Rotary chuck of milling cutter

Abstract

The utility model provides a rotary chuck of a milling cutter, which comprises a chuck, a spacer bush is arranged on the inner ring of the chuck, the spacer bush and the chuck are concentrically arranged, a gap is arranged between the periphery of the spacer bush and the inner ring of the chuck, a plurality of rollers are arranged on the periphery of the spacer bush along the radial direction, each roller is positioned in the gap, and a plurality of reducing structures are arranged on the inner ring of the chuck along the radial direction. A plurality of variable-diameter structures are arranged on the inner ring of the spacer bush, each roller corresponds to one variable-diameter structure, a plurality of through grooves are formed in the side wall of the spacer bush in the radial direction, each roller is located in one through groove, the rollers can move in the through grooves in the radial direction of the spacer bush by rolling on the surfaces of the variable-diameter structures, and the multiple rollers moving in the radial direction form the variable-diameter structures of the inner ring of the spacer bush. And the spacer bush with the variable-diameter structure is an opening and closing structure for connecting the periphery of the milling cutter handle to the inner ring of the chuck. The rotary chuck of the milling cutter can be quickly switched between tightening and loosening, so that the time is saved; and constant torque can be generated through the variable-diameter structure, and the clamping precision and the clamping consistency are guaranteed.

Description

Technical Field

[0001] The utility model belongs to the field of tool rotary chucks, in particular to a rotary chuck for a milling tool. Background Art

[0002] In the existing technology, the commonly used CNC tool holders are divided into two categories: strong milling chuck tool holders and spring chuck tool holders. The original workflow is two processes of loading and unloading, which are divided into manual operation and semi-automatic operation:

[0003] Manual way:

[0004] The process of loading and unloading tools is that workers put different types of tools into the tool handle chuck, then choose a wrench that matches the tool handle and rotate the wrench clockwise until they feel a certain tightness. When the tool is loaded, the tool handle is removed. The process of unloading tools is to rotate the above counterclockwise to complete the unloading of the tool.

[0005] Semi-automatic method:

[0006] The process of tool loading is as follows: workers put different types of knives into the tool holder chuck, then select a unidirectional chuck with the appropriate diameter and rotation direction, install it on the tool holder, press the tool loading button, and the drive motor drives the unidirectional chuck and tool holder to rotate clockwise. The tool loading is completed after reaching the set torque.

[0007] The process of tool unloading is as follows: remove the one-way chuck used when installing the tool, flip the one-way chuck 180 degrees, install the flipped chuck on the tool handle, press the release button, and the drive motor drives the one-way chuck and the tool handle to rotate counterclockwise to complete the tool unloading process.

[0008] The above two methods have the following disadvantages:

[0009] Manual method:

[0010] First: unsafe, with a high accident rate;

[0011] Second: The torque and force used each time are different, which seriously affects the accuracy of the product;

[0012] Third: The chuck is very easy to be damaged. The manual input torque is unidirectional, which leads to unbalanced torque, and the chuck, wrench and tool are easy to be damaged;

[0013] Semi-automatic method:

[0014] First: When switching between tightening and loosening, it cannot switch automatically, and the appropriate chuck rotation direction needs to be selected, which is cumbersome to operate;

[0015] Second: fast loading and unloading cannot be achieved. Utility Model Content

[0016] In view of this, the utility model aims to provide a rotary chuck for a milling tool to solve at least one of the above problems.

[0017] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0018] A rotary chuck for a milling tool comprises a chuck, and a spacer is arranged on the inner ring of the chuck, and the spacer is arranged concentrically with the chuck, a gap is arranged between the outer periphery of the spacer and the inner ring of the chuck, a plurality of rollers are arranged radially on the outer periphery of the spacer, each roller is located in the gap, a plurality of diameter-changing structures are arranged radially on the inner ring of the chuck, and each roller corresponds to a diameter-changing structure, a plurality of through grooves are arranged radially on the side wall of the spacer, each roller is located in a through groove, and the roller can move radially along the spacer in the through groove by rolling on the surface of the diameter-changing structure, and the plurality of rollers that move radially constitute the diameter-changing structure of the inner ring of the spacer, and the spacer of the diameter-changing structure is an opening and closing structure that connects the outer periphery of the milling tool handle to the inner ring of the chuck.

[0019] Furthermore, the variable diameter structure is an arc-shaped groove.

[0020] Furthermore, the diameter-changing structure is an arc-shaped boss.

[0021] Furthermore, the variable diameter structure is a slope.

[0022] Furthermore, the variable diameter structure is a groove with a V-shaped cross section.

[0023] Furthermore, a cover plate is respectively provided at the inner rings at both ends of the chuck, and the two ends of the spacer are respectively mounted to the inner ring of the chuck through a cover plate.

[0024] Furthermore, the roller is a cylindrical structure.

[0025] Furthermore, the roller is a spherical structure.

[0026] Furthermore, the side wall of the spacer is provided with a plurality of working units along the axial direction, and each working unit comprises a plurality of through grooves evenly distributed along the radial direction.

[0027] Furthermore, the through slots on the adjacent working units are staggered.

[0028] Compared with the prior art, the rotary chuck for a milling tool described in the utility model has the following beneficial effects: the rotary chuck is easy to operate and can be opened and closed without disassembly and flipping; it can quickly switch between tightening and loosening, saving time; a constant torque can be generated through the variable diameter structure to ensure the accuracy and consistency of clamping. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0030] Figure 1 It is a structural schematic diagram of a rotary chuck of a milling cutter according to an embodiment of the utility model;

[0031] Figure 2 It is a front view schematic diagram of a rotary chuck of a milling cutter according to an embodiment of the utility model;

[0032] Figure 3 It is a schematic diagram of the exploded structure of a rotary chuck of a milling cutter according to an embodiment of the utility model;

[0033] Figure 4 It is a cross-sectional schematic diagram of a rotary chuck of a milling cutter according to an embodiment of the utility model;

[0034] Figure 5 This is a schematic diagram of the structure of the spacer described in the embodiment of the utility model;

[0035] Figure 6 It is a schematic structural diagram of the roller described in the embodiment of the utility model.

[0036] Description of reference numerals:

[0037] 1-chuck; 11-reducing structure; 2-spacer; 21-through groove; 3-cover plate; 4-roller. DETAILED DESCRIPTION

[0038] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0039] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0040] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0041] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0042] like Figure 1-Figure 6 As shown, a rotary chuck for a milling tool comprises a chuck 1, and a spacer sleeve 2 is arranged on the inner ring of the chuck 1, and the spacer sleeve 2 is arranged concentrically with the chuck 1, a gap is arranged between the outer periphery of the spacer sleeve 2 and the inner ring of the chuck 1, a plurality of rollers 4 are arranged radially on the outer periphery of the spacer sleeve 2, and each roller 4 is located in the gap, a plurality of diameter-changing structures 11 are arranged radially on the inner ring of the chuck 1, and each roller 4 corresponds to a diameter-changing structure 11, a plurality of through grooves 21 are arranged radially on the side wall of the spacer sleeve 2, each roller 4 is located in a through groove 21, and the roller 4 passes through the through groove 21. By rolling on the surface of the reducing structure 11, it can move radially along the spacer sleeve 2 in the through groove 21. The multiple rollers 4 that move radially constitute the reducing structure 11 of the inner ring of the spacer sleeve 2. The spacer sleeve 2 of the reducing structure 11 is an opening and closing structure in which the periphery of the milling cutter handle is connected to the inner ring of the chuck 1. The rotary chuck is easy to operate and can be opened and closed without disassembly and flipping. It can quickly switch between tightening and loosening, saving time. The reducing structure 11 can generate a constant torque to ensure the accuracy and consistency of clamping.

[0043] The variable diameter structure 11 can be implemented in a variety of ways. The first embodiment of the variable diameter structure 11 is an arc-shaped boss, the second embodiment of the variable diameter structure 11 is a slope, the third embodiment of the variable diameter structure 11 is a groove with a V-shaped cross section, and the fourth embodiment of the variable diameter structure 11 is as follows: Figure 3 and Figure 4As shown in the arc groove, the roller 4 rolls in the arc groove, and the arc groove provides a path for the relative displacement of the roller 4. When each roller 4 slides to the bottom of the arc groove, the periphery of the roller 4 is located at the periphery of the spacer sleeve 2. At this time, a gap is left between the inner ring of the spacer sleeve 2 and the implementation component, and the milling cutter handle and the tool can be separated. When the chuck 1 is rotated, the roller 4 is in the through groove 21. At this time, the roller 4 rolls relative to the chuck 1, so that the roller 4 rolls along the arc groove, and the periphery of the roller 4 gradually protrudes from the through groove 21 and contacts the periphery of the milling cutter handle, so that the chuck 1, the roller 4 and the spacer sleeve 2 are clamped to the periphery of the milling cutter handle. At this time, the milling cutter handle and the tool are inseparable, and the peripheries of multiple rollers 4 act together on the periphery of the milling cutter handle and the inner ring of the chuck 1, so that the torque is stable, ensuring the clamping accuracy and clamping consistency.

[0044] A cover plate 3 is respectively provided at the inner rings of both ends of the chuck 1, and both ends of the spacer 2 are respectively installed to the inner ring of the chuck 1 through a cover plate 3. The cover plate 3 is used to facilitate maintenance by the staff, to facilitate the removal of the spacer 2, and to replace or adjust the roller 4.

[0045] There are multiple embodiments of the roller 4. The first embodiment of the roller 4 is a spherical structure. The second embodiment of the roller 4 is as follows. Figure 5 The cylindrical structure shown is sufficient to allow the periphery of the roller 4 to slide easily within the diameter-changing structure 11 .

[0046] In implementation, the side wall of the spacer 2 is provided with a plurality of working units along the axial direction, and each working unit comprises a plurality of through grooves 21 evenly distributed along the radial direction, such as Figure 1 As shown, two working units are provided in this embodiment, and in order to reduce the processing accuracy and realize the rapid switching of opening and closing, the through slots 21 on the adjacent working units are staggered.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A rotary chuck for a milling tool, characterized in that: The invention comprises a chuck (1), wherein a spacer sleeve (2) is arranged on the inner ring of the chuck (1), and the spacer sleeve (2) is arranged concentrically with the chuck (1), a gap is arranged between the outer periphery of the spacer sleeve (2) and the inner ring of the chuck (1), a plurality of rollers (4) are arranged radially on the outer periphery of the spacer sleeve (2), and each roller (4) is located in the gap, a plurality of variable diameter structures (11) are arranged radially on the inner ring of the chuck (1), and each roller (4) corresponds to a variable diameter structure (11), and the spacer sleeve (2) The side wall is provided with a plurality of through grooves (21) in the radial direction, and each roller (4) is located in a through groove (21). The roller (4) can move radially along the spacer sleeve (2) in the through groove (21) by rolling on the surface of the diameter-changing structure (11). The plurality of radially moving rollers (4) constitute the diameter-changing structure (11) of the inner ring of the spacer sleeve (2). The spacer sleeve (2) of the diameter-changing structure (11) is an opening and closing structure in which the periphery of the milling cutter handle is connected to the inner ring of the chuck (1).

2. A rotary chuck for a milling tool according to claim 1, characterized in that: The diameter-changing structure (11) is an arc-shaped groove.

3. The rotary chuck for a milling tool according to claim 1, characterized in that: The diameter-changing structure (11) is an arc-shaped boss.

4. The rotary chuck for a milling tool according to claim 1, characterized in that: The variable diameter structure (11) is a slope surface.

5. The rotary chuck for a milling tool according to claim 1, characterized in that: The diameter-changing structure (11) is a groove with a V-shaped cross section.

6. The rotary chuck for a milling tool according to claim 1, characterized in that: A cover plate (3) is respectively provided at the inner rings at both ends of the clamp head (1), and the two ends of the spacer sleeve (2) are respectively mounted to the inner ring of the clamp head (1) through a cover plate (3).

7. The rotary chuck for a milling tool according to claim 1, characterized in that: The roller (4) is a cylindrical structure.

8. The rotary chuck for a milling tool according to claim 1, characterized in that: The roller (4) is a spherical structure.

9. The rotary chuck for a milling tool according to claim 1, characterized in that: A plurality of working units are arranged on the side wall of the spacer sleeve (2) along the axial direction, and each working unit comprises a plurality of through grooves (21) evenly distributed along the radial direction.

10. A rotary chuck for a milling tool according to claim 9, characterized in that: The through slots (21) on adjacent working units are arranged in a staggered manner.

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