CN210232440U - Traction chuck - Google Patents

Abstract

The utility model discloses a traction chuck, which comprises a taper shank, wherein the right end of the taper shank is provided with a top shaft along the axial direction, and the right end of the top shaft is provided with a top; a sleeve is fixedly arranged on the top shaft, a shaft sleeve is rotatably connected onto the sleeve, a first rotary table is fixedly arranged on the shaft sleeve, and a chuck shell is fixedly arranged on the first rotary table; the shaft sleeve is rotatably connected with a chuck plate assembly positioned in a chuck plate shell, a plurality of pin shafts are mounted at the right end of the chuck plate assembly, and clamping jaws are hinged to the pin shafts; an annular convex plate extending inwards is arranged on the inner side wall of the chuck plate shell, a plurality of convex columns corresponding to the clamping jaws one by one are arranged on the right end face of the annular convex plate, and sliding chutes matched with the convex columns are arranged on the clamping jaws; a deflector rod assembly matched with the grinding machine spindle and used for driving the chuck assembly to act is arranged on the first rotating disc; the traction chuck is reasonable in structure, and can quickly clamp and loosen a workpiece.

Description

Traction chuck

Technical Field

The utility model relates to the technical field of mechanical equipment, specifically indicate a pull (holding) chuck.

Background

At present, with the development of the mechanical industry, the trend of the large-scale of mechanical equipment is more and more obvious, and the large-scale processing equipment of mechanical parts is required, but the updating and updating of the existing equipment have greater economic pressure on a plurality of small and medium-sized enterprises. When the grinding machine is used for grinding the excircle of a workpiece, generally, a chuck of a machine head provides gripping force to clamp one end of a dead shaft part, and the other end of the shaft part is propped against by a tail seat thimble of the grinding machine to realize grinding processing. When the workpiece is fixed on the main shaft, the chuck is adopted for fixing, so that the assembling and disassembling operation is troublesome, and the grinding efficiency of the workpiece is greatly influenced.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model provides a traction chuck, it is rational in infrastructure not only, but also can realize the clamp of work piece fast tightly with loosen.

(II) technical scheme

In order to achieve the above object, the utility model provides a following technical scheme: a traction chuck comprises a taper shank for being installed in a taper hole of a main shaft of a grinding machine, wherein a top shaft is arranged at the right end of the taper shank along the axial direction of the taper shank, and a top point is arranged at the right end of the top shaft; a sleeve is fixedly arranged on the top shaft, a shaft sleeve is rotatably connected onto the sleeve, a first rotary table extending along the radial direction of the shaft sleeve is fixedly arranged on the shaft sleeve, and a chuck shell is fixedly arranged on the first rotary table; the shaft sleeve is rotatably connected with a chuck plate assembly positioned in a chuck plate shell, a plurality of pin shafts are uniformly and fixedly installed at the right end of the chuck plate assembly at intervals by taking the shaft sleeve as a center, and the pin shafts are hinged with clamping jaws for clamping workpieces; an annular convex plate extending inwards is arranged on the inner side wall of the chuck shell at a position close to the pin shaft, a plurality of convex columns corresponding to the clamping jaws one by one are uniformly and fixedly arranged on the right end surface of the annular convex plate at intervals by taking the shaft sleeve as a center, and a sliding groove matched with the convex columns is arranged at one end, far away from the center, of the clamping jaw; and the first rotating disc is provided with a deflector rod assembly which is matched with the grinding machine spindle and used for driving the chuck assembly to act.

Through the technical scheme, when the traction chuck works, the taper shank is inserted into the taper hole of the main shaft of the grinding machine, one end of a workpiece is fixed on the tip, and the other end of the workpiece is propped by the thimble of the tail seat of the grinding machine; then the grinding machine spindle is controlled to rotate, when the grinding machine spindle rotates, the driving lever assembly drives the chuck plate assembly to instantaneously reversely move relative to the grinding machine spindle, and further the pin shaft drives the clamping jaw to instantaneously reversely move around the top shaft, so that one end of the clamping jaw, which is close to the top, is pressed on a workpiece under the action of the convex column and the sliding groove, and the workpiece is clamped to rotate together for grinding; after grinding is finished, controlling the main shaft of the grinding machine to rotate reversely, driving the chuck plate assembly to instantaneously move reversely relative to the main shaft of the grinding machine through the deflector rod assembly, and further loosening the workpiece through the clamping jaw; the traction chuck can control the clamping and loosening of the workpiece along with the rotation of the main shaft of the grinding machine, and greatly improves the processing efficiency of the workpiece.

In a further technical scheme, the chuck plate assembly comprises a second turntable which is rotatably connected to the shaft sleeve and a third turntable which is fixedly arranged on the right end face of the second turntable, and the pin shaft is fixedly arranged on the right end face of the third turntable; this arrangement facilitates assembly and disassembly of the second turntable and the third turntable.

In a further technical scheme, the shifting lever assembly comprises a shifting lever, a first rotating shaft, a connecting rod and a driving disc; the first rotating shaft is rotationally connected to the first rotating disc along the axial direction of the top shaft, and the poke rod is fixedly arranged at the left end of the first rotating shaft and is positioned outside the chuck shell; the connecting rod is positioned between the first rotating disc and the second rotating disc, one end of the connecting rod is fixedly arranged at the right end of the first rotating shaft, the other end of the connecting rod is fixedly provided with a first shaft pin, and a sliding pin groove for inserting the first shaft pin is arranged on the left end face of the second rotating disc along the radial direction of the sliding pin groove; is arranged between the first rotating disc and the second rotating disc; the driving disc is installed on the grinding machine spindle, a poking groove is formed in the poking rod along the length direction of the poking rod, and a power rod inserted into the poking groove is arranged on the driving disc.

According to the technical scheme, when the shifting lever assembly works, the driving disc drives the power rod to rotate around the jacking shaft, the power rod drives the second turntable to instantaneously generate reverse rotation for a certain distance relative to the driving disc through the shifting groove, the shifting rod, the first rotating shaft, the connecting rod, the first shaft pin and the sliding pin groove, and then the clamping jaw is driven to rotate for a certain distance through the third turntable and the shaft pin arranged on the third turntable; and similarly, when the driving disc rotates reversely, the clamping jaw is driven to rotate reversely for a certain distance.

In a further technical scheme, an annular dust cover is installed at the opening at the right end of the chuck shell.

(III) advantageous effects

Compared with the prior art, the technical scheme of the utility model have following advantage:

when the traction chuck works, the taper shank is inserted into a taper hole of a main shaft of a grinding machine, one end of a workpiece is fixed on a tip, and the other end of the workpiece is propped by a thimble of a tail seat of the grinding machine; then the grinding machine spindle is controlled to rotate, when the grinding machine spindle rotates, the driving lever assembly drives the chuck plate assembly to instantaneously reversely move relative to the grinding machine spindle, and further the pin shaft drives the clamping jaw to instantaneously reversely move around the top shaft, so that one end of the clamping jaw, which is close to the top, is pressed on a workpiece under the action of the convex column and the sliding groove, and the workpiece is clamped to rotate together for grinding; after grinding is finished, controlling the main shaft of the grinding machine to rotate reversely, driving the chuck plate assembly to instantaneously move reversely relative to the main shaft of the grinding machine through the deflector rod assembly, and further loosening the workpiece through the clamping jaw; the traction chuck can control the clamping and loosening of the workpiece along with the rotation of the main shaft of the grinding machine, and greatly improves the processing efficiency of the workpiece.

Drawings

FIG. 1 is a front cross-sectional view of an embodiment of a traction chuck;

FIG. 2 is a left side view of the traction chuck of the embodiment;

FIG. 3 is a right side view of the traction chuck of the embodiment;

fig. 4 is a front cross-sectional view of the traction chuck as mounted on the spindle of the grinding machine in an embodiment.

Detailed Description

Referring to fig. 1-4, a traction chuck comprises a taper shank 2 for being mounted in a taper hole of a main shaft 1 of a grinding machine, wherein the right end of the taper shank 2 is provided with a top shaft 3 along the axial direction thereof, and the right end of the top shaft 3 is provided with a top tip 4; a sleeve 5 is fixedly installed on the top shaft 3, a shaft sleeve 6 is rotatably connected to the sleeve 5, a first rotating disc 7 extending along the radial direction of the shaft sleeve 6 is fixedly arranged on the shaft sleeve 6, a chuck shell 8 is fixedly installed on the first rotating disc 7, and an annular dust cover 9 is installed at the opening at the right end of the chuck shell 8; the shaft sleeve 6 is rotatably connected with a chuck assembly positioned in a chuck shell 8, a plurality of pin shafts 10 are uniformly and fixedly arranged at the right end of the chuck assembly at intervals by taking the shaft sleeve 6 as a center, and the pin shafts 10 are all hinged with clamping jaws 11 for clamping workpieces; an annular convex plate 12 extending inwards is arranged on the inner side wall of the chuck shell 8 at a position close to the pin shaft 10, a plurality of convex columns 13 corresponding to the clamping jaws 11 one by one are uniformly and fixedly arranged on the right end surface of the annular convex plate 12 at intervals by taking the shaft sleeve 6 as a center, and a sliding groove 14 matched with the convex columns 13 is arranged at one end, far away from the tip 4, of the clamping jaw 11; and a deflector rod assembly matched with the grinding machine spindle 1 and used for driving the chuck assembly to act is arranged on the first rotating disc 7.

The chuck assembly comprises a second turntable 15 rotatably connected to the shaft sleeve 6 and a third turntable 16 fixedly mounted on the right end face of the second turntable 15 through a compression ring and a bolt, the pin shaft 10 is fixedly mounted on the right end face of the third turntable 16, and the assembly and disassembly of the second turntable 15 and the third turntable 16 are facilitated.

The shifting lever assembly comprises a shifting lever 17, a first rotating shaft 18, a connecting rod 19 and a driving disc 20; the first rotating shaft 18 is connected to the first rotating disc 7 in a rotating manner along the axial direction of the top shaft 3, and the poke rod 17 is fixedly arranged at the left end of the first rotating shaft 18 and is positioned outside the chuck shell 8; the connecting rod 19 is positioned between the first rotating disc 7 and the second rotating disc 15, one end of the connecting rod 19 is fixedly arranged at the right end of the first rotating shaft 18, the other end of the connecting rod is fixedly arranged with the first rotating shaft 21, and a sliding pin groove 22 for inserting the first rotating shaft 21 is arranged on the left end surface of the second rotating disc 15 along the radial direction; between the first turntable 7 and the second turntable 15; the driving disc 20 is installed on the grinding machine spindle 1, a poking groove 23 is formed in the poking rod 17 along the length direction of the poking rod, and a power rod 24 inserted into the poking groove 23 is arranged on the driving disc 20.

When the traction chuck works, the taper shank 2 is inserted into a taper hole of a main shaft 1 of a grinding machine, one end of a workpiece is fixed on a tip 4, and the other end of the workpiece is propped by a thimble of a tail seat of the grinding machine; and then the grinding machine spindle 1 is controlled to rotate, the driving disc 20 is driven to rotate when the grinding machine spindle 1 rotates, the driving disc 20 drives the power rod 24 to rotate around the top shaft 3, the power rod 24 drives the second rotating disc 15 to instantaneously rotate for a reverse distance relative to the driving disc 20 through the toggle groove 23, the toggle rod 17, the first rotating shaft 18, the connecting rod 19, the first shaft pin 21 and the sliding pin groove 22, and then the clamping jaw 11 is driven to instantaneously rotate reversely around the top shaft 3 through the third rotating disc 16 and the shaft pin arranged on the third rotating disc 16, so that one end, close to the top 4, of the clamping jaw 11 is pressed on a workpiece under the action of the convex column 13 and the sliding groove 14, and the workpiece is clamped to rotate together for grinding. After grinding is finished, controlling the main shaft 1 of the grinding machine to reversely rotate, driving the second rotary table 15 to instantaneously generate reverse rotation for a certain distance relative to the driving disc 20 through the driving disc 20, the power rod 24, the toggle groove 23, the toggle rod 17, the first rotary shaft 18, the connecting rod 19, the first shaft pin 21 and the sliding pin groove 22, and further enabling the clamping jaw 11 to loosen a workpiece through the third rotary table 16, the shaft pin, the convex column 13 and the sliding groove 14; the traction chuck can control the clamping and loosening of the workpiece along with the rotation of the grinding machine spindle 1, and the machining efficiency of the workpiece is greatly improved.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the technical principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims (4)

1. A traction chuck comprises a taper shank for being installed in a taper hole of a main shaft of a grinding machine, and is characterized in that the right end of the taper shank is provided with a top shaft along the axial direction of the taper shank, and the right end of the top shaft is provided with a top tip; a sleeve is fixedly arranged on the top shaft, a shaft sleeve is rotatably connected onto the sleeve, a first rotary table extending along the radial direction of the shaft sleeve is fixedly arranged on the shaft sleeve, and a chuck shell is fixedly arranged on the first rotary table; the shaft sleeve is rotatably connected with a chuck plate assembly positioned in a chuck plate shell, a plurality of pin shafts are uniformly and fixedly installed at the right end of the chuck plate assembly at intervals by taking the shaft sleeve as a center, and the pin shafts are hinged with clamping jaws for clamping workpieces; an annular convex plate extending inwards is arranged on the inner side wall of the chuck shell at a position close to the pin shaft, a plurality of convex columns corresponding to the clamping jaws one by one are uniformly and fixedly arranged on the right end surface of the annular convex plate at intervals by taking the shaft sleeve as a center, and a sliding groove matched with the convex columns is arranged at one end, far away from the center, of the clamping jaw; and the first rotating disc is provided with a deflector rod assembly which is matched with the grinding machine spindle and used for driving the chuck assembly to act.

2. The traction chuck according to claim 1, wherein the chuck assembly includes a second rotatable disk rotatably coupled to the sleeve, and a third rotatable disk fixedly mounted to a right end face of the second rotatable disk, the pin being fixedly mounted to a right end face of the third rotatable disk.

3. The traction chuck according to claim 2, wherein the shifter assembly comprises a shifter rod, a first pivot shaft, a connecting rod, a drive plate; the first rotating shaft is rotationally connected to the first rotating disc along the axial direction of the top shaft, and the poke rod is fixedly arranged at the left end of the first rotating shaft and is positioned outside the chuck shell; the connecting rod is positioned between the first rotating disc and the second rotating disc, one end of the connecting rod is fixedly arranged at the right end of the first rotating shaft, the other end of the connecting rod is fixedly provided with a first shaft pin, and a sliding pin groove for inserting the first shaft pin is arranged on the left end face of the second rotating disc along the radial direction of the sliding pin groove; is arranged between the first rotating disc and the second rotating disc; the driving disc is installed on the grinding machine spindle, a poking groove is formed in the poking rod along the length direction of the poking rod, and a power rod inserted into the poking groove is arranged on the driving disc.

4. The traction chuck according to claim 1, wherein an annular dust cap is mounted at the right end opening of the chuck housing.

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