Bevel gear positioning machining tooling

Abstract

The application discloses a bevel gear positioning machining tool, and belongs to the technical field of workpiece loading devices. The bevel gear positioning machining tool comprises a transmission assembly. The transmission assembly comprises a driven shaft arranged horizontally. A socket is formed in the end of the driven shaft. The socket extends along the radial direction of the driven shaft and forms a separate support piece at the end of the driven shaft. A stabilizing box comprises a secondary shaft. The secondary shaft and the driven shaft are coaxially arranged. The secondary shaft is opposite to one end of the driven shaft and is provided with a taper head matched with the socket. The improvement of the elastic support piece at the end of the driven shaft, the taper head on the secondary shaft and the gear key cooperation can generate deformation of the support piece by extrusion of the taper head to tighten the workpiece. At the same time, the gear key fills the gap to achieve meshing and clamping. The cantilever support is converted into double-end support, the shafting rigidity is significantly improved, the transmission slip is prevented, the eccentric rotation and vibration caused by the suspension installation of the large-section bevel gear with a large bevel angle are effectively avoided, and the surface smoothness of the tooth surface machining is ensured.

Description

Technical Field

[0001] This invention belongs to the technical field of workpiece loading devices, and specifically relates to a bevel gear positioning and machining fixture. Background Technology

[0002] Among various bevel gears, large pitch bevel gears (especially crown gears or large-angle bevel gears with a pitch cone angle of ≥ 90°) face significant technical challenges in machining due to their unique geometry. Compared to ordinary bevel gears, large pitch bevel gears have a larger radius of curvature on their tooth surface, and their tooth profile tends to be planar or concave, which places extremely high demands on cutting stability and positioning accuracy during machining.

[0003] Existing general-purpose machining fixtures often have limitations when dealing with large-pitch bevel gears, making it difficult to meet the requirements for high-precision surface quality. In particular, the direction of the cutting force of large-pitch bevel gears differs significantly from that of ordinary bevel gears during the cutting process. Furthermore, due to the large tooth surface development length, traditional fixtures often directly fix the workpiece to the suspended end of the shaft when installing such workpieces. During the finishing stage, the suspended shaft cannot provide sufficient support rigidity for the large-pitch bevel gear, and even slight vibrations will form obvious chatter marks on the tooth surface, directly leading to excessive surface roughness and failing to meet the requirements for high surface accuracy. In view of this, a bevel gear positioning machining fixture is provided. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a bevel gear positioning and machining fixture.

[0005] The technical solution adopted to solve the above technical problems is: A bevel gear positioning and machining fixture, comprising: A transmission assembly, comprising a horizontally arranged driven shaft, wherein the driven shaft has a socket at its end, and the socket extends radially along the driven shaft to form independent support plates at the end of the driven shaft; A stabilizing housing includes a secondary shaft, which is coaxially arranged with a driven shaft. The end of the secondary shaft facing the driven shaft is provided with a conical head that mates with a connector. The secondary shaft is capable of axial translation. A milling assembly, comprising a first precision cutter group and a second precision cutter group, wherein the first precision cutter group includes a spindle horizontally arranged directly above the driven shaft, the spindle being connected to a power source, a cutter head being mounted at the end of the spindle, and the spindle driving the driven shaft to rotate; the second precision cutter group includes a rotating shaft whose axis is perpendicular to the axis of the driven shaft, the rotating shaft having helical teeth located directly below the driven shaft, and milling grooves being formed on the outer circumference of the helical teeth; During the finishing of the meshing groove and clearance groove of the large-pitch bevel gear, the countershaft is axially moved away from the driven shaft, and the main body of the large-pitch bevel gear is fitted onto the end of the driven shaft. The end of the driven shaft has a stepped annular groove to facilitate the installation of the driven shaft. Then, the countershaft is axially moved closer to the driven shaft, and the cone head is inserted into the socket. The outer diameter of the side wall of the cone head gradually increases from the end, while the inner diameter of the support plate gradually decreases from the end. This causes the support plates to deform axially, thus tightening and fixing the main body, ensuring that the main body and the driven shaft rotate synchronously. The cutter head presses against the inner wall of the main body's circumferential side wall. The clearance groove of the part is milled, and the helical gear rotates synchronously by meshing with the meshing groove of the main body's circumferential side wall. The surface of the meshing groove is milled by the milling groove to complete the fine surface treatment. At the same time, the secondary shaft and the driven shaft are connected into a whole shaft. Both the secondary shaft and the driven shaft are rotatably installed by bearings. After the free ends of the secondary shaft and the driven shaft are connected, this shaft has rotational support at both ends of the main body, which can ensure the stable rotation of the driven shaft and avoid eccentric rotation caused by the installation position at the shaft end. This ensures the machining accuracy of the cutter head and the helical gear, and makes the surface finish of the clearance groove and the meshing groove higher.

[0006] Furthermore, a notch is formed between adjacent support pieces, and a toothed key is provided on the circumferential sidewall of the cone head, the toothed key corresponding to the notch contour.

[0007] The above technical solution discloses a specific configuration of a support plate. The support plate is formed by opening an insertion port at the end of the driven shaft, so it is a tooth-like structure with the end suspended and extended. Due to the metallic properties of the driven shaft itself, the support plate has a certain elasticity. When subjected to external force, it can undergo stress deformation. At the same time, when it is freed from external force, it can spring back to its original position. While tightening the main body, it facilitates the installation and disassembly of the main body. The setting of the tooth key utilizes the horizontal extension of the support plate to change the transmission between the secondary shaft and the driven shaft from contact friction transmission to meshing and snap-fit ​​transmission. The transmission stability is better, and it avoids slippage between the secondary shaft and the driven shaft. The tooth key can also fill the gap, making the engagement between the secondary shaft and the driven shaft tighter and forming a more complete shaft.

[0008] Furthermore, the finishing tool assembly also includes a bushing, which is fitted and installed on the middle of the outer side of the spindle. A lifting device is installed at the bottom of the bushing, a middle plate is installed at the bottom of the lifting device, a support frame is installed at the end of the middle plate, and an arc plate that mates with the bushing is provided on the upper part of the support frame.

[0009] Through the above technical solution, to facilitate the assembly and disassembly of the large-pitch bevel gear, since the clearance groove is located in the middle of the main body and is a concave groove, if the cutter head is to be machined into the clearance groove, it will overlap with the main body to a certain extent. Therefore, a lifting device is required. During installation, the lifting device raises the entire spindle a certain distance, so that the large-pitch bevel gear can be smoothly fitted onto the end of the driven shaft. When machining the clearance groove, the lifting device needs to be shortened, driving the cutter head down a certain distance to enter the clearance groove and complete the finishing of the clearance groove surface. The lifting device and the spindle are connected by a bushing. The bushing and the spindle are coaxially fitted and connected by bearings to ensure that the spindle is not affected while being raised and lowered. At the same time, the top surface shape of the arc plate matches the contour of the lower outer part of the bushing, which can stably support the bushing through a large contact surface when the lifting device is shortened. Throughout the machining process, the lifting device is in a retracted state to ensure that the bushing is always pressed against the upper surface of the arc plate and to ensure the stability of the spindle position.

[0010] Furthermore, a protective box is provided on the outside of the main shaft and the driven shaft, the protective box is provided with a clearance hole corresponding to the position of the main shaft, and a shaft seat is installed on the lower part of the protective box corresponding to the position of the driven shaft.

[0011] Through the above technical solution, in order to ensure the stable operation of the main shaft and driven shaft, the protective box can prevent foreign objects from entering the rotating and meshing positions, ensuring transmission stability. At the same time, because the main shaft needs to float up and down, a clearance hole is opened in the side wall of the protective box during processing to ensure that the main shaft can move up and down smoothly. A protective component, such as a deformable leather sleeve, can be installed at the clearance hole position. The leather sleeve seals the entire clearance hole and can also deform to avoid affecting the up and down floating of the main shaft. Meanwhile, a bearing can be installed in the shaft seat to provide rotational support for the driven shaft.

[0012] Furthermore, an external gear is installed at the end of the main shaft away from the cutter head, a drive wheel is installed in the middle section of the main shaft, and a driven wheel is installed on the driven shaft at the position corresponding to the drive wheel.

[0013] Through the above technical solution, in order to enable the large-pitch bevel gear to rotate during machining, it is not solely reliant on the rotation of the helical teeth. This is because if the resistance when the helical teeth drive the main body to rotate is too large, it will increase the feed depth of the milling groove and cause over-machining of the meshing groove. The main shaft is driven to rotate through an external gear, and the main shaft drives the driven shaft to rotate. The driving and driven gears are made of spur gears to ensure stable meshing when the main shaft is raised and lowered. By matching the rotation speed with the rotating shaft, stress-free meshing between the helical teeth and the main body can be achieved, ensuring that the milling groove can be centered for fine milling of the meshing groove and improving the milling accuracy.

[0014] Furthermore, the finishing tool assembly two also includes a mounting bracket, the mounting bracket having a chip discharge port in the middle, a coupling being installed at the end of the rotating shaft, and a rotary driver being externally connected to the coupling.

[0015] Through the above technical solution, in order to ensure that the chips generated during milling are discharged smoothly, the shaft is installed by rotating and suspending the bearings at both ends. The middle part is suspended so that the chips can fall down smoothly. In addition, the external rotary drive of the coupling must be matched with the power source connected to the main shaft to ensure that the rotation speeds of the shaft and the driven shaft correspond to each other, and to prevent the milling groove from being unable to be centered and milling the meshing groove due to mismatched speeds.

[0016] Furthermore, the stabilizer also includes a housing, which is rotatably connected to the sub-shaft via a bearing, and a linear module is mounted on the lower part of the housing.

[0017] With the above technical solution, in order to realize the translation of the secondary shaft, the secondary shaft is rotatably mounted on the vertical side wall of the housing through bearings. The moving direction of the linear module is parallel to the axis of the secondary shaft, so the secondary shaft can be driven to translate axially by the linear module.

[0018] Furthermore, a bevel gear one is installed at the end of the secondary shaft away from the driven shaft, a vertical shaft is vertically installed in the middle of the housing, and a bevel gear two that meshes with the bevel gear one is installed on the outer wall of the vertical shaft.

[0019] With the above technical solution, since the secondary shaft will be subjected to axial compressive force when it engages with the driven shaft, a bevel gear one is installed at the end of the secondary shaft and meshes with bevel gear two. This allows the axial force on the secondary shaft to be transmitted to the vertical shaft through the meshing of bevel gear one and bevel gear two, which can provide axial support force for the secondary shaft and prevent the bearing between the housing and the secondary shaft from being subjected to a large axial force continuously.

[0020] Furthermore, an adapter frame is installed in the middle of the housing, and an angular contact ball bearing is built into the adapter frame. The angular contact ball bearing is coaxially assembled and connected with the vertical shaft.

[0021] Through the above technical solution, in order to ensure the stable rotation of the vertical shaft, since the vertical shaft is installed vertically, the central hole axis of the adapter is also vertical. An angular contact ball bearing is installed in the central hole. The angular contact ball bearing can withstand a large axial force and can bear the axial pressure caused by the weight of the vertical shaft, thus ensuring the vertical shaft rotates vertically and stably.

[0022] Furthermore, a counterweight wheel is installed at the top of the vertical shaft, the counterweight wheel is located above the adapter frame, and a flat bearing is installed between the lower end of the vertical shaft and the bottom surface of the housing.

[0023] With the above technical solution, when the vertical shaft rotates, it can drive the counterweight wheel to rotate synchronously. In this way, when radial vibration occurs on the driven shaft, the vibration can be transmitted to the vertical shaft through the secondary shaft. The inertia generated by the rotation of the counterweight wheel on the vertical shaft is used to cancel the vibration, ensuring the rotational stability of the driven shaft, thereby ensuring the rotational stability of the main body and ensuring the machining quality of the meshing groove and the clearance groove.

[0024] The beneficial effects of this invention are as follows: This invention improves the fit between the elastic support plate at the end of the driven shaft and the cone head and key on the secondary shaft. The cone head squeezes the support plate to generate deformation and tighten the workpiece, while the key fills the gap to achieve meshing and locking. This transforms the cantilever support into a double-end support, significantly improving the rigidity of the shaft system and preventing transmission slippage. It effectively avoids eccentric rotation and vibration caused by the suspended installation of the large-pitch bevel gear, thereby ensuring the surface finish of the gear teeth. This invention improves the meshing of the first bevel gear at the end of the secondary shaft with the second bevel gear on the vertical shaft. By using bevel gear transmission, the axial compressive force on the secondary shaft is transmitted to the vertical shaft. Combined with the inertia generated by the rotation of the counterweight wheel at the top of the vertical shaft, the secondary shaft is provided with axial support and the radial vibration is counteracted by the rotational inertia. This further ensures the stability of the driven shaft and the workpiece during high-speed rotation and avoids the formation of vibration marks on the tooth surface by micro-amplitude vibration. This invention improves the transmission by meshing the driving wheel on the main shaft and the driven wheel on the driven shaft. It uses spur gear transmission to force the matching of the rotational speeds of the main shaft and the driven shaft, achieving stress-free synchronous meshing between the helical teeth and the workpiece meshing groove. This prevents the problem of high resistance and over-machining caused by relying solely on the helical teeth to drive the workpiece to rotate. It ensures that the milling groove can be precisely centered to perform fine milling of the meshing groove, thus improving machining accuracy. Attached Figure Description

[0025] Figure 1 This is a first-view structural diagram of the present invention; Figure 2 This is a cross-sectional schematic diagram of the present invention; Figure 3 This is a schematic diagram of the internal structure of the stabilization chamber of the present invention; Figure 4 This is a schematic diagram of the structure between the driving component and the stabilizing component of the present invention; Figure 5 This is a schematic diagram of the driven shaft and the secondary shaft of the present invention in the engagement state; Figure 6 This is a schematic diagram of the structure between the driving component and the stabilizing component of the present invention; Figure 7 This is a schematic diagram showing the disassembled relationship between the main shaft, support frame, and bushing of the present invention; Figure 8 This is a schematic diagram of the structure between the finishing tool assembly and the large-pitch bevel gear of the present invention.

[0026] Reference numerals: 1. Transmission assembly; 11. Driven shaft; 12. Driven wheel; 13. Shaft seat; 14. Insert; 15. Support plate; 2. Stabilizer box; 21. Linear module; 22. Countershaft; 221. Gear key; 222. Cone head; 23. Bevel gear II; 24. Vertical shaft; 25. Counterweight wheel; 26. Adapter frame; 27. Housing; 28. Bevel gear I; 3. Finishing tool set I; 31. Main spindle; 3 2. Drive wheel; 33. External gear; 34. Cutter head; 35. Support frame; 351. Arc plate; 352. Middle plate; 36. Bushing; 361. Lifter; 37. Protective box; 4. Finishing tool set two; 41. Rotary shaft; 42. Helical gear; 43. Milling groove; 44. Mounting bracket; 45. Coupling; 5. Large-pitch bevel gear; 51. Main body; 52. Meshing groove; 53. Clearance groove. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0028] like Figure 1 - Figure 8 As shown, this embodiment provides a bevel gear positioning and machining fixture. Addressing the practical scenario where high surface finish is required for the meshing groove 52 and clearance groove 53 of the large-pitch bevel gear 5, a specific configuration is provided to solve the problem of insufficient stability in controlling the fine milling quality of the meshing groove 52 and clearance groove 53 in existing solutions. The fixture includes: The transmission assembly 1 includes a horizontally arranged driven shaft 11, with a socket 14 at the end of the driven shaft 11. The socket 14 extends radially along the driven shaft 11 and forms independent support plates 15 at the end of the driven shaft 11. The stabilizer box 2 includes a secondary shaft 22, which is coaxially arranged with the driven shaft 11. The secondary shaft 22 is provided with a conical head 222 that mates with the socket 14 at one end facing the driven shaft 11. The secondary shaft 22 can translate along the axial direction. The milling assembly includes a first milling tool group 3 and a second milling tool group 4. The first milling tool group 3 includes a main spindle 31 horizontally arranged directly above the driven shaft 11. The main spindle 31 is connected to a power source. A cutter head 34 is installed at the end of the main spindle 31. The main spindle 31 drives the driven shaft 11 to rotate. The second milling tool group 4 includes a rotating shaft 41 whose axis is perpendicular to the axis of the driven shaft 11. The rotating shaft 41 is provided with a helical tooth 42 located directly below the driven shaft 11. A milling groove 43 is opened on the outer circumference of the helical tooth 42. The working principle of this embodiment is as follows: During the finishing of the meshing groove 52 and clearance groove 53 of the large-pitch bevel gear 5, the countershaft 22 is axially moved away from the driven shaft 11, and the main body 51 of the large-pitch bevel gear 5 is fitted onto the end of the driven shaft 11. The end of the driven shaft 11 is provided with a stepped annular groove to facilitate the installer's installation of the driven shaft 11. Subsequently, the countershaft 22 is axially moved closer to the driven shaft 11, and the cone head 222 is inserted into the insertion port 14. The outer diameter of the side wall of the cone head 222 gradually increases from the end, compressing the inner wall of the support plate 15, which gradually decreases from the end. This causes the support plate 15 to be axially compressed and deformed away from each other, thereby tightening and fixing the main body 51, ensuring that the main body 51 and the driven shaft 11 rotate synchronously. The cutter head 34 is positioned on the circumference of the main body 51. The clearance groove 53 in the middle of the side wall is milled, and the helical tooth 42 rotates synchronously by meshing with the meshing groove 52 on the circumferential side wall of the main body 51. The surface of the meshing groove 52 is milled by the milling groove 43 to complete the fine surface treatment. At the same time, the secondary shaft 22 and the driven shaft 11 are connected to form a whole shaft. Both the secondary shaft 22 and the driven shaft 11 are rotatably installed by bearings. After the free ends of the secondary shaft 22 and the driven shaft 11 are connected, this shaft has rotational support at both ends of the main body 51, which can ensure the stable rotation of the driven shaft 11 and avoid eccentric rotation caused by the installation position at the shaft end. This ensures the machining accuracy of the cutter head 34 and the helical tooth 42, and makes the surface finish of the clearance groove 53 and the meshing groove 52 higher.

[0029] In a further embodiment, a specific configuration of the support piece 15 is disclosed, referring to... Figure 3 , Figure 4 and Figure 5 The adjacent support plates 15 form a notch, and the circumferential sidewall of the cone head 222 is provided with a toothed key 221, which corresponds to the contour of the notch. The support plate 15 is formed by opening a slot 14 at the end of the driven shaft 11, so it is a structure similar to a tooth with the end suspended and extended. Due to the metallic properties of the driven shaft 11 itself, the support plate 15 has a certain elasticity. When it is squeezed by external force, it can undergo stress deformation. At the same time, when it is freed from external force, it can also spring back to its original position. While tightening the main body 51, it is convenient to install and disassemble the main body 51. The setting of the toothed key 221 is to use the horizontal extension of the support plate 15 to change the transmission from contact friction transmission between the secondary shaft 22 and the driven shaft 11 to meshing and snapping transmission. The transmission is more stable and avoids the secondary shaft 22 and the driven shaft 11 slipping against each other. The toothed key 221 can also fill the notch, so that the secondary shaft 22 and the driven shaft 11 are more tightly joined and form a more complete shaft.

[0030] In a further embodiment, to facilitate the disassembly and assembly of the large-pitch bevel gear 5, refer to... Figure 6 and Figure 7The finishing tool set 3 also includes a bushing 36, which is fitted onto the outer middle of the spindle 31. A lifting device 361 is installed at the bottom of the bushing 36, and a middle plate 352 is installed at the bottom of the lifting device 361. A support frame 35 is installed at the end of the middle plate 352, and an arc plate 351 that mates with the bushing 36 is provided on the upper part of the support frame 35. Because the clearance groove 53 is located in the middle of the main body 51 and is a concave groove, if the tool head 34 is to machine the clearance groove 53, it will overlap with the main body 51 to a certain extent. Therefore, a lifting device 361 is required. During installation, the lifting device 361 raises the entire spindle 31 a certain distance, so that the large-pitch bevel gear 5 can be smoothly fitted onto the end of the driven shaft 11. When moving the tool head 34 to the clearance groove 53, the lifting device 361 needs to be shortened, which will drive the tool head 34 to move down a certain distance into the clearance groove 53 to complete the finishing of the surface of the clearance groove 53. The lifting device 361 is connected to the spindle 31 through the bushing 36. The bushing 36 and the spindle 31 are coaxially fitted and connected by bearings to ensure that the rotation of the spindle 31 is not affected while it is being raised and lowered. At the same time, the top surface shape of the arc plate 351 matches the contour of the lower outer part of the bushing 36, which can stably support the bushing 36 through a large contact surface when the lifting device 361 is shortened. Throughout the entire processing, the lifting device 361 is in a retracted state to ensure that the bushing 36 is always pressed against the upper surface of the arc plate 351, ensuring the stability of the position of the spindle 31.

[0031] In a further embodiment, to ensure the stable operation of the main shaft 31 and the driven shaft 11, refer to Figure 2 and Figure 4 The main spindle 31 and driven shaft 11 are covered by a protective box 37. The protective box 37 has a clearance hole corresponding to the position of the main spindle 31. The lower part of the protective box 37 is equipped with a bearing seat 13 corresponding to the position of the driven shaft 11. The protective box 37 can prevent foreign objects from entering the rotating and meshing positions, ensuring transmission stability. At the same time, because the main spindle 31 needs to float up and down, clearance holes are opened in the side wall of the protective box 37 during processing to ensure that the main spindle 31 can move up and down smoothly. Protective components, such as deformable leather sleeves, can be installed at the clearance hole positions. The leather sleeves seal the entire clearance hole and can also deform to avoid affecting the up and down floating of the main spindle 31. Meanwhile, bearings can be installed in the bearing seat 13 to provide rotational support for the driven shaft 11.

[0032] In a further embodiment, to enable the large-pitch bevel gear 5 to rotate during machining, it does not solely rely on the rotation of the helical teeth 42. This is because if the resistance from the helical teeth 42 pushing the main body 51 to rotate is significant, it will increase the feed depth of the milling groove 43, causing over-machining of the meshing groove 52. (Refer to...) Figure 4An external gear 33 is installed at the end of the spindle 31 away from the cutter head 34. A drive wheel 32 is installed in the middle section of the spindle 31. A driven wheel 12 is installed on the driven shaft 11 corresponding to the position of the drive wheel 32. The spindle 31 drives the driven shaft 11 to rotate. By matching the rotation speed with that of the rotating shaft 41, the helical gear 42 can mesh with the main body 51 without stress, ensuring that the milling groove 43 can be centered to perform fine milling on the meshing groove 52, thereby improving the milling accuracy.

[0033] In a further embodiment, to ensure the smooth removal of milling debris, refer to Figure 8 The finishing tool set 2 4 also includes a mounting bracket 44, which has a chip discharge port in the middle. A coupling 45 is installed at the end of the rotating shaft 41, and a rotary driver is connected to the coupling 45. The rotating shaft 41 is installed by rotating and suspending bearings at both ends, which allows the chips to fall smoothly downwards. Furthermore, the rotary driver connected to the coupling 45 must be matched with the power source connected to the spindle 31 to ensure that the rotation speeds of the rotating shaft 41 and the driven shaft 11 correspond to each other, preventing mismatch in rotation speeds from causing the milling groove 43 to be unable to be centered and mill the meshing groove 52.

[0034] In a further embodiment, to achieve the translation of the secondary axis 22, refer to Figure 3 The stabilizer box 2 also includes a housing 27, which is rotatably connected to the sub-shaft 22 via bearings. A linear module 21 is installed on the lower part of the housing 27. The sub-shaft 22 is rotatably mounted on the vertical side wall of the housing 27 via bearings. The moving direction of the linear module 21 is parallel to the axis of the sub-shaft 22, so the sub-shaft 22 can be driven to translate axially by the linear module 21.

[0035] In a further embodiment, refer to Figure 2 and Figure 3 A vertical shaft 24 is vertically arranged in the middle of the housing 27, and a second bevel gear 23 is fixed on the outer wall of the vertical shaft 24. A first bevel gear 28 that meshes with the second bevel gear 23 is installed at the end of the secondary shaft 22 away from the driven shaft 11. When the secondary shaft 22 engages with the driven shaft 11 and is subjected to axial compressive force, the axial force can be transmitted to the vertical shaft 24 through the meshing action of the first bevel gear 28 and the second bevel gear 23. The vertical shaft 24 provides axial support for the secondary shaft 22. This structure effectively shares the axial load borne by the bearing between the housing 27 and the secondary shaft 22, thereby avoiding damage to the bearing due to continuous excessive axial force.

[0036] In a further embodiment, to ensure stable rotation of the vertical axis 24, refer to Figure 2An adapter frame 26 is installed in the middle of the housing 27. An angular contact ball bearing is built into the adapter frame 26. The angular contact ball bearing is coaxially assembled and connected with the vertical shaft 24. Because the vertical shaft 24 is installed vertically, the axis of the central hole of the adapter frame 26 is also vertical. An angular contact ball bearing is installed in the central hole. The angular contact ball bearing can withstand a large axial force and can bear the axial pressure caused by the weight of the vertical shaft 24, ensuring that the vertical shaft 24 rotates vertically and stably.

[0037] Furthermore, referring to Figure 3 A counterweight wheel 25 is installed at the top of the vertical shaft 24, and the counterweight wheel 25 is located above the adapter frame 26. A plane bearing is provided between the lower end of the vertical shaft 24 and the bottom surface of the housing 27. When the vertical shaft 24 rotates, it can drive the counterweight wheel 25 to rotate synchronously. When the driven shaft 11 generates radial vibration, the vibration is transmitted to the vertical shaft 24 through the secondary shaft 22. At this time, the counterweight wheel 25 uses its rotational inertia to provide a damping effect to absorb and attenuate the vibration energy, thereby maintaining the rotational stability of the driven shaft 11 and the main body 51, and ultimately ensuring the machining accuracy of the meshing groove 52 and the clearance groove 53.

[0038] The above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention.

Claims

1. A bevel gear positioning and machining fixture, characterized in that, include: The transmission assembly (1) includes a driven shaft (11) that is rotatably mounted horizontally. The driven shaft (11) has a socket (14) at its end. The socket (14) extends radially along the driven shaft (11) and forms independent support plates (15) at the end of the driven shaft (11). The stabilizer box (2) includes a horizontally rotatable sub-shaft (22), which is coaxially arranged with the driven shaft (11). The sub-shaft (22) has a cone (222) that mates with the socket (14) at one end facing the driven shaft (11). The sub-shaft (22) can translate along the axial direction. The milling assembly includes a first precision cutter group (3) and a second precision cutter group (4). The first precision cutter group (3) includes a spindle (31) arranged horizontally above the driven shaft (11). The spindle (31) is connected to a power source. A cutter head (34) is installed at the end of the spindle (31). The spindle (31) drives the driven shaft (11) to rotate. The second precision cutter group (4) includes a rotating shaft (41) whose axis is perpendicular to the axis of the driven shaft (11). The rotating shaft (41) is provided with a helical tooth (42) located directly below the driven shaft (11). A milling groove (43) is provided on the outer circumference of the helical tooth (42).

2. The bevel gear positioning and machining fixture according to claim 1, characterized in that, The adjacent support pieces (15) form a notch, and the circumferential sidewall of the cone (222) is provided with a toothed key (221), which corresponds to the notch outline.

3. The bevel gear positioning and machining fixture according to claim 1, characterized in that, The finishing tool assembly (3) also includes a bushing (36), which is sleeved and installed on the middle of the outer side of the spindle (31). A lifting device (361) is installed at the bottom of the bushing (36), and a middle plate (352) is installed at the bottom of the lifting device (361). A support frame (35) is installed at the end of the middle plate (352), and an arc plate (351) that mates with the bushing (36) is provided on the upper part of the support frame (35).

4. The bevel gear positioning and machining fixture according to claim 3, characterized in that, The main shaft (31) and driven shaft (11) are covered with a protective box (37). The protective box (37) has a clearance hole corresponding to the position of the main shaft (31). The lower part of the protective box (37) is equipped with a bearing seat (13) corresponding to the position of the driven shaft (11).

5. The bevel gear positioning and machining fixture according to claim 4, characterized in that, A gear (33) is installed at the end of the main shaft (31) away from the cutter head (34), a drive wheel (32) is installed in the middle section of the main shaft (31), and a driven wheel (12) is installed on the driven shaft (11) corresponding to the position of the drive wheel (32).

6. The bevel gear positioning and machining fixture according to claim 1, characterized in that, The finishing tool set 2 (4) also includes a mounting bracket (44), which has a chip discharge port in the middle. A coupling (45) is installed at the end of the rotating shaft (41), and a rotary driver is connected to the coupling (45).

7. The bevel gear positioning and machining fixture according to claim 1, characterized in that, The stabilizer box (2) also includes a housing (27), which is rotatably connected to the sub-shaft (22) via a bearing, and a linear module (21) is installed on the lower part of the housing (27).

8. The bevel gear positioning and machining fixture according to claim 7, characterized in that, The secondary shaft (22) is equipped with a bevel gear (28) at the end away from the driven shaft (11), and a vertical shaft (24) is vertically installed in the middle of the housing (27). A bevel gear (23) that meshes with the bevel gear (28) is installed on the outer wall of the vertical shaft (24).

9. The bevel gear positioning and machining fixture according to claim 8, characterized in that, A transition frame (26) is installed in the middle of the housing (27). The transition frame (26) has an angular contact ball bearing inside, and the angular contact ball bearing is coaxially assembled and connected with the vertical shaft (24).

10. The bevel gear positioning and machining fixture according to claim 9, characterized in that, A counterweight wheel (25) is installed at the top of the vertical shaft (24), the counterweight wheel (25) is located above the adapter frame (26), and a plane bearing is installed between the lower end of the vertical shaft (24) and the bottom surface of the housing (27).

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