 2, torsion spring, 3, clamp body, 4, rocker piece, 5, positioning disk, 6, chuck, 7, pull bar, 8, soft pawl, 9, annular groove, 10, sector notch, 11, leading screw, 12, guide pillar, 13, locating dowel.

The specific embodiment:

For clearly demonstrating the technical characterstic of this programme, below by the specific embodiment, and in conjunction with its accompanying drawing, the utility model is elaborated.

Shown in Fig. 1-5, a kind of anchor clamps, comprise a horizontally disposed sleeve 1 that is connected with the machine spindle concentric, in sleeve 1 inside bottom some horizontally disposed guide pillars 12 are installed, the chuck 6 of movable set one and machine spindle concentric on guide pillar 12, the leading screw 11 that the axle center hole and that one pull bar 7 passes chuck 6 passes sleeve 1 axle center hole is threaded, guide pillar 12 outer ends outside stretching out chuck 6 are by the positioning disk 5 of bolt installation one with the machine spindle concentric, on the circular outer ends face of chuck 6, offer an annular groove 9 along circumference, on the circular outer ends face of chuck 6, offer three sector notch 10 that communicate with annular groove 9 near positioning disk 5 one sides along even circumferential, three clamp bodies 3 are in sector notch 10 is installed on annular groove 9, one torsion spring 2 that is located in the annular groove 9 is connected clamp body 3 with chuck 6 compressions, the male cone (strobilus masculinus) of clamp body 3 cooperates with the inboard taper seat of the nozzle of sleeve 1 and joins, and clamp body 3 outer ends outside stretching out sleeve 1 are provided with a fan-shaped rocker piece 4.

The outer face of the clamp body 3 outside stretching out sleeve 1 is provided with a locating dowel 13, one rocker pieces 4 and is sleeved on the locating dowel 13 and by bolt rocker piece 4 is connected with clamp body 3.By bolt 8, two soft pawls 8 of two soft pawls are installed and are symmetrical arranged take the center line of the scalloped surface of rocker piece 4 as axis on rocker piece 4 surface relative with workpiece, soft pawl 8 outer end face are provided with sawtooth.Soft pawl 8 outer end face are designed to zigzag, and present line contact is changed in face contact in the past, are conducive to the periphery of clamping cast member, have strengthened the fixed effect to workpiece.Rocker piece 4 is all with bolts with soft pawl 8, has increased versatility, when the external diameter of processing work is changed, only needs to change corresponding soft pawl 8 or soft pawl 8 and rocker piece 4, can satisfy the workpiece demand, greatly facilitates operation, has saved the time.

During work, by leading screw 11 pulling pull bars 7, drive chuck 6, clamp body 3 move, and under the effect of the inboard taper seat of sleeve 1 nozzle, make the inside stressed extruding workpiece of male cone (strobilus masculinus) of clamp body 3, thereby with Workpiece clamping.Because clamp body 3 is fixing with chuck 6 by torsion spring 2, the screw that is different from is in the past fixed, when clamping, can automatically adjust pressure according to self ellipse, the triangular deformation of workpiece, the check and correction workpiece centre, make workpiece axle center and rotating shaft core concentric, effectively raise the machining accuracy of workpiece, guaranteed the quality of product.

The utility model does not describe part in detail, is those skilled in the art of the present technique's known technology.

Claims

1. anchor clamps, comprise a horizontally disposed sleeve that is connected with the machine spindle concentric, it is characterized in that: in the sleeve inside bottom some horizontally disposed guide pillars are installed, the chuck of movable set one and machine spindle concentric on guide pillar, the threads of lead screw that the axle center hole and that one pull bar passes chuck passes the sleeve axle center hole is connected, guide pillar outer end outside stretching out chuck is by the positioning disk of bolt installation one with the machine spindle concentric, on the circular outer ends face of chuck, offer an annular groove along circumference, on the circular outer ends face of chuck, offer three sector notch that communicate with annular groove near positioning disk one side along even circumferential, three clamp bodies are in sector notch is installed on annular groove, one torsion spring that is located in the annular groove is connected clamp body with the chuck compression, the male cone (strobilus masculinus) of clamp body cooperates with the inboard taper seat of the nozzle of sleeve and joins, and the clamp body outer end outside stretching out sleeve is provided with a fan-shaped rocker piece.

2. a kind of anchor clamps according to claim 1, it is characterized in that: the outer face of the clamp body outside stretching out sleeve is provided with a locating dowel, and a rocker piece is sleeved on the locating dowel and by bolt rocker piece is connected with clamp body.

3. a kind of anchor clamps according to claim 1 and 2, it is characterized in that: on the rocker piece surface relative with workpiece, by bolt two soft pawls are installed, two soft pawls are symmetrical arranged take the center line of the scalloped surface of rocker piece as axis, and soft pawl outer end face is provided with sawtooth.