Novel cutter clamping device

Abstract

The utility model relates to the technical field of machine tool accessories, in particular to a novel cutter clamping device which comprises a chuck, the head of the chuck is sleeved with a limiting sleeve, the inner wall of the limiting sleeve is provided with an inclined face attached to the conical face of the chuck, the peripheral wall of the limiting sleeve is provided with an annular sliding groove A, and the limiting sleeve is sleeved with a nut. An annular sliding groove B matched with the annular sliding groove A is formed in the inner wall of the nut, and a plurality of balls are embedded in the annular sliding groove A and the annular sliding groove B; a mounting hole is formed in the outer wall of the nut, the other end of the mounting hole communicates with the annular sliding groove B, and a plugging piece is arranged in the mounting hole in a detachable structure mode. After the balls are mounted, the balls are prevented from leaking; one end of the cutter handle is sleeved outside the tail of the chuck, one end of the cutter handle is sleeved in the nut, and the cutter handle is meshed with the nut in a threaded structure mode.

Description

Technical Field:

[0001] This application relates to the technical field of machine tool accessories, and particularly to a new type of tool clamping device. Background Art:

[0002] The tool clamping device is a kind of machine tool accessory product, mainly used to clamp tools for milling, grinding, drilling, etc. It can be installed on lathes, milling machines, drill presses and woodworking planers, and is widely used in fields such as mechanical manufacturing and building decoration. It is simple to use and has the same operation as an ordinary tool clamping system.

[0003] Chinese Utility Model Patent with Application No. 202022797512.9 - A positioning device for installing a tool with an ER collet, including a rotor and an end mill. A tool groove is opened in the middle of one end of the rotor. The opening of the tool groove is fixedly connected to the middle of the end mill through a collet. One end of the end mill placed inside the tool groove is fixedly connected with an adjustable positioning screw. An activity hole is opened at one end of the tool groove far from the opening. One end of the activity hole is fixedly connected with an adjusting locking screw, and one end of the adjusting locking screw is threadedly connected to a threaded hole opened at one end of the adjustable positioning screw.

[0004] This patent uses a collet, that is, a chuck, to fix the end mill. The rotor and the nut are connected by threaded meshing. When the nut is screwed with the rotor, a certain friction is generated between the two inclined surfaces. Over time, the service life of the nut and the collet is reduced. Moreover, when the machine tool is working, cutting fluid and iron chips easily enter the tool holder through the gaps of the chuck, causing wear to the internal structure during disassembly, resulting in shortened equipment life and reduced accuracy, thereby affecting the processing quality of products. Utility Model Content:

[0005] To solve the above - mentioned technical problems, the present utility model provides a new type of tool clamping device. The technical problem to be solved is that when the nut is screwed with the rotor, a certain friction is generated between the two inclined surfaces, which reduces the service life of the nut and the collet over time. The technical solution adopted by the present utility model to solve the above - mentioned technical problems is:

[0006] A new type of tool clamping device, including:

[0007] A chuck, with a limit sleeve sleeved on the head of the chuck. The inner wall of the limit sleeve is provided with an inclined surface that fits the conical surface of the chuck, and an annular chute A is opened on the outer peripheral wall of the limit sleeve;

[0008] A nut, sleeved outside the limit sleeve, and an annular chute B that matches the annular chute A is opened on the inner wall of the nut;

[0009] An installation hole, one end of which is opened on the outer wall of the nut, and the other end of the installation hole communicates with the annular chute B;

[0010] A plugging member, which is arranged in the mounting hole in a detachable structure;

[0011] Ball bearings, which are embedded in the annular chute A and the annular chute B;

[0012] A tool shank, one end of which is sleeved outside the tail of the chuck, and one end of the tool shank is sleeved in the nut. The tool shank and the nut are engaged through a threaded structure.

[0013] Furthermore, the plugging member is a setscrew, and the setscrew is connected to the mounting hole through a threaded engagement method.

[0014] Furthermore, a groove is formed in the outer peripheral wall of the tool shank sleeved in the nut, and an O-ring is arranged in the groove.

[0015] Furthermore, a sealing cover is fixedly arranged on the side vertical surface of the nut away from the tool shank. The sealing cover is provided with a through hole for the tool to pass through, and the inner wall of the through hole is in clearance fit with the outer wall of the tool.

[0016] Furthermore, the material of the sealing cover is a rubber sealing material or a polymer sealing material.

[0017] Furthermore, the sealing cover includes a cover body, and a snap ring is arranged at the edge of the cover body in a fixed structure;

[0018] The nut is provided with an embedding groove for placing the snap ring.

[0019] Furthermore, the snap ring is arranged in an annular structure.

[0020] The beneficial effects of the present utility model are as follows:

[0021] A nut is rotatably arranged outside the limiting sleeve through ball bearings. When the nut is screwed, there is no friction generated by relative movement between the nut and the chuck, protecting the conical surfaces of the two components and improving the service life of the components.

[0022] By providing a cover body, cutting fluid or iron filings are prevented from entering the tool shank through the chuck, ensuring the service life of the machine tool clamping device. Description of the drawings:

[0023] Figure 1 It is a schematic cross-sectional structure diagram of the present utility model.

[0024] Figure 2 It is an exploded structure diagram of the present utility model.

[0025] In the figure:

[0026] 1, chuck; 2, limiting sleeve; 3, inclined surface; 4, annular chute A; 5, nut; 6, annular chute B; 7, plugging member; 8, ball bearing; 9, tool shank; 10, groove; 11, through hole; 12, cover body; 13, snap ring; 14, dynamic balance groove; 15, mounting groove. Specific implementation manner:

[0027] To make the purpose, technical solution and advantages of the implementation of the present utility model clearer, the present utility model will now be further described in detail with reference to the accompanying drawings and the following embodiments, so that the public can better master the implementation method of the present utility model. The specific implementation scheme of the present utility model is as follows:

[0028] A novel tool clamping device includes a chuck 1. A limit sleeve 2 is sleeved on the head of the chuck 1. An inclined surface 3 that fits with the conical surface of the chuck 1 is provided on the inner wall of the limit sleeve 2. An annular sliding groove A4 is opened on the outer peripheral wall of the limit sleeve 2. A nut 5 is sleeved outside the limit sleeve 2. An annular sliding groove B6 that matches the annular sliding groove A4 is opened on the inner wall of the nut 5. A number of balls 8 are embedded in the annular sliding groove A4 and the annular sliding groove B. The balls 8 are steel balls. An installation hole is opened on the outer wall of the nut 5, and the other end of the installation hole communicates with the annular sliding groove B6. A plugging member 7 is arranged in the installation hole in a detachable structure manner; after the balls 8 are installed, it is used to prevent the balls from leaking out. One end of a tool shank 9 is sleeved outside the tail of the chuck 1, and one end of the tool shank 9 is sleeved in the nut 5. The tool shank 9 and the nut 5 are meshed through a threaded structure.

[0029] The nut 5 is rotatably arranged outside the limit sleeve 2 through the balls 8. When the nut is screwed, there is no friction generated by the relative movement between the nut and the chuck, protecting the conical surfaces of the two parts and improving the service life of the parts.

[0030] An edge is provided on the inner wall of the limit sleeve 2 away from the inclined surface 3. An installation groove 15 is opened on the edge, which is convenient for the installation of the chuck 1. And a dynamic balance groove 14 is opened on the outer wall of the limit sleeve 2 on the side opposite to the installation groove 15, which is used to offset the influence of the installation groove 15 on the dynamic balance and improve the accuracy.

[0031] Specifically, the plugging member 7 is a set screw, and the set screw is connected with the installation hole through a threaded engagement method, which is convenient for disassembly and has a firm structure.

[0032] It should be noted that a groove 10 is opened on the outer peripheral wall of the tool shank 9 sleeved in the nut 5, and an O-ring is arranged in the groove 10, which is used to prevent cutting fluid or iron filings from entering the tool shank and affecting the use accuracy.

[0033] It should be elaborated that a sealing cover is fixedly arranged on the side elevation of the nut 5 away from the tool shank 9. A through hole 11 for the tool to pass through is opened on the sealing cover. The inner wall of the through hole 11 has a clearance fit with the outer wall of the tool, preventing cutting fluid or iron filings from entering the tool shank through the chuck 1 and ensuring the service life of the machine tool clamping device. The chuck 1 can be an ER chuck or an ERK chuck.

[0034] The material of the sealing cover is a rubber sealing material or a polymer sealing material, and the rubber sealing material can be one of nitrile rubber, chloroprene rubber, ethylene propylene rubber, silicone rubber and fluororubber.

[0035] Specifically, the sealing cover includes a cover body 12. A snap ring 13 is arranged at the edge of the cover body 12 in a fixed structure manner. The nut 5 is provided with a groove for placing the snap ring 13, facilitating quick and convenient connection. The snap ring 13 is arranged in an annular structure to prevent detachment and improve the structural stability.

[0036] The working principle and process of the present utility model are as follows:

[0037] First, place the head of the chuck 1 into the limit sleeve 2 through the mounting groove 15. At this time, the conical surface of the chuck 1 is in contact with the inclined surface 3. Then, place the limit sleeve 2 into the nut 5. At this time, the side surface of the nut 5 and the side surface of the limit sleeve 2 are coplanar. Place the balls 8 one by one into the chamber formed by the annular chute B6 and the annular chute B7 through the mounting holes until the chamber is filled. Then, rotate the plugging member 7 to close the mounting holes.

[0038] Insert one end of the tool through the through hole 11 on the cover body 12 and into the inside of the chuck 1. Then, sleeve the other end of the nut 5 on the outside of the tool shank 9. Rotate the nut 5 to be threadedly engaged with the tool shank 9. Then, push the chuck 1 inward through the limit sleeve 2. Squeeze the chuck 1 through the tool shank 9, and the chuck 1 squeezes the tool until the tool is clamped, completing the operation.

[0039] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "front", "rear", "lower left", "upper right", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is 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. Therefore, it should not be construed as a limitation on the protection scope of the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Although the present utility model is described based on a limited number of embodiments, those skilled in the art in this technical field should understand that within the scope of the present utility model described herein, other embodiments can be envisioned.

Claims

1. A new tool clamping device, characterized in that: include: A chuck (1), the head of the chuck (1) is provided with a limiting sleeve (2), the inner wall of the limiting sleeve (2) is provided with an inclined surface (3) that fits the conical surface of the chuck (1), and the outer peripheral wall of the limiting sleeve (2) is provided with an annular sliding groove A (4); A nut (5), the nut (5) is sleeved on the outside of the limiting sleeve (2), and the inner wall of the nut (5) is provided with an annular slide groove B (6) matching the annular slide groove A (4); A mounting hole, one end of which is formed on the outer wall of the nut (5), and the other end of which is connected to the annular slide groove B (6); A blocking member (7), the blocking member (7) being arranged in the mounting hole in a detachable structure; A ball (8), the ball (8) is embedded in the annular slide groove A (4) and the annular slide groove B; A knife handle (9), one end of which is sleeved outside the tail of the chuck (1), and one end of which is sleeved inside the nut (5), and the knife handle (9) and the nut (5) are meshed through a threaded structure.

2. A new tool clamping device according to claim 1, characterized in that: The blocking member (7) is a top screw, and the top screw is connected to the mounting hole by means of threaded engagement.

3. A new tool clamping device according to claim 1, characterized in that: A groove (10) is provided on the outer peripheral wall of the knife handle (9) sleeved in the nut (5), and an O-ring is arranged in the groove (10).

4. A new tool clamping device according to claim 1, characterized in that: A sealing cover is fixedly arranged on the side face of the nut (5) away from the tool handle (9), and the sealing cover is provided with a through hole (11) for the tool to pass through, and the inner wall of the through hole (11) is clearance-matched with the outer wall of the tool.

5. A new tool clamping device according to claim 4, characterized in that: The sealing cover is made of rubber sealing material or polymer sealing material.

6. A new tool clamping device according to claim 4 or 5, characterized in that: The sealing cover comprises a cover body (12), and a snap ring (13) is arranged on the edge of the cover body (12) in a fixed structure manner; The nut (5) is provided with a groove for placing the snap ring (13).

7. A new tool clamping device according to claim 6, characterized in that: The clamping ring (13) is arranged in an annular structure.

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