Heavy-load milling cutter clamp suitable for numerical control machine tool

Abstract

The invention relates to the technical field of milling cutters of milling machines, and discloses a heavy-load milling cutter clamp suitable for a numerical control machine tool. The locking nut is in threaded connection with the outer surface of the circumference of the cutter handle; the cutter handle is arranged on the outer surface of the spring chuck in a sleeving mode, and a cutter is connected to the interior of the spring chuck. The heavy-load milling cutter clamp suitable for the numerical control machine tool can effectively solve the problems that in the prior art, when a milling cutter perpendicularly installed on a machine tool spindle is disassembled, a locking nut needs to be loosened firstly, and in the process, the cutter, a spring chuck and the locking nut need to be manually held by hands to keep the cutter, the spring chuck and the locking nut relatively stable, so that the working efficiency is high. Otherwise, the spring chuck can be unfolded outwards in the nut loosening process, and the internal milling cutter can fall down under the action of gravity due to the loss of clamping force, so that the problems of blade cracking, machine tool failure and damage and the like are caused.

Description

Technical Field

[0001] The invention relates to the technical field of milling cutters for milling machines, and in particular to a heavy-duty milling cutter fixture suitable for numerically controlled machine tools. Background Art

[0002] The milling cutter fixture is a device used to install and fix the milling cutter on the milling machine. It ensures that the milling cutter maintains the correct position and stability during the processing, thereby achieving precise cutting operations. There are many types of milling cutter fixtures, and different fixtures are suitable for different types of milling cutters and processing tasks.

[0003] In the prior art, when disassembling a milling cutter vertically mounted on a machine tool spindle, the locking nut needs to be loosened first. During this process, a person needs to manually support the tool, the spring collet and the locking nut to keep them relatively stable. Otherwise, the spring collet will expand outward during the process of loosening the nut, and the internal milling cutter will fall downward under the action of gravity due to the loss of clamping force, which will cause damage such as blade cracking, tool body deformation, and machine tool failure. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the prior art, the present invention provides a heavy-duty milling cutter clamp suitable for CNC machine tools, which can effectively solve the problem in the prior art that when disassembling the milling cutter vertically installed on the machine tool spindle, the locking nut needs to be loosened first. During this process, the tool, spring collet and locking nut need to be supported by hand to keep them relatively stable. Otherwise, the spring collet will expand outward during the process of loosening the nut, and the internal milling cutter will fall downward under the action of gravity due to the loss of clamping force, causing problems such as blade cracking and machine tool failure and damage.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] The present invention provides a heavy-duty milling cutter fixture suitable for a numerically controlled machine tool, comprising:

[0007] A tool handle, the tool handle is detachably mounted to an external machine tool;

[0008] A locking nut, the locking nut being threadedly connected to the circumferential outer surface of the shank;

[0009] A spring chuck, wherein the tool handle is sleeved on the outer surface of the spring chuck, a tool is connected to the inside of the spring chuck, an annular cavity is formed on the inner wall surface of the spring chuck, and a fixing component for maintaining the relative position relationship between the spring chuck and the tool is arranged inside the annular cavity;

[0010] The fixing assembly comprises a support seat fixedly connected to the bottom of the inner wall of the annular cavity, the support seat is rotatably connected to a rotating rod through a shaft fixedly connected to the outer surface of the support seat, and one end of the rotating rod away from the support seat is fixedly connected to a curved ring block that fits the outer surface of the tool circumference;

[0011] Wherein, an anti-falling part is arranged on the circumferential outer surface of the locking nut.

[0012] Furthermore, the outer circumferential surface of the curved ring block adopts an axisymmetric structure design that fits the outer circumferential surface of the tool, and the minimum point of the radius of the outer circumferential surface of the curved ring block is located in the middle.

[0013] Furthermore, the rotating rods are provided in plurality and distributed in an annular array outside the circumference of the tool, and the curved ring block is provided with anti-slip strips embedded in a hollow groove formed on the outer surface of the circumference thereof.

[0014] Furthermore, a torsion spring connected to the inside of the rotating rod is disposed on the circumferential outer surface of the shaft rod. In an initial state, the rotating rod is in a horizontal state, and the lower surface of the rotating rod fits with the lower surface of the inner wall of the annular cavity.

[0015] Furthermore, the anti-falling part includes a connecting plate, which is fixedly connected to the circumferential outer surface of the locking nut. The knife handle is rotatably connected to the annular plate through an annular groove opened on its circumferential outer surface. The circumferential outer surface of the annular plate is fixedly connected to a connecting column. A plurality of connecting columns are provided and distributed in a circumferential array with the locking nut as the center. A slot is opened on the circumferential outer surface of the locking nut.

[0016] Furthermore, the connecting plate is slidably connected to the circumferential outer surface of the connecting column via a slide groove provided inside the connecting plate, and a notch is provided inside the connecting plate, and the inside of the notch is connected to the inside of the slide groove.

[0017] Furthermore, the notch is opened on one side of the upper part of the connecting plate, and the inner wall surface of the notch adopts an arc design.

[0018] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0019] The present invention is provided with a fixing assembly. When the tool is installed from the bottom inside the spring chuck, the tool lifts the rotating rod from the bottom to the top, driving the rotating rod to rotate and tilt upward. After the tool is installed, the rotating rod is in an inclined state. The curved ring block at its outer end is a rotating body. The points that contact the circumferential outer surface of the tool at any position in the horizontal direction are all arc-shaped. The anti-slip strip embedded on the outer surface of the curved ring block has a large friction force with the circumferential outer surface of the tool. The curved ring block is in close contact with the outer surface of the tool. Since the rotating rod directly points to the axis, after rotating and tilting, a pressure toward the axis will be generated on the tool. This pressure toward the axis will generate a large friction force between the rotating rod and the tool. The friction force is greater than the gravity on the tool, which prevents the tool from falling downward. Therefore, during the disassembly process, it is no longer necessary for the staff to hold the locking nut and pay attention to the positional relationship between the tool and the spring chuck at all times, avoiding the risk of the tool slipping from the inside of the spring chuck, ensuring the safety of use, and avoiding damage such as blade cracking, tool body deformation, and machine tool failure. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0021] Figure 1 It is a three-dimensional structural schematic diagram of an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the separation structure of the locking nut, the tool and the tool handle according to an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the structure of an anti-falling device according to an embodiment of the present invention;

[0024] Figure 4 Schematic diagram of the cross-sectional structure of a knife handle according to an embodiment of the present invention;

[0025] Figure 5 For the embodiment of the present invention Figure 4 A schematic diagram of the structure with a partial enlargement at the center;

[0026] Figure 6 For the embodiment of the present invention Figure 4 A schematic diagram of the structure with a partial enlargement at B in the middle;

[0027] Figure 7 This is a schematic diagram of the state change structure of the fixed component according to an embodiment of the present invention;

[0028] Figure 8It is a structural schematic diagram of a fixing assembly according to an embodiment of the present invention;

[0029] Fig. 9 This is a state transformation diagram of the contact position between the curved ring block and the tool in an embodiment of the present invention.

[0030] The numbers in the figure represent: 1. tool handle; 2. locking nut; 21. anti-fall part; 211. connecting plate; 2111. notch; 212. annular plate; 213. connecting column; 3. spring chuck; 31. tool; 32. annular cavity; 33. fixing assembly; 331. support seat; 332. rotating rod; 333. curved ring block; 334. anti-slip strip; 335. torsion spring. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] The present invention will be further described below in conjunction with the embodiments.

[0033] Example:

[0034] See also Figure 1-Figure 9 The present invention provides a technical solution: a heavy-duty milling cutter fixture suitable for CNC machine tools, comprising:

[0035] Tool handle 1, tool handle 1 and external machine tool can be detachably mounted;

[0036] A locking nut 2, wherein the locking nut 2 is threadedly connected to the circumferential outer surface of the shank 1;

[0037] A spring chuck 3, a tool handle 1 is sleeved on the outer surface of the spring chuck 3, a tool 31 is connected to the inside of the spring chuck 3, an annular cavity 32 is formed on the inner wall surface of the spring chuck 3, and a fixing component 33 for maintaining the relative position relationship between the spring chuck 3 and the tool 31 is arranged inside the annular cavity 32;

[0038] The fixing assembly 33 includes a support seat 331 fixedly connected to the bottom of the inner wall of the annular cavity 32, the support seat 331 is rotatably connected to a rotating rod 332 via a shaft fixedly connected to the outer surface thereof, and one end of the rotating rod 332 away from the support seat 331 is fixedly connected to a curved ring block 333 that fits the outer circumferential surface of the tool 31;

[0039] Among them, an anti-falling part 21 is arranged on the circumferential outer surface of the locking nut 2 .

[0040] The outer circumferential surface of the curved ring block 333 is designed with an axisymmetric structure that fits the outer circumferential surface of the tool 31. The minimum point of the radius of the outer circumferential surface of the curved ring block 333 is located in the middle position. The curved ring block 333 is a rotating body structure.

[0041] There are multiple rotating rods 332, which are distributed in an annular array outside the circumference of the cutter 31. The curved ring block 333 is embedded with an anti-slip strip 334 through a hollow groove opened on the outer surface of the circumference.

[0042] The circumferential outer surface of the shaft is provided with a torsion spring 335 connected to the inside of the rotating rod 332 . In the initial state, the rotating rod 332 is in a horizontal state, and the lower surface of the rotating rod 332 fits with the lower surface of the inner wall of the annular cavity 32 .

[0043] The anti-falling part 21 includes a connecting plate 211, which is fixedly connected to the circumferential outer surface of the locking nut 2. The shank 1 is rotatably connected to the annular plate 212 through an annular groove provided on its circumferential outer surface. The circumferential outer surface of the annular plate 212 is fixedly connected to a connecting column 213. A plurality of connecting columns 213 are provided and distributed in a circumferential array with the locking nut 2 as the center. A card groove is provided on the circumferential outer surface of the locking nut 2.

[0044] The connecting plate 211 is slidably connected to the outer circumferential surface of the connecting column 213 through a sliding groove provided therein, and a notch 2111 is provided inside the connecting plate 211, and the inside of the notch 2111 is connected to the inside of the sliding groove. The distance from the bottom end of the inner wall of the sliding groove to the horizontal plane where the notch 2111 is located is greater than the height of the thread groove on the outer surface of the handle 1.

[0045] The notch 2111 is provided on one side of the upper part of the connecting plate 211 , and the inner wall surface of the notch 2111 is designed with an arc. The notch 2111 is located on the side of the forward direction of the connecting plate 211 when the connecting plate 211 rotates counterclockwise, and the notch 2111 is provided on the right side surface of the connecting plate 211 .

[0046] Tool 31 installation process:

[0047] In actual application, the tool handle 1 is detachably connected to the spindle of the milling machine, and the spindle of the milling machine is perpendicular to the ground. The thread groove of the locking nut 2 is close to the top, and the wider end of the spring chuck 3 is close to the bottom, wherein the inner wall surface of the locking nut 2 is fixedly connected to the limit ring at the bottom, and the limit ring and the locking nut 2 are designed in an integrated manner. During installation, first insert the large end of the spring chuck 3 from the top of the locking nut 2, and the conical surface at the lower end of the spring chuck 3 fits with the inclined surface of the upper surface of the limit ring. Apply a certain force to bring the spring chuck 3 and the locking nut 2 closer to each other. After the conical surface below the spring chuck 3 is squeezed by the limit ring, it undergoes elastic deformation and shrinks slightly inward. After a crisp sound is heard, the groove on the outer surface of the spring chuck 3 fits with the outer surface of the limit ring, and the two are fixed.

[0048] In the initial state, the multiple rotating rods 332 inside the annular cavity 32 are in a horizontal state under the action of the torsion spring 335. In this state, the lower surface of the rotating rod 332 is tightly fitted with the lower surface of the inner wall of the annular cavity 32, and the outer end of the rotating rod 332 and the curved ring block 333 extend to the inside of the middle hole of the spring clamp 3, and the distance from the support seat 331 to the curved ring block 333 is greater than the distance from the support seat 331 to the inner wall surface of the spring clamp 3.

[0049] Select a suitable tool 31, insert the tail of the tool 31 from the large end of the spring chuck 3, at this time, the diameter of the hollow inner wall of the spring chuck 3 is larger than the diameter of the tool 31, and the tool 31 can be inserted into the spring chuck 3 relatively easily. As the tool 31 is continuously inserted, the upper surface of the top of the tool 31 will coincide with the lower surface of the inner wall of the annular cavity 32, and at this time, the top of the tool 31 fits the lower surface of the rotating rod 332. The tool 31 continues to be inserted into the spring chuck 3, and the round edge of the top of the tool 31 contacts the lower surface of the rotating rod 332, and drives the rotating rod 332 to rotate with the shaft as the axis, and the angle between the rotating rod 332 and the bottom of the inner wall of the annular cavity 32 gradually increases.

[0050] As the tool 31 continues to be inserted, the circular edge of the top of the tool 31 no longer contacts the lower surface of the rotating rod 332, and the circular edge of the top of the tool 31 begins to fit with the curved edge at point a of the curved ring block 333. The tool 31 and the curved ring block 333 are in line contact. When the tool 31 continues to slide inside the spring chuck 3, the top of the tool 31 gradually approaches the upper surface of the inner wall of the annular cavity 32. The circular edge of the top of the tool 31 fits with the curved edge at point a of the curved ring block 333, and gradually changes to the circumferential outer surface of the tool 31 fitting with the curved edge at point b of the curved ring block 333 (still in line contact), until the tool 31 reaches the required insertion depth, the circumferential outer surface of the tool 31 always fits with the curved edge at point b of the curved ring block 333.

[0051] When the spring chuck 3 is placed vertically, the heavy-loaded tool 31 has a certain mass, and the gravity of the tool 31 is vertically downward. Under the action of the torsion spring 335, the rotating rod 332 always has a rotation force in the direction of the axis of the tool 31. At the same time, the anti-slip strip 334 is fixed on the outer surface of the circumference of the curved ring block 333. The curved ring block 333 is closely in contact with the outer surface of the circumference of the tool 31 through the anti-slip strip 334, giving the tool 31 a uniform support force in the circumferential direction. At this time, the tool 31 is already inside the spring chuck 3, and the spring chuck 3, the locking nut 2 and the tool 31 form a whole.

[0052] Move the spring chuck 3, the locking nut 2 and the tool 31 toward the bottom of the shank 1 and install them in sequence. At this time, the shank 1 has been installed on the main shaft of the CNC milling machine, and the shank 1 is in a vertical state. Insert the conical surface of the small head at the top of the spring chuck 3 into the middle hole of the shank 1, and alternately distribute the connecting plate 211 and the connecting column 213 on the outer surface of the locking nut 2. Each connecting plate 211 is placed in the middle of two adjacent connecting columns 213, and the connecting plate 211 corresponds to the connecting column 213 one by one. Rotate counterclockwise for a certain distance. During this process, the connecting plate 211 approaches the left connecting column 213. As the distance between the two gets closer and closer, the connecting plate 211 is hung on the outer surface of the connecting column 213 in the direction of the notch 2111. The connecting column 213 enters the inside of the slide groove, and then the top of the spring chuck 3 is inserted into the middle hole of the shank 1 again. Among them, the distance from the bottom end of the inner wall of the slide groove to the horizontal plane where the notch 2111 is located is greater than the height of the thread groove on the outer surface of the shank 1.

[0053] Continue to rotate the locking nut 2, the circumferential outer surface of the connecting column 213 fits with the inner wall side of the slide away from the notch 2111, and as the distance between the locking nut 2 and the handle 1 increases, the distance between the connecting column 213 and the bottom of the inner wall of the slide gets closer and gradually moves away from the notch 2111. The increase in the distance between the locking nut 2 and the handle 1 will apply a uniform inward contraction extrusion force to the spring chuck 3. In this process, the gap on the outer surface of the spring chuck 3 gradually decreases, and the diameter of the hollow inner wall of the spring chuck 3 also gradually decreases. Similarly, the circumferential inner wall of the spring chuck 3 will also uniformly apply a clamping force to the circumferential outer surface of the tool 31. And through the external wrench, it is clamped into the slot on the outer surface of the locking nut 2, driving the locking nut 2 to continue to rotate clockwise, so that the positional relationship between the locking nut 2, the handle 1, the spring chuck 3 and the tool 31 is more closely connected.

[0054] During the tightening process, the spring chuck 3 is uniformly contracted toward the middle tool 31, and the distance between the circumferential inner wall of the annular cavity 32 in the spring chuck 3 and the circumferential outer wall of the tool 31 is reduced. Accordingly, the distance between the support seat 331 and the circumferential outer surface of the tool 31 is also gradually reduced, and the diameter of the circular space surrounded by the multiple support seats 331 is reduced. Correspondingly, the horizontal straight-line distance from the shaft rod in the rotating rod 332 to the circumferential outer surface of the tool 31 is gradually reduced. After the horizontal length of the rotating rod 332 is reduced, it is forced to rotate upward with the shaft rod as the center. The angle between the entire rotating rod 332 and the lower surface of the inner wall of the annular cavity 32 is gradually increased, and the circumferential outer surface of the tool 31 and the curved ring block 333 are gradually transformed from the curved edge at b to the curved edge where the circumferential outer surface of the tool 31 and the curved ring block 333 are in contact and move to point c (still in line contact). During this process, the transfer of the contact position b to c between the circumferential outer surface of the tool 31 and the curved ring block 333 is completed gradually. When the locking nut 2 and the outer surface of the tool handle 1 are completely tightened, the contact curved edge between the curved ring block 333 and the circumferential outer surface of the tool 31 is the curved edge where c is located. At this time, the rotating rod 332 is no longer squeezed. Under the action of the internal torsion spring 335, multiple rotating rods 332 have the force to rotate downward in the direction of the tool 31. The rotating rod 332 gives the curved ring block 333 at its outer end an extrusion force in the circumferential direction of the tool 31. The curved edge at the position of the curved ring block 333c is tightly fitted with the circumferential outer surface of the tool 31. The anti-slip strip 334 embedded on the outer surface of the curved ring block 333 has a certain elasticity, which can reduce the gap between the curved ring block 333 and the circumferential outer surface of the tool 31 and increase the friction between the two.

[0055] The process of removing the locking nut 2 from under the tool holder 1 on the machine tool:

[0056] After the tool 31 is installed on the CNC milling machine, the object to be processed can be milled according to actual needs. When disassembling, use an external wrench to engage in the slot on the outer circumferential surface of the locking nut 2, and the tool handle 1 is fixed, driving the locking nut 2 to rotate counterclockwise. When the locking nut 2 rotates counterclockwise, the connecting plate 211 on its surface will rotate counterclockwise with it, and the connecting column 213 is always inside the slide groove in the connecting plate 211. Therefore, the connecting column 213, the annular plate 212 and the locking nut 2 rotate counterclockwise synchronously, and the annular plate 212 rotates in the inner wall of the annular groove. In this process, the outer circumferential surface of the connecting column 213 is connected to the left side of the inner wall of the slide groove. As the number of counterclockwise rotations increases, the extrusion pressure exerted by the tool handle 1 and the locking nut 2 on the spring chuck 3 gradually decreases. Correspondingly, the inner wall diameter of the spring chuck 3 gradually increases, and the extrusion and clamping force of the circumferential inner surface of the spring chuck 3 on the tool 31 gradually decreases. The circumferential inner wall diameter of the spring chuck 3 increases slowly. During the increase, the distance between the circumferential inner surface of the annular cavity 32 and the circumferential outer surface of the tool 31 gradually increases, and the length occupied by the rotating rod 332 in the horizontal direction becomes larger. The torsion spring 335 always gives the rotating rod 332 a force to squeeze and rotate downward in the direction of the tool 31.

[0057] When the locking nut 2 drives the spring chuck 3 and the tool 31 to separate from the tool handle 1, the diameter enclosed by the circumferential inner wall of the spring chuck 3 is larger than the diameter of the tool 31, but due to the joint action of the multiple curved ring blocks 333 arranged in the circular array, uniform pressure is applied to the circumferential outer surface of the tool 31, supporting the tool 31 to be fixed in this position, avoiding the risk of vertical falling during the disassembly process, and eliminating the need for staff to always pay attention to the positional relationship between the tool 31 and the spring chuck 3 during disassembly, and eliminating the need to use hands to support the tool 31 and the spring chuck 3, thereby avoiding burns caused by high temperature due to the high-speed relative movement of the bottom end of the tool 31 with the workpiece to be processed during milling, and scratches caused by the sharpness of the tool 31, thereby improving production safety.

[0058] At the same time, when the spring chuck 3 and the tool 31 rotate counterclockwise along with the locking nut 2, the outer circumferential surface of the connecting column 213 always fits with the left surface of the inner wall of the slideway (the side away from the notch 2111), and the notch 2111 is on the right side. When rotating counterclockwise, the connecting column 213 will not be separated from the notch 2111. As the connection between the locking nut 2 and the thread groove on the outer surface of the handle 1 becomes shorter and shorter, the locking nut 2, the spring chuck 3 and the tool 31 fall downward under the action of gravity, and the distance between the top of the connecting plate 211 and the annular plate 212 becomes larger. Accordingly, the connecting column 213 gradually moves toward the top of the inner wall of the slideway in the slideway. The descending speed of the locking nut 2 is relatively uniform and slow. Before the locking nut 2 is separated from the handle 1, the distance between the connecting column 213 and the top of the inner wall of the slideway is small. At the moment when the locking nut 2 is separated from the thread groove on the outer surface of the circumference of the handle 1, the highest point of the outer surface of the circumference of the connecting column 213 fits with the upper surface of the inner wall of the slideway. The locking nut 2, the tool 31 and the spring chuck 3 are in a suspended state, relying on the connecting plate 211 to hang on the outer surface of the connecting column 213 on the outer surface of the handle 1. No manual support is required during disassembly, avoiding the situation that the locking nut 2, the tool 31 and the spring chuck 3 may fall and injure people due to manual support, reducing the risk of accidental injury to the operator and ensuring personal safety. The locking nut 2, the tool 31 and the spring chuck 3 and other components will not fall onto the workbench or the ground at will, avoiding the mess in the work area and the damage to the components.

[0059] Finally, the length of the slide groove is greater than the height of the thread groove on the outer surface of the shank 1. The locking nut 2, the tool 31 and the spring chuck 3 are manually lifted up as a whole so that the notch 2111 is at the same height as the connecting column 213, and they are rotated clockwise at a certain angle so that the locking nut 2, the tool 31 and the spring chuck 3 are completely separated from the shank 1 as a whole. At this time, the tool 31 is moved out from above the spring chuck 3. At this point, the disassembly of the tool 31 is completed.

[0060] In summary, the fixture has the following advantages during disassembly and installation:

[0061] Advantage 1. During installation, the tool 31 lifts the rotating rod 332 from the bottom to the top, driving the rotating rod 332 to rotate and tilt upward. After the tool 31 is installed, the rotating rod 332 is in an inclined position, and the curved ring block 333 at its outer end is a rotating body. The points in contact with the circular outer surface of the tool 31 at any position in the horizontal direction are all arc-shaped. The anti-slip strip 334 embedded on the outer surface of the curved ring block 333 has a large friction with the circular outer surface of the tool 31, and the curved ring block 333 is in close contact with the outer surface of the tool 31. Since the rotating rod 332 points directly to the axis center, after rotating and tilting, a pressure toward the axis center will be generated on the tool 31. This pressure toward the axis center will cause a large friction force to be generated between the rotating rod 332 and the tool 31, and this friction force is greater than the gravity exerted on the tool 31, thereby preventing the tool 31 from falling downward. Therefore, during the disassembly process, the staff no longer needs to hold the locking nut 2 and pay attention to the positional relationship between the tool 31 and the spring chuck 3 at all times, thereby avoiding the risk of the tool 31 slipping out of the spring chuck 3 and the risk of being burned or scratched due to the release of the tool 31, thereby ensuring safety of use.

[0062] Advantage 2: There are multiple fixing components 33 arranged in a circular array inside the annular cavity 32, among which the outer end extension direction of the rotating rod 332 passes through the axis of the spring chuck 3, which can evenly apply supporting force to the tool 31 inside it. Each rotating rod 332 provides a certain supporting force to the tool 31. The combined force of these supporting forces can balance the gravity of the tool 31, thereby strengthening the position of the tool 31 and further preventing the tool 31 from falling out of the spring chuck 3.

[0063] Advantage three: the clamp is suitable for tools 31 of different diameters within a certain range. Whether installing or removing the locking nut 2 and the tool handle 1, the action is gradual. Under the action of the torsion spring 335, the curved surface of the rotating body ring block 333 is always in contact with the circumferential outer surface of the tool 31, and the applicability is high.

[0064] Advantage 4: During disassembly, when manually supporting the locking nut 2, the components may be damaged due to accidental collision or uneven force, while the anti-falling part 21 can ensure that the locking nut 2, the spring chuck 3 and the tool 31 will not fall. By hanging on the outer surface of the handle 1, these components can be kept stable, reducing the possibility of damage caused by collision between components or collision with other objects due to human factors during the disassembly process, which is conducive to protecting the accuracy and integrity of the components and extending their service life. The operator can freely perform the disassembly operation with both hands, freeing up hands to more conveniently use tools such as wrenches, thereby completing the disassembly work more efficiently and saving disassembly time.

[0065] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A heavy-duty milling cutter fixture suitable for CNC machine tools, characterized in that: include: A tool handle (1), wherein the tool handle (1) is detachably mounted on an external machine tool; A locking nut (2), wherein the locking nut (2) is threadedly connected to the circumferential outer surface of the shank (1); A spring chuck (3), wherein the tool handle (1) is sleeved on the outer surface of the spring chuck (3), a tool (31) is connected to the inside of the spring chuck (3), an annular cavity (32) is provided on the inner wall surface of the spring chuck (3), and a fixing component (33) is provided inside the annular cavity (32) for maintaining the relative position relationship between the spring chuck (3) and the tool (31); The fixing assembly (33) comprises a support seat (331) fixedly connected to the bottom of the inner wall of the annular cavity (32); the support seat (331) is rotatably connected to a rotating rod (332) via a shaft fixedly connected to the outer surface thereof; and one end of the rotating rod (332) away from the support seat (331) is fixedly connected to a curved ring block (333) that fits the outer circumferential surface of the tool (31); Wherein, an anti-falling part (21) is provided on the circumferential outer surface of the locking nut (2).

2. A heavy-duty milling cutter fixture suitable for CNC machine tools according to claim 1, characterized in that: The circumferential outer surface of the curved ring block (333) is designed with an axisymmetric structure that fits the circumferential outer surface of the tool (31), and the minimum point of the radius of the circumferential outer surface of the curved ring block (333) is located in the middle.

3. A heavy-duty milling cutter fixture suitable for CNC machine tools according to claim 2, characterized in that: The rotating rods (332) are provided in plurality and are distributed in an annular array outside the circumference of the cutter (31); the curved ring block (333) is provided with an anti-slip strip (334) through a hollow groove provided on the outer surface of the circumference thereof.

4. The heavy-duty milling cutter fixture suitable for CNC machine tools according to claim 1, characterized in that: The circumferential outer surface of the shaft rod is provided with a torsion spring (335) connected to the inside of the rotating rod (332). In the initial state, the rotating rod (332) is in a horizontal state, and the lower surface of the rotating rod (332) is in contact with the lower surface of the inner wall of the annular cavity (32).

5. The heavy-duty milling cutter fixture suitable for CNC machine tools according to claim 1, characterized in that: The anti-falling component (21) comprises a connecting plate (211), wherein the connecting plate (211) is fixedly connected to the circumferential outer surface of the locking nut (2); the knife handle (1) is rotatably connected to an annular plate (212) via an annular groove provided on the circumferential outer surface thereof; the circumferential outer surface of the annular plate (212) is fixedly connected to a connecting column (213); a plurality of connecting columns (213) are provided and are distributed in a circumferential array with the locking nut (2) as the center; and a retaining groove is provided on the circumferential outer surface of the locking nut (2).

6. A heavy-duty milling cutter fixture suitable for CNC machine tools according to claim 5, characterized in that: The connecting plate (211) is slidably connected to the circumferential outer surface of the connecting column (213) via a sliding groove provided therein; a notch (2111) is provided inside the connecting plate (211), and the inside of the notch (2111) is connected to the inside of the sliding groove.

7. A heavy-duty milling cutter fixture suitable for CNC machine tools according to claim 6, characterized in that: The notch (2111) is opened on one side of the upper part of the connecting plate (211), and the inner wall surface of the notch (2111) is designed in a circular arc.

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