Cutter base

Abstract

The utility model discloses a tool base, and belongs to the technical field of numerical control machine tool tool installation, the tool base comprises a tool base body, an ER chuck and a chuck nut, and the position, close to the lower end, of the outer surface of the tool base body is fixedly sleeved with a fixing ring; according to the tool base, the tool is installed on the tool base body through cooperation of the tool base body, the ER chuck and the chuck nut, the position of the movable ring is adjusted through cooperation of the fixed ring, the compression spring and the movable ring, and therefore the position of the anti-loosening unit is adjusted so that the anti-loosening unit can be attached to the bottom of the chuck nut; the chuck nut and the anti-loosening unit are combined together through cooperation between the limiting groove and the limiting block, the rotation direction of the chuck nut and the rotation direction of the anti-loosening unit are opposite through cooperation between the external threads, the guiding unit and the ratchet wheel groove, and in other words, under vibration or impact loads, the chuck nut and the anti-loosening unit can be mutually restricted, and the anti-loosening effect is achieved. Therefore, loosening of the chuck nut is avoided, and it is ensured that the ER chuck can always clamp the tool.

Description

Technical Field

[0001] The present application relates to the technical field of tool installation for numerically controlled machine tools, and in particular to a tool holder. Background Art

[0002] A CNC lathe is a high-precision, high-efficiency automated machine tool with a wide range of machining capabilities. It can process complex workpieces such as straight and oblique cylinders, arcs, and various threads, grooves, and worms. It features linear and circular interpolation compensation functions, and has proven to be highly economical in the mass production of complex parts. Different tools are required for punching, grinding, and slotting. Each tool must be mounted on a tool holder before it can be placed on the machining equipment for processing.

[0003] The published patent document with the announcement number CN217667851U provides a tool positioning device suitable for ER chuck-type tool holders. This published patent document can position the tool axially through the cooperation of the positioning nut, the positioning screw and the ER chuck, thereby solving the problem of axial movement of the tool. It has a simple structure, is easy to adjust, and has low cost, and can meet the needs of a variety of tools. The device squeezes the ER chuck by twisting the ER chuck nut to clamp and fix the tool. After long-term use, the threads of the ER chuck nut will wear, which will cause the ER chuck nut to loosen, easily resulting in insufficient clamping force of the ER chuck to fix the tool. Utility Model Content

[0004] In response to the shortcomings of the existing technology, the present application provides a tool holder that overcomes the shortcomings of the existing technology and aims to solve the problem that the threads of the ER collet nut will wear after long-term use, causing the ER collet nut to loosen, which may easily lead to insufficient clamping force of the ER collet and inability to fix the tool.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions: a tool holder, comprising a tool holder body, an ER chuck and a chuck nut, a fixed ring fixedly sleeved on the outer surface of the tool holder body near the lower end, a compression spring fixedly connected to the upper surface of the fixed ring, a movable ring fixedly connected to the upper end of the compression spring, a ratchet groove provided on the upper surface of the movable ring, an anti-loosening unit rotatably connected to the inside of the ratchet groove, and the upper surface of the anti-loosening unit abutting against the lower surface of the chuck nut.

[0006] By adopting the above technical solution, the tool is installed on the tool holder body through the cooperation between the tool holder body, ER collet and collet nut, and the position of the movable ring is adjusted through the cooperation between the fixed ring, compression spring and movable ring, so as to adjust the position of the anti-loosening unit so that it fits the bottom of the collet nut and limits the collet nut to prevent the collet nut from loosening, ensuring that the ER collet can always clamp the tool.

[0007] As a preferred technical solution of the present application, the anti-loosening unit includes a rotating ring rotatably connected to the moving ring, the vertical cross-section of the rotating ring is T-shaped, the outer wall of the rotating ring is provided with four empty grooves evenly distributed in a circular array, the interiors of the four empty grooves are provided with guide units adapted to the ratchet grooves, and the upper surface of the rotating ring is fixedly installed with a number of limit blocks evenly distributed in a circular array.

[0008] By adopting the above technical solution, the guide unit and the ratchet groove cooperate with each other, so that the rotating ring can only rotate in the counterclockwise direction.

[0009] As a preferred technical solution of the present application, the guide unit includes a fixed rod fixedly installed in the empty groove, and a rotating block is rotatably sleeved on the outer surface of the fixed rod. The rotating block is movably connected to the rotating ring through a reset spring, and the outer wall of the rotating block away from the reset spring is in contact with the inner wall of the ratchet groove.

[0010] By adopting the above technical solution, the position of the rotating block can be adjusted by utilizing the elastic characteristics of the reset spring. When the rotating ring rotates clockwise, the rotating block will be stuck inside the ratchet groove, causing the rotating ring to be unable to rotate. That is, the rotation direction of the anti-loosening unit can be limited by the set guide unit.

[0011] As a preferred technical solution of the present application, the lower surface of the chuck nut is provided with a plurality of limiting grooves evenly distributed in a circular array, and the number of the limiting grooves is the same as that of the limiting blocks and they correspond one to one.

[0012] By adopting the above technical solution, the collet nut and the anti-loosening unit are combined together to form a whole through the cooperation between the limiting groove and the limiting block, that is, the position of the collet nut can be limited by the anti-loosening unit.

[0013] As a preferred technical solution of the present application, an external thread is provided on the outer surface of the tool holder body near the upper end, and the tool holder body is threadedly connected to the chuck nut via the external thread.

[0014] By adopting the above technical solution, external threads are provided to facilitate threaded connection between the tool seat body and the collet nut.

[0015] As a preferred technical solution of the present application, the tightening rotation direction of the collet nut is clockwise, and the rotation direction of the anti-loosening unit is counterclockwise.

[0016] By adopting the above technical solution, since the rotation directions of the collet nut and the anti-loosening unit are set in opposite directions, that is, under vibration or impact load, the collet nut and the anti-loosening unit will restrain each other, thereby preventing the collet nut from loosening.

[0017] As a preferred technical solution of the present application, a plurality of tightening grooves evenly distributed in a circular array are provided on the outer surface of the collet nut near the upper end.

[0018] By adopting the above technical solution, it is convenient to tighten the collet nut.

[0019] As a preferred technical solution of the present application, a positioning nut is provided inside the tool holder body below the ER chuck, and a positioning screw is connected to the internal thread of the positioning nut.

[0020] By adopting the above technical solution, the tool can be positioned axially through the cooperation between the positioning nut and the positioning screw, thereby solving the problem of axial movement of the tool.

[0021] Beneficial effects of this application:

[0022] In the utility model, the tool is installed on the tool seat body through the cooperation between the tool seat body, the ER chuck and the chuck nut, and the position of the movable ring is adjusted through the cooperation between the fixed ring, the compression spring and the movable ring, so that the position of the anti-loosening unit is adjusted to fit the bottom of the chuck nut, and the chuck nut and the anti-loosening unit are combined together through the cooperation between the limit groove and the limit block, and the rotation directions of the chuck nut and the anti-loosening unit are set in opposite directions through the cooperation between the external thread, the guide unit and the ratchet groove, that is, under vibration or impact load, the chuck nut and the anti-loosening unit will restrain each other, thereby avoiding loosening of the chuck nut and ensuring that the ER chuck can always clamp the tool.

[0023] With reference to the following description and drawings, specific embodiments of the present invention are disclosed in detail, indicating the manner in which the principles of the present invention may be employed. It should be understood that the scope of the embodiments of the present invention is not limited thereby. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall structure of this application;

[0025] Figure 2 This is a front cross-sectional structural diagram of the present application;

[0026] Figure 3 This is a schematic diagram of the split structure of this application;

[0027] Figure 4 A schematic diagram of the local structure of this application;

[0028] Figure 5 This is a schematic diagram of the internal structure of the ratchet groove of this application.

[0029] In the figure: 1. Tool holder body; 2. ER chuck; 3. Collet nut; 4. Positioning nut; 5. Positioning screw; 6. Fixing ring; 7. Compression spring; 8. Moving ring; 9. Anti-loosening unit; 91. Rotating ring; 92. Limit block; 93. Guide unit; 931. Fixed rod; 932. Rotating block; 933. Return spring; 10. Tightening groove; 11. Limiting groove; 12. External thread; 13. Ratchet groove. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present application in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0031] like Figure 1 - Figure 5 As shown, the present embodiment provides a tool holder, including a tool holder body 1, an ER chuck 2 and a chuck nut 3. The outer surface of the tool holder body 1 is fixedly sleeved with a fixing ring 6 near the lower end, the upper surface of the fixing ring 6 is fixedly connected with a compression spring 7, the upper end of the compression spring 7 is fixedly connected with a movable ring 8, the upper surface of the movable ring 8 is provided with a ratchet groove 13, the internal rotation of the ratchet groove 13 is connected with an anti-loosening unit 9, the upper surface of the anti-loosening unit 9 abuts against the lower surface of the chuck nut 3. When in use, the tool is installed on the tool holder body 1 by the cooperation between the tool holder body 1, the ER chuck 2 and the chuck nut 3, and the position of the movable ring 8 is adjusted by the cooperation between the fixing ring 6, the compression spring 7 and the movable ring 8, thereby adjusting the position of the anti-loosening unit 9 so that it fits against the bottom of the chuck nut 3 and limits the chuck nut 3 to prevent the chuck nut 3 from loosening, ensuring that the ER chuck 2 can always clamp the tool.

[0032] In this embodiment, if Figure 4 and 5As shown, the anti-loosening unit 9 includes a rotating ring 91 rotatably connected to the moving ring 8. The vertical cross-section of the rotating ring 91 is T-shaped. The outer wall of the rotating ring 91 is provided with four empty grooves evenly distributed in a circular array. The interiors of the four empty grooves are each provided with a guide unit 93 adapted to the ratchet groove 13. A plurality of limit blocks 92 evenly distributed in a circular array are fixedly mounted on the upper surface of the rotating ring 91. When in use, the rotating ring 91 can only rotate in the counterclockwise direction through the cooperation between the guide unit 93 and the ratchet groove 13.

[0033] In this embodiment, if Figure 4 and 5 As shown, the guide unit 93 includes a fixed rod 931 fixedly installed in the empty slot, and a rotating block 932 is rotatably sleeved on the outer surface of the fixed rod 931. The rotating block 932 is movably connected to the rotating ring 91 through a reset spring 933, and the outer wall of the rotating block 932 away from the reset spring 933 is in contact with the inner wall of the ratchet groove 13. When in use, the position of the rotating block 932 can be adjusted by utilizing the elastic characteristics of the reset spring 933. When the rotating ring 91 rotates clockwise, the rotating block 932 will be stuck in the inside of the ratchet groove 13, causing the rotating ring 91 to be unable to rotate, that is, the rotation direction of the anti-loosening unit 9 can be limited by the set guide unit 93.

[0034] In this embodiment, if Figure 3 and 4 As shown, the lower surface of the collet nut 3 is provided with a plurality of limiting grooves 11 evenly distributed in a circular array. The number of the limiting grooves 11 and the limiting blocks 92 are the same and they correspond one to one. When in use, the collet nut 3 and the anti-loosening unit 9 are combined together to form a whole through the cooperation between the limiting grooves 11 and the limiting blocks 92, that is, the position of the collet nut 3 can be limited by the anti-loosening unit 9.

[0035] In this embodiment, if Figure 3 As shown, an external thread 12 is provided on the outer surface of the tool holder body 1 near the upper end, and the tool holder body 1 is threadedly connected to the collet nut 3 through the external thread 12. When in use, the external thread 12 is provided to facilitate threading the tool holder body 1 and the collet nut 3 together.

[0036] In this embodiment, if Figure 3 and 4 As shown, the tightening rotation direction of the collet nut 3 is clockwise, and the rotation direction of the anti-loosening unit 9 is counterclockwise. When in use, since the rotation directions of the collet nut 3 and the anti-loosening unit 9 are set in opposite directions, that is, under vibration or impact loads, the collet nut 3 and the anti-loosening unit 9 will restrain each other, thereby preventing the collet nut 3 from loosening.

[0037] In this embodiment, if Figure 3 As shown, the outer surface of the collet nut 3 is provided with a plurality of tightening grooves 10 evenly distributed in a circular array near the upper end, which facilitates tightening the collet nut 3 when in use.

[0038] In this embodiment, if Figure 2 As shown, a positioning nut 4 is provided inside the tool seat body 1 below the ER chuck 2, and a positioning screw 5 is connected to the internal thread of the positioning nut 4. When in use, the tool can be positioned axially through the cooperation between the positioning nut 4 and the positioning screw 5, thereby solving the problem of axial movement of the tool.

[0039] Working principle: When using a tool holder of the present application, the tool is installed on the tool holder body 1 through the cooperation between the tool holder body 1, the ER chuck 2 and the chuck nut 3, and the position of the movable ring 8 is adjusted through the cooperation between the fixed ring 6, the compression spring 7 and the movable ring 8, so that the position of the anti-loosening unit 9 is adjusted to fit the bottom of the chuck nut 3, and the chuck nut 3 and the anti-loosening unit 9 are combined together through the cooperation between the limit groove 11 and the limit block 92, and the rotation directions of the chuck nut 3 and the anti-loosening unit 9 are set in opposite directions through the cooperation between the external thread 12, the guide unit 93 and the ratchet groove 13, that is, under vibration or impact load, the chuck nut 3 and the anti-loosening unit 9 will restrain each other, thereby preventing the chuck nut 3 from loosening and ensuring that the ER chuck 2 can always clamp the tool.

[0040] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "two ends," "one end," "the other end," and the like, indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0041] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc., should be understood in a broad sense. For example, "connected" may refer to a fixed connection, a detachable connection, or an integral connection; it may refer to a mechanical connection or an electrical connection; it may refer to a direct connection or an indirect connection through an intermediate medium; it may refer to internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0042] The present invention has been described above with reference to specific embodiments. However, those skilled in the art should understand that these descriptions are merely illustrative and are not intended to limit the scope of protection of the present invention. Those skilled in the art may make various modifications and variations to the present invention based on the spirit and principles of the present invention, and such modifications and variations are also within the scope of the present invention.

Claims

1. A tool holder, comprising a tool holder body (1), an ER chuck (2) and a chuck nut (3), characterized in that: A fixed ring (6) is fixedly sleeved on the outer surface of the tool seat body (1) near the lower end, a compression spring (7) is fixedly connected to the upper surface of the fixed ring (6), and a movable ring (8) is fixedly connected to the upper end of the compression spring (7), and a ratchet groove (13) is provided on the upper surface of the movable ring (8), and an anti-loosening unit (9) is rotatably connected inside the ratchet groove (13), and the upper surface of the anti-loosening unit (9) abuts against the lower surface of the chuck nut (3).

2. A tool holder according to claim 1, characterized in that: The anti-loosening unit (9) comprises a rotating ring (91) rotatably connected to the moving ring (8), the vertical cross-section of the rotating ring (91) being T-shaped, the outer wall of the rotating ring (91) being provided with four empty slots evenly distributed in a circular array, the interiors of the four empty slots being provided with guide units (93) adapted to the ratchet slots (13), and the upper surface of the rotating ring (91) being fixedly mounted with a plurality of limit blocks (92) evenly distributed in a circular array.

3. A tool holder according to claim 2, characterized in that: The guide unit (93) includes a fixed rod (931) fixedly installed in the empty slot, and a rotating block (932) is rotatably sleeved on the outer surface of the fixed rod (931). The rotating block (932) is movably connected to the rotating ring (91) via a return spring (933), and the outer wall of the rotating block (932) away from the return spring (933) is in contact with the inner wall of the ratchet slot (13).

4. The tool holder according to claim 2, characterized in that: The lower surface of the chuck nut (3) is provided with a plurality of limiting grooves (11) evenly distributed in a circular array, and the number of the limiting grooves (11) is the same as that of the limiting blocks (92) and they correspond one to one.

5. The tool holder according to claim 1, characterized in that: An external thread (12) is provided on the outer surface of the tool seat body (1) near the upper end, and the tool seat body (1) is threadedly connected to the chuck nut (3) via the external thread (12).

6. The tool holder according to claim 5, characterized in that: The tightening rotation direction of the collet nut (3) is clockwise, and the rotation direction of the anti-loosening unit (9) is counterclockwise.

7. The tool holder according to claim 1, characterized in that: The outer surface of the collet nut (3) is provided with a plurality of tightening grooves (10) evenly distributed in a circular array near the upper end.

8. The tool holder according to claim 1, characterized in that: A positioning nut (4) is provided inside the tool seat body (1) below the ER chuck (2), and a positioning screw (5) is connected to the internal thread of the positioning nut (4).

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