CN210160435U

CN210160435U - Three-jaw chuck fixing device with offset positioning mechanism

Info

Publication number: CN210160435U
Application number: CN201921067169.3U
Authority: CN
Inventors: 罗石红
Original assignee: Tianjin Dongsheng Weiye Precision Mould Co Ltd
Current assignee: Tianjin Dongsheng Weiye Precision Mould Co Ltd
Priority date: 2019-07-09
Filing date: 2019-07-09
Publication date: 2020-03-20
Anticipated expiration: 2029-07-09

Abstract

The utility model provides a three-jaw chuck fixing device with an offset positioning mechanism, which comprises a drilling and milling workbench, wherein three transversely arranged T-shaped grooves are arranged at the upper end of the drilling and milling workbench, a three-jaw chuck body is arranged at the upper side of the drilling and milling workbench, a taper tooth hole is arranged at the front end of the three-jaw chuck body, a clamping jaw is slidably connected at the upper end of the three-jaw chuck body, screw rods are arranged at the left side and the right side of the three-jaw chuck body, the lower ends of the screw rods are slidably connected with the inner wall of the T-shaped groove, a chuck pressing plate is sleeved at the upper ends of the screw rods, a nut is in threaded connection with, the positions of the screws are determined by clamping the two ends of the offset positioning base frame to the circular arcs of the three-jaw chuck body, and the deviation of the two screws in the positioning with the three-jaw chuck body and the offset of the chuck pressing plate on the three-jaw chuck body are corrected, so that the fixing effect of the chuck pressing plate on the three-jaw chuck body is improved.

Description

Three-jaw chuck fixing device with offset positioning mechanism

Technical Field

The utility model relates to a mould processing technology field specifically provides a three-jaw chuck fixing device with skew positioning mechanism.

Background

The three-jaw chuck is a machine tool accessory for clamping and positioning a workpiece by utilizing radial movement of three movable jaws uniformly distributed on a chuck body, and consists of the chuck body, the movable jaws and a jaw driving mechanism. The lower surfaces of the guide parts of the three jaws on the three-jaw chuck are provided with threads which are meshed with the plane threads on the back surface of the disc-shaped bevel gear, when a spanner is used for rotating the bevel pinion through the square hole, the disc-shaped gear rotates, and the plane threads on the back surface simultaneously drive the three jaws to approach to the center or withdraw from the center so as to clamp workpieces with different diameters. Three reverse claws are replaced on the three claws for installing a workpiece with a larger diameter. The self-centering accuracy of the three-jaw chuck is 0.05-0.15 mm.

The precision of processing the die workpiece by using the three-jaw chuck is influenced by the manufacturing precision of the chuck and the abrasion condition after the use, and meanwhile, in the fixing process of the three-jaw chuck to the die workpiece, the fine deviation can also cause the error of die processing, thereby leading the quality of an extrusion piece manufactured by the die to be poor, the existing chuck fixing device carries out auxiliary fixing on the three-jaw chuck through a chuck pressing plate and a screw, but the mode of carrying out auxiliary fixing on the three-jaw chuck carries out the positioning process on the screw, the deviation of the two screws in the positioning with the chuck body and the deviation of the pressing plate on the chuck body are easy to occur, thereby leading the fixing effect of the fixing device on the chuck body to be poor, leading the occurrence of the deviation condition of the three-jaw chuck, and influencing the processing effect on the die workpiece.

Accordingly, there is a need in the art for a three-jaw chuck fixture having an offset positioning mechanism that addresses the above-mentioned problems.

SUMMERY OF THE UTILITY MODEL

It is an object of the present invention to provide a three-jaw chuck fixing device with an offset positioning mechanism that overcomes or at least alleviates at least one of the above-mentioned problems of the prior art.

In order to realize the purpose, the utility model provides a three-jaw chuck fixing device with an offset positioning mechanism, which comprises a drilling and milling worktable, wherein the upper end of the drilling and milling worktable is provided with three T-shaped grooves which are transversely arranged, the upper side of the drilling and milling worktable is provided with a three-jaw chuck body, the front end of the three-jaw chuck body is provided with a taper tooth hole, the upper end of the three-jaw chuck body is slidably connected with a clamping jaw, the left side and the right side of the three-jaw chuck body are provided with screw rods, the lower ends of the screw rods are slidably connected with the inner wall of the T-shaped groove, the upper ends of the screw rods are sleeved with a chuck pressing plate, the upper ends of the screw rods are in threaded connection with nuts, one side of the screw rods, which is far away from the three-jaw chuck body, is provided with a fulcrum shaft sleeve, the lower ends of the fulcrum shaft sleeve are slidably connected with, the utility model discloses a well core rod, including well core rod, base rod, screw rod, base bearing inner ring wall fixed connection, base bearing outer end fixedly connected with location benchmark piece, the location benchmark piece passes through the base bearing and is connected with well core rod rotation, be equipped with the skew location bed frame between location benchmark piece and the screw rod, skew location bed frame and well core rod sliding connection, horizontal locating hole has all been seted up at both ends about the location benchmark piece, the skew location bed frame is kept away from well core rod one end and is matchd with horizontal locating hole.

In the preferred technical scheme of above-mentioned structure, the welding of screw rod and fulcrum axle sleeve lower extreme has square spacer, square spacer and T type groove phase-match.

In the preferred technical scheme of above structure, the chuck clamp plate is kept away from three-jaw chuck body one end and is seted up the grafting circular slot, grafting circular slot and fulcrum ejector pin upper end phase-match, fulcrum ejector pin upper end offsets with the chuck clamp plate through the grafting circular slot.

In the preferable technical scheme of the structure, two operation rotary grooves are drilled at one end of the fulcrum ejector rod close to the chuck press plate, and the two operation rotary grooves are respectively positioned at the front side and the rear side of the fulcrum ejector rod.

In the preferred technical scheme of above-mentioned structure, be equipped with compression spring between location reference piece and the skew location bed frame, compression spring cup joints with well core rod, the compression spring left and right ends offsets with location reference piece and skew location bed frame respectively.

Those skilled in the art can understand, in the preferred technical scheme of the utility model, through the chuck clamp plate of addding in the three-jaw chuck body left and right sides, screw rod and fulcrum ejector pin are fixed three-jaw chuck body, when confirming the position of chuck clamp plate, make the location reference piece rotate around well core rod and be in the horizontality, to keeping away from screw rod one side promotion skew location bed frame, the both ends that make the skew location bed frame are close to the left and right sides of three-jaw chuck body, through the joint of skew location bed frame both ends to the circular arc department of three-jaw chuck body, confirm the position of screw rod, rectify deviation and the skew of chuck clamp plate on three-jaw chuck body of two screw rods in the location with three-jaw chuck body, thereby promote the fixed effect of chuck clamp plate to three-jaw chuck body.

Drawings

Fig. 1 is a front view of the present invention;

FIG. 2 is a schematic view of the structure at A in FIG. 1;

fig. 3 is a left side view of the positioning reference piece portion of the present invention;

fig. 4 is a plan view of the present invention.

Reference numerals:

the device comprises a drilling and milling workbench 1, a three-jaw chuck body 2, jaws 3, a 4-taper tooth hole, a 5-chuck pressing plate, a 6-screw rod, a 7-nut, an 8-fulcrum shaft sleeve, a 9-fulcrum ejector rod, a 10-center rod, a 11-substrate bearing, a 12-positioning reference sheet, a 13-offset positioning pedestal and a 14-compression spring.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and are not limiting of the invention. It should be noted that, for convenience of description, only the parts related to the present invention are shown in the drawings.

The directional terms used in the following description are used as directional terms in the drawings and are not intended to limit the specific structure of embodiments of the present invention. In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as either a fixed connection, a removable connection, or an integral connection; can be directly connected or indirectly connected. The specific meaning of the above terms in the present invention can be understood as the case may be, by those of ordinary skill in the art.

In the description of the present invention, it is to be understood that the terms "central", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore are not to be construed as limiting the scope of the invention.

The utility model provides a three-jaw chuck fixing device with skew positioning mechanism for in carrying out the installation to chuck fixing device, rectify two screw rods 6 deviation and the skew of chuck clamp plate 5 on three-jaw chuck body 2 in the location with three-jaw chuck body 2, thereby promote chuck clamp plate 5 to the fixed effect of three-jaw chuck body 2, and then promote the effect that three-jaw chuck body 2 fixed and processed the mould work piece.

Referring to fig. 1, a three-jaw chuck fixing device with an offset positioning mechanism comprises a drilling and milling workbench 1, three transversely arranged T-shaped grooves are formed at the upper end of the drilling and milling workbench 1, a three-jaw chuck body 2 is arranged at the upper side of the drilling and milling workbench 1, a tapered tooth hole 4 is formed at the front end of the three-jaw chuck body 2, jaws 3 are slidably connected to the upper end of the three-jaw chuck body 2, screw rods 6 are arranged at the left side and the right side of the three-jaw chuck body 2, the lower end of each screw rod 6 is slidably connected with the inner wall of the T-shaped groove, a chuck pressing plate 5 is sleeved at the upper end of each screw rod 6, a nut 7 is threadedly connected to the upper end of each screw rod 6, a fulcrum shaft sleeve 8 is arranged at one side of the screw rod 6 away from the three-jaw chuck body 2, the lower end of the fulcrum shaft sleeve 8 is slidably connected with the inner wall of, limiting the upward movement of a chuck pressing plate 5, wherein the lower end of the chuck pressing plate 5 abuts against the upper sides of the left end and the right end of a three-jaw chuck body 2, a nut 7 is used as a fulcrum, screwing a fulcrum ejector rod 9 to enable the upper end of the fulcrum ejector rod 9 to abut against the lower end of the chuck pressing plate 5, so as to fix the three-jaw chuck body 2, one end of a screw rod 6, which is close to the three-jaw chuck body 2, is fixedly connected with a central rod 10, one end of the central rod 10, which is far away from the screw rod 6, is sleeved with a substrate bearing 11, the central rod 10 is fixedly connected with the inner annular wall of the substrate bearing 11, the outer end of the substrate bearing 11 is fixedly connected with a positioning reference sheet 12, the positioning reference sheet 12 is rotatably connected with the central rod 10 through the substrate bearing 11, the positioning reference sheet 12 can rotate on the central rod 10 through the substrate bearing 11, so that, horizontal positioning holes are formed in the upper end and the lower end of the positioning reference piece 12, one end of the offset positioning base frame 13, which is far away from the center rod 10, is matched with the horizontal positioning holes, the positioning reference piece 12 is rotated to be in a horizontal state, the offset positioning base frame 13 is pushed to slide in the positioning reference piece 12, two ends of the offset positioning base frame 13 are connected with the circular arc part of the three-jaw chuck body 2, the deviation of the two screw rods 6 in the positioning process of the three-jaw chuck body 2 and the offset of the chuck pressing plate 5 on the three-jaw chuck body 2 are corrected, and therefore the fixing effect of the chuck pressing plate 5 on the.

In this embodiment, the welding of

screw rod

6 and 8 lower extremes of fulcrum axle sleeve has square spacer, square spacer and T type groove phase-match, be convenient for chuck clamp plate 5 to slide on drilling and milling workstation 1 and remove, chuck clamp plate 5 is kept away from 2 one end of three-jaw chuck body and has been seted up the grafting circular slot, grafting circular slot and 9 upper end phase-matches of fulcrum ejector pin, 9 upper ends of fulcrum ejector pin offset through grafting circular slot and chuck clamp plate 5, be convenient for make fulcrum ejector pin 9 rotate on fulcrum axle sleeve 8, upwards promote chuck clamp plate 5, make chuck clamp plate 5 keep away from 9 one end of fulcrum ejector pin and push down three-jaw chuck body 2, the completion is fixed to three-jaw chuck body 2.

The end of the fulcrum ejector rod 9 close to the chuck pressing plate 5 is provided with two operation rotary grooves, the two operation rotary grooves are respectively positioned at the front side and the rear side of the fulcrum ejector rod 9, and the fulcrum ejector rod 9 on the fulcrum shaft sleeve 8 is convenient to rotate through the operation rotary grooves additionally arranged on the fulcrum ejector rod 9, so that the fulcrum ejector rod 9 moves upwards in the fulcrum shaft sleeve 8.

Be equipped with compression spring 14 between location reference piece 12 and the skew location bed frame 13, compression spring 14 cup joints with well core rod 10, and both ends offset with location reference piece 12 and skew location bed frame 13 respectively about compression spring 14, through the compression spring 14 who adds between location reference piece 12 and skew location bed frame 13, are convenient for make skew location bed frame 13 under normal condition, have the trend of keeping away from location reference piece 12 one side and removing.

Those skilled in the art can understand, in the preferred technical scheme of the utility model, through the chuck clamp plate 5 that adds in the left and right sides of three-jaw chuck body 2, screw rod 6 and fulcrum ejector pin 9 are fixed three-jaw chuck body 2, when confirming the position of chuck clamp plate 5, make location reference piece 12 rotate around well core rod 10 and be in the horizontality, to keeping away from screw rod 6 one side promotion skew location bed frame 13, the left and right sides that makes the both ends of skew location bed frame 13 be close to three-jaw chuck body 2, through the joint of skew location bed frame 13 both ends to three-jaw chuck body 2's circular arc department, confirm the position of screw rod 6, rectify two screw rod 6 deviation and the skew of chuck clamp plate 5 on three-jaw chuck body 2 in the location with three-jaw chuck body 2, thereby promote the fixed effect of chuck clamp plate 5 to three-jaw chuck body 2.

The above description is only the preferred embodiment of the present invention; the scope of the present invention is not limited thereto. Any person skilled in the art should also be able to cover the technical scope of the present invention by replacing or changing the technical solution and the improvement concept of the present invention with equivalents and modifications within the technical scope of the present invention.

Claims

1. A three-jaw chuck fixing device with an offset positioning mechanism comprises a drilling and milling workbench (1), wherein three transversely arranged T-shaped grooves are formed in the upper end of the drilling and milling workbench (1), a three-jaw chuck body (2) is arranged on the upper side of the drilling and milling workbench (1), and the three-jaw chuck fixing device is characterized in that a taper tooth hole (4) is formed in the front end of the three-jaw chuck body (2), a clamping jaw (3) is connected to the upper end of the three-jaw chuck body (2) in a sliding manner, screw rods (6) are arranged on the left side and the right side of the three-jaw chuck body (2), the lower end of each screw rod (6) is connected with the inner wall of the T-shaped groove in a sliding manner, a chuck pressing plate (5) is sleeved on the upper end of each screw rod (6), a nut (7) is connected to the upper end of each screw rod (6) in a threaded manner, a fulcrum shaft sleeve (, the upper end of the fulcrum shaft sleeve (8) is in threaded connection with a fulcrum ejector rod (9), the upper end of the fulcrum ejector rod (9) is abutted against the chuck pressing plate (5), the screw rod (6) is close to one end of the three-jaw chuck body (2) and is fixedly connected with a center rod (10), one end, far away from the screw rod (6), of the center rod (10) is sleeved with a substrate bearing (11), the center rod (10) is fixedly connected with the inner ring wall of the substrate bearing (11), the outer end of the substrate bearing (11) is fixedly connected with a positioning reference sheet (12), the positioning reference sheet (12) is rotatably connected with the center rod (10) through the substrate bearing (11), an offset positioning base frame (13) is arranged between the positioning reference sheet (12) and the screw rod (6), the offset positioning base frame (13) is slidably connected with the center rod (10), and horizontal positioning holes are formed in the, and one end of the offset positioning base frame (13) far away from the central rod (10) is matched with the horizontal positioning hole.

2. The three-jaw chuck fixing device with the offset positioning mechanism is characterized in that a square positioning piece is welded at the lower ends of the screw rod (6) and the fulcrum shaft sleeve (8), and the square positioning piece is matched with the T-shaped groove.

3. The three-jaw chuck fixing device with the offset positioning mechanism is characterized in that one end of the chuck pressing plate (5) far away from the three-jaw chuck body (2) is provided with an insertion circular groove, the insertion circular groove is matched with the upper end of the fulcrum ejector rod (9), and the upper end of the fulcrum ejector rod (9) is abutted against the chuck pressing plate (5) through the insertion circular groove.

4. The fixing device of the three-jaw chuck with the offset positioning mechanism according to claim 1, wherein the fulcrum ejector rod (9) has two operating rotary slots cut at one end close to the chuck press plate (5), and the two operating rotary slots are respectively located at the front side and the rear side of the fulcrum ejector rod (9).

5. The three-jaw chuck fixing device with the offset positioning mechanism is characterized in that a compression spring (14) is arranged between the positioning reference sheet (12) and the offset positioning base frame (13), the compression spring (14) is sleeved with the central rod (10), and the left end and the right end of the compression spring (14) are respectively abutted against the positioning reference sheet (12) and the offset positioning base frame (13).