A motor rotating shaft keyway milling device

Abstract

The application relates to a motor rotating shaft key groove milling device and belongs to the technical field of milling equipment. The application comprises a rack, a milling cutter assembly for milling a rotating shaft is arranged on the rack, the milling cutter assembly comprises a milling cutter shaft and a milling cutter sleeved on the milling cutter shaft and prevented from rotating, a cleaning mechanism is further arranged on the rack, the cleaning mechanism comprises a cleaning shaft, a cleaning disc and a reciprocating moving mechanism, the cleaning shaft is arranged on the side of the milling cutter shaft in parallel to the milling cutter shaft, the milling cutter shaft is located on the side of the milling cutter away from the rotating shaft to be milled, the cleaning disc is slidably sleeved on the cleaning shaft along the axis of the cleaning shaft, the cleaning disc is prevented from rotating relative to the cleaning shaft, a plurality of cleaning teeth are uniformly arranged on the outer periphery of the cleaning disc, the shape of the cleaning teeth is matched with the shape of the space between the milling cutter teeth, cleaning cotton is arranged on the outer periphery of the cleaning teeth, and the reciprocating moving mechanism is in transmission connection with the cleaning disc so as to drive the cleaning disc to reciprocate along the axis of the cleaning shaft. The application can clean the cuttings which are stuck in the space between the milling cutter teeth.

Description

Technical Field

[0001] This invention relates to the field of milling equipment technology, and in particular to a keyway milling device for motor shafts. Background Technology

[0002] Electric motors, as crucial power components in industrial production equipment, are widely used in mechanical transmissions, automated equipment, and various processing devices. The motor shaft, as a vital part of the motor's output power, typically requires keyways to connect with couplings, gears, and other transmission components to transmit power. The machining accuracy of the keyways directly affects the reliability of the connection between the shaft and the mating components. Therefore, during the manufacturing process of motor shafts, milling equipment is usually used to machine the keyways on the outer circumference of the shaft.

[0003] Existing keyway milling devices for motor shafts typically employ rotary milling cutters to cut the shaft. During high-speed rotation, the milling cutter's teeth continuously contact the shaft and remove material, thus forming the desired keyway structure. For example, patent CN210967149U discloses a milling machine for milling the three end faces of a hinge shaft. This milling machine includes a frame, two first milling cutters, one second milling cutter, and a worktable. The worktable is equipped with a clamping device for clamping the hinge shaft. The clamping device includes a clamping mechanism, which comprises two positioning frames positioned on either side of the second milling cutter's axis. Each positioning frame includes a first jaw, a second jaw, and a base. The base is connected to the worktable, and the first jaws are fixedly connected to the base. The lines connecting the two first jaws and the two second jaws are parallel to the axis of the first milling cutter. The second jaw slides along a direction perpendicular to the axis of the first milling cutter, and the first jaw, second jaw, and base form a U-shaped clamping groove.

[0004] This milling machine uses a milling cutter to mill the hinge shaft. However, during actual machining, metal chips generated by the milling cutter enter the gap between adjacent teeth as the milling cutter rotates. Due to the small gap between the teeth and the influence of cutting pressure, temperature, and workpiece material properties during the cutting process, some metal chips easily become embedded in the tooth gap and form a strong adhesion to the milling cutter surface, making it difficult for them to be automatically discharged as the milling cutter rotates.

[0005] Existing technologies typically use cutting fluid flushing or compressed air purging to clean end mills, using the fluid or airflow to remove chips adhering to the end mill surface. However, these cleaning methods mainly target the outer surface of the end mill or the opening of the tooth gap. For metal chips deeply embedded within the tooth gap, the fluid or airflow is insufficient to provide adequate cleaning due to the obstruction of the tooth structure and the chip's own clamping effect, resulting in some chips remaining within the tooth gap.

[0006] When residual metal debris accumulates, it gradually reduces the chip clearance between the cutting teeth, affecting the milling cutter's chip removal ability and increasing resistance during the cutting process. This leads to higher milling temperatures and accelerated cutter wear. Furthermore, chip accumulation can cause instability in the milling cutter's cutting state, impacting the dimensional accuracy and surface quality of the machined keyways. Summary of the Invention

[0007] This invention provides a keyway milling device for motor shafts to solve the technical problem in the prior art that it is difficult to clean metal debris that is deeply stuck in the gap between the milling cutter teeth during use, thus affecting the working performance of the milling cutter.

[0008] To solve the above problems, the present invention provides a keyway milling device for motor shafts, which adopts the following technical solution: A keyway milling device for a motor shaft includes a frame on which a milling cutter assembly for milling the shaft is mounted. The milling cutter assembly includes a milling cutter shaft and a milling cutter mounted on the milling cutter shaft to prevent rotation. The frame also includes a cleaning mechanism, which includes a cleaning shaft, a cleaning disc, and a reciprocating mechanism. The cleaning shaft is parallel to the milling cutter shaft and located beside it, with the milling cutter shaft positioned on the side of the milling cutter facing away from the motor shaft to be milled. The cleaning disc is slidably mounted on the cleaning shaft and is anti-rotating relative to the cleaning shaft. The outer circumference of the cleaning disc is evenly distributed with… It is equipped with multiple cleaning teeth, the shape of which is adapted to the shape of the tooth spacing in the milling cutter. The outer periphery of the cleaning teeth is provided with cleaning cotton. The reciprocating movement mechanism is connected to the cleaning disc drive to drive the cleaning disc to move back and forth along the axial direction of the cleaning shaft. The cleaning disc rotates in the opposite direction to the milling cutter. During the rotation, along the projection direction of the milling cutter axis, each cleaning tooth is sequentially adapted to and embedded in the corresponding tooth spacing. The reciprocating movement mechanism drives the cleaning disc to drive the cleaning teeth to reciprocate through the tooth spacing of the milling cutter along the axial direction to remove metal debris in the tooth spacing.

[0009] By adopting the above technical solution, a cleaning mechanism is installed on the frame, and a cleaning disc is slidably mounted on a cleaning shaft. The cleaning shaft drives the cleaning disc to rotate, and a reciprocating mechanism drives the cleaning disc to move back and forth along the cleaning shaft axis. This allows the cleaning teeth on the cleaning disc to sequentially engage with the tooth gaps of the milling cutter during rotation and reciprocate along the tooth gap direction. This actively removes metal debris stuck inside the tooth gaps, preventing the continuous accumulation of metal debris from affecting the milling cutter's chip-holding capacity and cutting performance. By setting the cleaning teeth to match the shape of the tooth gaps, it is ensured that the cleaning teeth can smoothly enter the tooth gaps, reducing the possibility of interference between the cleaning teeth and the milling cutter. Dynamic cleaning of the milling cutter is achieved during continuous milling, reducing processing interruptions caused by machine stoppages for cleaning debris, and improving the continuity and efficiency of keyway machining on the motor shaft. Simultaneously, cleaning cotton is placed on the outer periphery of the cleaning teeth, which further wipes away fine debris adhering to the tooth surface as the cleaning teeth pass through the tooth gaps, improving the cleaning effect of the milling cutter.

[0010] Furthermore, chamfers are provided between the two tooth end faces of the cleaning tooth and the side wall of the cleaning tooth.

[0011] By adopting the above technical solution, a chamfer is set between the two tooth end faces of the cleaning tooth and the side wall of the cleaning tooth, so that the cleaning tooth can form a guiding transition when it enters the tooth gap of the milling cutter, reducing the possibility of collision between the edge of the cleaning tooth and the milling cutter tooth, allowing the cleaning tooth to be inserted into the tooth gap more smoothly, improving the stability of the cleaning disc and the milling cutter during the cooperation process, while reducing the jamming phenomenon caused by assembly errors or movement deviations, and extending the service life of the cleaning tooth and the milling cutter.

[0012] Furthermore, the cleaning disc is provided with multiple lubricant channels as many as the cleaning teeth, and each cleaning tooth has a lubricant outlet on its side edge. Each lubricant channel is connected to each lubricant outlet. The cleaning mechanism also includes a lubricant storage cavity containing lubricant. The inlet of each lubricant channel is connected to the lubricant storage cavity, and the lubricant in the lubricant storage cavity can flow through each lubricant channel and be squeezed out from the lubricant outlet.

[0013] By employing the above technical solution, lubricant channels are set on the cleaning disc, and each lubricant channel is connected to the lubricant outlet on the corresponding cleaning tooth. This allows the lubricant in the lubricant storage chamber to be transported to the cleaning tooth position through the lubricant channels and discharged from the lubricant outlet. When the cleaning tooth enters the gap between the milling cutter teeth for cleaning, the lubricant can simultaneously act on the contact area between the cleaning tooth and the milling cutter, reducing the frictional resistance between them, reducing wear generated during the cleaning process, and helping to soften or wet the metal debris adhering to the gap between the teeth, improving the debris removal effect, and further improving the milling cutter cleaning efficiency.

[0014] Furthermore, the lubricant outlet is a cutout located between the two end faces of the cleaning tooth and parallel to the end faces of the cleaning tooth, and the cleaning cotton is arranged around the side edge of the cleaning tooth and covers the cutout.

[0015] By adopting the above technical solution, the lubricant outlet is set as a cut located between the two end faces of the cleaning tooth and parallel to the end faces of the cleaning tooth. The lubricant outlet is covered with cleaning cotton, so that the lubricant can slowly seep out through the cleaning cotton and act evenly on the periphery of the cleaning tooth, avoiding the waste caused by the lubricant being sprayed out in large quantities directly.

[0016] Furthermore, the cleaning mechanism also includes a cleaning cover, which is mounted on the frame and covers the outside of the cleaning disc. The cleaning cover has a movable outlet, and the portion of the cleaning disc facing the milling cutter extends through the movable outlet to the outside of the cleaning cover to cooperate with the milling cutter.

[0017] By adopting the above technical solution, and by setting up a cleaning cover that covers the outside of the cleaning disc, the cleaning disc and related transmission structures can be protected, reducing the amount of metal debris generated during milling entering the cleaning mechanism and improving the reliability of the cleaning mechanism. Simultaneously, by providing a movable outlet on the cleaning cover, the portion of the cleaning disc facing the milling cutter can extend outside the cleaning cover and cooperate with the milling cutter, ensuring the normal cleaning function of the cleaning disc while protecting the internal structure of the cleaning mechanism.

[0018] Furthermore, the reciprocating moving mechanism is located inside the cleaning cover. The reciprocating moving mechanism includes two fixed rings, two elastic elements, two pushing rings, and two limiting sleeves. The fixed rings are fixedly fitted onto the cleaning shaft, with the two fixed rings located on opposite sides of the cleaning disc. The two elastic elements are both fitted onto the cleaning shaft and connected to the two opposing side walls of the two fixed rings. The two pushing rings are both anti-rotation fitted onto the cleaning shaft and connected to the opposing ends of the two elastic elements. There is a gap between the cleaning disc and the two pushing rings. The outer wall of the ring is connected with a protrusion. Two limiting sleeves are fixedly installed on the cleaning cover and respectively fitted on the outside of the two push rings. The limiting sleeves are provided with a wave-shaped annular guide groove, which includes multiple reciprocating groove sections. The protrusions on the two push rings are respectively inserted into the annular guide grooves on the two limiting sleeves. When the cleaning shaft rotates, the two annular guide grooves force the two push rings to move alternately toward the other push ring through the protrusions on the two push rings, thereby causing the push rings to push the cleaning disc to move axially reciprocally.

[0019] By adopting the above technical solution, a reciprocating moving mechanism consisting of a fixed ring, an elastic element, a push ring, and a limiting sleeve is set up. The wave-shaped annular guide groove on the limiting sleeve engages with the protrusion on the push ring, enabling the push ring to reciprocate axially during the rotation of the cleaning shaft, thereby pushing the cleaning disc to reciprocate axially along the cleaning shaft. This structure eliminates the need for an additional independent drive device, utilizing the rotational power of the cleaning shaft itself to achieve the axial reciprocating movement of the cleaning disc. This simplifies the cleaning mechanism structure, reduces equipment complexity, and ensures that the cleaning teeth continuously pass through the gaps between the milling cutter teeth, improving the continuity of debris removal.

[0020] Furthermore, the number of cleaning teeth on the cleaning disc is the same as the number of reciprocating grooves in the annular guide groove.

[0021] By adopting the above technical solution, the number of cleaning teeth on the cleaning disc is kept consistent with the number of reciprocating grooves in the annular guide groove. During the rotation of the cleaning disc, the motion state of each cleaning tooth corresponds to the axial reciprocating motion state of the push ring, thereby ensuring that each cleaning tooth can enter the tooth interval of the milling cutter at the corresponding moment, and ensuring that each tooth interval can be cleaned.

[0022] Furthermore, the cleaning disc includes a cleaning sleeve and a cleaning plate fixedly mounted on the outside of the cleaning sleeve. The cleaning teeth are arranged on the outer periphery of the cleaning plate. The lubricant channel includes a transverse channel formed on the sleeve wall of the cleaning sleeve and extending along the axis of the cleaning sleeve, and a radial channel formed on the cleaning plate and extending radially along the cleaning plate and communicating with the transverse channel. The radial channel communicates with the lubricant outlet. There are two lubricant storage cavities, both formed on the cleaning cover. The two lubricant storage cavities are respectively arranged on both sides of the cleaning sleeve. During the process of the cleaning disc being driven to move back and forth along the axis, the two ends of the cleaning sleeve are alternately inserted into the two lubricant storage cavities, thereby squeezing the lubricant into the lubricant channel and discharging the lubricant from the lubricant outlet.

[0023] By adopting the above technical solution, the cleaning disc is configured as a combination of a cleaning sleeve and a cleaning plate. The transverse channel within the cleaning sleeve and the radial channel within the cleaning plate form a lubricant delivery path, ensuring accurate delivery of lubricant to the cleaning teeth. Simultaneously, by providing lubricant storage cavities on both sides of the cleaning cover, and by having the cleaning sleeve alternately inserted into these cavities during the axial reciprocating movement of the cleaning disc, automatic compression and delivery of the lubricant is achieved. This eliminates the need for an additional lubrication drive mechanism, enabling automatic lubrication of the cleaning teeth during operation, reducing structural complexity, and improving lubrication efficiency.

[0024] Furthermore, the cleaning shaft and the milling cutter shaft are connected by a transmission assembly, and the rotation of the milling cutter shaft drives the cleaning shaft to rotate in the opposite direction.

[0025] By adopting the above technical solution, the cleaning shaft and the milling cutter shaft are connected through a transmission assembly. This allows the milling cutter shaft to directly drive the cleaning shaft in the opposite direction when it rotates, thus utilizing the milling cutter's own power to drive the cleaning disc. This eliminates the need for an additional cleaning disc drive device, reducing equipment manufacturing costs and structural complexity. Simultaneously, the milling cutter and cleaning disc operate synchronously, ensuring the cleaning teeth continuously clean at the intervals between the milling cutter teeth, improving the stability of the milling process.

[0026] Furthermore, the rotating shaft positioning and clamping mechanism includes a three-jaw chuck and a push rod. The three-jaw chuck is clamped at one end of the rotating shaft to be processed, and the push rod is axially pushed at the other end of the rotating shaft to be processed.

[0027] By adopting the above technical solution, a shaft positioning and clamping mechanism consisting of a three-jaw chuck and a push rod is set up. The three-jaw chuck clamps one end of the shaft to be machined, and the push rod is used to axially tighten it from the other end. This can improve the stability of the shaft after installation, reduce the possibility of shaft offset or vibration during milling, and thus improve the positioning accuracy and machining quality during keyway machining.

[0028] The beneficial effects of the motor shaft keyway milling device provided by this invention are as follows: By setting up a cleaning mechanism, the cleaning teeth on the cleaning disc can sequentially enter the milling cutter tooth intervals during the milling process and reciprocate axially through the tooth intervals, thereby actively removing metal chips stuck in the tooth intervals and preventing chip accumulation from affecting the milling cutter's chip removal capacity and cutting performance. By setting up a cleaning structure connected to the milling cutter drive, synchronous cleaning can be achieved using the milling cutter's power, reducing the number of equipment downtime maintenance, improving the continuity and efficiency of motor shaft keyway milling, and simultaneously improving the stability and service life of the cleaning mechanism through lubrication and protective structures. Attached Figure Description

[0029] Figure 1 A three-dimensional structural schematic diagram of a keyway milling device for motor shaft provided by the present invention; Figure 2 A front view of a keyway milling device for a motor shaft provided by the present invention; Figure 3 A three-dimensional structural diagram of the milling cutter assembly and cleaning mechanism in a keyway milling device for a motor shaft provided by the present invention; Figure 4 This is a front view of the milling cutter assembly and cleaning mechanism in a keyway milling device for a motor shaft provided by the present invention; Figure 5 for Figure 4 Sectional view at point AA; Figure 6 for Figure 5 Enlarged structural diagram at point B; Figure 7 A three-dimensional structural diagram of the cleaning mechanism in a keyway milling device for motor shafts provided by the present invention after removing the cleaning cover; Figure 8 A front view of the cleaning mechanism in a keyway milling device for motor shafts provided by the present invention after removing the cleaning cover; Figure 9 A projection view of the cleaning disc and milling cutter along the axial direction in a keyway milling device for a motor shaft provided by the present invention; Figure 10 A three-dimensional structural diagram of a cleaning disc in a keyway milling device for a motor shaft provided by the present invention; Figure 11 A cross-sectional view of a cleaning disc in a keyway milling device for a motor shaft provided by the present invention; Figure 12 This is a side sectional view of the cleaning teeth on the cleaning disc in a keyway milling device for a motor shaft provided by the present invention.

[0030] Explanation of reference numerals in the attached figures: 1. Frame; 2. Milling cutter shaft; 3. Cleaning shaft; 4. Milling cutter; 401. Cutting teeth; 402. Cutting tooth spacing; 5. Cleaning disc; 501. Cleaning teeth; 502. Cleaning plate; 503. Cleaning sleeve; 504. Transverse channel; 505. Radial channel; 6. Three-jaw chuck; 7. Motor shaft; 8. Push rod; 9. Cleaning cover; 901. Movable outlet; 902. Lubricant storage chamber; 10. Fixing ring; 11. Elastic element; 12. Pushing ring; 13. Limiting sleeve; 131. Annular guide groove; 14. Cleaning cotton; 15. Protrusion. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Those skilled in the art should understand that the embodiments described below are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0032] The following is one embodiment of a keyway milling device for motor shafts provided by the present invention: like Figures 1-12 As shown, a keyway milling device for motor shaft includes a frame 1, a milling cutter assembly, a cleaning mechanism, and a shaft positioning and clamping mechanism.

[0033] like Figure 1 , Figure 2 As shown, rack 1 is arranged on a horizontal ground to provide a mounting base for each functional component.

[0034] The milling cutter assembly is mounted on the frame 1 and is used to perform keyway machining on the motor shaft 7 to be machined.

[0035] The milling cutter assembly includes a milling cutter shaft 2 and a milling cutter 4. The milling cutter shaft 2 is rotatably mounted on the frame 1, and the milling cutter 4 is fitted on the outside of the milling cutter shaft 2. The milling cutter 4 and the milling cutter shaft 2 are connected by an anti-rotation connection, so that the milling cutter shaft 2 can drive the milling cutter 4 to rotate synchronously when it rotates.

[0036] The milling cutter 4 is a disc milling cutter 4. The outer periphery of the milling cutter 4 is provided with multiple teeth 401 evenly spaced along the circumference, and a tooth spacing 402 is formed between two adjacent teeth 401.

[0037] During the processing, the motor shaft 7 to be processed is fixed on the frame 1 by the shaft positioning and clamping mechanism. The milling cutter shaft 2 drives the milling cutter 4 to rotate at high speed, so that the cutting teeth 401 on the outer periphery of the milling cutter 4 continuously cut the surface of the motor shaft 7, thereby forming a keyway structure.

[0038] The side of the milling cutter 4 facing the motor shaft 7 is the cutting side, and the side of the milling cutter 4 facing away from the motor shaft 7 is the cleaning side. This arrangement allows the cleaning mechanism to be positioned on the non-cutting side of the milling cutter 4, preventing it from interfering with the normal cutting process between the milling cutter 4 and the motor shaft 7.

[0039] like Figures 3-8 As shown, the cleaning mechanism includes a cleaning shaft 3, a cleaning disc 5, a cleaning cover 9, and a reciprocating movement mechanism.

[0040] The cleaning shaft 3 is rotatably mounted on the frame 1. The cleaning shaft 3 is set parallel to the milling cutter shaft 2 and located above the milling cutter shaft 2.

[0041] The cleaning disc 5 is slidably fitted onto the outside of the cleaning shaft 3, and a non-rotation sliding fit is formed between the cleaning disc 5 and the cleaning shaft 3, so that the cleaning disc 5 can rotate synchronously with the cleaning shaft 3 and can reciprocate along the axial direction of the cleaning shaft 3.

[0042] Specifically, the cleaning disc 5 includes a cleaning sleeve 503 and a cleaning plate 502 fixedly fitted on the outside of the cleaning sleeve 503.

[0043] The cleaning sleeve 503 is sleeved on the outside of the cleaning shaft 3. The cleaning sleeve 503 and the cleaning shaft 3 form a non-rotational fit through a spline structure, so that the cleaning shaft 3 can drive the cleaning sleeve 503 to rotate, while allowing the cleaning sleeve 503 to slide along the axial direction of the cleaning shaft 3.

[0044] The cleaning disc 502 has a disc-shaped structure, and multiple cleaning teeth 501 are evenly arranged on the outer periphery of the cleaning disc 502.

[0045] Furthermore, the shape of the cleaning tooth 501 is adapted to the tooth spacing 402. This adaptation means that the cleaning tooth 501 can extend into the corresponding tooth spacing 402. At the same time, a certain gap is maintained between the cleaning tooth 501 and the tooth spacing 402 to avoid interference between the cleaning tooth 501 and the milling cutter 4 during the process of the cleaning tooth 501 entering the tooth spacing 402.

[0046] like Figure 10 , Figure 11 , Figure 12 As shown, the cleaning disc 5 has multiple lubricant channels inside, the number of which is the same as the number of cleaning teeth 501, and the multiple lubricant channels are respectively set to correspond to the multiple cleaning teeth 501.

[0047] Specifically, the sleeve wall of the cleaning sleeve 503 is provided with a transverse channel 504 extending along the axis of the cleaning sleeve 503, and the cleaning plate 502 is provided with a radial channel 505 extending along the radial direction of the cleaning plate 502.

[0048] Each cleaning tooth 501 is provided with a lubricant outlet, which is located between the two end faces of the cleaning tooth 501. The lubricant outlet is a cut structure parallel to the end face of the cleaning tooth 501.

[0049] The cleaning tooth 501 is surrounded by cleaning cotton 14, which is made of a flexible absorbent material and is arranged around the outside of the cleaning tooth 501. The cleaning cotton 14 is glued to the cleaning tooth 501 and covers the outer edge of the lubricant outlet to seal the lubricant outlet.

[0050] One end of the radial channel 505 is connected to the transverse channel 504, and the other end is connected to the lubricant outlet provided on the cleaning tooth 501.

[0051] Through the above configuration, the lubricant can flow along the cleaning sleeve 503, cleaning plate 502, and cleaning teeth 501, and ultimately be delivered to the cleaning teeth 501. When the lubricant is discharged from the lubricant outlet, it first enters the cleaning cotton 14 and diffuses along it. When the cleaning teeth 501 enter the tooth gap 402, the cleaning cotton 14 can absorb and carry the lubricant to contact the inner wall of the tooth gap 402, thereby wiping away the fine metal debris adhering to the surface of the teeth 401 and the inside of the tooth gap 402.

[0052] like Figure 9 As shown, the cleaning disc 5 and the milling cutter 4 form a toothed interlocking fit similar to gear meshing.

[0053] When the cleaning shaft 3 rotates, it drives the cleaning disc 5 to rotate around its own axis. At the same time, the milling cutter shaft 2 also rotates. Observing along the line of the milling cutter shaft 2, each cleaning tooth 501 on the cleaning disc 5 is sequentially embedded into each tooth spacing 402 on the milling cutter 4. The cutting teeth 401 of the milling cutter 4 and the cleaning teeth 501 will not overlap. Therefore, when the cleaning disc 5 moves axially, the cleaning teeth 501 that are inserted into the tooth spacing 402 will pass through the tooth spacing 402 and clean the chips in the tooth spacing 402. There will be no interference between the cutting teeth 401 and the cleaning teeth 501.

[0054] Both end faces of the cleaning tooth 501 and its sidewalls are chamfered. This chamfer creates a guiding structure at the end of the cleaning tooth 501. When the cleaning tooth 501 enters the tooth gap 402, the chamfer guides it smoothly into the gap. Simultaneously, the chamfer reduces the possibility of collision or impact between the end of the cleaning tooth 501 and the milling cutter 4.

[0055] like Figures 5-8 As shown, the reciprocating movement mechanism includes two fixed rings 10, two elastic elements 11, two pushing rings 12, and two limiting sleeves 13.

[0056] Both retaining rings 10 are fixedly fitted onto the cleaning shaft 3, and the two retaining rings 10 are located on both sides of the cleaning disc 5.

[0057] Both elastic elements 11 are sleeved on the outside of the cleaning shaft 3 and are respectively connected to the two opposing side walls of the two fixing rings 10.

[0058] Both push rings 12 are slidably fitted onto the cleaning shaft 3, and an anti-rotation fit is formed between the two push rings 12 and the cleaning shaft 3, allowing the two push rings 12 to rotate synchronously with the cleaning shaft 3. The two push rings 12 are located on opposite sides of the cleaning disc 5, and are respectively connected to the two opposing ends of the two elastic elements 11. The gap between the two push rings 12 is larger than the axial length of the cleaning sleeve 503, resulting in a gap between the two push rings 12 and the cleaning sleeve 503. Figure 7 , Figure 8 As shown, protrusions 15 are connected to the outer walls of both push rings 12.

[0059] The two limiting sleeves 13 are fixed in position and are respectively sleeved on the outside of the two push rings 12.

[0060] The limiting sleeve 13 includes sleeve one and sleeve two. Both sleeve one and sleeve two have a serrated structure on their opposite sides, and there is a gap between the serrated structures on both sides to form a wave-shaped annular guide groove 131.

[0061] Specifically, the annular guide groove 131 includes multiple reciprocating groove sections arranged at intervals along the circumference.

[0062] Each reciprocating groove section has a height variation along the axial direction of the limiting sleeve 13, so that the annular guide groove 131 as a whole forms a continuously changing guide trajectory.

[0063] The reciprocating groove section includes a transverse groove section, an inclined groove section, and a straight groove section connected in sequence. The transverse groove section extends along the axial direction of the limiting sleeve 13, and the straight groove section extends along the circumferential direction of the limiting sleeve 13.

[0064] The protrusions 15 on the two push rings 12 are respectively inserted into the annular guide grooves 131 on the corresponding limiting sleeves 13.

[0065] When the cleaning shaft 3 rotates, the two push rings 12 rotate synchronously with the cleaning shaft 3. At this time, because the protrusions 15 on the push rings 12 are restricted by the groove wall of the annular guide groove 131, the push rings 12 will move axially along the trajectory of the annular guide groove 131 during rotation.

[0066] Since the annular guide groove 131 is arranged in a wave shape, as the push ring 12 continues to rotate, the protrusion 15 will pass through different positions in the annular guide groove 131 in sequence, causing the push ring 12 to periodically move closer to or away from the cleaning disc 5.

[0067] When the protrusion 15 is located within the straight groove section, the elastic element 11 is in a compressed state. When the protrusion 15 moves from the straight groove section to the transverse groove section in the next reciprocating groove section, the elastic element 11 is released, thereby moving the push ring 12. The push ring 12 pushes the cleaning disc 5 to move axially. The limiting sleeves 13 and the protrusion 15 on both sides are configured such that when one side of the protrusion 15 is located within the transverse groove section, the other side of the protrusion 15 is located within the straight groove section. This causes the elastic elements 11 on both sides to release alternately, and the two push rings 12 to push the cleaning disc 5 alternately, causing the cleaning disc 5 to reciprocate.

[0068] With the above settings, the cleaning disc 5 does not need to be equipped with an additional independent drive mechanism. The cleaning disc 5 can be moved back and forth in the axial direction by simply rotating the cleaning shaft 3 itself.

[0069] To ensure that each tooth interval 402 in the milling cutter 4 can be cleaned during the axial movement of the cleaning disc 5, the number of cleaning teeth 501 on the cleaning disc 5 is consistent with the number of reciprocating groove segments in the annular guide groove 131.

[0070] like Figures 3-6 As shown, the cleaning mechanism also includes a cleaning shield 9.

[0071] The cleaning cover 9 is installed on the frame 1 and covers the outside of the cleaning disc 5 and the reciprocating movement mechanism.

[0072] The cleaning cover 9 is used to protect the cleaning disc 5 and the reciprocating moving mechanism, so as to prevent a large amount of metal chips generated during the milling process from entering the cleaning mechanism and affecting the axial movement of the cleaning disc 5.

[0073] The cleaning cover 9 has a movable outlet 901 on the side facing the milling cutter 4. A portion of the cleaning disc 5 facing the milling cutter 4 extends through the movable outlet 901 to the outside of the cleaning cover 9 and forms a mating relationship with the milling cutter 4. The movable outlet 901 has a certain length along the axial direction of the cleaning disc 5, allowing the cleaning disc 5 to have space to move axially.

[0074] The cleaning cover 9 is equipped with a lubricant storage chamber 902, which stores lubricant. There are two lubricant storage chambers 902, located on opposite sides of the cleaning sleeve 503. The two limiting sleeves 13 are located within the two lubricant storage chambers 902. Because the annular guide groove 131 penetrates the sleeve wall of the limiting sleeve 13, the lubricant can enter the movable areas at both ends of the cleaning sleeve 503 through the annular guide groove 131, thus ensuring lubricant is present at both ends of the cleaning sleeve 503. When the cleaning disc 5 reciprocates along the axis, the two ends of the cleaning sleeve 503 alternately insert into the two lubricant storage chambers 902, squeezing the lubricant within and causing it to enter the transverse channel 504 on the cleaning sleeve 503. Subsequently, the lubricant passes through the transverse channel 504 and the radial channel 505 in sequence, and is discharged from the lubricant outlet.

[0075] When the cleaning disc 5 moves in the reverse direction, the other end of the cleaning sleeve 503 enters the lubricant storage cavity 902 on the other side, thereby realizing the continuous delivery of lubricant to the cleaning tooth 501 position.

[0076] With the above settings, the lubricant is automatically supplied by the reciprocating motion of the cleaning disc 5 itself, without the need for an additional power mechanism, making the structure simpler.

[0077] The milling cutter shaft 2 and the cleaning shaft 3 are connected by a transmission assembly, which includes a drive gear and a driven gear. The drive gear is mounted on the milling cutter shaft 2 to prevent rotation, and the driven gear is mounted on the cleaning shaft 3 to prevent rotation. The drive gear and the driven gear mesh, and the ratio of the number of teeth of the drive gear to the number of teeth of the driven gear is equal to the ratio of the number of cutting teeth 401 to the number of cleaning teeth 501. When the milling cutter shaft 2 rotates, it is driven to rotate in the opposite direction through the transmission assembly.

[0078] like Figures 1-3 As shown, the shaft positioning and clamping mechanism is mounted on the frame 1 and is used to position and fix the motor shaft 7 to be processed.

[0079] The shaft positioning and clamping mechanism includes a three-jaw chuck 6 and a push rod 8. The three-jaw chuck 6 is installed on one side of the frame 1 and is used to clamp one end of the motor shaft 7 to be processed.

[0080] Specifically, the three-jaw chuck 6 includes a chuck body and multiple jaws evenly arranged circumferentially, each jaw being able to move synchronously along the radial direction of the chuck body. When the motor shaft 7 to be processed is placed inside the three-jaw chuck 6, by driving each jaw to approach synchronously, each jaw abuts against the outer circumferential surface of the motor shaft 7, thereby clamping and fixing one end of the motor shaft 7.

[0081] The push rod 8 is located on the side of the frame 1 away from the three-jaw chuck 6 and is arranged along the axial direction of the motor shaft 7 to be processed. One end of the push rod 8 is connected to the frame 1, and the other end abuts against the end of the motor shaft 7 to be processed away from the three-jaw chuck 6.

[0082] With the above configuration, the three-jaw chuck 6 can restrict the radial movement of the motor shaft 7, while the push rod 8 can apply axial support force to the motor shaft 7, thereby improving the installation stability of the motor shaft 7 during the machining process.

[0083] In use, the present invention first installs the motor shaft 7 to be processed onto the shaft positioning and clamping mechanism. Specifically, one end of the motor shaft 7 is placed inside the three-jaw chuck 6, and the three-jaw chuck 6 is driven to move multiple jaws synchronously, thereby clamping and fixing the motor shaft 7. Then, the position of the push rod 8 is adjusted so that the push rod 8 abuts against the other end of the motor shaft 7, forming axial support for the motor shaft 7.

[0084] After the motor shaft 7 is positioned, the milling equipment is started. The milling cutter shaft 2 rotates and drives the milling cutter 4 to rotate synchronously at high speed. The cutting teeth 401 on the outer periphery of the milling cutter 4 continuously cut the surface of the motor shaft 7, thereby forming a keyway.

[0085] During the rotation of the milling cutter shaft 2, the milling cutter shaft 2 drives the cleaning shaft 3 to rotate synchronously through the transmission assembly.

[0086] Because the transmission assembly creates a reverse transmission relationship between the milling cutter shaft 2 and the cleaning shaft 3, the cleaning shaft 3 drives the cleaning disc 5 to rotate in the opposite direction to the milling cutter 4.

[0087] During the rotation of the cleaning disc 5, the cleaning teeth 501 on its outer periphery continuously approach and engage with the milling cutter 4, locking into the tooth spacing 402 of the milling cutter 4. Simultaneously, the cleaning shaft 3 drives the push ring 12 to rotate synchronously, and the protrusion 15 on the push ring 12 moves along the annular guide groove 131 on the limiting sleeve 13. Because the annular guide groove 131 has a wave-like structure, the push ring 12 will periodically move along the axial direction of the cleaning shaft 3 during rotation. The two annular guide grooves 131 cause the two push rings 12 to move alternately toward the cleaning disc 5, thereby pushing the cleaning disc 5 to reciprocate along the axial direction, and each cleaning tooth 501 sequentially passes through each tooth spacing 402. Since cleaning cotton 14 is provided on the outside of the cleaning teeth 501, during the movement of the cleaning teeth 501, the cleaning cotton 14 can contact the inner wall of the tooth spacing 402, scraping away and removing metal debris adhering to the inside of the tooth spacing 402.

[0088] During the axial reciprocating movement of the cleaning disc 5, the two ends of the cleaning sleeve 503 alternately enter the two lubricant storage chambers 902, squeezing the lubricant inside the lubricant storage chambers 902 and causing the lubricant to enter the transverse channel 504. Subsequently, the lubricant flows along the transverse channel 504 and the radial channel 505, and is discharged from the lubricant outlet provided on the cleaning tooth 501. Since the lubricant outlet is covered by the cleaning cotton 14, the lubricant can be evenly diffused into the interior of the cleaning cotton 14. When the cleaning tooth 501 enters the tooth gap 402, the lubricant-containing cleaning cotton 14 can reduce the friction between itself and the milling cutter 4 while removing debris, making the cleaning process smoother.

[0089] With the above structure, while the milling cutter 4 is machining the keyway, the present invention utilizes the relative movement between the cleaning disc 5 and the milling cutter 4 to enable each cleaning tooth 501 to enter the tooth spacing 402 of each milling cutter 4, and remove the metal debris stuck in the tooth spacing 402 by axial reciprocating movement.

[0090] The cleaning tooth 501 in this invention can directly act inside the tooth gap 402 to mechanically remove stubborn debris that is difficult to be carried out by liquid or air flow, thereby avoiding the problems of long-term accumulation of debris leading to reduced chip space, increased cutting resistance, and decreased machining quality in the milling cutter 4.

[0091] In this embodiment, the reciprocating movement mechanism uses a structure consisting of a push ring 12, an elastic element 11, and a wave-shaped annular guide groove 131 to achieve axial reciprocating movement of the cleaning disc 5. In other embodiments, the reciprocating movement mechanism may also use a cam mechanism, a crank-slider mechanism, a linear telescopic mechanism, or other structures that can drive the cleaning disc 5 to reciprocate along the cleaning shaft 3. In this case, an additional drive is required.

[0092] In this embodiment, the lubricant storage chamber 902 is disposed inside the cleaning cover 9, and the lubricant is delivered by the squeezing action during the axial movement of the cleaning disc 5. In other embodiments, the lubricant storage chamber 902 may also be independently disposed on the frame 1 and connected to the lubricant channel inside the cleaning disc 5 through a flexible pipeline, and the lubricant is delivered to the cleaning tooth 501 position through an external pumping mechanism.

Claims

1. A milling device for keyway of motor shaft, comprising a frame, on which a milling cutter assembly for milling the shaft is mounted, the milling cutter assembly comprising a milling cutter shaft and a milling cutter mounted on the milling cutter shaft to prevent rotation, characterized in that, The frame is also equipped with a cleaning mechanism, which includes a cleaning shaft, a cleaning disc, and a reciprocating movement mechanism. The cleaning shaft is parallel to the milling cutter shaft and located beside it. The milling cutter shaft is located on the side of the milling cutter facing away from the motor shaft to be milled. The cleaning disc is slidably mounted on the cleaning shaft, and the cleaning disc and the cleaning shaft are relatively non-rotating. Multiple cleaning teeth are evenly arranged on the outer circumference of the cleaning disc, and the shape of the cleaning teeth matches the shape of the tooth spacing in the milling cutter. Cleaning cotton is provided on the outer circumference of the cleaning teeth. The reciprocating movement mechanism is connected to the cleaning disc to drive the cleaning disc to reciprocate along the axial direction of the cleaning shaft. The cleaning disc rotates in the opposite direction to the milling cutter. During rotation, along the projection direction of the milling cutter axis, each cleaning tooth is sequentially fitted into the corresponding tooth spacing. The reciprocating movement mechanism drives the cleaning disc to move the cleaning teeth axially back and forth through the tooth spacing of the milling cutter to remove metal debris from the tooth spacing.

2. The keyway milling device for a motor shaft according to claim 1, characterized in that, Both end faces of the cleaning tooth and the sidewall of the cleaning tooth are chamfered.

3. The keyway milling device for a motor shaft according to claim 1, characterized in that, The cleaning disc has multiple lubricant channels, the same number as the cleaning teeth. Each cleaning tooth has a lubricant outlet on its side edge. Each lubricant channel is connected to a lubricant outlet. The cleaning mechanism also includes a lubricant storage chamber. The inlet of each lubricant channel is connected to the lubricant storage chamber. The lubricant in the lubricant storage chamber can flow through each lubricant channel and be squeezed out from the lubricant outlet.

4. The keyway milling device for a motor shaft according to claim 3, characterized in that, The lubricant outlet is a cutout located between the two end faces of the cleaning tooth and parallel to the end faces of the cleaning tooth. The cleaning cotton is arranged around the side edge of the cleaning tooth and covers the cutout.

5. The keyway milling device for a motor shaft according to claim 4, characterized in that, The cleaning mechanism also includes a cleaning cover, which is mounted on the frame and covers the outside of the cleaning disc. The cleaning cover has a movable outlet, and the portion of the cleaning disc facing the milling cutter extends through the movable outlet to the outside of the cleaning cover to cooperate with the milling cutter.

6. The keyway milling device for a motor shaft according to claim 5, characterized in that, The reciprocating movement mechanism is located inside the cleaning cover. It includes two fixed rings, two elastic elements, two push rings, and two limiting sleeves. The fixed rings are fixedly mounted on the cleaning shaft, with each fixed ring located on one side of the cleaning disc. The two elastic elements are mounted on the cleaning shaft and connected to opposite side walls of the two fixed rings. The two push rings are anti-rotation mounted on the cleaning shaft and connected to opposite ends of the two elastic elements. There is a gap between the cleaning disc and the two push rings. Protrusions are connected to the outer side walls of the push rings. The two limiting sleeves are fixedly mounted on the cleaning cover and fitted onto the outer sides of the two push rings. The limiting sleeves have wavy annular guide grooves, which include multiple reciprocating groove segments. The protrusions on the two push rings are inserted into the annular guide grooves on the two limiting sleeves. When the cleaning shaft rotates, the annular guide grooves, through the protrusions on the two push rings, force the two push rings to move alternately toward the other push ring, thereby causing the push rings to push the cleaning disc to reciprocate axially.

7. The keyway milling device for a motor shaft according to claim 6, characterized in that, The number of cleaning teeth on the cleaning disc is the same as the number of reciprocating grooves in the annular guide groove.

8. The keyway milling device for a motor shaft according to claim 7, characterized in that, The cleaning disc includes a cleaning sleeve and a cleaning plate fixedly mounted on the outside of the cleaning sleeve. The cleaning teeth are arranged on the outer periphery of the cleaning plate. The lubricant channel includes a transverse channel formed on the sleeve wall of the cleaning sleeve and extending along the axis of the cleaning sleeve, and a radial channel formed on the cleaning plate and extending radially along the cleaning plate and communicating with the transverse channel. The radial channel communicates with the lubricant outlet. There are two lubricant storage cavities, both formed on the cleaning cover. The two lubricant storage cavities are respectively arranged on both sides of the cleaning sleeve. During the process of the cleaning disc being driven to move back and forth along the axis, the two ends of the cleaning sleeve are alternately inserted into the two lubricant storage cavities, thereby squeezing the lubricant into the lubricant channel and discharging the lubricant from the lubricant outlet.

9. A keyway milling device for a motor shaft according to any one of claims 1-4, characterized in that, The cleaning shaft and the milling cutter shaft are connected by a transmission assembly. When the milling cutter shaft rotates, it drives the cleaning shaft to rotate in the opposite direction.

10. A keyway milling device for a motor shaft according to any one of claims 1-4, characterized in that, The rotating shaft positioning and clamping mechanism includes a three-jaw chuck and a push rod. The three-jaw chuck is clamped at one end of the rotating shaft to be processed, and the push rod is axially pushed at the other end of the rotating shaft to be processed.

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