A machine tool chuck positioning device

Abstract

The application provides a machine tool chuck positioning device, and relates to the technical field of chucks, which comprises a disc body, a moving groove, a claw, a plurality of extension rods, a circular plate and a positioning hole; when the claw slides along the inner wall of the moving groove to the center hole of the disc body, the claw slides along one side of the circular plate; when the circular plate is attached to the surface of the claw, the workpiece can be supported by the disc body and the circular plate, which can avoid the problems of hand support fatigue, loose support, unstable clamping and the need for re-clamping, and can also stably position and fix the workpiece, prevent loosening during clamping, improve clamping efficiency, and when the circular plate is attached between the disc body and the claw, the moving groove is shielded, dust accumulation in the inner wall of the groove is reduced, and the dust is prevented from affecting the working mode of the claw and reducing the clamping stability.

Description

Technical Field

[0001] This application relates to the field of chuck technology, and in particular to a machine tool chuck positioning device. Background Technology

[0002] A chuck is a mechanical device used on a machine tool to clamp workpieces. It is a machine tool accessory that uses the radial movement of movable jaws evenly distributed on the chuck body to clamp and position the workpiece.

[0003] In practical use, it was found that for some tubular workpieces, when using a chuck for clamping, the workpiece must first be placed in the center hole of the chuck body, and then the clamping action is performed by the jaws. However, during the clamping process, the operator needs to continuously support the workpiece with their hands. This clamping method increases the labor intensity of the operator. On the other hand, if the workpiece becomes loose while being supported against the center hole of the chuck body, the workpiece may shift or shake, resulting in unstable clamping. Once unstable clamping occurs, in severe cases, the clamping operation may even need to be restarted. This not only wastes time and effort, but also greatly reduces the overall clamping efficiency. Utility Model Content

[0004] This application provides a machine tool chuck positioning device, which aims to solve the problems of high labor intensity, unstable clamping and low clamping efficiency when clamping tubular workpieces.

[0005] To address the aforementioned problems, this application provides a machine tool chuck positioning device, comprising a chuck body. The surface of the chuck body has multiple circumferentially distributed movable grooves, each of which is connected to a central hole in the chuck body. A chuck jaw is slidably connected to the inner wall of each movable groove. The device also includes multiple extension rods circumferentially connected to the chuck body, each extension rod located between two adjacent chuck jaws. A circular plate is connected between the surfaces of the multiple extension rods. The center of the circular plate has a positioning hole of the same size as the central hole in the chuck body. When a chuck jaw slides along the inner wall of the movable groove towards the central hole in the chuck body, the chuck jaw slides along one side of the circular plate.

[0006] In some implementations, when the circular plate and the surface of the extension rod are slidably connected, the surface of the circular plate is provided with a moving hole that fits with the surface of the extension rod, the surface of the disc is provided with a mounting groove corresponding to each extension rod, one end of the extension rod is fixedly connected to the inner wall of the mounting groove, the inner wall of the mounting groove is fixedly connected to a first limiting part sleeved on the surface of the extension rod, and the other end of the extension rod is connected to a second limiting part.

[0007] In some implementations, when the circular plate moves along the surface of the extension rod after disengaging from the second limiting part and fits against the surface of the disc, the surface of the circular plate is provided with a fitting groove that has the same shape as the gripper clamping surface, and the first limiting part fixes the circular plate.

[0008] In some implementations, when the circular plate moves along the surface of the extension rod after disengaging from the first limiting part and is fixed to the second limiting part, the outer contour surface of the circular plate is provided with multiple circumferentially distributed pull holes.

[0009] In some implementations, when both the first limiting part and the second limiting part adopt a magnetic structure, the circular plate is made of iron.

[0010] In some implementations, when the second limiting part and the extension rod are detachably connected, the second limiting part is sleeved on the surface of the extension rod, a rotating block is fixedly connected to the surface of the second limiting part, a lead screw is fixedly connected to the surface of the rotating block, and a threaded groove that mates with the lead screw is opened at the end of the extension rod that is in contact with the rotating block.

[0011] In some implementations, the rotating block has a hexagonal structure.

[0012] By adopting the above technical solution, this application has the following beneficial effects compared with the prior art:

[0013] When the circular plate is attached to the surface of the chuck, it is to ensure that the workpiece can be supported by the disc and the circular plate. This avoids problems such as hand fatigue, unstable clamping due to loose support, and the need for re-clamping. It also stabilizes and fixes the workpiece, prevents loosening during clamping, and improves clamping efficiency. When the circular plate is attached between the disc and the chuck, it acts as a shield for the moving groove, reducing the accumulation of dust on the inner wall of the groove and preventing dust from affecting the working mode of the chuck and reducing clamping stability. Attached Figure Description

[0014] To more clearly illustrate the related technologies or the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the related technologies or the embodiments of this application will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application, and not all embodiments. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 A schematic diagram of the overall structure of a machine tool chuck positioning device provided in this application embodiment. Figure 1 ;

[0016] Figure 2 for Figure 1Exploded view of the connection between the central extension rod and the disk body;

[0017] Figure 3 for Figure 2 Exploded view of the connection between the central extension rod and the circular plate;

[0018] Figure 4 for Figure 3 Schematic diagram of the connection structure between the second limiting part and the rotating block;

[0019] Figure 5 A schematic diagram of the overall structure of a machine tool chuck positioning device provided in this application embodiment. Figure 2 .

[0020] The labels in the above figures are as follows: 1. Disc body; 11. Moving groove; 12. Claw; 13. Mounting groove; 2. Extension rod; 21. Threaded groove; 3. Circular plate; 31. Positioning hole; 32. Moving hole; 33. Fitting groove; 34. Pulling port; 4. First limiting part; 5. Second limiting part; 51. Rotating block; 52. Lead screw. Detailed Implementation

[0021] Example 1: Refer to Figure 1 , Figure 2 and Figure 5 A machine tool chuck positioning device includes a chuck body 1. The surface of the chuck body 1 has multiple circumferentially distributed movable grooves 11, and each movable groove 11 is connected to the central hole of the chuck body 1. A jaw 12 is slidably connected to the inner wall of the movable groove 11. The chuck structure in this embodiment is mainly designed based on the principle of the three-jaw chuck in the prior art. As for the specific movement method of the jaw 12, such as what kind of driving mechanism (such as a lead screw and nut mechanism, gear and rack mechanism, etc.) drives the jaw 12 to move in the movable groove 11, and how to achieve synchronous movement of the jaw 12 to ensure uniform clamping of the workpiece, all can refer to the existing mature three-jaw chuck technology, which will not be elaborated here.

[0022] In practical applications, for some tubular workpieces, before using the chuck 12 for clamping, the workpiece must first be placed in the central hole of the disc 1, and then clamped by the chuck 12. However, during the clamping process, the operator needs to continuously support the workpiece with their hands. This clamping method has two drawbacks: firstly, it increases the labor intensity of the operator; secondly, if the workpiece becomes loose while being supported by the operator in the central hole of the disc 1, it will lead to unstable workpiece clamping, and may even require a re-clamping operation, which undoubtedly reduces clamping efficiency. In view of the above, this embodiment has multiple extension rods 2 circumferentially connected to the disc 1, and each extension rod 2 is located between two adjacent chucks 12. A circular plate 3 is connected between the surfaces of the multiple extension rods 2. The center of the surface of the circular plate 3 is provided with a positioning hole 31 of the same size as the central hole of the disc 1. When the chuck 12 slides closer to the central hole of the disc 1 along the inner wall of the moving groove 11, the chuck 12 slides along one side of the circular plate 3. Figure 1 As shown.

[0023] In the above technical solution, since the central hole of the disc 1 corresponds to the positioning hole 31 on the circular plate 3, and the shape, size and dimensions are customized according to the tubular workpiece, when clamping the workpiece, the tube is placed along the surface of the positioning hole 31, so that the workpiece abuts against the inner wall of the central hole of the disc 1. At this time, the workpiece can effectively avoid the problems mentioned above, such as fatigue of hand support, unstable clamping due to loose support, and the need for re-clamping, under the joint support of the disc 1 and the circular plate 3. Moreover, this support method can provide stable positioning and fixation for the workpiece, avoid the workpiece from loosening during the clamping process, and thus significantly improve the clamping efficiency.

[0024] Example 2: Refer to Figures 1-5 A machine tool chuck positioning device, based on the above embodiment one, differs in that, when the circular plate 3 and the extension rod 2 are slidably connected, the surface of the circular plate 3 is provided with a moving hole 32 that fits against the surface of the extension rod 2, the surface of the disc body 1 is provided with a mounting groove 13 corresponding to each extension rod 2, one end of the extension rod 2 is fixedly connected to the inner wall of the mounting groove 13, the inner wall of the mounting groove 13 is fixedly connected with a first limiting part 4 sleeved on the surface of the extension rod 2, and the other end of the extension rod 2 is connected with a second limiting part 5. When both the first limiting part 4 and the second limiting part 5 are magnetic structures, the circular plate 3 is made of iron.

[0025] In the above technical solution, when the circular plate 3 is pulled, causing it to detach from the magnetically attracted second limiting part 5, the circular plate 3 can move along the surface of the extension rod 2 until it adheres to the surface of the disc body 1. At this time, since the surface of the circular plate 3 has a fitting groove 33 with the same shape as the clamping surface of the claw 12, and the first limiting part 4 magnetically fixes the circular plate 3, as... Figure 5 As shown, the advantage of this design is that when the chuck is not in use, the circular plate 3 can fit between the surface of the jaw 12 and the disc body 1, which can shield the moving groove 11 and reduce the accumulation of dust on the inner wall of the moving groove 11. If too much dust accumulates, it may affect the normal working mode of the jaw 12, thereby reducing the stability of the jaw 12 in clamping the workpiece.

[0026] When the circular plate 3 is pulled and disengaged from the first magnetically attracted limiting part 4, the circular plate 3 can move along the surface of the extension rod 2 until it contacts the second limiting part 5. At this time, the circular plate 3 is fixedly attached to the surface of the jaw 12 under the magnetic attraction of the second limiting part 5. When the jaw 12 performs a clamping operation on the workpiece, it can slide smoothly along the surface of the circular plate 3. It can be seen that designing the circular plate 3 and the extension rod 2 as a sliding connection will not interfere with the jaw 12 clamping the workpiece, and can also provide auxiliary support when the jaw 12 clamps the workpiece. In addition, after the circular plate 3 is magnetically fixed by the first limiting part 4, in order to facilitate the operator to pull the circular plate 3, multiple circumferentially distributed pulling holes 34 are opened on the outer contour surface of the circular plate 3.

[0027] Example 3: Refer to Figure 3 and Figure 4 A machine tool chuck positioning device, based on the above-mentioned embodiment two, differs in that, when the second limiting part 5 and the extension rod 2 are detachably connected, the second limiting part 5 is sleeved on the surface of the extension rod 2, and a hexagonal rotating block 51 is fixedly connected to the surface of the second limiting part 5. A lead screw 52 is fixedly connected to the surface of the rotating block 51. The end of the extension rod 2 that is in contact with the rotating block 51 is provided with a threaded groove 21 that cooperates with the lead screw 52. With this design, when the rotating block 51, which is in a hexagonal structure, is rotated, it will drive the lead screw 52 to rotate and disengage from the threaded groove 21. At this time, the circular plate 3 can slide along the surface of the extension rod 2 and be removed. In this way, a circular plate 3 that is compatible with it can be replaced according to the support requirements of tubular workpieces of different sizes.

[0028] It should be noted that the several embodiments shown above in this application are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. It should also be noted that in the textual description of this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply such an actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements may include not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus; and, without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0029] Furthermore, those skilled in the art can implement or use this application by practicing the several embodiments shown above. Various modifications to the embodiments shown above will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments not shown without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the several embodiments shown above, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A machine tool chuck positioning device, comprising: A disc body (1) has multiple circumferentially distributed movable grooves (11) on its surface, and each movable groove (11) is connected to the central hole of the disc body (1). A claw (12) is slidably connected to the inner wall of each movable groove (11). The disc body is characterized by further comprising: Multiple extension rods (2) are circumferentially connected to the disc body (1), and each extension rod (2) is located between two adjacent claws (12). A circular plate (3) is connected between the surfaces of the multiple extension rods (2), and a positioning hole (31) of the same size as the central hole of the disc body (1) is provided at the center of the surface of the circular plate (3). When the claw (12) slides along the inner wall of the moving groove (11) toward the center hole of the disc (1), the claw (12) slides along one side of the circular plate (3).

2. The machine tool chuck positioning device according to claim 1, characterized in that, When the surfaces of the circular plate (3) and the extension rod (2) are slidably connected, the surface of the circular plate (3) is provided with a moving hole (32) that fits against the surface of the extension rod (2), the surface of the disc (1) is provided with a mounting groove (13) corresponding to each extension rod (2), one end of the extension rod (2) is fixedly connected to the inner wall of the mounting groove (13), the inner wall of the mounting groove (13) is fixedly connected with a first limiting part (4) sleeved on the surface of the extension rod (2), and the other end of the extension rod (2) is connected with a second limiting part (5).

3. The machine tool chuck positioning device according to claim 2, characterized in that, When the circular plate (3) moves away from the second limiting part (5) along the surface of the extension rod (2) and fits against the surface of the disc body (1), the surface of the circular plate (3) is provided with a fitting groove (33) with the same shape as the clamping surface of the claw (12), and the first limiting part (4) fixes the circular plate (3).

4. The machine tool chuck positioning device according to claim 2, characterized in that, When the circular plate (3) moves along the surface of the extension rod (2) away from the first limiting part (4) and is fixed with the second limiting part (5), the outer contour surface of the circular plate (3) is provided with a plurality of circumferentially distributed pull holes (34).

5. The machine tool chuck positioning device according to claim 2, characterized in that, When both the first limiting part (4) and the second limiting part (5) adopt a magnetic structure, the circular plate (3) is made of iron.

6. The machine tool chuck positioning device according to claim 2, characterized in that, When the second limiting part (5) and the extension rod (2) are detached, the second limiting part (5) is sleeved on the surface of the extension rod (2), and a rotating block (51) is fixedly connected to the surface of the second limiting part (5). A lead screw (52) is fixedly connected to the surface of the rotating block (51), and a threaded groove (21) that mates with the lead screw (52) is opened at the end of the extension rod (2) that is in contact with the rotating block (51).

7. The machine tool chuck positioning device according to claim 6, characterized in that, The rotating block (51) has a hexagonal structure.

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