Milling power head for combined machine tool
By employing a combination design of multiple sealing rings and oil seals in the milling power head, the problems of coolant spraying and poor sealing are solved, achieving stable transmission and uniform distribution of coolant, and improving tool durability and machining accuracy.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN ZHENGCAN TECH CO LTD
- Filing Date
- 2025-06-18
- Publication Date
- 2026-05-26
AI Technical Summary
Existing milling power heads have problems such as the spraying of cutting fluid and coolant on the outside of parts or poor sealing, resulting in uneven cooling or leakage.
The design employs a combination of multiple sealing rings and oil seals, along with sealing structures between the front cover and the power housing, as well as between the power housing and the spindle. The spindle uses a central water outlet to ensure stable coolant delivery and effective tool cooling.
It improves the sealing of the coolant, reduces leakage, ensures uniform coolant distribution, extends tool life, reduces wear and breakage risk, and improves machining accuracy and efficiency.
Smart Images
Figure CN224273433U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of machine tools, and in particular to a milling power head for a combination machine tool. Background Technology
[0002] A milling power head, also known as a power tool holder, refers to a tool holder that is mounted on a power tool turret and can be driven by a servo motor. This type of tool holder is generally used on mill-turn machines, and a few can also be used on machining centers with power tool turrets.
[0003] With the increasing complexity of machined parts, the improvement of precision levels and machining efficiency, multi-axis and high speed have become essential conditions for machine tools. In addition to the trend of machining centers towards multifunctionality, lathes have evolved from early horizontal lathes to many new machining forms, such as double turret lathes, vertical lathes, inverted lathes, and mill-turning composite machines, to meet the needs of machining methods in the new era.
[0004] Existing technologies suffer from issues such as the spraying of cutting fluid and coolant onto the exterior of components, or poor sealing of the power head, resulting in uneven cooling or leakage.
[0005] Therefore, it is necessary to provide a milling power head for combination machine tools to solve the above-mentioned technical problems. Utility Model Content
[0006] This utility model provides a milling power head for a combination machine tool, which solves the problems of current milling power heads having issues such as the spraying of cutting fluid and coolant on the outside of parts, or poor sealing of the power head leading to uneven cooling or leakage.
[0007] To solve the above-mentioned technical problems, this utility model provides a milling power head for a combined machine tool, comprising:
[0008] A power housing, wherein a second oil seal is fixedly installed inside the power housing;
[0009] The power housing is equipped with a main shaft inside. A nut is threaded onto the surface of the main shaft. A first semi-circular pin and a second semi-circular pin are provided on the surface of the main shaft. A third oil seal is fixedly installed on the surface of the main shaft. A needle roller bearing is provided on the surface of the main shaft. A first retaining ring, a second retaining ring, and a third retaining ring are provided on the surface of the needle roller bearing.
[0010] An oil seal rotating block is fixedly installed on the surface of the main shaft, a fourth sealing ring is fixedly installed inside the oil seal rotating block, and a fifth sealing ring is fixedly installed inside the oil seal rotating block.
[0011] An oil seal fixing block is fixedly installed inside the power housing. A first sealing ring is fixedly installed inside the oil seal fixing block. A second sealing ring is fixedly installed inside the oil seal fixing block. A first oil seal is provided inside the oil seal fixing block. A fourth oil seal is provided inside the oil seal fixing block.
[0012] A first bearing is fixedly installed inside the power housing, and a second bearing is fixedly installed inside the power housing.
[0013] Preferably, the spindle has a pin inside and a coupling at one end.
[0014] Preferably, the surface of the power housing is provided with a front cover, and the interior of the front cover is provided with a third sealing ring.
[0015] Preferably, the power housing is internally threaded with a first screw and the power housing is internally threaded with a second screw.
[0016] Preferably, both the fourth and fifth sealing rings are fitted onto the surface of the spindle.
[0017] Preferably, the power housing has multiple slots inside, and the milling power head further includes a first fixing block, a second fixing block, a third fixing block, and a fourth fixing block, which are respectively fixedly installed inside the multiple slots.
[0018] Preferably, the power housing has two water inlets inside, and the milling power head also includes a seventh sealing ring and an eighth sealing ring, which are respectively fixedly installed inside the two water inlets.
[0019] Compared with related technologies, the milling power head for combined machine tools provided by this utility model has the following beneficial effects:
[0020] This utility model provides a milling power head for a combination machine tool. By using multiple sealing rings and oil seals, it seals the front cover and the power housing, as well as the power housing and the spindle, thereby reducing leakage. At the same time, water is discharged from the center of the spindle through the central spindle axis, providing stable transmission characteristics. This ensures that the transmission of liquid media will not be interrupted or leaked due to eccentricity, shaking, or other problems. It also provides effective internal cooling for the tool tip, improving tool durability and reducing the risk of tool wear and breakage. Attached Figure Description
[0021] Figure 1This is a schematic diagram of a preferred embodiment of a milling power head for a combined machine tool provided by this utility model;
[0022] Figure 2 for Figure 1 The diagram shows a front view of the overall structure of the milling power head;
[0023] Figure 3 for Figure 1 The diagram shows a cross-sectional view of the overall structure of the milling power head.
[0024] Figure 4 for Figure 1 The diagram shows a cross-sectional view of the main shaft.
[0025] The diagram is labeled as follows: 1. Power housing, 2. Main shaft, 3. First sealing ring, 4. Oil seal fixing block, 5. Second sealing ring, 6. First oil seal, 7. First bearing, 8. First fixing block, 9. Nut, 10. First retaining ring, 11. Second oil seal, 12. First semi-circular cut, 13. Pin, 14. Coupling, 15. Third oil seal, 16. Front cover, 17. Second bearing, 18. Third sealing ring, 19. Fourth oil seal, 20. Fourth sealing ring, 21. Oil seal rotating block, 22. Fifth sealing ring, 23. Second fixing block, 24. Sixth sealing ring, 25. Needle roller bearing, 26. Second retaining ring, 27. Third retaining ring, 28. Second semi-circular cut, 29. Seventh sealing ring, 30. Third fixing block, 31. Fourth fixing block, 32. Eighth sealing ring, 33. First screw, 34. Second screw. Detailed Implementation
[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0027] Please refer to the following: Figure 1 , Figure 2 , Figure 3 and Figure 4 ,in, Figure 1 This is a schematic diagram of a preferred embodiment of a milling power head for a combined machine tool provided by this utility model; Figure 2 for Figure 1 The diagram shows a front view of the overall structure of the milling power head; Figure 3 for Figure 1 The diagram shows a cross-sectional view of the overall structure of the milling power head. Figure 4 for Figure 1 The diagram shows a cross-sectional view of the spindle. A milling power head for a combination machine tool includes:
[0028] Power housing 1, wherein a second oil seal 11 is fixedly installed inside the power housing;
[0029] The power housing 1 is equipped with a main shaft 2 inside. A nut 9 is threaded onto the surface of the main shaft 2. A first semi-circular pin 12 and a second semi-circular pin 28 are provided on the surface of the main shaft 2. A third oil seal 15 is fixedly installed on the surface of the main shaft 2. A needle roller bearing 25 is provided on the surface of the main shaft 2. A first retaining ring 10, a second retaining ring 26, and a third retaining ring 27 are provided on the surface of the needle roller bearing 25.
[0030] An oil seal rotating block 21 is fixedly installed on the surface of the main shaft 2. A fourth sealing ring 20 is fixedly installed inside the oil seal rotating block 21. A fifth sealing ring 22 is fixedly installed inside the oil seal rotating block 21.
[0031] An oil seal fixing block 4 is fixedly installed inside the power housing 1. A first sealing ring 3 is fixedly installed inside the oil seal fixing block 4. A second sealing ring 5 is fixedly installed inside the oil seal fixing block 4. A first oil seal 6 is provided inside the oil seal fixing block 4. A fourth oil seal 19 is provided inside the oil seal fixing block 4.
[0032] A first bearing 7 is fixedly installed inside the power housing 1, and a second bearing 17 is fixedly installed inside the power housing 1.
[0033] Spindle 2 is used to hold the cutting tools. It rotates and has a water outlet in the middle. The water enters through the oil seal rotating block.
[0034] The oil seal fixing block 4 is used to fix the oil seal. It has three grooves on its outer surface. Two of them are for installing sealing rings, namely the first sealing ring 3 and the second sealing ring 5. The middle groove is for circulating water and has four water inlet holes. The inner hole has two steps, inner and outer, for installing oil seals, namely the first oil seal 6 and the fourth oil seal 19, to prevent water leakage.
[0035] The first bearing 7 and the second bearing 17 are fixed on the outer circle of the power head housing and on the inner circle of the main shaft 2, serving to fix them during high-speed rotation.
[0036] The first retaining ring 10 and the third retaining ring 27 are used to retain the outer circle of the needle roller bearing 25, and the second retaining ring 26 is used to retain the inner circle of the needle roller bearing 25 to prevent the bearing from moving.
[0037] When the equipment rotates at high speed, nut 9 serves to fix the spindle 2 and the bearing.
[0038] When the main shaft 2 rotates at high speed, the second oil seal 11 prevents debris and water from entering from the rear, and the third oil seal 15 prevents debris and water from entering from the front.
[0039] When the equipment rotates at high speed, the first semicircular cutter 12 and the second semicircular cutter 28 serve a fixing function.
[0040] The oil seal rotating block 21 is fixed on the main shaft 2. The first oil seal 6 and the fourth oil seal 19 are installed on the outer circle of the oil seal fixing block 4. When the main shaft 2 rotates at high speed, it prevents water from leaking out. The inner circle of the oil seal fixing block 4 has two grooves for installing the fourth sealing ring 20 and the fifth sealing ring 22. When the main shaft 2 and the oil seal fixing block 4 are connected, it prevents leakage. The outer circle of the oil seal fixing block 4 has four water inlets. Water enters from the oil seal fixing block and then enters the main shaft 2 through the oil seal rotating block.
[0041] The spindle 2 has a pin 13 inside and a coupling 14 at one end.
[0042] The coupling 14 mainly connects the spindle 2 and the turret, and plays a rotating role. It is fixed by a semi-circular cutter and a C-shaped cutter pin 13.
[0043] The surface of the power housing 1 is provided with a front cover 12, and the interior of the front cover 12 is provided with a third sealing ring 18.
[0044] The front cover is used to fix the power housing, the first bearing 7, and the third oil seal 15.
[0045] The power housing 1 is internally threaded with a first screw 33 and a second screw 34.
[0046] The first screw 33 and the second screw 34 are sealing screws for the power housing.
[0047] Both the fourth sealing ring 20 and the fifth sealing ring 22 are fitted onto the surface of the main shaft 2.
[0048] The power housing 1 has multiple slots inside, and the milling power head also includes a first fixing block 8, a second fixing block 23, a third fixing block 30 and a fourth fixing block 30. The first fixing block 8, the second fixing block 23, the third fixing block 30 and the fourth fixing block 30 are respectively fixedly installed inside the multiple slots.
[0049] Multiple fixing blocks are used to install the power housing 1.
[0050] The power housing 1 has two water inlets inside. The milling power head also includes a seventh sealing ring 29 and an eighth sealing ring 32, which are respectively fixedly installed inside the two water inlets.
[0051] Compared to other water outlet methods, the center water outlet of spindle 2 has lower noise. This is because the liquid flows very stably across the central axis, reducing friction and vibration-induced noise. As a result, the mechanical equipment experiences less vibration during transmission, achieving better mechanical performance.
[0052] The liquid flow from the center outlet flows along the central axis, and the liquid momentum is very balanced in all directions. Therefore, the mechanical equipment experiences less vibration during transmission, which can achieve better mechanical effects.
[0053] The center outlet coolant can be pressurized to allow the coolant to be directly transferred to the tool tip through the inside of the spindle, thereby increasing the cutting speed and improving production efficiency.
[0054] Because the central water outlet can effectively cool the cutting tool and flush away broken chips and debris during machining, it reduces the frequency of tool replacement due to clogging or overheating.
[0055] In deep hole machining, the center-outlet spindle can achieve the requirement of one-time through-hole drilling without steps, solving the accuracy deviation or misalignment problem caused by drilling at both ends and improving the machining accuracy.
[0056] In areas requiring high hygiene standards, such as medical equipment and food processing equipment, central outlet systems can meet the hygiene standards for liquid media.
[0057] Compared with related technologies, the milling power head for combined machine tools provided by this utility model has the following beneficial effects:
[0058] This utility model provides a milling power head for a combination machine tool. By using multiple sealing rings and oil seals, the front cover 16 and the power housing 1, as well as the power housing 1 and the spindle 2, are sealed to reduce leakage. At the same time, water is discharged from the center of the machine through the central spindle 2 and the central spindle axis, providing stable transmission characteristics. This ensures that the transmission of liquid media will not be interrupted or leaked due to eccentricity, shaking, or other problems. It also provides effective internal cooling for the tool tip, improving tool durability and reducing the risk of tool wear and breakage.
[0059] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.
Claims
1. A milling head for a modular machine tool, characterized in that, include: A power housing, wherein a second oil seal is fixedly installed inside the power housing; The power housing is equipped with a main shaft inside. A nut is threaded onto the surface of the main shaft. A first semi-circular pin and a second semi-circular pin are provided on the surface of the main shaft. A third oil seal is fixedly installed on the surface of the main shaft. A needle roller bearing is provided on the surface of the main shaft. A first retaining ring, a second retaining ring, and a third retaining ring are provided on the surface of the needle roller bearing. An oil seal rotating block is fixedly installed on the surface of the main shaft, a fourth sealing ring is fixedly installed inside the oil seal rotating block, and a fifth sealing ring is fixedly installed inside the oil seal rotating block. An oil seal fixing block is fixedly installed inside the power housing. A first sealing ring is fixedly installed inside the oil seal fixing block. A second sealing ring is fixedly installed inside the oil seal fixing block. A first oil seal is provided inside the oil seal fixing block. A fourth oil seal is provided inside the oil seal fixing block. A first bearing is fixedly installed inside the power housing, and a second bearing is fixedly installed inside the power housing.
2. A combined machine tool milling head according to claim 1, characterized in that The spindle has a pin inside and a coupling at one end.
3. A combined machine tool milling head according to claim 1, characterized in that, The surface of the power housing is provided with a front cover, and the interior of the front cover is provided with a third sealing ring.
4. A combined machine tool milling head according to claim 3, characterized in that The power housing is internally threaded with a first screw, and the power housing is internally threaded with a second screw.
5. The combination machine tool milling head according to claim 1, characterized in that, Both the fourth and fifth sealing rings are fitted onto the surface of the main shaft.
6. The combination machine tool milling head according to claim 1, characterized in that, The power housing has multiple slots inside, and the milling power head also includes a first fixing block, a second fixing block, a third fixing block, and a fourth fixing block. The first fixing block, the second fixing block, the third fixing block, and the fourth fixing block are respectively fixedly installed inside the multiple slots.
7. A combined machine tool milling head according to claim 6, characterized in that The power housing has two water inlets inside, and the milling power head also includes a seventh sealing ring and an eighth sealing ring, which are respectively fixedly installed inside the two water inlets.