Self-centering chuck

Abstract

The utility model discloses a self-centering chuck, comprising: disc body, disc body is opened with through -hole, is symmetrically slid in the first radial direction of disc body and is provided with two first clamping jaws, is symmetrically slid in the second radial direction of disc body and is provided with two second clamping jaws, is provided with two drive cylinders in disc body, and the output of drive cylinder is connected with sliding block, and sliding block is slid in slide rail, and the length direction of slide rail is parallel with the axial direction of disc body, and the both sides of sliding block are respectively articulated with first connecting rod, and the same side end of clamping jaw is provided with second connecting rod, and second connecting rod passes through the lateral wall of disc body and is articulated with corresponding first connecting rod, before the clamping of pipe fitting, pipe fitting is located between two first clamping jaws, two second clamping jaws, with two first clamping jaws, two second clamping jaws are close to each other, even if the axis of pipeline does not coincide with the axis of pipeline, but through the direction of first clamping jaw, second clamping jaw, can finally make the axis of pipeline coincide with the axis of disc body, completes the automatic centering operation to pipeline.

Description

Technical Field

[0001] This utility model relates to pneumatic chucks, and in particular to self-centering chucks. Background Technology

[0002] Before operating equipment such as pipe cutting machines and pipe welding machines, the pipe fittings need to be fixed. This step is usually achieved by a chuck. The specific fixing method is that the upper and lower sets of jaws move relative to the left and right sets of jaws to clamp the pipe fittings together.

[0003] The existing chuck has four jaws controlled by independent drive mechanisms, which has obvious defects. If the stroke of any drive mechanism deviates, the pipe cannot be centered and clamped on the chuck. That is, the pipe axis is not parallel to the chuck axis, and the pipe is in a misaligned clamping state. Cutting the pipe in this case will result in a sharp corner at the end of the pipe instead of a flat cut surface, which will ultimately fail to meet the requirements of subsequent processing or use.

[0004] In summary, how to achieve self-centering clamping of pipe fittings using a chuck, so that the axis of the pipe fitting is parallel to the axis of the chuck, has become an urgent problem for researchers in this field to solve. Utility Model Content

[0005] The technical problem to be solved by this utility model is: how to achieve self-centering and clamping of pipe fittings through a chuck, so that the axis of the pipe fittings is parallel to the axis of the chuck.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: This utility model is a self-centering chuck, comprising: a chuck body, wherein a through hole is provided on the chuck body, two first jaws are symmetrically arranged in a first radial direction of the chuck body, and two second jaws are symmetrically arranged in a second radial direction of the chuck body, wherein the first radial direction and the second radial direction are arranged perpendicularly, and the first jaws and the second jaws are slidably arranged on the outer side of the chuck body. A drive cylinder is provided in both the first radial direction and the second radial direction within the disc body. The output end of the drive cylinder is connected to a slider, which is slidably mounted on a slide rail. The length direction of the slide rail is parallel to the axial direction of the disc body. The slider is hinged to two sides by a first connecting rod, and a second connecting rod is provided at the same side end of the two first or second grippers. The second connecting rod passes through the outer wall of the disc and is hinged to the corresponding first connecting rod. When the two drive cylinders are activated, the two second grippers move relative to each other and approach each other, and the two first grippers move relative to each other and approach each other, clamping the pipe in the space formed by the two second grippers and the two first grippers.

[0007] Furthermore, the ends of the first and second grippers are provided with sliding holes, and four sliding rods are provided on the outer side of the disc body. The sliding holes at the same side ends of the two first grippers or the two second grippers are slidably connected to one of the sliding rods.

[0008] Furthermore, the ends of two adjacent slide rods are connected to the same support, and four supports are disposed on the outer side wall of the disc body, with the four supports located at the corners of the square trajectory.

[0009] Furthermore, the outer wall of the disc body is provided with two sliding grooves, which are respectively located below two adjacent sliding rods. The second connecting rod passes through the sliding grooves and connects with the first connecting rod.

[0010] Furthermore, a flat part is provided on the second connecting rod so that the thickness of the connecting rod matches the width of the groove.

[0011] Furthermore, the first and second grippers are provided with rotating shafts that contact the tubing.

[0012] The beneficial effects of this utility model are as follows: This utility model is a self-centering chuck. Before clamping the pipe fitting, the pipe fitting is located between the two first jaws and the two second jaws. As the two first jaws and the two second jaws approach each other, even if the axis of the pipe does not coincide with the axis of the chuck, the axis of the pipe can eventually be aligned with the axis of the chuck body through the guidance of one of the first jaws or one of the second jaws, thus completing the automatic centering operation of the pipe. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] Figure 1 This is a structural schematic diagram of this embodiment; Figure 2 This is a schematic diagram of the structure of the drive cylinder inside the disc; Figure 3 This is a diagram showing the engagement of the first and second grippers. Detailed Implementation

[0015] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0016] See Figure 1-3This embodiment is a self-centering chuck, comprising: a disc body 1, wherein a through hole 11 is provided on the disc body 1 for pipe fittings to pass through; two first jaws 01 are symmetrically arranged in a first radial direction (left-right direction) of the disc body 1, and two second jaws 02 are symmetrically arranged in a second radial direction (up-down direction) of the disc body 1, wherein the first radial direction and the second radial direction are perpendicularly arranged, and the first jaws 01 and the second jaws 02 are slidably disposed on the outer side of the disc body 1; thus, the two second jaws 02 can move up and down, and the two first jaws 01 can move left and right; Two drive cylinders 2 are provided in the first radial direction and the second radial direction within the disc body 1, respectively displacing the left side and the upper side within the disc body 1. One drive cylinder is used to drive the two first grippers 01 to move horizontally closer or further away, and the other drive cylinder is used to drive the two second grippers 02 to move vertically closer or further away. The output end of the drive cylinder 2 is connected to a slider 3, which is slidably mounted on a slide rail 4. The length direction of the slide rail 4 is parallel to the axial direction of the disc body 1. The slider 3 is hinged to two sides by a first connecting rod 51, and a second connecting rod 52 is provided on the same side of the two first grippers 01 or the second grippers 02. The second connecting rod 52 passes through the outer wall 12 of the disc body 1 and is hinged to the corresponding first connecting rod 51. When the two drive cylinders 2 are started, the angle of the V-angle formed between the two first connecting rods 51 gradually decreases. Through the linkage of the second connecting rod 52, the two first clamping claws 01 and the two second clamping claws 02 move closer together, clamping the pipe in the space formed by the two second clamping claws 02 and the two first clamping claws 01. Before clamping the pipe fitting, the pipe fitting is located between two first jaws 01 and two second jaws 02. As the two first jaws 01 and two second jaws 02 approach each other, even if the axis of the pipe does not coincide with the axis of the pipe, the axis of the pipe can eventually be aligned with the axis 03 of the disc body 1 by the guidance of one of the first jaws 01 or one of the second jaws 02, thus completing the automatic alignment operation of the pipe.

[0017] See Figure 1-3 In some possible embodiments, the ends of the first gripper 01 and the second gripper 02 are provided with sliding holes 04, and the outer side of the disc body 1 is provided with four sliding rods 05. The sliding holes 04 at the same side ends of the two first grippers 01 or the two second grippers 02 are slidably connected to one of the sliding rods 05. In this embodiment, four slide rods 05 are provided on the outer side wall of the disc body 1. Two horizontal slide rods 05 are provided at the top and bottom positions, and two vertical slide rods 05 are provided at the left and right positions. Slide rods 05 are inserted through the sliding holes 04 at the top and bottom of the first gripper 01, and slide rods 05 are inserted through the sliding holes 04 at the left and right ends of the second gripper 02. The slide rods 05 are guided by the sliding holes 04, so that the first gripper 01 and the second gripper 02 can move in a straight line.

[0018] See Figure 1-3 In some possible embodiments, the ends of two adjacent slide rods 05 are connected to the same support 06, and four supports 06 are disposed on the outer side wall 12 of the disc body 1, with the four supports 06 located at the corners of the square track. In this embodiment, the support 06 is located at the lower left, lower right, upper left, and upper right of the outer side wall of the disc body 1, respectively, and the support 06 connects the ends of two mutually perpendicular sliding rods 05.

[0019] See Figure 1-3 In some possible embodiments, the outer side wall of the disc body 1 is provided with two sliding grooves 07, the two sliding grooves 07 are respectively below the two adjacent sliding rods 05, and the second connecting rod 52 passes through the sliding grooves 07 and is connected to the first connecting rod 51. In this embodiment, a groove 07 is provided for the second connecting rod 52 to pass through and connect with the first connecting rod 51.

[0020] See Figure 1-3 In some possible embodiments, a flat part 521 is provided on the second connecting rod 52, so that the thickness of the connecting rod 52 matches the width of the groove 07; In this embodiment, by setting the flat position 521, the second connecting rod 52 and the slide groove 07 are in surface contact, which ensures the accurate stroke of the second connecting rod 52, and further ensures the accurate stroke of the first gripper 01 and the second gripper 02 during the movement.

[0021] See Figure 1-3 In some possible embodiments, the first gripper 01 and the second gripper 02 are provided with a rotating shaft 08 that contacts the tube. In this embodiment, the rotating shaft 08 and the pipe are in point contact. During the pipe cutting process, wear between the pipe and the clamping jaws due to surface contact is avoided. In addition, after the pipe cutting is completed, the two drive cylinders 2 only need to perform a slight reset, and the pipe can move between the first clamping jaw 01 and the second clamping jaw 02. At this time, the pipe is in contact with the rotating shaft 08, and the pipe moves in a straight line, driving the rotating shaft 08 to rotate.

[0022] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A self-aligning chuck, characterized in that, Includes: a disc body, wherein a through hole is formed in the disc body, two first grippers are symmetrically arranged in a first radial direction of the disc body, and two second grippers are symmetrically arranged in a second radial direction of the disc body, wherein the first radial direction and the second radial direction are perpendicular to each other, and the first grippers and the second grippers are slidably arranged on the outer side of the disc body; A drive cylinder is provided in both the first radial direction and the second radial direction within the disc body. The output end of the drive cylinder is connected to a slider, which is slidably mounted on a slide rail. The length direction of the slide rail is parallel to the axial direction of the disc body. The slider is hinged to two sides by a first connecting rod, and a second connecting rod is provided at the same side end of the two first or second grippers. The second connecting rod passes through the outer wall of the disc and is hinged to the corresponding first connecting rod. When the two drive cylinders are activated, the two second grippers move relative to each other and approach each other, and the two first grippers move relative to each other and approach each other, clamping the pipe in the space formed by the two second grippers and the two first grippers.

2. The self-centering chuck according to claim 1, characterized in that, The ends of the first and second grippers are provided with sliding holes, and four sliding rods are provided on the outer side of the disc body. The sliding holes at the same side ends of the two first grippers or the two second grippers are slidably connected to one of the sliding rods.

3. The self-centering chuck according to claim 2, characterized in that, The ends of two adjacent slide rods are connected to the same support, and four supports are set on the outer wall of the disc body, with the four supports located at the corners of the square track.

4. The self-centering chuck according to claim 3, characterized in that, The outer wall of the disc is provided with two sliding grooves, which are located below two adjacent sliding rods. The second connecting rod passes through the sliding grooves and is connected to the first connecting rod.

5. The self-centering chuck according to claim 4, characterized in that, The second connecting rod is fitted with a flat part, so that the thickness of the connecting rod matches the width of the groove.

6. The self-centering chuck according to claim 5, characterized in that, The first and second grippers are provided with rotating shafts that come into contact with the pipe fittings.

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