CN109351996B

CN109351996B - Three-jaw chuck with zipper function

Info

Publication number: CN109351996B
Application number: CN201811385875.2A
Authority: CN
Inventors: 范伟其
Original assignee: Cixi Aoling Machine Tool Accessories Co ltd
Current assignee: Cixi Aoling Machine Tool Accessories Co ltd
Priority date: 2018-11-20
Filing date: 2018-11-20
Publication date: 2020-04-03
Anticipated expiration: 2038-11-20
Also published as: CN109351996A

Abstract

The invention discloses a three-jaw chuck with a zipper function, which comprises a chuck body, wherein a groove is arranged at the center of the right end of the chuck body, a positioning sleeve is fixed at the center of the left end of the chuck body, a first threaded hole is formed in the center of the positioning sleeve, a second threaded hole coaxially connected with the first threaded hole is formed in the center of the left end of the groove, the first threaded hole is the same as the second threaded hole, a connecting bolt is arranged in the groove, the connecting bolt is in threaded connection with the first threaded hole and the second threaded hole and extends out of the first threaded hole, and a sealing cover fixed on the chuck body through a second fixing screw is arranged at the right end of the groove. The invention has the advantages that: the clamping jaws can synchronously move by rotating the rotating shaft, and a back-pulling and clamping action is generated, so that the workpiece is tightly attached to the reference surface and does not float upwards, and the clamping jaw is simple, convenient and reliable.

Description

Three-jaw chuck with zipper function

Technical Field

The invention relates to a three-jaw chuck with a zipper function.

Background

The three-jaw chuck is a machine tool accessory which clamps and positions a workpiece by utilizing the radial movement of three movable jaws uniformly distributed on a chuck body. The clamping jaws in the existing three-jaw chuck mostly move towards the center vertically so as to clamp the workpiece, and the workpiece is not pulled backwards and clamped, so that the workpiece is not attached to a reference surface and does not float upwards.

Therefore, a three-jaw chuck with a zipper function is needed, which can synchronously move the jaws by rotating the rotating shaft and generate a back-pulling and clamping action, so that a workpiece is tightly attached to a reference surface and does not float upwards, and the chuck is simple, convenient and reliable.

Disclosure of Invention

The invention mainly aims to provide a three-jaw chuck with a zipper function, which can enable jaws to synchronously move by rotating a rotating shaft and generate a back-pulling and clamping action, so that a workpiece is tightly attached to a reference surface and does not float upwards, and the chuck is simple, convenient and reliable.

In order to achieve the above purposes, the technical scheme adopted by the invention is as follows: a three-jaw chuck with a zipper function comprises a chuck body, wherein a groove is formed in the center of the right end of the chuck body, a positioning sleeve is fixed at the center of the left end of the chuck body, a first threaded hole is formed in the center of the positioning sleeve, a second threaded hole which is coaxially connected with the first threaded hole is formed in the center of the left end of the groove, the first threaded hole is identical to the second threaded hole, a connecting bolt is arranged in the groove and is in threaded connection with the first threaded hole and the second threaded hole, the connecting bolt extends out of the first threaded hole, a sealing cover which is fixed on the chuck body through a second fixing bolt is arranged at the right end of the groove, three third threaded holes are uniformly distributed in the right end face of the chuck body along the circumferential central line of the first threaded hole, and a toggle bolt extending out of the third threaded hole is in threaded hole in threaded connection with the toggle bolt, this internal drive mechanism that is equipped with of chuck, drive mechanism is including establishing the pivot of chuck body upper end, the top of pivot are equipped with the hexagon socket head cap recess, the upper end of pivot is equipped with to be fixed the locking mechanism on chuck body top, the lower extreme key joint of pivot has the second skewed tooth, the right-hand member meshing of second skewed tooth has first skewed tooth, the right-hand member coaxial fixation of first skewed tooth has the gear, the lower extreme meshing of gear has the master gear, key joint has the bearing in the master gear, the inner circle of bearing is fixed this is internal to the chuck, bilateral symmetry around the master gear lower extreme be provided with go up the same lower gear of gear, two the lower gear go up the gear is equilateral triangle and distributes, the second screw hole is located equilateral triangle's center department, go up the gear with the center department of first skewed tooth, The center department of lower gear all meshes the lead screw, the lead screw all moves the ground and establishes first movable chamber, the second activity intracavity in the chuck body, first movable chamber intercommunication is in the left end in second activity chamber, the right-hand member in second activity chamber is equipped with the air vent, the right-hand member of lead screw is connected with clamping mechanism includes the jack catch, the right-hand member intercommunication in second activity chamber has the chute, be equipped with on the chuck body with the spigot surface that the chute is connected, the sliding fit has the sloping block in the chute, the sloping block is close to the inclined plane of chuck body outer lane slides on the spigot surface, the jack catch is fixed through first set screw the right-hand member of sloping block, the left end of sloping block is equipped with the spout, the sliding fit has the slider in the spout, the left end of slider with the right-hand member fixed connection of lead screw.

Furthermore, locking mechanism is including fixing the axle sleeve on chuck body top, the axle sleeve cover is established the upper end of pivot, horizontal spiro union has on the axle sleeve is used for locking the locking screw of pivot.

The lubricating mechanism comprises an oil tank arranged at the upper end inside the chuck body, a third movable cavity is arranged at the left end of the oil tank, a cam which is keyed on the rotating shaft is arranged in the third movable cavity, a partition plate is horizontally arranged in the oil tank, an oil hole is formed in the right end of the partition plate, a one-way valve is arranged in the oil hole, the oil tank is divided into an oil filling cavity and a pushing cavity which are arranged up and down by the partition plate, a fixed block is arranged at the right end of the cam, a push rod is fixed at the right end of the fixed block, a push block is fixedly connected after the right end of the push rod passes through the left end of the oil tank, a spring which is sleeved on the push rod is connected between the fixed block and the left side wall of the oil tank, the fixed block is tightly pressed on the working surface of the cam under the acting force of the spring, and the fixed block is arranged in, the push block is arranged in the push cavity in a sliding mode, and a pipeline connected to the right end of the push cavity is arranged on the guide surface.

Further, the vent holes are obliquely arranged from left inside to right outside.

The invention has the advantages that: the clamping jaws can synchronously move by rotating the rotating shaft, and a back-pulling and clamping action is generated, so that the workpiece is tightly attached to the reference surface and does not float upwards, and the clamping jaw is simple, convenient and reliable.

Drawings

FIG. 1 is a schematic structural view according to the present invention;

FIG. 2 is a cross-sectional view according to the present invention;

FIG. 3 is a cross-sectional view of the lead screw according to the present invention as it is moved to the left;

FIG. 4 is a cross-sectional view A-A of FIG. 2;

fig. 5 is an enlarged view of a portion B of fig. 2.

Detailed Description

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art.

As shown in figures 1 to 5, a three-jaw chuck with a zipper function comprises a chuck body 1, a groove 10 is arranged at the center of the right end of the chuck body 1, a positioning sleeve 9 is fixed at the center of the left end of the chuck body 1, a first threaded hole is arranged at the center of the positioning sleeve 9, a second threaded hole coaxially connected with the first threaded hole is arranged at the center of the left end of the groove 10, the first threaded hole is the same as the second threaded hole, a connecting bolt 8 is arranged in the groove 10, the connecting bolt 8 is screwed on the first threaded hole and the second threaded hole, the connecting bolt 8 extends out of the first threaded hole, a sealing cover 5 fixed on the chuck body 1 through a second fixing screw 7 is arranged at the right end of the groove 10, three third threaded holes are circumferentially distributed on the right end face of the chuck body 1 along the central line of the first threaded hole, and a toggle bolt 4 extending out of the third threaded holes is screwed in the third threaded holes, the chuck body 1 is internally provided with a transmission mechanism, the transmission mechanism comprises a rotating shaft 18 arranged at the upper end of the chuck body 1, the top end of the rotating shaft 18 is provided with an inner hexagonal groove, the upper end of the rotating shaft 18 is provided with a locking mechanism fixed at the top end of the chuck body 1, the lower end of the rotating shaft 18 is in keyed joint with a second helical tooth 17, the right end of the second helical tooth 17 is meshed with a first helical tooth 14, the right end of the first helical tooth 14 is coaxially fixed with an upper gear 13, the lower end of the upper gear 13 is meshed with a main gear 12, the main gear 12 is internally keyed joint with a bearing 11, the inner ring of the bearing 11 is fixed in the chuck body 1, the front side and the rear side of the lower end of the main gear 12 are symmetrically provided with lower gears which are the same as the upper gear 13, the two lower gears and the upper gear 13 are distributed in an equilateral triangle shape, a second threaded hole is positioned at the center of, lead screw 15 all moves the first movable chamber of establishing in chuck body 1 with removing, the second activity intracavity, first movable chamber intercommunication is at the left end in second activity chamber, the right-hand member in second activity chamber is equipped with the air vent, the right-hand member of lead screw 15 is connected with clamping mechanism, clamping mechanism includes jack catch 2, the right-hand member intercommunication in second activity chamber has the chute, be equipped with the spigot surface 6 of being connected with the chute on chuck body 1, the spout internal slipping has sloping block 3, the inclined plane slip that sloping block 3 is close to chuck body 1 outer lane is on spigot surface 6, jack catch 2 fixes the right-hand member at sloping block 3 through first set screw, the left end of sloping block 3 is equipped with the spout, the spout internal slipping has slider 16, the left end of slider 16 and the right-hand member fixed connection of lead screw 15. The screw rod 15 moves left and right to drive the slide block 16 to move left and right, and the slide block 16 slides in the sliding groove and simultaneously drives the inclined block 3 to move obliquely, so that the clamping jaws 2 clamp and pull back an object to be clamped.

The locking mechanism comprises a shaft sleeve 25 fixed at the top end of the chuck body 1, the shaft sleeve 25 is sleeved at the upper end of the rotating shaft 18, and a locking screw 26 used for locking the rotating shaft 18 is horizontally screwed on the shaft sleeve 25. The locking screw 26 prevents the spindle 18 from rotating when the jaw 2 is clamped.

The chuck also comprises a lubricating mechanism arranged in the chuck body 1, the lubricating mechanism comprises an oil tank 22 arranged at the upper end in the chuck body 1, a third movable cavity is arranged at the left end of the oil tank 22, a cam 19 which is keyed on the rotating shaft 18 is arranged in the third movable cavity, a partition plate 23 is horizontally arranged in the oil tank 22, an oil hole is arranged at the right end of the partition plate 23, a one-way valve is arranged in the oil hole, the oil tank 22 is divided into an oil filling cavity which is arranged up and down by the partition plate 23, the pushing cavity is formed in a mode that a fixed block is arranged at the right end of the cam 19, a push rod 20 is fixed at the right end of the fixed block, a push block 21 is fixedly connected to the right end of the push rod 20 after the right end of the push rod 20 penetrates through the left end of an oil tank 22, a spring sleeved on the push rod 20 is connected between the fixed block and the left side wall of the oil tank 22, the fixed block is tightly pressed on the working surface of the cam 19 under the acting force of the spring, the fixed block is arranged in a third movable cavity in a left-right moving mode, the push block 21 is in sliding fit in. Lubricating oil is added in a refueling cavity of an oil tank 22, the lubricating oil enters a pushing cavity from an oil hole, when a rotating shaft 18 is rotated, a cam 19 rotates and enables a fixed block to move left and right, the fixed block enables a pushing block 21 to send the lubricating oil in the pushing cavity to a guide surface 6 through a pushing rod 20, and relative movement between an inclined block 3 and the guide surface 6 and between the inclined grooves can be lubricated.

The vent holes are obliquely arranged from left inside to right outside. The outlet of the vent hole is opposite to the clamping jaw 2 in an inclined mode, the vent hole can discharge air in the second movable cavity, and the discharged air generates wind to clean ash on the clamping jaw 2.

The working principle of the clamping device is that when a workpiece needs to be clamped, lubricating oil is added into an oil tank, a second fixing screw is screwed down, a sealing cover is taken down, a connecting bolt penetrates through a first threaded hole and a second threaded hole and is screwed into a machine tool, a chuck body is fixed on the machine tool, a toggle bolt is screwed into the machine tool from a third threaded hole, when the machine tool operates, the chuck body is driven to rotate together, the sealing cover is fixed in place through the second fixing screw, a workpiece is placed between three clamping jaws, a hexagon wrench is used for rotating a rotating shaft through an inner hexagon groove on the rotating shaft, the rotating shaft drives a second helical tooth, the second helical tooth drives a first helical tooth to rotate, the first helical tooth drives an upper gear to rotate, the upper gear drives a main gear to rotate, the main gear drives a lower gear and the upper gear to rotate in the same direction, so that three screw rods are driven to move leftwards, a slide block is driven to move leftwards, the slide block slides, the oblique block moves leftwards along the oblique groove and the guide surface, the clamping jaw moves leftwards, the workpiece is clamped and pulled backwards to lock the workpiece through pulling, the workpiece is tightly attached to the reference surface and does not float upwards, the rotating shaft is fixed after the locking screw penetrates through the shaft sleeve, and when the oblique block moves leftwards, air in the second movable cavity is discharged from the air vent, so that dust is removed from the clamping jaw through air. When the finished workpiece needs to be taken down, the locking screw is sent, the rotating shaft is rotated in the opposite direction, the rotating shaft drives the upper gear to rotate in the opposite direction through the second helical teeth and the first helical teeth, the upper gear drives the main gear to rotate, the main gear drives the lower gear to rotate in the same direction as the upper gear, the three lead screws move rightwards, the lead screws drive the sliding block to move rightwards, the sliding block slides in the sliding groove and drives the inclined block to move rightwards and outwards, the inclined block moves rightwards and outwards along the inclined groove and the guide surface, the clamping jaws move rightwards and outwards, the finished workpiece is loosened, the workpiece is convenient to take down, and a process is finished. And when rotating the pivot, drive the cam and rotate, lubricating oil gets into the propelling movement chamber from the oilhole, and the cam rotates and makes the fixed block remove about, and the fixed block makes the ejector pad send the lubricating oil in the propelling movement intracavity into the spigot surface through the push rod on, because the effect of check valve, the lubricating oil in the propelling movement intracavity can't get back to and refuel the intracavity, just so can lubricate the relative motion between sloping block and spigot surface, chute.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a three-jaw chuck with zip function, includes chuck body (1), the center department of chuck body (1) right-hand member is equipped with recess (10), the center department of chuck body (1) left end is fixed with position sleeve (9), its characterized in that: a first threaded hole is formed in the center of the positioning sleeve (9), a second threaded hole which is coaxially connected with the first threaded hole is formed in the center of the left end of the groove (10), the first threaded hole is identical to the second threaded hole, a connecting bolt (8) is arranged in the groove (10), the connecting bolt (8) is in threaded connection with the first threaded hole and the second threaded hole, the connecting bolt (8) extends out of the first threaded hole, a sealing cover (5) which is fixed on the chuck body (1) through a second fixing screw (7) is arranged at the right end of the groove (10), three third threaded holes are circumferentially and uniformly formed in the right end face of the chuck body (1) along the central line of the first threaded hole, a toggle bolt (4) which extends out of the third threaded hole is in threaded connection with the third threaded hole, and a transmission mechanism is arranged in the chuck body (1), the transmission mechanism comprises a rotating shaft (18) arranged at the upper end of the chuck body (1), an inner hexagonal groove is formed in the top end of the rotating shaft (18), a locking mechanism fixed on the top end of the chuck body (1) is arranged at the upper end of the rotating shaft (18), a second helical tooth (17) is connected to the lower end of the rotating shaft (18) in a keyed mode, a first helical tooth (14) is meshed with the right end of the second helical tooth (17), an upper gear (13) is coaxially fixed at the right end of the first helical tooth (14), a main gear (12) is meshed with the lower end of the upper gear (13), a bearing (11) is connected to the inner side of the main gear (12) in a keyed mode, the inner ring of the bearing (11) is fixed in the chuck body (1), lower gears identical to the upper gear (13) are symmetrically arranged on the front side and the rear side of the lower gear, and the upper gear (13) is distributed in a triangular mode, the second threaded hole is located at the center of the equilateral triangle, the upper gear (13) is meshed with the center of the first helical gear (14) and the center of the lower gear, the lead screw (15) is arranged in a first movable cavity and a second movable cavity in the chuck body (1) in a left-right moving mode, the first movable cavity is communicated with the left end of the second movable cavity, the right end of the second movable cavity is provided with a vent hole, the right end of the lead screw (15) is connected with a clamping mechanism, the clamping mechanism comprises a clamping jaw (2), the right end of the second movable cavity is communicated with a chute, a guide surface (6) connected with the chute is arranged on the chuck body (1), an oblique block (3) is arranged in the chute in a sliding mode, the oblique block (3) is close to an inclined plane of the outer ring of the chuck body (1) and slides on the guide surface (6), the clamping jaw (2) is fixed at the right end of the inclined block (3) through a first fixing screw, a sliding groove is formed in the left end of the inclined block (3), a sliding block (16) is arranged in the sliding groove in a sliding mode, and the left end of the sliding block (16) is fixedly connected with the right end of the screw rod (15).

2. A three jaw chuck with a zipper function according to claim 1, wherein: locking mechanism is including fixing shaft sleeve (25) on chuck body (1) top, shaft sleeve (25) cover is established the upper end of pivot (18), level spiro union has and is used for locking on shaft sleeve (25) locking screw (26) of pivot (18).

3. A three jaw chuck with a zipper function according to claim 1, wherein: the oil-free chuck is characterized by further comprising a lubricating mechanism arranged in the chuck body (1), the lubricating mechanism comprises an oil tank (22) arranged at the upper end of the inside of the chuck body (1), a third movable cavity is arranged at the left end of the oil tank (22), a cam (19) which is connected with the rotating shaft (18) in a keyed mode is arranged in the third movable cavity, a partition plate (23) is horizontally arranged in the oil tank (22), an oil hole is formed in the right end of the partition plate (23), a one-way valve is arranged in the oil hole, the oil tank (22) is divided into an oil filling cavity and a pushing cavity which are arranged up and down by the partition plate (23), a fixed block is arranged at the right end of the cam (19), a push rod (20) is fixed at the right end of the fixed block, the right end of the push rod (20) penetrates through a push block (21) fixedly connected behind the left end of the oil tank (22), a spring which, the fixed block is pressed on the working surface of the cam (19) under the action force of the spring, the fixed block is arranged in the third movable cavity in a left-right moving mode, the push block (21) is arranged in the push cavity in a sliding mode, and a pipeline (24) connected to the right end of the push cavity is arranged on the guide surface (6).

4. A three-jaw chuck having a zipper function according to any one of claims 1 to 3, wherein: the vent holes are obliquely arranged from left inside to right outside.