A locking mechanism for preventing the loosening of a replaceable stepped milling cutter head

Abstract

The utility model relates to anti -loose tool bit locking mechanism technical field, especially for a kind of anti -loose tool bit locking mechanism of replaceable stepped cutter, including milling cutter body, the convex shaft outer wall in the middle of milling cutter body is provided with four clamping blocks around shaft center ninety degrees equidistance, and the right end port of milling cutter body is welded with six prism insert bar, the outer wall of the milling cutter body is sequentially provided with clamping assembly and connecting assembly from left to right, the outer wall of the fixed component is fixedly installed with telescopic link, and telescopic link is connected and communicates with energy accumulator by pipeline, the energy accumulator is connected and communicates with external hydraulic pump by telescopic hose, and hydraulic pump is connected with hydraulic cylinder by pipeline, the right side of the hydraulic cylinder is equipped with PLC controller. The device can be by clamping block of milling cutter body clamped into rotary disc, terminal six prism insert bar is inserted into six prism groove, hydraulic pump drives telescopic link jacking, drives connecting rod and clamping head to carry out multidirectional clamping to milling cutter body, enhance locking force, to improve processing quality.

Description

Technical Field

[0001] This utility model relates to the technical field of anti-loosening cutter head locking mechanism, specifically to an anti-loosening cutter head locking mechanism for a replaceable stepped milling cutter. Background Technology

[0002] An anti-loosening tool head locking mechanism is a specialized device used in machining equipment to quickly lock and reliably fix tools using a specific structure or mechanism, while allowing for quick release when necessary (such as during tool change). Its core function is to secure tools and prevent them from loosening during cutting due to vibration or impact. Stepped end mills are typically used for machining multi-step surfaces, requiring quick tool head changes to adapt to different processes. Traditional locking methods (such as ordinary bolts) are easily affected by vibration, leading to tool loosening. Therefore, a mechanism that can quickly lock / release and has an anti-loosening function is needed to shorten tool change time and ensure repeatability.

[0003] Chinese utility model patent CN208033762U discloses a milling cutter that is easy to install, including "a snap-fit ​​device fixedly connected to the middle of the top of the base plate, which makes it extremely easy and convenient to install and remove the milling cutter, greatly speeding up the installation and removal process and saving working time"; however, the anti-loosening locking structure is simple and is prone to loosening under high-frequency vibration, and the high-speed centrifugal force weakens the locking force, reducing the machining quality. If the cutter head flies off, it may cause a safety accident. Utility Model Content

[0004] The purpose of this invention is to provide a locking mechanism for the anti-loosening head of a replaceable stepped end mill, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a locking mechanism for the anti-loosening head of a replaceable stepped milling cutter, comprising a milling cutter body, wherein four locking blocks are equidistantly arranged around the axis at 90-degree intervals on the outer wall of the protruding shaft in the middle of the milling cutter body, and a hexagonal prism insert is welded to the right end port of the milling cutter body; a clamping assembly and a fixing assembly are arranged sequentially from left to right on the outer wall of the milling cutter body; a telescopic rod is fixedly installed on the outer wall of the fixing assembly, and the telescopic rod is connected to and communicates with an accumulator through a pipe; the accumulator is connected to and communicates with an external hydraulic pump through a telescopic hose, and the hydraulic pump is connected to a hydraulic cylinder through a pipe; a PLC controller is provided on the right side of the hydraulic cylinder.

[0006] The clamping assembly includes a rotating disk, which is snapped onto four snap-fit ​​blocks via slots. The rotating disk is connected to a baffle via bearings. Six T-shaped blocks are equidistantly arranged around the axis at 60-degree intervals on the right side of the outer wall of the rotating disk. Each of the six T-shaped blocks has a connecting rod movably sleeved on its outer wall, and a clamping head is provided at the end of the connecting rod away from the T-shaped block. A linkage rod is movably sleeved on the connecting rod via a fixed shaft, and a rotating shaft is provided on both the left and right sides of the end of the linkage rod away from the connecting rod. A fixed block is movably inserted into the rotating shaft, and the bottom of the fixed block is welded to the first rotating disk.

[0007] The beneficial effects of this utility model are as follows: This device can insert the milling cutter body locking block into the rotating disk, insert the hexagonal prism insert at the end into the hexagonal groove, and the PLC controller can adjust the power of the hydraulic pump through the displacement sensor to drive the telescopic rod to rise, thereby driving the connecting rod and the clamping head to clamp the milling cutter body. The T-block provides support and limit for the movement of the connecting rod. The connecting rod drives the first rotating disk to rotate on the rotating disk through the linkage rod, rotating shaft and fixing block, thereby driving the multiple connecting rods of the first rotating disk to clamp the milling cutter body in multiple directions, enhancing the locking force, preventing loosening and falling off, thereby improving the processing quality and reducing the probability of safety accidents.

[0008] To protect the connecting rod and clamping head during clamping and prevent waste chips and oil from entering during processing:

[0009] Further configuration: The fixing component includes a housing, the outer wall of which has holes whose inner wall size matches the outer wall size of the telescopic rod, and the housing is fixedly installed on the base of the telescopic rod through the holes. The outer wall of the housing has several holes equidistantly spaced at 120 degrees around the axis on the left side, and each hole is fitted with a Spires nut. The inner wall of the housing is movably mounted with a second rotating disk through a bearing, and the outer wall of the second rotating disk has six first protrusions equidistantly spaced at 60 degrees around the axis on the left side. The outer wall of the second rotating disk has a hexagonal groove at the axis on the left side, the inner wall size of which matches the outer wall size of the hexagonal prism insert, and the right side of the second rotating disk has a motor output terminal interface.

[0010] By adopting the above technical solution, the outer shell is fixedly connected to the baffle by screws and Spiral nuts, which encloses and protects the connecting rod and the clamping head. The hexagonal groove limits the hexagonal prism insert of the milling cutter body, preventing waste chips and oil from entering during the processing and reducing the maintenance frequency.

[0011] To enable multiple connecting rods on the first rotating disk to simultaneously clamp the milling cutter body in multiple directions:

[0012] The rotating disk is further configured such that the inner ring of the rotating disk has an annular groove on its outer wall that is the same size as the second protrusion on the outer wall of the first rotating disk, and the first rotating disk is rotated and engaged in the annular groove of the rotating disk by the second protrusion.

[0013] By adopting the above technical solution, the connecting rod drives the first rotating disk to rotate on the rotating disk through the linkage rod, rotating shaft and fixed block. The second protruding block on the outer wall of the first rotating disk moves in a ring along the annular groove of the rotating disk, thereby driving the multiple connecting rods of the first rotating disk to clamp the milling cutter body in multiple directions, further enhancing the locking force and preventing loosening and falling off.

[0014] To ensure a tight connection between the baffle and the outer casing, and to prevent them from loosening under high-frequency vibration:

[0015] The baffle is further configured such that: a groove corresponding to the size of the outer wall structure of the inner wall and the outer wall structure of the outer shell is provided on the right side of the outer wall, and a Spiral threaded slot is provided in the groove corresponding to the hole of the outer shell.

[0016] By adopting the above technical solution, the outer shell is inserted into the groove of the baffle, and the Spirax threaded slot on the baffle corresponds to the Spirax nut embedded in the hole of the outer shell. The outer shell and the baffle are fixed by the Spirax nut screw, so as to achieve a tight connection between the baffle and the outer shell, avoid the two from loosening under high frequency vibration, and reduce the frequency of maintenance of the clamped parts.

[0017] To achieve stable clamping of the milling cutter body by the clamping head under high-frequency vibration:

[0018] The clamping surface of the outer wall of the clamping head is provided with a textured anti-slip surface, and a displacement sensor is provided on the right side of the outer wall of the clamping head.

[0019] By adopting the above technical solution, the clamping surface of the clamping head is provided with a textured surface to prevent slipping. The PLC controller transmits data through the displacement sensor to adjust the power of the hydraulic pump, which drives the telescopic rod to rise, thereby driving the connecting rod and the clamping head to stably clamp the milling cutter body, enhancing the locking force and improving production safety and processing quality.

[0020] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the main view of this utility model;

[0022] Figure 2 This utility model Figure 1 Unfolding diagram;

[0023] Figure 3 This is a schematic diagram of the clamping component of this utility model;

[0024] Figure 4 This is a schematic diagram of the connection component of this utility model.

[0025] In the diagram: 1. Milling cutter body; 2. Clamping block; 3. Hexagonal prism insert; 4. Clamping assembly; 401. Rotary disk; 402. Baffle; 403. T-block; 404. Connecting rod; 405. Clamping head; 406. Linkage rod; 407. Rotating shaft; 408. Fixing block; 409. First rotating disk; 5. Fixing assembly; 501. Outer shell; 502. Second rotating disk; 503. First protrusion; 504. Hexagonal groove; 6. Telescopic rod; 7. Accumulator; 8. Hydraulic pump; 9. Hydraulic cylinder; 10. PLC controller. Detailed Implementation

[0026] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of the present invention in any way.

[0027] Please see Figures 1 to 4 A locking mechanism for a replaceable stepped end mill head includes an end mill body 1. Four locking blocks 2 are equidistantly arranged around the axis at a 90-degree angle on the outer wall of the protruding shaft in the middle of the end mill body 1. A hexagonal prism insert 3 is welded to the right end of the end mill body 1. The outer wall of the end mill body 1 is provided with a clamping component 4 and a fixing component 5 from left to right. A telescopic rod 6 is fixedly installed on the outer wall of the fixing component 5. The telescopic rod 6 is connected to an accumulator 7 through a pipe. The accumulator 7 is connected to an external hydraulic pump 8 through a telescopic hose. The hydraulic pump 8 is connected to a hydraulic cylinder 9 through a pipe. A PLC controller 10 is provided on the right side of the hydraulic cylinder 9.

[0028] The clamping assembly 4 includes a rotating disk 401, which is snapped onto four snap-fit ​​blocks 2 via slots. A baffle 402 is connected to the rotating disk 401 via bearings. Six T-shaped blocks 403 are equidistantly arranged around the axis at 60-degree intervals on the right side of the outer wall of the rotating disk 401. A connecting rod 404 is movably sleeved on the outer wall of each of the six T-shaped blocks 403. A clamping head 405 is provided at the end of the connecting rod 404 away from the T-shaped block 403. A linkage rod 406 is movably sleeved on the connecting rod 404 via a fixed shaft. Rotating shafts 407 are provided on both the left and right sides of the end of the linkage rod 406 away from the connecting rod 404. A fixed block 408 is movably inserted into the rotating shaft 407. The bottom of the fixed block 408 is welded to the first rotating disk 409.

[0029] In this embodiment, as Figure 1 , Figure 2 and Figure 4As shown, the fixing component 5 includes a housing 501. The outer wall of the housing 501 has holes whose inner wall size matches the outer wall size of the telescopic rod 6. The housing 501 is fixedly installed on the base of the telescopic rod 6 through the holes. The outer wall of the housing 501 has several holes equidistantly spaced around the axis at 120 degrees on the left side, and each hole is fitted with a Spires nut. The inner wall of the housing 501 is movably mounted with a second rotating disk 502 through a bearing. The outer wall of the second rotating disk 502 has six first protrusions 503 equidistantly spaced around the axis at 60 degrees on the left side. The outer wall of the second rotating disk 502 has a hexagonal groove 504 whose inner wall size matches the outer wall size of the hexagonal prism insert 3 at the axis on the left side. The right side of the second rotating disk 502 has a motor output terminal interface.

[0030] In this embodiment, as Figure 1 , Figure 2 and Figure 3 As shown, the inner ring outer wall of the rotating disk 401 is provided with an annular groove whose inner wall size is consistent with the size of the second protrusion on the outer wall of the first rotating disk 409. The first rotating disk 409 is rotated and engaged in the annular groove of the rotating disk 401 by the second protrusion.

[0031] In this embodiment, as Figure 2 , Figure 3 and Figure 4 As shown, the outer wall of the baffle 402 has a groove on the right side that corresponds to the size of the outer wall structure of the outer shell 501, and the groove has a Spiral threaded slot corresponding to the hole in the outer shell 501.

[0032] In this embodiment, as Figure 3 As shown, the clamping surface of the outer wall of the clamping head 405 is provided with a textured anti-slip surface, and a displacement sensor is provided on the right side of the outer wall of the clamping head 405.

[0033] The computer software involved in the hardware carriers such as the PLC controller 10 in the technical solution is software technology known to those skilled in the art. It is merely applied to the aforementioned hardware carriers. In other words, the computer software portion of the technical solution is an essential technical feature for solving the aforementioned technical problem, constituting a necessary technical feature for the technical problem solved by this application, but it is not a differentiating technical feature or a point of technical improvement. The applicant has not made any technical improvements to the computer software portion involved in the aforementioned related hardware carriers, nor is it a key technical point of the invention.

[0034] Therefore, the "PLC controller 10" and other components involved in this application are physical functional modules that combine existing computer software programs or protocols with the hardware carrier of this application. The computer software programs involved in these physical functional modules are technologies known to those skilled in the art and are not improvements of this application. The improvement of this application should be the interaction between the various physical functional modules, that is, the overall improvement of the anti-loosening tool head locking mechanism of the replaceable stepped end mill of this application, so as to solve the corresponding technical problems to be solved by this application.

[0035] The working process of the anti-loosening tool head locking mechanism of this replaceable stepped end mill is as follows:

[0036] First, the operator inserts four locking blocks 2 on the protruding shaft in the middle of the milling cutter body 1 into four grooves on the rotating disk 401. The hexagonal prism insert 3 on the milling cutter body 1 is then inserted into the hexagonal groove 504 on the second rotating disk 502. The four locking blocks 2 and the hexagonal groove 504 provide initial clamping and limiting to prevent lateral displacement during rotation. Then, the external hydraulic pump 8 and PLC controller 10 are activated. The hydraulic pump 8 pumps oil from the hydraulic cylinder 9 to the telescopic rod 6, causing the telescopic rod 6 to rise, thereby driving the connecting rod 404 and the clamping head 40... 5. The end mill body 1 is clamped. The textured surface of the clamping head 405 enhances the clamping friction. The groove on the connecting rod 404 moves along the T-block 403. The T-block 403 provides support and limits for the movement of the connecting rod 404. The connecting rod 404 drives the linkage rod 406 to rotate around the rotating shaft 407. The rotating shaft 407 is movably inserted into the fixed block 408. The connecting rod 404 and the linkage rod 406 work together to drive the first rotating disk 409 to rotate on the rotating disk 401, thereby driving the multiple connecting rods 404 on the first rotating disk 409. 4. The milling cutter body 1 is clamped in multiple directions. The PLC controller 10 adjusts the clamping force in real time based on the high-frequency vibration during operation and the displacement sensor on the clamping head 405 to detect the clamping loosening. The accumulator 7 is used to adjust the hydraulic stability of the output oil in the pipeline to further strengthen the clamping of the milling cutter body 1 and prevent loosening and longitudinal fall-off. The outer shell 501 and the baffle 402 are fixed by the Spiral nuts and screws to achieve a tight connection between the baffle 402 and the outer shell 501. The movement of the connecting rod 404 is controlled by the second rotating disk 502. At the notch between the six first protrusions 503, the right side of the second rotating disk 502 inside the outer casing 501 is provided with an external motor output interface. The right side of the outer casing 501 has a pre-set screw mounting hole for connecting an external motor or other object. The external motor drives the second rotating disk 502 to rotate inside the outer casing 501, thereby driving the rotating disk 401 to rotate on the baffle 402. The PLC controller 10 can also connect an external motor to keep the position of the clamping head 405 under the position of the telescopic rod 6 when the machine stops or starts, according to the displacement sensor on the clamping head 405.

[0037] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0038] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0039] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The above examples are only for the purpose of helping to understand the method and core ideas of this utility model. The above description is only a preferred embodiment of this utility model. It should be noted that due to the limitations of textual expression, there are objectively infinite specific structures. For those skilled in the art, several improvements, modifications, or changes can be made without departing from the principles of this utility model, and the above technical features can also be combined in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without modification, should all be considered within the protection scope of this utility model.

Claims

1. A locking mechanism for the anti-loosening head of a replaceable stepped end mill, characterized in that: The milling cutter body (1) includes four snap-fit ​​blocks (2) equidistantly arranged around the center of the outer wall of the protruding shaft in the middle of the milling cutter body (1) at ninety degrees. A hexagonal prism insert (3) is welded to the right end of the milling cutter body (1). The outer wall of the milling cutter body (1) is provided with a clamping assembly (4) and a fixing assembly (5) from left to right. A telescopic rod (6) is fixedly installed on the outer wall of the fixing assembly (5). The telescopic rod (6) is connected to and communicates with the accumulator (7) through a pipe. The accumulator (7) is connected to and communicates with the external hydraulic pump (8) through a telescopic hose. The hydraulic pump (8) is connected to the hydraulic cylinder (9) through a pipe. A PLC controller (10) is provided on the right side of the hydraulic cylinder (9). The clamping assembly (4) includes a rotating disk (401), which is clamped to four clamping blocks (2) by a slot. The rotating disk (401) is connected to a baffle (402) by a bearing. Six T-shaped blocks (403) are equidistantly arranged around the axis at sixty degrees on the right side of the outer wall of the rotating disk (401). A connecting rod (404) is movably sleeved on the outer wall of each of the six T-shaped blocks (403). A clamping head (405) is provided at the end of the connecting rod (404) away from the T-shaped block (403). A linkage rod (406) is movably sleeved on the connecting rod (404) through a fixed shaft. Rotating shafts (407) are provided on both the left and right sides of the end of the linkage rod (406) away from the connecting rod (404). A fixed block (408) is movably inserted into the rotating shaft (407). The bottom of the fixed block (408) is welded to the first rotating disk (409).

2. The anti-loosening tool head locking mechanism for a replaceable stepped end mill as described in claim 1, characterized in that: The fixing component (5) includes a housing (501). The outer wall of the housing (501) has holes whose inner wall size matches the outer wall size of the telescopic rod (6). The housing (501) is fixedly installed on the base of the telescopic rod (6) through the holes. The outer wall of the housing (501) has several holes equidistantly arranged around the axis at 120 degrees on the left side. The holes are fitted with Spitzer nuts. The inner wall of the housing (501) is movably mounted with a second rotating disk (502) through a bearing. The outer wall of the second rotating disk (502) has six first protrusions (503) equidistantly arranged around the axis at 60 degrees on the left side. The outer wall of the second rotating disk (502) has a hexagonal groove (504) whose inner wall size matches the outer wall size of the hexagonal prism insert (3) at the axis on the left side. The second rotating disk (502) has a motor output terminal interface on the right side.

3. The anti-loosening tool head locking mechanism for a replaceable stepped end mill as described in claim 1, characterized in that: The inner ring of the rotating disk (401) has an annular groove on its outer wall that is the same size as the second protrusion on the outer wall of the first rotating disk (409). The first rotating disk (409) is rotated and engaged in the annular groove of the rotating disk (401) by the second protrusion.

4. The anti-loosening tool head locking mechanism for a replaceable stepped end mill as described in claim 1, characterized in that: The outer wall of the baffle (402) has a groove on the right side that corresponds to the size of the outer wall structure of the outer shell (501), and the groove has a Spiral threaded slot corresponding to the hole of the outer shell (501).

5. The anti-loosening tool head locking mechanism for a replaceable stepped end mill as described in claim 1, characterized in that: The clamping surface of the outer wall of the clamping head (405) is provided with a textured anti-slip surface, and a displacement sensor is provided on the right side of the outer wall of the clamping head (405).

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