Incremental extension self-conveying central tool magazine and working method thereof

Abstract

The present application relates to the field of tool magazine, particularly relates to a kind of incremental extension self-transport central tool magazine and its working method. Including chain tool magazine, fixed frame, first fixed tubular part, second fixed tubular part and knob part;Chain tool magazine is set in a plane in spiral form;Fixed frame is located at the chain outside of chain tool magazine, and is opposite the link of chain, and fixed frame is used to set fixed seat;First positioning tubular part is fixed in one side of the back of fixed frame, second positioning tubular part is fixed in the other side of the back of fixed frame, and the first positioning tubular part of one fixed frame back is rotatably connected with the second positioning tubular part of adjacent one fixed frame back;Knob part is rotatably installed on second positioning tubular part, and when knob part rotates to cover opening, knob part inner surface protrudes and fills opening. Avoid the shaking in vertical direction during the operation of chain, and reduce the wear and tear of chain in transmission process, improve the transmission stability of chain and the positioning accuracy of tool.

Description

Technical Field

[0001] This invention relates to the field of tool magazines, and in particular to an incrementally expandable self-feeding central tool magazine and its operating method. Background Technology

[0002] A tool magazine is a tool storage or tool changing device in a CNC machining center. As an important type of tool magazine, the chain tool magazine is widely used in CNC machining centers due to its large capacity.

[0003] Compared to disc-type guideways, chain tool magazines have the advantage of larger tool capacity. However, the traditional chain structure of chain tool magazines involves "placing" the tools on the chain. The chain needs to move back and forth during operation, which cannot achieve rigid support for the entire chain. In other words, for chain tool magazines, the chain is both the load-bearing system and the transmission system. Therefore, chain tool magazines suffer from poor mechanical rigidity and poor positioning accuracy. Similarly, although current chain tool magazines have a large capacity, most of them increase the capacity by using space substitution, which is difficult to apply in locations with limited space. Summary of the Invention

[0004] Therefore, it is necessary to provide an incrementally expanding self-feeding central tool magazine and its working method to address the above-mentioned technical problems. This avoids vertical swaying of the chain during operation, reduces chain wear during transmission, and improves the transmission stability of the chain and the positioning accuracy of the tool.

[0005] This invention provides an incrementally expandable self-feeding central tool magazine, comprising:

[0006] The chain-type tool magazine is arranged in a spiral pattern on a plane, thereby increasing the length and capacity of the chain-type tool magazine;

[0007] A fixing frame is located around the chain of the chain-type tool magazine and directly opposite the chain links. The fixing frame is used to set a fixing seat for loading the tool.

[0008] A first positioning tube and a second positioning tube, wherein the first positioning tube is fixed to one side of the back of the fixing frame and the second positioning tube is fixed to the other side of the back of the fixing frame, and the first positioning tube on the back of one fixing frame is rotatably connected to the second positioning tube on the back of an adjacent fixing frame.

[0009] A mounting cavity is provided at the joint between the first positioning tube and the second positioning tube. The mounting cavity is used to add a structure or substance that reduces friction. An opening is provided at one end of the first positioning tube that is attached to the second positioning tube. The structure or substance that reduces friction is added to the mounting cavity through the opening.

[0010] A knob is rotatably mounted on the second positioning tube, and when the knob is rotated to cover the opening, the inner surface of the knob protrudes and fills the opening.

[0011] In one embodiment, the chain tool magazine is fixed on a plane on one side of the machine tool, and a three-axis adjustment component is provided on the other adjacent side of the machine tool. The adjustment end of the three-axis adjustment component is equipped with a tool changing mechanism for changing the tools in the chain tool magazine.

[0012] In one embodiment, the first positioning tube includes a first fixing plate and a first fixing tube. Two first fixing plates are provided on the back of the fixing frame. The first fixing tube is fixed to one side of the first fixing plate. The second positioning tube includes a second fixing plate and a second fixing tube. The second fixing plate is provided on the back of the fixing frame and is located between the two first fixing plates. The second fixing tube is located on the other side of the second fixing plate. The first fixing tube and the second fixing tube, which are coaxially arranged, are rotatably connected by a pin.

[0013] In one embodiment, the knob includes an annular limiting member, a top block, and a return spring. The inner surface of the annular limiting member has a first groove arranged in an annular structure. The annular limiting member is threaded onto the first fixed pipe. Multiple top blocks are arranged in an annular array, and the bottom ends of the multiple top blocks are located inside the annular limiting member and are elastically connected to the central axis of the annular limiting member through multiple return springs.

[0014] In one embodiment, the annular limiting member includes a first fixing ring, a second fixing ring, a second fixing rod, and a first limiting plate. Two first fixing rings are coaxially arranged, and the gap between the two first fixing rings forms the first slot. The second fixing ring has an arc-shaped cross-section, and its two ends are respectively connected to the outer surface of another first fixing ring. Multiple second fixing rods are arranged in a circular array, with one end fixed to the inner surface of the second fixing ring and the other end facing the central axis of the first fixing ring. Multiple first limiting plates are provided, and each is fixed to one end of the second fixing rod facing the central axis of the first fixing ring, and the first limiting plate is located in the first slot.

[0015] In one embodiment, the top block has an arc-shaped surface at one end facing the central axis of the first fixing ring. The arc-shaped surface and the surface of the mounting cavity are located within the same curved surface contour. The other end of the top block has a third slot. The first limiting plate and the second fixing rod are both movably engaged in the third slot. The end of the top block with the third slot also has a second limiting plate.

[0016] In one embodiment, a first fixing rod is provided through the middle of the chain link. The first fixing rod is fixed to the chain link by two fastening bolts. A first connector and a second connector are rotatably installed between the two first fixing plates and the second fixing plate. The first connector and the second connector can rotate toward each other. One end of the first connector and the second connector are movably sleeved on the first fixing rod.

[0017] In one embodiment, the first fixing plate has a first mounting hole, and the second fixing plate has a second mounting hole. The first connecting member includes a first mounting rod, a third fixing tube, a first arc-shaped plate, a first connecting plate, a third fixing rod, a second connecting plate, and a first limiting spring. The first mounting rod is rotatably installed in a set of coaxially arranged first and second mounting holes. Two third fixing tubes are provided and respectively sleeved on both ends of the first mounting rod. Two first arc-shaped plates are provided and respectively fitted onto the side of the first fixing rod away from the first mounting rod. The third fixing tube and the first arc-shaped plate are connected by two symmetrically arranged first connecting plates. A third fixing rod is provided on the third fixing tube, and a first limiting spring is sleeved on the third fixing rod. The end of the first limiting spring facing the first fixing rod is connected to the second connecting plate.

[0018] In one embodiment, the second connector includes a second mounting rod, a fourth fixing tube, a second arc-shaped plate, a third connecting plate, a fourth fixing rod, a fourth connecting plate, and a second limiting spring. The second mounting rod is rotatably mounted in another set of coaxially arranged first mounting holes and second mounting holes. Two fourth fixing tubes are provided and respectively sleeved on both ends of the second mounting rod. Two second arc-shaped plates are provided and respectively fitted onto the side of the first fixing rod away from the second mounting rod. The fourth fixing tube and the second arc-shaped plate are connected by two symmetrically arranged third connecting plates. A fourth fixing rod is provided on the fourth fixing tube, and a second limiting spring is sleeved on the fourth fixing rod. The end of the second limiting spring facing the first fixing rod is connected to the fourth connecting plate.

[0019] The present invention also provides a method for operating an incrementally expanding self-feeding central tool magazine, applied to the incrementally expanding self-feeding central tool magazine described in any of the above embodiments, the method comprising:

[0020] Before changing the tool, activate the chain tool magazine and drive the chain to move the mounting base containing the required tool to the tool changing position;

[0021] Subsequently, a structure or substance for reducing friction is added to the mounting cavity between the first positioning tube and the second positioning tube. Then, the knob is turned to cover the opening, at which point the inner surface of the knob protrudes and fills the opening.

[0022] During tool changing, the mounting base containing the required tool rotates on the mounting frame to align the tool with the tool changing mechanism for subsequent tool changes.

[0023] The aforementioned incremental expansion self-contained central tool magazine and its operating method involve activating the chain tool magazine and driving the chain before tool changing, thereby moving the fixed seat loaded with the required tool to the tool changing position. Then, a structure or substance to reduce friction is added to the mounting cavity between the first and second positioning tubes. The knob is then turned to cover the opening, at which point the inner surface of the knob protrudes and fills the opening. This rotating connection between the first and second positioning tubes prevents vertical swaying of the chain during operation, reduces chain wear during transmission, and improves the chain's transmission stability and tool positioning accuracy. Furthermore, since the lubricant and lubricant inside the mounting cavity can be removably filled, and the opening of the mounting cavity can be opened and closed by rotating the knob, subsequent maintenance and replacement of the lubricant or lubricant are more convenient. During tool changing, the fixed seat loaded with the required tool rotates on the fixed frame to align the tool with the tool changing mechanism for subsequent tool changing. Attached Figure Description

[0024] 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.

[0025] Figure 1 A three-dimensional structural diagram of the central tool magazine provided by the present invention;

[0026] Figure 2 This is one of the partial structural schematic diagrams of the chain-type tool magazine provided by the present invention;

[0027] Figure 3 This is a second partial structural schematic diagram of the chain-type tool magazine provided by the present invention;

[0028] Figure 4 Schematic diagram of the structure of the first fixing pipe and the second positioning pipe provided by the present invention;

[0029] Figure 5 A schematic diagram of the disassembled structure of the knob component provided by the present invention;

[0030] Figure 6 A schematic diagram of the structure of the first connector provided by the present invention;

[0031] Figure 7 This is a schematic diagram of the structure of the second connector provided by the present invention.

[0032] Figure label:

[0033] 100. Machine tool; 200. Chain-type tool magazine; 210. Fixing frame; 220. Fixing base; 230. Enclosure; 240. Operating space; 250. First fixing rod; 260. Fastening bolt; 300. Three-coordinate adjustment component; 400. Tool changing mechanism; 510. First positioning tube; 511. First fixing plate; 512. First fixing tube; 513. First mounting hole; 520. Second positioning tube; 521. Second fixing plate; 522. Second fixing tube; 523. Second mounting hole; 524. Opening; 530. Mounting cavity; 600. Pin; 700. Knob; 711. First fixing ring; 712. Second fixing ring; 713. Second fixing rod; 71 4. First limiting plate; 715. First slot; 716. Second slot; 721. Top block; 722. Second limiting plate; 723. Third slot; 724. Arc-shaped surface; 730. Return spring; 810. First connecting piece; 811. First mounting rod; 812. Third fixing tube; 813. First arc-shaped plate; 814. First connecting plate; 815. Third fixing rod; 816. Second connecting plate; 817. First limiting spring; 820. Second connecting piece; 821. Second mounting rod; 822. Fourth fixing tube; 823. Second arc-shaped plate; 824. Third connecting plate; 825. Fourth fixing rod; 826. Fourth connecting plate; 827. Second limiting spring. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] The following is combined Figures 1 to 7 This invention describes an incrementally expanding self-feeding central tool magazine and its operating method.

[0036] like Figures 1 to 3As shown, in one embodiment, an incrementally expandable self-contained central tool magazine includes a chain tool magazine 200, a fixing frame 210, a first fixing tube 512, a second fixing tube 522, and a knob 700. The chain tool magazine 200 is arranged in a spiral pattern on a plane, thereby increasing the length and capacity of the chain tool magazine 200. The fixing frame 210 is located around the chain of the chain tool magazine 200 and directly opposite the chain links. The fixing frame 210 is used to set the fixing seat 220 for loading tools. The first positioning tube 510 is fixed to one side of the back of the fixing frame 210, and the second positioning tube 522 is fixed to the other side of the back of the fixing frame 210. One fixing frame 210... The first positioning tube 510 on the back of the 10 is rotatably connected to the second positioning tube 520 on the back of the adjacent fixing bracket 210; an installation cavity 530 is provided at the contact point between the first positioning tube 510 and the second positioning tube 520, and the installation cavity 530 is used to add a structure or substance that reduces friction. An opening 524 is opened at one end of the first positioning tube 510 that is in contact with the second positioning tube 520, and the structure or substance that reduces friction is added to the installation cavity 530 through the opening 524; a knob 700 is rotatably mounted on the second positioning tube 520, and when the knob 700 is rotated to cover the opening 524, the inner surface of the knob 700 protrudes and fills the opening 524.

[0037] The aforementioned incremental expansion self-contained central tool magazine, before tool changing, activates the chain tool magazine 200 and drives the chain to move the fixed base 220 containing the required tool to the tool changing position. Then, a structure or material to reduce friction is added to the mounting cavity 530 between the first positioning tube 510 and the second positioning tube 520. Next, the knob 700 is turned to cover the opening 524. At this time, the inner surface of the knob 700 protrudes and fills the opening 524. This rotating connection structure of the first positioning tube 510 and the second positioning tube 520 avoids… The vertical swaying of the chain during operation reduces chain wear during transmission, improves the transmission stability of the chain and the positioning accuracy of the tool. At the same time, since the lubricating components and lubricant inside the mounting cavity 530 can be removably filled, and the opening 524 of the mounting cavity 530 can be opened and closed by rotating the knob 700, it is more convenient to perform subsequent maintenance and replace the filling lubricating components or lubricant. When changing the tool, the fixed seat 220 carrying the required tool rotates on the fixed frame 210 so that the tool is facing the tool changing mechanism 400 for subsequent tool changing.

[0038] In one embodiment, the chain tool magazine 200 is fixed on a plane on one side of the machine tool 100, and a three-axis adjustment component 300 is provided on the other side of the machine tool 100. The adjustment end of the three-axis adjustment component 300 is equipped with a tool changing mechanism 400 for changing the tools in the chain tool magazine 200.

[0039] Specifically, due to the limited space on the side of the machine tool 100, in order to achieve incremental expansion of the tool magazine, the chain tool magazine 200 can be set to rotate, thereby making full use of the limited space on the side of the machine tool 100. When changing tools, the three-axis adjustment component 300 is activated, driving the tool changing mechanism 400 to move to one side of the chain tool magazine 200. The chain tool magazine 200 is surrounded by a surrounding plate 230, while the tool changing position is left empty, forming an operating space 240. When changing tools, the tool changing mechanism 400 moves to the operating space 240 to retrieve and change the tool.

[0040] like Figure 4 As shown, in one embodiment, the first positioning tube 510 includes a first fixing plate 511 and a first fixing tube 512. Two first fixing plates 511 are provided on the back of the fixing frame 210. The first fixing tube 512 is fixed to one side of the first fixing plate 511. The second positioning tube 520 includes a second fixing plate 521 and a second fixing tube 522. The second fixing plate 521 is provided on the back of the fixing frame 210 and is located between the two first fixing plates 511. The second fixing tube 522 is located on the other side of the second fixing plate 521. The first fixing tube 512 and the second fixing tube 522, which are coaxially arranged, are rotatably connected by a pin 600.

[0041] Specifically, the first fixing tube 512 is located at the corner of one side of the first fixing plate 511, and the second fixing tube 522 is located at the corner of the other side of the second fixing plate 521. The distance between the first fixing tube 512 and the fixing bracket 210 is equal to the distance between the second fixing tube 522 and the fixing bracket 210. When installing two adjacent fixing brackets 210, the second fixing tube 522 on one fixing bracket 210 is inserted between the two first fixing tubes 512 on the other fixing bracket 210. Then, the pin 600 is inserted into the two first fixing tubes 512 and the second fixing tube 522 to complete the rotational connection between the two.

[0042] like Figure 5 As shown, in one embodiment, the knob 700 includes an annular limiting member, a top block 721, and a return spring 730. The inner surface of the annular limiting member is provided with a first groove 715 arranged in an annular structure. The annular limiting member is threaded onto the first fixed tube 512. Multiple top blocks 721 are arranged in an annular array, and the bottom ends of the multiple top blocks 721 are located inside the annular limiting member and are elastically connected to the central axis of the annular limiting member by multiple return springs 730.

[0043] Specifically, under normal conditions, the knob 700 is threaded onto the first fixed tube 512. At this time, the ends of multiple top blocks 721 abut against the outer surface of the first fixed tube 512. After the lubricating structure or substance is filled into the mounting cavity 530 through the opening 524, the opening 524 needs to be closed. At this time, the knob 700 can be rotated so that one end of the knob 700 covers the outer surface of the second fixed tube 522 until the multiple top blocks 721 facing the opening 524 are inserted into the opening 524 by the influence of the return spring 730 to close the opening 524.

[0044] In one embodiment, the annular limiting member includes a first fixing ring 711, a second fixing ring 712, a second fixing rod 713, and a first limiting plate 714. Two first fixing rings 711 are coaxially arranged, and the interval between the two first fixing rings 711 forms a first slot 715. The second fixing ring 712 has an arc-shaped cross-section, and its two ends are respectively connected to the outer surface of the other first fixing ring 711. A second slot 716 is formed on the surface of the second fixing ring 712, which divides the second fixing ring 712 into multiple unconnected parts. Multiple second fixing rods 713 are arranged in a ring array, with one end fixed to the inner surface of the second fixing ring 712 and the other end facing the central axis of the first fixing ring 711. Multiple first limiting plates 714 are provided, and each is fixed to one end of the second fixing rod 713 facing the central axis of the first fixing ring 711. The first limiting plate 714 is located in the first slot 715.

[0045] Specifically, the top block 721 has an arc-shaped surface 724 at one end facing the central axis of the first fixing ring 711. The arc-shaped surface 724 and the surface of the mounting cavity 530 are located within the same curved surface contour. The other end of the top block 721 has a third slot 723. The first limiting plate 714 and the second fixing rod 713 are both movably engaged in the third slot 723. The end of the top block 721 with the third slot 723 also has a second limiting plate 722.

[0046] In one embodiment, a first fixing rod 250 is provided through the middle of the chain link. The first fixing rod 250 is fixed to the chain link by two fastening bolts 260. A first connector 810 and a second connector 820 are rotatably installed between the two first fixing plates 511 and a second fixing plate 521. The first connector 810 and the second connector 820 can rotate toward each other. One end of the first connector 810 and the second connector 820 are movably sleeved on the first fixing rod 250.

[0047] Specifically, when the fixed frame 210 moves to the bending position within the chain-type tool magazine 200, the distance between the fixed frame 210 at the bending position and the chain link will change due to the mutual rotation and connection of adjacent fixed frames 210. At this time, the ends of the first connecting piece 810 and the second connecting piece 820 that are sleeved on the first fixed rod 250 will move along the first fixed rod 250, thereby forming a cross structure and providing redundant space for the fixed frame 210.

[0048] like Figure 6 and Figure 7 As shown, in one embodiment, a first mounting hole 513 is provided on the first fixing plate 511, and a second mounting hole 523 is provided on the second fixing plate 521. The first connecting member 810 includes a first mounting rod 811, a third fixing tube 812, a first arc-shaped plate 813, a first connecting plate 814, a third fixing rod 815, a second connecting plate 816, and a first limiting spring 817. The first mounting rod 811 is rotatably installed in a set of coaxially arranged first mounting holes 513 and second mounting holes 523. The third fixing tube 812 is provided with two... Two first arc-shaped plates 813 are respectively fitted onto the two ends of the first mounting rod 811. Two first arc-shaped plates 813 are respectively fitted onto the side of the first fixing rod 250 away from the first mounting rod 811. The third fixing tube 812 and the first arc-shaped plates 813 are connected by two symmetrically arranged first connecting plates 814. The third fixing tube 812 is provided with a third fixing rod 815. A first limiting spring 817 is fitted onto the third fixing rod 815. The end of the first limiting spring 817 facing the first fixing rod 250 is connected to a second connecting plate 816. The second connector 820 includes a second mounting rod 821, a fourth fixing tube 822, a second arc-shaped plate 823, a third connecting plate 824, a fourth fixing rod 825, a fourth connecting plate 826, and a second limiting spring 827. The second mounting rod 821 is rotatably installed in another set of coaxially arranged first mounting holes 513 and second mounting holes 523. There are two fourth fixing tubes 822, which are respectively sleeved on both ends of the second mounting rod 821. There are two second arc-shaped plates 823, which are respectively attached to the side of the first fixing rod 250 away from the second mounting rod 821. The fourth fixing tube 822 and the second arc-shaped plate 823 are connected by two symmetrically arranged third connecting plates 824. The fourth fixing tube 822 is provided with a fourth fixing rod 825, and the fourth fixing rod 825 is sleeved with a second limiting spring 827. The end of the second limiting spring 827 facing the first fixing rod 250 is connected to the fourth connecting plate 826.

[0049] In one embodiment, a method for operating an incrementally expanding self-feeding central tool magazine, applied to any of the above embodiments of the incrementally expanding self-feeding central tool magazine, includes the following steps:

[0050] Before changing tools, activate the chain tool magazine and drive the chain to move the mounting base containing the required tools to the tool changing position.

[0051] Subsequently, a structure or substance for reducing friction is added to the mounting cavity between the first positioning tube and the second positioning tube. Then, the knob is turned to cover the opening, at which point the inner surface of the knob protrudes and fills the opening.

[0052] During tool changing, the mounting base containing the required tool rotates on the mounting frame to align the tool with the tool changing mechanism for subsequent tool changes.

[0053] The above-described incremental expansion self-contained central tool magazine operation method involves activating the chain tool magazine and driving the chain before tool changing, thereby moving the fixed seat loaded with the required tool to the tool changing position. Then, a structure or substance to reduce friction is added to the mounting cavity between the first and second positioning tubes. Next, the knob is turned to cover the opening, at which point the inner surface of the knob protrudes and fills the opening. This rotating connection between the first and second positioning tubes prevents vertical swaying during chain operation, reduces chain wear during transmission, and improves chain transmission stability and tool positioning accuracy. Furthermore, since the lubricating components and lubricant inside the mounting cavity can be removably filled, and the opening of the mounting cavity can be opened and closed by rotating the knob, subsequent maintenance and replacement of the filling lubricating components or lubricant are more convenient. During tool changing, the fixed seat loaded with the required tool rotates on the fixed frame to align the tool with the tool changing mechanism for subsequent tool changing.

[0054] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0055] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. An incrementally expandable self-feeding central tool magazine, characterized in that, include: The chain-type tool magazine is arranged in a spiral pattern on a plane, thereby increasing the length and capacity of the chain-type tool magazine; A fixing frame is located around the chain of the chain-type tool magazine and directly opposite the chain links. The fixing frame is used to set a fixing seat for loading the tool. A first positioning tube and a second positioning tube, wherein the first positioning tube is fixed to one side of the back of the fixing frame and the second positioning tube is fixed to the other side of the back of the fixing frame, and the first positioning tube on the back of one fixing frame is rotatably connected to the second positioning tube on the back of an adjacent fixing frame. A mounting cavity is provided at the joint between the first positioning tube and the second positioning tube. The mounting cavity is used to add a structure or substance that reduces friction. An opening is provided at one end of the first positioning tube that is attached to the second positioning tube. The structure or substance that reduces friction is added to the mounting cavity through the opening. A knob is rotatably mounted on the second positioning tube, and when the knob is rotated to cover the opening, the inner surface of the knob protrudes and fills the opening; The chain tool magazine is fixed on a plane on one side of the machine tool, and a three-axis adjustment component is provided on the other side of the machine tool. The adjustment end of the three-axis adjustment component is equipped with a tool changing mechanism for changing the tools in the chain tool magazine. The first positioning tube includes a first fixing plate and a first fixing tube. Two first fixing plates are provided on the back of the fixing frame. The first fixing tube is fixed on one side of the first fixing plate. The second positioning tube includes a second fixing plate and a second fixing tube. The second fixing plate is provided on the back of the fixing frame and is located between the two first fixing plates. The second fixing tube is located on the other side of the second fixing plate. The first fixing tube and the second fixing tube, which are coaxially arranged, are rotatably connected by a pin. The knob includes an annular limiting member, a top block, and a return spring. The inner surface of the annular limiting member has a first groove arranged in an annular structure. The annular limiting member is threaded onto the first fixed pipe. Multiple top blocks are arranged in an annular array, and the bottom ends of the multiple top blocks are located inside the annular limiting member and are elastically connected to the central axis of the annular limiting member through multiple return springs.

2. The incrementally expanding self-feeding central tool magazine according to claim 1, characterized in that, The annular limiting component includes a first fixing ring, a second fixing ring, a second fixing rod, and a first limiting plate. Two first fixing rings are coaxially arranged, and the gap between the two first fixing rings forms the first slot. The second fixing ring has an arc-shaped cross-section, and its two ends are respectively connected to the outer surface of another first fixing ring. Multiple second fixing rods are arranged in a circular array, with one end fixed to the inner surface of the second fixing ring and the other end facing the central axis of the first fixing ring. Multiple first limiting plates are provided, and each is fixed to one end of the second fixing rod facing the central axis of the first fixing ring, and the first limiting plate is located in the first slot.

3. The incremental expansion self-feeding central tool magazine according to claim 2, characterized in that, The top block has an arc-shaped surface at one end facing the central axis of the first fixing ring. The arc-shaped surface and the surface of the mounting cavity are located within the same curved surface contour. The other end of the top block has a third slot. The first limiting plate and the second fixing rod are both movably engaged in the third slot. The top block also has a second limiting plate at the end with the third slot.

4. The incremental expansion self-feeding central tool magazine according to claim 3, characterized in that, A first fixing rod is provided through the middle of the chain link. The first fixing rod is fixed to the chain link by two fastening bolts. A first connecting piece and a second connecting piece are rotatably installed between the two first fixing plates and the second fixing plate. The first connecting piece and the second connecting piece can rotate toward each other. One end of the first connecting piece and the second connecting piece are movably sleeved on the first fixing rod.

5. The incremental expansion self-feeding central tool magazine according to claim 4, characterized in that, The first fixing plate has a first mounting hole, and the second fixing plate has a second mounting hole. The first connecting member includes a first mounting rod, a third fixing tube, a first arc plate, a first connecting plate, a third fixing rod, a second connecting plate, and a first limiting spring. The first mounting rod is rotatably installed in a set of coaxially arranged first and second mounting holes. There are two third fixing tubes, which are respectively sleeved on both ends of the first mounting rod. There are two first arc plates, which are respectively attached to the side of the first fixing rod away from the first mounting rod. The third fixing tube and the first arc plate are connected by two symmetrically arranged first connecting plates. A third fixing rod is provided on the third fixing tube, and a first limiting spring is sleeved on the third fixing rod. The end of the first limiting spring facing the first fixing rod is connected to the second connecting plate.

6. The incrementally expanding self-feeding central tool magazine according to claim 5, characterized in that, The second connector includes a second mounting rod, a fourth fixing tube, a second arc-shaped plate, a third connecting plate, a fourth fixing rod, a fourth connecting plate, and a second limiting spring. The second mounting rod is rotatably installed in another set of coaxially arranged first and second mounting holes. Two fourth fixing tubes are provided and respectively sleeved on both ends of the second mounting rod. Two second arc-shaped plates are provided and respectively fitted onto the side of the first fixing rod away from the second mounting rod. The fourth fixing tube and the second arc-shaped plate are connected by two symmetrically arranged third connecting plates. A fourth fixing rod is provided on the fourth fixing tube, and a second limiting spring is sleeved on the fourth fixing rod. The end of the second limiting spring facing the first fixing rod is connected to the fourth connecting plate.

7. A method for operating an incrementally expanding self-feeding central tool magazine, applied to the incrementally expanding self-feeding central tool magazine described in any one of claims 1 to 6, characterized in that, The method includes: Before changing the tool, activate the chain tool magazine and drive the chain to move the mounting base containing the required tool to the tool changing position; Subsequently, a structure or substance for reducing friction is added to the mounting cavity between the first positioning tube and the second positioning tube. Then, the knob is turned to cover the opening, at which point the inner surface of the knob protrudes and fills the opening. During tool changing, the mounting base containing the required tool rotates on the mounting frame to align the tool with the tool changing mechanism for subsequent tool changes.

Images