Synchronization gear transmission system anti-backlash gear key groove processing device and method

Abstract

The application discloses a kind of synchronous gear transmission system clearance gear key groove processing device and method in the field of gear processing, including bottom support, fixed seat and moving seat are respectively provided on bottom support, fixed seat and moving seat are respectively provided with shaft hole one and shaft hole two, positioning mandrel one and positioning mandrel two are respectively vertically inserted into shaft hole one and shaft hole two downwards, positioning mandrel one is fixedly connected with fixed seat by positioning assembly, bearing is arranged between the outer periphery of positioning mandrel two and the inner wall of shaft hole two, the outer periphery of positioning mandrel one and positioning mandrel two is respectively provided with support step one and support step two, the outer periphery of positioning mandrel one is fitted with left gear, left gear is supported on support step one, the outer periphery of positioning mandrel two is fitted with right gear, right gear is supported on support step two, and right gear is engaged with left gear.The application can eliminate the clearance of two synchronous gears, ensure that key groove makes synchronous gear rotate simultaneously.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of gear machining, and particularly relates to a synchronous gear transmission system gap-eliminating gear key groove machining device and method. BACKGROUND

[0002] In the prior art, the transmission system of a press machine drives the slide block to move up and down reciprocatingly through a connecting rod driven by the rotation of a crankshaft, so as to drive the upper die to stamp or stretch a workpiece; in order to improve the stability of the slide block lifting, the transmission system of a double-point press machine uses a double-point gear, which is two synchronous gears meshing with each other, and the double-point gear drives two crankshafts to rotate at the same time, and drives the slide block to move up and down reciprocatingly through two connecting rods.

[0003] At present, when machining the key grooves of two meshing gears, the following problems exist due to the gap between the two gears: the positions of the key grooves of the two gears machined cannot be guaranteed to be the same, the machining precision of the gear key grooves is not enough, the synchronous transmission of the two gears cannot be ensured, and finally the operation of the press machine is affected. SUMMARY

[0004] One of the purposes of the present application is to provide a synchronous gear transmission system gap-eliminating gear key groove machining device, which can eliminate the gap between two synchronous gears, ensure that the key grooves machined on the two gears are aligned with the center of the gear tips or gear grooves, improve the gear machining precision, and finally ensure that the synchronous gears of the transmission system of a double-point press machine rotate at the same time, so as to ensure that the two crankshafts of the double-point press machine rotate synchronously.

[0005] The purpose of the present application is achieved by a synchronous gear transmission system gap-eliminating gear key groove machining device, which comprises a base, the base is provided with a fixed seat and a movable seat, the fixed seat and the movable seat are respectively provided with shaft holes one and two, a positioning mandrel one and a positioning mandrel two are respectively vertically inserted into the shaft holes one and two, the positioning mandrel one is fixedly connected with the fixed seat through a positioning assembly, a bearing is arranged between the outer periphery of the positioning mandrel two and the inner wall of the shaft hole two, the outer peripheries of the positioning mandrel one and the positioning mandrel two are respectively provided with support steps one and two, a left gear is fitted and sleeved on the outer periphery of the positioning mandrel one, the left gear is supported on the support step one, the outer periphery of the positioning mandrel two is fitted and sleeved with a right gear, the right gear is supported on the support step two, and the right gear is meshed with the left gear; a transverse guide rail is arranged on the base corresponding to the movable seat, the movable seat is movably connected with the guide rail through a sliding block, and the extending end of the piston rod of an air cylinder is drivingly connected with the movable seat.

[0006] As a further improvement of the present application, the base is fixed on the workbench through a plurality of inner hexagonal screws. Six inner hexagonal screws fix the base on the workbench surface of the machining equipment.

[0007] In order to position the support steps one and two, the hole depth of the shaft hole one is less than the height of the fixed seat, the lower end of the shaft hole two is flush with the bottom surface of the moving seat, the fixed seat is provided with a positioning groove one above the shaft hole one, the moving seat is provided with a positioning groove two above the shaft hole two, the positioning groove one and the positioning groove two are respectively matched with the support steps one and two, and the lower ends of the support steps one and two are respectively embedded into the positioning groove one and the positioning groove two.

[0008] In order to fix the positioning mandrels one and two with the fixed seat, the positioning assembly comprises countersunk screws, the support step one is fixed with the fixed seat through four circumferentially distributed countersunk screws, and two vertically positioned pins spaced 180 degrees apart are inserted into the fixed seat through the support step one.

[0009] In order to facilitate the rotation of the right gear driven by the positioning mandrel two, the shaft hole two is a stepped hole, the shaft hole two comprises a large-diameter hole segment above and a small-diameter hole segment below, two vertically stacked bearings are arranged in the large-diameter hole segment, a coaxial large-diameter spacer and a small-diameter spacer are arranged between the two bearings, and the lower end of the positioning mandrel two is matched with the bearings.

[0010] In order to fix the left gear and the right gear after eliminating the tooth gap, and prevent the left gear and the right gear from being dislocated during the process of machining the key groove, the left gear and the right gear are pressed by the pressing assembly and the corresponding positioning mandrel, the pressing assembly comprises two vertical bolts threaded on the fixed seat or the moving seat, the two bolts are symmetrically distributed on the left and right sides of the corresponding positioning mandrel, the upper ends of the left gear and the right gear are both horizontally provided with two pressing plates, and the corresponding bolts pass through the pressing plates downward and press the pressing plates.

[0011] As a further improvement of the application, the upper surfaces of the fixed seat and the moving seat are flush, the upper surfaces of the fixed seat and the moving seat are equal in size, the shaft hole one and the shaft hole two are arranged in the middle of the fixed seat and the moving seat respectively, the right gear and the left gear are synchronous gears, two guide rails are arranged in parallel, the guide rails are fixed with the bottom support through the inner hexagonal screws, the displacement sensor is arranged on the guide rail corresponding to the slider, the cylinder is transversely installed on the cylinder bracket on the bottom support, and the cylinder piston rod is connected with the moving seat through the connecting block. The size and the number of teeth of the right gear and the left gear are the same, and the right gear and the left gear are both even teeth.

[0012] As a further improvement of the application, the positioning mandrel one comprises an installation segment one above the support step one and an insertion segment one below the support step one, and the positioning mandrel two comprises an installation segment two above the support step two and an insertion segment two below the support step two.

[0013] The second object of the present application is to provide a machining method of the machining device for eliminating the gear gap of the synchronous gear transmission system, which can quickly and efficiently machine the key groove of the synchronous gear, eliminate the gear gap of the synchronous gear transmission system, ensure the synchronization of the machined key groove of the synchronous gear, and enable the synchronous gear to rotate synchronously.

[0014] The object of the present application is achieved by a machining method of the machining device for eliminating the gear gap of the synchronous gear transmission system, comprising the following steps:

[0015] (1) vertically insert the insertion section one of the positioning mandrel one into the shaft hole one of the fixed seat, so that the support step one is supported on the fixed seat, and the support step one is fixed with the fixed seat by four evenly distributed counterborescrews, and two vertical positioning pins spaced 180 degrees apart are inserted into the fixed seat through the support step one;

[0016] (2) the left gear is sleeved on the mounting section one of the positioning mandrel one, so that the lower end of the left gear is supported on the support step one, and two symmetrically distributed horizontal pressing plates are positioned and installed on the left gear, and the bolts are fixedly connected with the fixed seat downward through the pressing plates and press the pressing plates;

[0017] (3) vertically insert the insertion section two of the positioning mandrel two into the shaft hole two of the moving seat, so that the support step two is supported on the moving seat, and then the right gear is sleeved on the mounting section two of the positioning mandrel two, and the lower end of the right gear is supported on the support step two;

[0018] (4) the moving seat is driven by the cylinder to slide along the guide rail, so that the right gear slides towards the left gear to adjust the center distance of the two gears, and the moving seat and the right gear are positioned by the cylinder;

[0019] (5) rotate the right gear, so that the gear teeth of the right gear are engaged with the gear groove of the left gear to eliminate the gear gap, and two symmetrically distributed horizontal pressing plates are positioned and installed on the right gear, and the bolts are fixedly connected with the moving seat downward through the pressing plates and press the pressing plates; the gear teeth of the right gear are in close contact with one side of the gear groove of the left gear to eliminate the gear gap;

[0020] (6) machining the key groove.

[0021] As a further improvement of the present application, the number of teeth of the right gear and the left gear is even, in the step (2), the center of the right side gear teeth of the left gear is at 0° position relative to the axis of the shaft hole, in the step (6), the center line of the left gear and the right gear is obtained as a positioning line, the positioning line is transversely arranged, a key groove one is processed on the outer periphery of the center hole of the left gear, and the key groove one is opposite to the right side gear teeth of the left gear; a key groove two is processed on the outer periphery of the center hole of the right gear, and the key groove two is opposite to the right side gear teeth of the right gear at 0° position. The positions of the key groove one and the key groove two correspond to each other, the gear gap of the synchronous gear is eliminated, the synchronous rotation of the synchronous gear is ensured, and the two crankshafts of the double-point press can realize synchronous rotation.

[0022] When the present application is used, the positioning mandrel one is fastened on the fixed seat by four M 16 internal hexagon countersunk head screws, the fixed seat and the positioning mandrel one are fixed by two positioning pins, the positioning pins are staggered with the countersunk head screws, the left gear is clamped on the positioning mandrel one and is pressed by the pressing plate; the positioning mandrel two is assembled on the moving seat, and the right gear is clamped on the positioning mandrel two; the moving seat is driven by the cylinder to slide along the guide rail, so that the right gear slides towards the left gear to adjust the center distance of the two gears, so that the center distance of the two gears reaches the requirement, and the moving seat and the right gear are positioned by the cylinder; then the gear gap is eliminated by rotating the right gear, the right gear is pressed by the pressing plate, and finally the key grooves of the two gears are processed. Compared with the prior art, the present application has the beneficial effects that the gap of the two synchronous gears can be eliminated, the right side gear teeth of the right gear are in close contact with the left side gear teeth of the left gear, the two gears are prevented from being out of synchronization, the gear gap is eliminated, the key grooves processed on the two gears are aligned with the center of the gear teeth or the gear groove, the gear machining precision is improved, and finally the synchronous gears of the transmission system of the double-point press can rotate at the same time, so that the two crankshafts of the double-point press can rotate synchronously. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a structural schematic view of the present application.

[0024] Figure 2 It is an A view of Figure 1 .

[0025] Figure 3 It is an enlarged view of B in Figure 1 .

[0026] Figure 4 It is a top view of Figure 1 .

[0027] Wherein, 1 bottom support, 2 fixed seat, 3 moving seat, 4 shaft hole one, 5 shaft hole two, 5a large diameter hole section, 5b small diameter hole section, 6 positioning mandrel one, 6a support step one, 601 installation section one, 602 insertion section one, 7 positioning mandrel two, 7a support step two, 701 installation section two, 702 insertion section two, 8 bearing, 9 left gear, 10 right gear, 11 guide rail, 12 sliding block, 13 air cylinder, 14 internal hexagonal screw, 15 positioning groove one, 16 positioning groove two, 17 countersunk screw, 18 positioning pin, 19 connecting block, 20 large diameter spacer sleeve, 21 small diameter spacer sleeve, 22 bolt, 23 pressing plate, 24 internal hexagonal screw, 25 displacement sensor, 26 air cylinder bracket. Embodiment

[0028] As Figures 1-4 shown, it is a kind of synchronous gear transmission system gap elimination gear key groove processing device, including bottom support 1, bottom support 1 is equipped with fixed seat 2 and moving seat 3 respectively, fixed seat 2 and moving seat 3 are equipped with shaft hole one 4 and shaft hole two 5 respectively, positioning mandrel one 6 and positioning mandrel two 7 are vertically inserted into shaft hole one 4 and shaft hole two 5 respectively, positioning mandrel one 6 is fixedly connected with fixed seat 2 by positioning assembly, bearing 8 is arranged between the outer periphery of positioning mandrel two 7 and the inner wall of shaft hole two 5, the outer periphery of positioning mandrel one 6 and positioning mandrel two 7 is provided with support step one 6a and support step two 7a respectively, left gear 9 is fitted on the outer periphery of positioning mandrel one 6, left gear 9 is supported on support step one 6a, right gear 10 is fitted on the outer periphery of positioning mandrel two 7, right gear 10 is supported on support step two 7a, and right gear 10 is engaged with left gear 9;Fixed seat 3 is provided with horizontal guide rail 11 on bottom support 1, moving seat 3 is movably connected with guide rail 11 through sliding block 12, and the piston rod extension end of air cylinder 13 is drivingly connected with moving seat 3.

[0029] Bottom support 1 is fixed on the workbench by several internal hexagonal screws 14.Six internal hexagonal screws 14 fix bottom support 1 on the workbench surface of processing equipment.In order to position support step one 6a and support step two 7a, the hole depth of shaft hole one 4 is less than the height of fixed seat 2, the lower end of shaft hole two 5 is flush with the bottom surface of moving seat 3, positioning groove one 15 is formed on fixed seat 2 above shaft hole one 4, and positioning groove two 16 is formed on moving seat 3 above shaft hole two 5, positioning groove one 15 and positioning groove two 16 are matched with support step one 6a and support step two 7a respectively, and the lower end of support step one 6a and support step two 7a is respectively embedded in positioning groove one 15 and positioning groove two 16.

[0030] In order to fix the positioning mandrel one 6 and the fixed seat 2, the positioning assembly includes the countersunk screw 17, the support step one 6a is fixed with the fixed seat 2 through four circumferentially distributed countersunk screws 17, and two vertically positioned pins 18 spaced 180 degrees apart are inserted into the fixed seat 2 through the support step one 6a. In order to facilitate the positioning mandrel two 7 to drive the right gear 10 to rotate, the shaft hole two 5 is a stepped hole, the shaft hole two 5 includes an upper large-diameter hole segment 5a and a lower small-diameter hole segment 5b, two vertically stacked bearings 8 are arranged in the large-diameter hole segment 5a, a coaxial large-diameter spacer sleeve 20 and a small-diameter spacer sleeve 21 are arranged between the two bearings 8, and the lower end of the positioning mandrel two 7 is matched with the bearing 8.

[0031] In order to fix the left gear 9 and the right gear 10 after eliminating the tooth gap, and prevent the left gear 9 and the right gear 10 from being dislocated in the process of machining the key groove, the left gear 9 and the right gear 10 are pressed by the pressing assembly and the corresponding positioning mandrel, the pressing assembly includes two vertical bolts 22 screwed on the fixed seat 2 or the moving seat 3, the two bolts 22 are symmetrically distributed on the left and right sides of the corresponding positioning mandrel, and the upper end of the left gear 9 and the right gear 10 is horizontally provided with two pressing plates 23, and the corresponding bolts 22 pass through the pressing plates 23 downward and press the pressing plates 23.

[0032] The upper surfaces of the fixed seat 2 and the moving seat 3 are flush, the upper surfaces of the fixed seat 2 and the moving seat 3 are the same, the shaft hole one 4 and the shaft hole two 5 are respectively arranged in the middle of the fixed seat 2 and the moving seat 3, the right gear 10 and the left gear 9 are synchronous gears, two guide rails 11 are arranged in parallel, the guide rails 11 are fixed to the bottom support 1 through the inner hexagonal screw 24, the displacement sensor 25 is arranged on the guide rail 11 corresponding to the sliding block 12, the air cylinder 13 is transversely installed on the air cylinder support 26 on the bottom support 1, and the piston rod of the air cylinder 13 is connected with the moving seat 3 through the connecting block 19. The size and the number of teeth of the right gear 10 and the left gear 9 are the same, and the right gear 10 and the left gear 9 are both even teeth.

[0033] The positioning mandrel one 6 includes the mounting segment one 601 above the support step one 6a and the insertion segment one 602 below the support step one 6a, and the positioning mandrel two 7 includes the mounting segment two 701 above the support step two 7a and the insertion segment two 702 below the support step two 7a.

[0034] A machining method of a synchronous gear transmission system gap-eliminating gear key groove machining device, comprising the following steps:

[0035] (1) The insertion segment one 602 of the positioning mandrel one 6 is vertically matched and inserted into the shaft hole one 4 of the fixed seat 2, so that the support step one 6a is supported on the fixed seat 2, the support step one 6a is fixed with the fixed seat 2 through four circumferentially distributed countersunk screws 17, and two vertically positioned pins 18 spaced 180 degrees apart are inserted into the fixed seat 2 through the support step one 6a;

[0036] (2) The left gear 9 is sleeved on the mounting section one 601 of the positioning mandrel one 6, so that the lower end of the left gear 9 is supported on the support step one 6a, two symmetrically distributed horizontal pressing plates 23 are positioned on the left gear 9, and the bolts 22 are fixedly connected with the fixed seat 2 downward through the pressing plates 23 and press the pressing plates 23; the number of teeth of the right gear 10 and the left gear 9 is even, and the center of the right side teeth of the left gear 9 is at a 0° position relative to the axis of the shaft hole one 4;

[0037] (3) The insertion section two 702 of the positioning mandrel two 7 is vertically matched and inserted into the shaft hole two 5 of the moving seat 3, so that the support step two 7a is supported on the moving seat 3, and then the right gear 10 is sleeved on the mounting section two 701 of the positioning mandrel two 7, and the lower end of the right gear 10 is supported on the support step two 7a;

[0038] (4) The cylinder 13 drives the moving seat 3 to slide along the guide rail 11, so that the right gear 10 slides towards the left gear 9 to adjust the center distance of the two gears, and the cylinder 13 positions the moving seat 3 and the right gear 10;

[0039] (5) The right gear 10 is rotated, so that the teeth of the right gear 10 are engaged with the tooth grooves of the left gear 9 to eliminate the gap between the gears, two symmetrically distributed horizontal pressing plates 23 are positioned on the right gear 10, and the bolts 22 are fixedly connected with the moving seat 3 downward through the pressing plates 23 and press the pressing plates 23; one side of the teeth of the right gear 10 is in close contact with one side of the tooth grooves of the left gear 9, so as to eliminate the gap between the tooth grooves;

[0040] (6) The key grooves are processed, the center line of the left gear 9 and the right gear 10 obtains a positioning line, the positioning line is transversely arranged, a key groove one is processed on the outer periphery of the center hole of the left gear 9, and the key groove one is opposite to the right side teeth of the left gear 9; a key groove two is processed on the outer periphery of the center hole of the right gear 10, and the key groove two is opposite to the right side tooth groove of the right gear 10 at a 0° position. The positions of the key groove one and the key groove two correspond to each other, the gap between the tooth grooves of the synchronous gear is eliminated, the synchronous rotation of the synchronous gear is ensured, and the two crankshafts of the double-point press machine can realize synchronous rotation.

[0041] The positioning mandrel one 6 is fastened on the fixed seat 2 by four M 16 inner hexagon countersunk screws 17, and the fixed seat 2 and the positioning mandrel one 6 are fixed by two positioning pins 18, the positioning pins 18 are staggered with the countersunk screws 17, the left gear 9 is clamped on the positioning mandrel one 6 and is pressed by the pressing plate 23; then the positioning mandrel two 7 is assembled on the moving seat 3, the right gear 10 is clamped on the positioning mandrel two 7; the moving seat 3 is driven to slide along the guide rail 11 by the air cylinder 13, so that the right gear 10 slides to the left gear 9 to adjust the center distance of the two gears, so that the center distance of the two gears reaches the requirement, the air cylinder positions the moving seat 3 and the right gear 10; then the right gear 10 is pressed by the pressing plate 23 after the clearance between the gears is eliminated by rotating the right gear 10, finally the key grooves of the two gears are machined. The invention can eliminate the clearance of the two synchronous gears, the teeth of the right gear 10 on one side are combined with the tooth groove of the left gear 9 on one side, the two gears are avoided from being out of synchronization, the tooth groove clearance is eliminated, the key grooves machined on the two gears are ensured to be aligned with the center of the tooth tip or the tooth groove, the gear machining precision is improved, finally the synchronous gears of the transmission system of the double-point press machine are ensured to rotate at the same time, the two crankshafts of the double-point press machine are ensured to rotate synchronously.

[0042] The present application is not limited to the above-mentioned embodiments, and based on the technical solutions disclosed in the present application, those skilled in the art can make some substitutions and modifications to some technical features without creative labor, and these substitutions and modifications are all within the protection scope of the present application.

Claims

1. A device for machining an anti-backlash gear keyway of a synchronous gear transmission system, characterized by, The application relates to a bottom support, which comprises a fixed seat and a moving seat, and is characterized in that an axle hole one and an axle hole two are respectively arranged on the fixed seat and the moving seat, a positioning mandrel one and a positioning mandrel two are respectively vertically inserted into the axle hole one and the axle hole two, the positioning mandrel one is fixedly connected with the fixed seat through a positioning assembly, a bearing is arranged between the outer periphery of the positioning mandrel two and the inner wall of the axle hole two, the outer peripheries of the positioning mandrel one and the positioning mandrel two are respectively provided with a support step one and a support step two, a left gear is matched and sleeved on the outer periphery of the positioning mandrel one, the left gear is supported on the support step one, a right gear is matched and sleeved on the outer periphery of the positioning mandrel two, the right gear is supported on the support step two, and the right gear is engaged with the left gear; a horizontal guide rail is arranged on the bottom support and corresponds to the moving seat, the moving seat is movably connected with the guide rail through a sliding block, and the piston rod of a cylinder is drivingly connected with the moving seat.

2. The device for machining the anti-backlash gear key groove of a synchronous gear transmission system according to claim 1, characterized in that, The bottom support is fixed on the workbench through a plurality of inner hexagonal screws.

3. The apparatus for machining the anti-backlash gear key groove of a synchronous gear transmission system according to claim 2, characterized in that, The hole depth of the axle hole one is smaller than the height of the fixed seat, the lower end of the axle hole two is flush with the bottom surface of the moving seat, a positioning groove one is arranged on the fixed seat and above the axle hole one, a positioning groove two is arranged on the moving seat and above the axle hole two, the positioning groove one and the positioning groove two are respectively arranged in matched mode with the support step one and the support step two, and the lower ends of the support step one and the support step two are respectively embedded into the positioning groove one and the positioning groove two.

4. The device for machining the anti-backlash gear key groove of a synchronous gear transmission system according to claim 3, characterized in that, The positioning assembly comprises a countersunk screw, the support step one is fixed with the fixed seat through four circumferentially-distributed countersunk screws, and two vertically-arranged positioning pins with a 180-degree circumferential interval are inserted into the fixed seat through the support step one.

5. The apparatus for machining the anti-backlash gear key groove of a synchronous gear transmission system according to claim 4, characterized in that, The axle hole two is a stepped hole, the axle hole two comprises a large-diameter hole segment on the upper side and a small-diameter hole segment on the lower side, two vertically-stacked bearings are arranged in the large-diameter hole segment, a coaxial large-diameter spacer and a small-diameter spacer are arranged between the two bearings, and the lower end of the positioning mandrel two is matched with the bearings.

6. The apparatus according to claim 5, wherein The left gear and the right gear are compressed with the corresponding positioning mandrels through a compression assembly, the compression assembly comprises two vertically-arranged threaded bolts fixed on the fixed seat or the moving seat, the two threaded bolts are symmetrically arranged on the left and right sides of the corresponding positioning mandrel, the upper ends of the left gear and the right gear are both horizontally provided with two pressing plates, and the corresponding threaded bolts pass through the pressing plates and compress the pressing plates downwards.

7. The apparatus of claim 6, wherein, The upper surfaces of the fixed seat and the moving seat are flush, the upper surfaces of the fixed seat and the moving seat are of the same size, the axle hole one and the axle hole two are respectively arranged in the middle of the fixed seat and the moving seat, the right gear and the left gear are synchronous gears, two guide rails are arranged in parallel, the guide rails are fixed with the bottom support through inner hexagonal screws, a displacement sensor is arranged on the guide rail and corresponds to the sliding block, the cylinder is horizontally arranged on a cylinder support on the bottom support, and the piston rod of the cylinder is connected with the moving seat through a connecting block.

8. The apparatus of claim 7, wherein, The positioning mandrel one comprises an installation segment one above the support step one and an insertion segment one below the support step one, and the positioning mandrel two comprises an installation segment two above the support step two and an insertion segment two below the support step two.

9. The method of claim 8, wherein the method further comprises: determining a center of the gear key groove; and determining a center of the gear key groove. The application further relates to a positioning method of the bottom support. (1) the insertion section one of the positioning mandrel one is vertically matched and inserted into the shaft hole one of the fixed seat, so that the support step one is supported on the fixed seat, the support step one and the fixed seat are fixed by four evenly distributed countersunk head screws, and two vertical positioning pins spaced 180 degrees are inserted into the fixed seat through the support step one; (2) the left gear is sleeved on the mounting section one of the positioning mandrel one, so that the lower end of the left gear is supported on the support step one, two symmetrically distributed horizontal pressing plates are positioned and mounted on the left gear, and the pressing plates are fixedly connected with the fixed seat by downwardly penetrating bolts and are pressed tightly; (3) the insertion section two of the positioning mandrel two is vertically matched and inserted into the shaft hole two of the moving seat, so that the support step two is supported on the moving seat, and then the right gear is sleeved on the mounting section two of the positioning mandrel two, and the lower end of the right gear is supported on the support step two; (4) the moving seat is driven to slide along the guide rail by the air cylinder, so that the right gear slides towards the left gear to adjust the center distance of the two gears, and the moving seat and the right gear are positioned by the air cylinder; (5) the right gear is rotated, so that the gear teeth of the right gear are engaged with the tooth grooves of the left gear to eliminate the gap between the gears, two symmetrically distributed horizontal pressing plates are positioned and mounted on the right gear, and the pressing plates are fixedly connected with the moving seat by downwardly penetrating bolts and are pressed tightly; (6) the key groove is processed.

10. The method of claim 9, wherein the method further comprises: The number of teeth of the right gear and the left gear is even, in the step (2), the center of the right gear teeth of the left gear is at the 0° position relative to the axis of the shaft hole one, in the step (6), the center line of the left gear and the right gear is obtained as a positioning line, the positioning line is transversely arranged, the key groove one is processed on the outer periphery of the center hole of the left gear, and the key groove one is opposite to the right gear teeth of the left gear; the key groove two is processed on the outer periphery of the center hole of the right gear, and the key groove two is opposite to the right gear teeth at the 0° position of the right gear.

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