Clamping mechanism and method for driving shaft gear to rotate for machining

Abstract

The invention provides a clamping mechanism and method for driving a shaft gear to rotate for machining. A clamping ring is mounted on a top positioning sleeve of a clamp seat in a clearance fit manner; one side of the clamping ring is fixedly provided with a single-acting oil cylinder in the radial direction, the single-acting oil cylinder penetrates through a U-shaped groove formed in the top positioning sleeve, the other side of the clamping ring is fixedly provided with guide plates in the radial direction, and the guide plates penetrate through guide grooves formed in the top positioning sleeve; spring jacking mechanisms are mounted in pairs in the radial direction of the clamping ring and located on the two sides of the guide plate, and the spring jacking mechanisms are matched with the outer circle of the top positioning sleeve; a positioning disc for axially limiting the clamping ring is fixedly mounted at the top of the clamp seat; the upper tip and the lower tip are used for tightly jacking the two axial ends of the shaft gear. The radial clamping position can be adjusted according to the actual condition of the shaft gear clamping outer circle, the coaxial requirement for the clamped shaft gear outer circle relative to center holes in the two ends does not exist, and over-positioning cannot be generated in shaft gear clamping.

Description

Technical Field

[0001] The present invention relates to the technical field of shaft gear processing, and in particular to a clamping mechanism and method for driving shaft gear processing and rotation. Background Art

[0002] The traditional gear processing machine tools adopt spring collets and other methods to clamp the shaft gear to drive its rotation during shaft gear processing, and some adopt three-jaw chucks to manually clamp the shaft gear to drive its rotation. Its biggest disadvantage is that when using spring collets and other methods to clamp the shaft gear to drive its rotation, the shaft gear design and processing usually adopts the center holes at both ends for positioning, while the spring collet clamps the outer circle of the shaft gear, which requires that the outer circle of the shaft gear clamped by the spring collet has a very high coaxial requirement with respect to the center holes at both ends. Otherwise, the spring collet clamping is prone to over-positioning, which has a great influence on the clamping and processing accuracy of the shaft gear. The three-jaw chuck is used to manually clamp the shaft gear to drive its rotation. In addition to the above-mentioned requirement that the clamping outer circle of the shaft gear has a very high coaxial requirement with respect to the center holes at both ends, manual clamping cannot guarantee the clamping accuracy of the shaft gear. Manual alignment is required for each clamping, which is very troublesome. Summary of the Invention

[0003] The purpose of the present invention is to overcome the above-mentioned shortcomings and provide a clamping mechanism and method for driving the shaft gear to rotate during processing. During the processing of the shaft gear, this clamping mechanism only needs to place the shaft gear into the upper and lower centers for positioning. The clamping mechanism that drives the shaft gear to rotate during processing can move radially and can adjust its radial clamping position according to the actual situation of the clamping outer circle of the shaft gear. There is no coaxial requirement for the clamped outer circle of the shaft gear relative to the center holes at both ends, and the shaft gear will not be over-positioned, which will affect the clamping and processing accuracy of the shaft gear. The whole process is simple to operate and easy to use, the shaft gear positioning accuracy is high, and the clamping time is saved. The structure is simple to process and assemble, and is stable and reliable.

[0004] In order to realize the above-mentioned technical features, the object of the present invention is achieved as follows: a clamping mechanism for driving the shaft gear processing rotation, comprising a clamp seat, a clamping ring is installed on the top positioning sleeve of the clamp seat through a clearance fit; a single-acting oil cylinder is fixedly installed in the radial direction of one side of the clamping ring, the single-acting oil cylinder passes through a U-shaped groove provided on the top positioning sleeve, and a guide plate is fixedly installed in the radial direction of the other side of the clamping ring, and the guide plate passes through the guide groove provided on the top positioning sleeve; spring tightening mechanisms are installed in pairs in the radial direction of the clamping ring and on both sides of the guide plate, and the spring tightening mechanisms cooperate with the outer circle of the top positioning sleeve; a positioning disk for axially limiting the clamping ring is fixedly installed on the top of the clamp seat; It also includes an upper center and a lower center for tightening the axial ends of the shaft gear.

[0005] Preferably, the fixture seat includes a fixture base plate, the outer circle of the fixture base plate is evenly processed with multiple notches, a center column is provided at the top center of the fixture base plate, a top positioning sleeve is provided at the top center of the center column, the top positioning sleeve is processed with radially arranged U-shaped grooves, the top positioning sleeve is processed with guide grooves on the opposite side of the U-shaped groove, and the top surface of the top positioning sleeve is processed with a top threaded hole; the top center of the top positioning sleeve is processed with a top cavity for accommodating the shaft gear.

[0006] Preferably, there is at least a 0.5 mm gap between the inner hole of the clamping ring and the outer circumference of the top positioning sleeve.

[0007] Preferably, the positioning plate includes a conical base plate, the top of the conical base plate is processed with a support boss for positioning the shaft gear, the conical base plate is processed with a first stepped hole for passing a first screw, the first screw is used to fix the positioning plate to the top of the top positioning sleeve, and the bottom center of the conical base plate is processed with an inner stepped hole for matching with the top positioning sleeve; after being fixed, the positioning plate forms a certain gap with the top of the clamping ring.

[0008] Preferably, the clamping ring includes a clamping ring body, a cylinder threaded hole is radially machined through one side of the clamping ring body, the single-acting cylinder is mounted inside the cylinder threaded hole by threaded fit, a guide plate mounting groove is radially machined on the opposite side of the cylinder threaded hole, a plurality of first screw blind holes are machined at the bottom end of the guide plate mounting groove, the first screw blind holes cooperate with the second screws to fix the guide plate inside the guide plate mounting groove; First threaded holes are symmetrically processed on both sides of the guide plate installation groove, steel ball holes are processed at the ends of the first threaded holes, and tapered tail holes are provided at the ends of the steel ball holes.

[0009] Preferably, a nut for limiting the position of the single-acting oil cylinder is installed at the tail end of the threaded hole of the oil cylinder, and a threaded hole for introducing hydraulic oil is processed at the center of the nut; The single-acting oil cylinder is internally provided with a spring to keep the piston rod of the oil cylinder in a retracted state, and the spring is further compressed under the action of external oil pressure to make the piston rod extend outward.

[0010] Preferably, the spring tightening mechanism includes a spring installed inside the first threaded hole and the steel ball hole, the tail of the spring is limited by a set screw installed inside the first threaded hole, and the other end of the spring presses the steel ball arranged inside the steel ball hole, and the outer diameter of the steel ball is larger than the outer diameter of the tapered tail hole.

[0011] Preferably, the steel ball is pre-tightened by a compression spring, and the outer circle of the steel ball is exposed from the inner hole of the clamping ring by at least 1.5 mm.

[0012] Preferably, the guide plate is processed with multiple second stepped holes for passing the second screws, vertical grooves are processed on both sides of the guide plate, and one end of the head of the guide plate is processed with a top end for matching with the outer circle of the shaft gear.

[0013] Another aspect of the present invention provides a method for driving a shaft gear to rotate, comprising the following steps: Step 1, assembly of the clamping ring upper parts: Install the spring tightening mechanism inside the first threaded hole of the clamping ring and the steel ball hole, and pre-tighten the steel ball with the set screw; Install the guide plate inside the guide plate installation groove of the clamping ring; Install the single-acting cylinder inside the cylinder threaded hole of the clamping ring; Step 2, installation of the clamping ring: The assembled clamping ring is installed on the fixture base as a whole, and the entire clamping ring is moved radially on the fixture base through the guide plate. The single-acting cylinder is also placed in the U-shaped groove of the fixture base and has no contact or interference with the fixture base. Step 3, installation of positioning plate: Connecting the positioning plate to the clamp seat via a first screw, thereby limiting the axial movement of the clamping ring; Step 4, radial clamping adjustment of the shaft gear: Place the shaft gear on the lower center, press down through the upper center until the end face fits against the end face of the positioning plate, and introduce hydraulic oil through the screw hole on the nut. The hydraulic oil pushes the piston rod of the single-acting cylinder to extend. When the piston rod of the single-acting cylinder contacts the shaft gear, it drives the clamping ring to move radially until the guide plate and the piston rod of the single-acting cylinder contact the shaft gear at the same time. The shaft gear is radially locked by the pressure of the hydraulic oil, and the steel ball is compressed and retracted at the same time. Step 5, Rotation Processing of Shaft Gear: The fixture seat rotates, and the cooperation between the guide groove on the fixture seat and the guide plate drives the entire clamping ring and the shaft gear to rotate, and the shaft gear is processed synchronously; Step 6, Unloading of the Shaft Gear: After the shaft gear processing is completed, the upper center moves up, the hydraulic oil stops supplying, the piston rod of the single-acting cylinder retracts, and the steel ball drives the clamping ring to move radially under the action of the spring, so that the piston rod and guide plate of the single-acting cylinder leave the clamping outer circle of the shaft gear at the same time, and then the shaft gear is taken out.

[0014] The present invention has the following beneficial effects: 1. The mechanism of the present invention only needs to place the shaft gear into the upper and lower centers for positioning. The clamping mechanism that drives the shaft gear to rotate can move radially. It can adjust its radial clamping position according to the actual situation of the shaft gear clamping outer circle. There is no coaxial requirement for the clamped shaft gear outer circle relative to the center holes at both ends. It will not cause over-positioning of the shaft gear clamping and affect the clamping and processing accuracy of the shaft gear. The whole process is simple to operate and easy to use. The shaft gear positioning accuracy is high, the clamping is convenient, the operation requirements are reduced, the processing and clamping time are saved, and the structure is stable and reliable.

[0015] 2. The above-mentioned clamp seat can be used to carry and assemble the entire clamping mechanism.

[0016] 3. Through the above-mentioned clearance fit, it is ensured that the clamping ring can be radially adjusted on the top positioning sleeve, so as to facilitate the subsequent radial adaptive adjustment clamping of the shaft gear and prevent over-positioning of the shaft gear.

[0017] 4. The positioning disc can be used to provide axial support for the shaft gear and axially limit the clamping ring, thereby ensuring that the clamping ring can be radially adjusted and moved on the top positioning sleeve.

[0018] 5. The above-mentioned clamping ring can ensure that after the axial clamping and positioning of the shaft gear is completed, the shaft gear is clamped in the circumferential direction. In the clamping process, the radial position of the clamping ring is adjusted with the help of a single-acting cylinder to adapt well to the radial position of the shaft gear and realize radial clamping.

[0019] 6. The above-mentioned single-acting cylinder can be used to provide radial clamping and fixing of the shaft gear.

[0020] 7. The spring-loaded mechanism facilitates positioning of the clamping ring and the fixture seat, and facilitates subsequent unloading of the clamping ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below with reference to the accompanying drawings and examples.

[0022] Figure 1 It is the front view of the present invention.

[0023] Figure 2 For the present invention Figure 1 Medium AA view.

[0024] Figure 3 This is a main sectional view of the clamping ring of the present invention.

[0025] Figure 4 It is a side sectional view of the clamping ring of the present invention.

[0026] Figure 5 This is a three-dimensional image of the positioning disk of the present invention from the first perspective.

[0027] Figure 6 This is a three-dimensional image of the positioning plate of the present invention from a second perspective.

[0028] Figure 7 This is a three-dimensional diagram of the clamp seat of the present invention from the first perspective.

[0029] Figure 8 This is a three-dimensional diagram of the clamp seat of the present invention from the second perspective.

[0030] Figure 9 It is a three-dimensional diagram of the guide plate of the present invention.

[0031] In the figure: upper center 1, shaft gear 2, first screw 3, positioning plate 4, clamping ring 5, fixture base 6, lower center 7, nut 8, single-acting cylinder 9, spring 10, set screw 11, steel ball 12, second screw 13, guide plate 14; Conical bottom plate 401, first stepped hole 402, supporting boss 403; Guide plate mounting groove 501, clamping ring 502, cylinder threaded hole 503, first threaded hole 504, steel ball hole 505, tapered tail hole 506; The fixture base plate 601, the notch 602, the center column 603, the top positioning sleeve 604, the top threaded hole 605, the U-shaped groove 606, the guide groove 607, and the top cavity 608; Top end 1401, second stepped hole 1402, vertical groove 1403. DETAILED DESCRIPTION

[0032] The embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0033] Example 1: See also Figure 1-9, a clamping mechanism for driving the shaft gear processing rotation, including a clamp seat 6, a clamping ring 5 is installed on the top positioning sleeve 604 of the clamp seat 6 through a clearance fit; a single-acting oil cylinder 9 is fixedly installed in the radial direction of one side of the clamping ring 5, and the single-acting oil cylinder 9 passes through a U-shaped groove 606 provided on the top positioning sleeve 604, and a guide plate 14 is fixedly installed in the radial direction of the other side of the clamping ring 5, and the guide plate 14 passes through a guide groove 607 provided on the top positioning sleeve 604; spring tightening mechanisms are installed in pairs in the radial direction of the clamping ring 5 and on both sides of the guide plate 14, and the spring tightening mechanism cooperates with the outer circle of the top positioning sleeve 604; a positioning plate 4 for axially limiting the clamping ring 5 is fixedly installed on the top of the clamp seat 6; it also includes an upper center 1 and a lower center 7 for tightening the axial ends of the shaft gear 2. By adopting the above-mentioned clamping mechanism, during the processing and clamping of the shaft gear, it is only necessary to place the shaft gear into the upper and lower centers for positioning. The clamping ring 5 can move radially on the fixture seat 6, and can adjust its radial clamping position according to the actual situation of the shaft gear clamping outer circle under the action of the single-acting cylinder 9. There is no coaxial requirement for the clamped shaft gear outer circle relative to the center holes at both ends, and the shaft gear clamping will not be over-positioned to affect the clamping and processing accuracy of the shaft gear. The whole process is simple to operate and easy to use, the shaft gear positioning accuracy is high, the clamping is convenient, the operation requirements are reduced, and the processing and clamping time are saved. The structure is stable and reliable.

[0034] Furthermore, the fixture base 6 includes a fixture base 601, the outer circumference of which is uniformly machined with multiple notches 602. A center column 603 is provided at the top center of the fixture base 601. A top positioning sleeve 604 is provided at the top center of the center column 603. The top positioning sleeve 604 is machined with radially arranged U-shaped grooves 606. A guide groove 607 is machined on the top positioning sleeve 604 and located on the opposite side of the U-shaped groove 606. A top threaded hole 605 is machined on the top surface of the top positioning sleeve 604. A top cavity 608 for accommodating the shaft gear 2 is machined at the top center of the top positioning sleeve 604. By using the above-mentioned fixture base 6, the entire clamping mechanism can be mounted and assembled.

[0035] Furthermore, there is at least a 0.5mm clearance between the inner hole of the clamping ring 5 and the outer circumference of the top positioning sleeve 604. This clearance fit ensures that the clamping ring 5 can be radially adjusted on the top positioning sleeve 604, thereby facilitating the subsequent radial adaptive clamping of the shaft gear 2 and preventing over-positioning of the shaft gear 2.

[0036] Furthermore, the positioning disc 4 includes a conical base plate 401, the top of which is machined with a support boss 403 for positioning the shaft gear 2. A first stepped hole 402 is machined on the conical base plate 401 for passing a first screw 3, which is used to secure the positioning disc 4 to the top of the top positioning sleeve 604. The bottom center of the conical base plate 401 is machined with an inner stepped hole 404 for mating with the top positioning sleeve 604. After being secured, the positioning disc 4 forms a certain gap with the top of the clamping ring 5. The positioning disc 4 can be used to provide axial support for the shaft gear and axially limit the clamping ring 5, thereby ensuring that the clamping ring 5 can be radially adjusted and moved on the top positioning sleeve 604.

[0037] Furthermore, the clamping ring 5 includes a clamping ring body 502, and a cylinder threaded hole 503 is radially processed on one side of the clamping ring body 502. The single-acting cylinder 9 is installed inside the cylinder threaded hole 503 by threaded fitting. The opposite side of the cylinder threaded hole 503 is radially processed with a guide plate mounting groove 501, and the bottom end of the guide plate mounting groove 501 is processed with multiple first screw blind holes 507. The first screw blind hole 507 cooperates with the second screw 13 and fixes the guide plate 14 inside the guide plate mounting groove 501; the guide plate mounting groove 501 is symmetrically processed with first threaded holes 504 on both sides, and the end of the first threaded hole 504 is processed with a steel ball hole 505, and the end of the steel ball hole 505 is provided with a tapered tail hole 506. The above-mentioned clamping ring 5 can ensure that after the axial clamping and positioning of the shaft gear is completed, the shaft gear is clamped in the circumferential direction. In addition, during the clamping process, the radial position of the clamping ring 5 is adjusted with the help of the single-acting cylinder 9 to adapt well to the radial position of the shaft gear 2 and realize radial clamping.

[0038] Furthermore, a nut 8 is mounted at the rear end of the threaded hole 503 of the cylinder, which is used to limit the position of the single-acting cylinder 9. A threaded hole 801 is machined in the center of the nut 8 for introducing hydraulic oil. A spring inside the single-acting cylinder 9 retracts the piston rod 901. External oil pressure further compresses the spring, causing the piston rod 901 to extend outward. This single-acting cylinder 9 provides radial clamping and fixation of the shaft gear 2.

[0039] Furthermore, the spring tensioning mechanism includes a spring 10 installed within the first threaded hole 504 and the steel ball hole 505. The tail end of the spring 10 is retained by a set screw 11 installed within the first threaded hole 504. The other end of the spring 10 presses against a steel ball 12 disposed within the steel ball hole 505. The outer diameter of the steel ball 12 is larger than that of the tapered tail hole 506. This spring tensioning mechanism facilitates positioning of the clamping ring 5 and the fixture base 6, and also facilitates subsequent removal of the clamping ring 5.

[0040] Furthermore, the steel ball 12 is pre-tightened by the compression spring 10, and the outer circle of the steel ball 12 is exposed at least 1.5 mm from the inner hole of the clamping ring 5. The above-mentioned size matching ensures that the clamping ring 5 can achieve radial movement adjustment.

[0041] Furthermore, the guide plate 14 is machined with multiple second stepped holes 1402 for receiving the second screws 13. Vertical grooves 1403 are machined on both sides of the guide plate 14. A tip 1401 is machined at one end of the guide plate 14 to mate with the outer diameter of the shaft gear 2. This guide plate 14 guides the radial movement of the clamping ring 5 and facilitates subsequent torque transmission. The vertical grooves 1403 also facilitate subsequent oil injection, providing lubrication.

[0042] Example 2: Another aspect of the present invention provides a method for driving a shaft gear to rotate, comprising the following steps: Step 1, assemble the upper parts of the clamping ring 5: Install the spring tightening mechanism inside the first threaded hole 504 and the steel ball hole 505 of the clamping ring 5, and pre-tighten the steel ball 12 using the set screw 11; Install the guide plate 14 inside the guide plate installation groove 501 of the clamping ring 5; Install the single-acting cylinder 9 inside the cylinder threaded hole 503 of the clamping ring 5; Step 2, installation of clamping ring 5: The assembled clamping ring 5 is installed as a whole on the clamp seat 6, and the entire clamping ring 5 is moved radially on the clamp seat 6 through the guide plate 14. The single-acting cylinder 9 is also placed in the U-shaped groove 606 of the clamp seat 6 and has no contact or interference with the clamp seat; Step 3, installation of positioning plate 4: Connect the positioning plate 4 to the clamp seat 6 via the first screw 3 to limit the axial movement of the clamping ring 5; Step 4, radial clamping adjustment of shaft gear 2: Place the shaft gear 2 on the lower top 7, press down through the upper top 1 until the end face fits against the end face of the positioning plate 4, and inject hydraulic oil through the screw hole on the nut 8. The hydraulic oil pushes the piston rod of the single-acting cylinder 9 to extend. When the piston rod of the single-acting cylinder contacts the shaft gear 2, it drives the clamping ring 5 to move radially until the guide plate 14 and the piston rod of the single-acting cylinder contact the shaft gear 2 at the same time. The shaft gear 2 is radially locked by the pressure of the hydraulic oil, and the steel ball 12 is compressed and retracted. Step 5, Rotation Processing of Shaft Gear 2: The fixture seat 6 rotates, and the guide groove 607 on the fixture seat 6 cooperates with the guide plate 14 to drive the entire clamping ring 5 and the shaft gear 2 to rotate, and the shaft gear 2 is processed synchronously; Step 6, Unloading of shaft gear 2: After the processing of shaft gear 2 is completed, the upper center moves up, the hydraulic oil stops supplying, the piston rod of the single-acting cylinder retracts, and the steel ball drives the clamping ring 5 to move radially under the action of the spring, so that the piston rod of the single-acting cylinder and the guide plate 14 leave the clamping outer circle of shaft gear 2 at the same time, and then the shaft gear 2 is taken out.

[0043] Example 3: Specific assembly working process and principle of the present invention: 1. Assemble the upper center, shaft gear, first screw, positioning plate, clamping ring, fixture seat, lower center, nut, single-acting cylinder, spring, set screw, steel ball, second screw and guide plate; 2. Install the steel ball and spring into the two first threaded holes 504 and the steel ball hole 505 of the clamping ring respectively. The two steel ball holes 505 are not completely penetrated in the clamping ring, so the steel ball cannot pass through the steel ball holes 505. Screw the set screws into the two first threaded holes 504 respectively, and pre-tighten the steel ball by compressing the spring. At this time, the outer circle of the steel ball will protrude 1.5mm from the inner hole of the clamping ring. 3. Fasten the guide plate into the guide plate mounting groove 501 of the clamping ring with the second screw; 4. Screw the single-acting cylinder into the threaded hole 503 of the radial cylinder in the clamping ring. The single-acting cylinder is an assembly. A spring inside the cylinder retracts the piston. External oil pressure further compresses the spring, causing the piston to extend outward. Screw the nut into the threaded hole 503 of the radial cylinder in the clamping ring to fit the single-acting cylinder and prevent it from retreating. The nut has a threaded hole for hydraulic oil to enter, which pushes the piston of the single-acting cylinder. 5. After completing the assembly in steps 2, 3, and 4, form a component for standby use; 6. Install the above five components onto the fixture base, with a 0.5mm gap between the inner hole of the clamping ring and the outer circle of the fixture base. Place the guide plate into the guide plate mounting groove 501 of the fixture base. The entire assembly can be radially moved in the guide plate mounting groove 501 of the fixture base by the guide plate. The single-acting cylinder can also be placed in the U-shaped groove of the fixture base without any contact or interference with the fixture base. 7. Connect the positioning plate to the fixture seat through the first screw, while limiting the axial movement of the clamping ring; 8. Place the shaft gear on the lower center, and press down through the upper center until the end face fits against the end face of the positioning plate. At this time, hydraulic oil is introduced through the screw hole on the nut, and the piston rod of the single-acting cylinder is pushed out by the hydraulic oil. When the piston rod of the single-acting cylinder contacts the upper shaft gear, it drives the entire assembly in the clamping ring 5 to move radially until the guide plate and the piston rod of the single-acting cylinder contact the workpiece at the same time, and the shaft gear is radially locked by the pressure of the hydraulic oil. At the same time, the steel ball is compressed and retracted. Since the entire assembly in the clamping ring 5 can move radially, the clamping outer circle of the shaft gear does not need to be coaxial with the center holes at both ends, and there is no over-positioning of the shaft gear clamping, which affects the clamping and processing accuracy of the shaft gear. 9. The fixture seat rotates, and the cooperation between the guide plate mounting groove 501 on the fixture seat and the guide plate drives the components and shaft gears in the entire clamping ring 5 to rotate; 10. After the shaft gear processing is completed, the upper center moves up, the hydraulic oil stops supplying, the piston rod of the single-acting cylinder retracts, and the steel ball drives the entire assembly in the clamping ring 5 to move radially under the action of the spring, so that the piston rod and guide plate of the single-acting cylinder leave the clamping outer circle of the shaft gear at the same time, and the shaft gear is taken out.

Claims

1. A clamping mechanism for driving a shaft gear to rotate during machining, characterized in that: It comprises a clamp seat (6), a clamping ring (5) is installed on the top positioning sleeve (604) of the clamp seat (6) through a clearance fit; a single-acting oil cylinder (9) is fixedly installed in the radial direction of one side of the clamping ring (5), the single-acting oil cylinder (9) passes through a U-shaped groove (606) provided on the top positioning sleeve (604), and a guide plate (14) is fixedly installed in the radial direction of the other side of the clamping ring (5), the guide plate (14) passes through a guide groove (607) provided on the top positioning sleeve (604); spring tightening mechanisms are installed in pairs in the radial direction of the clamping ring (5) and on both sides of the guide plate (14), and the spring tightening mechanisms are matched with the outer circle of the top positioning sleeve (604); a positioning disk (4) for axially limiting the clamping ring (5) is fixedly installed on the top of the clamp seat (6); It also includes an upper center (1) and a lower center (7) for tightening the axial ends of the shaft gear (2).

2. The clamping mechanism for driving a shaft gear to rotate during machining according to claim 1, characterized in that: The fixture seat (6) includes a fixture base (601), the outer circle of the fixture base (601) is uniformly processed with multiple notches (602), the top center of the fixture base (601) is provided with a center column (603), the top center of the center column (603) is provided with a top positioning sleeve (604), the top positioning sleeve (604) is processed with radially arranged U-shaped grooves (606), the top positioning sleeve (604) is processed with guide grooves (607) on the opposite side of the U-shaped groove (606), and the top surface of the top positioning sleeve (604) is processed with a top threaded hole (605); the top center of the top positioning sleeve (604) is processed with a top cavity (608) for accommodating the shaft gear (2).

3. The clamping mechanism for driving a shaft gear to rotate during machining according to claim 2, characterized in that: There is at least a 0.5 mm gap between the inner hole of the clamping ring (5) and the outer circle of the top positioning sleeve (604).

4. The clamping mechanism for driving a shaft gear to rotate during machining according to claim 1, characterized in that: The positioning plate (4) includes a conical base plate (401), the top of the conical base plate (401) is processed with a supporting boss (403) for positioning the shaft gear (2), the conical base plate (401) is processed with a first stepped hole (402) for passing a first screw (3), the first screw (3) is used to fix the positioning plate (4) to the top of the top positioning sleeve (604), and the center of the bottom end of the conical base plate (401) is processed with an inner stepped hole (404) for matching with the top positioning sleeve (604); after being fixed, the positioning plate (4) forms a certain gap with the top of the clamping ring (5).

5. The clamping mechanism for driving a shaft gear to rotate during machining according to claim 2, characterized in that: The clamping ring (5) includes a clamping ring body (502), a cylinder threaded hole (503) is radially processed on one side of the clamping ring body (502), and the single-acting cylinder (9) is installed inside the cylinder threaded hole (503) through threaded engagement. A guide plate mounting groove (501) is radially processed on the opposite side of the cylinder threaded hole (503), and a plurality of first screw blind holes (507) are processed at the bottom end of the guide plate mounting groove (501). The first screw blind holes (507) cooperate with the second screws (13) to fix the guide plate (14) inside the guide plate mounting groove (501); First threaded holes (504) are symmetrically processed on both sides of the guide plate mounting groove (501), steel ball holes (505) are processed at the ends of the first threaded holes (504), and a tapered tail hole (506) is provided at the ends of the steel ball holes (505).

6. The clamping mechanism for driving a shaft gear to rotate during machining according to claim 5, characterized in that: A nut (8) for limiting the position of the single-acting oil cylinder (9) is installed at the tail end of the oil cylinder threaded hole (503), and a threaded hole (801) for introducing hydraulic oil is machined in the center of the nut (8); The single-acting oil cylinder (9) is internally provided with a spring to keep the piston rod (901) of the oil cylinder in a retracted state, and the spring is further compressed under the action of external oil pressure to cause the piston rod (901) to extend outward.

7. The clamping mechanism for driving a shaft gear to rotate during machining according to claim 6, characterized in that: The spring tightening mechanism includes a spring (10) installed inside the first threaded hole (504) and the steel ball hole (505), the tail of the spring (10) is limited by a set screw (11) installed inside the first threaded hole (504), and the other end of the spring (10) presses the steel ball (12) set inside the steel ball hole (505), and the outer diameter of the steel ball (12) is larger than the outer diameter of the tapered tail hole (506).

8. The clamping mechanism for driving a shaft gear to rotate during machining according to claim 7, characterized in that: The steel ball (12) is pre-tightened by the compression spring (10), and at this time, the outer circle of the steel ball (12) is exposed from the inner hole of the clamping ring (5) by at least 1.5 mm.

9. The clamping mechanism for driving a shaft gear to rotate during machining according to claim 7, characterized in that: The guide plate (14) is machined with a plurality of second stepped holes (1402) for passing the second screws (13), vertical grooves (1403) are machined on both sides of the guide plate (14), and a top end (1401) is machined on one end of the head of the guide plate (14) for matching with the outer circle of the shaft gear (2).

10. A method for driving a shaft gear to rotate, characterized in that: The method is implemented by using a clamping mechanism for driving a shaft gear to rotate as described in any one of claims 6 to 9, comprising the following steps: Step 1, assembly of the upper parts of the clamping ring (5): Install the spring tightening mechanism inside the first threaded hole (504) and the steel ball hole (505) of the clamping ring (5), and pre-tighten the steel ball (12) by means of the set screw (11); Install the guide plate (14) inside the guide plate mounting groove (501) of the clamping ring (5); Install the single-acting oil cylinder (9) inside the oil cylinder threaded hole (503) of the clamping ring (5); Step 2, installation of the clamping ring (5): The assembled clamping ring (5) is installed as a whole on the clamp seat (6), and the entire clamping ring (5) is moved radially on the clamp seat (6) through the guide plate (14). The single-acting cylinder (9) is also placed in the U-shaped groove (606) of the clamp seat (6) and has no contact or interference with the clamp seat; Step 3, installation of positioning plate (4): Connecting the positioning plate (4) to the clamp seat (6) via the first screw (3) to thereby limit the axial movement of the clamping ring (5); Step 4, radial clamping adjustment of the shaft gear (2): Place the shaft gear (2) on the lower top (7), press down through the upper top (1) until the end face is attached to the end face of the positioning plate (4), and introduce hydraulic oil through the screw hole on the nut (8). The hydraulic oil pushes the piston rod of the single-acting oil cylinder (9) to extend. When the piston rod of the single-acting oil cylinder contacts the shaft gear (2), it drives the clamping ring (5) to move radially until the guide plate (14) and the piston rod of the single-acting oil cylinder contact the shaft gear (2) at the same time, and the shaft gear (2) is radially locked by the pressure of the hydraulic oil, and the steel ball (12) is compressed and retracted. Step 5, Rotation processing of shaft gear (2): The fixture seat (6) rotates, and the entire clamping ring (5) and the shaft gear (2) are driven to rotate through the cooperation of the guide groove (607) on the fixture seat (6) and the guide plate (14), and the shaft gear (2) is processed synchronously; Step 6, Unloading of the shaft gear (2): After the machining of the shaft gear (2) is completed, the top center moves upward, the hydraulic oil stops supplying, the piston rod of the single-acting oil cylinder retracts, and the steel ball drives the clamping ring (5) to move radially under the action of the spring, so that the piston rod of the single-acting oil cylinder and the guide plate (14) leave the clamping outer circle of the shaft gear (2) at the same time, and then the shaft gear (2) is taken out.

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