Telescoping chuck

Abstract

This utility model discloses a telescopic chuck, relating to the field of machine tool fixture technology. The telescopic chuck includes a chuck base, a chuck body, and multiple sets of annularly distributed telescopic jaws. The chuck body is fixed to the outside of the chuck base via connecting screws. The telescopic jaws consist of telescopic arms and jaw components, which are detachably connected to the telescopic arms via connecting bolts. A shaft and a sleeved piston are located inside the chuck body. The piston is connected to the telescopic arms via a connecting rod. A drive rod inside the machine tool spindle drives the piston to slide, controlling the extension and retraction of the telescopic arms. This, combined with an end-face drive structure, achieves the switching between clamping, releasing, and driving. This utility model allows for the completion of all machining processes for shaft-type parts without secondary clamping, significantly saving time and improving machining coaxiality. It is compatible with traditional lathes and CNC centers, exhibiting strong adaptability.

Description

Technical Field

[0001] This utility model relates to the field of machine tool fixture technology, specifically to a telescopic chuck. Background Technology

[0002] In the machining of shaft parts, existing technologies generally require multiple clamping operations: the workpiece machining needs to be carried out in two steps: clamping at the chuck end and positioning at the center end. This not only leads to material waste and increased machining time, but also causes positioning deviations due to excessive clamping, affecting the dimensional consistency and coaxiality of the parts.

[0003] Specifically, the jaws of traditional ordinary chucks do not have telescopic functionality and can only machine the outer diameter outside the clamping area. If the entire outer diameter of the workpiece needs to be turned, a second clamping is required. During the second clamping process, the positioning datum of the workpiece is prone to shift, making it difficult to ensure the concentricity of all outer diameters. At the same time, multiple clamping operations significantly extend the machining cycle and reduce production efficiency, especially in the machining of long shaft parts, where these problems are more prominent.

[0004] Traditional chucks require secondary assembly for turning the entire outer diameter of a workpiece, which can easily cause the positioning reference to shift, making it difficult to ensure the concentricity of all outer diameters. This also significantly extends the machining cycle and reduces production efficiency. Utility Model Content

[0005] The purpose of this invention is to provide a telescopic chuck to solve the problems of increased working time and loss of accuracy caused by multiple clamping in the machining of existing shaft parts as mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A telescopic chuck includes a chuck base, a chuck body, and telescopic claws. The chuck body is sleeved on the outside of the chuck base, and the telescopic claws are inserted into the inside of the chuck body. Multiple sets of telescopic claws are provided and are evenly distributed in a ring on the inside of the chuck body. Each telescopic claw includes a telescopic arm and a claw component. The telescopic arm is inserted into the inside of the chuck body, and a connecting bolt is inserted into the inner side of the claw component. The connecting bolt passes through the claw component and is threaded to one end of the telescopic arm. The telescopic arm performs telescopic movements within the chuck body, thereby driving the claw component to perform clamping and releasing movements.

[0007] Preferably, a connecting screw is inserted into the chuck seat, the connecting screw is threaded to the chuck seat, and multiple sets of the connecting screw are provided and evenly distributed in a ring on the chuck seat.

[0008] Preferably, the connecting screw is inserted into the inside of the disc body to fix the disc body to the chuck seat.

[0009] Preferably, a shaft is fixedly connected to the inner side of the disc body, and the shaft shares a central axis with the disc body; a piston is sleeved on the outer side of the shaft; an end face drive structure is connected to the outer side of the disc body, and a workpiece abuts against the outer side of the end face drive structure.

[0010] Preferably, the piston passes through the disc body and is movably inserted into the inner side of the chuck seat. The inner side of the chuck seat is engaged with the machine tool spindle. A drive rod is inserted into the inner side of the machine tool spindle. The drive rod is inserted into the inner side of the piston. The drive rod is used to drive the piston to slide along the axis of the shaft.

[0011] Preferably, the piston is provided with a plug rod, which is inserted into the inner side of the other end of the telescopic arm.

[0012] The technical effects and advantages of this utility model are as follows: 1. This telescopic chuck, through the linkage between the telescopic jaws and the end face drive structure, enables shaft parts to complete all processes in one clamping, eliminating the need for secondary repositioning and clamping, thus significantly saving processing time; 2. This telescopic chuck uses a connecting screw to ensure the stable coaxiality of the chuck body and the chuck seat, and a drive rod to precisely transmit power to the piston. Combined with the motion guide of the shaft, it reduces the motion deviation of the telescopic jaws. Combined with the stable rotation of the end face drive structure, it eliminates the accuracy error of multiple clamping operations. 3. The telescopic chuck's claws are detachably connected to the telescopic arm via connecting bolts, allowing for quick replacement to adapt to shaft parts of different specifications; it is also compatible with traditional lathes and CNC centers, eliminating the need for significant modifications to existing equipment and reducing equipment adaptation costs. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the retracted gripper arm structure of this utility model; Figure 3 This is a schematic diagram of the clamping arm structure of this utility model in the clamping state.

[0015] In the diagram: 1. Chuck seat; 11. Connecting screw; 2. Chuck body; 21. Shaft; 22. Piston; 221. Insert rod; 23. End face drive structure; 3. Telescopic jaw; 31. Telescopic arm; 32. Jaw; 4. Machine tool spindle; 5. Drive rod; 6. Workpiece. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] This utility model discloses a telescopic chuck, according to the attached... Figure 1 As shown, it includes a chuck base 1, a chuck body 2, and a telescopic chuck claw 3.

[0018] According to the appendix Figures 2-3 As shown, the disc body 2 is further fitted onto the outside of the chuck seat 1 and fixed by multiple sets of evenly distributed annular connecting screws 11; the connecting screws 11 are threadedly connected to the chuck seat 1 and inserted into the inside of the disc body 2 to ensure that the disc body 2 and the chuck seat 1 are coaxial, thereby improving the overall structural rigidity.

[0019] According to the appendix Figures 2-3 As shown, furthermore, multiple sets of telescopic claws 3 are provided, evenly distributed in a ring on the inner side of the disc body 2, including telescopic arms 31 and claws 32; the telescopic arms 31 are inserted into the inner side of the disc body 2 and can move in a radial direction along the disc body 2; a connecting bolt is inserted into the inner side of the claw 32, which passes through the claw 32 and is threaded to one end of the telescopic arm 31, which facilitates the disassembly and replacement of the claw 32 and adapts to shaft parts of different specifications.

[0020] According to the appendix Figures 2-3 As shown, a shaft 21 is fixedly connected to the inner side of the disc body 2. The shaft 21 shares a central axis with the disc body 2, and a piston 22 is sleeved on its outer side. The piston 22 passes through the disc body 2 and is movably inserted into the inner side of the chuck seat 1. A rod 221 is provided on the piston 22. The rod 221 is inserted into the inner side of the other end of the telescopic arm 31, forming a linkage structure of piston, rod and telescopic arm.

[0021] According to the appendix Figures 1-3 As shown, the chuck seat 1 is specifically disclosed to have a machine tool spindle 4 attached to its inner side, and a drive rod 5 is inserted into the inner side of the machine tool spindle 4. The drive rod 5 is inserted into the inner side of the piston 22 and can drive the piston 22 to slide along the axial direction of the shaft 21. An end face drive structure 23 is connected to the outer side of the disc body 2. The outer side of the end face drive structure 23 can abut against the workpiece 6 and is used to drive the workpiece 6 to rotate when the telescopic jaw 3 is released.

[0022] Working principle: The drive rod 5 drives the piston 22 to slide along the shaft 21. The piston 22 pushes or pulls the telescopic arm 31 to extend and retract within the disc 2 through the insertion rod 221, thereby driving the claw 32 to clamp or release the workpiece 6. When the claw 32 is released, the end face drive structure 23 abuts against the end face of the workpiece 6, and can be switched to the end face drive rotation mode to realize the processing of different parts of the workpiece.

[0023] It should be noted that, in this document, 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 any such 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 includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. 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.

[0024] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A telescopic chuck comprising a chuck base (1), a chuck body (2) and telescopic chuck jaws (3), characterized in that, The disc body (2) is sleeved on the outside of the chuck seat (1), and the telescopic claw (3) is inserted into the inside of the disc body (2). The telescopic claw (3) is provided in multiple sets and is evenly distributed in a ring on the inside of the disc body (2). The telescopic claw (3) includes a telescopic arm (31) and a claw (32). The telescopic arm (31) is inserted into the inside of the disc body (2), and a connecting bolt is inserted into the inside of the claw (32). The connecting bolt passes through the claw (32) and is threaded to one end of the telescopic arm (31). The telescopic arm (31) moves in and out of the disc (2), thereby driving the claw (32) to perform clamping and releasing movements.

2. The telescoping chuck of claim 1, wherein, A connecting screw (11) is inserted into the chuck seat (1). The connecting screw (11) is threadedly connected to the chuck seat (1). There are multiple sets of connecting screws (11), which are evenly distributed in a ring on the chuck seat (1).

3. The telescoping chuck of claim 2, wherein, The connecting screw (11) is inserted into the inside of the disc body (2) to fix the disc body (2) to the chuck seat (1).

4. The telescoping chuck of claim 3, wherein, A shaft (21) is fixedly connected to the inner side of the disc (2), and the shaft (21) and the disc (2) share the same central axis; a piston (22) is sleeved on the outer side of the shaft (21); an end face drive structure (23) is connected to the outer side of the disc (2), and a workpiece (6) abuts against the outer side of the end face drive structure (23).

5. The telescoping chuck of claim 4, wherein, The piston (22) passes through the disc body (2) and is movably inserted into the inside of the chuck seat (1). The machine tool spindle (4) is clamped inside the chuck seat (1). A drive rod (5) is inserted into the inside of the machine tool spindle (4). The drive rod (5) is inserted into the inside of the piston (22). The drive rod (5) is used to drive the piston (22) to slide along the axis of the shaft (21).

6. The telescoping chuck of claim 5, wherein, The piston (22) is provided with a plug rod (221), which is inserted into the inner side of the other end of the telescopic arm (31).

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