Hobbing device for machining gearbox parts

Abstract

The invention relates to the related technical field of machining, in particular to a gear hobbing device for machining gearbox parts, which comprises a machine table and a gear blank, a third grinding wheel is connected to one side of a first grinding wheel through a first spring, and a third gear is fixedly mounted at the lower end of the third grinding wheel; a second grinding wheel attached to the peripheries of the two sides is arranged between the first grinding wheel and the third grinding wheel, a second gear connected with the first gear and the third gear in an engaged mode is fixedly installed at the lower end of the second grinding wheel, and a first connecting plate is rotationally installed between the first mounting frame and the second grinding wheel. A second connecting plate is rotationally mounted between the second grinding wheel and the third grinding wheel, and a driving gear meshed with the periphery of the first gear is fixedly mounted at the upper end of the second motor through an output shaft of the second motor. By means of the gear hobbing device for machining the gearbox parts, burrs on the bottom end face of a gear blank, the tooth crest on the periphery of the gear blank and the tooth groove can be removed at the same time.

Description

Technical Field

[0001] The present invention relates to the technical field related to mechanical processing, and in particular to a gear hobbing device for processing gearbox parts. Background Art

[0002] The components of a gearbox include shafts, gears, and bearings. Gear processing requires first cutting and forming the gear using a hobbing device, and then using a chamfering device to remove sharp corners to improve meshing performance and service life. Gear hobbing adopts the Fancheng method, which uses the meshing movement of the hobbing cutter and the gear blank to remove excess material to form an involute tooth shape. However, the cutting process will produce burrs on the end face of the gear blank. If not handled, it may not only scratch the operator, but also increase the workload of the subsequent chamfering process and reduce overall efficiency. In addition, gears that have not been deburred during transportation may scratch each other, affecting the surface quality. Therefore, timely deburring is crucial to ensuring processing efficiency, operational safety and product quality.

[0003] For example, the patent document with application publication number CN117733248A in the prior art provides a gear hobbing device for processing gearbox parts; the device is equipped with a grinding part, and while hobbing the gear blank, the sliding seat drives the second rack to move up and down, and the first rack is driven by the first gear engaged with the second rack to move in the opposite direction. Under the movement of the first rack, the cross bar movably connected in the slide groove opened by the first rack is driven to move upward, so that the grinding frame of the grinding part moves upward, allowing the grinding wheel to contact the bottom surface of the gear blank, and grinding the burrs that appear on the bottom surface of the gear blank during the gear hobbing process, thereby reducing the processing time of deburring and chamfering the gear blank in the subsequent gear processing.

[0004] However, the device still has the following problems: the device uses a grinding wheel, and the grinding wheel can only come into contact with the bottom of the gear blank, which makes it impossible to remove burrs on the tooth tops and tooth grooves on the periphery of the gear blank, which is obviously a major defect. Summary of the Invention

[0005] The purpose of the present invention is to solve the problems in the background technology and to propose a gear hobbing device for machining gearbox parts.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a gear hobbing device for processing gearbox parts, comprising a machine table and a gear blank, a control room is slidably installed on the upper end of the machine table, a hob is rotatably installed inside the control room, a first motor and a second motor are fixedly installed in the machine table, a first mounting frame is fixedly installed on the upper end of the first motor through its output shaft, the gear blank is installed on the upper end of the first mounting frame, a first grinding wheel is rotatably installed on the outer periphery of the first mounting frame, a first gear is fixedly installed on the lower end of the first grinding wheel, and a third grinding wheel is connected to one side of the first grinding wheel through a first spring. A grinding brush is fixedly installed on the middle part of the upper end of the third grinding wheel, and a third gear is fixedly installed on the lower end of the third grinding wheel. A second grinding wheel that fits with the periphery of both sides is provided between the first grinding wheel and the third grinding wheel, and a second gear that is meshed with the first gear and the third gear is fixedly installed on the lower end of the second grinding wheel. A first connecting plate is rotatably installed between the first mounting frame and the second grinding wheel, and a second connecting plate is rotatably installed between the second grinding wheel and the third grinding wheel. A driving gear that is meshed with the periphery of the first gear is fixedly installed on the upper end of the second motor through its output shaft.

[0007] In the above-mentioned gear hobbing device for processing gearbox parts, the first mounting frame is rotatably mounted with the first connecting ring A and the first connecting ring B, the lower end of the second grinding wheel is rotatably mounted with the second connecting ring A and the second connecting ring B, the lower end of the third grinding wheel is rotatably mounted with the third connecting ring A and the third connecting ring B, the first connecting plate is fixedly mounted between the first connecting ring A and the second connecting ring B, and the second connecting plate is fixedly mounted between the second connecting ring A and the third connecting ring A.

[0008] In the above-mentioned gear hobbing device for processing gearbox parts, the first spring is fixedly installed between the third connecting ring B and the first connecting ring B, and telescopic sleeves that are plugged into each other are fixedly installed between the third connecting ring B and the first connecting ring B, and the first spring is arranged in the telescopic sleeve.

[0009] In the above-mentioned gear hobbing device for processing gearbox parts, a fan-shaped cover is fixedly installed on the upper end of the machine platform through a bracket, a hydraulic cylinder is fixedly installed on the upper end of the fan-shaped cover, and a connecting seat is fixedly installed on the lower end of the hydraulic cylinder through its output shaft. A second mounting frame is provided on the upper side of the inner cavity of the fan-shaped cover and is rotatably connected to the outer periphery of the connecting seat, and the gear blank is installed between the first mounting frame and the second mounting frame.

[0010] In the above-mentioned gear hobbing device for processing gearbox parts, a dust collecting sleeve is fixedly installed between the fan-shaped cover and the machine table, a filter screen is provided in the dust collecting sleeve, an air guide sleeve is fixedly installed at the lower end of the machine table, an air guide hole is opened between the dust collecting sleeve and the air guide sleeve, an exhaust pipe is fixedly installed at the outer end of the air guide sleeve, and a fan is fixedly installed in the exhaust pipe.

[0011] In the above-mentioned gear hobbing device for processing gearbox parts, a driven rod is rotatably installed in the dust collecting sleeve and the air guide sleeve, the driven rod is plugged into the middle part of the filter screen, a cleaning brush is fixedly installed on the outer periphery of the driven rod, the upper end of the cleaning brush and the lower end of the filter screen are in contact with each other, a limiting hole is provided at the lower end of the third grinding wheel, and a limiting rod plugged into the limiting hole is fixedly installed on the upper end of the driven rod.

[0012] In the above-mentioned gear hobbing device for processing gearbox parts, a limiting sleeve is fixedly installed in the middle of the inner cavity of the air guide sleeve, a limiting slide rod is fixedly installed in the limiting sleeve, a movable seat that is plugged into the limiting slide rod is fixedly installed in the limiting sleeve, and a second spring that is sleeved on the outer periphery of the limiting slide rod is fixedly installed between the movable seat and the limiting sleeve.

[0013] In the above-mentioned gear hobbing device for processing gearbox parts, an installation cavity is provided in the middle of the dust collecting sleeve, a dust collecting box is inserted and installed in the installation cavity, the filter is fixedly installed in the dust collecting box, slots are provided on the upper and lower sides of the installation cavity respectively, plug-in blocks that are inserted into the slots are fixedly installed on the upper and lower sides of the dust collecting box, limit rings are slidably installed on the upper and lower sides of the outer periphery of the dust collecting box, and a threaded sleeve that is threadedly connected to the limit rings on both sides is rotatably installed on the outer periphery of the dust collecting box.

[0014] Compared with the existing technology, the advantages of this gear hobbing device for processing gearbox parts are: 1. This device drives the gear, the first gear, the second gear and the third gear, so that the second motor can simultaneously drive the first grinding wheel, the second grinding wheel, the third grinding wheel and the grinding brush to rotate. The first grinding wheel, the second grinding wheel and the third grinding wheel can remove burrs on the bottom end surface of the gear blank, and the grinding brush can remove burrs on the tooth top and tooth groove on the periphery of the gear blank.

[0015] 2. The device is provided with a first spring and a first connecting plate and a second connecting plate. When the outer diameter of the tooth blank changes, the first spring can always ensure that the grinding brush is in contact with the outer periphery of the tooth blank, and the first connecting plate and the second connecting plate can always ensure that the first gear, the second gear and the third gear are connected to each other, so that the second motor can drive the second grinding wheel, the third grinding wheel and the grinding brush to rotate.

[0016] 3. This device is equipped with a fan-shaped cover, a dust collecting sleeve and an air guide sleeve. The fan can guide the burrs and other impurities generated by grinding into the dust collecting sleeve, and the internal filter can block the burrs and other impurities, thereby facilitating the recovery of impurities. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the external structure of the machine and fan-shaped cover of the present invention; Figure 2 This is a schematic diagram of the internal structure of the machine and fan-shaped cover of the present invention; Figure 3 It is a schematic diagram of the external structure of the grinding brush, grinding wheel and driving gear of the present invention; Figure 4 It is a schematic diagram of the internal structure of the fan-shaped cover and the second mounting frame of the present invention; Figure 5 This is a schematic diagram of the internal structure of the fan-shaped cover, dust collecting sleeve, and air guide sleeve of the present invention; Figure 6 The present invention Figure 5 A schematic diagram of the structure at center A; Figure 7 This is a schematic diagram of the internal split structure of the dust collecting sleeve and the dust collecting box of the present invention; Figure 8 The present invention Figure 7 A magnified schematic diagram of the structure at point B in the middle.

[0018] In the picture: 1. Machine; 11. Control room; 12. Hob; 2. Gear blank; 21. First motor; 211. First mounting bracket; 22. Second motor; 221. Driving gear; 23. First grinding wheel; 231. First gear; 232. First connecting ring A; 233. First connecting ring B; 24. Second grinding wheel; 241. Second gear; 242. Second connecting ring A; 243. Second connecting ring B; 25. Third grinding wheel; 250. Grinding brush; 251. Third gear; 252. Third connecting ring A; 253. Third connecting ring B; 26. First connecting plate; 261. Second connecting plate; 27. First spring; 271. Telescopic sleeve; 3. Fan-shaped cover; 31. Hydraulic cylinder; 311. Connecting seat; 312. Second mounting bracket; 32. Dust collection sleeve; 321. Mounting cavity; 322. Air guide hole; 323. Dust collection box; 324. Filter; 325. Follower rod; 326. Cleaning brush; 327, limit ring; 3271, slot; 3272, insert; 3275, threaded sleeve; 33. Air guide sleeve; 332. Exhaust pipe; 333. Fan; 334. Limit sleeve; 335. Limit slide bar; 336. Movable seat; 337. Second spring; 338. Limit jack; 339. Limit rod. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0021] Reference Figures 1-8 A gear hobbing device for processing gearbox parts includes a machine table 1 and a gear blank 2. A control room 11 is slidably installed on the upper end of the machine table 1, and a hob 12 is rotatably installed inside the control room 11. A first motor 21 and a second motor 22 are fixedly installed in the machine table 1. A first mounting frame 211 is fixedly installed on the upper end of the first motor 21 through its output shaft. The gear blank 2 is installed on the upper end of the first mounting frame 211. A first grinding wheel 23 is rotatably installed on the outer periphery of the first mounting frame 211. A first gear 231 is fixedly installed on the lower end of the first grinding wheel 23. A third grinding wheel 25 is connected to one side of the first grinding wheel 23 through a first spring 27. The middle part of the upper end of the third grinding wheel 25 is fixedly installed. It is equipped with a grinding brush 250, a third gear 251 is fixedly installed at the lower end of the third grinding wheel 25, a second grinding wheel 24 is provided between the first grinding wheel 23 and the third grinding wheel 25, and is in contact with the outer periphery of both sides, and a second gear 241 is fixedly installed at the lower end of the second grinding wheel 24, which is meshed with the first gear 231 and the third gear 251. A first connecting plate 26 is rotatably installed between the first mounting frame 211 and the second grinding wheel 24, and a second connecting plate 261 is rotatably installed between the second grinding wheel 24 and the third grinding wheel 25. A driving gear 221 meshed with the outer periphery of the first gear 231 is fixedly installed on the upper end of the second motor 22 through its output shaft.

[0022] The first connecting ring A232 and the first connecting ring B233 are rotatably installed on the periphery of the first mounting frame 211, the second connecting ring A242 and the second connecting ring B243 are rotatably installed on the lower end of the second grinding wheel 24, the third connecting ring A252 and the third connecting ring B253 are rotatably installed on the lower end of the third grinding wheel 25, the first connecting plate 26 is fixedly installed between the first connecting ring A232 and the second connecting ring B243, and the second connecting plate 261 is fixedly installed between the second connecting ring A242 and the third connecting ring A252.

[0023] The first spring 27 is fixedly installed between the third connecting ring B253 and the first connecting ring B233 , and mutually plugged telescopic sleeves 271 are fixedly installed between the third connecting ring B253 and the first connecting ring B233 , and the first spring 27 is arranged in the telescopic sleeve 271 .

[0024] A fan-shaped cover 3 is fixedly installed on the upper end of the machine 1 through a bracket, a hydraulic cylinder 31 is fixedly installed on the upper end of the fan-shaped cover 3, and a connecting seat 311 is fixedly installed on the lower end of the hydraulic cylinder 31 through its output shaft. A second mounting frame 312 is provided on the upper side of the inner cavity of the fan-shaped cover 3 and is rotatably connected to the periphery of the connecting seat 311. The gear blank 2 is installed between the first mounting frame 211 and the second mounting frame 312.

[0025] The specific working principle and method of use of the present invention are explained in detail below: When in use, the gear blank 2 is placed between the first mounting frame 211 and the second mounting frame 312, and the hydraulic cylinder 31 is started. The hydraulic cylinder 31 drives the second mounting frame 312 to move downward through its output shaft, so that the gear blank 2 can be installed and positioned, and the control room 11 is slid to align the hob 12 with the gear hobbing position of the gear blank 2, and the first motor 21 and the motor inside the control room 11 are started. The gear blank 2 can be driven to rotate by the first motor 21, so that the outer gear hobbing position of the gear blank 2 is constantly in contact with the hob 12, and the hob 12 can be driven to rotate by the motor inside the control room 11, thereby achieving the effect of gear hobbing processing on the gear blank 2.

[0026] When installing the gear blank 2, the first spring 27 is used to make the grinding brush 250 contact the periphery of the gear blank 2, and through the first connecting plate 26 and the second connecting plate 261, when the grinding brush 250 moves, the second gear 241 is always meshed and connected with the first gear 231 and the third gear 251. Therefore, when it is necessary to clean the burrs on the tooth tops, tooth grooves and bottom end faces of the outer periphery of the gear blank 2, the second motor 22 can be started to drive the meshing connection between the gear 221, the first gear 231, the second gear 241 and the third gear 251, which can drive the first grinding wheel 23, the second grinding wheel 24, the third grinding wheel 25 and the grinding brush 250 to rotate, thereby achieving the effect of cleaning the burrs on the tooth tops, tooth grooves and bottom end faces of the outer periphery of the gear blank 2.

[0027] Specifically, a dust collecting sleeve 32 is fixedly installed between the fan-shaped cover 3 and the machine 1, and a filter screen 324 is provided in the dust collecting sleeve 32. An air guide sleeve 33 is fixedly installed at the lower end of the machine 1. An air guide hole 322 is opened between the dust collecting sleeve 32 and the air guide sleeve 33. An exhaust pipe 332 is fixedly installed at the outer end of the air guide sleeve 33, and a fan 333 is fixedly installed in the exhaust pipe 332.

[0028] A driven rod 325 is rotatably installed in the dust collecting sleeve 32 and the air guide sleeve 33, and the driven rod 325 is plugged into the middle of the filter screen 324. A cleaning brush 326 is fixedly installed on the periphery of the driven rod 325, and the upper end of the cleaning brush 326 is in contact with the lower end of the filter screen 324. A limiting hole 338 is provided at the lower end of the third grinding wheel 25, and a limiting rod 339 is fixedly installed on the upper end of the driven rod 325 and is plugged into the limiting hole 338.

[0029] A limiting sleeve 334 is fixedly installed in the middle of the inner cavity of the air guide sleeve 33, a limiting slide 335 is fixedly installed in the limiting sleeve 334, a movable seat 336 that is plugged into the limiting slide 335 is fixedly installed in the limiting sleeve 334, and a second spring 337 that is sleeved on the outer periphery of the limiting slide 335 is fixedly installed between the movable seat 336 and the limiting sleeve 334.

[0030] An installation cavity 321 is provided in the middle of the dust collecting sleeve 32, and a dust collecting box 323 is installed in the installation cavity 321. The filter screen 324 is fixedly installed in the dust collecting box 323. Slots 3271 are provided on the upper and lower sides of the inner cavity of the installation cavity 321 respectively. Insert blocks 3272 that are plugged into the slots 3271 are fixedly installed on the upper and lower sides of the dust collecting box 323. Limiting rings 327 are slidably installed on the upper and lower sides of the outer periphery of the dust collecting box 323. A threaded sleeve 3275 that is threadedly connected to the limiting rings 327 on both sides is rotatably installed on the outer periphery of the dust collecting box 323.

[0031] When the tooth blank 2 is being ground and the dust generated by the gear hobbing and grinding of the tooth blank 2 needs to be cleaned, the fan 333 is started to guide the impurities in the fan-shaped cover 3 into the dust collecting sleeve 32, and the impurities can be blocked through the internal filter 324. In the process of rotation of the grinding brush 250, the plug-in connection between the limit socket 338 and the limit plug rod 339 can drive the cleaning brush 326 to rotate on the surface of the filter 324, thereby achieving the effect of cleaning the filter 324, avoiding impurities from clogging the surface of the filter 324, and ensuring air circulation.

[0032] When installing the dust box 323, the driven rod 325 is pulled at the lower end of the air guide sleeve 33 to separate the limiting hole 338 and the limiting rod 339, and the limiting rod 339 is adjusted to the lower side of the installation cavity 321. Then, the dust box 323 is installed in the installation cavity 321 through the plug connection between the plug block 3272 and the slot 3271. Then, the threaded sleeve 3275 is rotated on the periphery of the dust box 323. The dust box 323 is slidably connected to the limiting ring 327, which restricts the movement direction of the limiting ring 327. The rotating threaded sleeve 3275 can drive the two limiting rings 327 to move in opposite directions through the threaded connection between the two limiting rings 327, so that the two limiting rings 327 are respectively connected to the periphery of the dust collecting sleeve 32 on both sides. Finally, the driven rod 325 is released, and under the action of the second spring 337 restoring the deformation, the limit socket 338 and the limit rod 339 are re-connected, and the cleaning brush 326 and the filter 324 are fitted together to complete the installation of the dust box 323. Conversely, the dust box 323 can be disassembled to facilitate the recovery of impurities inside it.

[0033] It is further explained that the above-mentioned fixed connection should be understood in a broad sense unless otherwise clearly specified and limited. For example, it can be welding, gluing, or one-piece molding, etc., which are common means well known to those skilled in the art.

[0034] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A gear hobbing device for machining gearbox parts, comprising a machine platform and a gear blank, characterized in that: The cam is fixedly mounted on the upper end of the machine platform, and a control room is slidably installed in the upper end of the machine platform, and a hob is rotatably installed in the inner side of the control room, and a first motor and a second motor are fixedly installed in the machine platform, and the upper end of the first motor is fixedly mounted on the first mounting frame through its output shaft, and the gear blank is mounted on the upper end of the first mounting frame, and the first grinding wheel is fixedly mounted on the lower end of the first mounting frame. One side of the first grinding wheel is connected to the third grinding wheel through a first spring, and a grinding brush is fixedly mounted on the middle part of the upper end of the third grinding wheel, and the third gear is fixedly mounted on the lower end of the third grinding wheel. A second grinding wheel is provided between the first grinding wheel and the third grinding wheel, and a second gear meshed with the first gear and the third gear is fixedly mounted on the lower end of the second grinding wheel. A first connecting plate is rotatably installed between the first mounting frame and the second grinding wheel, and a second connecting plate is rotatably installed between the second grinding wheel and the third grinding wheel, and the upper end of the second motor is fixedly mounted with a driving gear meshed with the outer periphery of the first gear through its output shaft.

2. The gear hobbing device for machining gearbox parts according to claim 1, characterized in that: The first mounting frame is rotatably mounted with a first connecting ring A and a first connecting ring B on the periphery thereof, the second grinding wheel is rotatably mounted with a second connecting ring A and a second connecting ring B on the lower end thereof, the third grinding wheel is rotatably mounted with a third connecting ring A and a third connecting ring B on the lower end thereof, the first connecting plate is fixedly mounted between the first connecting ring A and the second connecting ring B, and the second connecting plate is fixedly mounted between the second connecting ring A and the third connecting ring A.

3. The gear hobbing device for machining gearbox parts according to claim 2, characterized in that: The first spring is fixedly installed between the third connecting ring B and the first connecting ring B, and telescopic sleeves that are plugged into each other are fixedly installed between the third connecting ring B and the first connecting ring B, and the first spring is arranged in the telescopic sleeve.

4. The gear hobbing device for machining gearbox parts according to claim 1, characterized in that: A fan-shaped cover is fixedly installed on the upper end of the machine platform through a bracket, a hydraulic cylinder is fixedly installed on the upper end of the fan-shaped cover, and a connecting seat is fixedly installed on the lower end of the hydraulic cylinder through its output shaft. A second mounting frame is provided on the upper side of the inner cavity of the fan-shaped cover and is rotatably connected to the periphery of the connecting seat, and the gear blank is installed between the first mounting frame and the second mounting frame.

5. The gear hobbing device for machining gearbox parts according to claim 4, characterized in that: A dust collecting sleeve is fixedly installed between the fan-shaped cover and the machine platform, a filter is provided in the dust collecting sleeve, an air guide sleeve is fixedly installed at the lower end of the machine platform, an air guide hole is opened between the dust collecting sleeve and the air guide sleeve, an exhaust pipe is fixedly installed at the outer end of the air guide sleeve, and a fan is fixedly installed in the exhaust pipe.

6. The gear hobbing device for machining gearbox parts according to claim 5, characterized in that: A driven rod is rotatably installed in the dust collecting sleeve and the air guide sleeve, the driven rod is plugged into the middle of the filter screen, a cleaning brush is fixedly installed on the periphery of the driven rod, the upper end of the cleaning brush is in contact with the lower end of the filter screen, a limiting socket is provided at the lower end of the third grinding wheel, and a limiting plug rod plugged into the limiting socket is fixedly installed on the upper end of the driven rod.

7. The gear hobbing device for machining gearbox parts according to claim 6, characterized in that: A limiting sleeve is fixedly installed in the middle of the inner cavity of the air guide sleeve, a limiting slide rod is fixedly installed in the limiting sleeve, a movable seat connected to the limiting slide rod is fixedly installed in the limiting sleeve, and a second spring is fixedly installed between the movable seat and the limiting sleeve and is sleeved on the periphery of the limiting slide rod.

8. The gear hobbing device for machining gearbox parts according to claim 7, characterized in that: The dust collecting sleeve is provided with an installation cavity in the middle part, a dust collecting box is installed in the installation cavity, a filter is fixedly installed in the dust collecting box, slots are respectively provided on the upper and lower sides of the installation cavity, plug-in blocks which are plugged into the slots are fixedly installed on the upper and lower sides of the dust collecting box, limiting rings are slidably installed on the upper and lower sides of the outer periphery of the dust collecting box, and a threaded sleeve which is threadedly connected to the limiting rings on both sides is rotatably installed on the outer periphery of the dust collecting box.

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