Tool pouch structure for machine tool, tool magazine of numerical control machine tool and numerical control machine tool

Abstract

The invention relates to the technical field of machine tool equipment, in particular to a cutter sleeve structure for a machine tool cutter, a numerical control machine tool magazine and a numerical control machine tool, the cutter sleeve structure for the machine tool cutter comprises a cutter sleeve body, a locking rod and an elastic locking sleeve, an axial cutter storage channel is arranged in the cutter sleeve body, and the locking rod is arranged in the cutter storage channel in an axial movement mode; the middle part of the locking rod is provided with a conical peripheral surface, the elastic locking sleeve is sleeved on the conical surface and can radially expand or contract under the axial movement of the locking rod, and the front end of the elastic locking sleeve is provided with a hooking part locked with a cutter. During working, a cutter is installed to push the locking rod to move, the conical surface drives the elastic locking sleeve to expand and lock the cutter, and meanwhile the cutter and the taper hole of the cutter sleeve body are self-locked; when the cutter is taken, the locking rod moves reversely, and the elastic locking sleeve shrinks to be separated from the cutter. The structure is stable and impact-free in the storing and taking process, and clamping stagnation and damage of parts are avoided; the locking force comes from tool self-locking instead of a spring, the same tool pouch can be universally used for clamping light and heavy tools, the reliability is remarkably improved, and the tool magazine design is simplified.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of machine tool equipment, in particular to a tool holder structure for machine tool cutters, a numerical control machine tool cutter magazine and a numerical control machine tool. BACKGROUND

[0002] In the automatic tool changing system of a numerical control machine tool, the tool holder is a key functional component for storing and clamping cutters in the cutter magazine. The tool holder commonly used in the prior art is of a passive locking structure, and its typical principle is as follows: three to four steel balls are uniformly arranged in the radial direction of the positioning sleeve of the tool holder, a locking rod is driven to move by a compression spring, the steel balls are driven to move in the radial direction by the conical surface at the front end of the locking rod, the steel balls are in contact with the conical surface of the cutter, and the locking of the steel balls on the cutter is maintained by the spring force, so as to realize the clamping of the cutter.

[0003] However, the passive locking mode has obvious inherent defects: first, in the process of storing and accessing the cutter, the cutter and the steel ball are not in continuous contact, when the tool changing mechanism moves too fast or there is a centering deviation, a large inertial impact will be generated, which is easy to cause damage to the steel ball and the locking rod, cause deformation of the limiting conical hole, scratch on the surface of the steel ball, or even cause the steel ball to be stuck in the positioning sleeve, and finally cause the tool holder to be unable to normally store and access the cutter, and the reliability is low. Second, the locking force completely depends on the spring, if a heavy cutter is clamped, the pre-tightening force of the spring must be increased, which requires a larger specification of the spring to be used in the limited space of the tool holder, and the design difficulty is great; on the contrary, if a light cutter is clamped, the excessive spring force may cause unnecessary wear and even damage, therefore, the traditional passive locking type tool holder is difficult to realize the universal clamping of light and heavy cutters in the same structure, and the applicability is limited.

[0004] Therefore, there is an urgent need in the art for a new type of tool holder structure which can overcome the above-mentioned shortcomings of passive locking and realize more stable, reliable and universal clamping of cutters. SUMMARY

[0005] The present application provides a tool holder structure for machine tool cutters, a numerical control machine tool cutter magazine and a numerical control machine tool, to solve the defects of poor reliability and universality of the tool holder of the passive locking structure in the prior art, and to realize self-locking of the cutter by using an active locking structure.

[0006] The present application provides a tool holder structure for machine tool cutters, comprising a tool holder body, a locking rod and an elastic locking sleeve, a tool storage channel is formed in the tool holder body along the axial direction thereof, a first end of the tool storage channel is connected to a fixed flange, and a second end of the tool storage channel is used for the entry and exit of a cutter; the locking rod is movably arranged in the tool storage channel along the axis of the tool holder body, a tapered outer surface is formed on the outer periphery of the middle part of the locking rod; the cutter is connected to the end of the locking rod close to the second end of the tool storage channel; the elastic locking sleeve is movably sleeved on the tapered outer surface of the locking rod, and is adapted to expand or contract radially under the axial movement of the locking rod; a hooking part for locking the cutter is formed on the first end of the elastic locking sleeve.

[0007] According to the present application, the locking rod comprises a first cylindrical segment, a recessed segment, a tapered segment and a second cylindrical segment, the first end of the first cylindrical segment is used for connecting the cutter; the first end of the recessed segment is integrally formed with the second end of the first cylindrical segment, and the diameter of the recessed segment is smaller than that of the first cylindrical segment; the first end of the tapered segment is integrally formed with the second end of the recessed segment, and the tapered segment is used for forming the tapered outer surface; the first end of the second cylindrical segment is integrally formed with the second end of the tapered segment.

[0008] According to the present application, the elastic locking sleeve comprises locking claws and an annular spring, and the plurality of locking claws are uniformly distributed along the circumference of the locking rod; the annular spring is sleeved on the outer periphery of the plurality of locking claws in the circumferential direction.

[0009] According to the present application, the locking claw comprises a tapered surface contact part, a connecting segment and a hook claw part, the tapered surface contact part is movably sleeved on the tapered outer surface of the locking rod, and a groove for assembling the annular spring is formed on the outer side of the tapered surface contact part; the first end of the connecting segment is connected to the tapered surface contact part; the hook claw part is connected to the second end of the connecting segment, the hook claw part forms the hooking part on the side away from the locking rod, and the hooking part has a tapered inclined surface.

[0010] According to the present application, a long strip-shaped slot hole is formed on the connecting segment, a rectangular protrusion adapted to the long strip-shaped slot hole is formed on the outer periphery surface of the recessed segment of the locking rod, and the rectangular protrusion is arranged in the long strip-shaped slot hole.

[0011] According to the present invention, a tool holder structure for machine tool tools is provided, wherein an annular protrusion is formed on the inner wall of the tool storage channel of the tool holder body, a positioning sleeve is connected to the inner side of the fixing flange, and the conical contact portion of the locking pawl is located between the annular protrusion and the positioning sleeve to form an axial limit on the locking pawl.

[0012] According to the present invention, a tool sleeve structure for machine tool cutting tools is provided, wherein a sliding sleeve is fixedly sleeved on the outer periphery of the second cylindrical section of the locking rod, a connecting rod is connected to the second end of the second cylindrical section of the locking rod, the connecting rod passes through the fixed flange, and a return spring is sleeved on the outer periphery of the connecting rod, one end of the return spring abuts against the sliding sleeve, and the other end abuts against the fixed flange.

[0013] According to the present invention, a tool holder structure for machine tool tools is provided, wherein the inner wall of the second end of the tool storage channel of the tool holder body is configured as a tapered channel, and a positioning snap-fit ​​is provided at the inner end of the tapered channel, the positioning snap-fit ​​being adapted to the rectangular recess at the tail end of the tool.

[0014] The present invention also provides a CNC machine tool magazine, including the tool holder structure for machine tool described in any one of the above claims.

[0015] The present invention also provides a CNC machine tool, including the above-mentioned CNC machine tool magazine.

[0016] The tool holder structure for machine tool cutting tools provided by this invention consists of a tool holder body, a locking rod, an elastic locking sleeve, and a fixing flange. When a tool is inserted, the tool pushes the locking rod to move axially, driving the elastic locking sleeve to expand radially through its conical surface, locking its front hook portion with the tool. Simultaneously, the conical surface of the tool and the conical hole of the tool holder body form a self-locking mechanism. When the tool is removed, the locking rod moves in the opposite direction, and the elastic locking sleeve contracts radially under the action of a ring spring, disengaging the hook portion from the tool. This tool holder structure for machine tool cutting tools effectively overcomes the defects of traditional passive locking tool holders. Its insertion and removal process is smooth and shock-free, avoiding component jamming and damage. Furthermore, the locking is achieved through the tool's self-locking principle, allowing the same tool holder to universally hold both light and heavy tools without replacing components, significantly improving reliability and simplifying tool magazine design. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the locked-tool state structure of the tool sleeve structure for machine tool provided by the present invention.

[0019] Figure 2 yes Figure 1 A schematic diagram of the AA cross-section.

[0020] Figure 3 This is a schematic diagram of the tool sleeve structure for machine tool cutting tools in the tool release state provided by the present invention.

[0021] Figure 4 This is a schematic diagram of the locking rod provided by the present invention.

[0022] Figure 5 This is a schematic diagram of the structure of the elastic locking sleeve provided by the present invention.

[0023] Reference numerals: 1. Tool sleeve body; 11. Annular protrusion; 12. Positioning clip; 2. Fixed flange; 3. Locking rod; 31. First cylindrical section; 32. Recessed section; 33. Conical section; 34. Second cylindrical section; 35. Rectangular protrusion; 4. Tool; 5. Elastic locking sleeve; 51. Locking claw; 511. Conical contact part; 512. Connecting section; 513. Hook part; 514. Long slot; 52. Annular spring; 6. Positioning sleeve; 7. Sliding sleeve; 8. Connecting rod; 9. Return spring. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0025] The following is combined Figures 1 to 5 The present invention describes a tool holder structure for machine tool cutting tools, a CNC machine tool tool magazine, and a CNC machine tool.

[0026] One embodiment of the present invention provides a tool holder structure for machine tool cutting tools, combined with Figure 1 and Figure 2As shown, the tool holder structure for machine tool tools includes a tool holder body 1, a locking rod 3, and an elastic locking sleeve 5. A tool storage channel is formed inside the tool holder body 1 along its axial direction. The first end of the tool storage channel is connected to a fixed flange 2, and the second end of the tool storage channel is used for tool entry and exit. The locking rod 3 is movably disposed in the tool storage channel along the axis of the tool holder body 1, and a tapered outer circumference is formed on the middle outer periphery of the locking rod 3. The tool 4 is connected to the end of the locking rod 3 near the second end of the tool storage channel. The elastic locking sleeve 5 is movably fitted onto the tapered outer circumference of the locking rod 3. The elastic locking sleeve 5 is adapted to expand or contract radially under the axial movement of the locking rod 3. The first end of the elastic locking sleeve 5 has a hook portion for locking with the tool 4.

[0027] It is understood that this embodiment of the tool holder structure for machine tool cutting tools consists of a tool holder body 1, a locking rod 3, an elastic locking sleeve 5, and a fixing flange 2. The tool holder body 1 has an axial tool storage channel. One end of the tool storage channel is installed to the tool magazine via the fixing flange 2, and the other end allows the tool 4 to enter and exit. The locking rod 3 is axially movable within the channel, and has a tapered surface in the middle section. The elastic locking sleeve 5 (usually composed of a multi-lobed locking claw 51 and a ring spring 52) is fitted onto the tapered section of the locking rod 3. When the tool 4 is inserted, the tool 4 pushes the locking rod 3 axially, and its tapered surface forces the elastic locking sleeve 5 to expand radially until its front hook portion locks with the corresponding structure of the tool 4. Simultaneously, the tapered surface of the tool 4 forms a self-locking connection with the tapered hole of the tool holder body 1. The locked tool holder structure is as follows: Figure 1 As shown; when the tool 4 is removed, the locking rod 3 moves in the opposite direction, and the elastic locking sleeve 5 contracts radially under the action of the annular spring 52, disengaging the hook part from the tool 4, thus pushing the tool 4 out. The tool sleeve structure that releases the tool is as follows. Figure 3 As shown.

[0028] The tool holder structure for machine tool cutting tools in this embodiment effectively overcomes the inherent defects of passively locking tool holders in the prior art. Firstly, the storage and retrieval process is smooth and shock-free: the locking rod 3 and the elastic locking sleeve 5 are always in contact and linked, avoiding the inertial impact caused by intermittent contact in traditional steel ball structures, significantly improving reliability and preventing component jamming or damage. Secondly, true structural universality is achieved: the locking force mainly comes from the self-locking of the tool 4 and the tapered surface of the tool holder body 1, rather than the spring preload; the elastic locking sleeve 5 only serves to confirm and trigger the locking. Therefore, the same tool holder can stably clamp different tools, from light to heavy-duty, without replacing internal springs or other components, greatly expanding the application range and simplifying tool magazine design.

[0029] In some embodiments of the tool sleeve structure for machine tool cutting tools of the present invention, see Figure 4As shown, the locking rod 3 includes a first cylindrical section 31, a recessed section 32, a tapered section 33, and a second cylindrical section 34. The first end of the first cylindrical section 31 is used to connect the tool 4. The first end of the recessed section 32 is integrally formed with the second end of the first cylindrical section 31, and the diameter of the recessed section 32 is smaller than the diameter of the first cylindrical section 31. The first end of the tapered section 33 is integrally formed with the second end of the recessed section 32, and the tapered section 33 is used to form a tapered outer circumferential surface. The first end of the second cylindrical section 34 is integrally formed with the second end of the tapered section 33.

[0030] The locking rod 3 of the tool sleeve structure for machine tool tools in this embodiment adopts an integrally formed four-section stepped shaft structure, consisting of a first cylindrical section 31, a recessed section 32, a tapered section 33, and a second cylindrical section 34. The front end of the first cylindrical section 31 is used to directly connect to or abut against the tool 4; the diameter of the recessed section 32 connected thereafter is significantly smaller than that of the first cylindrical section 31, forming an annular radial space; the rear end of the recessed section 32 is connected to the tapered section 33, and the outer circumferential surface of the tapered section 33 is the working inclined surface that drives the locking claw to move; the last section, the second cylindrical section 34, is used to install the sliding sleeve 7, the return spring 9, and other reset mechanisms, and is connected to an external drive device.

[0031] The locking rod 3 has a clearly defined function for each section during implementation, and they work in concert: When the tool 4 is inserted and pushes the locking rod 3, the first cylindrical section 31 directly transmits axial force, the recessed section 32 provides the necessary space for the external locking claws to retract, and the tapered section 33 is the core of power conversion, its axial movement is converted into the radial expansion motion of the elastic locking sleeve 5, thereby clamping the tool 4. When the tool is released, the external driving force acts on the second cylindrical section 34, causing the entire locking rod 3 to move in the opposite direction. The tapered section 33 releases the drive on the elastic locking sleeve 5, allowing it to reset and retract under the action of the annular spring 52, thereby releasing the tool.

[0032] In some embodiments of the tool sleeve structure for machine tool cutting tools of the present invention, see again Figure 1 As shown, the elastic locking sleeve 5 includes locking claws 51 and annular springs 52. The multi-lobed locking claws 51 are evenly distributed circumferentially along the locking rod 3; the annular springs 52 are circumferentially fitted around the outer periphery of the multi-lobed locking claws 51. Specifically, in some examples, see [link to example]. Figure 5 As shown, the locking claw 51 includes a conical contact portion 511, a connecting section 512, and a hook portion 513. The conical contact portion 511 is movably fitted onto the conical outer peripheral surface of the locking rod 3. A groove for assembling the annular spring 52 is formed on the outer side of the conical contact portion 511. The first end of the connecting section 512 is connected to the conical contact portion 511. The hook portion 513 is connected to the second end of the connecting section 512. A hook portion is formed on the side of the hook portion 513 facing away from the locking rod 3. The hook portion has a conical inclined surface.

[0033] It is understood that the elastic locking sleeve 5 in this embodiment consists of two core components: multiple locking claws 51 and a ring spring 52. The multiple locking claws 51 are evenly distributed circumferentially along the locking rod, forming a ring structure. Each locking claw 51 is further divided into three functional parts: a conical contact portion 511 whose inner side mates with the conical outer circumferential surface of the locking rod 3, and whose outer side has an annular groove for mounting the ring spring 52; a connecting section 512 connected at one end to the conical contact portion 511; and a hook portion 513 located at the end of the connecting section 512, with a hook portion with a conical bevel on its back for direct engagement with the tool 4. The ring spring 52 is tightly clamped within the groove on the outer circumference of all the locking claws 51, providing them with an elastic restoring force for radial contraction.

[0034] During operation, when the locking rod 3 moves axially, its tapered section 33 presses against the tapered contact portion 511 of the locking claw 51. Due to the restraint of the annular spring 52, this axial force is converted into a radial expansion motion of the locking claw 51 as a whole. The connecting section 512 then undergoes elastic deformation, ultimately causing the hook portion 513 to extend outward and lock the tool 4. Conversely, when the locking rod 3 moves in the opposite direction to release the pressure, the contraction force of the annular spring 52 pulls all the tapered contact portions 511 of the locking claws 51, causing them to slide back along the tapered surface of the locking rod 3, driving the hook portion to retract radially, thereby disengaging from the tool 4 and completing the tool release action. The tapered slope on the back of the hook portion 513 ensures a smooth and seamless process of contact and separation from the tool 4.

[0035] Furthermore, an elongated slot 514 is formed on the connecting section 512, and a rectangular protrusion 35 adapted to the elongated slot 514 is formed on the outer peripheral surface of the recessed section 32 of the locking rod 3. The rectangular protrusion 35 passes through the elongated slot 514. It can be understood that the elongated slot 514 is formed on the connecting section 512 of the locking pawl 51, and a precisely matching rectangular protrusion 35 is provided on the outer peripheral surface of the recessed section 32 of the locking rod 3. The rectangular protrusion 35 passes into the elongated slot 514, forming a sliding pair. The length direction of the elongated slot 514 is consistent with the required radial movement direction of the locking pawl 51, and its length determines the limit stroke of the radial movement of the locking pawl 51.

[0036] In some embodiments of the tool holder structure for machine tool tools of the present invention, an annular protrusion 11 is formed on the inner wall of the tool storage channel of the tool holder body 1, a positioning sleeve 6 is connected to the inner side of the fixing flange 2, and the conical contact portion 511 of the locking claw 51 is located between the annular protrusion 11 and the positioning sleeve 6 to form an axial limit on the locking claw 51.

[0037] It is understood that in this embodiment, the annular protrusion 11 inside the tool holder body 1 and the positioning sleeve 6 fixed to the inner side of the fixed flange 2 together constitute the axial limiting structure of the locking claw 51. The annular protrusion 11 protrudes from the inner wall of the tool storage channel toward the central axis, forming an internal step or retaining edge. The positioning sleeve 6 is an independent annular part, which is fixedly installed on the fixed flange 2 by screw connection or other means and extends into the tool storage channel. The conical contact portion 511 of the locking claw 51 is precisely installed between the annular protrusion 11 and the positioning sleeve 6, and the two axial end faces of the conical contact portion 511 are close to or in contact with the side face of the annular protrusion 11 and the end face of the positioning sleeve 6, respectively.

[0038] During the operation of the tool holder, the axial limiting structure of the locking claw 51 ensures the absolute fixation of the axial position of the locking claw 51. When the locking rod 3 drives the locking claw 51 to perform radial expansion or contraction, the annular protrusion 11 and the positioning sleeve 6 act like two solid blocks, firmly restricting the conical contact portion 511 of the locking claw 51 from both sides, preventing any axial displacement. This rigid axial limiting ensures that the conical contact portion 511 of the locking claw 51 can only move radially in cooperation with the conical surface of the locking rod 3, and will not deviate from the correct working position due to axial movement, thereby ensuring the accuracy of force transmission and the reliability of clamping action.

[0039] In some embodiments of the tool sleeve structure for machine tool cutting tools of the present invention, see also... Figure 1 or Figure 3 As shown, a sliding sleeve 7 is fixedly sleeved on the outer periphery of the second cylindrical section 34 of the locking rod 3, and a connecting rod 8 is connected to the second end of the second cylindrical section 34 of the locking rod 3. The connecting rod 8 passes through the fixed flange 2, and a return spring 9 is sleeved on the outer periphery of the connecting rod 8. One end of the return spring 9 abuts against the sliding sleeve 7, and the other end abuts against the fixed flange 2.

[0040] It is understood that in this embodiment, the sliding sleeve 7, the connecting rod 8, and the return spring 9 constitute the reset and drive mechanism. The sliding sleeve 7 is fixedly sleeved on the outer periphery of the second cylindrical section 34 of the locking rod 3, serving as a movable spring seat. The front end of the connecting rod 8 is connected to the second end of the locking rod 3, and the tail end passes through the central hole of the fixed flange 2 and extends to the outside of the blade sleeve for connection with an external drive device. The return spring sleeve 9 is on the outer periphery of the connecting rod 8, with its two ends abutting against the end face of the sliding sleeve 7 and the inner end face of the fixed flange 2, respectively.

[0041] This embodiment achieves automatic reset and external drive functions for the locking lever 3 through a reset and drive mechanism: In its natural state, see... Figure 1 As shown, the preload of the return spring 9 pushes the sliding sleeve 7, forcing the entire locking rod 3 assembly to its limit position (i.e., locked or ready-to-lock state) in the direction of the tool 4. When tool release is required, see [reference needed]. Figure 3As shown, the external drive device pulls the connecting rod 8, and the connecting rod 8 drives the locking rod 3 to move backward axially against the force of the return spring 9, thus performing the tool release action. Once the external drive force is released, the return spring 9 immediately pushes the sliding sleeve 7 and the locking rod 8 to reset, preparing for the next clamping action, thereby realizing a complete and cyclical active control process.

[0042] In some embodiments of the tool holder structure for machine tool tools of the present invention, the inner wall of the second end of the tool storage channel of the tool holder body 1 is configured as a tapered channel, and a positioning latch 12 is provided at the inner end of the tapered channel. The positioning latch 12 is adapted to the rectangular recess at the tail end of the tool 4. It can be understood that in this embodiment, a tapered channel and a positioning latch 12 are designed at the tool inlet and outlet ends of the tool storage channel of the tool holder body 1. The tapered channel is a natural extension of the inner wall at the end of the tool storage channel, and its diameter gradually increases, so that the tool storage channel forms a funnel-shaped guide surface from the outside to the inside. At the innermost end of the tapered channel, that is, the end closest to the inside of the tool holder, a positioning latch 12 is installed. This component is usually a rigid protruding key or pin, the shape of which precisely matches the rectangular recess (or orientation groove) pre-machined at the end of the tool shank.

[0043] This embodiment achieves precise guidance and circumferential angle positioning of the tool 4 through a tapered channel and a positioning latch 12: When the tool 4 is fed into the tool holder, its shank first contacts the inclined surface of the tapered channel. This tapered surface automatically corrects the axis of the tool, guiding it to accurately center and slide deep into the tool storage channel. As the tool continues to penetrate deeper, the rectangular recess at the end of its shank contacts and eventually engages with the positioning latch 12 fixed in the channel. This engagement forces the tool 4 to rotate to a specific circumferential angle until the recess and latch are fully aligned and engaged, thus ensuring that the tool is given a unique and precise circumferential position in the tool holder, achieving the angle orientation function.

[0044] In another aspect, the present invention provides a CNC machine tool tool magazine, including a tool holder structure for machine tool as described in any of the above embodiments or examples. The CNC machine tool tool magazine of the present invention, by employing the tool holder structure for machine tool as described in any of the foregoing embodiments or examples, improves upon the traditional passive locking tool holder. The tool holder structure for machine tool is mounted on a corresponding support or drive chain of the tool magazine via its fixing flange 2. The tool magazine body also includes a drive source (such as a motor or cylinder), a transmission mechanism (such as a cam or chain), and a control system for precisely controlling the movements required for tool selection, tool changing, etc., of these tool holders. During the operation of the tool magazine, when it is necessary to store, retrieve, or change a certain tool, the tool magazine's control system first drives the tool magazine body to move, precisely positioning the target tool holder structure to the tool changing position. Subsequently, the external drive mechanism of the tool magazine (such as the drive rod on the tool changing robot) engages with the end of the tool holder connecting rod. By pushing forward or pulling backward on the connecting rod 8, the tool holder can be controlled to perform a complete tool release or locking action, thus cooperating with the tool changing robot to complete the tool gripping, loading, unloading, and storage process. Because each tool holder has active, stable, and reliable clamping characteristics, the entire tool magazine tool changing process is more efficient and stable, and can accommodate tools of different weights.

[0045] Another aspect of the present invention provides a CNC machine tool, including the CNC machine tool tool magazine described above. The automatic tool changing system of the CNC machine tool of the present invention integrates the CNC machine tool tool magazine provided above. The tool magazine of the CNC machine tool does not employ a traditional passive locking tool holder solution, but is constituted by the tool magazine system of the present invention, which possesses active locking, smooth storage and retrieval, and excellent versatility characteristics. The CNC machine tool body of the present invention includes standard components such as the bed, spindle box, feed system, and control system. The tool magazine, as a key functional module, is tightly integrated with the machine tool spindle, tool changing robot, and other components through mechanical interfaces and electrical control circuits, together forming the complete machine. During machine tool processing, when a tool changing operation is required, the machine tool control system sends a command to the CNC machine tool tool magazine. The tool magazine, according to the command, drives its internal tool holder structure to move to the tool changing position and precisely coordinates with the tool changing robot to complete the operation. Specifically, the connecting rod 8 of the tool holder in the tool magazine is driven by the tool changing system, controlling the locking mechanism inside the tool holder to perform smooth and shock-free tool release and locking actions, realizing reliable tool exchange between the tool magazine and the spindle. Because this tool magazine can universally hold light and heavy tools and has high reliability, the machining flexibility, tool changing efficiency, and long-term operational stability of the entire CNC machine tool are significantly improved.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A tool holder structure for machine tool cutting tools, characterized in that, include: The tool holder (1) has a tool storage channel formed inside it along its axial direction. The first end of the tool storage channel is connected to the fixed flange (2), and the second end of the tool storage channel is used for the entry and exit of the tool (4). The locking rod (3) is movably disposed in the tool storage channel along the axis of the tool sleeve body (1), and the outer periphery of the middle part of the locking rod (3) forms a conical outer circumferential surface; the tool (4) is connected to the end of the locking rod (3) near the second end of the tool storage channel; The elastic locking sleeve (5) is movably fitted onto the tapered outer circumferential surface of the locking rod (3). The elastic locking sleeve (5) is adapted to expand or contract radially under the axial movement of the locking rod (3). The first end of the elastic locking sleeve (5) is formed with a hook portion for locking with the cutting tool (4).

2. The tool holder structure for machine tool cutting tools according to claim 1, characterized in that, The locking rod (3) includes: The first cylindrical segment (31) has its first end used to connect the cutting tool (4). The recessed section (32) has its first end integrated with the second end of the first cylindrical section (31), and the diameter of the recessed section (32) is smaller than the diameter of the first cylindrical section (31). A tapered segment (33), the first end of which is integrally formed with the second end of the recessed segment (32), the tapered segment (33) being used to form the tapered outer peripheral surface; The second cylindrical segment (34) has its first end integrated with the second end of the conical segment (33).

3. The tool sleeve structure for machine tool cutting tools according to claim 2, characterized in that, The elastic locking sleeve (5) includes: Locking claws (51), the multi-lobed locking claws (51) are evenly distributed circumferentially along the locking rod (3); A ring spring (52) is circumferentially fitted around the outer periphery of the multi-lobed locking claw (51).

4. The tool sleeve structure for machine tool cutting tools according to claim 3, characterized in that, The locking claw (51) includes: The conical contact part (511) is movably fitted onto the conical outer peripheral surface of the locking rod (3), and a groove for assembling the annular spring (52) is formed on the outer side of the conical contact part (511). A connecting segment (512), the first end of which is connected to the conical contact portion (511); The hook portion (513) is connected to the second end of the connecting section (512). The hook portion (513) forms the hook part on the side opposite to the locking rod (3). The hook part has a tapered slope.

5. The tool sleeve structure for machine tool cutting tools according to claim 4, characterized in that, The connecting section (512) has an elongated slot (514) formed thereon, and the outer peripheral surface of the recessed section (32) of the locking rod (3) has a rectangular protrusion (35) adapted to the elongated slot (514), and the rectangular protrusion (35) passes through the elongated slot (514).

6. The tool sleeve structure for machine tool cutting tools according to claim 4, characterized in that, The inner wall of the tool storage channel of the tool sleeve body (1) is formed with an annular protrusion (11), and the inner side of the fixed flange (2) is connected with a positioning sleeve (6). The conical contact part (511) of the locking claw (51) is located between the annular protrusion (11) and the positioning sleeve (6) to form an axial limit on the locking claw (51).

7. The tool holder structure for machine tool cutting tools according to any one of claims 2 to 6, characterized in that, A sliding sleeve (7) is fixedly sleeved on the outer periphery of the second cylindrical section (34) of the locking rod (3). A connecting rod (8) is connected to the second end of the second cylindrical section (34) of the locking rod (3). The connecting rod (8) passes through the fixed flange (2). A return spring (9) is sleeved on the outer periphery of the connecting rod (8). One end of the return spring (9) abuts against the sliding sleeve (7), and the other end abuts against the fixed flange (2).

8. The tool holder structure for machine tool cutting tools according to any one of claims 1 to 6, characterized in that, The inner wall of the second end of the tool storage channel of the tool sleeve body (1) is set as a tapered channel, and the inner end of the tapered channel is provided with a positioning snap fastener (12), which is adapted to the rectangular recess at the tail end of the tool (4).

9. A tool magazine for a CNC machine tool, characterized in that, Includes the tool holder structure for machine tool cutting tools as described in any one of claims 1 to 8.

10. A CNC machine tool, characterized in that, Includes the CNC machine tool magazine as described in claim 9.

Images