A gear hobbing machine with automatic indexing

Abstract

The application discloses an automatic tooth aligning gear hobbing machine, and relates to the technical field of gear hobbing machines, which comprises a gear hobbing device, an automatic tooth aligning clamp, a centering device and a sealing door. The gear hobbing device is used for phase adjustment of a gear hobbing shaft, the angular position of the gear hobbing is restored to the initial phase, the meshing relationship between the gear hobbing and a workpiece is reestablished, the continuity of the generation motion after tooth alignment is ensured, tooth profile misplacement caused by phase error is avoided, the gear hobbing and the workpiece are kept in the correct generation motion relationship, the precision of workpiece machining is ensured, the yield is improved, the automatic tooth aligning clamp can automatically and quickly find the tooth groove when the secondary clamping, the midway tool withdrawal detection and other working conditions requiring secondary tooth alignment are performed, the workpiece is angle compensated, the workpiece tooth groove is automatically rotated to the preset target position and stopped, the quick return of the workpiece tooth groove is realized, the tooth alignment time is shortened, and the tooth alignment efficiency is improved. The centering device is used for supporting the rotating workpiece.

Description

Technical Field

[0001] This invention relates to the field of gear hobbing machine technology, specifically to an automatic gear hobbing machine. Background Technology

[0002] A gear hobbing machine is a machining device that uses the relative motion between a hob and a workpiece to cut the workpiece into gears with different tooth profiles. It usually uses the generating method to process the required gears and is widely used in fields such as engineering machinery and precision equipment manufacturing. During the gear hobbing process, the clamping position of the workpiece and the relative positional relationship between the hob and the workpiece will affect the machining accuracy of the tooth profile.

[0003] During gear machining, when performing secondary clamping or mid-process tool retraction checks, it is necessary to readjust the initial meshing position between the hob and the workpiece by setting the gears to maintain the tooth groove accuracy during secondary machining. The secondary gear setting process requires multiple trial cuts and re-clamping to determine the tooth groove position, which is not only cumbersome and inefficient, but also results in unstable gear setting accuracy, which can easily lead to workpiece scrap. Summary of the Invention

[0004] The purpose of this invention is to provide an automatic gear hobbing machine to solve the problems of low efficiency and poor accuracy during secondary gear hobbing in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A workbench is included, on which a hobbing device is mounted. An automatic tooth-aligning fixture is mounted on one side of the hobbing device, and a centering device is mounted on one side of the automatic tooth-aligning fixture. A sealing door is slidably installed inside the centering device. During operation, a worker places the workpiece on the automatic tooth-aligning fixture, controls the automatic tooth-aligning fixture and the centering device to move to a predetermined position, controls the hobbing device to perform tooth hobbing on the workpiece, and after the tooth hobbing is completed, the worker removes the workpiece from the automatic tooth-aligning fixture.

[0006] The hobbing device includes a hob housing and a phase adjustment assembly. A lifting assembly is installed inside the hob housing, and an oil spraying assembly is installed on one side of the lifting assembly. During operation, the hob housing is moved to a predetermined position by the lifting assembly. During gear setting, the phase of the hob is adjusted by the phase adjustment assembly to return the hob to its initial position and to the relative angular position between the hob and the workpiece during the generating motion. The oil spraying assembly is used to spray cutting oil onto the hob.

[0007] The phase adjustment assembly includes a mounting plate that slides on the lifting assembly. A rotating disk is rotatably mounted on one side of the mounting plate, and a hobbing element is rotatably mounted inside the rotating disk. The hobbing element is located below the fuel injection assembly. A master and slave element is mounted on the hobbing element, a synchronizing element is mounted on one side of the master and slave element, and a drive shaft is mounted on one side of the synchronizing element.

[0008] A first motor is installed on one side of the rotating disk. During operation, the lifting assembly moves the mounting plate to a predetermined position, the mounting plate moves the rotating disk to a predetermined position, and the first motor drives the rotating disk to rotate to the predetermined position until the hobbing element contacts the workpiece. The drive shaft drives the master and slave elements to move, and the master and slave elements drive the hobbing element to move to cut the workpiece. At the same time, the lifting assembly continues to drive the mounting plate to descend until the workpiece is cut into a complete gear. The synchronizing element is used to synchronize the initial position of the hobbing element during gear setting.

[0009] The automatic gear-aligning fixture includes a sliding base that slides on a worktable. A workpiece spindle is rotatably mounted on the sliding base, and a fixture is mounted on the workpiece spindle. A first electric clutch is mounted at one end of the workpiece spindle and is installed on a split gearbox. A switching assembly is installed inside the sliding base, and a gear-finding assembly is mounted on one side of the switching assembly. The first electric clutch is connected to a control system. A first bevel gear is mounted on the workpiece spindle, and a first cylinder is mounted on one side of the sliding base. The first cylinder is connected to the control system. During normal operation, the workpiece is mounted onto the fixture, and the first cylinder is controlled to move the sliding base to a predetermined position. When aligning gears, the first electric clutch is disengaged, the switching assembly rotates the workpiece spindle, and simultaneously, the switching assembly moves the gear-finding assembly, which engages with the gear groove to determine the position of the workpiece's gear groove.

[0010] The hobbing element includes a hob shaft that rotates on a rotating disk. A hobbing cutter is mounted on the hob shaft, and a large gear is mounted at one end of the hob shaft. A driving shaft is mounted on one side of the hob shaft and rotates inside the rotating disk. A small gear is mounted at one end of the driving shaft, and the large gear and small gear mesh. During normal operation, the driving element drives the driving shaft to rotate, which in turn drives the small gear, which in turn drives the large gear, which in turn drives the hob shaft to rotate, ultimately causing the hobbing cutter to rotate.

[0011] The master and slave components include a first driving sprocket, which rotates on a master and slave shaft. A master and slave gear are coaxially mounted on the first driving sprocket. A first spline is mounted on the outer surface of the master and slave shaft. A first slave sprocket is slidably mounted on the first spline. A switching block is slidably mounted inside the rotating disk. A first driving component is mounted on one side of the switching block. The first driving component is connected to the control system.

[0012] The first driving component is the second cylinder. During normal operation, the second cylinder pushes the switching block to move closer to the master and driven gears. The switching block drives the first driven sprocket to move closer to the master and driven gears until the first driven sprocket meshes with the first driving sprocket. At this time, the power of the drive shaft drives the master and driven gears to rotate. The master and driven gears drive the first driving sprocket to rotate. The first driving sprocket drives the first driven sprocket to rotate. The first driven sprocket drives the master and driven shaft to rotate. The master and driven shaft drives the pinion to rotate. When the gears are aligned, the switching block drives the first driven sprocket to move away from the master and driven gears, and the first driven sprocket separates from the first driving sprocket.

[0013] The synchronizing element includes a second driving crankshaft that rotates on a driving shaft. An intermittent gear is coaxially mounted on the second driving crankshaft. A first guide angle is mounted on the teeth of the intermittent gear. A sliding sleeve is mounted on the intermittent gear and slides on the driving shaft. The sliding sleeve rotates on a switching block. A second driven crankshaft is mounted on the driving shaft. An elastic compensation bushing is installed inside the second driven crankshaft.

[0014] During normal operation, the second driving sprocket and the second driven sprocket are separated, and the intermittent gear does not transmit power to the driving and driven shafts. When gears are engaged, the second drive unit is stopped, and the second cylinder drives the switching block to move closer to the second driven sprocket. The switching block drives the sliding sleeve to move closer to the second driven sprocket, and the sliding sleeve drives the intermittent gear to move closer to the second driven sprocket. The intermittent gear drives the second driving sprocket to move closer to the second driven sprocket until the second driving sprocket and the second driven sprocket are engaged. At this time, the intermittent gear drives the second driving sprocket to rotate, and the second driving sprocket drives the second driven sprocket to rotate.

[0015] The drive shaft includes a main shaft that rotates inside a rotating disk. A split gearbox is mounted on one side of the main shaft, and a second drive component is mounted on the other side of the split gearbox. A drive gear is mounted on the main shaft, meshing with the driven gear. A synchronizing gear is mounted on one side of the drive gear, with a second guide angle on its teeth. The second drive component is connected to the control system. The second drive component is a second motor, which drives the split gearbox, which in turn drives the main shaft to rotate. The main shaft drives the drive gear and synchronizing gear to rotate, and the drive gear drives the driven gear. When the intermittent gear moves closer to the synchronizing gear, and when it meshes with the synchronizing gear, it stops rotating. A second cylinder controls the switching block to return to its initial position. When the intermittent gear and the synchronizing gear's teeth are misaligned, the first and second guide angles interact, causing the synchronizing gear to drive the intermittent gear to rotate until it meshes with the synchronizing gear. At this point, the intermittent gear drives the driven shaft to rotate, returning the hobbing cutter to the starting position of the generating phase.

[0016] The switching component includes a third drive unit mounted on a sliding chassis. An input shaft is mounted on the third drive unit, and a friction clutch is mounted on one side of the input shaft. An output shaft is mounted inside the friction clutch, and a protrusion is mounted on the output shaft. A connecting cylinder is mounted on the friction clutch, and a sliding groove is provided on the connecting cylinder. A double-headed slide rod is slidably mounted in the sliding groove, and a first limit plate is mounted on the double-headed slide rod. A first elastic element is mounted on the first limit plate, and one side of the first elastic element is mounted inside the connecting cylinder. The third drive unit is connected to the control system.

[0017] The first elastic element is a first spring, and the third driving element is a third geared motor. A second electric clutch is installed between the third geared motor and the input shaft. The second electric clutch is connected to the control system. A second bevel gear is installed on the output shaft. The first and second bevel gears mesh. During normal operation, the second electric clutch is disengaged to prevent the workpiece spindle from transmitting power to the third geared motor. When the gears mesh, the second electric clutch is engaged, and the third geared motor drives the input shaft to rotate. The input shaft drives the friction clutch to rotate. There is a delay when the friction clutch transmits power to the output shaft. At this time, there is relative rotation between the input shaft and the output shaft. The double-ended slide rod rotates onto the cam and moves away from the axis of the output shaft. The input shaft drives the output shaft to rotate slowly together. The output shaft drives the second bevel gear to rotate, and the second bevel gear drives the first bevel gear to rotate. The first bevel gear drives the workpiece spindle to rotate slowly. When the workpiece spindle is restricted, the friction clutch slips to protect the third geared motor. At this time, relative rotation occurs between the input shaft and the output shaft, and the double-ended slide rod rotates away from the cam. After a predetermined time, the first spring resets, driving the double-ended slide rod back to its initial position, and the third geared motor stops.

[0018] The tooth-finding assembly includes an L-shaped plate mounted on a sliding base. A protruding rod is slidably installed inside the L-shaped plate, abutting against the surface of a connecting cylinder. A first wedge block is installed on one side of the protruding rod, and a second wedge block is slidably installed on one side of the first wedge block. A groove is provided inside the second wedge block, and a connecting rod is slidably installed in the groove. A tooth-finding block is installed on one side of the connecting rod, and a second elastic element is installed on the tooth-finding block. One end of the second elastic element is installed on the second wedge block. A second limiting plate is installed on the tooth-finding block, and a third elastic element is installed on the second limiting plate. One end of the third elastic element is installed inside the L-shaped plate.

[0019] The second elastic element is the second spring, and the third elastic element is the third spring. When the double-ended slide rod moves away from the axis of the output shaft, the double-ended slide rod drives the convex rod to move away from the connecting cylinder. The convex rod drives the first wedge block to move away from the connecting cylinder. The first wedge block drives the second wedge block to move away from the first wedge block. The second wedge block drives the second spring to compress. The second spring drives the tooth-finding block to move away from the connecting cylinder. When the top of the tooth-finding block enters the workpiece tooth groove, the workpiece spindle is restricted from rotating. At this time, the double-ended slide rod returns to the initial position, the convex rod returns to the initial position, the convex rod drives the first wedge block to return to the initial position, the second spring resets and drives the second wedge block to return to the initial position, and the third spring resets and drives the tooth-finding block to move closer to the first wedge block until the tooth-finding block leaves the workpiece tooth groove.

[0020] The lifting assembly includes a fixed plate mounted on the cutter housing. A guide rail is installed on one side of the fixed plate, allowing the mounting plate to slide on the guide rail. A fourth drive component is mounted on one side of the fixed plate, and a lead screw is mounted on the other side of the fixed plate. The lead screw is mounted on the fourth drive component, which is connected to the control system. The fourth drive component is a fourth motor, which drives the lead screw to rotate, causing the mounting plate to slide on the guide rail.

[0021] The centering device includes a sliding seat that slides on a track. A slide plate is slidably mounted on the sliding seat. A fifth drive component is mounted on one side of the slide plate, and a clamping center is mounted on the slide plate. The fifth drive component is connected to the control system. A third cylinder is mounted on one side of the sliding seat and is connected to the control system. The fifth drive component is a fourth cylinder. When the workpiece is placed on the fixture, the fourth cylinder is controlled to drive the slide plate to descend. The slide plate drives the clamping center to press against the axis of the workpiece, and the third cylinder is controlled to drive the sliding seat to follow the sliding chassis.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows: By employing an automatic tooth-finding component, in situations requiring secondary tooth alignment such as secondary clamping or mid-process tool retraction detection, the component automatically and quickly finds the tooth groove, compensates for the workpiece angle, and automatically rotates the workpiece tooth groove to a preset target position, achieving rapid return of the workpiece tooth groove. This shortens the tooth alignment time and improves the efficiency of tooth alignment. Simultaneously, the phase of the hob shaft is adjusted, restoring the angular position of the hob to its initial phase, thus re-establishing the meshing relationship between the hob and the workpiece. This ensures the continuity of the generating motion after tooth alignment, avoids problems such as tooth misalignment due to phase errors, and ensures that the hob and workpiece are in the correct generating motion relationship, thereby guaranteeing the workpiece machining accuracy and improving the yield. Attached Figure Description

[0023] Figure 1 This is a perspective view of the gear hobbing machine of the present invention; Figure 2 This is a perspective view of the hobbing device of the present invention; Figure 3 This is an exploded view of the phase adjustment component of the present invention; Figure 4 This is a perspective view of the automatic tooth-aligning clamp and centering device of the present invention; Figure 5 This is a perspective view of the hobbing cutter element of the present invention; Figure 6 This is an exploded view of the master and slave elements of the present invention; Figure 7 This is an exploded view of the synchronization element of the present invention; Figure 8 This is a perspective view of the lifting assembly of the present invention. Figure 9 This is an exploded view of the switching component of the present invention; Figure 10 This is an exploded view of the tooth-finding assembly of the present invention.

[0024] In the diagram: 1. Hobbing device; 11. Hobbing housing; 12. Phase adjustment assembly; 121. Rotating disk; 122. Hobbing element; 1221. Hobbing shaft; 1222. Hobbing cutter; 1223. Large gear; 1224. Driven and driven shaft; 1225. Small gear; 123. Driven and driven element; 1231. First driving gear; 1232. Driven and driven gear; 1233. First driven gear; 1234. Switching block; 124. Synchronizing element; 1241. Intermittent gear; 1242. Sliding sleeve; 1243. First guide angle; 1244. Second driving gear; 1245. Second driven gear; 125. Drive shaft; 1251. Main shaft; 1252. Drive gear; 1253. Synchronizing gear; 1254. First drive gear; 1255. Second drive gear; 1256. First drive gear; 1257. Second drive gear; 1258. First drive gear; 1259. Second drive gear; 1250. Second drive gear; 1251. Main shaft; 1252. Drive gear; 1253. Synchronizing gear; 1254. First drive gear; 1255. Second ... 1. Two guide angles; 126. Mounting plate; 13. Lifting assembly; 131. Fixing plate; 132. Guide rail; 133. Lead screw; 14. Oil injection assembly; 2. Automatic gear clamping fixture; 21. Sliding chassis; 22. Fixture tooling; 23. Switching assembly; 231. Output shaft; 232. Input shaft; 233. Third drive component; 234. Friction clutch; 235. Connecting cylinder; 236. Protrusion; 237. Double-headed slide bar; 24. Gear finding assembly; 241. L-shaped plate; 242. Protrusion rod; 243. First wedge block; 244. Second wedge block; 245. Second elastic element; 246. Gear finding block; 247. Third elastic element; 3. Centering device; 31. Sliding seat; 32. Slide plate; 33. Pressing center; 4. Sealing door. Detailed Implementation

[0025] 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 scope of protection of the present invention.

[0026] like Figures 1-8 The first embodiment of the present invention shown includes an automatic gear hobbing machine comprising a worktable, a hobbing device 1 mounted on the worktable, an automatic gear hobbing fixture 2 mounted on one side of the hobbing device 1, a centering device 3 mounted on one side of the automatic gear hobbing fixture 2, and a sealing door 4 slidably mounted inside the centering device 3. During operation, the operator places the workpiece on the automatic gear hobbing fixture 2, controls the automatic gear hobbing fixture 2 and the centering device 3 to move to a predetermined position, controls the hobbing device 1 to perform gear hobbing on the workpiece, and after the gear hobbing is completed, the operator removes the workpiece from the automatic gear hobbing fixture 2.

[0027] The hobbing device 1 includes a hobbing housing 11 and a phase adjustment assembly 12. A lifting assembly 13 is installed inside the hobbing housing 11, and an oil spraying assembly 14 is installed on one side of the lifting assembly 13. During operation, the hobbing housing 11 is moved to a predetermined position by the lifting assembly 13. During gear setting, the phase of the hobbing cutter 1222 is adjusted by the phase adjustment assembly 12 to return the hobbing cutter 1222 to its initial position and to return the hobbing cutter 1222 to the relative angular position between the hobbing cutter 1222 and the workpiece during the generating motion. The oil spraying assembly 14 is used to spray cutting oil onto the hobbing cutter 1222.

[0028] The phase adjustment assembly 12 includes a mounting plate 126 that slides on the lifting assembly 13. A rotating disk 121 is rotatably mounted on one side of the mounting plate 126. A hobbing element 122 is rotatably mounted inside the rotating disk 121. The hobbing element 122 is located below the fuel injection assembly 14. A master-slave element 123 is mounted on the hobbing element 122. A synchronizing element 124 is mounted on one side of the master-slave element 123. A drive shaft 125 is mounted on one side of the synchronizing element 124.

[0029] A first motor is installed on one side of the rotating disk 121. During operation, the lifting assembly 13 drives the mounting plate 126 to a predetermined position, the mounting plate 126 drives the rotating disk 121 to a predetermined position, and the first motor drives the rotating disk 121 to rotate to the predetermined position until the hobbing element 122 contacts the workpiece. The drive shaft 125 drives the main and driven elements 123 to move, and the main and driven elements 123 drive the hobbing element 122 to move to cut the workpiece. At the same time, the lifting assembly 13 continues to drive the mounting plate 126 to descend until the workpiece is cut into a complete gear. The synchronizing element 124 is used to synchronize the initial position of the hobbing element 122 during gear setting.

[0030] The hobbing element 122 includes a hobbing shaft 1221, which rotates on a rotating disk 121. A gear hobbing cutter 1222 is mounted on the hobbing shaft 1221. A large gear 1223 is mounted at one end of the hobbing shaft 1221, and a driving shaft 1224 is mounted on one side of the hobbing shaft 1221. The driving shaft 1224 rotates inside the rotating disk 121, and a small gear 1225 is mounted at one end of the driving shaft 1224. The large gear 1223 and the small gear 1225 mesh. During normal operation, the driving element 123 drives the driving shaft 1224 to rotate, which in turn drives the small gear 1225 to rotate. The small gear 1225 then drives the large gear 1223 to rotate, which in turn drives the hobbing shaft 1221 to rotate, and the hobbing shaft 1221 then drives the gear hobbing cutter 1222 to rotate.

[0031] The master-slave element 123 includes a first driving chain 1231, which rotates on a master-slave shaft 1224. A master-slave gear 1232 is coaxially mounted on the first driving chain 1231. A first spline is mounted on the outer surface of the master-slave shaft 1224. A first driven chain 1233 is slidably mounted on the first spline. A switching block 1234 is slidably mounted inside the rotating disk 121. A first driving component is mounted on one side of the switching block 1234 and is connected to the control system.

[0032] The first driving component is the second cylinder. During normal operation, the second cylinder pushes the switching block 1234 to move closer to the master-driven gear 1232. The switching block 1234 drives the first driven sprocket 1233 to move closer to the master-driven gear 1232 until the first driven sprocket 1233 meshes with the first driving sprocket 1231. At this time, the power of the drive shaft 125 drives the master-driven gear 1232 to rotate. The master-driven gear 1232 drives the first driving sprocket 1231 to rotate. The first driving sprocket 1231 drives the first driven sprocket 1233 to rotate. The first driven sprocket 1233 drives the master-driven shaft 1224 to rotate. The master-driven shaft 1224 drives the pinion 1225 to rotate. When the gears are engaged, the switching block 1234 drives the first driven sprocket 1233 to move away from the master-driven gear 1232, and the first driven sprocket 1233 separates from the first driving sprocket 1231.

[0033] The synchronizing element 124 includes a second driving chain 1244, which rotates on a driving shaft 1224. An intermittent gear 1241 is coaxially mounted on the second driving chain 1244. A first guide angle 1243 is mounted on the teeth of the intermittent gear 1241. A sliding sleeve 1242 is mounted on the intermittent gear 1241 and slides on the driving shaft 1224. The sliding sleeve 1242 rotates on a switching block 1234. A second driven chain 1245 is mounted on the driving shaft 1224, and an elastic compensation bushing is installed inside the second driven chain 1245.

[0034] During normal operation, the second driving chainring 1244 and the second driven chainring 1245 are separated, and the intermittent gear 1241 does not transmit power to the driving and driven shafts 1224. When gears are engaged, the second drive unit is stopped, and the second cylinder is controlled to move the switching block 1234 toward the second driven chainring 1245. The switching block 1234 moves the sliding sleeve 1242 toward the second driven chainring 1245, and the sliding sleeve 1242 moves the intermittent gear 1241 toward the second driven chainring 1245. The intermittent gear 1241 moves the second driving chainring 1244 toward the second driven chainring 1245 until the second driving chainring 1244 and the second driven chainring 1245 are engaged. At this time, the intermittent gear 1241 drives the second driving chainring 1244 to rotate, and the second driving chainring 1244 drives the second driven chainring 1245 to rotate.

[0035] The drive shaft 125 includes a main shaft 1251, which rotates inside the rotating disk 121. A split gearbox is installed on one side of the main shaft 1251, and a second drive component is installed on one side of the split gearbox. A drive gear 1252 is installed on the main shaft 1251, and the drive gear 1252 meshes with a driven gear 1232. A synchronizing gear 1253 is installed on one side of the drive gear 1252, and a second guide angle 1254 is installed on the teeth of the synchronizing gear 1253. The second drive component is connected to the control system. The second driving component is a second motor, which drives the split gearbox to move. The split gearbox drives the main shaft 1251 to rotate, and the main shaft 1251 drives the drive gear 1252 and the synchronous gear 1253 to rotate. The drive gear 1252 drives the driven gear 1232 to rotate. When the intermittent gear 1241 moves closer to the synchronous gear 1253, and when the intermittent gear 1241 is just engaged with the synchronous gear 1253, the intermittent gear 1241 does not rotate. The second cylinder controls the switching block 1234 to switch back to the initial position. When the tooth grooves of 41 and synchronous gear 1253 are misaligned, the first guide angle 1243 and the second guide angle 1254 interact with each other. Since the first guide angle 1243 and the second guide angle 1254 are inclined planes, under the action of the axial thrust provided by the second cylinder, the normal force of the inclined plane generates a tangential component force. This tangential component force drives the intermittent gear 1241 to rotate freely around its axis until the intermittent gear 1241 meshes with the synchronous gear 1253. At this time, the intermittent gear 1241 drives the main and driven shafts 1224 to rotate, so that the hobbing cutter 1222 returns to the starting position of the generating phase.

[0036] The lifting assembly 13 includes a fixed plate 131, which is mounted on the cutter housing 11. A guide rail 132 is mounted on one side of the fixed plate 131, and a mounting plate 126 slides on the guide rail 132. A fourth driving component is mounted on one side of the fixed plate 131, and a lead screw 133 is mounted on the other side of the fixed plate 131. The lead screw 133 is mounted on the fourth driving component, which is connected to the control system. The fourth driving component is a fourth motor, which drives the lead screw 133 to rotate, and the lead screw 133 drives the mounting plate 126 to slide on the guide rail 132.

[0037] The centering device 3 includes a sliding seat 31 that slides on a track. A slide plate 32 is slidably mounted on the sliding seat 31. A fifth driving component is mounted on one side of the slide plate 32, and a clamping center 33 is mounted on the slide plate 32. The fifth driving component is connected to the control system. A third cylinder is mounted on one side of the sliding seat 31 and is connected to the control system. The fifth driving component is a fourth cylinder. When the workpiece is placed on the fixture 22, the fourth cylinder is controlled to drive the slide plate 32 to descend. The slide plate 32 drives the clamping center 33 to press against the axis of the workpiece. The third cylinder is controlled to drive the sliding seat 31 to move with the sliding chassis 21.

[0038] like Figures 9-10 The second embodiment of the present invention shown provides an automatic tooth-setting fixture 2 that is different from the first embodiment. The difference is that the automatic tooth-setting method is changed in this embodiment. During tooth setting, the switching component 23 can drive the tooth-finding component 24 to quickly find the tooth groove of the workpiece. When the tooth groove of the workpiece generating phase is found, the generating position can be automatically fixed, which improves the tooth-finding efficiency. At the same time, after the phase position is found, the tooth-finding component 24 automatically exits, which does not hinder the subsequent secondary cutting process.

[0039] The specific details are as follows: The automatic gear-aligning fixture 2 includes a sliding base 21, which slides on a worktable. A workpiece spindle is rotatably mounted on the sliding base 21, and a fixture 22 is mounted on the workpiece spindle. A first electric clutch is mounted at one end of the workpiece spindle and is installed on a split gearbox. A switching component 23 is installed inside the sliding base 21, and a gear-finding component 24 is mounted on one side of the switching component 23. The first electric clutch is connected to the control system. A first bevel gear is mounted on the workpiece spindle, and a first cylinder is mounted on one side of the sliding base 21. The first cylinder is connected to the control system. During normal operation, the workpiece is mounted on the fixture 22, and the first cylinder is controlled to move the sliding base 21 to a predetermined position. When aligning gears, the first electric clutch is disengaged, and the switching component 23 drives the workpiece spindle to rotate. Simultaneously, the switching component 23 drives the gear-finding component 24 to move, and the gear-finding component 24 engages in the gear groove to determine the position of the workpiece's gear groove.

[0040] The switching component 23 includes a third drive component 233, which is mounted on a sliding chassis 21. An input shaft 232 is mounted on the third drive component 233. A friction clutch 234 is mounted on one side of the input shaft 232. An output shaft 231 is mounted inside the friction clutch 234. A protrusion 236 is mounted on the output shaft 231. A connecting cylinder 235 is mounted on the friction clutch 234. A sliding groove is provided on the connecting cylinder 235. A double-headed slide rod 237 is slidably mounted in the sliding groove. A first limiting plate is mounted on the double-headed slide rod 237. A first elastic element is mounted on the first limiting plate. One side of the first elastic element is mounted inside the connecting cylinder 235. The third drive component 233 is connected to the control system.

[0041] The first elastic element is a first spring, and the third driving element 233 is a third geared motor. A second electric clutch is installed between the third geared motor and the input shaft 232. The second electric clutch is connected to the control system. A second bevel gear is installed on the output shaft 231. The first bevel gear and the second bevel gear mesh. During normal operation, the second electric clutch is disengaged to prevent the workpiece spindle from transmitting power to the third geared motor. When the gears are engaged, the second electric clutch is engaged, and the third geared motor drives the input shaft 232 to rotate. The input shaft 232 drives the friction clutch 234 to rotate. There is a delay when the friction clutch 234 transmits power to the output shaft 231. At this time, the input shaft 232 and the output shaft 231... During relative rotation, the double-headed slide bar 237 rotates onto the protrusion 236 and moves away from the axis of the output shaft 231. The input shaft 232 drives the output shaft 231 to rotate slowly together. The output shaft 231 drives the second bevel gear to rotate, the second bevel gear drives the first bevel gear to rotate, and the first bevel gear drives the workpiece spindle to rotate slowly. When the workpiece spindle is restricted, the friction clutch 234 slips to protect the third reduction motor. At this time, relative rotation occurs between the input shaft 232 and the output shaft 231, and the double-headed slide bar 237 rotates away from the protrusion 236. After a predetermined time, the first spring resets and drives the double-headed slide bar 237 back to its initial position, controlling the third reduction motor to stop.

[0042] The tooth-finding assembly 24 includes an L-shaped plate 241, which is mounted on a sliding base 21. A protruding rod 242 is slidably installed inside the L-shaped plate 241, and the protruding rod 242 abuts against the surface of the connecting cylinder 235. A first wedge block 243 is installed on one side of the protruding rod 242, and a second wedge block 244 is slidably installed on one side of the first wedge block 243. A groove is provided inside the second wedge block 244, and a connecting rod is slidably installed in the groove. A tooth-finding block 246 is installed on one side of the connecting rod. A second elastic element 245 is installed on the tooth-finding block 246, and one end of the second elastic element 245 is installed on the second wedge block 244. A second limiting plate is installed on the tooth-finding block 246, and a third elastic element 247 is installed on the second limiting plate. One end of the third elastic element 247 is installed inside the L-shaped plate 241.

[0043] The second elastic element 245 is a second spring, and the third elastic element 247 is a third spring. When the double-ended slide rod 237 moves away from the axis of the output shaft 231, the double-ended slide rod 237 drives the convex rod 242 to move away from the connecting cylinder 235. The convex rod 242 drives the first wedge block 243 to move away from the connecting cylinder 235. The first wedge block 243 drives the second wedge block 244 to move away from the first wedge block 243. The second wedge block 244 compresses the second spring, and the second spring... The moving tooth-finding block 246 moves away from the connecting cylinder 235. When the top of the tooth-finding block 246 enters the workpiece tooth groove, the workpiece spindle is restricted from rotating. At this time, the double-headed slide bar 237 returns to the initial position, the convex rod 242 returns to the initial position, the convex rod 242 drives the first wedge block 243 to return to the initial position, the second spring resets and drives the second wedge block 244 to return to the initial position, and the third spring resets and drives the tooth-finding block 246 to move closer to the first wedge block 243 until the tooth-finding block 246 leaves the workpiece tooth groove.

[0044] Working principle of the invention: During normal operation, the workpiece is manually placed on the fixture 22. The fourth cylinder is controlled to drive the slide plate 32 to descend, and the slide plate 32 drives the clamping center 33 to press on the axis of the workpiece. The first cylinder is controlled to drive the sliding base 21 to move to the predetermined position, and the third cylinder is controlled to drive the sliding seat 31 to follow the sliding base 21. The fourth motor is controlled to drive the lead screw 133 to rotate, and the lead screw 133 drives the mounting plate 126 to slide on the guide rail 132. The lead screw 133 drives the mounting plate 126 to move to the predetermined position, and the mounting plate 126 drives the rotating disk 121 to move to the predetermined position. The first motor drives the rotating disk 121 to rotate to the predetermined position. At this time, the gear hobbing cutter 1222 is located on the workpiece, and the fourth motor is controlled to stop.

[0045] When the hobbing cutter 1222 is positioned on the workpiece, the second motor is controlled to drive the split gearbox to move. The split gearbox drives the main shaft 1251 to rotate, which in turn drives the drive gear 1252 and the synchronous gear 1253 to rotate. The drive gear 1252 drives the master-driven gear 1232 to rotate, which in turn drives the first drive sprocket 1231 to rotate. The first drive sprocket 1231 drives the first driven sprocket 1233 to rotate, which in turn drives the master-driven shaft 1224 to rotate. The small gear 1225 is driven to rotate, which in turn drives the large gear 1223 to rotate. The large gear 1223 drives the hob shaft 1221 to rotate, which in turn drives the hob cutter 1222 to rotate. Simultaneously, the gearbox drives the workpiece spindle to rotate, which in turn drives the fixture 22 to rotate synchronously. The hob cutter 1222 cuts the workpiece. The fourth motor is then started, which drives the lead screw 133 to rotate. The lead screw 133 drives the mounting plate 126 to descend until the hob cutter 1222 cuts the workpiece into a complete gear.

[0046] When gears are aligned, the first electric clutch is disengaged and the second electric clutch is engaged. The third reduction motor drives the input shaft 232 to rotate, which in turn drives the friction clutch 234 to rotate. There is a delay when the friction clutch 234 transmits power to the output shaft 231. At this time, there is relative rotation between the input shaft 232 and the output shaft 231. The double-headed slide rod 237 rotates onto the protrusion 236 and moves away from the axis of the output shaft 231. The input shaft 232 drives the output shaft 231 to rotate slowly together. The output shaft 231 drives the second bevel gear to rotate, which in turn drives the first bevel gear to rotate. The first bevel gear drives the workpiece spindle to rotate slowly.

[0047] When the double-headed slide bar 237 moves away from the axis of the output shaft 231, the double-headed slide bar 237 drives the convex rod 242 to move away from the connecting cylinder 235. The convex rod 242 drives the first wedge block 243 to move away from the connecting cylinder 235. The first wedge block 243 drives the second wedge block 244 to move away from the first wedge block 243. The second wedge block 244 drives the second spring to compress. The second spring drives the tooth-finding block 246 to move away from the connecting cylinder 235. When the top of the tooth-finding block 246 enters the workpiece tooth groove, the workpiece spindle is restricted from rotating. At this time, the workpiece tooth groove is in the correct phase position.

[0048] When the workpiece spindle is restricted, the friction clutch 234 slips to protect the third geared motor. At this time, relative rotation occurs between the input shaft 232 and the output shaft 231. The double-headed slide rod 237 rotates away from the protrusion 236 and returns to its initial position. The double-headed slide rod 237 drives the protrusion 242 back to its initial position. The protrusion 242 drives the first wedge block 243 back to its initial position. The second spring reset drives the second wedge block 244 back to its initial position. The third spring reset drives the tooth-finding block 246 to move towards the first wedge block 243 until the tooth-finding block 246 leaves the workpiece tooth groove. After a predetermined time, the first spring reset drives the double-headed slide rod 237 back to its initial position, controlling the third geared motor to stop.

[0049] When the workpiece tooth groove is in the generating phase, the second cylinder is simultaneously controlled to move the switching block 1234 towards the second driven toothed sprocket 1245. The switching block 1234 moves the sliding sleeve 1242 towards the second driven toothed sprocket 1245, the sliding sleeve 1242 moves the intermittent gear 1241 towards the second driven toothed sprocket 1245, and the intermittent gear 1241 moves the second driving toothed sprocket 1244 towards the second driven toothed sprocket 1245 until the second driving toothed sprocket 1244 and the second driven toothed sprocket 1245 are engaged. When the intermittent gear 1241 is just engaged with the synchronizing gear 1253, the intermittent gear 1241 does not rotate, and the second cylinder is controlled to move the switching block 1234 back to the initial position. When the tooth grooves of the synchronizing gear 1253 are misaligned, the first guide angle 1243 and the second guide angle 1254 interact with each other. Since the first guide angle 1243 and the second guide angle 1254 are inclined planes, under the axial thrust provided by the second cylinder, the normal force of the inclined plane generates a tangential component force. This tangential component force drives the intermittent gear 1241 to rotate freely around its axis. The intermittent gear 1241 drives the second driving sprocket 1244 to rotate. The second driving sprocket 1244 drives the second driven sprocket 1245 to rotate. The second driven sprocket 1245 drives the main and driven shafts 1224 to rotate until the intermittent gear 1241 meshes with the synchronizing gear 1253. At this time, the main and driven shafts 1224 drive the hobbing cutter 1222 to rotate, so that the hobbing cutter 1222 returns to the starting position of the generating phase.

[0050] When both the workpiece tooth groove and the hobbing cutter 1222 are in the phase position, the second cylinder is controlled to push the switching block 1234 to move closer to the master and driven gear 1232. The switching block 1234 drives the first driven gear 1233 to move closer to the master and driven gear 1232 until the first driven gear 1233 meshes with the first driving gear 1231. The second motor is then controlled to rotate, so that the hobbing cutter 1222 continues to cut the workpiece tooth groove.

[0051] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An automatic gear hobbing machine, characterized in that: Includes a workbench, on which a hobbing device (1) is installed, an automatic tooth-aligning clamp (2) is installed on one side of the hobbing device (1), a centering device (3) is installed on one side of the automatic tooth-aligning clamp (2), and a sealing door (4) is slidably installed inside the centering device (3). The roller cutter device (1) includes a roller cutter housing (11) and a phase adjustment assembly (12). A lifting assembly (13) is installed inside the roller cutter housing (11), and an oil injection assembly (14) is installed on one side of the lifting assembly (13). The phase adjustment assembly (12) includes a mounting plate (126) that slides on the lifting assembly (13). A rotating disk (121) is rotatably mounted on one side of the mounting plate (126). A hobbing element (122) is rotatably mounted inside the rotating disk (121). The hobbing element (122) is located below the fuel injection assembly (14). A master-slave element (123) is mounted on the hobbing element (122). A synchronizing element (124) is mounted on one side of the master-slave element (123). A drive shaft (125) is mounted on one side of the synchronizing element (124). The automatic gear-aligning fixture (2) includes a sliding chassis (21) that slides on a worktable. A workpiece spindle is rotatably mounted on the sliding chassis (21), and a fixture (22) is mounted on the workpiece spindle. A first electric clutch is mounted on one end of the workpiece spindle and is mounted on a split gearbox. A switching assembly (23) is installed inside the sliding chassis (21), and a gear-finding assembly (24) is mounted on one side of the switching assembly (23). The first electric clutch is connected to a control system.

2. The automatic gear hobbing machine according to claim 1, characterized in that: The hobbing element (122) includes a hobbing shaft (1221) that rotates on a rotating disk (121). A hobbing cutter (1222) is mounted on the hobbing shaft (1221). A large gear (1223) is mounted on one end of the hobbing shaft (1221). A master-slave shaft (1224) is mounted on one side of the hobbing shaft (1221). The master-slave shaft (1224) rotates inside the rotating disk (121). A small gear (1225) is mounted on one end of the master-slave shaft (1224). The large gear (1223) and the small gear (1225) mesh.

3. The automatic gear hobbing machine according to claim 2, characterized in that: The master-slave element (123) includes a first driving chain (1231), which rotates on a master-slave shaft (1224). A master-slave gear (1232) is coaxially mounted on the first driving chain (1231). A first spline is mounted on the outer surface of the master-slave shaft (1224). A first slave chain (1233) is slidably mounted on the first spline. A switching block (1234) is slidably mounted inside the rotating disk (121). A first driving member is mounted on one side of the switching block (1234). The first driving member is connected to the control system.

4. The automatic gear hobbing machine according to claim 3, characterized in that: The synchronization element (124) includes a second active crank chain (1244), which rotates on a master-slave shaft (1224). An intermittent gear (1241) is coaxially mounted on the second active crank chain (1244). A first guide angle (1243) is mounted on the teeth of the intermittent gear (1241). A sliding sleeve (1242) is mounted on the intermittent gear (1241). The sliding sleeve (1242) slides on the master-slave shaft (1224) and rotates on a switching block (1234). A second driven crank chain (1245) is mounted on the master-slave shaft (1224). An elastic compensation bushing is installed inside the second driven crank chain (1245).

5. The automatic gear hobbing machine according to claim 4, characterized in that: The drive shaft (125) includes a main shaft (1251) that rotates inside a rotating disk (121). A split gearbox is mounted on one side of the main shaft (1251), and a second drive component is mounted on one side of the split gearbox. A drive gear (1252) is mounted on the main shaft (1251), and the drive gear (1252) meshes with a driven gear (1232). A synchronizing gear (1253) is mounted on one side of the drive gear (1252), and a second guide angle (1254) is mounted on the teeth of the synchronizing gear (1253). The second drive component is connected to a control system.

6. The automatic gear hobbing machine according to claim 2, characterized in that: The switching component (23) includes a third drive unit (233), which is mounted on a sliding chassis (21). An input shaft (232) is mounted on the third drive unit (233). A friction clutch (234) is mounted on one side of the input shaft (232). An output shaft (231) is mounted inside the friction clutch (234). A protrusion (236) is mounted on the output shaft (231). A connecting cylinder (235) is mounted on the friction clutch (234). A sliding groove is provided on the connecting cylinder (235). A double-headed slide rod (237) is slidably mounted in the sliding groove. A first limiting plate is mounted on the double-headed slide rod (237). A first elastic element is mounted on the first limiting plate. One side of the first elastic element is mounted inside the connecting cylinder (235). The third drive unit (233) is connected to the control system.

7. The automatic gear hobbing machine according to claim 6, characterized in that: The tooth-finding assembly (24) includes an L-shaped plate (241) mounted on a sliding base (21). A protruding rod (242) is slidably installed inside the L-shaped plate (241). The protruding rod (242) abuts against the surface of the connecting cylinder (235). A first wedge block (243) is installed on one side of the protruding rod (242), and a second wedge block (244) is slidably installed on one side of the first wedge block (243). The second wedge block (244) is provided with... The device has a groove, in which a connecting rod is slidably installed. A tooth-finding block (246) is installed on one side of the connecting rod. A second elastic element (245) is installed on the tooth-finding block (246). One end of the second elastic element (245) is installed on a second wedge block (244). A second limiting plate is installed on the tooth-finding block (246). A third elastic element (247) is installed on the second limiting plate. One end of the third elastic element (247) is installed inside an L-shaped plate (241).

8. The automatic gear hobbing machine according to claim 1, characterized in that: The lifting assembly (13) includes a fixed plate (131) which is mounted on the cutter housing (11). A guide rail (132) is mounted on one side of the fixed plate (131). The mounting plate (126) slides on the guide rail (132). A fourth driving member is mounted on one side of the fixed plate (131). A lead screw (133) is mounted on the other side of the fixed plate (131). The lead screw (133) is mounted on the fourth driving member. The fourth driving member is connected to the control system.

9. The automatic gear hobbing machine according to claim 1, characterized in that: The centering device (3) includes a sliding seat (31) that slides on a track. A sliding plate (32) is slidably mounted on the sliding seat (31). A fifth driving component is mounted on one side of the sliding plate (32). A pressing tip (33) is mounted on the sliding plate (32). The fifth driving component is connected to the control system.

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