Gear hobbing apparatus

Abstract

The application discloses a gear milling device for gear disc processing and relates to the technical field of gear disc processing.The gear milling device comprises a bottom plate and a gear disc body, the upper side of the bottom plate is fixedly connected with a fixing frame, the upper side of the fixing frame is fixedly connected with a hydraulic cylinder, the output end of the lower side of the hydraulic cylinder is fixedly connected with an electric track, the inner side of the electric track is slidably connected with a guide block, the lower side of the guide block is fixedly connected with a milling cutter, the upper side of the bottom plate is provided with a limiting unit, and the limiting unit comprises a fixed plate.The gear milling device is provided with a rotating pipe, a rotating drum, a hydraulic cylinder and a milling cutter, so that the rotation of the gear disc is conveniently controlled, the milling cutter is controlled to move, and the gear block is processed on the gear disc;when processing is performed, the piston disc is controlled to move through an air pump, a plurality of clamping plates are controlled to move towards each other, the clamping plates are used for preliminarily limiting the gear disc, then the vertical plates on the two sides are controlled to move towards each other, and the stable plates on the front and back sides are controlled to move towards each other, so that the stability of gear disc processing is further improved.

Description

Technical Field

[0001] This invention relates to the field of gear disc machining technology, specifically to a gear milling device for gear disc machining. Background Technology

[0002] In the field of mechanical transmission, the gear sprocket, as a core power transmission component, directly determines the stability and service life of the transmission system through the machining accuracy of its tooth blocks. Currently, when machining the tooth blocks of a gear sprocket using a milling cutter, a specific fixture system is typically relied upon to position and clamp the gear sprocket body. When machining gears on bicycles, tooth blocks need to be milled into the gear sprocket.

[0003] A search revealed a Chinese patent with application number "CN202223541834.2", which specifically describes a gear milling machine. The machine includes a fixed platform, a support frame fixedly connected to the top of the fixed platform, support legs fixedly connected to the top of the support frame, a top frame fixedly connected to the top of the support legs, an adjusting rod rotatably connected to the bottom of the top frame via a bearing, a fixed motor fixedly connected to the bottom of the adjusting rod, a hydraulic rod frame fixedly connected to the surface of the adjusting rod, a gear milling device fixedly connected to one end of the hydraulic rod frame, and a fixed rod fixedly connected to the top of the fixed platform.

[0004] However, existing gear disc machining limiting devices generally suffer from a lack of structural design. Specifically, most devices only employ simple radial clamping or a single axial clamping method. This single limiting mode is insufficient to provide multi-dimensional constraints under complex milling forces (including radial cutting forces and axial vibrations), resulting in the gear disc being prone to slight displacement or runout during machining.

[0005] Therefore, the present invention proposes a milling device for gear disc machining to solve the problems mentioned above. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a milling device for gear disc processing, which solves the problem of unstable gear disc positioning when using a milling cutter for gear disc processing.

[0007] To achieve the above objectives, the present invention provides the following technical solution: A gear milling device for machining gear discs includes a base plate and a gear disc body. A fixed frame is fixedly connected to the upper side of the base plate, and a hydraulic cylinder is fixedly connected to the upper side of the fixed frame. An electric track is fixedly connected to the lower output end of the hydraulic cylinder. A guide block is slidably connected to the inner side of the electric track, and a milling cutter is fixedly connected to the lower side of the guide block. A limit unit is provided on the upper side of the base plate. The limit unit includes a fixed plate, which is fixedly connected to the upper side of the base plate. A rotating tube is rotatably connected to the front side of the fixed plate. A fixed disk is fixedly connected to the front end of the rotating tube. A rotating cylinder is fixedly connected to the front side of the fixed disk. A contact disk is fixedly connected to the outer side of the rotating cylinder. Multiple moving rods are provided on the outer side of the rotating cylinder, and a clamping plate is fixedly connected to one end of each moving rod.

[0008] Preferably, two guide rails are fixedly connected to the upper side of the base plate, two sliders are slidably connected to the inner side of the guide rails, upright plates are fixedly connected to the upper side of the sliders on both sides, and movable plates are fixedly connected to the outer side of the upright plates. Control rods are provided on the outer side of the upright plates on both the front and rear sides. A stabilizing plate is fixedly connected to one end of the control rod, and an L-shaped plate is fixedly connected to the other end of the control rod. Side plates are fixedly connected to the outer side of the L-shaped plates on both the front and rear sides.

[0009] Preferably, a connecting frame is fixedly connected to the outer side of the upright plate, a control shaft is rotatably connected to the upper side of the connecting frame, a rotating plate is fixedly connected to the upper end of the control shaft, two linkage plates are rotatably connected to the upper side of the rotating plate, and an installation rod is fixedly connected to the upper side of the linkage plate, and the installation rod is rotatably connected to the side plate.

[0010] Preferably, a gear three is fixedly connected to the lower end of the control shaft, a support plate is fixedly connected to the upper side of the base plate, and a toothed plate that meshes with the gear three is fixedly connected to the upper side of the support plate.

[0011] Preferably, two mounting blocks are fixedly connected to the upper side of the base plate, and a bidirectional screw is rotatably connected between the two mounting blocks. The two ends of the bidirectional screw are provided with opposite threads, and the two ends of the bidirectional screw are respectively threaded to the two side moving plates. A motor is fixedly connected to the outer side of the mounting block.

[0012] Preferably, the stabilizing plate and the clamping plate are both made of rubber material, the clamping plate has an arc-shaped structure, and the control rod is slidably connected to the upright plate.

[0013] Preferably, an inclined plate is rotatably connected to the outer side of the lower end of the plurality of moving rods, a rotating block is rotatably connected to the outer side of the inclined plate, a piston disc is fixedly connected to the rear side of the rotating block, and a spring is fixedly connected between the outer side of the piston disc and the inner wall of the rotating cylinder.

[0014] Preferably, an air pump and a motor are fixedly connected to the rear side of the fixed plate, a conveying pipe is fixedly connected between the air pump and the fixed plate, an exhaust valve is provided on the outside of the conveying pipe, the conveying pipe is connected to a rotating pipe, a gear is fixedly connected to the outside of the rotating pipe, a rotating shaft is rotatably connected to the front side of the fixed plate, and a gear two that meshes with gear one is fixedly connected to the outside of the rotating shaft.

[0015] This invention provides a milling device for machining gear discs. Compared with the prior art, it has the following advantages: This gear milling equipment for gear disc processing is equipped with a rotary tube, rotary drum, hydraulic cylinder, and milling cutter to facilitate control of gear disc rotation and milling cutter movement, thus machining tooth blocks on the gear disc. During processing, an air pump controls the movement of the piston disc, which in turn controls the movement of multiple clamping plates in opposite directions, facilitating initial positioning of the gear disc by the clamping plates. Then, the vertical plates on both sides are controlled to move in opposite directions, and the stabilizing plates on the front and rear sides are controlled to move closer to each other, further improving the stability of gear disc processing. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the limiting unit in this invention; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 This is a cross-sectional perspective view of the rotating cylinder in this invention; Figure 5 This is a partial three-dimensional structural diagram of the present invention; Figure 6 This is a three-dimensional structural diagram of the movable plate in this invention; Figure 7 This is a three-dimensional structural diagram of the neutral plate in this invention; Figure 8 for Figure 7 Enlarged view of point B in the middle.

[0017] In the diagram: 1. Base plate; 2. Gear disc body; 3. Limiting unit; 4. Fixing frame; 5. Hydraulic cylinder; 6. Electric track; 7. Guide block; 8. Milling cutter; 31. Fixing plate; 32. Rotary tube; 33. Fixing disc; 35. Gear one; 36. Rotating shaft; 37. Gear two; 38. Motor one; 39. Air pump; 310. Conveying pipe; 311. Exhaust valve; 312. Rotary drum; 313. Contact disc; 314. Moving rod; 315. Clamping plate; 316. Inclined plate; 317. Rotating block 318. Piston disc; 319. Spring; 320. Guide rail; 321. Slider; 322. Vertical plate; 323. Moving plate; 324. Mounting block; 325. Motor II; 326. Bidirectional screw; 327. Control rod; 328. Stabilizing plate; 329. L-shaped plate; 330. Side plate; 331. Connecting frame; 332. Control shaft; 333. Rotating plate; 334. Linkage plate; 335. Mounting rod; 336. Gear III; 337. Gear plate; 338. Support plate. Detailed Implementation

[0018] 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.

[0019] This invention provides the following technical solutions: Example

[0020] Please see Figure 1 - Figure 8 A gear milling device for gear disc machining includes a base plate 1 and a gear disc body 2. A fixing frame 4 is fixedly connected to the upper side of the base plate 1, and a hydraulic cylinder 5 is fixedly connected to the upper side of the fixing frame 4. An electric track 6 is fixedly connected to the lower output end of the hydraulic cylinder 5. A guide block 7 is slidably connected to the inner side of the electric track 6, and a milling cutter 8 is fixedly connected to the lower side of the guide block 7. A limit unit 3 is provided on the upper side of the base plate 1. The limit unit 3 includes a fixing plate 31, which is fixedly connected to the upper side of the base plate 1. A rotating tube 32 is rotatably connected to the front side of the fixing plate 31. A fixed plate 33 is fixedly connected to the front end, and a rotating cylinder 312 is fixedly connected to the front side of the fixed plate 33. A contact plate 313 is fixedly connected to the outer side of the rotating cylinder 312. Multiple moving rods 314 are provided on the outer side of the rotating cylinder 312. A clamping plate 315 is fixedly connected to one end of the moving rod 314. When machining the gear disk body 2, the hydraulic cylinder 5 is controlled to drive the electric track 6 to descend. The electric track 6 drives the milling cutter 8 to descend. The electric track 6 is also controlled to drive the guide block 7 to move back and forth. The guide block 7 drives the milling cutter 8 to move back and forth, so that the milling cutter 8 can machine the gear disk body 2.

[0021] Two guide rails 320 are fixedly connected to the upper side of the base plate 1. Two sliders 321 are slidably connected to the inner side of the guide rails 320. A vertical plate 322 is fixedly connected to the upper side of each slider 321. A movable plate 323 is fixedly connected to the outer side of each vertical plate 322. A control rod 327 is provided on the outer side of each of the front and rear vertical plates 322. A stabilizing plate 328 is fixedly connected to one end of each control rod 327, and an L-shaped plate 329 is fixedly connected to the other end of each control rod 327. Side plates 330 are fixedly connected to the outer side of each of the front and rear L-shaped plates 329. A connecting frame 331 is fixedly connected to the outer side of each vertical plate 322. A control shaft 332 is rotatably connected to the upper side of the connecting frame 331. A rotating plate 333 is fixedly connected to the upper end of the control shaft 332. Two linkage plates 334 are rotatably connected to the upper side of the rotating plate 333. A mounting rod 335 is fixedly connected to the upper side of the base plate 1. The mounting rod 335 is rotatably connected to the side plate 330. A gear 336 is fixedly connected to the lower end of the control shaft 332. A support plate 338 is fixedly connected to the upper side of the base plate 1. A toothed plate 337 that meshes with the gear 336 is fixedly connected to the upper side of the support plate 338. Two mounting blocks 324 are fixedly connected to the upper side of the base plate 1. A bidirectional screw 326 is rotatably connected between the two mounting blocks 324. The two ends of the bidirectional screw 326 are provided with opposite threads. The two ends of the bidirectional screw 326 are respectively threaded to the two side moving plates 323. A motor 325 is fixedly connected to the outer side of the mounting block 324. The stabilizing plate 328 and the clamping plate 315 are both made of rubber material. The clamping plate 315 is set with an arc structure. The control rod 327 is slidably connected to the upright plate 322.

[0022] Before machining the gear disc body 2, the gear disc body 2 is fitted onto the outside of the rotating cylinder 312, and the gear disc body 2 contacts the contact plate 313. First, the air pump 39 is started, and airflow is introduced into the rotating pipe 32 and flows into the rotating cylinder 312. The airflow pushes the piston disc 318 to move, and the piston disc 318 drives the inclined plate 316 to rotate. The inclined plate 316 drives the moving rod 314 to move. Due to the circumferential array arrangement of multiple inclined plates 316, multiple moving rods 314 expand outward. The moving rods 314 drive the clamping plate 315 to move, so that the clamping plate 315 limits the gear disc body 2, thus initially limiting the gear disc body 2. Then, the second motor 325 is started. The second motor 325 drives the bidirectional screw 326 to rotate. The bidirectional screw 326 drives the two moving plates 323 to move closer to each other. The moving plates 323 drive the vertical plate 322 to move, and the vertical plate 322 drives... The stabilizing plate 328 moves, causing the stabilizing plates 328 on both sides to move closer to the gear disc body 2. At the same time, the upright plate 322 drives the connecting frame 331 to move, and the connecting frame 331 drives the gear 336 on the control shaft 332 to move. Under the action of the gear plate 337, the gear 336 rotates, and the gear 336 drives the control shaft 332 to rotate. The control shaft 332 drives the rotating plate 333 to rotate, and the rotating plate 333 drives the linkage plate 334 to rotate. Under the action of the mounting rod 335, the side plates 330 on the front and rear sides move closer to each other. The side plates 330 drive the L-shaped plate 329 to move, and the L-shaped plate 329 drives the control rod 327 to move. The control rod 327 drives the stabilizing plate 328 to move. The stabilizing plates 328 on the front and rear sides move closer to each other, which makes it easier for the stabilizing plate 328 to limit the gear disc body 2 again, increasing the stability of the gear disc body 2 during processing. Example

[0023] Based on Example 1, such as Figure 3 As shown, a milling machine for gear disc machining includes a base plate 1 and a gear disc body 2. A fixing frame 4 is fixedly connected to the upper side of the base plate 1, and a hydraulic cylinder 5 is fixedly connected to the upper side of the fixing frame 4. An electric track 6 is fixedly connected to the lower output end of the hydraulic cylinder 5. A guide block 7 is slidably connected to the inner side of the electric track 6, and a milling cutter 8 is fixedly connected to the lower side of the guide block 7. A limit unit 3 is provided on the upper side of the base plate 1. The limit unit 3 includes a fixing plate 31, which is fixedly connected to the upper side of the base plate 1. A rotating tube 32 is rotatably connected to the front side of the fixing plate 31. A fixed plate 33 is fixedly connected to the front end of the gear disc 33. A rotating cylinder 312 is fixedly connected to the front side of the fixed plate 33. A contact plate 313 is fixedly connected to the outer side of the rotating cylinder 312. Multiple moving rods 314 are provided on the outer side of the rotating cylinder 312. A clamping plate 315 is fixedly connected to one end of the moving rod 314. When machining the gear disc body 2, the hydraulic cylinder 5 is controlled to drive the electric track 6 to descend. The electric track 6 drives the milling cutter 8 to descend. The electric track 6 is also controlled to drive the guide block 7 to move back and forth. The guide block 7 drives the milling cutter 8 to move back and forth, so that the milling cutter 8 can machine the gear disc body 2.

[0024] Two guide rails 320 are fixedly connected to the upper side of the base plate 1. Two sliders 321 are slidably connected to the inner side of the guide rails 320. A vertical plate 322 is fixedly connected to the upper side of each slider 321. A movable plate 323 is fixedly connected to the outer side of each vertical plate 322. A control rod 327 is provided on the outer side of each of the front and rear vertical plates 322. A stabilizing plate 328 is fixedly connected to one end of each control rod 327, and an L-shaped plate 329 is fixedly connected to the other end of each control rod 327. Side plates 330 are fixedly connected to the outer side of each of the front and rear L-shaped plates 329. The outer side of the vertical plate 322 is fixedly... A connecting frame 331 is fixedly connected, and a control shaft 332 is rotatably connected to the upper side of the connecting frame 331. A rotating plate 333 is fixedly connected to the upper end of the control shaft 332. Two linkage plates 334 are rotatably connected to the upper side of the rotating plate 333. An installation rod 335 is fixedly connected to the upper side of the linkage plate 334. The installation rod 335 is rotatably connected to the side plate 330. A gear 336 is fixedly connected to the lower end of the control shaft 332. A support plate 338 is fixedly connected to the upper side of the base plate 1. A toothed plate 337 that meshes with the gear 336 is fixedly connected to the upper side of the support plate 338.

[0025] Multiple movable rods 314 are rotatably connected to inclined plates 316 on their lower outer sides. A rotating block 317 is rotatably connected to the outer side of the inclined plate 316. A piston disc 318 is fixedly connected to the rear side of the rotating block 317. A spring 319 is fixedly connected between the outer side of the piston disc 318 and the inner wall of the rotating cylinder 312. An air pump 39 and a motor 38 are fixedly connected to the rear side of the fixed plate 31. A conveying pipe 310 is fixedly connected between the air pump 39 and the fixed plate 31. An exhaust valve 311 is provided on the outer side of the conveying pipe 310. The conveying pipe 310 communicates with a rotating pipe 32. A gear 35 is fixedly connected to the outer side of the rotating pipe 32. The front of the fixed plate 31... A rotating shaft 36 is rotatably connected to the side. A gear 37, which meshes with gear 35, is fixedly connected to the outside of the rotating shaft 36. After processing, the exhaust valve 311 is controlled to discharge the gas, and the piston disc 318 is reset under the elastic force of the spring 319, which facilitates the separation of the clamping plate 315 from the gear disc body 2 and the extraction of the gear disc body 2. During processing, the motor 38 is started, which drives the rotating shaft 36 to rotate. The rotating shaft 36 drives gear 37 to rotate, gear 37 drives gear 35 to rotate, gear 35 drives the rotating tube 32 to rotate, and the rotating tube 32 drives the gear disc body 2 to rotate, which facilitates processing.

[0026] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0027] Working principle: When machining the gear disc body 2, the hydraulic cylinder 5 drives the electric track 6 to descend, the electric track 6 drives the milling cutter 8 to descend, and the electric track 6 drives the guide block 7 to move back and forth. The guide block 7 drives the milling cutter 8 to move back and forth, so that the milling cutter 8 can machine the gear disc body 2. During the machining process, the motor 1 38 is started, the motor 1 38 drives the rotating shaft 36 to rotate, the rotating shaft 36 drives the gear 2 37 to rotate, the gear 2 37 drives the gear 1 35 to rotate, the gear 1 35 drives the rotating tube 32 to rotate, and the rotating tube 32 drives the gear disc body 2 to rotate, which facilitates the machining.

[0028] Before machining the gear disc body 2, the gear disc body 2 is fitted onto the outside of the rotating cylinder 312, and the gear disc body 2 contacts the contact plate 313. First, the air pump 39 is started, and airflow is introduced into the rotating pipe 32 and flows into the rotating cylinder 312. The airflow pushes the piston disc 318 to move, and the piston disc 318 drives the inclined plate 316 to rotate. The inclined plate 316 drives the moving rod 314 to move. Due to the circumferential array arrangement of multiple inclined plates 316, multiple moving rods 314 expand outward. The moving rods 314 drive the clamping plate 315 to move, so that the clamping plate 315 limits the gear disc body 2, thus initially limiting the gear disc body 2. Then, the second motor 325 is started. The second motor 325 drives the bidirectional screw 326 to rotate. The bidirectional screw 326 drives the two moving plates 323 to move closer to each other. The moving plates 323 drive the vertical plate 322 to move, and the vertical plate 322 drives... The stabilizing plate 328 moves, causing the stabilizing plates 328 on both sides to move closer to the gear disc body 2. At the same time, the upright plate 322 drives the connecting frame 331 to move, and the connecting frame 331 drives the gear 336 on the control shaft 332 to move. Under the action of the gear plate 337, the gear 336 rotates, and the gear 336 drives the control shaft 332 to rotate. The control shaft 332 drives the rotating plate 333 to rotate, and the rotating plate 333 drives the linkage plate 334 to rotate. Under the action of the mounting rod 335, the side plates 330 on the front and rear sides move closer to each other. The side plates 330 drive the L-shaped plate 329 to move, and the L-shaped plate 329 drives the control rod 327 to move. The control rod 327 drives the stabilizing plate 328 to move. The stabilizing plates 328 on the front and rear sides move closer to each other, which makes it easier for the stabilizing plate 328 to limit the gear disc body 2 again, increasing the stability of the gear disc body 2 during processing.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0030] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A milling machine for machining gear discs, comprising a base plate (1) and a gear disc body (2), characterized in that: A fixing frame (4) is fixedly connected to the upper side of the base plate (1), and a hydraulic cylinder (5) is fixedly connected to the upper side of the fixing frame (4). An electric track (6) is fixedly connected to the lower output end of the hydraulic cylinder (5). A guide block (7) is slidably connected to the inner side of the electric track (6). A milling cutter (8) is fixedly connected to the lower side of the guide block (7). A limit unit (3) is provided on the upper side of the base plate (1). The limit unit (3) includes a fixing plate (31). Fixedly connected to the upper side of the base plate (1), the front side of the fixed plate (31) is rotatably connected to the rotating tube (32), the front end of the rotating tube (32) is fixedly connected to the fixed plate (33), the front side of the fixed plate (33) is fixedly connected to the rotating cylinder (312), the outer side of the rotating cylinder (312) is fixedly connected to the contact plate (313), the outer side of the rotating cylinder (312) is provided with multiple moving rods (314), and one end of the moving rod (314) is fixedly connected to the clamping plate (315).

2. The milling equipment for gear disc machining according to claim 1, characterized in that: Two guide rails (320) are fixedly connected to the upper side of the base plate (1). Two sliders (321) are slidably connected to the inner side of the guide rails (320). A vertical plate (322) is fixedly connected to the upper side of the sliders (321) on both sides. A movable plate (323) is fixedly connected to the outer side of the vertical plate (322). A control rod (327) is provided on the outer side of the vertical plate (322) on both the front and rear sides. A stabilizing plate (328) is fixedly connected to one end of the control rod (327). An L-shaped plate (329) is fixedly connected to the other end of the control rod (327). A side plate (330) is fixedly connected to the outer side of the L-shaped plate (329) on both the front and rear sides.

3. The milling equipment for gear disc machining according to claim 2, characterized in that: A connecting frame (331) is fixedly connected to the outer side of the upright plate (322). A control shaft (332) is rotatably connected to the upper side of the connecting frame (331). A rotating plate (333) is fixedly connected to the upper end of the control shaft (332). Two linkage plates (334) are rotatably connected to the upper side of the rotating plate (333). An installation rod (335) is fixedly connected to the upper side of the linkage plate (334). The installation rod (335) is rotatably connected to the side plate (330).

4. A gear milling device for gear disc machining according to claim 3, characterized in that: The lower end of the control shaft (332) is fixedly connected to a gear three (336), the upper side of the base plate (1) is fixedly connected to a support plate (338), and the upper side of the support plate (338) is fixedly connected to a toothed plate (337) that meshes with the gear three (336).

5. A milling machine for machining gear discs according to claim 3, characterized in that: Two mounting blocks (324) are fixedly connected to the upper side of the base plate (1). A bidirectional screw (326) is rotatably connected between the two mounting blocks (324). The two ends of the bidirectional screw (326) are provided with opposite threads. The two ends of the bidirectional screw (326) are respectively threaded to the two side moving plates (323). A motor (325) is fixedly connected to the outer side of the mounting block (324).

6. A milling machine for machining gear discs according to claim 5, characterized in that: The stabilizing plate (328) and the clamping plate (315) are both made of rubber material. The clamping plate (315) has an arc-shaped structure. The control rod (327) is slidably connected to the upright plate (322).

7. A milling machine for machining gear discs according to claim 1, characterized in that: An inclined plate (316) is rotatably connected to the outer side of the lower end of the plurality of moving rods (314). A rotating block (317) is rotatably connected to the outer side of the inclined plate (316). A piston disc (318) is fixedly connected to the rear side of the rotating block (317). A spring (319) is fixedly connected between the outer side of the piston disc (318) and the inner wall of the rotating cylinder (312).

8. A milling machine for machining gear discs according to claim 7, characterized in that: An air pump (39) and a motor (38) are fixedly connected to the rear side of the fixed plate (31). A delivery pipe (310) is fixedly connected between the air pump (39) and the fixed plate (31). An exhaust valve (311) is provided on the outside of the delivery pipe (310). The delivery pipe (310) is connected to a rotating pipe (32). A gear (35) is fixedly connected to the outside of the rotating pipe (32). A rotating shaft (36) is rotatably connected to the front side of the fixed plate (31). A gear (37) that meshes with the gear (35) is fixedly connected to the outside of the rotating shaft (36).

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