Automatic grinding device for worm gears of reduction motors

Abstract

The present application relates to the field of speed reduction motor processing, in particular to the worm face gear manufacturing automation fine grinding device for speed reduction motor, when two grinding wheel plates expand outward and swing to adapt to large spiral angle grinding, the angle area between the inner side wall surfaces of the two will form a gradually expanding cavity or gap, this area completely lacks any form of lateral support, which leads to the overall rigidity of the grinding wheel plate significantly decreasing, in the process of grinding large excess or high hardness material, insufficient rigidity will intensify the lateral vibration and radial displacement of the grinding wheel plate. The worm face gear manufacturing automation fine grinding device for speed reduction motor, the cross-sectional thickness of the support card gradually increases along the length direction, the support card can always tightly fill in the angle space between the inner side wall surfaces of the two grinding wheel plates, no matter how the angle changes, it can form stable support without gap, avoids the cavity or gap in the angle area, and enhances the lateral rigidity of the grinding wheel plate in the grinding process.

Description

Technical Field

[0001] This invention relates to the field of geared motor processing, specifically to an automated precision grinding device for manufacturing worm gears for geared motors. Background Technology

[0002] Geared motors are widely used in various industrial transmission fields, and their core transmission pair consists of a worm and a worm wheel (or worm gear). The machining accuracy of the helical tooth surface of the worm directly determines the transmission efficiency, load-bearing capacity, operational smoothness, and service life of the geared motor. Among these, precision grinding of the helical tooth surface of the worm is a key process to ensure the final machining accuracy.

[0003] Currently, precision grinding of worm gear helical teeth mainly employs profile grinding or single-sided grinding with a single grinding wheel, tooth by tooth. To improve processing efficiency, some devices have adopted a dual-grinding-wheel structure, with an adjustable tilt mechanism to allow the included angle between the two grinding wheels to accommodate different helix angles on both sides of the worm.

[0004] However, existing dual-wheel grinding devices with tilt adjustment function have the following technical problems in practical applications:

[0005] An elastic limiting structure is set at the outer wall surfaces of the two grinding wheels facing away from each other to provide basic lateral constraint. However, the position and force of the limiting structure are usually fixed. When the grinding wheel rotates around the swing axis to change its working angle, the contact state between the limiting structure and the outer wall surface of the grinding wheel changes, and it cannot provide stable support that adapts to the angle adjustment of the grinding wheel.

[0006] Secondly, when the two grinding wheels expand and oscillate outward to accommodate grinding with a large helix angle, the angled area between their inner sidewalls will form a gradually expanding cavity or gap. This area completely lacks any form of lateral support, resulting in a significant decrease in the overall stiffness of the grinding wheels. In the grinding process of large allowance or high hardness materials, insufficient stiffness will aggravate the lateral vibration and radial displacement of the grinding wheels, thereby affecting the surface quality and dimensional accuracy of the tooth surface, and in severe cases, even producing vibration marks. Summary of the Invention

[0007] The purpose of this invention is to provide an automated precision grinding device for manufacturing worm gears for geared motors, thereby solving the problems mentioned in the background art. To achieve the above objective, this invention provides the following technical solution: an automated precision grinding device for manufacturing worm gears for geared motors, comprising a processing platform for precision grinding of the helical tooth surface of the worm in the geared motor, the processing platform including a frame and an adjusting slide, the adjusting slide being used to support and position the worm to be processed, the frame being disposed above the adjusting slide, and a precision grinding assembly for precision grinding the worm tooth surface on the frame, the precision grinding assembly including a left drive half-shaft and a right drive half-shaft, both of which are rotatably mounted on the frame with their own axes as the rotation center lines, and a left grinding wheel and a right grinding wheel are respectively fixedly mounted at their ends.

[0008] Preferably, the input end of the left drive half-shaft is power-coupled with the power input shaft through a first cross shaft, and the horizontal journal of the first cross shaft forms a left swing axis. The end of the right drive half-shaft is mounted on the frame through a second cross shaft, and the horizontal journal of the second cross shaft forms a right swing axis. Both the left swing axis and the right swing axis extend horizontally and are perpendicular to the axes of the corresponding left drive half-shaft and right drive half-shaft, respectively.

[0009] Preferably, the frame is further provided with a grinding wheel tilt angle adjustment assembly for driving the left and right grinding wheels to swing around their respective swing axes in a vertical plane. A support base is fixedly connected to the frame, and a sliding seat is provided on the support base along the vertical direction perpendicular to the axis of the two grinding wheels. The grinding wheel tilt angle adjustment assembly is provided in two sets and is symmetrically arranged with the sliding seat as the central axis, corresponding to the left drive half shaft and the right drive half shaft respectively.

[0010] Preferably, the grinding wheel tilt adjustment assembly includes a sliding frame fixedly connected to the sliding seat, and adjustment frames are rotatably connected to the left and right drive half shafts respectively. The sliding frame and the adjustment frame are connected by a spherical hinge connecting rod to achieve motion transmission. The bearing seat is provided with a driving component for driving the sliding seat to slide vertically along the bearing seat.

[0011] Preferably, the bearing seat is provided with limit rod assemblies on the outer wall surfaces corresponding to the left and right grinding wheel disks, respectively. The limit rod assemblies continuously and elastically abut against the outer wall surfaces of the two grinding wheel disks. Both sets of limit rod assemblies include limit rods that are elastically telescopically configured. A spring element is integrated inside the limit rod, and a ball is hinged to the end of the limit rod through a hinge block.

[0012] Preferably, the top of the bearing seat is provided with sliding sub-plates corresponding to the two sliding frames respectively. Racks are fixedly connected to the opposite surfaces of the sliding sub-plates and the sliding frames. A gear is rotatably installed on the bearing seat between the two racks. The gear meshes with the racks on both sides simultaneously. A support card with a gradually changing cross-sectional thickness is fixedly connected to the bottom of the two sliding sub-plates. The support card passes through the included angle area between the left grinding wheel and the right grinding wheel.

[0013] Preferably, the outer wall of the support card is provided with guide slots corresponding to the two limiting rods. The guide slots are connected to the hinge blocks on the limiting rods by a connecting rod. A sliding roller is provided at one end of the connecting rod located in the guide slot. The sliding roller forms a rolling engagement with the guide slot. The connecting rod is hinged to the hinge block at one end located in the hinge block.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] In this invention, when the grinding wheel tilt adjustment component drives the left and right grinding wheels to swing outward and expand, the gear and rack mechanism simultaneously drives the support card to move upward. Since the cross-sectional thickness of the support card gradually increases along its length, the support card can always tightly fill the included angle space between the inner walls of the two grinding wheels. No matter how the included angle changes, it can form a stable support without gaps, avoiding the appearance of cavities or gaps in the included angle area, enhancing the lateral stiffness of the grinding wheel during the grinding process, suppressing the vibration and displacement caused by the grinding force, and ensuring the smoothness of the grinding process and the surface quality.

[0016] In this invention, a main-secondary composite annular groove structure consisting of a main groove, a secondary groove, and a transition slope is formed on the outer wall of the grinding wheel. In the initial state, the ball at the end of the limiting rod engages with the main groove with only a small pressure, providing basic limiting. When the grinding wheel expands outward to enter a heavy-duty grinding state, the support card expands outward through the engagement of the V-shaped expansion groove and the limiting ball, thereby allowing the ball to enter the secondary groove from the main groove via the transition slope. Since the bottom radius of the secondary groove is larger than that of the main groove, the ball is radially lifted, increasing the compression of the spring in the limiting rod, thereby applying greater positive pressure to the outer wall of the grinding wheel to achieve enhanced locking. The variable pressure mechanism can automatically adjust the locking force according to the working posture of the grinding wheel, ensuring flexible adjustment in non-working or light-load states, and avoiding adjustment difficulties or insufficient locking caused by a single fixed pressure.

[0017] In this invention, the spatial angle between the left and right grinding wheels can be dynamically adjusted according to the actual difference in helix angle between the helical tooth surfaces on both sides of the worm, so that each grinding wheel can fit the corresponding tooth surface, thus solving the problem of under-grinding caused by the inability of traditional fixed grinding wheels to adapt to the difference in helix angle on both sides. Attached Figure Description

[0018] Figure 1 This is a front view of the machining platform of the present invention performing worm gear grinding.

[0019] Figure 2 This is a front view of the fine grinding assembly and the grinding wheel tilt angle adjustment assembly of the present invention;

[0020] Figure 3 This is a three-dimensional structural diagram of the fine grinding component and the grinding wheel tilt angle adjustment component in this invention;

[0021] Figure 4 This is a schematic diagram showing the unfolded left drive half-shaft, right drive half-shaft, left grinding wheel, and right grinding wheel in this invention.

[0022] Figure 5 This is a partial three-dimensional structural diagram of the fine grinding component and the grinding wheel tilt angle adjustment component in this invention;

[0023] Figure 6 This is a schematic diagram showing the initial pressure applied to the grinding wheel by the grinding wheel tilt adjustment component in this invention;

[0024] Figure 7 This is a front view of the limiting rod assembly in this invention;

[0025] Figure 8 This is a schematic diagram showing the connection between the sliding frame and the sliding subplate in this invention;

[0026] Figure 9 A front view of the limiting rod assembly and support card in this invention. Figure 1 ;

[0027] Figure 10 A front view of the limiting rod assembly and support card in this invention. Figure 2 ;

[0028] Figure 11 This is a schematic diagram of the limiting rod assembly and the main and auxiliary composite annular groove structure in this invention;

[0029] Figure 12 This is a three-dimensional structural diagram of the geared motor in this invention;

[0030] Figure 13 This is a schematic diagram of the worm gear in the geared motor of the present invention.

[0031] In the diagram: 1. Machining platform; 11. Frame; 12. Adjusting slide; 2. Precision grinding assembly; 21. Left drive half-shaft; 22. Right drive half-shaft; 23. Left grinding wheel; 24. Right grinding wheel; 25. Bearing seat; 26. Sliding seat; 3. Grinding wheel tilt adjustment assembly; 31. Sliding frame; 32. Adjusting frame; 33. Spherical hinge connecting rod; 34. Driving component; 4. Limiting rod assembly; 41. Limiting rod; 42. Hinge block; 43. Ball; 44. Sliding secondary plate; 45. Rack; 46. Gear; 47. Support card; 48. V-shaped expansion groove; 49. Limiting ball; 410. Guide slot; 411. Connecting rod; 412. Sliding roller; 5. Main and secondary composite ring groove structure; 51. Main groove; 51R, first radius; 52. Secondary groove; 52R, second radius; 6. Gear motor; 61. Worm gear. Detailed Implementation

[0032] 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.

[0033] Example

[0034] Please see Figures 1 to 13 The present invention provides a technical solution: an automated precision grinding device for manufacturing worm gears for geared motors, including a precision grinding component 2. The precision grinding component 2 is integrated into the precision grinding platform 1 of the helical tooth surface of the worm 61 in the geared motor 6. Through a dynamically adjustable double grinding wheel tilting angle system, the device solves the problems of insufficient grinding adaptability, vibration and displacement during the grinding process caused by the difference in helical angle on both sides of the worm 61.

[0035] The processing platform 1 includes a frame 11 and an adjusting slide 12. The adjusting slide 12 is used to support and position the worm gear 61 to be processed. The frame 11 is located above the adjusting slide 12. Its fine grinding assembly 2 is installed on the frame 11 for fine grinding of the tooth surface of the worm gear 61. The fine grinding assembly 2 includes a left drive half shaft 21 and a right drive half shaft 22. The two are rotatably mounted on the frame 11 with their own axes as the rotation center lines. The ends of the two are respectively fixedly mounted with a left grinding wheel 23 and a right grinding wheel 24 for precision grinding of the helical tooth surfaces on both sides of the worm gear 61.

[0036] Specifically, the input end of the left drive half-shaft 21 is coupled to the power input shaft through the first cross shaft, and the horizontal journal of the first cross shaft forms the left swing axis. The end of the right drive half-shaft 22 is mounted on the frame 11 through the second cross shaft, and the horizontal journal of the second cross shaft forms the right swing axis. Both the left swing axis and the right swing axis extend in the horizontal direction and are perpendicular to the axes of the corresponding left drive half-shaft 21 and right drive half-shaft 22, respectively.

[0037] The frame 11 is also equipped with a grinding wheel tilt angle adjustment component 3, which is used to drive the left grinding wheel 23 and the right grinding wheel 24 to swing around their respective swing axes in the vertical plane, thereby adjusting the spatial angle between the axes of the two grinding wheels.

[0038] When the grinding wheel tilt adjustment component 3 applies driving force, the left drive half shaft 21 and the right drive half shaft 22 swing vertically around their respective horizontal swing axes, thereby precisely changing the relative angle between the left grinding wheel 23 and the right grinding wheel 24 to adapt to the grinding process requirements of different helix angles on both sides of the worm 61.

[0039] Furthermore, a bearing seat 25 is fixedly connected to the frame 11. A sliding seat 26 is provided on the bearing seat 25 along the vertical direction perpendicular to the axis of the double grinding wheel. The grinding wheel tilt angle adjustment assembly 3 is set into two sets and is symmetrically arranged with the sliding seat 26 as the central axis, respectively corresponding to the left drive half shaft 21 and the right drive half shaft 22.

[0040] Taking one set as an example, the grinding wheel tilt adjustment assembly 3 includes a sliding frame 31 fixedly connected to the sliding seat 26, and an adjustment frame 32 rotatably connected to the left drive half shaft 21 and the right drive half shaft 22 respectively. The sliding frame 31 and the adjustment frame 32 are connected to each other through a ball joint connecting rod 33 to achieve motion transmission. The bearing seat 25 is provided with a driving member 34 for driving the sliding seat 26 to slide vertically along the bearing seat 25. In this embodiment, the driving member 34 is preferably a servo electric cylinder or a precision lead screw mechanism.

[0041] When the driving component 34 drives the sliding seat 26 to move vertically, the sliding frame 31 located on the sliding seat 26 drives the spherical hinge connecting rod 33 to move synchronously. The spherical hinge connecting rod 33 then pulls the adjusting frame 32 connected to the left drive half shaft 21 and the right drive half shaft 22, thereby driving the left grinding wheel 23 and the right grinding wheel 24 to swing synchronously around their respective swing axes, so as to achieve precise adjustment of the relative angle between them.

[0042] In this embodiment, limit rod assemblies 4 are respectively provided on the outer wall surfaces of the bearing seat 25 corresponding to the left grinding wheel 23 and the right grinding wheel 24. The limit rod assemblies 4 continuously and elastically abut against the outer wall surfaces of the two grinding wheels. Both sets of limit rod assemblies 4 include limit rods 41 that are elastically telescopically arranged. A spring element is integrated inside the limit rod 41. The end of the limit rod 41 is hinged to a ball 43 through a hinge block 42. The ball 43 abuts against the outer wall surface of the corresponding two grinding wheels under the elastic force of the spring element, forming a basic limit constraint.

[0043] In this embodiment, the top of the bearing seat 25 is provided with sliding sub-plates 44 corresponding to the two sliding frames 31 respectively. Racks 45 are fixedly connected to the opposite surfaces of the sliding sub-plates 44 and the sliding frames 31. A gear 46 is rotatably installed on the bearing seat 25 between the two racks 45. The gear 46 meshes with the racks 45 on both sides at the same time. A support card 47 with a gradually changing cross-sectional thickness is fixedly connected to the bottom of the two sliding sub-plates 44. The support card 47 passes through the included angle area between the left grinding wheel 23 and the right grinding wheel 24.

[0044] The support card 47 with a gradually varying cross-sectional thickness is constructed to have a continuously varying cross-sectional thickness along its length direction, with the cross-sectional thickness gradually increasing from the bottom to the top of the card. A V-shaped expansion groove 48 is provided inside the support card 47, and a limiting ball 49 is fixedly installed on the bearing seat 25 facing the inside of the V-shaped expansion groove 48.

[0045] When the left grinding wheel 23 and the right grinding wheel 24 expand and swing outward, the grinding ends that are in contact with the tooth surface of the worm 61 are in an open state. In contrast to this open state, the end where the support card 47 is located is the angled contraction end. While the sliding frame 31 moves downward to adjust the left grinding wheel 23 and the right grinding wheel 24 to swing, the rack 45 on the sliding frame 31 drives the gear 46 to rotate. The gear 46 then drives the rack 45 on the sliding plate 44 to move the sliding plate 44 upward, thereby causing the support card 47 to be moved upward synchronously to adapt to the angled gap.

[0046] During the upward movement of the support card 47, as its cross-sectional thickness gradually increases along the length direction, the contact between the support card 47 and the inner wall of the grinding wheel on both sides remains tight. The gradually changing cross-sectional thickness structure ensures that the support card 47 is always filled in the included angle space, avoiding the appearance of cavities or gaps in the included angle area, thereby providing stable lateral support to the grinding wheel on both sides and suppressing vibration and displacement during the grinding process.

[0047] In this embodiment, guide grooves 410 are respectively provided on the outer wall of the support card 47 corresponding to the two limiting rods 41. The guide grooves 410 and the hinge blocks 42 on the limiting rods 41 are connected by a connecting rod 411. A sliding roller 412 is provided at one end of the connecting rod 411 located in the guide groove 410. The sliding roller 412 forms a rolling engagement with the guide groove 410. The connecting rod 411 is hinged to the hinge block 42 at one end, and is used to adjust the hinge block 42 to change the deflection angle of the ball 43 on it.

[0048] On the outer wall surfaces of the left grinding wheel 23 and the right grinding wheel 24, there are main and auxiliary composite annular groove structures 5 centered on the axis of the grinding wheel. The main and auxiliary composite annular groove structure 5 includes a main groove 51 and auxiliary grooves 52 arranged on both sides of the main groove 51. The main groove 51 is an annular groove with a bottom radius of a first radius 51R. The auxiliary groove 52 extends obliquely along the circumference of the grinding wheel with a bottom radius of a second radius 52R. The second radius 52R is greater than the first radius 51R, that is, the bottom height of the auxiliary groove 52 is higher than that of the main groove 51. The main groove 51 and the auxiliary groove 52 are smoothly connected by a transition slope.

[0049] In the initial state, that is, when the left grinding wheel 23 and the right grinding wheel 24 are on the same axis, the ball 43 is located in the main groove 51. At this time, the spring in the limiting rod 41 is in a small compression state, and the ball 43 provides a small basic limiting pressure on the outer wall of the double grinding wheel.

[0050] When the left grinding wheel 23 and the right grinding wheel 24 expand outward for grinding, the limiting ball 49 located in the V-shaped expansion groove 48 forms a physical block on the middle area of ​​the support card 47, forcing the V-shaped outer wall of the support card 47 to expand outward. When the outer wall of the support card 47 expands outward, the sliding roller 412 is driven by the guide groove 410 to push the connecting rod 411 to move outward. After the connecting rod 411 moves outward, it contacts the hinge block 42 and drives the hinge block 42 to deflect. The hinge block 42 drives the ball 43 from the main groove 51 through the transition slope into the secondary groove 52.

[0051] Because the bottom radius of the secondary groove 52 is larger than that of the main groove 51, the ball 43 is lifted radially outward after entering the secondary groove 52, and the spring inside the limiting rod 41 is further compressed, thereby increasing the normal pressure of the ball 43 on the outer wall of the double grinding wheel, and thus providing enhanced locking and limiting force to the grinding wheel. When the left grinding wheel 23 and the right grinding wheel 24 return to the initial state of being on the same axis, the support card 47 resets, and the ball 43 returns to the main groove 51 from the secondary groove 52 through the transition slope under the action of the spring force of the limiting rod 41 via the connecting rod 411, restoring the stable state of low pressure.

[0052] As a further preferred embodiment, the bottom radius of the secondary groove 52 changes continuously along the circumference of the grinding wheel, forming a gradually varying depth structure;

[0053] Specifically, the bottom radius of the secondary groove 52 at the end away from the main groove 51 is greater than the bottom radius of the groove at the connection between the secondary groove 52 and the main groove 51, forming a linear feature that gradually increases along the circumference. When the ball 43 moves in the secondary groove 52, the spring in the limiting rod 41 is gradually compressed, and the pressure of the ball 43 on the outer wall of the grinding wheel increases linearly, thus adapting to the different requirements of locking force under different grinding conditions.

[0054] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automated precision grinding device for manufacturing worm gears for geared motors, characterized in that, include: The processing platform (1) includes a frame (11) and an adjustment slide (12) for carrying the worm gear (61) to be processed. The fine grinding assembly (2) is mounted on the frame (11) and includes a left drive half shaft (21) and a right drive half shaft (22), which are mounted on the frame (11) with their own axes as the rotation center lines respectively. The left grinding wheel (23) and the right grinding wheel (24) are fixedly installed at the ends of the left drive half shaft (21) and the right drive half shaft (22), respectively; The grinding wheel tilt adjustment assembly (3) is mounted on the frame (11) and is used to drive the left grinding wheel (23) and the right grinding wheel (24) to swing around their respective swing axes in the vertical plane to adjust the spatial angle between the axes of the two grinding wheels. Two sets of limit rod assemblies (4) are respectively set on the frame (11) and correspond to the outer wall surfaces of the left grinding wheel (23) and the right grinding wheel (24). Each set of limit rod assemblies (4) elastically abuts against the outer wall surface of the corresponding grinding wheel to form a basic limit constraint. The support card (47) is inserted into the angled area between the left grinding wheel (23) and the right grinding wheel (24). The support card (47) moves synchronously with the change of the angle between the grinding wheels and always fills the angled space.

2. The automated precision grinding device for manufacturing worm gears for geared motors according to claim 1, characterized in that: A bearing seat (25) is fixedly connected to the frame (11), and a sliding seat (26) is provided on the bearing seat (25) along the vertical direction perpendicular to the axis of the double grinding wheel. The grinding wheel tilt adjustment assembly (3) is set into two groups and arranged symmetrically with the sliding seat (26) as the central axis, corresponding to the left drive half shaft (21) and the right drive half shaft (22) respectively. Each grinding wheel tilt adjustment assembly (3) includes a sliding frame (31) fixedly connected to the sliding seat (26); Adjusting brackets (32) are rotatably connected to the left drive half shaft (21) and the right drive half shaft (22), respectively. The sliding frame (31) and the adjusting frame (32) are connected by a ball joint connecting rod (33); A driving element (34) is provided on the support (25) for driving the sliding seat (26) to slide vertically along the support (25).

3. The automated precision grinding device for manufacturing worm gears for geared motors according to claim 2, characterized in that: The grinding wheel tilt adjustment assembly (3) also includes: Two sliding sub-plates (44) are respectively set on the top of the bearing seat (25) and correspond to the two sliding frames (31); The rack (45) is fixedly connected to the opposite surfaces of the sliding subplate (44) and the sliding frame (31); The gear (46) is rotatably mounted on the bearing seat (25) and located between the two racks (45), meshing with the racks (45) on both sides simultaneously; The support card (47) is fixedly connected to the bottom of the two sliding sub-plates (44) and has a gradually changing cross-sectional thickness; V-shaped expansion groove (48) is formed inside the support card (47); The limiting ball (49) is fixedly set on the bearing seat (25) and faces the inside of the V-shaped expansion groove (48).

4. The automated precision grinding device for manufacturing worm gears for geared motors according to claim 3, characterized in that: The thickness of the support card (47) is configured such that the thickness of the cross section changes continuously along its length direction, gradually increasing from the bottom to the top of the card.

5. The automated precision grinding device for manufacturing worm gears for geared motors according to claim 1, characterized in that: Each set of limit rod assemblies (4) includes a limit rod (41) that is elastically telescopically configured. The hinge block (42) is hinged to the end of the limiting rod (41), and a ball (43) is embedded in the hinge block (42). The ball (43) abuts against the outer wall of the corresponding grinding wheel under the action of the spring element inside the limiting rod (41).

6. The automated precision grinding device for manufacturing worm gears for geared motors according to claim 5, characterized in that: The limiting rod assembly (4) also includes: The guide slot (410) is formed on the outer wall of the support card (47) and corresponds to the limiting rod (41); The connecting rod (411) has one end rollingly engaged with the guide groove (410) via a sliding roller (412), and the other end hinged to the hinge block (42).

7. The automated precision grinding device for manufacturing worm gears for geared motors according to claim 6, characterized in that: The outer walls of the left grinding wheel (23) and the right grinding wheel (24) are respectively provided with a main and auxiliary composite ring groove structure (5) centered on the axis of the grinding wheel; The main and auxiliary composite annular groove structure (5) includes a main groove (51) and auxiliary grooves (52) disposed on both sides of the main groove (51); The main groove (51) is an annular groove, and its bottom radius is the first radius (51R); The secondary groove (52) extends obliquely along the circumference of the grinding wheel, and its bottom radius is the second radius (52R), and the second radius (52R) is greater than the first radius (51R). The main groove (51) and the secondary groove (52) are smoothly connected by a transition slope.

8. The automated precision grinding device for manufacturing worm gears for geared motors according to claim 7, characterized in that: The bottom radius of the secondary groove (52) changes continuously along the circumference of the grinding wheel, and the bottom radius of the end away from the main groove (51) is greater than the bottom radius of the connection between the secondary groove (52) and the main groove (51).

9. The automated precision grinding device for manufacturing worm gears for geared motors according to claim 1, characterized in that: The input end of the left drive half shaft (21) is coupled to the power input shaft through the first cross shaft, and the horizontal journal of the first cross shaft forms the left swing axis; The end of the right drive half shaft (22) is mounted on the frame (11) via the second cross shaft, and the horizontal journal of the second cross shaft forms the right swing axis; The left and right swing axes both extend horizontally and are perpendicular to the axes of the corresponding left drive half shaft (21) and right drive half shaft (22), respectively.

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