Adjustable multi-point self-centering precision chuck

Abstract

The utility model discloses an adjustable multi -point self -centering precision chuck belongs to machining equipment technical field, is aimed at the problem that driving process can not guarantee clamping stability and can not keep stable synchronous clamping operation of each clamping jaw, including bottom plate, mounting seat and support rod, the mounting seat is provided with the centering mechanism, the bottom plate top fixedly connected with motor, and the motor upper end fixedly connected with the pivot, and the pivot is rotatoryly arranged on the mounting seat and is connected with the centering mechanism, the utility model discloses the centering mechanism that sets up, cooperation motor's drive operation makes workpiece when carrying out centering clamping on the mounting seat upper portion, can stably on its upper portion clamping, and further guarantees the centering effect and the stability of processing, through the centering mechanism that sets up, makes each locating piece can keep synchronous centering positioning work, improves the synchronism of workpiece centering process, ensures that workpiece can be accurately centered operation, thereby improves the practicality of device.

Description

Technical Field

[0001] This utility model belongs to the technical field of mechanical processing equipment, specifically relating to an adjustable multi-point self-centering precision chuck. Background Technology

[0002] Existing self-centering chucks typically include two types: self-centering three-jaw chucks and self-centering four-jaw chucks. The jaws of both types of self-centering chucks are set on a complete disc and can move equidistantly relative to the center of the chuck.

[0003] A prior art patent, CN222588146U, describes a rotary self-centering chuck. This patent includes a fixed disk, a rotating disk, jaws, and a rotary drive mechanism. The jaws are multiple in number and include connecting rods and contact elements. One end of the connecting rod is hinged to the fixed disk, and the other end is connected to the contact element. The rotating disk is rotatably mounted on the fixed disk, and its side has a jaw movement groove. The connecting rod passes through the jaw movement groove, and its middle part is slidably hinged to the wall of the jaw movement groove. The rotary drive mechanism controls the rotating disk to rotate along the center of the rotating disk on the fixed disk. This invention improves the structure of the traditional self-centering chuck, increasing its centering accuracy and making it suitable for different numbers of jaws. The device structure is not complex, and the processing and maintenance costs are low. However, in practical use, it still has the following shortcomings: From a practical standpoint, this patent uses cylinder drive control, which often makes it difficult to guarantee the stability of the workpiece centering and clamping, thus affecting the chuck's centering effect on the workpiece and hindering its use. Furthermore, the jaws cannot maintain stable synchronous clamping operations, further reducing centering efficiency.

[0004] Therefore, an adjustable multi-point self-centering precision chuck is needed to solve the problems in the existing technology where the driving process cannot guarantee clamping stability and cannot maintain stable synchronous clamping operation of each jaw. Utility Model Content

[0005] The purpose of this invention is to provide an adjustable multi-point self-centering precision chuck to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an adjustable multi-point self-centering precision chuck, comprising a base plate, a mounting base, and a support rod. The mounting base is fixedly mounted on the upper part of the base plate via the support rod. A centering mechanism is provided on the mounting base. A motor is fixedly connected to the top of the base plate. A rotating shaft is fixedly connected to the upper end of the motor. The rotating shaft is rotatably mounted on the mounting base and connected to the centering mechanism.

[0007] It should be noted in the solution that the mounting base is configured as a box.

[0008] It is further worth noting that the centering mechanism includes a limiting groove, which is provided through the upper part of the mounting base. A movable rod is slidably arranged in the limiting groove. A positioning block is fixedly connected to the upper end of the movable rod. A rotating disk is provided at the lower end of the movable rod. The rotating disk is connected to a rotating shaft. An arc-shaped groove is opened on the rotating disk corresponding to the movable rod. A hinge seat is fixedly connected to the movable rod. A hinge rod is rotatably connected to the hinge seat. A connecting sleeve is rotatably connected to the hinge seat through the hinge rod. A guide rod is slidably arranged in the connecting sleeve. A limiting plate is fixedly connected to one end of the guide rod. A fixing sleeve is fixedly connected to the other end of the guide rod. A rotating rod is rotatably arranged in the fixing sleeve. The rotating rod is fixedly connected in the mounting base. A torsion spring is sleeved on the outside of the fixing sleeve. The two ends of the torsion spring are respectively connected to the rotating rod and the fixing sleeve.

[0009] Furthermore, it should be noted that four limiting grooves are provided on the upper part of the mounting base, and the four limiting grooves are evenly distributed on the mounting base through the central axis of the mounting base.

[0010] In a preferred embodiment, the positioning block is limited to slide on the upper part of the mounting base via a limiting groove.

[0011] In a preferred embodiment, one end of the arc-shaped groove is located near the outer periphery of the rotating disk, and the other end is located near the center of the rotating disk.

[0012] In a preferred embodiment, four arc-shaped grooves are provided on the rotating disk, and the four arc-shaped grooves are evenly distributed in a rotating manner on the upper part of the rotating disk through the center of the rotating disk.

[0013] In a preferred embodiment, the rotating rod is disposed inside the mounting base and outside the rotating disk.

[0014] Compared with the prior art, the adjustable multi-point self-centering precision chuck provided by this utility model has at least the following beneficial effects:

[0015] (1) By setting a centering mechanism and cooperating with the drive of the motor, the workpiece can be stably clamped on the upper part of the mounting base when it is centered and clamped, thereby ensuring the centering effect and the stability of the processing.

[0016] (2) By setting a centering mechanism, each positioning block can maintain synchronous centering and positioning work, improve the synchronicity of the workpiece centering process, ensure that the workpiece can be accurately centered, thereby improving the practicality of the device. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2This is a schematic diagram of the internal cross-sectional structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the disassembled structure of this utility model;

[0020] Figure 4 This is a schematic diagram of a partially disassembled structure of the present invention.

[0021] In the diagram: 1. Base plate; 2. Mounting seat; 3. Support rod; 4. Centering mechanism; 401. Limiting groove; 402. Movable rod; 403. Positioning block; 404. Hinge seat; 405. Hinge rod; 406. Connecting sleeve; 407. Guide rod; 408. Rotating disk; 409. Arc groove; 4010. Limiting plate; 4011. Fixed sleeve; 4012. Rotating rod; 4013. Torsion spring; 5. Motor; 6. Rotating shaft. Detailed Implementation

[0022] The present invention will be further described below with reference to the embodiments.

[0023] Please see Figure 1-4 This utility model provides an adjustable multi-point self-centering precision chuck, including a base plate 1, a mounting base 2 and a support rod 3. The mounting base 2 is fixedly mounted on the upper part of the base plate 1 through the support rod 3. A centering mechanism 4 is provided on the mounting base 2. A motor 5 is fixedly connected to the top of the base plate 1. A rotating shaft 6 is fixedly connected to the upper end of the motor 5. The rotating shaft 6 is rotatably mounted on the mounting base 2 and connected to the centering mechanism 4. The mounting base 2 is box-shaped.

[0024] Specifically, a control unit (such as a PLC or relay circuit) electrically connected to the motor 5 is set in the base plate 1 or an external control box. This unit includes a start / stop switch, a forward / reverse control module, and a speed controller (optional). The motor 5 is preferably a servo motor or a stepper motor, which drives the rotating shaft 6 to rotate precisely by a specific angle by receiving control signals.

[0025] Further as Figure 2 , Figure 3 and Figure 4As shown, it is worth noting that the centering mechanism 4 includes a limiting groove 401, which is provided through the upper part of the mounting base 2. A movable rod 402 is slidably disposed in the limiting groove 401. Four limiting grooves 401 are provided on the upper part of the mounting base 2, and the four limiting grooves 401 are evenly distributed on the mounting base 2 through the central axis of the mounting base 2. A positioning block 403 is fixedly connected to the upper end of the movable rod 402, and the positioning block 403 is limited by the limiting groove 401 on the upper part of the mounting base 2. A sliding movable rod 402 has a rotating disk 408 at its lower end. The rotating disk 408 is connected to the rotating shaft 6. The top end of the rotating shaft 6 is fixedly connected to the center hole of the rotating disk 408 via a keyway or spline. The bottom of the rotating disk 408 is supported on the inner wall of the mounting base 2 by a bearing (not shown), ensuring that the rotating disk 408 rotates only around the axis of the rotating shaft 6. An arc-shaped groove 409 is provided on the rotating disk 408 corresponding to the movable rod 402. One end of the arc-shaped groove 409 is located near the outer periphery of the rotating disk 408. One end is positioned near the center of the rotating disk 408. Four arc-shaped grooves 409 are formed on the rotating disk 408, and the four arc-shaped grooves 409 are evenly distributed in a rotating manner around the center of the rotating disk 408. A hinge seat 404 is fixedly connected to the movable rod 402, and a hinge rod 405 is rotatably connected to the hinge seat 404. A connecting sleeve 406 is rotatably connected to the hinge seat 404 through the hinge rod 405. A guide rod 407 is slidably arranged inside the connecting sleeve 406. One end of the guide rod 407 is fixedly connected to the limiting plate 4010, and the other end of the guide rod 407 is fixedly connected to the fixing sleeve 4011. A rotating rod 4012 is rotatably arranged inside the fixing sleeve 4011. The rotating rod 4012 is fixedly connected inside the mounting base 2. A torsion spring 4013 is sleeved on the outside of the fixing sleeve 4011. The two ends of the torsion spring 4013 are respectively connected to the rotating rod 4012 and the fixing sleeve 4011. The rotating rod 4012 is arranged inside the mounting base 2 and outside the rotating disk 408.

[0026] In use, the motor 5 operates, causing the rotating disk 408 to rotate within the mounting base 2 via the rotating shaft 6. The rotation of the rotating disk 408 causes the bottom end of the movable rod 402 to slide within the arc-shaped groove 409, and the movable rod 402 is limited to sliding within the limiting groove 401. This causes the movable rod 402 to synchronously move the positioning block 403 closer, thus enabling centering and positioning of the workpiece. Furthermore, the rotational connection between the hinge seat 404 and the connecting sleeve 406, along with the sliding of the connecting sleeve 406 on the guide rod 407, ensures stable sliding of the movable rod 402 within the mounting base 2, further improving the stability of the positioning block 403 in clamping and positioning the workpiece.

[0027] Specifically, a slider or roller (not shown) is fixed at the bottom of the movable rod 402. The slider is embedded in the arc groove 409 of the rotating disk 408 and slides with it. The radius of curvature of the arc groove 409 decreases from the outer periphery to the center, so that the movable rod 402 moves radially along the limiting groove 401 when the rotating disk 408 rotates. The torsion spring 4013 is in a pre-compressed state in the initial state (when the workpiece is not clamped). Its pre-tension ensures that the guide rod 407 drives the fixed sleeve 4011 to stick tightly to the rotating rod 4012. When the motor 5 reverses, the torsion spring 4013 releases the torque and drives the positioning block 403 to return to its original position synchronously.

[0028] Additionally, the workpiece contact surface of the positioning block 403 is provided with a replaceable hard alloy liner (such as tungsten carbide). The surface of the liner is machined into a V-groove or a flat surface to accommodate cylindrical or square workpieces. The positioning block 403 and the movable rod 402 are connected by an adjustable thread to achieve fine adjustment of the clamping height.

[0029] As can be seen from the above working process, the centering mechanism 4, in conjunction with the driving operation of the motor 5, enables the workpiece to be stably clamped on the upper part of the mounting base 2 when it is being centered and clamped, thereby ensuring the centering effect and the stability of the processing.

[0030] This solution has the following working process: When this device is in use, the motor 5 runs, causing the rotating disk 408 to rotate within the mounting base 2 via the rotating shaft 6. Under the rotation of the rotating disk 408, the bottom end of the movable rod 402 slides within the arc-shaped groove 409, and the movable rod 402 slides within the limiting groove 401, causing the movable rod 402 to synchronously move the positioning block 403 closer. This enables the workpiece to be centered and positioned. Furthermore, the rotating connection between the hinge seat 404 and the connecting sleeve 406, along with the sliding of the connecting sleeve 406 on the guide rod 407, ensures stable sliding of the movable rod 402 within the mounting base 2, further improving the stability of the positioning block 403 in clamping and positioning the workpiece. The torsion spring 4013 allows the guide rod 407 to easily reset after rotation on the rotating rod 4012, facilitating the reset of the positioning block 403 via the rotation of the motor 5, thus improving the ease of use of the device.

[0031] In summary: the centering mechanism 4, in conjunction with the drive of the motor 5, ensures that the workpiece is stably clamped on the upper part of the mounting base 2 during centering and clamping, thereby guaranteeing the centering effect and processing stability. The centering mechanism 4 also enables each positioning block 403 to maintain synchronous centering and positioning, improving the synchronicity of the workpiece centering process and ensuring that the workpiece can be accurately centered, thus enhancing the practicality of the device.

Claims

1. An adjustable multi-point self-centering precision chuck, comprising a base plate (1), a mounting seat (2) and a supporting rod (3), the mounting seat (2) being fixedly installed on the upper portion of the base plate (1) through the supporting rod (3), characterized in that: A centering mechanism (4) is provided on the mounting base (2), a motor (5) is fixedly connected to the top of the base plate (1), a rotating shaft (6) is fixedly connected to the upper end of the motor (5), and the rotating shaft (6) is rotatably set on the mounting base (2) and connected to the centering mechanism (4); The centering mechanism (4) includes a limiting groove (401), which is provided through the upper part of the mounting base (2). A movable rod (402) is slidably arranged in the limiting groove (401). A positioning block (403) is fixedly connected to the upper end of the movable rod (402). A rotating disk (408) is provided at the lower end of the movable rod (402). The rotating disk (408) is connected to the rotating shaft (6). An arc-shaped groove (409) is opened on the rotating disk (408) corresponding to the movable rod (402). A hinge seat (404) is fixedly connected to the movable rod (402). A hinge rod (405) is rotatably connected to the hinge seat (404). A connecting sleeve (406) is rotatably connected to the hinge seat (404) through the hinge rod (405). A guide rod (407) is slidably arranged inside the connecting sleeve (406). One end of the guide rod (407) is fixedly connected to a limiting plate (4010), and the other end of the guide rod (407) is fixedly connected to a fixing sleeve (4011). A rotating rod (4012) is rotatably arranged inside the fixing sleeve (4011). The rotating rod (4012) is fixedly connected inside the mounting base (2). A torsion spring (4013) is sleeved on the outside of the fixing sleeve (4011). The two ends of the torsion spring (4013) are respectively connected to the rotating rod (4012) and the fixing sleeve (4011). Four limiting grooves (401) are opened on the upper part of the mounting base (2). The four limiting grooves (401) are evenly distributed on the mounting base (2) through the central axis of the mounting base (2).

2. The adjustable multi-point self-centering precision chuck of claim 1, wherein: The mounting base (2) is set in the form of a box.

3. The adjustable multi-point self-centering precision chuck of claim 2, wherein: The positioning block (403) slides on the upper part of the mounting base (2) through the limiting groove (401).

4. The adjustable multi-point self-centering precision chuck of claim 3, wherein: The arc-shaped groove (409) is located near the outer periphery of the rotating disk (408) at one end and near the center of the rotating disk (408) at the other end.

5. The adjustable multi-point self-centering precision chuck of claim 4, wherein: Four arc-shaped grooves (409) are provided on the rotating disk (408), and the four arc-shaped grooves (409) are evenly distributed in a rotating manner on the upper part of the rotating disk (408) through the center of the rotating disk (408).

6. The adjustable multi-point self-centering precision chuck of claim 5, wherein: The rotating rod (4012) is located inside the mounting base (2) and outside the rotating disk (408).

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