CN219444363U - Chuck maintenance device - Google Patents

Abstract

The utility model relates to the technical field of machining equipment, in particular to a chuck maintenance device. Including the ring body, be provided with a plurality of first screw holes on the ring body about its axis symmetry, first bolt and first screw hole threaded connection, be provided with three arm that stretches out about its axis symmetry on the ring body outer circumference, the one end sliding connection that stretches out the arm and keep away from the ring body has the tight mechanism that colludes that is used for hooking the jack catch and keeps away from disk body one end, the one end that colludes tight mechanism is provided with the second screw hole, be provided with the through-hole on the arm that stretches out, the second bolt passes through-hole and second screw hole threaded connection. The utility model is used for repairing the bell mouth phenomenon of the chuck, and has simple structure and convenient use.

Description

Chuck maintenance device

Technical Field

The utility model relates to the technical field of machining equipment, in particular to a chuck maintenance device.

Background

The three-jaw chuck on the lathe is connected with the main shaft and used for clamping a workpiece, so that the workpiece can rotate together with the main shaft. As shown in fig. 5, the chuck includes a disc body 1 and jaws 2, one side of the jaws 2 close to the axis of the chuck 1 is a pressing surface 22, two sides of the pressing surface 22 are provided with inclined surfaces 21, a large bevel gear is arranged in the disc body 1 to push three jaws 2 to move, after long-time use, a bell mouth phenomenon (the diameter of a virtual circle where one end of the three jaws 2 close to a main shaft is smaller than that of one end far away from the main shaft, where the pressing surface 22 is located) occurs in the three-jaw chuck due to abrasion between the jaws 2 and an archimedes spiral groove on the back surface of the large bevel gear, and the machining precision and clamping reliability are directly affected, so that the chuck needs to be maintained, and no special device for repairing the bell mouth phenomenon exists at present.

Disclosure of Invention

The technical problem to be solved by the utility model is to provide a chuck maintenance device aiming at the technical defects.

In order to solve the technical problems, the utility model adopts the following technical scheme: the utility model provides a chuck maintenance device, includes the ring body, be provided with a plurality of first screw holes on the ring body about its axis symmetry, first bolt and first screw hole threaded connection, be provided with three arm that stretches out about its axis symmetry on the ring body outer circumference, the one end sliding connection that stretches out the arm and keep away from the ring body has the tight mechanism that colludes that is used for hooking the jack catch and keeps away from disk body one end, the one end of the tight mechanism that colludes is provided with the second screw hole, be provided with the through-hole on the arm that stretches out, the second bolt passes through-hole and second screw hole threaded connection.

Further optimize this technical scheme, collude tight mechanism includes the fly leaf, be provided with the direction chamber on the arm that stretches out, the fly leaf is located the direction intracavity and both sliding connection, the second screw hole sets up the one end at the fly leaf, the one end that the second screw hole was kept away from to the fly leaf is articulated mutually with the one end that colludes tight board, the one end that the fly leaf was kept away from to collude tight board is provided with the breach that is used for holding the jack catch, its both sides of one end that the fly leaf was kept away from to the breach are provided with the sand grip that is used for hooking the inclined plane.

According to the technical scheme, the number of the first threaded holes is six, every two of the six first threaded holes are divided into three threaded hole groups, the three threaded hole groups are symmetrically distributed about the axis of the ring body, the axes of the two first threaded holes in the threaded hole groups are on the same plane passing through the axis of the ring body, and the two first threaded holes are respectively located on two sides of the ring body.

Further optimizing this technical scheme, still be provided with the cavity that is used for holding the jack catch on arm and the ring body.

The utility model has the following advantages: 1. the structure is simple, the use is convenient, and the cost is lower; 2. the hooking plate is hinged with the movable plate, and can correspondingly rotate in the process of pulling out the outer ends of the clamping jaws outwards, so that the convex strips can be kept tightly attached to the inclined planes, and the stress of the contact surfaces is uniform.

Drawings

Fig. 1 is a schematic structural view of a chuck maintenance apparatus.

Fig. 2 is a cross-sectional view of the extension arm.

Fig. 3 is a schematic structural view of the hooking mechanism.

Fig. 4 is a schematic structural view of the device in use.

Fig. 5 is a schematic structural view of the chuck.

In the figure: 1. a tray body; 2. a claw; 21. an inclined plane; 22. a compression surface; 3. a ring body; 31. a first threaded hole; 32. a projecting arm; 321. a guide chamber; 322. a through hole; 33. a cavity; 4. a first bolt; 5. a hooking mechanism; 51. a movable plate; 511. a second threaded hole; 52. hooking and tightening the plate; 521. a notch; 522. a convex strip; 6. and a second bolt.

Detailed Description

The objects, technical solutions and advantages of the present utility model will become more apparent by the following detailed description of the present utility model with reference to the accompanying drawings. It should be understood that the description is only illustrative and is not intended to limit the scope of the utility model. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the present utility model.

The specific embodiment is as follows: referring to fig. 1-5, a chuck maintenance device includes a ring body 3, a plurality of first threaded holes 31 are symmetrically arranged on the ring body 3 about an axis thereof, a first bolt 4 is in threaded connection with the first threaded holes 31 so as to fix the ring body 3 on a disk body 1, three extending arms 32 are symmetrically arranged on the outer circumference of the ring body 3 about the axis thereof, one end, away from the ring body 3, of each extending arm 32 is slidably connected with a hooking mechanism 5 for hooking one end, away from the disk body 1, of each claw 2, a second threaded hole 511 is arranged at one end of each hooking mechanism 5, a through hole 322 is formed in each extending arm 32, each second bolt 6 penetrates through the through hole 322 and is in threaded connection with the corresponding second threaded hole 511, and the hooking mechanism 5 can be pulled out outwards by rotating the second bolt 6.

Specifically, the hooking mechanism 5 includes a movable plate 51, a guide cavity 321 is disposed on the extending arm 32, the movable plate 51 is located in the guide cavity 321 and is in sliding connection with the guide cavity 321, preferably, the cross sections of the movable plate 51 and the guide cavity 321 are rectangular, the second threaded hole 511 is disposed at one end of the movable plate 51, one end of the movable plate 51 away from the second threaded hole 511 is hinged to one end of the hooking plate 52, one end of the hooking plate 52 away from the movable plate 51 is provided with a notch 521 for accommodating the claw 2, two sides of one end of the notch 521 away from the movable plate 51 are provided with a raised strip 522 for hooking the inclined surface 21, preferably, a surface of the raised strip 522, which contacts with the inclined surface 21, is attached to the inclined surface 21, after the claw 2 is hooked, one end of the claw 2 away from the main shaft is inclined outwards, and the raised strip 522 is always tightly attached to the inclined surface 21 due to the hinging of the hooking plate 52 and the movable plate 51, and the contact surface is stressed uniformly. The end of the hooking plate 52 remote from the movable plate 51 is lower than the pressing surface 22 so that the pressing surface 22 can be machined.

Further, the number of the first threaded holes 31 is six, each two of the six first threaded holes 31 are divided into three threaded hole groups, the three threaded hole groups are symmetrically distributed about the axis of the ring body 3, the axes of the two first threaded holes 31 in the threaded hole groups are on the same plane passing through the axis of the ring body 3, and the two first threaded holes 31 are respectively located at two sides of the ring body 3.

Preferably, the projecting arms 32 and the ring body 3 are further provided with cavities 33 for housing the jaws 2. With this construction, the outer diameter of the ring body 3 is not too large, so that the jaws 2 can enter the cavity 33 when they are withdrawn outwards and are not obstructed.

The working process comprises the following steps: when repairing the bell mouth phenomenon of the three-jaw chuck, the chuck is not detached from the lathe, the ring body 3 is directly sleeved outside the disc body 1, in the process, the jaw 2 is moved to a proper position so that the outer end (the end far away from the disc body 1) penetrates into the notch 521, then the first bolt 4 is screwed to fix the ring body 3, then the second bolt 6 is rotated, the hooking mechanism 5 is pulled out, the outer end of the jaw 2 is inclined outwards until the jaw cannot be inclined continuously, then the lathe is started, the pressing surface 22 is machined, all parts of the pressing surface 22 are on the same cylindrical surface, and after the machining is finished, the device is detached.

The foregoing embodiments are not intended to limit the present utility model, but while the present utility model has been described in detail with reference to the foregoing examples, it will be apparent to those skilled in the art that modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features thereof, and any modifications, equivalents, improvements or changes that fall within the spirit and principle of the present utility model should be included in the scope of protection of the present utility model.

Claims (4)

1. A chuck maintenance device, characterized in that: including ring body (3), be provided with a plurality of first screw holes (31) on ring body (3) about its axis symmetry, first bolt (4) and first screw hole (31) threaded connection, be provided with three arm (32) that stretch out about its axis symmetry on ring body (3) outer circumference, the one end sliding connection that ring body (3) were kept away from to arm (32) has and is used for hooking claw (2) and keep away from tight mechanism (5) of colluding of disk body (1) one end, the one end that colludes tight mechanism (5) is provided with second screw hole (511), be provided with through-hole (322) on stretching out arm (32), second bolt (6) pass through-hole (322) and second screw hole (511) threaded connection.

2. The chuck servicing device as in claim 1, wherein: the utility model provides a collude tight mechanism (5) including fly leaf (51), be provided with direction chamber (321) on arm (32) that stretches out, fly leaf (51) are located direction intracavity (321) and both sliding connection, second screw hole (511) set up the one end at fly leaf (51), the one end that second screw hole (511) was kept away from to fly leaf (51) is articulated mutually with the one end that colludes tight board (52), the one end that the fly leaf (51) was kept away from to collude tight board (52) is provided with breach (521) that are used for holding jack catch (2), the one end that the fly leaf (51) was kept away from to breach (521) both sides are provided with sand grip (522) that are used for hooking inclined plane (21).

3. The chuck servicing device as in claim 1, wherein: the number of the first threaded holes (31) is six, every two of the six first threaded holes (31) are divided into three threaded hole groups, the three threaded hole groups are symmetrically distributed about the axis of the ring body (3), the axes of the two first threaded holes (31) in the threaded hole groups are on the same plane passing through the axis of the ring body (3), and the two first threaded holes (31) are respectively located on two sides of the ring body (3).

4. A chuck servicing apparatus according to any of claims 1-3, wherein: the protruding arms (32) and the ring body (3) are also provided with concave cavities (33) for accommodating the clamping claws (2).