Chuck capable of elastically deforming

Abstract

The utility model discloses a chuck capable of elastically deforming. The chuck comprises an elastic chuck body, a connecting assembly, a positioning assembly and a clamping jaw assembly. The elastic disc body can elastically deform. One end of the connecting assembly is connected with the center of the elastic disc body, and the other end is connected with a machine tool spindle pull rod. The positioning assembly is fixedly connected with the edge of the elastic disc body, so that the edge of the elastic disc body is fixed when the center of the elastic disc body elastically deforms under the action of a machine tool spindle pull rod. The number of the clamping jaw assemblies is multiple, and the multiple clamping jaw assemblies are fixedly connected with the elastic disc body and used for clamping and releasing workpieces when the elastic disc body deforms. Compared with the prior art, movement of the clamping jaw assembly is not sliding type translation but driven by deformation of the elastic disc body, the clamping jaw assembly is fixedly connected with the elastic disc body, sliding gaps do not exist, and therefore the clamping precision cannot be affected by the sliding gaps.

Description

Technical Field

[0001] The utility model relates to the technical field of chucks, in particular to a chuck capable of elastic deformation. Background Art

[0002] The common standard chucks currently available on the market are connected to the slider by a T-block as an intermediate connector. The slider slides along the slide slot to drive the jaw to move, thereby clamping or loosening the workpiece. There is a gap between the slider and the slide slot. Although this gap can ensure the free sliding of the slider, it also affects the clamping accuracy of the jaws, resulting in low part processing accuracy. Utility Model Content

[0003] The utility model aims to provide a chuck capable of elastic deformation, so as to solve the problem that the clamping precision of the common standard chucks in the current market is low due to the influence of the moving clearance of the slider.

[0004] To achieve the above purpose, the utility model provides the following solutions:

[0005] The utility model discloses a chuck capable of elastic deformation, comprising an elastic disc body, a connecting component, a positioning component and a clamping claw component;

[0006] The elastic disk body is capable of elastic deformation; one end of the connecting assembly is connected to the center of the elastic disk body, and the other end of the connecting assembly is used to connect to the machine tool spindle pull rod; the positioning assembly is fixedly connected to the edge of the elastic disk body, so that when the center of the elastic disk body is elastically deformed under the action of the machine tool spindle pull rod, the edge of the elastic disk body is fixed; there are multiple clamping jaw assemblies, and the multiple clamping jaw assemblies are fixedly connected to the elastic disk body, and are used to clamp and release the workpiece when the elastic disk body is deformed.

[0007] Preferably, the elastic disc body includes a central disc body and an annular protrusion connected to the edge of the central disc body; the annular protrusion is fixedly connected to the positioning assembly and separates the central disc body from the positioning assembly to leave deformation space for the central disc body.

[0008] Preferably, the central disk body has an annular transition section for connecting the annular protrusion, and the thickness of the annular transition section gradually decreases and then gradually increases from the inside to the outside.

[0009] Preferably, the clamping jaw assembly comprises a clamping jaw and a T-block, a boss is formed on the elastic disc body, and the boss is provided with a T-slot for mounting the T-block; the clamping jaw and the T-block are locked by screws so that the clamping jaw and the T-block press the boss from both sides respectively.

[0010] Preferably, the clamping jaw and the boss are both provided with V-shaped grooves and cooperate with each other to fix the clamping jaw.

[0011] Preferably, a through hole is provided at the center of the elastic disc body, and one end of the connecting component is fixedly connected to the edge of the through hole.

[0012] Preferably, the connecting assembly includes a pull nut, a driving block, a back ring and a nut; the pull nut passes through the through hole and abuts against one side of the elastic disk; the driving block is threadedly connected to the pull nut and abuts against the other side of the elastic disk; the back ring and the driving block are fixedly connected by screws; the back ring and the driving block sandwich the nut in the middle; the nut is used for threaded connection with the machine tool spindle pull rod.

[0013] Preferably, the positioning assembly includes a flange and a machine tool spindle connecting flange, the flange is fixedly connected to the elastic disk body by screws, and the machine tool spindle connecting flange and the flange are used to be fixed to the machine tool spindle by screws.

[0014] Preferably, the elastic disc is made of spring steel.

[0015] Preferably, a workpiece positioning support column is provided on the elastic disc body, and the workpiece positioning support column and the clamping jaw assembly are located on the same side of the elastic disc body.

[0016] Compared with the prior art, the utility model has achieved the following technical effects:

[0017] The movement of the clamping jaw assembly in the utility model is not the sliding translation commonly used in the prior art, but a displacement driven by the deformation of the elastic disc body. During this process, the clamping jaw assembly is fixedly connected to the elastic disc body, and there is no sliding gap, so the clamping accuracy will not be affected by the sliding gap.

[0018] In the preferred embodiment of the utility model, the clamping jaws and the T-block are selected from commonly used structures in the prior art, thereby realizing the application of universal standard parts.

[0019] In a preferred embodiment of the present invention, the workpiece positioning support column can be in positioning contact with the workpiece, so that an axial positioning reference surface of the workpiece is provided through the workpiece positioning support column to better position the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 This is a schematic diagram of a front view of a chuck capable of elastic deformation according to an embodiment of the utility model;

[0022] Figure 2 for Figure 1 Schematic cross-sectional view along the AA direction;

[0023] Figure 3 A schematic diagram of another perspective of the chuck capable of elastic deformation according to an embodiment of the utility model;

[0024] In the figure: 1-elastic disc; 2-driving block; 3-pull cap; 4-back ring; 5-nut; 6-flange; 7-machine tool spindle connecting flange; 8-counterweight block; 9-T-block; 10-clamping jaw; 11-dust cover; 121-first screw; 122-second screw; 123-third screw; 124-fourth screw; 13-annular protrusion; 14-annular transition section; 15-V-groove; 16-boss; 17-workpiece positioning support column. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] Reference Figure 1 to Figure 3 This embodiment provides a chuck capable of elastic deformation, including an elastic disc body 1, a connecting component, a positioning component and a clamping claw component.

[0027] The elastic disc body 1 can be elastically deformed. One end of the connecting assembly is connected to the center of the elastic disc body 1, and the other end of the connecting assembly is used to connect to the machine tool spindle pull rod (not shown in the figure). The positioning assembly is fixedly connected to the edge of the elastic disc body 1, so that when the center of the elastic disc body 1 is elastically deformed under the action of the machine tool spindle pull rod, the edge of the elastic disc body 1 is fixed. There are multiple clamping jaw assemblies, and the multiple clamping jaw assemblies are fixedly connected to the elastic disc body 1, and are used to clamp and release the workpiece when the elastic disc body 1 is deformed.

[0028] The working principle of the chuck capable of elastic deformation in this embodiment is as follows:

[0029] Figure 2 In the embodiment, when the machine tool spindle pull rod pulls the center of the elastic disc 1 in the left direction, the center of the elastic disc 1 moves to the left, and the edge of the elastic disc 1 is fixed. Driven by the elastic disc 1, multiple clamping jaws on the right side of the elastic disc 1 approach each other, thereby clamping the workpiece.

[0030] Figure 2 In the embodiment, when the spindle pull rod of the machine tool pulls the center of the elastic disc 1 in the right direction, the center of the elastic disc 1 moves to the right, and the edge of the elastic disc 1 is fixed. Driven by the elastic disc 1, the multiple clamping jaws on the right side of the elastic disc 1 move away from each other, thereby releasing the workpiece.

[0031] Therefore, the movement of the clamping jaw assembly in this embodiment is not the sliding translation commonly used in the prior art, but a displacement driven by the deformation of the elastic disc body 1. During this process, the clamping jaw assembly is fixedly connected to the elastic disc body 1, and there is no sliding gap, so the clamping accuracy will not be affected by the sliding gap.

[0032] As a possible example, in this embodiment, the elastic disc 1 includes a central disc and an annular protrusion 13 connected to the edge of the central disc. The annular protrusion 13 is fixedly connected to the positioning assembly and separates the central disc from the positioning assembly to leave a deformation space for the central disc. Figure 2 In the embodiment, when the machine tool spindle pull rod pulls the center of the elastic disc body 1 in the left direction, the deformation space can be used for the center of the elastic disc body 1 to shift.

[0033] It is understandable that the annular protrusion 13 may also be provided by a positioning component, as long as a deformation space can be left between the elastic disc body 1 and the positioning component.

[0034] The annular protrusion 13 here can be a continuous annular shape or a discontinuous annular shape (distributed in an annular shape as a whole).

[0035] As a possible example, in this embodiment, the central disc body has an annular transition section 14 for connecting the annular protrusion 13, and the thickness of the annular transition section 14 gradually decreases and then gradually increases from the inside to the outside. By adopting the above-mentioned thickness change method, a minimum thickness area is formed on the annular transition section 14, and the minimum thickness area is more likely to undergo elastic deformation and is the main deformation part of the elastic disc body 1.

[0036] As a possible example, in this embodiment, the clamping jaw assembly includes a clamping jaw 10 and a T-block 9, a boss 16 is formed on the elastic disc 1, and the boss 16 is provided with a T-slot for mounting the T-block 9. The clamping jaw 10 and the T-block 9 are locked by a first screw 121, so that the clamping jaw 10 and the T-block 9 respectively press the boss 16 from both sides. The clamping jaw 10 and the T-block 9 here are commonly used clamping jaw assemblies in the prior art, and are also applicable to this embodiment, thereby realizing the application of universal standards.

[0037] As a possible example, in this embodiment, in order to improve the stability of the relative position between the clamping jaw 10 and the elastic disk body 1 and avoid relative sliding, V-shaped grooves 15 are provided on the clamping jaw 10 and the boss 16 and cooperate with each other to fix the clamping jaw 10.

[0038] As a possible example, in this embodiment, a through hole is provided in the center of the elastic disc 1, and one end of the connecting component is fixedly connected to the edge of the through hole. By providing a through hole in the center of the elastic disc 1, the deformation of the elastic disc 1 is facilitated, and the fixing of the connecting component is also facilitated.

[0039] As a possible example, in this embodiment, the connecting assembly includes a pull cap 3, a driving block 2, a back ring 4 and a nut 5. The pull cap 3 passes through the through hole and abuts against one side of the elastic disk body 1. The driving block 2 is threadedly connected to the pull cap 3 and abuts against the other side of the elastic disk body 1. That is, the pull cap 3 and the driving block 2 clamp the edge of the through hole from both sides respectively. The back ring 4 and the driving block 2 are fixedly connected by the second screw 122, and the back ring 4 and the driving block 2 sandwich the nut 5 in the middle, thereby fixing the nut 5. The nut 5 has an internal thread for connecting to the external thread of the machine tool spindle pull rod. However, the actual implementation is not limited to this. For example, the connecting assembly and the machine tool spindle pull rod can also be fixedly connected by screws.

[0040] As a possible example, in this embodiment, the positioning assembly includes a flange 6 and a machine tool spindle connection flange 7. The flange 6 is fixedly connected to the elastic disk body 1 by a third screw 123. The machine tool spindle connection flange 7 and the flange 6 are used to be fixed to the machine tool spindle by a fourth screw 124, and the elastic disk body 1 is provided with a through hole corresponding to the fourth screw 124. After the machine tool spindle connection flange 7 and the flange 6 are fixed, the through hole is closed by a dust cover 11.

[0041] As a possible example, in this embodiment, the elastic disc 1 is made of spring steel. According to different actual needs, those skilled in the art may also choose other materials as long as they can achieve stable clamping of the workpiece. For example, for a workpiece with a small volume and light weight, the corresponding elastic disc 1 may also be made of plastic.

[0042] As a possible example, in this embodiment, the number of the plurality of jaw assemblies is three, and they are evenly distributed along the circumferential direction with the center of the elastic disc 1 as the center. According to different actual needs, those skilled in the art may also choose other numbers and distribution methods, as long as they can clamp and release the workpiece.

[0043] As a possible example, in this embodiment, a counterweight block 8 is fixed on the elastic disc 1, and the counterweight block 8 and the clamping jaw assembly are respectively located on both sides of the elastic disc 1 and are located opposite to each other. The weight of one counterweight block 8 is roughly equal to the sum of the weights of one clamping jaw assembly and one boss 16. It should be noted that if the counterweight block 8 is not provided, when the elastic disc 1 rotates at high speed, Figure 2 The clamping jaw assembly on the right side of the elastic disc 1 moves away from the center of the elastic disc 1 under the action of centrifugal force, so that the center of the elastic disc 1 moves to Figure 2 The right side of the workpiece bulges, which will cause the clamping jaw assembly to release the workpiece. By adopting the above-mentioned weight distribution method of this embodiment, when the elastic disc body 1 rotates at a high speed, Figure 2 The counterweight block 8 on the left side of the middle elastic disc body 1 pulls the center of the elastic disc body 1 to the left under the action of centrifugal force. This pulling force offsets the rightward pulling force applied to the center of the elastic disc body 1 by the clamping jaw assembly, achieving centrifugal force compensation, thereby avoiding the workpiece falling due to the high-speed rotation of the elastic disc body 1.

[0044] As a possible example, in this embodiment, a workpiece positioning support column 17 is provided on the elastic disc body 1, and the workpiece positioning support column 17 and the clamping jaw assembly are located on the same side of the elastic disc body 1. Figure 2 When the clamping jaw assembly clamps the workpiece and pulls it to the left, the workpiece positioning support column 17 can be in positioning contact with the workpiece, thereby providing an axial positioning reference surface for the workpiece through the workpiece positioning support column 17. In practical applications, a block-shaped positioning block or an annular positioning disk can also be installed on the end surface of the positioning support column 17 according to the shape and characteristics of the workpiece.

[0045] The present invention uses specific examples to illustrate the principle and implementation of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A chuck capable of elastic deformation, characterized in that: It includes an elastic disc body, a connecting assembly, a positioning assembly and a clamping claw assembly; The elastic disk body is capable of elastic deformation; one end of the connecting assembly is connected to the center of the elastic disk body, and the other end of the connecting assembly is used to connect to the machine tool spindle pull rod; the positioning assembly is fixedly connected to the edge of the elastic disk body, so that when the center of the elastic disk body is elastically deformed under the action of the machine tool spindle pull rod, the edge of the elastic disk body is fixed; there are multiple clamping jaw assemblies, and the multiple clamping jaw assemblies are fixedly connected to the elastic disk body, and are used to clamp and release the workpiece when the elastic disk body is deformed.

2. The elastically deformable chuck according to claim 1, characterized in that: The elastic disc body includes a central disc body and an annular protrusion connected to the edge of the central disc body; the annular protrusion is fixedly connected to the positioning assembly and separates the central disc body from the positioning assembly to leave a deformation space for the central disc body.

3. The elastically deformable chuck according to claim 2, characterized in that: The central disk body has an annular transition section for connecting the annular protrusion, and the thickness of the annular transition section gradually decreases and then gradually increases from the inside to the outside.

4. The elastically deformable chuck according to claim 1, characterized in that: The clamping jaw assembly includes a clamping jaw and a T-block. A boss is formed on the elastic disc body, and the boss is provided with a T-slot for installing the T-block. The clamping jaw and the T-block are locked by screws so that the clamping jaw and the T-block press the boss from both sides respectively.

5. The elastically deformable chuck according to claim 4, characterized in that: The clamping jaw and the boss are both provided with V-shaped grooves and cooperate with each other to fix the clamping jaw.

6. The elastically deformable chuck according to claim 1, characterized in that: A through hole is arranged at the center of the elastic disc body, and one end of the connecting component is fixedly connected to the edge of the through hole.

7. The elastically deformable chuck according to claim 6, characterized in that: The connecting assembly includes a pull nut, a driving block, a back ring and a nut; the pull nut passes through the through hole and abuts against one side of the elastic disk; the driving block is threadedly connected to the pull nut and abuts against the other side of the elastic disk; the back ring and the driving block are fixedly connected by screws; the back ring and the driving block sandwich the nut in the middle; the nut is used for threaded connection with the machine tool spindle pull rod.

8. The elastically deformable chuck according to claim 1, characterized in that: The positioning assembly includes a flange and a machine tool spindle connecting flange. The flange is fixedly connected to the elastic disk body by screws. The machine tool spindle connecting flange and the flange are used to be fixed on the machine tool spindle by screws.

9. The elastically deformable chuck according to claim 1, characterized in that: The elastic disc is made of spring steel.

10. The elastically deformable chuck according to claim 1, characterized in that: The elastic disc body is provided with a workpiece positioning support column, and the workpiece positioning support column and the clamping jaw assembly are located on the same side of the elastic disc body.

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