Adjustable four-jaw linkage chuck

Abstract

The invention relates to an adjustable four-jaw linkage chuck which comprises a chuck body (1) and is characterized by further comprising two movable clamping jaws (7), two fixed clamping jaws (8), two movable adjusting mechanisms and two linkage adjusting mechanisms. The movable adjusting structure comprises a threaded rod (5) and a threaded rod fixing block (6), the threaded rod (5) is a cylinder with external threads, and the threaded rod (5) is installed on the rack (3) through the threaded rod fixing block (6); the threaded rod fixing block (6) is a cuboid with a round hole in the middle, and is fixedly arranged on the rack (3) through a screw; compared with an existing four-jaw single-acting chuck and an existing four-jaw self-centering chuck, the four-jaw self-centering chuck not only can clamp a workpiece and ensure that the workpiece does not displace in the machining process, but also can realize flexible and accurate movement of the workpiece between relative positions in the plane of the four-jaw chuck under the condition of clamping the workpiece, so that the working efficiency is improved. And the moving efficiency of the workpiece and the accuracy of repeated adjustment are improved.

Description

Technical Field

[0001] The present invention relates to the structural design of an adjustable four-jaw linkage chuck. Specifically, after a workpiece is clamped and fixed on the four-jaw chuck once, without loosening the jaws, by adjusting the linkage adjustment mechanism on the four-jaw chuck, the relative position of the workpiece in the plane of the four-jaw chuck can be adjusted. Background Art

[0002] Four-jaw chucks are mainly used for clamping and fixing workpieces during turning or milling processes to prevent relative movement of the workpiece during processing, which may cause the workpiece to be out of tolerance during processing. However, the structures of four-jaw chucks on the market are relatively simple at present, mainly four-jaw independent chucks or four-jaw self-centering chucks, which can only clamp the workpiece. If the clamped workpiece needs to be moved in the plane of the four-jaw chuck, all four jaws need to be loosened, the product needs to be manually adjusted to the required position, and then the four jaws are tightened to clamp the workpiece.

[0003] Therefore, after clamping the workpiece, the existing four-jaw independent chucks or four-jaw self-centering chucks have problems such as low adjustment efficiency and poor repeat adjustment accuracy in adjusting the relative position of the workpiece. Summary of the Invention

[0004] The present invention is an adjustable four-jaw linkage chuck. After clamping the workpiece with this four-jaw chuck, it can achieve free adjustment of the relative position of the workpiece in a certain range in the plane of the four-jaw chuck without loosening the jaws, so as to overcome the deficiencies of the prior art.

[0005] An adjustable four-jaw linkage chuck, including a chuck body 1, characterized in that it further includes two movable jaws 7, two fixed jaws 8, two movable adjustment mechanisms and two linkage adjustment mechanisms; the movable adjustment structure includes a threaded rod 5 and a threaded rod fixing block 6, the threaded rod 5 is a cylinder with external threads, and it is installed on the rack 3 through the threaded rod fixing block 6; the threaded rod fixing block 6 is a cuboid with a round hole in the middle, and it is installed and fixed on the rack 3 through screws; the linkage adjustment mechanism includes a gear rod 2, a rack 3 and a gear rod fixing block 4, the gear rod fixing block 4 is a cuboid with a round hole in the middle, and it is installed and fixed on the chuck body 1 through screws; and the gear rod fixing block 4 fixes the gear rod 2 on the chuck body 1; the chuck body 1 is a disc with a set thickness, and two inverted "T" - shaped chutes 11 are machined on one side, and the two inverted "T" - shaped chutes 11 are perpendicular and intersecting; the cross - sections of the two racks 3 are both inverted "T" - shaped structures, and threads 31 are machined on the side surface of one end of the rack 3; among them, there is an upward groove on the lower surface in the middle of one rack, and a downward groove on the upper surface in the middle of the other rack 3; the two racks 3 are both installed in the inverted "T" - shaped chutes 11 of the chuck body 1 and are arranged in a perpendicular cross - "bridge" shape, the gear rod 2 is a cylinder with external threads, and it is installed on the chuck body 1 through the gear rod fixing block 4, and the gear rod 2 and the rack 3 form a thread pair, and by rotating the gear rod 2, the relative position of the rack 3 in the inverted T - shaped chute 11 of the chuck body 1 can be adjusted; it can realize the movement of the two racks 3 in mutually perpendicular directions respectively;

[0006] The movable jaw 7 is a "Γ" - shaped structure, and threaded holes are machined on the side surface of the "Γ" - shaped structure. The movable jaw 7 is installed on the threaded rod 5 through its threaded holes; the movable jaw 7 and the threaded rod 5 form a thread pair, and by rotating the threaded rod 5, the relative position of the movable jaw on the rack can be adjusted; the fixed jaw is a "Γ" - shaped structure, and it is installed and fixed on the rack 3 through screws.

[0007] The diameter of the chuck body 1 is greater than 3 cm.

[0008] The length of the gear rod 2 is less than 15 cm.

[0009] Beneficial effects

[0010] When the present invention is used, first place the workpiece between the four jaws, drive the movable jaw to move towards the workpiece by rotating the threaded rod, and use the four jaws to clamp the workpiece; then rotate the gear rod to drive the rack to move in the T - shaped chute of the chuck body, and the workpiece can be adjusted to the required position in the plane of the four - jaw chuck.

[0011] Compared with the existing four-jaw independent chuck and four-jaw self-centering chuck, the present invention can not only clamp the workpiece to ensure that the workpiece does not displace during the machining process, but also, when the workpiece is clamped, can flexibly and accurately move the relative positions of the workpiece within the plane of the four-jaw chuck, improving the moving efficiency of the workpiece and the accuracy of repeated adjustment. Description of the Drawings

[0012] Figure 1 , Structural schematic diagram of the present invention;

[0013] Figure 2 , is Figure 1 Cross-sectional view A-A thereof; Structural schematic diagram of the movable jaw;

[0014] Figure 3 , Assembly structural schematic diagram of two movable adjustment mechanisms and two linkage adjustment mechanisms of the present invention;

[0015] Figure 4 , Structural schematic diagram of the fixed jaw of the present invention;

[0016] Figure 5 , Structural schematic diagram of the movable jaw of the present invention.

[0017] Among them, 1 is the chuck body, 2 is the gear rod, 3 is the rack, 4 is the gear rod fixing block, 5 is the threaded rod, 6 is the threaded rod fixing block, 7 is the movable jaw, 8 is the fixed jaw, 11 is the inverted "T" shaped chute, 31 is the thread, and 71 is the threaded hole. Detailed Description of the Invention

[0018] An adjustable four-jaw linkage chuck of the present invention has a chuck body, two movable jaws, two fixed jaws, two movable adjustment mechanisms and two linkage adjustment mechanisms. The movable adjustment structure includes a threaded rod and a threaded rod fixing block, and the linkage adjustment mechanism includes a gear rod, a rack and a gear rod fixing block.

[0019] The above-mentioned chuck body is a disc with a certain thickness, and two "T-shaped" chutes are machined on one side, and the two T-shaped chutes are perpendicular and cross each other.

[0020] The above-mentioned two racks are both in a "┻-shaped" structure, and threads are machined on one side of the rack; among them, the middle part of one rack protrudes, and the middle part of the other rack is concave. The two racks are both installed in the T-shaped chute of the chuck body and are arranged in a vertical cross "bridge" type, so that the two racks can move in mutually perpendicular directions.

[0021] The above-mentioned gear rod is a cylinder with external threads, and it is installed on the chuck body through the gear rod fixing block. The gear rod and the rack form a thread pair, and by rotating the gear rod, the relative position of the rack in the T-shaped chute of the chuck body can be adjusted.

[0022] The above-mentioned gear rod fixing block is a cuboid with a circular hole in the middle, and it is installed and fixed on the chuck body by screws.

[0023] The above-mentioned threaded rod is a cylinder with external threads, and it is installed on the rack through the threaded rod fixing block.

[0024] The above-mentioned threaded rod fixing block is a cuboid with a circular hole in the middle, and it is installed and fixed on the rack by screws.

[0025] The above-mentioned movable jaw is of a "Γ-shaped" structure, and threaded holes are machined on the side of the "Γ-shaped". The movable jaw is installed on the threaded rod through its threaded holes. The movable jaw and the threaded rod form a screw pair, and the relative position of the movable jaw on the rack can be adjusted by rotating the threaded rod.

[0026] The above-mentioned fixed jaw is of a "Γ-shaped" structure, and it is installed and fixed on the rack by screws.

[0027] Taking the clamping and linkage adjustment of a cylindrical workpiece on a four-jaw chuck as an example.

[0028] Step 1: Rotate the two threaded rods to move both movable jaws to the outermost side of the four-jaw chuck;

[0029] Step 2: Place the cylindrical workpiece between the four jaws of the four-jaw chuck;

[0030] Step 3: Rotate the two threaded rods to move the two movable jaws into contact with the workpiece and clamp the workpiece;

[0031] Step 4: Rotate the gear rod in the horizontal direction, causing the corresponding rack to move in the T-shaped chute of the chuck body, thereby driving the workpiece to move left and right in the horizontal direction;

[0032] Step 5: Rotate the gear rod in the vertical direction, causing the corresponding rack to move in the T-shaped chute of the chuck body, thereby driving the workpiece to move up and down in the vertical direction.

Claims

1. An adjustable four-jaw linkage chuck, comprising a chuck body (1), characterized in that: The invention also comprises two movable clamping claws (7), two fixed clamping claws (8), two movable adjustment mechanisms and two linkage adjustment mechanisms; the movable adjustment structure comprises a threaded rod (5) and a threaded rod fixing block (6); the threaded rod (5) is a cylinder with external threads, which is mounted on the rack (3) through the threaded rod fixing block (6); the threaded rod fixing block (6) is a rectangular parallelepiped with a circular hole in the middle, which is fixed on the rack (3) by screws; the linkage adjustment mechanism comprises a gear rod (2), a rack (3) and a gear rod fixing block (4); the gear rod fixing block (4) is a rectangular parallelepiped with a circular hole in the middle, which is fixed on the chuck body (1) by screws; and the gear rod fixing block (4) fixes the gear rod (2) on the chuck body (1); the chuck body (1) is a disc with a set thickness, one side of which is processed with two The two inverted "T"-shaped slide grooves (11) are perpendicular to each other; the cross-sections of the two racks (3) are both inverted "T"-shaped structures, and the side surfaces of one end of the racks (3) are processed with threads (31); wherein the lower surface in the middle of one rack has an upward groove, and the upper surface in the middle of the other rack (3) has a downward groove; the two racks (3) are both installed in the inverted "T"-shaped slide groove (11) of the chuck body (1), and are arranged in a vertically crossed "bridge" manner; the gear rod (2) is a cylinder with external threads, which is installed on the chuck body (1) through a gear rod fixing block (4); the gear rod (2) and the rack (3) form a thread pair, and the relative position of the rack (3) in the T-shaped slide groove (11) of the chuck body (1) can be adjusted by rotating the gear rod (2); the two racks (3) can be moved separately in directions perpendicular to each other; The movable clamping claw (7) is a "Γ"-shaped structure, and a threaded hole (71) is processed on the side of the "Γ"-shaped structure. The movable clamping claw (7) is installed on the threaded rod (5) through its threaded hole; the movable clamping claw (7) and the threaded rod (5) form a thread pair, and the relative position of the movable clamping claw on the rack can be adjusted by rotating the threaded rod (5); the fixed clamping claw is a "Γ"-shaped structure, and is fixed on the rack (3) by screws.

2. The adjustable four-jaw linkage chuck according to claim 1, characterized in that: The chuck body (1) has a diameter greater than 3 centimeters.

3. The adjustable four-jaw linkage chuck according to claim 1, characterized in that: The length of the gear rod (2) is less than 15 centimeters.

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