High-precision milling forming equipment for power output shaft

Abstract

The invention relates to the technical field of milling, and discloses power output shaft high-precision milling forming equipment which comprises a milling machine tool, a live center is installed on the surface of the milling machine tool, a plurality of lubricating cavities are annularly formed in the outer surface of the live center at equal intervals, and an oil storage cavity communicating with the lubricating cavities is formed in the rear end of the live center; lubricating oil is stored in the oil storage cavity, a closing piece is installed in the oil storage cavity, a locking sleeve plate is installed on the outer surface of the live center, and the oil storage strip is combined with the unique lubricating cavity, the oil storage cavity and the closing piece, so that the problem that in the prior art, an oil nozzle of a center lubricating system is prone to being blocked by metal cuttings and dust, and consequently lubrication fails is solved; the oil storage strip is located in the lubricating cavity, a main channel communicated with the outside is only provided with the oil seepage holes, the risk that chippings enter is greatly reduced, meanwhile, the oil storage strip can block the chippings, the possibility of lubrication failure is reduced, and the stability of equipment operation is effectively guaranteed.

Description

Technical Field

[0001] This invention relates to the field of milling technology, specifically to a high-precision milling forming device for power output shafts. Background Technology

[0002] The power take-off shaft milling unit is a highly efficient specialized machine for machining power take-off shafts. This unit employs a dual clamping system of chuck and centers to ensure workpiece stability and coaxiality during machining. The chuck secures the shaft end, while the centers support the other end, forming a rigid clamping structure. During machining, the unit is equipped with various cutting tools: first, a high-feed roughing cutter is used to quickly remove excess material, improving machining efficiency; then, a precision spline milling cutter is switched on, and the tool path is precisely controlled by a CNC system to machine high-precision spline teeth. The entire process allows for automated tool changing and continuous machining, ensuring both machining quality and improved production efficiency, making it particularly suitable for mass production of power take-off shafts.

[0003] However, existing milling forming equipment still has some problems in terms of center system that need to be solved: Centers are mainly divided into two categories: fixed centers and rotating centers. Although fixed centers have a simple structure and good rigidity and are suitable for high-precision machining, they generate large frictional resistance and serious heat generation due to the use of sliding friction. Long-term use may lead to burns on the workpiece surface or increased dimensional errors, which seriously affect the machining quality.

[0004] In contrast, rotary centers, which use rolling or sliding bearings, have advantages such as low friction and good heat dissipation, making them particularly suitable for high-speed machining. However, the passive rotation of these centers within the sleeve leads to increased bearing wear over long-term operation, necessitating a lubrication system to maintain normal operation. Current solutions involve installing oil passages inside and outside the center, injecting lubricating oil through grease fittings to reduce wear. However, this approach faces several challenges in practical applications: First, metal chips and dust splashed during milling easily clog the grease fittings, leading to lubrication failure and accelerated bearing wear. Second, frequent machine shutdowns are required to clean the grease fittings or replace the lubrication system, reducing production efficiency and increasing labor costs. More seriously, chips mixed with lubricating oil not only reduce lubrication effectiveness but may also enter the bearing, causing scratches or even seizure.

[0005] These problems seriously affect the operational stability and machining accuracy of the equipment, and may even cause the center to jam due to lubrication failure, resulting in serious consequences such as workpiece scrap or equipment damage.

[0006] Furthermore, during continuous milling, the contact surface between the center and the output shaft gradually develops process-related damage holes due to friction. This phenomenon triggers a chain reaction: as the center penetrates deeper into the workpiece, the lubrication path of the external grease nipple is blocked, preventing the lubricating oil from effectively reaching the critical contact area, resulting in a significant decrease in lubrication efficiency. At the same time, the internal oil circuit system faces an even more severe challenge—the deeper penetration of the center makes it easier for metal debris to accumulate in the confined space, not only causing blockage of the oil circuit channels but also forming abrasive wear under high-pressure conditions, causing irreversible damage to the bearing raceway. This self-reinforcing vicious cycle significantly accelerates the failure process of the lubrication system, ultimately leading to serious consequences such as bearing seizure or damage to precision mating surfaces.

[0007] Therefore, this invention proposes a high-precision milling forming device for power output shafts. Summary of the Invention

[0008] The purpose of this invention is to provide a high-precision milling and forming equipment for power output shafts to solve the problems mentioned in the background art.

[0009] To achieve the above objectives, the present invention provides the following technical solution: a high-precision milling forming device for a power output shaft, comprising a milling machine tool, wherein a rotating center is mounted on the surface of the milling machine tool, and a plurality of lubrication cavities are arranged in a ring at equal intervals on the outer surface of the rotating center. An oil storage cavity communicating with the lubrication cavities is provided at the rear end of the rotating center, the oil storage cavity stores lubricating oil, a closing member is installed inside the oil storage cavity, a locking sleeve is mounted on the outer surface of the rotating center, and an oil storage strip is provided inside the lubrication cavity. The oil storage strip is made of sponge material, specifically polyurethane sponge.

[0010] Preferably, the surface of the milling machine tool is respectively equipped with a clamping mechanism, a bearing table, and a milling mechanism, wherein the clamping mechanism is specifically a three-jaw chuck.

[0011] Preferably, the rotating tip is rotatably connected to the inside of the support platform.

[0012] Preferably, the lubrication cavity includes oil seepage holes arranged linearly and equidistantly on the sharp end of the rotating tip.

[0013] Preferably, the lubrication cavity further includes a clamping hole at its front end, a curved cavity communicating with the interior of the oil storage cavity at its rear end, and a clamping bent portion fixedly connected to the middle of the lubrication cavity.

[0014] Preferably, the closure includes two fixed rods fixedly connected inside the oil storage cavity, and a closing plate is slidably connected between the fixed rods. Springs are fixedly connected to the inner wall of the oil storage cavity and the surface of the closing plate.

[0015] Preferably, the locking sleeve is slidably connected to the surface of the rotating tip and is sealed off from the outside by bolts.

[0016] Preferably, the curved cavity continuously contracts inward toward the side closer to the center of the oil storage cavity.

[0017] Preferably, an oil injection plug is installed on the surface of the rotating tip. The oil injection plug is used to seal the inside of the oil reservoir and to add lubricating oil to the oil reservoir by removing the oil injection plug.

[0018] Preferably, the oil seepage hole is located on the side of the sharp end of the rotating tip near the closure member.

[0019] Compared with the prior art, the beneficial effects of the present invention are: 1. By using an oil reservoir bar, combined with a unique lubrication chamber, oil storage chamber, and closure structure, this device differs from existing advanced lubrication systems that are prone to lubrication failure due to metal chips and dust clogging the oil nozzles. In this device, the oil reservoir bar is located inside the lubrication chamber, and the main channel connecting it to the outside is only the oil seepage hole, which greatly reduces the risk of debris entering. At the same time, the oil reservoir bar itself can also block debris, reducing the possibility of lubrication failure and effectively ensuring the stability of equipment operation.

[0020] 2. The closing mechanism in the equipment can automatically adjust the lubricating oil flow rate according to different processing stages. In the initial processing stage, the rotating center and the output shaft are in point contact, the closing plate is subjected to a large centrifugal force, the opening degree of the cavity reaches its maximum, and the lubricating oil is injected quickly to quickly wet the oil storage strip, which is the basis for subsequent lubrication. As processing progresses, the contact state changes to surface contact, the centrifugal force decreases, the closing plate retracts, the opening degree of the cavity decreases, the lubricating oil flow rate is controlled, and it is continuously supplied through the narrow slit channel. Under the assistance of centrifugal force, an oil film is formed, which not only meets the lubrication needs of different stages, but also avoids excessive waste of lubricating oil, and achieves precise and efficient lubrication.

[0021] 3. The oil reservoir bar is made of polyurethane sponge, which has excellent deformability and can easily adapt to the complex and narrow space inside the lubrication chamber, ensuring the storage and transmission effect of lubricating oil. Its excellent oil absorption performance can absorb a large amount of lubricating oil and evenly release it to key contact parts during equipment operation to ensure lubrication needs. Moreover, polyurethane sponge is resistant to high temperature and can function stably in the temperature environment of milling. From a cost perspective, the material is relatively inexpensive. When the oil absorption efficiency of the oil reservoir bar decreases and needs to be replaced regularly, the replacement cost is within an acceptable range, effectively balancing the relationship between equipment maintenance costs and operating performance.

[0022] 4. The special structural design of each part of the lubrication chamber plays a key role in the installation and stability of the oil reservoir strip. The diameter of the bend and the clamping hole is smaller than the diameter of the lubrication chamber, which facilitates stable position control through the deformation of the oil reservoir strip. After installation, the squeezing effect of the clamping bend on the oil reservoir strip further enhances the friction between the oil reservoir strip and the inner wall of the lubrication chamber. Even when the rotating tip generates strong centrifugal force at high speed, the oil reservoir strip can still be stably fixed in the lubrication chamber without displacement or falling off, ensuring the reliability of the lubrication system.

[0023] 5. The oil seepage hole not only plays an important role in providing lubricating oil to the rotating center and output shaft, but also isolates most debris to a certain extent. For the tiny debris that inevitably enters the oil reservoir, the sponge-like porous structure inside the oil reservoir will trap the debris in the pores. Furthermore, the oil reservoir is designed to be replaceable, so the debris will be removed simultaneously when it is taken out, further reducing the steps of cleaning debris, preventing debris from entering the oil reservoir and bearing, reducing wear on the equipment, and extending the service life of the equipment.

[0024] 6. Existing technologies suffer from the problem that as the tip penetrates deeper into the workpiece, the lubrication path is blocked, and the lubricating oil cannot effectively reach the critical contact area. However, this equipment, through a reasonable structural design, allows the lubricating oil to enter the lubrication chamber through the oil storage chamber and the curved chamber, and then be thrown out to the critical parts through the oil seepage hole by the oil storage bar, thus achieving effective lubrication of the critical parts and solving the problem of blocked lubrication path. Furthermore, by lubricating the surface, the lubricating oil is focused on the critical parts, which can also reduce the consumption of lubricating oil and improve the lubrication efficiency.

[0025] 7. The lubrication system of this equipment can effectively reduce friction between the rotating center and the output shaft, reduce wear, ensure machining accuracy, and avoid serious consequences such as center jamming due to lubrication failure, which could lead to workpiece scrap or equipment damage. This ensures the machining quality of the workpiece, improves the product qualification rate, and reduces unnecessary losses.

[0026] 8. The lubrication system achieves anti-splash function through optimization of fluid dynamic parameters: by using the centrifugal force formula a=ω²r and the surface tension balance equation, combined with the matching design of the oil seepage hole diameter, lubricating oil viscosity and the rotation speed of the rotating tip, the lubricating oil is thrown out to form a continuous oil film instead of discrete droplets. Attached Figure Description

[0027] Figure 1 This is a frontal perspective three-dimensional schematic diagram of the main structure of the present invention; Figure 2 For the present invention Figure 1 Enlarged 3D schematic diagram of the structure at point A in the middle; Figure 3 This is a front view of the main structure of the present invention; Figure 4This is a three-dimensional schematic diagram of the rotating tip of the present invention; Figure 5 This is a partial cross-sectional perspective view of the rotating tip of the present invention; Figure 6 For the present invention Figure 5 Enlarged 3D schematic diagram of the structure at point B; Figure 7 This is a partial cross-sectional perspective view of the lubrication cavity of the present invention; Figure 8 For the present invention Figure 7 Enlarged 3D schematic diagram of the structure at point C; Figure 9 For the present invention Figure 7 Enlarged 3D schematic diagram of the structure at point D; Figure 10 This is a three-dimensional schematic diagram of the locking sleeve of the present invention when it is opened.

[0028] In the picture: 11. Milling machine tool; 12. Rotary center.

[0029] 21. Lubrication chamber; 211. Oil seepage hole; 212. Clamping hole; 213. Bending cavity; 214. Clamping bend; 22. Oil reservoir; 23. Closing element; 231. Fixing rod; 232. Closing plate; 233. Spring; 24. Locking sleeve; 25. Oil reservoir bar. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0031] It should be noted that the clamping mechanism only provides clamping function for the output shaft, the milling mechanism only provides milling function for the output shaft, the bearing table only provides feeding function for the rotary center 12, and the external clamping device only provides disassembly and assembly function for the oil reservoir 25. The working principle and specific structure of the above structures are all existing technologies. Therefore, given the universality of the above structures, their specific principles will not be described in detail below.

[0032] Please refer to the example below. Figures 1 to 10As shown, the present invention provides an embodiment: a high-precision milling and forming equipment for power output shaft, including a milling machine tool 11, a rotating center 12 is mounted on the surface of the milling machine tool 11, a plurality of lubrication cavities 21 are arranged in a ring at equal intervals on the outer surface of the rotating center 12, an oil storage cavity 22 communicating with the lubrication cavity 21 is provided at the rear end of the rotating center 12, the oil storage cavity 22 stores lubricating oil, a closing member 23 is installed inside the oil storage cavity 22, a locking sleeve 24 is mounted on the outer surface of the rotating center 12, and an oil storage strip 25 is provided inside the lubrication cavity 21. The oil storage strip 25 is made of sponge material, specifically polyurethane sponge. It should be noted that, firstly, polyurethane foam has good deformability. During installation, due to the complex internal structure of the lubrication cavity 21, which contains narrow spaces such as the curved cavity 213 and the clamping hole 212, the deformability of polyurethane foam allows it to be easily inserted into the corresponding position under the operation of the external clamping equipment and adapt to the shape of these spaces. Under the centrifugal force generated by the high-speed rotation of the rotating tip 12 and the compression of the clamping bend 214, it can undergo a certain degree of deformation, closely fitting the inner wall of the lubrication cavity 21, ensuring that the storage and transmission of lubricating oil are not affected.

[0033] Secondly, its oil absorption performance is excellent. The polyurethane sponge has a rich porous structure, which provides a huge specific surface area, enabling it to absorb a large amount of lubricating oil. During equipment operation, it can quickly absorb the lubricating oil flowing from the oil storage chamber 22 into the lubrication chamber 21 through the bend 213, and under the action of centrifugal force, it evenly releases the lubricating oil through the oil seepage hole 211 to the key contact parts of the rotating tip 12 and the output shaft, effectively ensuring the lubrication needs of the equipment.

[0034] Meanwhile, during milling, the contact area between the rotary center 12 and the output shaft will generate heat due to friction. In milling, the temperature environment of the rotary center 12 is usually below 120℃, while polyurethane foam can withstand high temperatures of 100-150℃ and will not easily decompose or carbonize. It can stably perform the functions of oil absorption and oil storage, ensuring the normal operation of the lubrication system.

[0035] Finally, from a cost perspective, polyurethane foam is relatively inexpensive. During the use of the equipment, the oil storage strip 25 will experience a decrease in oil absorption efficiency over time and with the increase in the number of oil absorptions, requiring regular replacement. The low cost of polyurethane foam keeps the replacement cost within an acceptable range. This advantage ensures efficient lubrication and stable operation of the equipment while also taking into account economy, effectively balancing the relationship between equipment maintenance costs and operating performance.

[0036] The surface of the milling machine tool 11 is respectively equipped with a clamping mechanism, a bearing table and a milling mechanism. The clamping mechanism is specifically a three-jaw chuck, and the rotary center 12 is rotatably connected to the inside of the bearing table.

[0037] The lubrication cavity 21 includes oil seepage holes 211 arranged linearly and equidistantly on the sharp end of the rotating tip 12. The lubrication cavity 21 also includes a clamping hole 212 at its front end. The rear end of the lubrication cavity 21 is provided with a curved cavity 213 that communicates with the interior of the oil storage cavity 22. A clamping bent part 214 is fixedly connected to the middle of the lubrication cavity 21. It should be noted that the special structural design of each part of the lubrication cavity 21 plays a key role in the installation and stability of the oil reservoir 25. Since the diameter of the bending cavity 213 and the clamping hole 212 is smaller than the diameter of the lubrication cavity 21, when installing the oil reservoir 25, external gripping equipment such as tweezers is used to accurately insert both ends of the oil reservoir 25 into the bending cavity 213 and the clamping hole 212 respectively. Thus, the deformation of the oil reservoir 25 achieves stable control of its position. After the oil reservoir 25 is installed in place, the clamping bending part 214 will also exert a certain squeezing effect on the oil reservoir 25. This compression enhances the friction between the oil reservoir 25 and the inner wall of the lubrication chamber 21. Even when the rotary tip 12 rotates at high speed and generates strong centrifugal force, the oil reservoir 25 can still be stably fixed inside the lubrication chamber 21 and will not be displaced or fall off due to centrifugal force. At the same time, the oil seepage hole 211 not only plays an important role in providing lubricating oil to the rotary tip 12 and the output shaft, but also provides convenience for installing and adjusting the oil reservoir 25. When it is necessary to adjust the state of the oil reservoir 25 in the clamping hole 212, the operator can use tweezers to insert into the lubrication chamber 21 through the oil seepage hole 211 to make fine adjustments to the oil reservoir 25 to ensure that it is in the best working condition. In addition, most of the debris has been isolated by the oil seepage hole 211, but some small debris still inevitably enters the oil reservoir 25. Thanks to its internal sponge-like porous structure, the small debris will be stuck in the pores of the oil reservoir 25. The oil reservoir 25 is a replaceable design, and when the oil reservoir 25 is removed, the small debris on it will also be removed at the same time, thereby further reducing the steps of cleaning debris.

[0038] The closure 23 includes two fixed rods 231 fixedly connected inside the oil storage chamber 22. A closing plate 232 is slidably connected between the fixed rods 231. A spring 233 is fixedly connected to the inner wall of the oil storage chamber 22 and the surface of the closing plate 232. It should be noted that when the rotating tip 12 contacts the output shaft and begins to rotate, the closing member 23 will generate centrifugal force. In the initial processing stage, the rotary center 12 is in point contact with the output shaft. At this time, the closed plate 232 is significantly subjected to centrifugal force. During this stage, the closed plate 232 overcomes the tension of the spring 233 under the action of large centrifugal force and is thrown outward to the edge limit position of the oil storage cavity 22. The opening degree of the curved cavity 213 reaches the maximum value. The lubricating oil in the oil storage cavity 22 is quickly injected into the lubrication cavity 21 through the fully opened curved cavity 213, so that the oil storage strip 25 is quickly wetted, which is the basis for subsequent lubrication. As processing progresses, the rotating center 12 gradually extends into the output shaft hole, and the contact state changes from point contact to surface contact. The centrifugal force on the closing plate 232 decreases, and at this time, the spring force 233 becomes dominant. The closing plate 232 retracts towards the center of the oil storage chamber 22, and the opening degree of the curved cavity 213 decreases. The flow rate of lubricating oil is controlled and continuously supplied through the narrow slit channel. Under the assistance of centrifugal force, an oil film is formed, which not only isolates the contact of the friction pairs but also avoids excessive splashing and waste of lubricating oil.

[0039] The locking sleeve 24 is slidably connected to the surface of the rotating tip 12 and is sealed off from the outside by bolts.

[0040] The curved cavity 213 continuously contracts inward toward the side closer to the center of the oil storage cavity 22; It should be noted that during equipment operation, the lubricating oil inside the oil storage chamber 22 tends to accumulate at the edge of the oil storage chamber 22 due to centrifugal force. The design of the curved cavity 213, which continuously contracts towards the center of the oil storage chamber 22, effectively prevents excessive lubricating oil from entering the curved cavity 213. When the lubricating oil accumulates towards the edge of the oil storage chamber 22 under centrifugal force, the contraction structure of the curved cavity 213 restricts the flow of lubricating oil, achieving micro-control of the amount of lubricating oil entering the lubrication chamber 21. This avoids excessive lubricating oil entering, which would cause the oil storage strip 25 to become overly wet and waste lubricating oil. At the same time, it also ensures that the lubricating oil forms a stable and appropriate amount of oil film at the key parts of the rotating tip 12, ensuring good lubrication effect.

[0041] An oil filler plug is installed on the surface of the rotating tip 12. The oil filler plug is used to seal the inside of the oil reservoir 22 and to add lubricating oil into the oil reservoir 22 by removing the oil filler plug.

[0042] The oil leakage hole 211 is located on the side of the sharp end of the rotating tip 12 near the closing member 23; It should be noted that this design not only achieves lubrication of the key parts of the rotary tip 12 and the output shaft, but also reduces the weakening of the strength of the rotary tip 12. The rotary tip 12 needs to withstand a large amount of pressure and torque during operation. If holes are randomly opened in its structure, it will reduce its overall strength, affect its service life and machining accuracy. However, the oil seepage hole 211 is opened on the side close to the closing member 23, avoiding the key area of ​​the rotary tip 12 under stress, minimizing the impact on the strength of the rotary tip 12. At the same time, this position can ensure that the lubricating oil can reach the parts that need lubrication more efficiently through the oil seepage hole 211 under the action of centrifugal force, thereby improving lubrication efficiency.

[0043] The oil reservoir 25 can be disassembled and assembled using an external gripping device, such as tweezers.

[0044] The lubricating oil is an industrial lubricating oil with a viscosity grade of ISO VG32. The thickness of the oil reservoir 25 matches the depth of the lubrication cavity 21. The pore diameter of the oil reservoir 25 (e.g., 50-100μm) is smaller than the particle size of common metal debris (e.g., 100-200μm).

[0045] The following is the specific work process: Place the power output shaft on the equipment and secure it using the rotary center 12 and the three-jaw chuck. Then start the milling mechanism. During the milling process, the rotary center 12 contacts the output shaft and rotates accordingly.

[0046] As the rotary tip 12 rotates, the closure member 23 installed in the oil storage chamber 22 generates centrifugal force. Under the action of centrifugal force, the closing plate 232 in the closure member 23 is thrown to the outer edge of the oil storage chamber 22. At this time, the spring 233 connecting the inner wall of the oil storage chamber 22 and the closing plate 232 contracts, and the closing plate 232 no longer blocks the curved cavity 213. The lubricating oil in the oil storage chamber 22 enters the lubrication chamber 21 through the curved cavity 213, thereby wetting the oil storage strip 25 located inside the lubrication chamber 21.

[0047] In the initial stage, there is little lubricating oil in the oil reservoir 25, and only a small amount of lubricating oil can be thrown out through the oil seepage hole 211 under the action of centrifugal force. As the equipment continues to run, the heat and pressure generated by milling will gradually form process damage holes on the contact surface between the rotary center 12 and the output shaft. At the same time, the rotary center 12 gradually penetrates into the workpiece under the movement of the support table.

[0048] During this process, the oil reservoir 25 continuously absorbs lubricating oil and gradually becomes completely wetted to a saturated state. When the oil reservoir 25 is saturated, the lubricating oil inside is more easily ejected. At the same time, due to the saturated state of the oil reservoir 25, its lubricating oil absorption effect will be greatly reduced, thus ensuring that the amount of lubricating oil used is not excessively wasted while keeping itself moist.

[0049] Because the lubrication chamber 21 is blocked by the locking sleeve 24, the lubricating oil can only be thrown out through the oil seepage hole 211. The thrown-out lubricating oil enters the hole of the output shaft and the surface of the rotating center 12, thereby achieving lubrication of key parts, effectively reducing friction, reducing wear, and ensuring machining accuracy and equipment operation stability.

[0050] It should be noted that the splashing behavior of the lubricating oil is controlled by the combined effects of centrifugal force and surface tension: when the rotating tip 12 rotates at a speed of n (rpm), the centrifugal acceleration of the lubricating oil at the outlet of the oil seepage hole 211 is a=ω²r, where ω=2πn / 60, and r is the distance from the center of the oil seepage hole to the axis of the rotating tip 12. Taking ISOVG32 lubricating oil (kinematic viscosity 32mm² / s, surface tension 0.03N / m) as an example, when n=3000rpm and r=50mm, the centrifugal acceleration a≈5000m / s². At this time, the droplets formed by the lubricating oil at the outlet of the oil seepage hole 211 need to overcome the surface tension F=σ・2πd (d is the diameter of the oil seepage hole, taken as 0.5mm) to splash.

[0051] Calculations show that the ratio of centrifugal force F_centrifugal = ma (where m is the droplet mass) to surface tension is F_centrifugal / F≈120. This ratio causes the lubricating oil to be ejected as a thin film rather than as discrete droplets. In addition, the oil seepage hole 211 is designed as a micropore with a diameter of 0.3-0.5 mm. At the same time, under the action of centrifugal force, the lubricating oil forms a continuous oil film with a thickness of δ=0.1-0.2 mm along the hole wall. The stability of the oil film can be verified by the formula δ=√(2σ / (ρa)) (where ρ is the density of the lubricating oil), ensuring that the ejected lubricating oil only adheres to the contact area between the rotating tip 12 and the output shaft and will not splash into the processing area.

[0052] When the lubricating oil enters the output shaft hole and the surface of the rotating tip 12, it solves the problem of blocked lubrication path in the existing technology. Furthermore, by lubricating the surface, the lubricating oil is focused on the key parts, which can also reduce the consumption of lubricating oil.

[0053] It should be noted that, firstly, the oil reservoir 25 is located inside the lubrication chamber 21, and the only main channel connecting it to the outside is the oil seepage hole 211. This greatly reduces the risk of blockage caused by splashing metal chips and dust during milling. On the one hand, the space available for chips to enter is small; on the other hand, the oil reservoir 25 itself can also prevent chips from continuing to enter the oil reservoir 22. Specifically, the saturated oil reservoir 25 expands in volume, which means that even if some chips enter the lubrication chamber 21, they will be blocked by the oil reservoir 25, thereby reducing the possibility of lubrication failure.

[0054] Secondly, after the oil storage bar 25 throws out some lubricating oil due to centrifugal force and saturation, it is no longer saturated and can continue to absorb the lubricating oil in the oil storage chamber 22, continuously lubricating the rotating tip 12.

[0055] In addition, when the milling is finished, the rotary center 12 stops rotating, and the closed plate 232, which loses centrifugal force, will reset under the elastic force of the spring 233, re-seal the curved cavity 213, and block the oil reservoir 25 from absorbing lubricating oil.

[0056] Finally, as processing continues, if the oil reservoir 25 reduces its oil absorption efficiency due to continuous absorption of lubricating oil, the operator can slide the locking sleeve 24 to expose the oil reservoir 25 to the outside, then use tweezers or other external gripping equipment to remove it and replace it with a new oil reservoir 25. Subsequently, the locking sleeve 24 is slid in the opposite direction and locked with bolts to ensure that the equipment can operate continuously and stably, meeting the processing requirements of high-precision milling of the power output shaft. This effectively solves many problems faced by existing top-level lubrication systems and improves the stability of equipment operation and processing accuracy.

[0057] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, 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 a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0058] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-precision milling forming device for a power output shaft, comprising a milling machine tool (11), wherein a rotating center (12) is mounted on the surface of the milling machine tool (11), characterized in that: The outer surface of the rotating tip (12) is provided with a number of lubrication chambers (21) arranged in a ring at equal intervals. The rear end of the rotating tip (12) is provided with an oil storage chamber (22) that communicates with the lubrication chambers (21). The oil storage chamber (22) stores lubricating oil. A closure (23) is installed inside the oil storage chamber (22). A locking sleeve (24) is installed on the outer surface of the rotating tip (12). An oil storage strip (25) is provided inside the lubrication chamber (21). The oil storage strip (25) is made of sponge material.

2. The high-precision milling and forming equipment for power output shaft according to claim 1, characterized in that: The milling machine tool (11) is equipped with a clamping mechanism, a bearing table and a milling mechanism on its surface.

3. The high-precision milling and forming equipment for a power output shaft according to claim 1, characterized in that: The rotating tip (12) is rotatably connected to the inside of the support platform.

4. The high-precision milling and forming equipment for power output shaft according to claim 1, characterized in that: The lubrication cavity (21) includes oil seepage holes (211) arranged linearly and equidistantly on the sharp end of the rotating tip (12).

5. The high-precision milling forming equipment for power output shaft according to claim 4, characterized in that: The lubrication cavity (21) also includes a clamping hole (212) at its front end, and a curved cavity (213) communicating with the inside of the oil storage cavity (22) is provided at the rear end of the lubrication cavity (21). A clamping bent part (214) is fixedly connected to the middle part of the lubrication cavity (21).

6. The high-precision milling forming equipment for power output shaft according to claim 1, characterized in that: The closure (23) includes two fixed rods (231) fixedly connected inside the oil storage chamber (22), and a closing plate (232) is slidably connected between the fixed rods (231). Springs (233) are fixedly connected to the inner wall of the oil storage chamber (22) and the surface of the closing plate (232).

7. The high-precision milling and forming equipment for power output shaft according to claim 1, characterized in that: The locking sleeve (24) is slidably connected to the surface of the rotating tip (12) and is sealed off from the outside by bolts.

8. The high-precision milling forming equipment for power output shaft according to claim 5, characterized in that: The curved cavity (213) continuously contracts inward toward the side closer to the center of the oil storage cavity (22).

9. The high-precision milling forming equipment for power output shaft according to claim 1, characterized in that: The rotating tip (12) is equipped with an oil plug, which is used to seal the inside of the oil reservoir (22) and to add lubricating oil to the oil reservoir (22) by removing the oil plug.

10. A high-precision milling forming equipment for a power output shaft according to claim 4, characterized in that: The oil seepage hole (211) is located on the side of the sharp end of the rotating tip (12) near the closure (23).

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