Tool changer and machining tool

Abstract

The application provides a machine tool tool changing device for replacing a tool on a tool holder, the tool holder comprising a mounting hole for mounting the tool, the machine tool tool changing device comprising at least one locking unit and a driving unit, the tool holder further comprising a mounting groove in communication with the mounting hole; the locking unit comprising a locking piece and a reset elastic piece, the locking piece being slidingly arranged in the mounting groove; the reset elastic piece being arranged on the locking piece and elastically abutting against the locking piece and the mounting groove; the driving unit being connected to the locking piece; the driving unit driving the locking piece to slide along the mounting groove and compress the reset elastic piece, the locking piece sliding into the mounting hole and locking the tool. The machine tool tool changing device of the application fixes and replaces the tool through the locking unit and the driving unit, avoids replacing the tool by manually screwing a bolt, eliminates the occurrence of the situation that the bolt fastening effect is poor, is safer, and saves manpower and material resources.

Description

Technical Field

[0001] This application relates to the field of machine tool processing, and in particular to a machine tool changing device with rapid tool changing capability. Background Technology

[0002] Mill-turn lathes are the fastest-growing and most widely used CNC lathes in the composite machining category. Most existing mill-turn lathes are equipped with tool holders and milling cutter posts to meet the needs of mill-turn operations. However, with traditional tool holders, when the cutting tool is damaged or a different type of cutting tool is needed, the fixing bolts need to be loosened manually for replacement, which is time-consuming, labor-intensive, and affects work efficiency. Summary of the Invention

[0003] To address the aforementioned technical problems, this application provides a machine tool tool changing device that enables rapid tool replacement. This solves the problem of efficiency issues caused by manually loosening the fixing bolts when tool replacement is required, and avoids potential safety issues arising from manual tool replacement.

[0004] One technical solution proposed in this application is: a machine tool tool changer for changing tools on a tool holder, the tool holder including a mounting hole for mounting the tool, wherein the machine tool tool changer includes at least one locking unit and a drive unit; the tool holder is also provided with a mounting groove, and the mounting groove extends to communicate with the mounting hole. The locking unit includes a locking member and a reset elastic member, the locking member being slidably disposed in the mounting groove; the reset elastic member being disposed on the locking member, and the reset elastic member elastically abutting against the locking member and the mounting groove; the drive unit is connected to the locking member; the drive unit drives the locking member to slide along the mounting groove and compress the reset elastic member, and the locking member slides to extend into the mounting hole to lock the tool.

[0005] Specifically, the machine tool tool changing device further includes a limiting unit, wherein the limiting unit includes a limiting rod and a limiting latch; the driving unit moves to be able to connect with the limiting rod, and the limiting rod is provided with a limiting hole; the limiting latch is slidably installed on the tool holder or the driving unit, and can slide to be engaged with or disengaged from the limiting hole.

[0006] Specifically, the driving unit includes a movable plate pivotally mounted on the tool holder, the movable plate having a through hole; a limiting rod mounted on the tool holder, wherein the movable plate can rotate to push or release the locking member, and simultaneously cause the through hole to engage or disengage from the limiting rod; a limiting tenon is slidably mounted on the movable plate, the limiting tenon being slidable to engage with or disengage from the limiting hole.

[0007] Specifically, the limiting tenon is wedge-shaped and includes an inclined surface that abuts against the limiting hole.

[0008] Specifically, the limiting unit further includes a movable seat, which is slidably mounted on the movable plate; the limiting tenon is fixed on the side wall of the movable seat facing the through hole; the movable seat slides along the movable plate, causing the limiting tenon to slide along the movable plate until it is engaged with or disengaged from the limiting hole.

[0009] Specifically, the limiting unit further includes an operating rod, one end of which is pivotally connected to the movable plate; the movable seat is provided with a sliding mounting groove, the operating rod is provided with an annular groove, a support shaft is provided in the annular groove, and the support shaft is connected in the annular groove; when the operating rod pivots, the support shaft abuts against the annular groove and pushes the movable seat to slide, and the support shaft slides relative to the annular groove.

[0010] Specifically, a push block is provided on the bottom surface of the movable plate facing the tool holder, and the push block abuts against the locking member when the movable plate pivots toward the tool holder.

[0011] Specifically, the inner wall of the mounting groove also includes a recessed area, and the two ends of the recessed area are formed with stepped surfaces; the locking member is also provided with a limiting ring, the reset elastic member and the limiting ring are housed in the mounting groove, and the reset elastic member elastically abuts against the limiting ring and the stepped surface.

[0012] A machining tool is proposed, comprising a machine tool body and a tool holder, the tool holder being fixed on the machine tool body, wherein the machining tool further comprises a machine tool changing device as described in any of the preceding claims.

[0013] Specifically, the tool holder includes a tool holder body and a trapezoidal mounting block and a positioning block fixedly connected to the tool holder body; the trapezoidal mounting block and the positioning block are respectively disposed on opposite sides of the tool holder body; the driving unit and the locking unit are both disposed on the trapezoidal mounting block, and the mounting hole is disposed on the tool holder body; the tool holder body and the positioning block are fixed on the machine tool body.

[0014] The beneficial effects of this application are as follows: Compared with existing machine tool tool changing devices, the machine tool tool changing device proposed in this application, and the machine tool including any of the above-mentioned machine tool tool changing devices, are used to change the tools on the tool holder. The tool holder includes a mounting hole for installing the tool, and also includes at least one locking unit and a drive unit. Therefore, when a tool change is required, the drive unit drives the locking unit to complete the tool change. This avoids the need to manually tighten bolts to change the tool, thus avoiding the waste of manpower and resources. Because manual tightening of bolts is no longer required, there is no possibility of poor bolt tightening, and it also provides a certain degree of safety. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0016] Figure 1 This is a schematic diagram of the structure of an embodiment of a machine tool tool changing device provided in this application;

[0017] Figure 2 yes Figure 1 A schematic diagram of the structure when the tool is fixed in the embodiment;

[0018] Figure 3 yes Figure 1 A schematic diagram of the locking unit when the tool is fixed in the embodiment;

[0019] Figure 4 yes Figure 1 A schematic diagram of the structure from another perspective when the tool is fixed in the embodiment. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0021] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0022] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0023] Reference Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of an embodiment of a machine tool tool changing device provided in this application. Figure 2 yes Figure 1 A schematic diagram of the structure when the tool is fixed in the embodiment. One aspect of this application provides a machine tool tool changing device for changing the tool on the tool holder 1. In this embodiment, the tool holder 1 includes a mounting hole 4 for mounting the tool, and the machine tool tool changing device includes at least one locking unit and a driving unit.

[0024] Specifically, the tool holder 1 is also provided with a mounting groove 12, which extends to communicate with the mounting hole 4; the locking unit includes a locking member 5 and a reset elastic member 52, the locking member 5 being slidably disposed within the mounting groove 12. The reset elastic member 52 is disposed on the locking member 5, and the reset elastic member 52 elastically abuts against the locking member 5 and the mounting groove 12. The driving unit is connected to the locking member 5, and the driving unit drives the locking member 5 to slide along the mounting groove 12 and compress the reset elastic member 52, and the locking member 5 slides until it extends into the mounting hole 4 to lock the tool.

[0025] Therefore, the machine tool tool changing device provided in this application uses a locking unit and an elastic element for fixing instead of bolts. Thus, when a tool change is needed, the elastic element, due to its reaction force, releases the locking unit from restricting the tool. This avoids the need to manually tighten bolts to change the tool, preventing waste of manpower and resources. Because manual tightening of bolts is no longer required, issues with poor bolt tightening are avoided, and the device also offers greater safety.

[0026] Understandably, in a specific embodiment, the drive unit can be a motor structure. In this case, since the motor structure has automatic positioning and control functions, the machine tool tool changing device does not need a corresponding limiting structure in terms of structure. The motor structure can directly control the corresponding drive unit to move and be fixed in the required position accordingly.

[0027] Understandably, in another specific embodiment, when the drive unit is not a motor structure, the drive unit needs a corresponding limiting structure that corresponds one-to-one with the locking unit to lock the tool and keep the tool in a fixed position.

[0028] Furthermore, in a specific embodiment, a snap-fit ​​structure (not shown) may be provided in the mounting groove 12. The drive unit drives the locking member 5 to slide along the mounting groove 12 to press the cutting tool and engage with the corresponding snap-fit ​​structure (not shown), thereby further locking the cutting tool in the mounting hole 4.

[0029] Please continue to refer to Figure 1 and Figure 2 Specifically, the machine tool tool changing device includes a limiting unit, which comprises a limiting rod 8 and a limiting latch 91. The limiting rod 8 has a limiting hole 81, and the limiting latch 91 is slidably mounted on the tool holder 1 or the drive unit. The drive unit can move to connect with the limiting rod 8, and the limiting latch 91 can be operated to slide into or out of the limiting hole 81. When the limiting latch 91 is engaged in the limiting hole 81, the limiting latch 91 and the limiting rod 8 together restrict the movement of the drive unit to prevent the drive unit from moving and causing the locking member 5 to disengage from the locked tool, thus preventing the tool from being securely fixed and causing machining problems. When a tool change is required, the limiting latch 91 disengages from the limiting hole 81, thereby no longer restricting the movement of the drive unit. At this time, the reset elastic member 52 drives the locking member 5 to move out of the locked tool, thereby releasing the tool for tool replacement.

[0030] In one specific embodiment, the drive unit includes a movable plate 7 pivotally mounted on the tool holder 1, the movable plate 7 having a through hole 72. A limiting rod 8 is mounted on the tool holder 1, wherein the movable plate 7 can rotate to push or release the locking member 5, simultaneously causing the through hole 72 to engage or disengage from the limiting rod 8. A limiting tenon 91 is slidably mounted on the movable plate 7, and the limiting tenon 91 can slide to engage with or disengage from the limiting hole 81.

[0031] Specifically, when it is necessary to fix the tool in the mounting hole 4, the movable plate 7 rotates to a direction parallel to the tool holder 1. At this time, the limiting rod 8 passes through the through hole 72, and the limiting tenon 91 installed on the movable plate 7 slides into the limiting hole 81 and is locked in the limiting hole 81.

[0032] Understandably, the machine tool tool changing device also includes a support base 6, and a movable plate 7 is pivotally mounted on the support base 6, thereby allowing the movable plate 7 to be pivotally mounted on the tool holder 1 via the support base 6. When the tool needs to be changed, the rotating shaft on the support base 6 drives the movable plate 7 to rotate, realizing the opening and locking of the limiting structure.

[0033] Understandably, the cross-sectional area of ​​the through hole 72 should be larger than that of the limiting rod 8. A larger through hole 72 can ensure that after the movable plate 7 is pressed down to the position of the parallel tool holder 1, the limiting rod 8 passes through the through hole 72 without affecting the normal rotation of the movable plate 7.

[0034] Specifically, the limiting tenon 91 is wedge-shaped, and includes an inclined surface that abuts against the limiting hole 81. In other words, the top surface of the limiting tenon 91 facing the limiting hole 81 is an inclined surface.

[0035] Understandably, since the limiting tenon 91 is wedge-shaped, when it enters the limiting hole 81, the limiting tenon 91 enters from the lower side of the structure until the entire structure is locked in the limiting hole 81. This helps to reduce the resistance and friction of the limiting tenon 91 when it enters the limiting hole 81, thus achieving quick fixation of the tool.

[0036] Alternatively, in other embodiments, the limiting tenon 91 can also be a right-angled trapezoidal platform structure, in which case the bottom surface of the limiting tenon 91 is in complete contact with the movable plate 7. During movement, it rubs against the movable plate 7 and further applies downward pressure to the movable plate 7, thereby ensuring the tightness of the locking member 5 in restricting the tool.

[0037] Alternatively, in another embodiment, the limiting tenon 91 can also be an isosceles trapezoidal platform structure. In this case, the bottom surface of the limiting tenon 91 does not contact the movable plate 7. Therefore, the structure of the movable plate 7 can be well adapted, and the setting of the movable plate 7 is more flexible and convenient.

[0038] In one specific embodiment, the limiting unit further includes a movable seat 9, which is slidably mounted on the movable plate 7. A limiting latch 91 is fixed to the side wall of the movable seat 9 facing the through hole 72. The movable seat 9 slides along the movable plate 7, causing the limiting latch 91 to slide along the movable plate 7 until it engages with or disengages from the limiting hole 81.

[0039] For ease of operation, the limiting unit further includes an operating lever 10, which is connected to the movable seat 9, allowing the movable seat 9 to slide along the movable plate 7. More specifically, the first end of the operating lever 10 is pivotally connected to the movable plate 7 via a drive shaft 73; the operating lever 10 also includes a second end opposite to the first end, which is a free end for user operation. The movable seat 9 is provided with a sliding mounting groove 92, and a support shaft 93 is provided on the inner wall of the sliding mounting groove 92. An annular groove 101 is provided near the first end of the operating lever 10. The first end of the operating lever 10 passes through the sliding mounting groove 92 and is pivotally connected to the movable plate 7, with the support shaft 93 connected within the annular groove 101. When the second end of the operating lever 10 is operated, causing the operating lever 10 to pivot around the drive shaft 73, the support shaft 93 abuts against the annular groove 101, thereby pushing the movable seat 9 to slide, and the support shaft 93 slides relative to the annular groove 101.

[0040] Understandably, when the operating lever 10 is moved, it rotates in a circle around the drive shaft 73. The support shaft 93 in the sliding mounting groove 92 supports the operating lever 10, thereby driving the movable seat 9 to move linearly. After the movable seat 9 moves, it drives the end-fixed connecting limit latch 91 to insert into the limit hole 81. After the limit latch 91 is inserted into the limit hole 81, the slope at the top of the limit latch 91 drives the movable plate 7 to press down further during the movement of the movable seat 9, ensuring the tightness of the locking part 5 in restricting the tool.

[0041] Specifically, a push block 71 is provided on the bottom surface of the movable plate 7 facing the tool holder 1. When the movable plate 7 pivots toward the tool holder 1, the push block 71 abuts against the locking member 5. The push block 71 corresponds one-to-one with the locking member 5, and the arrangement of the push block 71 ensures that the locking member 5 is completely embedded in the mounting groove 12, avoiding the cutting tool in the mounting hole 4 from shaking during workpiece machining if the locking member 5 cannot be completely embedded in the mounting groove 12, thus preventing machining errors.

[0042] Please refer to Figure 3 , Figure 3 yes Figure 1The embodiment shows a schematic diagram of the locking unit when the tool is fixed. Specifically, the inner wall of the mounting groove 12 also includes a recessed area, with stepped surfaces formed at both ends of the recessed area. A limiting ring 51 is also protruding from the locking member 5. The reset elastic member 52 and the limiting ring 51 are housed in the mounting groove 12, with the reset elastic member 52 elastically abutting against the limiting ring 51 and the stepped surface. That is, the mounting groove 12 consists of a large-diameter cylindrical cavity in the middle and small-diameter cylindrical cavities at both ends, with stepped surfaces formed at the junctions of the small-diameter cylindrical cavities and the large-diameter cylindrical cavities, respectively. The reset elastic member 52 is disposed in the large-diameter cylindrical cavity in the middle and elastically abuts against the limiting ring 51 and any one of the stepped surfaces; the diameter of the small-diameter cylindrical cavities at both ends is larger than the diameter of the locking member 5, so that the locking member 5 can slide freely in the mounting groove 12. In use, the reset elastic member 52 can drive the locking member 5 to move vertically under the action of elastic force, which facilitates the replacement of the tool in the mounting hole 4.

[0043] Optionally, in other embodiments, a retractable latching device may also be provided on the inner wall of the mounting groove 12. It is understood that the latching device is fixed to both side walls of the mounting groove 12, and the upper end of the latching device is an inclined surface with a certain degree of inclination. When the locking member 5 moves downward and compresses the reset elastic member 52, the limiting ring 51 applies pressure to the inclined surface of the latching device, pushing the latching device into the both side walls of the mounting groove 12. When the limiting ring 51 has completely passed through the latching device, the latching device pops out from the both side walls of the mounting groove 12 due to the disappearance of the force, thus limiting the locking ring 51.

[0044] Another aspect of this application provides a machine tool, including a machine tool body and a tool holder 1, the tool holder 1 being fixed on the machine tool body, and the machine tool further including any of the aforementioned machine tool tool changing devices.

[0045] Specifically, please continue to refer to Figure 1 and Figure 2 The tool holder 1 is provided with an assembly hole 3, and the tool holder 1 can be fixedly installed on the machine tool body through the assembly hole 3.

[0046] Please refer to Figure 4 , Figure 4 yes Figure 1 A schematic diagram of the structure from another perspective when the tool is fixed in the embodiment. In a specific embodiment, the tool holder 1 includes a tool holder body and a trapezoidal mounting block 11 and a positioning block 2 fixedly connected to the tool holder body; the trapezoidal mounting block 11 and the positioning block 2 are respectively disposed on opposite sides of the tool holder body; the drive unit and the locking unit are both disposed on the trapezoidal mounting block 11, and the mounting hole 4 is disposed on the tool holder body; the tool holder body and the positioning block 2 are fixed on the machine tool body.

[0047] Understandably, the positioning block 2 has an L-shaped structure. The tool holder body is fixedly mounted on the machine tool through the mounting hole 3, and the positioning block 2 is embedded in the machine tool body to make the tool holder body more stable and reliable.

[0048] When changing tools, the tool changing device of this application moves the operating lever 10 to the right, causing the movable seat 9 to move closer to the support seat 6. The tool is then inserted into the mounting hole 4. After the tool is inserted into the appropriate position, the movable plate 7 is pressed to the position parallel to the tool holder body. The bottom sides of the movable plate 7 are provided with fixedly connected push blocks 71, which abut against one end of the locking member 5, thereby causing the locking member 5 to be inserted into the mounting hole 4. The end of the locking member 5 cooperates with the mounting hole 4 to clamp and fix the tool, preventing mechanical errors from occurring when the tool is not clamped during workpiece processing. Then, the operating lever 10 is moved, causing it to rotate in a circle around the drive shaft 73. The annular groove 101 on the operating lever 10, in conjunction with the support shaft 93 fixedly connected to the movable seat 9, moves the movable seat 9. After the movable seat 9 moves, the limiting latch 91 fixedly connected at the end is inserted into the limiting hole 81. After the limiting latch 91 is inserted into the limiting hole 81, the top slope of the limiting latch 91 causes the movable plate 7 to press down further during the movement of the movable seat 9, ensuring the tightness of the locking part 5 in restricting the tool. After the tool is clamped, the tool replacement is completed. This tool replacement method does not require manual loosening of the fixing bolts, avoiding the problem of poor bolt tightening and providing a certain degree of safety.

[0049] In the description of this application, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0050] The above are merely embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A machine tool tool changer for exchanging a tool on a tool holder, the tool holder comprising a mounting hole for mounting the tool, characterized in that: The machine tool tool changing device includes at least one locking unit and a drive unit; The tool holder is also provided with a mounting groove, and the mounting groove extends to communicate with the mounting hole; The locking unit includes a locking member and a reset elastic member. The locking member is slidably disposed in the mounting groove. The reset elastic member is disposed on the locking member and elastically abuts against the locking member and the mounting groove. The drive unit is connected to the locking member; the drive unit drives the locking member to slide along the mounting groove and compress the reset elastic member, and the locking member slides into the mounting hole to lock the tool; The machine tool tool changing device is characterized in that it further includes a limiting unit, wherein the limiting unit includes a limiting rod and a limiting latch; The driving unit can move to connect with the limiting rod, and the limiting rod is provided with a limiting hole; The limiting tenon is slidably mounted on the tool holder or the drive unit, and can slide to engage with or disengage from the limiting hole; The drive unit includes a movable plate pivotally mounted on the tool holder, and the movable plate is provided with a through hole; The limiting rod is disposed on the tool holder, wherein the movable plate can be rotated to push or release the locking member, and at the same time make the through hole snap or disengage from the limiting rod; The limiting tenon is slidably mounted on the movable plate, and the limiting tenon can slide to engage with or disengage from the limiting hole.

2. The machine tool changer according to claim 1, characterized in that The limiting tenon is wedge-shaped and includes an inclined surface that abuts against the limiting hole.

3. A machine tool tool changer according to claim 2, characterized in that The limiting unit also includes a movable seat, which is slidably mounted on the movable plate; The limiting tenon is fixed to the side wall of the movable seat facing the through hole; The movable seat slides along the movable plate, causing the limiting tenon to slide along the movable plate until it is engaged with or disengaged from the limiting hole.

4. A machine tool tool changer according to claim 3, characterized in that The limiting unit also includes an operating lever, one end of which is pivotally connected to the movable plate; The movable seat is provided with a sliding mounting groove, the inner wall of the sliding mounting groove is provided with a support shaft, the operating rod is provided with an annular sliding groove, and the support shaft is connected in the annular sliding groove; When the operating lever is pivoted, the support shaft abuts against the annular groove and pushes the movable seat to slide, and the support shaft slides relative to the annular groove.

5. The machine tool changer according to claim 1, characterized in that A push block is provided on the bottom surface of the movable plate facing the tool holder. When the movable plate pivots toward the tool holder, the push block abuts against the locking member.

6. A machine tool changer according to any one of claims 1-5, characterized in that, The inner wall of the mounting groove also includes a recessed area, and the two ends of the recessed area are formed with stepped surfaces; The locking member is further provided with a limiting ring. The reset elastic member and the limiting ring are housed in the mounting groove. The reset elastic member elastically abuts against the limiting ring and the stepped surface.

7. A machine tool comprising a machine body and a tool holder, the tool holder being fixed to the machine body, characterized in that The machine tool further includes a tool changing device as described in any one of claims 1-6.

8. The machine tool according to claim 7, characterized in that The tool holder includes a tool holder body and a trapezoidal mounting block and a positioning block fixedly connected to the tool holder body; The trapezoidal mounting block and the positioning block are respectively disposed on opposite sides of the tool holder body; The driving unit and the locking unit are arranged on the trapezoidal mounting block, and the mounting hole is arranged on the tool holder body. The tool holder body and the positioning block are fixed on the machine tool body.

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