A machine tool positioning tool for gear machining

Abstract

The application discloses a machine tool positioning tool for gear machining, which comprises a base, a sleeving and clamping mechanism is arranged outside the base, the sleeving and clamping mechanism comprises a ring, the rings are arranged equidistantly above the base, the interval between two adjacent rings is smaller than the thickness of the gear, a fixed column is fixedly connected to the outer surface of the ring, one end of the fixed column is fixedly connected to the outer surface of the base, a tooth block is arranged inside the ring, a grinding belt is sleeved to the outer surface of the tooth block, a through sliding groove is formed in the body of the grinding belt, a fixed block is movably connected to the inside of the sliding groove, and the outer surface of the fixed block is fixedly connected to the outer surface of the tooth block, relates to the gear machining technical field, and solves the problems that the actual outside clamping measures are unstable and the gear teeth are damaged when the existing gear machining positioning device is used, and the gear surface polishing effect is affected.

Description

Technical Field

[0001] This invention relates to the field of gear processing technology, specifically to a machine tool positioning fixture for gear processing. Background Technology

[0002] During gear processing, burrs and protrusions may appear on the surface, requiring fine grinding. Typically, this is done manually by holding a tool to hold the gear in place before grinding, which can easily affect the grinding effect and precision. Invention patent CN120155614A discloses a gear processing positioning device, including a base with a placement platform fixedly mounted on its surface. Both the base and the placement platform have through grooves inside, and a spreading mechanism is slidably connected inside the through grooves; this increases the friction with the inner wall of the gear, further improving the gear's fixing effect.

[0003] Although this device has the advantages mentioned above, it still has the following drawbacks in practical use: 1) When the device is in use, the double clamping measure is driven by the same drive source. However, the inner and outer diameters of gears of different specifications are different, which leads to unstable clamping effect and low efficiency when double clamping. 2) In the external clamping measures, the included angle between two adjacent clamping blocks is fixed. However, the number of teeth of gears of different specifications is different, which leads to the problem that the external clamping cannot stably clamp the gear, or even damage the teeth. 3) When double clamping is used, the first fixing block protrudes outward, and the clamping block engages with the teeth, which can easily affect the grinding efficiency of the gear surface.

[0004] Therefore, it is necessary to address the existing problems with existing gear machining positioning devices. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a machine tool positioning fixture for gear processing, which solves the problem that when using existing gear processing positioning devices, the different inner and outer diameters and number of teeth of gears of different specifications lead to unstable clamping or damage to the teeth, and also affect the grinding effect of the gear surface.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a positioning fixture for a gear machining machine tool, comprising a base, a clamping mechanism provided on the outside of the base, the clamping mechanism comprising rings, the rings being equidistantly arranged above the base, with the distance between two adjacent rings being less than the thickness of the gear, a fixed post fixedly connected to the outer surface of the rings, one end of the fixed post being fixedly connected to the outer surface of the base, a tooth block being provided inside the rings, a grinding belt being fitted on the outer surface of the tooth block, a through groove being provided on the body of the grinding belt, a fixed block being movably connected inside the groove, the outer surface of the fixed block being fixedly connected to the outer surface of the tooth block, an annular groove being provided in the inner ring of the rings, an arc strip being movably connected inside the annular groove, a stop strip being fixedly connected to the outer surface of the arc strip, and the outer surface of the stop strip being movably connected to the inside of the annular groove.

[0007] Preferably, the outer surface of the abutment bar is provided with a groove, an adjusting gear is rotatably connected inside the groove, an adjusting motor is fixedly connected to the outer surface of the adjusting gear, the outer surface of the adjusting motor is fixedly connected to the inside of the annular groove, and a rack and a light strip are movably connected to the outer arc surface of the adjusting gear, and the outer surfaces of the adjusting rack and the light strip are fixedly connected to the two sides inside the groove, respectively.

[0008] Preferably, the toothed block is provided with a connecting component on its exterior. The connecting component includes a connecting groove, which is formed on the outer surface of the toothed block. A connecting block is slidably connected inside the connecting groove. The outer surface of the grinding belt is movably connected to the outer surface of the connecting block and the interior of the connecting groove, respectively. One side of the outer surface of the connecting block is arc-shaped and movably connected to the inner ring of the ring. One side of the outer surface of the connecting block is fixedly connected to the outer surface of the arc strip. Both the connecting block and the toothed block have slots on their outer surfaces. The interiors of the two slots are connected. A locking block is slidably connected inside the inner slot. The outer surface of the locking block engages with the interior of the outer slot.

[0009] Preferably, a spring rod is fixedly connected to the outer surface of the card block, one end of the spring rod is fixedly connected to the inside of the inner card groove, the outer surface of the card block is provided with a chamfer, the outer surface of the chamfer abuts against a corner strip, and the outer surface of the corner strip is fixedly connected to the inside of the outer card groove.

[0010] Preferably, the toothed block is provided with a pushing component on its exterior. The pushing component includes a slide rail, which is fixedly disposed on both sides of the outer surface of the base. A slider is slidably connected to the outer surface of the slide rail, and a fixed rod is fixedly connected to the outer surface of the slider. A support bar is provided on the exterior of one end of the fixed rod, and the support bar is L-shaped.

[0011] Preferably, one end of the fixed rod is fixedly connected to an electric push rod, the output end of the electric push rod is fixedly connected to a rotary cylinder, the output end of the rotary cylinder is fixedly connected to the outer surface of the support bar, the output end of the electric push rod is fixedly connected to a support plate, and the outer surface of the support plate is rotatably connected to a telescopic rod.

[0012] Preferably, a grinding unit is provided on the outside of one end of the fixed rod. The grinding unit includes a grinding strip. The outer surface of the grinding strip is movably connected to the outer surface of the support. The output end of the telescopic rod is rotatably connected to the outer surface of the grinding strip. A sliding rod is embedded in the outer surface of the grinding strip and threadedly connected. One end of the sliding rod is slidably connected to the body of the support and extends to the outside of the support. A clamping plate is fixedly connected to one end of the sliding rod.

[0013] Preferably, a compression spring is sleeved on the outside of the slide rod, and the two ends of the compression spring are fixedly connected to the outer surfaces of the card plate and the support bar, respectively. A magnetic ring is sleeved on the outside of the slide rod, and the outer surface of the magnetic ring is embedded and fixedly connected to the outer surface of the support bar. An electromagnet is movably connected to the outside of the magnetic ring by magnetic force, and the outer surface of the electromagnet is fixedly connected to the outer surface of the card plate.

[0014] Beneficial effects This invention provides a machine tool positioning fixture for gear machining. Compared with the prior art, it has the following advantages: (1) By setting up a clamping mechanism, the adjusting motor drives the adjusting gear to rotate, and then the meshing of the adjusting gear and the rack causes the abutment to drive the tooth block to rotate along the axis of the ring through the arc strip, thereby adapting to the tooth gap of the gear to be ground. Then, through the tooth blocks on multiple rings that are equidistantly arranged, all tooth gaps of the gear to be ground can be fully covered. Since the grinding belt is sleeved on the outer surface of the tooth block, when the tooth block enters the tooth gap, the grinding belt can fit with the two adjacent teeth. When the gear to be ground moves along the axial direction of the ring, the grinding effect on the teeth can be achieved, thereby avoiding the problems of affecting the grinding efficiency and unstable clamping.

[0015] (2) By setting up connecting components and using the modular setting of connecting blocks and connecting slots, when clamping gears of different specifications, the tooth blocks of appropriate size can be replaced to better clamp the size to be polished. At the same time, the spring rod is used to achieve the sliding of the block inside the slots on both sides, which facilitates the quick disassembly and assembly of the tooth blocks. Furthermore, the block is subject to the abutment and limiting effect through the chamfer and the corner strip, which prevents the block from sliding out through the outer slot and causing the connection between the connecting block and the tooth block to be unstable. This ensures the stability of the grinding belt and improves the polishing effect and precision.

[0016] (3) By setting the push component, the slider moves along the slide rail, which causes the fixed rod to drive the electric push rod, the rotary cylinder and the support to move and approach the gear sleeved in the ring. The support abuts the gear to be ground, which not only improves its stability, but also pushes it to slide axially along the ring, so that it can be ground by the grinding belt, thus achieving the dual effect of clamping and grinding the gear to be ground.

[0017] (4) By setting up a grinding unit, the grinding strip is connected to the support strip through the slide bar, so that the grinding strip can slide along the radial direction of the ring to adapt to the contact action of surfaces of different specifications and sizes. The radial position of the grinding strip can be precisely controlled by the centrifugal force of the rotating output end of the rotary cylinder, the elastic force of the compression spring, and the magnetic force of the magnetic ring and electromagnet. At the same time, by setting grinding grooves on one side of the grinding strip, the outer surfaces on both sides of the gear can be ground by the radial sliding of the grinding strip and the rotation driven by the rotary cylinder, thus achieving the dual effect of clamping and grinding the gear to be ground. Attached Figure Description

[0018] Figure 1 This is a perspective view of the external structure of the present invention; Figure 2 This is a perspective view of the external structure of the connecting block of the present invention; Figure 3 This is a three-dimensional view of the internal structure of the tooth block of the present invention; Figure 4 This is a perspective view of the external structure of the support bar of the present invention; Figure 5 This is a perspective view of the external structure of the slide bar of the present invention.

[0019] In the diagram: 1. Base; 2. Ring; 3. Fixed column; 4. Toothed block; 5. Connecting assembly; 51. Connecting groove; 52. Connecting block; 53. Slot; 54. Slot; 55. Spring rod; 56. Angle bar; 6. Pushing assembly; 61. Slide rail; 62. Slider; 63. Fixed rod; 64. Grinding unit; 641. Grinding strip; 642. Slide rod; 643. Clamping plate; 644. Compression spring; 645. Magnetic ring; 646. Electromagnet; 65. Support bar; 66. Electric push rod; 67. Rotary cylinder; 68. Support plate; 69. Telescopic rod; 7. Grinding belt; 8. Slide groove; 9. Fixed block; 10. Ring groove; 11. Arc bar; 12. Abutment bar; 13. Groove; 14. Adjusting gear; 15. Adjusting motor; 16. Toothed rack; 17. Grinding bar. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Please see Figure 1-5 This invention provides a technical solution: a machine tool positioning fixture for gear processing. The system includes a base 1, with a clamping mechanism on its exterior. The clamping mechanism includes rings 2, the inner diameter of which is larger than the outer diameter of the gear to be ground. The rings 2 are equidistantly arranged above the base 1, with the distance between adjacent rings 2 less than the thickness of the gear. A fixed post 3 is fixedly connected to the outer surface of the rings 2, providing support. One end of the fixed post 3 is fixedly connected to the outer surface of the base 1. A toothed block 4 is provided inside the rings 2. The external dimensions of the toothed block 4 are adapted to the tooth clearance of the gear to be ground, and its width is the same as the width of the ring 2. Corresponding dimensions are provided for different gear specifications. A grinding belt 7 is fitted onto the outer surface of the toothed block 4, with its grinding surface facing the teeth of the gear to be ground. When the gear slides axially, it can grind two adjacent teeth. The grinding belt 7 has openings in its body... A through groove 8 is provided, and a fixed block 9 is movably connected inside the groove 8. The outer width of the fixed block 9 is adapted to the inner width of the groove 8, and the inner length of the groove 8 is greater than the outer length of the fixed block 9. Through the connection between the fixed block 9 and the groove 8, the grinding belt 7 can be axially limited. At the same time, the sliding of the fixed block 9 inside the groove 8 can facilitate the tension of the grinding belt 7, thereby improving the grinding stability and accuracy. The outer surface of the fixed block 9 is fixedly connected to the outer surface of the tooth block 4. The inner ring of the ring 2 is provided with an annular groove 10. The cross-section of the annular groove 10 is T-shaped. An arc strip 11 is movably connected inside the annular groove 10. The arc strip 11 plays a connecting and guiding role. A stop strip 12 is fixedly connected to the outer surface of the arc strip 11. The stop strip 12 plays a stop and limit role, thereby improving the radial stability of the tooth block 4. The outer surface of the stop strip 12 is movably connected to the inside of the annular groove 10.

[0022] The outer surface of the abutment bar 12 has a groove 13. An adjusting gear 14 is rotatably connected inside the groove 13. The adjusting gear 14 achieves a limiting function by abutting against the inner walls on both sides of the groove 13 to avoid the problem of disengagement. An adjusting motor 15 is fixedly connected to the outer surface of the adjusting gear 14. The adjusting motor 15 is made of servo motor and is electrically connected to an external control circuit. The outer surface of the adjusting motor 15 is fixedly connected to the inside of the annular groove 10. A rack 16 and a light strip 17 are movably connected to the outer arc surface of the adjusting gear 14. The rack 16 can drive the abutment bar 12 to move the tooth block 4 by meshing with the adjusting gear 14. The surface of the light strip 17 is smoothly set. By contacting the surface of the adjusting gear 14, it can improve the force balance. The outer surfaces of the rack 16 and the light strip 17 are fixedly connected to the two sides inside the groove 13, respectively.

[0023] A connecting component 5 is provided on the outside of the tooth block 4. The connecting component 5 includes a connecting groove 51, which is formed on the outer surface of the tooth block 4. A connecting block 52 is slidably connected inside the connecting groove 51. The dimensions of the connecting groove 51 and the connecting block 52 are fixed. The connecting groove 51 is formed at the center position on the surface of the tooth block 4 of different specifications. The different specifications of the tooth block 4 refer to the different radial lengths and corresponding side inclination angles, so as to adapt to the tooth gaps of the gears to be ground of different specifications. The outer surface of the grinding belt 7 is movably connected to the outer surface of the connecting block 52 and the inside of the connecting groove 51. One side of the outer surface of the connecting block 52 is arc-shaped. It is movably connected to the inner ring of the ring 2. One side of the outer surface of the connecting block 52 is fixedly connected to the outer surface of the arc strip 11. The outer surfaces of the connecting block 52 and the tooth block 4 are both provided with slots 53. The interiors of the two slots 53 are connected. The interior of the inner slot 53 is slidably connected with a block 54. The dimensions of the slots 53 and the block 54 are fixed, and the cross-sectional dimensions of the block 54 are adapted to the cross-sectional dimensions of the slot 53. At the same time, the block 54 is made of a pressure-resistant, wear-resistant and corrosion-resistant material so as to stably engage with the outer slot 53. The outer surface of the block 54 engages with the interior of the outer slot 53.

[0024] A spring rod 55 is fixedly connected to the outer surface of the locking block 54. The spring rod 55 is made of fatigue-resistant material and controls the relative position of the locking block 54 through elastic extension and contraction, so as to facilitate the disassembly and replacement of the toothed block 4. One end of the spring rod 55 is fixedly connected to the inside of the inner locking groove 53. The outer surface of the locking block 54 is chamfered, and the outer surface of the chamfered abuts against the corner strip 56. The corner strip 56 and the chamfer on the locking block 54 abut against each other, which can limit the locking block 54 and avoid completely blocking the outer locking groove 53. This makes it easy to push the locking block 54 into the inner locking groove 53 through the outer locking groove 53 to realize the disassembly of the toothed block 4. The outer surface of the corner strip 56 is fixedly connected to the inside of the outer locking groove 53.

[0025] The toothed block 4 is provided with a pushing component 6. The pushing component 6 includes a slide rail 61, which is fixedly installed on both sides of the outer surface of the base 1. A slider 62 is slidably connected to the outer surface of the slide rail 61. The slider 62 and the slide rail 61 are made of existing linear motor devices, electrically connected to the external control circuit, and have a self-locking function. A fixing rod 63 is fixedly connected to the outer surface of the slider 62. The fixing rod 63 plays a connecting and fixing role. A support bar 65 is provided on the outer side of one end of the fixing rod 63. The support bar 65 plays a supporting role in the gear to be ground. The support bar 65 is L-shaped.

[0026] An electric push rod 66 is fixedly connected to one end of the fixed rod 63. The electric push rod 66 is electrically connected to an external control circuit. By extending or retracting its output end, it can push the gear to be ground to slide along the axis of the ring 2. A rotary cylinder 67 is fixedly connected to the output end of the electric push rod 66. The rotary cylinder 67 is connected to an external control circuit. The output end of the rotary cylinder 67 is fixedly connected to the outer surface of the support bar 65. A support plate 68 is fixedly connected through the output end of the electric push rod 66. The support plate 68 plays a supporting role. A telescopic rod 69 is rotatably connected to the outer surface of the support plate 68. The support range can be adjusted by extending or retracting the output end of the telescopic rod 69.

[0027] A grinding unit 64 is provided on the outside of one end of the fixed rod 63. The grinding unit 64 includes a grinding strip 641. The surface of the grinding strip 641 near the ring 2 is provided with grinding patterns, which can grind both sides of the gear to be ground. The outer surface of the grinding strip 641 is movably connected to the outer surface of the support 65. The output end of the telescopic rod 69 is rotatably connected to the outer surface of the grinding strip 641. A sliding rod 642 is embedded in the outer surface of the grinding strip 641 and threadedly connected. The sliding rod 642 plays a sliding guide and connection limiting role. One end of the sliding rod 642 is slidably connected to the body of the support 65 and extends to the outside of the support 65. A clamping plate 643 is fixedly connected to one end of the sliding rod 642. The clamping plate 643 plays a limiting role in the radial sliding of the grinding strip 641.

[0028] A compression spring 644 is fitted around the slide rod 642. The compression spring 644 is made of fatigue-resistant material and its elasticity facilitates the reset function of the grinding strip 641 after movement. The two ends of the compression spring 644 are fixedly connected to the outer surfaces of the clamping plate 643 and the support bar 65, respectively. A magnetic ring 645 is fitted around the slide rod 642. The magnetic ring 645 is made of permanent magnet and has strong magnetism. The outer surface of the magnetic ring 645 is embedded and fixedly connected to the outer surface of the support bar 65. An electromagnet 646 is movably connected to the outside of the magnetic ring 645 by magnetic force. The electromagnet 646 is electrically connected to the external control circuit. Through the magnetic force of the magnetic ring 645 and by counteracting the elasticity and centrifugal force of the compression spring 644, the clamping plate 643 can be controlled to drive the grinding strip 641 to adjust its position through the slide rod 642. The outer surface of the electromagnet 646 is fixedly connected to the outer surface of the clamping plate 643.

[0029] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0030] This fixture, with its core components being the clamping mechanism, connecting assembly 5, pushing assembly 6, and grinding unit 64 working in tandem, completes gear positioning and processing according to the orderly process of adjusting and installing the gear block 4 → positioning the gear by fitting it together → clamping it on both sides → grinding the tooth gap → grinding the gear end face. Each component is interlocked and operates in a coordinated manner, achieving stable clamping and efficient grinding of gears of different specifications. First, the toothed block 4 is adjusted and installed. The connecting component 5 facilitates the quick connection between the toothed block 4 and the inner arc strip 11 of the ring 2. The toothed block 4 is pushed into the connecting groove 51 along the connecting block 52. The spring rod 55 in the inner slot 53 pushes the locking block 54 outward, precisely engaging with the outer slot 53. The chamfer of the locking block 54 abuts against the corner strip 56, thus limiting and fixing the toothed block 4 to prevent loosening or falling off during processing. Then, the adjusting motor 15 is started, driving the adjusting gear. 14. Rotate to adjust the gear 14 and the rack 16 to mesh and drive the abutment 12 to move along the annular groove 10 of the ring 2. The abutment 12 drives the tooth block 4 to rotate around the axis of the ring 2 through the arc strip 11, precisely adjusting the angle of the tooth block 4 so that it is perfectly matched with the tooth gap of the gear to be ground. At the same time, the grinding belt 7 on the outside of the tooth block 4 is positioned synchronously with the tooth block 4. The fixing block 9 is inserted into the sliding groove 8 of the grinding belt 7, which not only restricts the axial displacement of the grinding belt 7, but also ensures that it can be appropriately tensioned, in preparation for subsequent grinding. After the tooth block 4 is adjusted and installed, the gear to be ground is fitted inside the ring 2. Since the rings 2 are equidistantly arranged above the base 1 and the distance between adjacent rings 2 is less than the thickness of the gear, the gear can be smoothly fitted into multiple rings 2. After fitting, the tooth block 4 is embedded in the tooth gap of the gear. The grinding belt 7 is in close contact with the surface of the adjacent teeth of the gear, realizing the initial positioning of the outer side of the gear, avoiding damage to the teeth during the clamping process. At the same time, it is compatible with gear specifications with different inner and outer diameters and number of teeth, solving the problem of unstable clamping of traditional tooling. After the gear is in place, the push assembly 6 is activated, and the support bar 65 and the grinding bar 641 complete the clamping of the gear on both sides. The sliders 62 on both sides of the base 1 slide along the slide rail 61 towards the gear. The sliders 62 drive the fixed rod 63 to move synchronously, so that the support bar 65 and the grinding bar 641 at the end of the fixed rod 63 are close to the gear. At this time, the clamping and grinding unit 64 cooperates to operate. The electromagnet 646 is energized to generate magnetic force, which interacts with the magnetic ring 645. With the elastic force of the compression spring 644, the clamping plate 643 and the slide rod 642 slide along the support bar 65, adjusting the radial position of the grinding bar 641 so that it fits the end face of the gear. The telescopic rod 69 extends and retracts synchronously to assist in supporting the grinding bar 641 and ensure that the clamping force is uniform. The support bar 65 and the grinding bar 641 are stably clamped from both sides of the gear, completing the final positioning and clamping of the gear, ensuring that the gear does not deviate or shake during the processing. After the gear is clamped and fixed, the output ends of the electric push rods 66 on both sides extend and retract, driving the gear to complete the tooth gap grinding. The output ends of the electric push rods 66 slowly extend and push the gear to move slowly along the axial direction of the ring 2 through the rotating cylinder 67 and the support 65. When the gear moves axially, the teeth and the grinding belt 7 on the outer side of the tooth block 4 continuously rub against each other. The grinding belt 7 grinds the inner and outer surfaces of the gear teeth evenly, removing burrs and protrusions at the teeth. The grinding belts 7 on multiple equidistant rings 2 work synchronously to achieve one-time grinding of all the teeth of the gear, ensuring grinding accuracy and efficiency. After the tooth gap grinding is completed, the rotary cylinder 67 is activated, driving the grinding strip 641 to rotate and complete the grinding of both sides of the gear. The output end of the rotary cylinder 67 drives the support bar 65 and the grinding strip 641 to rotate at high speed. The grinding texture on the surface of the grinding strip 641 continuously contacts and rubs against the end faces of both sides of the gear, finely grinding the burrs and protrusions on the end faces of the gear. At the same time, the electric push rod 66 can extend and retract slightly, cooperating with the rotation of the grinding strip 641 to achieve full-range grinding of the gear end face. Through the triple cooperation of centrifugal force, the elasticity of the compression spring 644 and the magnetic force, the radial position of the grinding strip 641 is finely adjusted in real time to adapt to the end face size of gears of different specifications, ensuring uniform grinding effect. After all the grinding processes are completed, the electric push rod 66 retracts, the rotary cylinder 67 stops operating, the slider 62 returns to its original position along the slide rail 61, and the grinding strip 641 disengages from the gear and the support strip 65. The ground gear can then be removed from the ring 2, completing one gear positioning processing cycle.

[0031] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A machine tool positioning fixture for gear processing, comprising a base (1), characterized in that: The base (1) is provided with a clamping mechanism on its outside. The clamping mechanism includes a ring (2). The rings (2) are arranged at equal intervals above the base (1), and the distance between two adjacent rings (2) is less than the thickness of the gear. A fixed column (3) is fixedly connected to the outer surface of the ring (2). One end of the fixed column (3) is fixedly connected to the outer surface of the base (1). A tooth block (4) is provided inside the ring (2). A grinding belt (7) is sleeved on the outer surface of the tooth block (4). A through groove (8) is opened on the body of the grinding belt (7). A fixed block (9) is movably connected inside the groove (8). The outer surface of the fixed block (9) is fixedly connected to the outer surface of the tooth block (4). An annular groove (10) is opened in the inner ring of the ring (2). An arc strip (11) is movably connected inside the annular groove (10). A stop strip (12) is fixedly connected to the outer surface of the arc strip (11). The outer surface of the stop strip (12) is movably connected to the inside of the annular groove (10).

2. The positioning fixture for gear machining according to claim 1, characterized in that: The outer surface of the abutment bar (12) is provided with a groove (13), and an adjusting gear (14) is rotatably connected inside the groove (13). An adjusting motor (15) is fixedly connected to the outer surface of the adjusting gear (14). The outer surface of the adjusting motor (15) is fixedly connected to the inside of the annular groove (10). A rack (16) and a light strip (17) are movably connected to the outer arc surface of the adjusting gear (14). The outer surfaces of the rack (16) and the light strip (17) are fixedly connected to the two sides inside the groove (13).

3. The positioning fixture for gear machining according to claim 1, characterized in that: The tooth block (4) is provided with a connecting component (5) on its exterior. The connecting component (5) includes a connecting groove (51). The connecting groove (51) is opened on the outer surface of the tooth block (4). A connecting block (52) is slidably connected inside the connecting groove (51). The outer surface of the grinding belt (7) is movably connected to the outer surface of the connecting block (52) and the interior of the connecting groove (51). One side of the outer surface of the connecting block (52) is arc-shaped and movably connected to the inner ring (2). One side of the outer surface of the connecting block (52) is fixedly connected to the outer surface of the arc strip (11). The outer surfaces of the connecting block (52) and the tooth block (4) are both provided with slots (53). The interiors of the slots (53) on both sides are connected. A slot (54) is slidably connected inside the inner slot (53). The outer surface of the slot (54) is engaged with the interior of the outer slot (53).

4. The machine tool positioning fixture for gear processing according to claim 3, characterized in that: A spring rod (55) is fixedly connected to the outer surface of the card block (54). One end of the spring rod (55) is fixedly connected to the inside of the inner card groove (53). The outer surface of the card block (54) is provided with a chamfer. The outer surface of the chamfer abuts against a corner strip (56). The outer surface of the corner strip (56) is fixedly connected to the inside of the outer card groove (53).

5. The positioning fixture for gear machining according to claim 1, characterized in that: The toothed block (4) is provided with a pushing component (6) on its outside. The pushing component (6) includes a slide rail (61). The slide rail (61) is fixedly disposed on both sides of the outer surface of the base (1). A slider (62) is slidably connected to the outer surface of the slide rail (61). A fixed rod (63) is fixedly connected to the outer surface of the slider (62). A support bar (65) is provided on the outside of one end of the fixed rod (63). The support bar (65) is L-shaped.

6. The positioning fixture for gear machining according to claim 5, characterized in that: One end of the fixed rod (63) is fixedly connected to an electric push rod (66), the output end of the electric push rod (66) is fixedly connected to a rotary cylinder (67), the output end of the rotary cylinder (67) is fixedly connected to the outer surface of the support bar (65), the output end of the electric push rod (66) is fixedly connected to a support plate (68), and the outer surface of the support plate (68) is rotatably connected to a telescopic rod (69).

7. A machine tool positioning fixture for gear processing according to claim 5, characterized in that: A grinding unit (64) is provided on the outside of one end of the fixed rod (63). The grinding unit (64) includes a grinding strip (641). The outer surface of the grinding strip (641) is movably connected to the outer surface of the support (65). The output end of the telescopic rod (69) is rotatably connected to the outer surface of the grinding strip (641). A sliding rod (642) is embedded in the outer surface of the grinding strip (641) and threadedly connected. One end of the sliding rod (642) is slidably connected to the body of the support (65) and extends to the outside of the support (65). A clamping plate (643) is fixedly connected to one end of the sliding rod (642).

8. A machine tool positioning fixture for gear processing according to claim 7, characterized in that: A compression spring (644) is sleeved on the outside of the slide rod (642). The two ends of the compression spring (644) are fixedly connected to the outer surfaces of the clamping plate (643) and the support bar (65), respectively. A magnetic ring (645) is sleeved on the outside of the slide rod (642). The outer surface of the magnetic ring (645) is embedded and fixedly connected to the outer surface of the support bar (65). An electromagnet (646) is movably connected to the outside of the magnetic ring (645) by magnetic force. The outer surface of the electromagnet (646) is fixedly connected to the outer surface of the clamping plate (643).

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