Three-jaw chuck

Abstract

The utility model discloses a three-jaw chuck which comprises an installation shell, a worm gear is installed in the installation shell, a worm is connected to the worm gear in a meshed mode, a rotating disc is fixedly connected to the worm gear, a plurality of arc-shaped grooves are formed in the rotating disc, clamping jaws are connected to the arc-shaped grooves, and the clamping jaws are connected to the arc-shaped grooves. Arc-shaped abutting blocks are movably installed at the front ends of the clamping jaws. According to the three-jaw chuck, power output is achieved through the worm gear and the worm, the positions of the clamping jaws are adjusted, and a workpiece is clamped and fixed, the worm gear is connected with the rotating disc through the connecting rod and drives the rotating disc to rotate, then the rotating disc adjusts the positions of the clamping jaws through the arc-shaped grooves, and the clamping jaws are conveniently controlled to clamp and fix the workpiece; and the arc-shaped abutting blocks are movably installed at the ends of the clamping jaws, the multiple grooves of different sizes are formed in the arc-shaped abutting blocks, the cylindrical workpieces of different diameters are clamped and fixed through the grooves of different sizes, and the stability of the cylindrical workpieces is kept.

Description

TECHNICAL FIELD

[0001] The utility model relates to be applicable to clamping, more specifically, relate to a three jaw chuck. BACKGROUND

[0002] Three jaw chuck refers to the radial movement of three movable clamping jaws evenly distributed on the chuck body to clamp and position workpieces.

[0003] Three jaw chuck is also called three jaw self-centering chuck, which determines the rotation center of the workpiece according to the circumference of the clamped part of the workpiece, but its centering accuracy is not very high. Generally, according to the use occasion, high-precision three jaw chucks are selected for clamping high-precision parts in fine turning, grinding and milling with universal indexing head, while low-precision three jaw chucks are used in rough turning and grinding and milling without shape accuracy requirements.

[0004] However, the existing three jaw chuck generally uses a clamping block to clamp and fix the workpiece to maintain the stability of the workpiece. The clamping and fixing of the clamping block is not convenient for clamping cylindrical workpieces, which can easily cause the cylindrical workpieces to rotate and cause unstable clamping. SUMMARY

[0005] An object of the utility model is to provide a new technical solution for a three jaw chuck.

[0006] According to the first aspect of the utility model, a three jaw chuck is provided, which comprises a mounting shell, a worm gear is mounted in the interior of the mounting shell, a worm is meshed and connected on the worm gear, a rotating disc is fixedly connected on the worm gear, a plurality of arc-shaped grooves are formed on the rotating disc, a clamping jaw is connected on the arc-shaped groove, and an arc-shaped stopper is movably mounted at the front end of the clamping jaw.

[0007] Preferably, a limiting ring is fixedly arranged at the upper end of the mounting shell, and a limiting groove is formed in the limiting ring.

[0008] Preferably, the bottom of the clamping jaw is movably connected in the interior of the limiting groove, and a plurality of grooves are formed in the arc-shaped stopper.

[0009] Preferably, an installation ring is fixedly arranged in the middle of the mounting shell, the worm gear is movably connected on the installation ring, and the worm is movably mounted on one side of the mounting shell.

[0010] Preferably, two annular grooves are formed in the upper end surface of the mounting shell, two connecting rods are fixedly arranged at the upper end of the worm gear, and the two connecting rods are movably arranged in the two annular grooves, respectively.

[0011] Preferably, one side of the mounting shell is provided with a side hole, one end of the worm is movably arranged in the side hole, and a hexagonal socket is formed in the one end of the worm.

[0012] Preferably, the bottom of the mounting shell is fixedly provided with a mounting plate, and a plurality of threaded connection holes are formed in the mounting plate.

[0013] According to one embodiment of the present disclosure, the three-jaw chuck is powered by a worm and a worm gear, facilitating position adjustment of the clamping jaw, clamping and fixing of the workpiece, and connection and driving rotation of the rotating disc by the worm gear through the connecting rod, so that the rotating disc adjusts the position of the clamping jaw through the arc-shaped groove, facilitating control of the clamping jaw to clamp and fix the workpiece.

[0014] An arc-shaped abutting block is movably arranged at the end of the clamping jaw, and a plurality of grooves of different sizes are formed in the arc-shaped abutting block, so that cylindrical workpieces of different diameters are clamped and fixed, and the stability of the cylindrical workpiece is maintained.

[0015] Other features and advantages of the present disclosure will become apparent from the following detailed description of exemplary embodiments thereof, taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0016] The accompanying drawings incorporated in and forming a part of the specification illustrate embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0017] Figure 1 FIG. 1 is a schematic view of the overall structure of a three-jaw chuck according to one embodiment of the present disclosure;

[0018] Figure 2 FIG. 2 is a partial structure side view of the three-jaw chuck according to one embodiment of the present disclosure;

[0019] Figure 3 FIG. 3 is a partial structure bottom view of the three-jaw chuck according to one embodiment of the present disclosure;

[0020] Figure 4 FIG. 4 is a top view of the mounting shell and the rotating disc of the three-jaw chuck according to one embodiment of the present disclosure;

[0021] Figure 5 FIG. 5 is a bottom view of the mounting shell and the rotating disc of the three-jaw chuck according to one embodiment of the present disclosure;

[0022] Figure 6 FIG. 6 is a schematic view of the mounting shell of the three-jaw chuck according to one embodiment of the present disclosure.

[0023] As shown in the figure: 1, installation shell; 2, worm; 3, worm; 4, rotating disc; 5, claw; 6, arc block; 7, connecting rod; 8, arc slot; 9, mounting ring; 10, limit ring; 11, limit slot; 12, mounting plate; 13, annular groove; 14, side hole. DETAILED DESCRIPTION

[0024] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. Note that the relative arrangement, numerical expressions, and numerical values of components and steps set forth in these embodiments are not limiting to the scope of the present application unless otherwise specifically stated.

[0025] The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the application or its application or uses.

[0026] Techniques, methods, and apparatus known to those of ordinary skill in the relevant art can not be discussed in detail herein, but should be considered as part of the specification, where appropriate.

[0027] In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary, and not as a limitation. Thus, other examples of the exemplary embodiments can have different values.

[0028] As shown in the figure: 1, installation shell; 2, worm; 3, worm; 4, rotating disc; 5, claw; 6, arc block; 7, connecting rod; 8, arc slot; 9, mounting ring; 10, limit ring; 11, limit slot; 12, mounting plate; 13, annular groove; 14, side hole. Figures 1-6 A three-jaw chuck, comprising an installation shell 1, a worm 2 is installed inside the installation shell 1, the worm 2 is meshed and connected with a worm 3, the worm 2 is fixedly connected with a rotating disc 4, a plurality of arc grooves 8 are formed on the rotating disc 4, a claw 5 is connected on the arc groove 8, and an arc block 6 is movably installed at the front end of the claw 5.

[0029] In this embodiment, preferably, a limit ring 10 is fixedly arranged at the upper end of the installation shell 1, and a limit slot 11 is formed on the limit ring 10;

[0030] It should be noted that the limit ring 10 is arranged to facilitate the installation of the claw 5, that is, the claw 5 is limited by the limit slot 11 to maintain the stability of the claw 5 during movement adjustment.

[0031] In this embodiment, preferably, the bottom of the claw 5 is movably connected inside the limit slot 11, and a plurality of grooves are formed on the arc block 6;

[0032] It should be noted that the claw 5 is installed inside the limit slot 11, which can maintain the stability and accuracy of the claw 5 during movement adjustment, and a plurality of grooves are formed on the arc block 6, which can realize clamping and fixing of the cylindrical workpiece through the grooves, and maintain the stability of the workpiece clamping.

[0033] In the embodiment, preferably, the middle of the installation shell 1 is fixedly provided with an installation ring 9, the worm wheel 2 is movably connected to the installation ring 9, and the worm 3 is movably installed on one side of the installation shell 1.

[0034] It should be noted that the installation ring 9 is arranged to facilitate the movable installation of the worm wheel 2, so that the worm wheel 2 can stably rotate under the action of the worm 3, and the worm 3 is installed on one side of the installation shell 1, facilitating the meshing connection of the worm 3 and the worm wheel 2, achieving power transmission, adjusting the contraction and expansion of the clamping jaw 5, facilitating the clamping of the workpiece, and the arrangement of the installation ring 9 also facilitates the insertion and installation of the workpiece, and then the workpiece is fixedly clamped.

[0035] In the embodiment, preferably, two annular grooves 13 are formed in the upper end face of the installation shell 1, and two connecting rods 7 are fixedly arranged at the upper end of the worm wheel 2, and the two connecting rods 7 are movably arranged in the two annular grooves 13, respectively.

[0036] It should be noted that the annular grooves 13 are arranged to facilitate the penetration of the connecting rods 7, so that the worm wheel 2 can be connected to the rotating disc 4 through the connecting rods 7, which can not only keep the worm wheel 2 connected to the rotating disc 4, but also keep the rotating disc 4 stably rotating.

[0037] In the embodiment, preferably, a side hole 14 is formed in one side of the installation shell 1, one end of the worm 3 is movably arranged in the side hole 14, and an internal hexagonal screw hole is formed in the one end of the worm 3.

[0038] It should be noted that the side hole 14 is arranged to facilitate the installation and connection of the worm 3, and the one end of the worm 3 is provided with an internal hexagonal screw hole, which facilitates the rotation of the worm 3 through a tool, so that the worm 3 can drive the worm wheel 2, and then the rotating disc 4 drives the clamping jaw 5 to move and adjust, thereby clamping the workpiece.

[0039] In the embodiment, preferably, an installation plate 12 is fixedly arranged at the bottom of the installation shell 1, and a plurality of threaded connection holes are formed in the installation plate 12.

[0040] It should be noted that the installation plate 12 is arranged to facilitate the fixed installation of the installation shell 1, and the threaded connection holes are arranged to facilitate the fixed connection of the installation plate 12.

[0041] Although some specific embodiments of the utility model have been described in detail through examples, those skilled in the art should understand that the above examples are only for illustration, not for limiting the scope of the utility model. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the utility model. The scope of the utility model is defined by the appended claims.

Claims

1. A three jaw chuck, characterized by: Including installation shell (1), the inside installation of installation shell (1) is equipped with worm wheel (2), is engaged with the worm (3) on worm wheel (2), the fixed connection of worm wheel (2) is equipped with rotary disc (4), the multiple arc grooves (8) are opened in rotary disc (4), the claw (5) is connected in arc groove (8), the front end movable installation of claw (5) is equipped with arc abutment (6).

2. A three jaw chuck as claimed in claim 1, wherein: The upper end of the installation shell (1) is fixedly provided with a limiting ring (10), and the limiting ring (10) is provided with a limiting groove (11).

3. A three jaw chuck as claimed in claim 2, wherein: The bottom of the claw (5) is movably connected in the inside of the limiting groove (11), and the arc abutment (6) is provided with a plurality of grooves.

4. A three jaw chuck as claimed in claim 1, wherein: The middle of the installation shell (1) is fixedly provided with a mounting ring (9), and the worm wheel (2) is movably connected to the mounting ring (9), and the worm (3) is movably mounted on one side of the installation shell (1).

5. A three jaw chuck as claimed in claim 1, wherein: The upper end surface of the installation shell (1) is provided with two annular grooves (13), and the upper end of the worm wheel (2) is fixedly provided with two connecting rods (7), and the two connecting rods (7) are movably arranged in the two annular grooves (13) respectively.

6. A three jaw chuck as claimed in claim 1, wherein: The side hole (14) is formed in one side of the installation shell (1), one end of the worm (3) is movably arranged in the side hole (14), and an internal hexagonal screw hole is formed in one end of the worm (3).

7. A three jaw chuck as claimed in claim 1, wherein: The bottom of the installation shell (1) is fixedly provided with a mounting plate (12), and the mounting plate (12) is provided with a plurality of threaded connection holes.

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