Floating self-centering eight-jaw chuck

Abstract

The utility model discloses a floating self-centering eight-jaw chuck, belongs to the technical field of eight-jaw chucks, and relates to the technical field of floating self-centering eight-jaw chucks. A clamping assembly is arranged above a base plate, the clamping assembly comprises a movable block, a positioning pin penetrates through the surface of the movable block in a threaded connection mode, and a T-shaped protruding block is fixedly connected to the bottom face of the movable block. According to the floating self-centering eight-jaw chuck, a to-be-tested piece is placed in the middle of the clamping assembly, then the clamping assembly is tightened, an arc-shaped plate at the tail end of a movable block abuts against the surface of the to-be-tested piece, multiple arc-shaped plates arranged at the tail ends of clamping jaws can be better attached to the surface of the to-be-tested piece, and clamping becomes more efficient; the hydraulic rod drives the cross-shaped cushion block to move, and when the cross-shaped cushion block moves, the supporting block at the tail end of the Y-shaped connecting rod expands outwards till abutting against the inner wall of the pipe profile, so that the clamping device can conduct double clamping of inner supporting and outer folding on the hollow pipe profile, and even light pipe profiles can be stably clamped.

Description

Technical Field

[0001] The utility model relates to the technical field of eight-jaw chucks, in particular to a floating self-centering eight-jaw chuck. Background Art

[0002] A chuck is a mechanical device used to clamp a workpiece on a machine tool. It is a machine tool accessory that uses the radial movement of the movable jaws evenly distributed on the chuck body to clamp and position the workpiece. A chuck generally consists of three parts: a chuck body, movable jaws, and a jaw drive mechanism. The chuck body has a minimum diameter of 65 mm and a maximum diameter of 1500 mm, with a through hole in the center to allow the workpiece or bar to pass through.

[0003] After consulting the materials, it was found that in some existing eight-jaw chucks, when clamping the tube profile, the curvature of the tube profile surface makes it difficult for the jaws to fit the tube surface perfectly, resulting in a certain error in the turned product; and for hollow tube materials, turning can only be done by clamping the outer periphery. Since the hollow tube is light in weight, this single clamping method is not stable enough. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a floating self-centering eight-jaw chuck to solve the above problems.

[0005] To achieve the above purpose, a floating self-centering eight-jaw chuck comprises a chassis, a clamping assembly is arranged above the chassis, the clamping assembly comprises a movable block, a locating pin is screwed through the surface of the movable block, a T-shaped protrusion is fixedly connected to the bottom surface of the movable block, a hole is opened at the front end of the movable block, a spring is fixedly connected to the inner wall of the hole at the front end of the movable block, a connecting tube is fixedly connected to the top of the spring, a boss is fixedly connected to the top surface of the connecting tube, a rotating shaft is movably penetrated on the surface of the boss, an arc plate is rotatably connected to the surface of the boss via the rotating shaft, a driving assembly is arranged on the bottom surface of the chassis, the driving assembly comprises a hydraulic rod, the output end of the hydraulic rod movably penetrates the surface of the chassis, a cross pad is fixedly connected to the end face of the output end of the hydraulic rod, and an inner support assembly is arranged around the cross pad.

[0006] Furthermore, an auxiliary mounting assembly is disposed on the surface of the chassis, and the auxiliary mounting assembly includes a fan-shaped mounting plate, and a slide block is fixedly connected to the surface of the fan-shaped mounting plate.

[0007] By adopting the above technical solution, a clamping claw is installed on the mounting plate for clamping.

[0008] Furthermore, the T-shaped protrusion is slidably connected inside the slide groove block.

[0009] By adopting the above technical solution, the clamping assembly is slidably installed inside the slide block through the T-shaped protrusion.

[0010] Furthermore, the inner support assembly includes a cylinder, which is fixedly connected to the edges of the cross pad, and both ends of the cylinder are rotatably connected to right-angle connecting rods, the surface of the chassis is fixedly connected to a support column, the bending part of the right-angle connecting rod is rotatably connected to the top side of the support column through a rotating rod, the top of the support column is located on one side of the right-angle connecting rod and is rotatably connected to a strip connecting rod through a rotating rod, the end of the right-angle connecting rod is movably connected to a Y-shaped connecting rod, the end of the strip connecting rod is movably connected to the surface of the Y-shaped connecting rod, and the end of the Y-shaped connecting rod is fixedly connected to a support block.

[0011] By adopting the above technical solution, the tube profile can be stably clamped by the inner support assembly.

[0012] Furthermore, the ends of the cross pad in four directions are all provided with the same inner support components.

[0013] By adopting the above technical solution, the same thrust is applied through the same inner support assembly to ensure stable fixation of the inner support of the tube profile. Beneficial Effects

[0014] The utility model provides a floating self-centering eight-claw chuck, which has the following beneficial effects compared with the prior art:

[0015] 1. The floating self-centering eight-jaw chuck places the workpiece to be tested in the middle of the clamping assembly and then tightens the clamping assembly, wherein the movable block is first pushed so that the arc plate at the end of the movable block presses against the surface of the workpiece to be tested, the internal spring is contracted as much as possible, and finally the positioning pin is tightened to complete the clamping of the workpiece to be tested, so that the multiple arc plates set at the end of the clamping jaws can better fit the surface of the workpiece to be tested, making the clamping more efficient.

[0016] 2. The floating self-centering eight-jaw chuck drives the cross pad to move through the hydraulic rod. When the cross pad moves, it will drive the right-angle connecting rod on the surface of the cylinder to move, and the right-angle connecting rod drives the Y-shaped connecting rod to move. The Y-shaped connecting rod is constrained by the strip connecting rod and the right-angle connecting rod at the top of the supporting column. The support block at the end of the Y-shaped connecting rod expands outward until it rests against the inner wall of the tube profile, so that the clamping device can perform dual clamping of the hollow tube profile by internal support and external retraction, and even lighter tube profiles can be stably clamped. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the implementation scheme of the utility model or the technical scheme in the prior art, the drawings required for use in the implementation scheme or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some implementation schemes of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the auxiliary installation component structure of the utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the clamping assembly of the utility model;

[0021] Figure 4 It is a cross-sectional view of the clamping assembly structure of the utility model;

[0022] Figure 5 It is a schematic diagram of the structure of the drive assembly of the utility model;

[0023] Figure 6 It is a schematic diagram of the overall structure of the inner support assembly of the utility model;

[0024] Figure 7 It is a partial structural schematic diagram of the inner support component of the utility model.

[0025] In the figure: 1. chassis; 2. auxiliary mounting assembly; 21. fan-shaped mounting plate; 22. slide block; 3. drive assembly; 31. hydraulic rod; 32. cross pad; 4. clamping assembly; 41. movable block; 42. positioning pin; 43. T-shaped protrusion; 44. spring; 45. connecting cylinder; 46. protruding column; 47. arc plate; 5. inner support assembly; 51. cylinder; 52. right-angle connecting rod; 53. strip connecting rod; 54. supporting column; 55. Y-shaped connecting rod; 56. supporting block. DETAILED DESCRIPTION

[0026] It should be noted that in the description of the embodiments of the present application, the terms "front, rear", "left, right", "up, down", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present application. The terms "install", "connect", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0027] The present application is further described in detail below through drawings and examples.

[0028] Reference Figures 1 to 7The embodiment of the present application provides a floating self-centering eight-claw chuck, including a chassis 1, a clamping assembly 4 is arranged above the chassis 1, the clamping assembly 4 includes a movable block 41, a positioning pin 42 is threadedly penetrated on the surface of the movable block 41, a T-shaped protrusion 43 is fixedly connected to the bottom surface of the movable block 41, a hole is opened at the front end of the movable block 41, a spring 44 is fixedly connected to the inner wall of the hole at the front end of the movable block 41, a connecting tube 45 is fixedly connected to the top of the spring 44, a convex column 46 is fixedly connected to the top surface of the connecting tube 45, and a convex column 46 is movably penetrated on the surface of the convex column 46. A rotating shaft is passed through, and the surface of the boss 46 is rotatably connected with an arc plate 47 through the rotating shaft. An auxiliary mounting assembly 2 is arranged on the surface of the chassis 1, and the auxiliary mounting assembly 2 includes a fan-shaped mounting disk 21, and a slide block 22 is fixedly connected to the surface of the fan-shaped mounting disk 21; the T-shaped boss 43 is slidably connected inside the slide block 22; a driving assembly 3 is arranged on the bottom surface of the chassis 1, and the driving assembly 3 includes a hydraulic rod 31, and the output end of the hydraulic rod 31 movably passes through the surface of the chassis 1, and a cross pad 32 is fixedly connected to the end face of the output end of the hydraulic rod 31.

[0029] In this embodiment, all structures are built on the basis of the chassis 1. When the device is used for clamping, the workpiece to be tested is placed in the middle of the clamping assembly 4, and then the clamping assembly 4 is tightened, wherein the movable block 41 is first pushed so that the arc plate 47 at the end of the movable block 41 is pressed against the surface of the workpiece to be tested, and the internal spring 44 is contracted as much as possible, and finally the positioning pin 42 is tightened to complete the clamping of the workpiece to be tested.

[0030] Reference Figures 1 to 7 In one aspect of the present embodiment, an inner support assembly 5 is arranged on the periphery of the cross pad 32, and the inner support assembly 5 includes a cylinder 51, which is fixedly connected to the four sides of the cross pad 32, and the two ends of the cylinder 51 are rotatably connected to the right-angle connecting rod 52, and the surface of the chassis 1 is fixedly connected to a support column 54, and the bending part of the right-angle connecting rod 52 is rotatably connected to the top side of the support column 54 through a rotating rod, and the top of the support column 54 is located on one side of the right-angle connecting rod 52 and is rotatably connected to a strip connecting rod 53 through a rotating rod, and the end of the right-angle connecting rod 52 is movably connected to a Y-shaped connecting rod 55, and the end of the strip connecting rod 53 is movably connected to the surface of the Y-shaped connecting rod 55, and the end of the Y-shaped connecting rod 55 is fixedly connected to a support block 56; the same inner support assembly 5 is arranged at the ends of the four directions of the cross pad 32.

[0031] In this embodiment, when the object to be tested is a tube profile, the inner support assembly 5 and the drive assembly 3 need to be installed in the middle of the chassis 1, and the object is placed in the middle of the chassis 1, and the hydraulic rod 31 is started. The hydraulic rod 31 drives the cross pad 32 to move. When the cross pad 32 moves, it will drive the right-angle connecting rod 52 on the surface of the cylinder 51 to move, and the right-angle connecting rod 52 drives the Y-shaped connecting rod 55 to move. The Y-shaped connecting rod 55 is constrained by the strip connecting rod 53 and the right-angle connecting rod 52 at the top of the support column 54. The support block 56 at the end of the Y-shaped connecting rod 55 expands outward until it contacts the inner wall of the tube profile.

[0032] Working principle: In this embodiment, all structures are built on the basis of the chassis 1. When the device is used for clamping, the workpiece to be tested is placed in the middle of the clamping assembly 4, and then the clamping assembly 4 is tightened, wherein the movable block 41 is first pushed so that the arc plate 47 at the end of the movable block 41 is against the surface of the workpiece to be tested, and the internal spring 44 is contracted as much as possible, and finally the positioning pin 42 is tightened to complete the clamping of the workpiece to be tested.

[0033] In this embodiment, when the object to be tested is a tube profile, the inner support assembly 5 and the drive assembly 3 need to be installed in the middle of the chassis 1, and the object is placed in the middle of the chassis 1, and the hydraulic rod 31 is started. The hydraulic rod 31 drives the cross pad 32 to move. When the cross pad 32 moves, it will drive the right-angle connecting rod 52 on the surface of the cylinder 51 to move, and the right-angle connecting rod 52 drives the Y-shaped connecting rod 55 to move. The Y-shaped connecting rod 55 is constrained by the strip connecting rod 53 and the right-angle connecting rod 52 at the top of the support column 54. The support block 56 at the end of the Y-shaped connecting rod 55 expands outward until it contacts the inner wall of the tube profile.

[0034] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0035] Although the embodiments of the present application have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A floating self-centering eight-jaw chuck, comprising a chassis (1), characterized in that: A clamping assembly (4) is arranged above the chassis (1), and the clamping assembly (4) comprises a movable block (41), a surface of the movable block (41) is threadedly connected with a positioning pin (42), a bottom surface of the movable block (41) is fixedly connected with a T-shaped protrusion (43), a front end of the movable block (41) is provided with a hole, an inner wall of the front end hole of the movable block (41) is fixedly connected with a spring (44), a top of the spring (44) is fixedly connected with a connecting tube (45), and a top surface of the connecting tube (45) is fixedly connected to A convex column (46) is provided, a rotating shaft movably passing through the surface of the convex column (46), and a curved plate (47) is rotatably connected to the surface of the convex column (46) via the rotating shaft. A driving assembly (3) is provided on the bottom surface of the chassis (1), and the driving assembly (3) comprises a hydraulic rod (31). The output end of the hydraulic rod (31) movably passes through the surface of the chassis (1), and a cross pad (32) is fixedly connected to the end surface of the output end of the hydraulic rod (31), and an inner support assembly (5) is provided on the periphery of the cross pad (32).

2. A floating self-centering eight-jaw chuck according to claim 1, characterized in that: An auxiliary mounting assembly (2) is provided on the surface of the chassis (1), wherein the auxiliary mounting assembly (2) comprises a sector-shaped mounting plate (21), and a slide block (22) is fixedly connected to the surface of the sector-shaped mounting plate (21).

3. A floating self-centering eight-jaw chuck according to claim 2, characterized in that: The T-shaped protrusion (43) is slidably connected inside the slide groove block (22).

4. A floating self-centering eight-jaw chuck according to claim 1, characterized in that: The inner support assembly (5) comprises a cylinder (51), wherein the cylinder (51) is fixedly connected to the sides of the cross pad (32), and the two ends of the cylinder (51) are rotatably connected to right-angle connecting rods (52). The surface of the chassis (1) is fixedly connected to a support column (54), and the bending part of the right-angle connecting rod (52) is rotatably connected to the top side of the support column (54) through a rotating rod. The top of the support column (54) is located on one side of the right-angle connecting rod (52) and is rotatably connected to a strip connecting rod (53) through a rotating rod. The end of the right-angle connecting rod (52) is movably connected to a Y-shaped connecting rod (55), and the end of the strip connecting rod (53) is movably connected to the surface of the Y-shaped connecting rod (55). The end of the Y-shaped connecting rod (55) is fixedly connected to a support block (56).

5. A floating self-centering eight-jaw chuck according to claim 1, characterized in that: The ends of the cross pad (32) in four directions are all provided with the same inner support assembly (5).

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