Positioning clamp for gear machining

Abstract

The invention relates to the technical field of gear machining and positioning, in particular to a positioning clamp for gear machining, which comprises a box body, a positioning frame for machining a gear is arranged at the top of the box body, and an overturning assembly for overturning the positioning frame to adjust the angle is arranged at the top of the box body. A rotating base plate for placing a gear body is arranged at the center of the top of the positioning frame through a bearing, a clamping box is arranged at the top of the positioning frame, a clamping base frame is movably arranged in the clamping box, and an arc-shaped clamping groove plate for limiting a tooth groove of the gear body is movably arranged at the top of the clamping base frame; tooth groove positioning of gears of different specifications is completed through the arc-shaped clamping groove plate, meshing clamping of the gears after tooth groove positioning is achieved through the first arc-shaped base, the second arc-shaped base and the arc-shaped clamping block, and connection of the arc-shaped clamping groove plate and tooth grooves is more stable through clamping reaction force transmission of the arc-shaped clamping base; and the arc-shaped clamping seats meet the positioning and fitting requirements of different gears, and the adaptability of the positioning clamp is high.

Description

Technical Field

[0001] The invention relates to the technical field of gear machining and positioning, and in particular to a positioning fixture used for gear machining. Background Art

[0002] Transmission gears often work under high speed, high load, and constantly changing speed and load conditions. They are important structural parts in automobile gearboxes. During the processing of transmission gears, their surfaces need to be positioned, polished or drilled, which directly affects the installation accuracy and performance of transmission gears. Therefore, the demand for tooling and fixtures for transmission gears is increasing. By adjusting the clamping force and clamping position of the fixture, it can be ensured that the transmission gears maintain a stable posture and precise position during the processing, thereby improving the processing accuracy and efficiency.

[0003] At present, in the processing of transmission gears, the previous manual control of transmission gear processing has been changed to positioning and clamping using a positioning fixture. However, when the transmission gear is used in combination with the positioning fixture, the staff is required to place the transmission gear at the center of the positioning fixture, and then align the clamp in the positioning fixture with the tooth groove on the transmission gear, and then use the positioning fixture to drive the clamp and the tooth groove to align and clamp. This positioning method requires a lot of manual preparation, and in the positioning of tooth grooves of different sizes and different spacings, the size and position of the clamp need to be constantly adjusted to adapt to transmission gears of different sizes. For example, when the clamp enters a larger tooth groove, the transmission gear processing will cause the clamp to rotate and offset in the tooth groove, resulting in reduced processing quality of the transmission gear or even scrapping. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, the present invention provides a positioning fixture for gear machining.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a positioning fixture for gear processing, comprising a box body, a positioning frame for processing the gear is provided on the top of the box body, a flip assembly for flipping and adjusting the angle of the positioning frame is provided on the top of the box body, a rotating chassis for placing the gear body is provided at the center of the top of the positioning frame through a bearing, a clamping box is provided on the top of the positioning frame, a clamping base frame is movably provided in the clamping box, an arc-shaped card slot plate for limiting the tooth groove of the gear body is movably provided on the top of the clamping base frame, a limiting assembly for limiting the side of the gear body is provided in the clamping box, and the limiting assembly includes: A first gear is arranged in the clamping box, a triangular tooth block meshing with the first gear is fixedly installed on the arc-shaped slot plate, a telescopic spring is installed on the end of the clamping base frame away from the gear body through a connecting plate, and the telescopic spring is installed on the arc-shaped slot plate, the bottom of the first gear is connected to the second gear through a rotating column, and the first gear is meshed with a movable tooth plate; An arc-shaped clamp seat is arranged around the gear body, the top of the movable tooth plate is connected to the arc-shaped clamp seat through an arc-shaped rod, the arc-shaped clamp seat is movably provided with a first arc-shaped seat on a side close to the gear body, the first arc-shaped seat is movably provided with a second arc-shaped seat on a side close to the gear body, and the second arc-shaped seat is fixedly installed with an arc-shaped clamp block for positioning the gear body; The positioning frame is provided with a motion component for performing relative motion on the clamping base frame.

[0006] As a preferred technical solution of the present invention, the flip assembly includes a push block that drives the positioning frame to move, a fixture bottom plate is fixedly installed on the top of the box body by bolts, an arc-shaped side plate for flipping the positioning frame is fixedly installed on the top of the fixture bottom plate, the arc-shaped side plate is provided with an arc-shaped flip groove, the positioning frame is fixedly installed with a T-shaped fixing ring that matches the arc-shaped flip groove by bolts, and the T-shaped fixing ring is slidably arranged in the arc-shaped flip groove; An electric telescopic rod is fixedly installed with bolts at the center of one end of the clamp bottom plate away from the arc-shaped side plate, a rotating seat is fixedly installed with bolts at the bottom of the positioning frame, the rotating seat is movably connected to the pushing block via a rotating shaft, and the output end of the electric telescopic rod is installed at the bottom of the pushing block via a connecting plate.

[0007] A first guide rail is fixedly installed on the top of the fixture bottom plate by bolts, a first guide block is slidably connected to the top of the first guide rail, and a top of the first guide block is fixedly installed on the bottom of the connecting plate by bolts.

[0008] As a preferred technical solution of the present invention, the interior of the clamping box is movably connected to a supporting shaft via a bearing, the first gear and the second gear are fixedly installed at the center of the supporting shaft, the clamping box is provided with a gear groove on one side close to the clamping base frame, the first gear and the second gear are both arranged in the gear groove, and the first gear is movably engaged with the triangular gear block through the gear groove.

[0009] The clamping box is fixedly installed with a second guide rail on a side close to the gear body by bolts, and a second guide block is slidably connected to the second guide rail. The movable tooth plate is fixedly installed on the top of the second guide block by bolts. The clamping box is provided with a movable groove that matches the size of the arc rod on a side close to the gear body, and the arc rod is slidably arranged in the movable groove.

[0010] As a preferred technical solution of the present invention, the motion component includes a servo motor fixedly installed at one end of the positioning frame by bolts, the output end of the servo motor is connected to a rotating rod, both ends of the rotating rod are provided with positive and negative threads, both ends of the rotating rod are connected to a movable block by the positive and negative threads, the top of the movable block is fixedly installed with a movable plate by bolts, a limiting rod is fixedly installed in the positioning frame by bolts, and both ends of the movable block movably pass through the limiting rod.

[0011] A third guide rail is fixedly installed on the inner bottom of the clamping base frame by bolts, a third guide block is slidably connected to the top of the third guide rail, and the top of the third guide block is fixedly installed on the bottom of the arc-shaped slot plate by bolts.

[0012] As a preferred technical solution of the present invention, the arc clamp seat is provided with a first rotation groove, the arc clamp seat is provided with a first positioning groove in the first rotation groove, the arc clamp seat is slidably connected with a first positioning block in the first positioning groove, the first arc seat is fixedly installed on the top of the first positioning block, the first arc seat is provided with a second rotation groove, the first arc seat is provided with a second positioning groove in the second rotation groove, the first arc seat is slidably connected with a second positioning block in the second positioning groove, and the second arc seat is installed on the top of the second positioning block.

[0013] A motion groove that matches the size of the movable plate is provided on the top of the positioning frame, and the movable plate is slidably arranged in the motion groove. A control button is fixedly installed on the top of the box body at the end away from the electric telescopic rod by bolts, and a support plate for supporting the positioning frame is provided on the top of the arc-shaped side panel.

[0014] Compared with the prior art, the present invention can achieve the following beneficial effects: 1. The tooth groove positioning of gears of different specifications is completed through the arc-shaped slot plate. In the tooth groove positioning, the triangular tooth block is used to cooperate with the first gear, the second gear and the movable tooth plate to complete the arc-shaped clamping seat to clamp the gear on all sides. The first arc-shaped seat, the second arc-shaped seat and the arc-shaped clamping block are used to realize the meshing clamping of the gear after the tooth groove positioning. The meshing clamping improves the stability of the positioning by increasing the friction. The clamping reaction force transmission of the arc-shaped clamping seat makes the connection between the arc-shaped slot plate and the tooth groove more stable. The movable first arc-shaped seat, the second arc-shaped seat and the arc-shaped clamping block on the arc-shaped clamping seat meet the positioning and fitting of different gears, and the positioning fixture has strong adaptability.

[0015] 2. The gear body on the rotating chassis is positioned in the tooth groove during the movement of the arc-shaped slot plate. The compression reaction force of the arc-shaped slot plate on the telescopic spring makes the positioning of the tooth groove more stable. At the same time, the triangular tooth block of the arc-shaped slot plate cooperates with the first gear, and the engagement between the tooth block and the gear ensures the stability of the arc-shaped slot plate in the tooth groove.

[0016] 3. The arc clamp seat is movably connected to the first arc seat, the first arc seat is movably connected to the second arc seat, and the second arc seat is movably connected to the arc clamp block. When the arc clamp seat clamps the gear, the arc clamp block can automatically adapt to the clamping and meshing of different gears. There is no need to replace or adjust the equipment when processing and positioning different gears, which reduces the labor intensity of operators and improves the efficiency of gear processing.

[0017] 4. The gear is clamped by the arc-shaped slot plate on the clamping base frame through the movable block. The tighter the arc-shaped slot plate clamps the gear, the greater the compression degree of the telescopic spring by the arc-shaped slot plate, and the arc-shaped clamp seat will also clamp the side of the gear synchronously. When the degree of compression of the telescopic spring increases, the reaction force becomes larger according to physics, which will drive the arc-shaped slot plate and the tooth groove of the gear to be more firmly against each other, and at the same time, the meshing between the tooth block and the first gear will be tighter without any gap shaking. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the box structure of the present invention; Figure 2 It is a structural schematic diagram of the clamp bottom plate of the present invention; Figure 3 It is a structural schematic diagram of the arc-shaped side plate of the present invention; Figure 4 It is a structural schematic diagram of the positioning frame of the present invention; Figure 5 It is a schematic diagram of the structure inside the clamping box of the present invention; Figure 6 It is a structural schematic diagram of the clamping base frame of the present invention; Figure 7 It is a structural schematic diagram of the arc-shaped slot plate of the present invention; Figure 8It is a structural schematic diagram of the telescopic spring of the present invention; Fig. 9 It is a structural schematic diagram of the arc-shaped clamp seat of the present invention; Fig.10 It is a structural schematic diagram of the first arc-shaped seat of the present invention; Fig.11 It is a structural schematic diagram of the movable tooth plate of the present invention; Fig.12 It is a structural schematic diagram of the triangular gear block of the present invention; Fig.13 This is a schematic diagram of the connection structure of the push block of the present invention; Fig.14 It is a structural schematic diagram of the movable block of the present invention.

[0019] Among them: 10, box body; 11, gear body; 12, fixture bottom plate; 13, control button; 14, arc clamp block; 15, rotating chassis; 20, positioning frame; 21, servo motor; 22, rotating rod; 23, positive and negative threads; 24, movable block; 25, movable plate; 26, limit rod; 27, motion slot; 28, support plate; 30, clamping base frame; 31, arc slot plate; 32, triangular tooth block; 33, connecting plate; 34, telescopic spring; 35, third guide rail; 36, third guide block; 40, clamping box; 41, first gear; 42, rotating column; 43, second gear; 44, Movable tooth plate; 45, supporting shaft; 46, gear groove; 47, second guide rail; 48, second guide block; 49, movable groove; 50, arc clamp seat; 51, first arc seat; 52, second arc seat; 53, second positioning block; 54, arc rod; 55, first rotating groove; 56, first positioning groove; 57, first positioning block; 58, second rotating groove; 59, second positioning groove; 60, arc side plate; 61, arc flip groove; 62, T-shaped fixing ring; 63, electric telescopic rod; 64, rotating seat; 65, connecting plate; 66, first guide rail; 67, first guide block; 68, pushing block. DETAILED DESCRIPTION

[0020] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work all belong to the protection scope of the present invention. The experimental methods in the following embodiments, unless otherwise specified, are conventional methods, and the materials, reagents, etc. used in the following embodiments, unless otherwise specified, can all be obtained from commercial channels.

[0021] Embodiment: Figure 1 , Figure 2 , Figure 5, Figure 6 , Figure 7 , Fig. 9 , Fig.10 , Fig.11 and Fig.12 As shown, it includes a box body 10, a positioning frame 20 for processing gears is provided on the top of the box body 10, a flip assembly for flipping the positioning frame 20 to adjust the angle is provided on the top of the box body 10, a rotating chassis 15 for placing the gear body 11 is provided at the center of the top of the positioning frame 20 through a bearing, a clamping box 40 is provided on the top of the positioning frame 20, a clamping base frame 30 is movably provided in the clamping box 40, an arc-shaped card slot plate 31 for limiting the tooth groove of the gear body 11 is movably provided on the top of the clamping base frame 30, a limiting assembly for limiting the side of the gear body 11 is provided in the clamping box 40, and the limiting assembly includes: A first gear 41 is arranged in the clamping box 40, and a triangular tooth block 32 meshing with the first gear 41 is fixedly installed on the arc-shaped slot plate 31. A telescopic spring 34 is installed at the end of the clamping base frame 30 away from the gear body 11 through a connecting plate 33, and the telescopic spring 34 is installed on the arc-shaped slot plate 31. The bottom of the first gear 41 is connected to the second gear 43 through a rotating column 42. The first gear 41 is meshed with a movable tooth plate 44, and the movable gear is driven to move relative to each other through rotational meshing.

[0022] An arc-shaped clamp seat 50 is arranged around the gear body 11, and the top of the movable tooth plate 44 is connected to the arc-shaped clamp seat 50 through an arc-shaped rod 54. The arc-shaped clamp seat 50 is used to perform irregular clamping and limiting on the four sides of the gear body 11. The arc-shaped clamp seat 50 is movably provided with a first arc-shaped seat 51 on the side close to the gear body 11, and the first arc-shaped seat 51 is movably provided with a second arc-shaped seat 52 on the side close to the gear body 11. The second arc-shaped seat 52 is fixedly installed with an arc-shaped clamp block 14 for positioning the gear body 11. The fit and clamping of the arc-shaped clamp block 14 and the side of the gear body 11 are continuously adjusted by the first arc-shaped seat 51, the second arc-shaped seat 52 and the arc-shaped clamp seat 50.

[0023] The positioning frame 20 is provided with a motion component for relative movement of the clamping base frame 30. The motion component drives the entire clamping base frame 30 to move relative to each other. At the same time, the relative movement of the clamping base frame 30 drives the surrounding arc-shaped clamping seats 50 to perform lateral clamping movement.

[0024] See also Figure 1 , Figure 2 , Figure 3 and Fig.13The flip assembly includes a pushing block 68 for driving the positioning frame 20 to move, a fixture bottom plate 12 is fixedly installed on the top of the box body 10 by bolts, and an arc-shaped side plate 60 for flipping and supporting the positioning frame 20 is fixedly installed on the top of the fixture bottom plate 12, and an arc-shaped flip groove 61 is opened on the arc-shaped side plate 60, and a T-shaped fixing ring 62 that matches the arc-shaped flip groove 61 is fixedly installed on the positioning frame 20 by bolts, and the T-shaped fixing ring 62 is slidably set in the arc-shaped flip groove 61. When the positioning frame 20 is in horizontal motion, the angle is adjusted by the limiting motion of the T-shaped fixing ring 62 in the arc-shaped flip groove 61, so that the positioning frame 20 is switched from a horizontal state to a vertical state and any processing angle, which is convenient for subsequent operators to operate and process the gear body 11, and improves the processing efficiency of the workshop workers on the gear body 11.

[0025] An electric telescopic rod 63 is fixedly installed with bolts at the center of one end of the clamp base plate 12 away from the arc-shaped side plate 60, and a rotating seat 64 is fixedly installed with bolts at the bottom of the positioning frame 20. The rotating seat 64 is movably connected to a pushing block 68 through a rotating shaft. The output end of the electric telescopic rod 63 is installed at the bottom of the pushing block 68 through a connecting plate 65. The positioning frame 20 is pushed horizontally in the rotating seat 64 by the pushing block 68. The pushing block 68 drives the positioning frame 20 to move horizontally and cooperates with the arc-shaped flip groove 61 and the T-shaped fixing ring 62 to realize the flipping movement.

[0026] A first guide rail 66 is fixedly installed on the top of the fixture base plate 12 by bolts, and a first guide block 67 is slidably connected to the top of the first guide rail 66. The top of the first guide block 67 is fixedly installed on the bottom of the connecting plate 65 by bolts, so that the connecting plate 65 drives the pushing block 68 to perform stable horizontal movement. The positioning frame 20 is stable and smooth during the flipping process, and the positioning frame 20 is more stable after flipping and will not produce processing shaking.

[0027] See also Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig.11 and Fig.12The inside of the clamping box 40 is movably connected with a supporting shaft 45 through a bearing, and the first gear 41 and the second gear 43 are fixedly installed at the center of the supporting shaft 45. The clamping box 40 is provided with a gear groove 46 on one side close to the clamping base frame 30. The first gear 41 and the second gear 43 are both arranged in the gear groove 46. The first gear 41 is movably engaged with the triangular tooth block 32 through the gear groove 46. The horizontally moving arc slot plate 31 drives the first gear 41 to rotate through the engagement of the triangular tooth block 32. During the horizontal movement, the arc slot plate 31 can complete the tooth groove positioning of the gear body 11, and at the same time, the arc slot plate 31 compresses and accumulates force on the telescopic spring 34. The reaction force of the telescopic spring 34 causes the arc slot plate 31 to relatively clamp the tooth groove of the gear body 11.

[0028] The clamping box 40 is fixed with a second guide rail 47 by bolts on the side close to the gear body 11, and a second guide block 48 is slidably connected to the second guide rail 47. A movable tooth plate 44 is fixed with bolts on the top of the second guide block 48. The clamping box 40 is provided with a movable groove 49 that matches the size of the arc rod 54 on the side close to the gear body 11, and the arc rod 54 is slidably set in the movable groove 49. The second gear 43 drives the movable tooth plate 44 to perform stable and smooth horizontal movement in the second guide rail 47, and then drives the arc clamp seat 50 to relatively clamp the four sides of the gear body 11 through the arc rod 54.

[0029] See also Figure 1 , Figure 5 , Figure 6 , Fig.12 and Fig.14 The motion component includes a servo motor 21 fixedly installed at one end of the positioning frame 20 by bolts, the output end of the servo motor 21 is connected to a rotating rod 22, and both ends of the rotating rod 22 are provided with positive and negative threads 23, and both ends of the rotating rod 22 are connected to movable blocks 24 through positive and negative threads 23. The top of the movable block 24 is fixedly installed with a movable plate 25 by bolts, and a limit rod 26 is fixedly installed in the positioning frame 20 by bolts. Both ends of the movable block 24 are movable and penetrate the limit rod 26. The movable block 24 is more stable to convert linear motion by thread rotation, so that the relative motion of the clamping base frame 30 is more stable, and the motion controllable performance of the clamping base frame 30 is strong. During the whole motion process, the arc-shaped slot plate 31 is slowly matched to align the tooth groove of the gear body 11 more precisely and stably.

[0030] A third guide rail 35 is fixedly installed on the inner bottom of the clamping base frame 30 by bolts, and a third guide block 36 is slidably connected to the top of the third guide rail 35. The top of the third guide block 36 is fixedly installed on the bottom of the arc-shaped slot plate 31 by bolts. The arc-shaped slot plate 31 runs stably in the third guide rail 35, and the arc-shaped slot plate 31 will not be offset during the clamping process of the gear body 11.

[0031] See also Figure 1 , Figure 4 , Figure 5 , Fig. 9 , Fig.10 and Fig.13 The arc clamp seat 50 is provided with a first rotation groove 55, and a first positioning groove 56 is provided in the first rotation groove 55. The arc clamp seat 50 is slidably connected with a first positioning block 57 in the first positioning groove 56. The first arc seat 51 is fixedly installed on the top of the first positioning block 57. The first arc seat 51 is provided with a second rotation groove 58. The first arc seat 51 is provided with a second positioning groove 59 in the second rotation groove 58. The first arc seat 51 is slidably connected with a second positioning block 53 in the second positioning groove 59. The second arc seat 52 is installed on the top of the second positioning block 53. Through the first rotation groove 55 and the second rotation groove 58, the first arc seat 51 and the second arc seat 52 can stably rotate and adjust when clamping the gear body 11, so that the arc clamp block 14 completes the fitting of the gear body 11.

[0032] A motion groove 27 that matches the size of the movable plate 25 is provided on the top of the positioning frame 20, and the movable plate 25 is slidably set in the motion groove 27. A control button 13 is fixedly installed on the top of the box body 10 at the end away from the electric telescopic rod 63 by bolts. The electric telescopic rod 63 and the servo motor 21 are controlled by the control button 13. A support plate 28 for supporting the positioning frame 20 is provided on the top of the arc-shaped side panel 60, and the support plate 28 is used to keep the positioning frame 20 horizontally supported.

[0033] Working principle: Place the gear body 11 to be processed on the top of the rotating chassis 15, and use the control button 13 to make the servo motor 21 work. The rotation of the servo motor 21 drives the movable block 24 on the rotating rod 22 to achieve relative movement under the action of the positive and negative threads 23 and the limit rod 26. During the movement of the movable block 24, the clamping base frame 30 in the clamping box 40 is driven to move relative to each other through the movable plate 25 and the motion groove 27. The arc-shaped card slot plate 31 on the top of the clamping base frame 30 will move against each other at both ends of the gear body 11. The arc-shaped card slot plate 31 will cooperate with the rotating chassis 15 to enter the tooth groove of the gear body 11, and the tooth groove of the gear body 11 is relatively positioned and clamped by the arc-shaped card slot plate 31 that moves relatively. After the arc-shaped slot plate 31 in the clamping base frame 30 performs tooth groove positioning on the gear body 11, the clamping base frame 30 is in continuous relative motion, and the arc-shaped slot plate 31 compresses the telescopic spring 34 in the clamping base frame 30 through the third guide rail 35 and the third guide block 36. During the compression movement of the telescopic spring 34, the arc-shaped slot plate 31 meshes with the first gear 41 through the triangular tooth block 32. The movement of the arc-shaped slot plate 31 will drive the first gear 41 on the supporting shaft 45 to rotate. The first gear 41 synchronously drives the second gear 43 to rotate through the rotating column 42. The second gear 43 rotates and meshes to drive the movable tooth plate 44 on the second guide rail 47 to move horizontally. During the horizontal movement, the movable tooth plate 44 drives the arc-shaped clamping seat 50 to perform relative clamping movement on the side of the gear body 11 through the arc-shaped rod 54 and the movable groove 49. When the arc-shaped clamp seat 50 abuts against the side of the gear body 11, the first arc-shaped seat 51 is rotated by the first rotation groove 55, the first positioning groove 56 and the first positioning block 57 on the arc-shaped clamp seat 50, and the arc-shaped clamp block 14 abutting against the side of the gear body 11 is rotated by the second rotation groove 58, the second positioning groove 59 and the second positioning block 53, so that the arc-shaped clamp block 14 on the second arc-shaped seat 52 can bite the tooth groove and the tooth on the side of the gear body 11, so that the arc-shaped clamp seat 50 can clamp and position the gear bodies 11 of different sizes. During the processing, the connecting plate 65 connected to the top of the first guide rail 66 is driven to move horizontally through the electric telescopic rod 63 of the clamp base plate 12. The connecting plate 65 will drive the pushing block 68 to cooperate with the rotating seat 64 under the positioning frame 20 to move horizontally. During the horizontal movement, the positioning frame 20 realizes a flipping movement through the arc-shaped side plates 60, the arc-shaped flipping groove 61 and the T-shaped fixing ring 62 at both ends, so that the positioning frame 20 can realize a flipping movement from a horizontal state to a vertical state at the top of the clamp base plate 12, and adjust the inclination angle of the gear body 11 on the positioning frame 20 to facilitate subsequent workshop operators to perform processing operations on the gear body 11.

[0034] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A positioning fixture for gear processing, comprising a box (10), characterized in that: A positioning frame (20) for processing the gear is provided on the top of the box body (10), a flip assembly for flipping and adjusting the angle of the positioning frame (20) is provided on the top of the box body (10), a rotating chassis (15) for placing the gear body (11) is provided at the center of the top of the positioning frame (20) through a bearing, a clamping box (40) is provided on the top of the positioning frame (20), a clamping base frame (30) is movably provided in the clamping box (40), an arc-shaped slot plate (31) for limiting the tooth groove of the gear body (11) is movably provided on the top of the clamping base frame (30), a limiting assembly for limiting the side of the gear body (11) is provided in the clamping box (40), and the limiting assembly includes: A first gear (41) is arranged in the clamping box (40); a triangular tooth block (32) meshing with the first gear (41) is fixedly mounted on the arc-shaped slot plate (31); a telescopic spring (34) is mounted on the end of the clamping base frame (30) away from the gear body (11) via a connecting plate (33); and the telescopic spring (34) is mounted on the arc-shaped slot plate (31); a second gear (43) is connected to the bottom of the first gear (41) via a rotating column (42); and the first gear (41) is meshingly connected with a movable tooth plate (44); an arc-shaped clamp seat (50) arranged around the gear body (11); the top of the movable tooth plate (44) is connected to the arc-shaped clamp seat (50) via an arc-shaped rod (54); the arc-shaped clamp seat (50) is movably provided with a first arc-shaped seat (51) on a side close to the gear body (11); the first arc-shaped seat (51) is movably provided with a second arc-shaped seat (52) on a side close to the gear body (11); the second arc-shaped seat (52) is fixedly installed with an arc-shaped clamp block (14) for positioning the gear body (11); A motion component for performing relative motion on the clamping base frame (30) is arranged in the positioning frame (20).

2. A positioning fixture for gear machining according to claim 1, characterized in that: The flip assembly comprises a push block (68) for driving the positioning frame (20) to move, a fixture bottom plate (12) is fixedly mounted on the top of the box body (10) by means of bolts, an arc-shaped side plate (60) is fixedly mounted on the top of the fixture bottom plate (12) for supporting the positioning frame (20) to flip, the arc-shaped side plate (60) is provided with an arc-shaped flip groove (61), a T-shaped fixing ring (62) which matches the arc-shaped flip groove (61) is fixedly mounted on the positioning frame (20) by means of bolts, and the T-shaped fixing ring (62) is slidably arranged in the arc-shaped flip groove (61); An electric telescopic rod (63) is fixedly mounted on the center of one end of the clamp bottom plate (12) away from the arc-shaped side plate (60) by means of bolts, a rotating seat (64) is fixedly mounted on the bottom of the positioning frame (20) by means of bolts, the rotating seat (64) is movably connected to the pushing block (68) via a rotating shaft, and an output end of the electric telescopic rod (63) is mounted on the bottom of the pushing block (68) via a connecting plate (65).

3. A positioning fixture for gear machining according to claim 2, characterized in that: A first guide rail (66) is fixedly mounted on the top of the fixture bottom plate (12) by means of bolts, a first guide block (67) is slidably connected to the top of the first guide rail (66), and the top of the first guide block (67) is fixedly mounted on the bottom of the connecting plate (65) by means of bolts.

4. A positioning fixture for gear machining according to claim 1, characterized in that: The clamping box (40) is movably connected to a support shaft (45) via a bearing. The first gear (41) and the second gear (43) are fixedly mounted at the center of the support shaft (45). The clamping box (40) is provided with a gear groove (46) on a side close to the clamping base frame (30). The first gear (41) and the second gear (43) are both arranged in the gear groove (46). The first gear (41) is movably meshed with the triangular gear block (32) via the gear groove (46).

5. The positioning fixture for gear machining according to claim 1, characterized in that: The clamping box (40) is provided with a second guide rail (47) fixedly mounted by bolts on a side close to the gear body (11); a second guide block (48) is slidably connected to the second guide rail (47); the movable tooth plate (44) is fixedly mounted on the top of the second guide block (48) by bolts; the clamping box (40) is provided with a movable groove (49) on a side close to the gear body (11) and the size of the movable groove (49) matches that of the arc rod (54); and the arc rod (54) is slidably arranged in the movable groove (49).

6. A positioning fixture for gear machining according to claim 3, characterized in that: The motion assembly comprises a servo motor (21) fixedly mounted at one end of the positioning frame (20) by means of bolts, the output end of the servo motor (21) is connected to a rotating rod (22), both ends of the rotating rod (22) are provided with positive and negative threads (23), both ends of the rotating rod (22) are connected to a movable block (24) by means of the positive and negative threads (23), a movable plate (25) is fixedly mounted at the top of the movable block (24) by means of bolts, a limiting rod (26) is fixedly mounted in the positioning frame (20) by means of bolts, and both ends of the movable block (24) movably penetrate the limiting rod (26).

7. A positioning fixture for gear machining according to claim 1, characterized in that: A third guide rail (35) is fixedly mounted on the inner bottom of the clamping base frame (30) by means of bolts, a third guide block (36) is slidably connected to the top of the third guide rail (35), and the top of the third guide block (36) is fixedly mounted on the bottom of the arc-shaped slot plate (31) by means of bolts.

8. The positioning fixture for gear machining according to claim 1, characterized in that: The arc-shaped clamp seat (50) is provided with a first rotation groove (55), the arc-shaped clamp seat (50) is provided with a first positioning groove (56) in the first rotation groove (55), the arc-shaped clamp seat (50) is slidably connected with a first positioning block (57) in the first positioning groove (56), the first arc-shaped seat (51) is fixedly mounted on the top of the first positioning block (57), the first arc-shaped seat (51) is provided with a second rotation groove (58), the first arc-shaped seat (51) is provided with a second positioning groove (59) in the second rotation groove (58), the first arc-shaped seat (51) is slidably connected with a second positioning block (53) in the second positioning groove (59), and the second arc-shaped seat (52) is mounted on the top of the second positioning block (53).

9. A positioning fixture for gear machining according to claim 6, characterized in that: The top of the positioning frame (20) is provided with a moving groove (27) that matches the size of the movable plate (25), and the movable plate (25) is slidably arranged in the moving groove (27). A control button (13) is fixedly mounted on the top of the box body (10) at an end away from the electric telescopic rod (63) by bolts, and a support plate (28) is arranged on the top of the arc-shaped side plate (60) to support the positioning frame (20).

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