A quick-connect coupling for high-pressure internal cooling oil pipes of CNC cutting tools

Abstract

This utility model discloses a quick-change connector for high-pressure internal cooling oil pipes of CNC cutting tools, relating to the field of CNC machining technology, including a male connector and a female connector. The female connector is externally connected to a spring and a sliding sleeve, with both ends of the spring abutting against the female connector and the sliding sleeve respectively. The male connector has a groove on its surface, and the female connector has an internal cavity with a limiting hole on its surface, where a ball bearing is rolled. The sliding sleeve has a fixed convex ring and a pre-reserved second annular groove, with the ball bearing abutting against the convex ring or the second annular groove. The male connector is threaded to the tool holder, and the female connector has a fluid inlet communicating with the cavity. Sealing gaskets are provided on the inner wall and at the ends. This connector achieves quick docking and disengagement by controlling the ball bearing engagement through the sliding of the sliding sleeve. Double sealing ensures no leakage of high-pressure cooling oil, improving tool changing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of CNC machining technology, and in particular to a quick-change connector for a high-pressure internal cooling oil pipe for CNC cutting tools. Background Technology

[0002] In the field of CNC machining, the cooling effect of cutting tools directly affects machining accuracy and tool life. As a key connecting component of the cooling system, the reliability and ease of use of high-pressure internal cooling oil pipes are crucial. Traditional CNC tool internal cooling oil pipe connectors mostly use threaded connections or snap-fit ​​structures, which have significant drawbacks: threaded connections require multiple rotation operations, which are time-consuming in scenarios with frequent tool changes, reducing machining efficiency; snap-fit ​​structures are prone to wear and locking failure after long-term use, posing a risk of high-pressure cooling oil leakage. Utility Model Content

[0003] To address the technical problems existing in the background art, this utility model proposes a quick-change connector for high-pressure internal cooling oil pipes of CNC cutting tools.

[0004] This utility model proposes a quick-change connector for high-pressure internal cooling oil pipes of CNC cutting tools, including a male connector and a female connector. The female connector is externally connected to a spring and a sliding sleeve. The two ends of the spring abut against the female connector and the sliding sleeve, respectively. A groove is formed around the surface of the male connector, and a cavity is formed inside the female connector. Several limiting holes communicating with the cavity are formed around the surface of the female connector. A ball bearing is rolled inside each limiting hole. A convex ring is fixedly connected inside the sliding sleeve, and a second annular groove is reserved on one side of the convex ring inside the sliding sleeve. Several balls abut against the convex ring or the second annular groove.

[0005] Furthermore, a nut is fixedly connected to the outside of the male head, and threads are formed on the surface of the male head near its end to thread the male head to the tool holder.

[0006] Furthermore, the surface of the female connector is provided with a first threaded liquid inlet hole that communicates with the cavity to inject cooling oil into the cavity, which is connected to the interior of the male connector.

[0007] Furthermore, the surface of the female head is provided with a first step protrusion, the side of the convex ring is provided with a second step protrusion, and the two ends of the spring abut against the first step protrusion and the second step protrusion, respectively.

[0008] Furthermore, a first annular groove is formed at the end of the female head, and a second sealing gasket is provided in the first annular groove.

[0009] Furthermore, a third annular groove is pre-formed on the inner wall of the female head, and a first sealing gasket is installed in the third annular groove.

[0010] The beneficial effects of this utility model are as follows: Through the elastic cooperation between the external spring of the female head and the sliding sleeve, the quick engagement structure between the ball and the male head groove, and the double sealing design of the first sealing gasket and the second sealing gasket, the rapid connection and disconnection of the high-pressure internal cooling oil pipe of CNC tools is realized. At the same time, the sealing performance of the cooling oil under high pressure conditions is effectively guaranteed, which not only improves the tool replacement efficiency, but also avoids the resource waste and environmental pollution caused by cooling oil leakage. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the disassembled structure of this utility model;

[0012] Figure 2 This is a schematic diagram of the male connector in this utility model;

[0013] Figure 3 This is a schematic diagram of the structure of the female head in this utility model;

[0014] Figure 4 This is a schematic diagram of the structure of the sliding sleeve in this utility model;

[0015] Figure 5 This is a schematic diagram of the assembly structure of this utility model;

[0016] Figure 6 This is a half-sectional view of the assembled version of this utility model;

[0017] Figure 7 This is a schematic diagram of the disassembled structure of the present invention in use;

[0018] Figure 8 This is a schematic diagram of the assembly structure of the present invention in use.

[0019] In the diagram: 1. Male end; 11. Slot; 12. Nut; 13. Thread; 2. Female end; 21. Cavity; 22. Limiting hole; 23. First threaded liquid inlet hole; 24. First stepped protrusion; 25. First annular groove; 3. Spring; 4. Sliding sleeve; 41. Convex ring; 42. Second stepped protrusion; 43. Second annular groove; 5. Ball bearing; 6. First sealing washer; 7. Second sealing washer; 8. Tool holder; 81. Second threaded liquid inlet hole; 82. Drain hole. Detailed Implementation

[0020] Reference Figure 1-8 This utility model proposes a quick-connect coupling for high-pressure internal cooling oil pipes of CNC cutting tools, aiming to achieve rapid connection and disconnection of high-pressure internal cooling oil pipes for CNC cutting tools, while ensuring sealing and stability after connection. It mainly consists of a male connector 1, a female connector 2, a spring 3, a sliding sleeve 4, a ball bearing 5, a first sealing washer 6, and a second sealing washer 7. The specific technical solution is as follows:

[0021] The male end 1 has a groove 11 around its surface and an external fixed connection nut 12. The surface near the end has a thread 13. The tool holder 8 has a cooling channel inside. The inlet of the cooling channel is connected to the second threaded liquid inlet 81, and the outlet is connected to the drain hole 82. The threaded connection between the male end 13 and the second threaded liquid inlet 81 is achieved. The nut 12 is used to reinforce the connection and ensure that the male end 1 can be firmly installed on the tool holder 8.

[0022] The female head 2 has an internal cavity 21, and several limiting holes 22 connected to the cavity 21 are formed around its surface. The surface also has a first threaded liquid inlet hole 23 connected to the cavity 21. The surface is provided with a first stepped protrusion 24, and the end is provided with a first annular groove 25. A third annular groove is reserved in the inner wall. The ball 5 is rolled inside each limiting hole 22, and part of the ball extends into the cavity 21 and can engage with the slot 11 of the male head 1. The first sealing gasket 6 is provided in the third annular groove in the inner wall of the female head 2 to enhance the sealing performance when the female head 2 is connected to the male head 1. The second sealing gasket 7 is provided in the first annular groove 25 at the end of the female head 2 to further improve the sealing performance of the connection. The female head 2 is externally connected to a spring 3 and a sliding sleeve 4. The spring 3 is sleeved on the outside of the female head 2, and the sliding sleeve 4 is also movably sleeved on the outside of the female head 2 and is located on the side of the spring 3 away from the first stepped protrusion 24.

[0023] The sliding sleeve 4 is internally fixedly connected to the protruding ring 41. The side of the protruding ring 41 is provided with a second step protrusion 42. The inside of the protruding ring 41 is provided with a second ring groove 43. The two ends of the spring 3 abut against the first step protrusion 24 of the female head 2 and the second step protrusion 42 of the sliding sleeve 4, respectively. Under the elastic action of the spring 3, the sliding sleeve 4 can slide outside the female head 2. Several balls 5 abut against the protruding ring 41 or the second ring groove 43 of the sliding sleeve 4. By sliding the sliding sleeve 4, the force state of the balls 5 can be changed, so as to lock or separate the male head 1 and the female head 2.

[0024] The cavity 21 of the female connector 2 is connected to the interior of the male connector 1. External cooling oil is injected into the cavity 21 through the first threaded inlet hole 23, and then flows into the interior of the male connector 1 through the cavity 21, thus realizing the delivery of cooling oil.

[0025] Work process:

[0026] First, using nut 12, thread 13 and second threaded liquid inlet hole 81, the male head 1 is installed on the tool holder 8. After installation, the interior of the male head 1 is connected to the cooling channel. When the male head 1 is connected to the female head 2 and cooling oil is injected into it, the cooling oil will flow along the cooling channel and be discharged through the drain hole 82, so that the cooling oil can be delivered to the tool head to cool it down.

[0027] Subsequently, the female connector 2, which connects to the oil pipe via the first threaded inlet hole 23, is connected to the male connector 1. During connection, the sliding sleeve 4 is pushed by hand to move, causing the spring 3 to be compressed. At the same time, several balls 5 that were originally abutting against the convex ring 41 will align with the second annular groove 43 as the sliding sleeve 4 moves. At this time, the male connector 1 is inserted into the cavity 21. The insertion of the male connector 1 will squeeze several balls 5 into the second annular groove 43 simultaneously. After the male connector 1 is fully inserted, the sliding sleeve 4 is released. At this time, the spring 3 will extend to its original length, thereby pushing the sliding sleeve 4 to return to its original position. During the return process, the convex ring 41 will again abut against several balls 5, pushing the balls 5 into the retaining groove 11 for engagement. At this time, the male connector 1 and the female connector 2 have completed the quick connection. After connection, the cooling oil will not leak due to the action of the first sealing gasket 6 and the second sealing gasket 7.

[0028] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A quick-change connector for high-pressure internal cooling oil pipes of a numerical control tool, characterized in that, The device includes a male head (1) and a female head (2). The female head (2) is externally connected to a spring (3) and a sliding sleeve (4). The two ends of the spring (3) abut against the female head (2) and the sliding sleeve (4) respectively. A groove (11) is opened around the surface of the male head (1). A cavity (21) is opened inside the female head (2). Several limiting holes (22) connected to the cavity (21) are opened around the surface of the female head (2). A ball (5) is rolled inside each limiting hole (22). A convex ring (41) is fixedly connected inside the sliding sleeve (4). A second ring groove (43) is reserved on one side of the convex ring (41) inside the sliding sleeve (4). Several balls (5) abut against the convex ring (41) or the second ring groove (43).

2. The quick change coupling for high pressure internal coolant tube of CNC cutting tool according to claim 1, characterized in that, The male head (1) is externally fixedly connected to a nut (12), and the surface of the male head (1) near the end is threaded (13) to thread the male head (1) to the tool holder.

3. The quick change coupling for high pressure internal coolant tube of CNC cutting tool according to claim 1, characterized in that, The surface of the female head (2) is also provided with a first threaded liquid inlet hole (23) that communicates with the cavity (21) to inject cooling oil into the cavity (21), and the cavity (21) is connected to the interior of the male head (1).

4. The quick change coupling for high pressure internal coolant tube of CNC cutting tool according to claim 1, characterized in that, The surface of the female head (2) is provided with a first step protrusion (24), and the side of the convex ring (41) is provided with a second step protrusion (42). The two ends of the spring (3) abut against the first step protrusion (24) and the second step protrusion (42) respectively.

5. The quick change coupling for high pressure internal coolant tube of CNC cutting tool according to claim 1, characterized in that, The end of the female head (2) has a first annular groove (25) and a second sealing gasket (7) is provided in the first annular groove (25).

6. The quick change coupling for high pressure internal coolant tube of CNC cutting tool according to claim 1, characterized in that, The inner wall of the female head (2) has a third annular groove, and a first sealing gasket (6) is provided in the third annular groove.

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