CN2124095U

CN2124095U - Four-pawl self-centring universal chuck for machine tool

Info

Publication number: CN2124095U
Application number: CN 92211758
Authority: CN
Inventors: 扈传胜
Original assignee: WEIFANG DIESEL ENGINE FACTORY
Current assignee: WEIFANG DIESEL ENGINE FACTORY
Priority date: 1992-05-03
Filing date: 1992-05-03
Publication date: 1992-12-09

Abstract

The utility model relates to a four-jaw and self-centring universal chuck for a machine tool, which belongs to the technical field of fastener, and comprises a chuck body, a conical gear, scrolls, dog screws, chuck jaws and clamping jaws. When the utility model is adopted, four 'H-shaped' grooves which are symmetrial and are in nonuniform distribution are arranged at the front end face of the chuck body with a shaft line as a center, and chuck jaws and clamping jaws with unique structure are also arranged on the front end face of the chuck body. When work pieces like ellipse, rectangle or diamond, etc., are clamped, the clamping force of the chuck jaws and the clamping jaws to the work pieces is fully uniform, so the processing precision of the processed work pieces can be enhanced.

Description

Four-pawl self-centring universal chuck for machine tool

The utility model belongs to technical field of fastening.

In machining; need fixedly work piece of a kind of clamping device; the orthogonal four paws self-centering chuck of Shanghai machine tool accessories two factories production at present; be to drive parcel by the bevel gear on the rotating disk body to rotate; claw on the disk body front end face is moved around in " worker " shape groove; thereby reach the purpose that clamps or unclamp work piece; adopt this orthogonal four paws self-centering chuck; the ellipse garden of clamping shape; when rectangle or rhombus work piece; its four paws is inconsistent to the clamping force of work piece; so to ellipse garden shape; the clamping of rectangle or rhombus work piece is unreliable, thereby has influenced the machining accuracy of work piece.

The purpose of this utility model is a kind of clamping device of design, with this clamping device ellipse garden of clamping shape, rectangle or rhombus work piece easily and reliably.

The utility model comprises disk body, bevel gear passes the outer garden of disk body and is sleeved on the engagement of the parcel on the garden in the disk body rear end, and be inserted on the interior garden, be connected with the dog screw that contacts with bevel gear top outside in the garden, the uniform screw that connects main shaft is arranged on the end face of outer garden, the Nei Yuan outer face tightens intrinsic gland, the disk body front end face is that the center is provided with symmetry but four not uniform " worker " shape grooves with the axis, wherein in one group of corresponding " worker " shape groove claw is housed, in another group corresponding " worker " shape groove jaw is housed.

Because the utility model is that symmetry has been adopted but four not uniform " worker " shape grooves in the center with the axis at the disk body front end face, claw and the jaw that clamping area is the inclined-plane is housed in " worker " shape groove, when the ellipse garden of clamping shape, rectangle or rhombus work piece, clamping force to work piece is in full accord, very convenient reliable when clamping, thus the machining accuracy of work piece improved.

Describe concrete structure of the present utility model in detail below in conjunction with drawings and Examples.

Accompanying drawing has provided embodiment of the present utility model, wherein

Fig. 1 is the front view of first embodiment;

Fig. 2 is the right cutaway view of Fig. 1 along the B-B line;

Fig. 3 is the partial sectional view of Fig. 2 along the A-A line;

Fig. 4 is the front view of embodiment disk body;

Fig. 5 is the cutaway view of Fig. 4 along C-C line " worker " shape groove;

Fig. 6 is the front view of second embodiment;

Fig. 7 is that the D of second embodiment claw is to revolved view;

Fig. 8 is that the E of second embodiment jaw is to revolved view;

Disk body (1), bevel gear (2) passes outer garden (8) and parcel (3) engagement that is sleeved on disk body (1) the rear end Nei Yuan (9), and be inserted on the interior garden (9), be connected with the dog screw (4) that contacts with bevel gear (2) top outside in garden (8), the uniform screw (13) that connects main shaft is arranged on outer garden (8) end face (11), outer face, interior garden (9) (10) tightens intrinsic gland (5), disk body (1) front end face is that the center is provided with symmetry but not uniform four " worker " shape grooves (12) with the axis, (19), (20) and (21), " worker " shape groove (12) and (20), (21) and the angle between (19) be 60 the degree, " worker " shape groove (20) and (19), (12) and the angle between (21) be 120 the degree, wherein in one group of corresponding " worker " shape groove (12) and (19) claw (7) is housed, in another group corresponding " worker " shape groove (20) and (21) jaw (25) is housed, angle between its clamping area of claw (7) (17) and side (23) is 110 degree～130 degree, present embodiment adopts 120 degree, angle between its clamping area of jaw (25) (22) and side (24) is 110 degree～130 degree, and present embodiment adopts 120 degree.

During use, rotating parachute gear (2) drives claw (7) by parcel (3) and jaw (25) moves around, thus clamping or unclamp ellipse garden shape work piece (14).

Fig. 6 has provided the structural representation of second embodiment, angle between claw (7) clamping area (18) and side (26) is 110 degree～130 degree, present embodiment adopts 120 degree, clamping area (18) is vertical mutually with locating surface (15), angle between its clamping area of jaw (25) (28) and side (27) is 110 degree～130 degree, present embodiment adopts 120 degree, clamping area (28) is vertical mutually with locating surface (16), its advantage is that the locating surface (15) and (16) that increase make the location of work piece convenient, and other is identical with first embodiment.

Claims

1, a kind of lathe four paws self-centering universal chuck, comprise disk body (1), bevel gear (2) passes parcel (3) engagement on outer garden (8) and suit disk body (1) the rear end Nei Yuan (9), and be inserted on the interior garden (9), be connected with the dog screw (4) that contacts with bevel gear (2) top outside in garden (8), the uniform screw (13) that connects main shaft is arranged on garden (8) end face (11) outside; Outer face, interior garden (9) (10) tightens intrinsic gland (5), it is characterized in that disk body (1) front end face is that the center is provided with symmetry but not uniform four " worker " shape grooves (12), (19), (20) and (21) with the axis, wherein in one group of corresponding " worker " shape groove (12) and (19) claw (7) is housed, in another group corresponding " worker " shape groove (20) and (21) jaw (25) is housed.

2, lathe according to claim 1 is characterized in that with four paws self-centering universal chuck the angle between its clamping area of described claw (7) (17) and side (23) is 110 degree～130 degree.

3, lathe according to claim 1 is characterized in that with four paws self-centering universal chuck the angle between its clamping area of described jaw (25) (22) and side (24) is 110 degree～130 degree.

4, lathe according to claim 1 is characterized in that with four paws self-centering universal chuck the angle between its clamping area of described claw (7) (18) and side (26) is 110 degree～130 degree.Clamping area (18) is vertical mutually with locating surface (15).

5, lathe according to claim 1 is characterized in that with four paws self-centering universal chuck the angle between its clamping area of described jaw (25) (28) and side (27) is 110 degree～130 degree, and clamping area (28) is vertical mutually with locating surface (16).