Multi-functional milling head structure of gantry numerical control machining center

Abstract

The utility model relates to gantry numerical control machining center related technical field especially, a kind of multifunctional milling head structure of gantry numerical control machining center, including milling head subassembly, the inside of assembly seat is provided with connecting mechanism.The multifunctional milling head structure of gantry numerical control machining center, through the setting of connecting mechanism, worker inserts milling head subassembly upper surface and its transmission shaft into assembly seat to complete preliminary combination, then by injecting hydraulic oil to first oil inlet pipe, then hydraulic oil flows into first passage by first oil passage, under pressure, first piston is moved, first piston drives first top bar to move to make first top bar end and ring groove closely cooperate, at the same time, external hydraulic oil system controls and injects hydraulic oil to second oil inlet pipe, then hydraulic oil flows into second passage by second oil passage, hydraulic oil is moved under certain pressure, and then drive second top bar to move, make second top bar insert into positioning groove, realize accurate positioning and firm fixation.

Description

Technical Field

[0001] This utility model relates to the technical field of gantry CNC machining centers, and in particular to a multi-functional milling head structure for gantry CNC machining centers. Background Technology

[0002] A gantry CNC machining center is a process testing instrument. Milling machine processing is inseparable from the machining spindle and various milling heads on it. Various milling tools required for machining can be clamped on the milling head. The spindle drives the milling head and drives the milling tools to complete the machining process. Most gantry milling machines use vertical machine tools to perform vertical milling. The spindle and milling head usually need to be pre-precision assembled. The milling tools are driven by the built-in transmission structure. The rotation structure is used to adjust the machining orientation of the milling head and milling tools. Therefore, a multi-functional milling head structure is particularly needed for gantry CNC machining centers.

[0003] However, the existing multi-functional milling head structure of gantry CNC machining centers has a single angle adjustment function, which can only achieve a limited angle adjustment and cannot flexibly adapt to diverse machining needs. If multi-angle machining is to be achieved, milling heads with different angles need to be changed frequently, which further reduces machining efficiency and increases production costs.

[0004] To address the aforementioned issues, a search revealed a patent with publication number CN220216861U disclosing a milling head connection structure for a CNC gantry machining center. The patent proposes that "a lifting ring moves downwards to push a limiting post, causing the limiting post to engage with the inside of a through hole, thus installing the mounting base and the milling head assembly together. Installation is relatively simple. The multiple through holes corresponding to the limiting post greatly improve the stability of the milling head assembly. Rotating the rotating ring allows multiple parts inside to move, and the vibrations generated by the CNC gantry machining center will not cause the milling head assembly to separate from the limiting post, significantly improving the stability of the milling head assembly. Furthermore, no jamming occurs during the installation of the milling head assembly." While this method allows for the installation of the milling head assembly by moving the lifting ring downwards to engage the limiting post with the through hole, it does not allow for adjustment of the milling head assembly's angle, resulting in poor practical applicability.

[0005] In light of this, in-depth research into the aforementioned issues led to the creation of this case. Utility Model Content

[0006] The purpose of this utility model is to provide a multi-functional milling head structure for a gantry CNC machining center, in order to solve the problem mentioned in the background art that the existing multi-functional milling head structure of the gantry CNC machining center has a single angle adjustment function, which can only achieve a limited angle adjustment and cannot flexibly adapt to diverse machining needs. If multi-angle machining is to be achieved, it is necessary to frequently change milling heads with different angles, which further reduces machining efficiency and increases production costs.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a multi-functional milling head structure for a gantry CNC machining center, including a milling head assembly, a drive shaft is provided on the upper surface of the milling head assembly, one end of the drive shaft is connected to a mounting base, one end of the mounting base is connected to a spindle, and a connecting mechanism is provided on the inner side of the mounting base;

[0008] The connecting mechanism includes a positioning groove, an annular groove, a first oil inlet pipe, a second oil inlet pipe, a first channel, a first oil passage, a second channel, a second oil passage, a first piston, a second piston, a first sealing ring, a second sealing ring, a first push rod, a second push rod, a third sealing ring, a fourth sealing ring, and a ball bearing. A positioning groove is formed on one side of the surface of the milling head assembly, and an annular groove is formed on one side of the surface of the milling head assembly. A first oil inlet pipe is sealed to one side of the surface of the mounting base, and a second oil inlet pipe is connected to one side of the surface of the mounting base. A first channel is formed on the inner side of the mounting base. The assembly has a first oil passage, a second channel on the inner side of the assembly base, a second oil passage inside the assembly base, a first piston and a second piston fitted inside the assembly base, a first sealing ring and a second sealing ring fitted inside the assembly base, a first push rod fitted inside the first channel, a second push rod fitted inside the second channel, a third sealing ring on the surface of the first piston, a fourth sealing ring on the surface of the second piston, and a ball bearing fitted at one end of the first push rod.

[0009] Preferably, the first oil inlet pipe is connected to the first oil passage, the first piston is fitted inside the first channel, and the first channel is connected to the first oil passage.

[0010] Preferably, the first piston is connected to the first push rod, and the second piston is connected to the second push rod.

[0011] Preferably, the second oil inlet pipe communicates with the second oil passage, the second piston is fitted inside the second channel, and the second channel communicates with the second oil passage.

[0012] Preferably, the first sealing ring is fitted onto the surface of the first push rod, and the second sealing ring is fitted onto the surface of the second push rod.

[0013] Preferably, one end of the second push rod matches the size of the positioning groove, and the positioning groove is distributed in a ring with equal spacing.

[0014] Preferably, the rolling ball is fitted with the gap between itself and the annular groove, the first push rod is evenly distributed, and the second push rod is evenly distributed.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. It can be installed and disassembled efficiently and conveniently. The milling head assembly is connected and fixed to the mounting base through the hydraulically driven first and second push rods. Compared with the traditional bolt fixing, there is no need for tedious tightening operations. Just control the injection and recovery of hydraulic oil to quickly complete the installation and disassembly of the milling head assembly, which greatly improves work efficiency and reduces equipment downtime.

[0017] 2. It features flexible angle adjustment. When the milling head assembly angle needs adjustment, by controlling the supply of hydraulic oil in the second oil circuit, the milling head assembly can be rotated while the first push rod is supported, achieving adjustment in eight angle positions. Increasing the number of positioning slots can further expand the adjustable angle range, flexibly meeting the diverse needs of different machining processes for milling head angles. This allows one machine to complete milling operations at multiple angles, demonstrating its multi-functionality. It eliminates the need for frequent milling head changes, reducing production costs.

[0018] 3. The double fixing method ensures structural reliability. The first ejector rod and rolling ball provide connection strength and fine adjustment capability, while the second ejector rod and positioning groove achieve precise positioning. The double fixing method works together to enhance the overall reliability and stability of the milling head structure, enabling the milling head to maintain good working condition even when subjected to complex cutting forces. Attached Figure Description

[0019] Figure 1 This is a cross-sectional view of the external structure of this utility model;

[0020] Figure 2 This is an exploded view of the connecting mechanism of this utility model;

[0021] Figure 3 This utility model Figure 2 Enlarged structural diagram at point A in the middle;

[0022] Figure 4 This utility model Figure 2 Enlarged structural diagram at point B.

[0023] In the diagram: 1. Milling head assembly; 2. Drive shaft; 3. Mounting base; 4. Spindle; 5. Connecting mechanism; 501. Positioning groove; 502. Annular groove; 503. First oil inlet pipe; 504. Second oil inlet pipe; 505. First channel; 506. First oil passage; 507. Second channel; 508. Second oil passage; 509. First piston; 510. Second piston; 511. First sealing ring; 512. Second sealing ring; 513. First push rod; 514. Second push rod; 515. Third sealing ring; 516. Fourth sealing ring; 517. Ball bearing. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1-4 This utility model provides a technical solution: a multi-functional milling head structure for a gantry CNC machining center, including a milling head assembly 1, a transmission shaft 2 is provided on the upper surface of the milling head assembly 1, one end of the transmission shaft 2 is connected to a mounting base 3, one end of the mounting base 3 is connected to a spindle 4, and a connecting mechanism 5 is provided on the inner side of the mounting base 3.

[0026] The connecting mechanism 5 includes a positioning groove 501, an annular groove 502, a first oil inlet pipe 503, a second oil inlet pipe 504, a first channel 505, a first oil passage 506, a second channel 507, a second oil passage 508, a first piston 509, a second piston 510, a first sealing ring 511, a second sealing ring 512, a first push rod 513, a second push rod 514, a third sealing ring 515, a fourth sealing ring 516, and a rolling ball 517. The positioning groove 501 and the annular groove 502 are formed on one side of the surface of the milling head assembly 1. The first oil inlet pipe 503 is sealed to one side of the surface of the mounting base 3, and the second oil inlet pipe 504 is connected to one side of the surface of the mounting base 3. The first channel 505 is formed on the inner side of the mounting base 3. The assembly base 3 has a first oil passage 506 inside, a second channel 507 inside, a second oil passage 508 inside, a first piston 509, a second piston 510 inside, a first sealing ring 511, a second sealing ring 512 inside, a first push rod 513 inside the first channel 505, a second push rod 514 inside the second channel 507, a third sealing ring 515 on the surface of the first piston 509, a fourth sealing ring 516 on the surface of the second piston 510, and a ball bearing 517 embedded at one end of the first push rod 513. This gantry CNC machining center is a multi-functional milling machine. When the milling head assembly is in operation, the first oil inlet pipe 503 and the second oil inlet pipe 504 are first connected to the external hydraulic oil system. Then, the worker embeds the upper surface of the milling head assembly 1 and its drive shaft 2 into the mounting base 3 to complete the initial connection. Subsequently, hydraulic oil is injected into the first oil inlet pipe 503 under the control of the external hydraulic oil system. Then, the hydraulic oil inside the first oil inlet pipe 503 flows into the first channel 505 through the first oil passage 506 that is connected to it. Under sufficient pressure, it pushes the first piston 509, which is fitted in the first channel 505, to move. Since the first piston 509 is connected to the first push rod 513, the first piston 509 drives the first push rod 513 to move, so that the rolling ball 517 at the end of the first push rod 513 is tightly engaged with the annular groove 502 on the surface of the milling head assembly 1. During the process, double-layer airtight treatment is achieved through the first sealing ring 511 and the third sealing ring 515 to prevent hydraulic oil from leaking out from the gap in the inner wall of the first channel 505, ensuring stable pressure in the first oil circuit. Simultaneously, the external hydraulic oil system controls the injection of hydraulic oil into the second inlet pipe 504. Subsequently, the hydraulic oil inside the second inlet pipe 504 flows into the second channel 507 through the second oil passage 508. Under a certain pressure, the hydraulic oil pushes the second piston 510 to move, thereby driving the second push rod 514 connected to the second piston 510 to move. This causes the second push rod 514 to insert into the annularly spaced and sized positioning grooves 501 on the surface of the milling head assembly 1, achieving precise positioning and secure fixation. At this point, the milling head assembly 1 needs to be slightly rotated. If rotation occurs...That is, if the second push rod 514 is not inserted into the positioning groove 501, simply rotate the lower milling head assembly 1 left and right to insert the second push rod 514 into the positioning groove 501. During this process, double-layer airtight treatment is performed through the second sealing ring 512 and the fourth sealing ring 516 to prevent hydraulic oil from leaking out from the gap in the inner wall of the second channel 507, ensuring the stability of the first oil circuit pressure. When it is necessary to adjust the angle of the milling head assembly 1, the external hydraulic oil system stops supplying oil to the second oil inlet pipe 504 and recovers the hydraulic oil. Under the loss of hydraulic oil pressure and external force, the second push rod 514 disengages from the annular groove 502 and the positioning groove 501. At this time, only the first The push rod 513 supports the milling head assembly 1, but can rotate the milling head assembly 1 to adjust its angle. It should be noted that the milling head assembly 1 can currently only be adjusted to eight angle positions. To adjust to more angle positions, more positioning slots 501 need to be created. When it is necessary to disassemble and replace another milling head assembly 1, the external hydraulic oil system's supply to the first oil inlet pipe 503 and the second oil inlet pipe 504 is stopped, and the hydraulic oil is recovered. After the hydraulic oil pressure is lost, under external force, the first push rod 513 and the second push rod 514 disengage from the annular groove 502 and the positioning slot 501 respectively, allowing the milling head assembly 1 to be quickly removed and replaced.

[0027] Furthermore, the first oil inlet pipe 503 is connected to the first oil passage 506, and the first piston 509 is fitted inside the first channel 505. The first channel 505 is also connected to the first oil passage 506. Through the arrangement of the first oil inlet pipe 503 and the first channel 505, in use, the first oil inlet pipe 503 is connected to the external hydraulic oil system, which is the channel for hydraulic oil to enter the first oil passage 506 inside the mounting base 3. By controlling the oil inlet, the first piston 509 and other components are driven to move inside the first channel 505. The first channel 505 is the movement channel of the first piston 509, guiding the movement direction of the first piston 509 and providing space for the movement of the first piston 509.

[0028] Furthermore, the first piston 509 is connected to the first push rod 513, and the second piston 510 is connected to the second push rod 514. Through the arrangement of the first piston 509 and the first push rod 513, in use, the first piston 509 can push the first push rod 513 to move under the action of hydraulic oil. The first push rod 513 can move under the drive of the first piston 509, so that the rolling ball 517 at the end of the first push rod 513 cooperates with the annular groove 502.

[0029] Furthermore, the second oil inlet pipe 504 is connected to the second oil passage 508, and the second piston 510 is fitted inside the second channel 507. The second channel 507 is connected to the second oil passage 508. Through the setting of the second oil inlet pipe 504, in use, the second oil inlet pipe 504 is connected to the external hydraulic oil system, which is the channel for hydraulic oil to enter the second oil passage 508 inside the mounting base 3. By controlling the oil inlet, the second piston 510 and other components are driven to move inside the second channel 507.

[0030] Furthermore, a first sealing ring 511 is fitted onto the surface of the first push rod 513, and a second sealing ring 512 is fitted onto the surface of the second push rod 514. With the first sealing ring 511 and the second sealing ring 512 in use, the first sealing ring 511, fitted onto the surface of the first push rod 513, prevents hydraulic oil from leaking out from the gap between the first push rod 513 and the end of the first channel 505, ensuring the sealing and pressure stability of the first oil circuit. The second sealing ring 512, fitted onto the surface of the second push rod 514, prevents hydraulic oil from leaking out from the gap between the second push rod 514 and the end of the second channel 507, ensuring the sealing and pressure stability of the second oil circuit.

[0031] Furthermore, one end of the second push rod 514 matches the size of the positioning groove 501. The positioning groove 501 is distributed in a ring with equal spacing. With the setting of the positioning groove 501, during use, the positioning groove 501 is distributed on the surface of the milling head assembly 1. By cooperating with the second push rod 514, the milling head assembly 1 is accurately positioned and firmly fixed in the mounting base 3, ensuring the positional accuracy of the milling head assembly 1 during processing.

[0032] Furthermore, the rolling ball 517 is fitted with the annular groove 502 with a gap. The first push rod 513 is evenly distributed, and the second push rod 514 is evenly distributed. Through the setting of the annular groove 502 and the rolling ball 517, during use, the annular groove 502 is opened on the surface of the milling head assembly 1. By cooperating with the first push rod 513 and the rolling ball 517 at its end, it provides a certain connection strength for the milling head assembly 1. At the same time, the rolling ball 517 can roll in the annular groove 502, which facilitates the adjustment of the angle position of the milling head assembly 1. The rolling ball 517 is embedded in one end of the first push rod 513 and is fitted with the annular groove 502 with a gap. While providing connection strength, it allows the milling head assembly 1 to be adjusted in angle to adapt to different processing requirements.

[0033] Working Principle: When the multi-functional milling head structure of this gantry CNC machining center is working, the first oil inlet pipe 503 and the second oil inlet pipe 504 are first connected to the external hydraulic oil system. Then, the worker embeds the upper surface of the milling head assembly 1 and its drive shaft 2 into the mounting base 3 to complete the initial connection. Subsequently, hydraulic oil is injected into the first oil inlet pipe 503 under the control of the external hydraulic oil system. Then, the hydraulic oil inside the first oil inlet pipe 503 flows into the first channel 505 through the first oil passage 506 that is connected to it. Under sufficient pressure, it pushes the first piston 509, which is embedded in the first channel 505, to move. Since the first piston 509 is connected to the first push rod 513, the first piston 509 drives the first push rod 513 to move, so that the end of the first push rod 513... The rolling ball 517 of the milling head assembly 1 is tightly fitted with the annular groove 502 on the surface of the milling head assembly 1. During this process, double-layer airtight treatment is achieved through the first sealing ring 511 and the third sealing ring 515 to prevent hydraulic oil from leaking out from the gap in the inner wall of the first channel 505, thus ensuring the stability of the first oil circuit pressure. At the same time, the external hydraulic oil system controls the injection of hydraulic oil into the second oil inlet pipe 504. Subsequently, the hydraulic oil inside the second oil inlet pipe 504 flows into the second channel 507 through the second oil passage 508. Under a certain pressure, the hydraulic oil pushes the second piston 510 to move, thereby driving the second push rod 514 connected to the second piston 510 to move, so that the second push rod 514 is inserted into the annularly distributed and sized parts on the surface of the milling head assembly 1. Within the matching positioning groove 501, precise positioning and secure fixation are achieved. At this point, the milling head assembly 1 needs to be slightly rotated. If rotation occurs, it means the second push rod 514 is not inserted into the positioning groove 501. Simply rotate the lower milling head assembly 1 left or right to insert the second push rod 514 into the positioning groove 501. During this process, double-layer airtight treatment is performed through the second sealing ring 512 and the fourth sealing ring 516 to prevent hydraulic oil from leaking out from the gap in the inner wall of the second channel 507, ensuring stable pressure in the first oil circuit. When it is necessary to adjust the angle of the milling head assembly 1, the external hydraulic oil system stops supplying oil to the second oil inlet pipe 504 and recovers the hydraulic oil. Under the loss of hydraulic oil pressure and external force, the second push rod 514 disengages from the annular groove 502 and the positioning groove 501. In slot 501, only the first push rod 513 supports the milling head assembly 1, but the milling head assembly 1 can be rotated to adjust its angle. It should be noted that the milling head assembly 1 can currently only be adjusted to eight angle positions. If more angle positions are to be adjusted, more positioning slots 501 need to be opened. When it is necessary to disassemble and replace other milling head assemblies 1, the external hydraulic oil system is stopped from supplying oil to the first oil inlet pipe 503 and the second oil inlet pipe 504 and the hydraulic oil is recovered. After the hydraulic oil pressure is lost, under the external force, the first push rod 513 and the second push rod 514 disengage from the annular groove 502 and the positioning slot 501 respectively, so that the milling head assembly 1 can be quickly taken out and replaced. The specific workpiece size can be manufactured and installed according to the actual situation.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-functional milling head structure for a gantry CNC machining center, comprising a milling head assembly (1), characterized in that: The upper surface of the milling head assembly (1) is provided with a drive shaft (2), one end of the drive shaft (2) is connected to a mounting base (3), one end of the mounting base (3) is connected to a main shaft (4), and a connecting mechanism (5) is provided on the inner side of the mounting base (3). The connecting mechanism (5) includes a positioning groove (501) on one side of the surface of the milling head assembly (1), an annular groove (502) on one side of the surface of the milling head assembly (1), a first oil inlet pipe (503) sealed to one side of the surface of the mounting base (3), a second oil inlet pipe (504) connected to one side of the surface of the mounting base (3), a first channel (505) on the inner side of the mounting base (3), a first oil passage (506) on the inside of the mounting base (3), a second channel (507) on the inner side of the mounting base (3), a second oil passage (508) on the inside of the mounting base (3), and a second oil passage (508) on the inside of the mounting base (3). The first piston (509) is fitted inside the assembly base (3), the second piston (510) is fitted inside the assembly base (3), the first sealing ring (511) is fitted inside the assembly base (3), the second sealing ring (512) is fitted inside the assembly base (3), the first push rod (513) is fitted inside the first channel (505), the second push rod (514) is fitted inside the second channel (507), the surface of the first piston (509) is fitted with a third sealing ring (515), the surface of the second piston (510) is fitted with a fourth sealing ring (516), and one end of the first push rod (513) is fitted with a ball bearing (517).

2. The multi-functional milling head structure of a gantry CNC machining center according to claim 1, characterized in that: The first oil inlet pipe (503) is connected to the first oil passage (506), and the first piston (509) is fitted inside the first channel (505), which is connected to the first oil passage (506).

3. The multi-functional milling head structure of a gantry CNC machining center according to claim 1, characterized in that: The first piston (509) is connected to the first push rod (513), and the second piston (510) is connected to the second push rod (514).

4. The multi-functional milling head structure of a gantry CNC machining center according to claim 1, characterized in that: The second oil inlet pipe (504) is connected to the second oil passage (508), and the second piston (510) is fitted inside the second channel (507), which is connected to the second oil passage (508).

5. The multi-functional milling head structure of a gantry CNC machining center according to claim 1, characterized in that: The first sealing ring (511) is fitted onto the surface of the first push rod (513), and the second sealing ring (512) is fitted onto the surface of the second push rod (514).

6. The multi-functional milling head structure of a gantry CNC machining center according to claim 1, characterized in that: One end of the second push rod (514) matches the size of the positioning groove (501), which is distributed in a ring with equal spacing.

7. The multi-functional milling head structure of a gantry CNC machining center according to claim 1, characterized in that: The gap between the rolling ball (517) and the ring groove (502) is matched, the first push rod (513) is evenly distributed, and the second push rod (514) is evenly distributed.

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