A large modulus segment gear pitch circle detection adjusting device

Abstract

This application provides a device for detecting and adjusting the pitch circle of a large-module segmented gear, belonging to the field of gear testing technology. It includes a guide flange, a support arm, a dial indicator, and a measuring rod. The segmented gear is initially fixed to the guide flange using multiple fixing bolts. A centering plate is installed at the left end of the support arm. When both fulcrums of the centering plate are in contact with the outer arc surface of the guide flange, the axis of the support arm is collinear with the radial direction of the guide flange. A fixing frame is installed at the right end of the support arm, and a dial indicator is mounted on the fixing frame. The measuring rod can be placed inside the tooth groove of the segmented gear, and the probe of the dial indicator can contact the cylindrical surface of the measuring rod. This application can complete the pitch circle detection and adjustment at the initial stage of gear installation, eliminating the need for detection after the gear is fully fixed, avoiding repeated disassembly and assembly due to insufficient accuracy. Furthermore, it is adaptable to large-module segmented gears of different sizes and specifications, meeting the measurement needs of different scenarios.

Description

Technical Field

[0001] This application relates to the field of gear testing technology, specifically to a device for detecting and adjusting the pitch circle of a large module segmented gear. Background Technology

[0002] Large-module segmented gears are core transmission components in large mechanical equipment such as wind turbine generators, mining crushers, and large machine tools. Their transmission accuracy directly determines the operational stability, transmission efficiency, and service life of the equipment. Because they are designed to meet the power transmission needs of large equipment, these gears are generally characterized by large single-segment weight and overall size. Furthermore, their installation often involves complex environments such as outdoor wind turbine towers and underground mines, making their installation and positioning significantly more difficult than conventional gears. The segmented design of their structure also places stringent requirements on the overall accuracy of the assembled segments.

[0003] Pitch circle accuracy, as a core indicator for evaluating the performance of large-module segmented gear transmissions, directly affects the meshing effect after the gear segments are assembled. Therefore, pitch circle accuracy testing and position adjustment must be performed simultaneously during installation. Deviations in the pitch circle will lead to uneven gear meshing clearance, which in turn will exacerbate local tooth surface wear. Long-term operation may also cause equipment vibration, excessive noise, and other malfunctions. In severe cases, it may even cause transmission system failure, affecting the safe and stable operation of the entire large equipment. Therefore, pitch circle testing is a crucial step in ensuring the installation quality of large-module segmented gears.

[0004] Referring to the Chinese patent document CN215003308U, published on December 3, 2021, entitled "Gear Pitch Runout Detection Device," the device includes a base plate, a mounting base connected to the base plate, and a detection base. The mounting base has a spindle mounted on it via a bearing seat. A worktable is mounted on the spindle, and a disc-shaped expansion sleeve is fitted over the spindle above the worktable. A nut is threaded onto the upper end of the spindle, and a pressure sleeve is provided outside the spindle between the nut and the disc-shaped expansion sleeve. The detection base is connected to a detection platform. The middle part of a lever is mounted on the detection platform via a hinge. A detection ball head is fixed at one end of the lever, and a contact is fixed at the other end of the lever. The detection ball head and the contact are equidistantly located on both sides of the center of the hinge. A dial indicator that mates with the contact is fixed on the detection platform.

[0005] The above technical solution is convenient to operate and read, and can improve the efficiency and accuracy of testing. However, when applied to the pitch circle testing and adjustment of large module segmented gears, the segmented gears must be completely fixed and installed before pitch circle testing. Before testing, the gear and guide rail flange must be securely connected. If the pitch circle accuracy is found to be substandard, the connection structure between the gear and guide rail flange must be disassembled and the installation position readjusted. The repeated disassembly and assembly process is not only time-consuming and labor-intensive, significantly reducing installation efficiency, but may also cause secondary damage to the gear tooth surface or guide rail flange connection surface due to hoisting and positioning deviations during disassembly and assembly. It is difficult to meet the actual needs of large module segmented gear installation scenarios. Summary of the Invention

[0006] In view of this, this application provides a pitch circle detection and adjustment device for large module segmented gears, which can complete the pitch circle detection and adjustment in the early stage of gear installation, without having to detect it after the gear is completely fixed and installed, thus avoiding repeated disassembly and assembly due to substandard accuracy. It can also be adapted to large module segmented gears of different sizes and specifications to meet the measurement needs of different scenarios.

[0007] To solve the above-mentioned technical problems, this application provides a device for detecting and adjusting the pitch circle of a large-module segmented gear, including a guide flange, a support arm, a dial indicator, and a measuring rod. The segmented gear is initially fixed on the guide flange by multiple fixing bolts. A centering plate is installed at the left end of the support arm. When both fulcrums of the centering plate are in contact with the outer arc surface of the guide flange, the axis of the support arm is collinear with the radial direction of the guide flange. A fixing frame is installed at the right end of the support arm, and a dial indicator is installed on the fixing frame. The measuring rod can be placed in the tooth groove of the segmented gear, and the probe of the dial indicator can contact the cylindrical surface of the measuring rod.

[0008] By adopting the above technical solution, the segmented gear is fixed to the guide rail flange with fixing bolts. The positioning method, where the two fulcrums of the centering angle plate contact the outer arc surface of the guide rail flange, ensures that the axis of the support arm points to the center of the arc, guaranteeing a unified testing benchmark. A measuring rod adapted to the gear module is placed in the tooth groove, so that the dial indicator probe contacts the cylindrical surface of the measuring rod. Moving the support arm drives the dial indicator to sequentially test the position of the measuring rod at different tooth grooves, recording the readings at each position, and comparing the difference between the maximum and minimum values. This difference is then compared with the design-allowed pitch circle runout tolerance to determine whether the pitch circle runout meets the requirements. This process can be completed in the early stages of gear installation, allowing direct adjustment of the gear installation position based on the test results. This avoids repeated disassembly and assembly due to insufficient accuracy during later testing, significantly saving installation and adjustment time. Simultaneously, a unified testing benchmark effectively improves installation accuracy.

[0009] Optionally, the support arm includes a long arm and a short arm. The right end of the long arm has multiple mounting holes arranged in a linear array along its own axis. The short arm has two fastening screws threadedly connected to it. The fastening screws are respectively inserted into the mounting holes. The left end of the long arm is equipped with a centering plate. The fixing bracket is installed on the right end of the short arm.

[0010] By adopting the above technical solution, according to the dimensions of the guide rail flange and the segmented gear, the corresponding mounting holes on the long arm are selected, and the fastening screws of the short arm are inserted into the selected mounting holes and tightened to fix the long arm and the short arm. The relative positions of the two can be adjusted to adapt to workpieces of different sizes. The length of the support arm can be flexibly adjusted, expanding the adaptability of the device to large-module segmented gears of different specifications and improving the versatility of the device.

[0011] Optionally, the centering plate includes an inverted plate, a worm gear, worm wheels, and support legs. The inverted plate is fixedly installed on the left end of the long arm. The left end of the worm gear is rotatably connected to a pre-set through hole on the left side of the inverted plate. There are two worm wheels, both rotatably mounted between the upper and lower plates of the inverted plate via pins. The worm gear meshes with the two worm wheels respectively. Support legs are fixedly mounted on each worm wheel. When the worm gear rotates, it can drive the two worm wheels to drive the two support legs to rotate synchronously in opposite directions, so that the two support legs are fitted with the outer arc surface of the guide rail flange.

[0012] By adopting the above technical solution, the worm gear is rotated, which drives two meshing worm wheels to rotate synchronously in opposite directions. The worm wheels drive the support legs to rotate, and the included angle between the two support legs is adjusted so that the support legs fit and contact the outer arc surface of the guide rail flange. This ensures that the centering plate is stably fitted with guide rail flanges of different radii, and ensures that the axis of the support arm is always collinear with the radial direction of the guide rail flange, thereby improving the positioning accuracy.

[0013] Optionally, a connecting shaft is fixedly provided at the right end of each of the legs, and a small bearing is fixedly provided on each of the connecting shafts, with the outer arc surface of the small bearing abutting against the outer arc surface of the guide rail flange.

[0014] By adopting the above technical solution, the outrigger drives the small bearing to contact the outer arc surface of the guide rail flange through the connecting shaft. When the centering plate is moved, the small bearing rolls along the outer arc surface of the guide rail flange. On the one hand, this can reduce the frictional resistance during the movement of the centering plate, making the device move more flexibly and facilitating the rapid detection of different tooth grooves. On the other hand, the rolling contact can also reduce the wear between the fulcrum and the outer arc surface of the guide rail flange.

[0015] Optionally, a mounting rod is vertically provided on the long arm, and a sleeve is rotatably provided on the mounting rod. The sleeve can roll into contact with the arc surface inside the arc groove opened at the left end of the guide rail flange.

[0016] By adopting the above technical solution, the sleeve is embedded in the arc-shaped groove at the left end of the guide flange, and cooperates with the small bearing on the centering plate to form a bidirectional limit from the inside and outside of the guide flange. This effectively restricts the offset of the centering plate in the left and right directions, ensuring that the axis of the support arm is always collinear with the radial direction of the guide flange. This avoids reading errors caused by device offset during the testing process, and further improves the stability of the testing process and the accuracy of the testing results.

[0017] Optionally, the mounting rod has an L-shaped structure. The vertical part of the mounting rod is vertically slidably connected to the inside of the long arm. A cover plate is threaded to the top of the vertical part of the mounting rod. A spring is sleeved on the upper end of the vertical part of the mounting rod. The two ends of the spring abut against the lower surface of the cover plate and the upper surface of the long arm, respectively. A second sleeve is rotatably provided on the horizontal part of the mounting rod. The outer arc surface of the second sleeve abuts against the lower surface of the guide rail flange.

[0018] By adopting the above technical solution, the elastic force of the spring is used to apply a downward force to the mounting rod through the cover plate, pushing the sleeve two into close contact with the lower surface of the guide flange. With the support of the long arm on the upper surface of the guide flange, the guide flange is clamped and limited from the top and bottom, effectively restricting the shaking of the centering angle plate in the top and bottom direction, avoiding vertical deviation of the support arm, further improving the stability of the detection benchmark, and ensuring measurement accuracy.

[0019] Optionally, the vertical part of the mounting rod can rotate around its own axis, and a limiting plate is fixedly provided on the vertical part of the mounting rod. The limiting plate has four positioning holes evenly opened in the circumferential direction. A positioning pin is fixedly provided on the lower surface of the long arm, and the positioning pin is inserted into the vertically corresponding positioning hole.

[0020] By adopting the above technical solution, the direction of sleeve two is adjusted by rotating the mounting rod. After the adjustment is completed, the spring resets and drives the limiting plate to move upward, so that the positioning pin is inserted into the corresponding positioning hole of the limiting plate, fixing the rotation angle of the mounting rod; preventing the mounting rod from rotating arbitrarily and causing the contact state between sleeve two and the lower surface of the guide rail flange to change, ensuring the stability of the upper and lower limiting structure, and avoiding limiting failure.

[0021] Optionally, the fixing frame includes a slotted plate, a mounting block, and an adjusting component. The slotted plate is fixedly installed on the right end of the short arm. A T-shaped groove is formed inside the slotted plate. The mounting block is vertically slidably disposed on the inner wall of the T-shaped groove. The dial indicator is fixedly installed on the mounting block. An adjusting component is provided at the rear end of the slotted plate. The adjusting component is configured to cooperate with the mounting block.

[0022] By adopting the above technical solution, the mounting block is pushed to move vertically along the T-slot of the groove plate. The mounting block drives the dial indicator to move synchronously, adjusting the height of the dial indicator so that the dial indicator probe can be adapted to contact with measuring rods of different sizes. Then, the position of the mounting block is fixed by adjusting the component. This achieves flexible adjustment of the dial indicator height, adapting to measuring rods and toothed grooves of different sizes, and ensuring the stability of the contact between the dial indicator and the measuring rod.

[0023] Optionally, the adjustment assembly includes a mounting plate, a rotating column, and a locking stud. There are two mounting plates, which are respectively fixedly installed on the upper and lower ends of the rear side of the slot plate. The rotating column is rotatably disposed between the two mounting plates. The outer arc surface of the rotating column is provided with a spiral guide groove. A connecting column is fixedly disposed on the side wall of the mounting block. The rear end of the connecting column is in sliding contact with the inner wall of the guide groove. When the rotating column rotates, the spiral guide groove applies a vertical driving force through the connecting column, causing the mounting block to move vertically. The rotating column extends above the upper mounting plate. The side wall of the upper mounting plate is provided with a threaded hole. The locking stud is threadedly connected to the inside of the threaded hole and abuts against the outer arc surface of the rotating column.

[0024] By adopting the above technical solution, the locking stud is loosened, the rotating column is rotated, and the rotating column drives the connecting column to move vertically through the spiral guide groove. The connecting column drives the mounting block and dial indicator to move. After adjusting to a suitable height, the locking stud is tightened to press the rotating column and fix the position of the rotating column. This achieves accurate and continuous adjustment of the dial indicator height, and the adjustment is firmly fixed, avoiding reading errors caused by the position displacement of the dial indicator during the testing process.

[0025] Optionally, the front sidewall of the T-shaped groove is provided with a dovetail groove, and a dovetail slider is fixedly provided on the front side of the mounting block, the dovetail slider slidingly contacting the inner wall of the dovetail groove.

[0026] By adopting the above technical solution, when the mounting block moves, the dovetail slider slides along the dovetail groove on the front side wall of the T-groove, guiding and limiting the movement direction of the mounting block, preventing the mounting block from shifting laterally during movement; ensuring the stability of the vertical movement of the mounting block, further improving the accuracy of the dial indicator position adjustment, and reducing detection errors.

[0027] In summary, compared with the prior art, this application includes the following beneficial technical effects:

[0028] 1. Place the measuring rod in the tooth groove, so that the dial indicator probe contacts the cylindrical surface of the measuring rod. Move the support arm to drive the dial indicator to detect the position of the measuring rod at different tooth grooves in sequence. Record the readings at each position and compare the difference between the maximum and minimum values. Compare the difference with the allowable pitch circle runout tolerance in the design to determine whether the pitch circle runout meets the requirements. This process is completed in the early stage of gear installation. The gear installation position can be adjusted directly based on the test results, avoiding repeated disassembly and assembly due to substandard accuracy after later testing. This significantly saves installation and adjustment time. At the same time, a unified test benchmark can also effectively improve the installation accuracy.

[0029] 2. The small bearing and sleeve one work together to limit the support arm in the left and right directions. The sleeve two, driven by the spring of the mounting rod, clamps and limits the long arm vertically. The angle of the mounting rod is then fixed by the limiting plate and the positioning pin, forming a multi-directional three-dimensional limiting system. This effectively avoids the left and right deviation, up and down sway, and angle deflection of the device during the testing process. It ensures that the axis of the support arm is always collinear with the radial direction of the guide rail flange, and avoids the situation where the small bearing and the guide rail flange do not contact during the manual movement of the support arm. This ensures the accuracy of the test and facilitates quick switching of the testing tooth groove.

[0030] 3. The outriggers are driven to rotate synchronously in opposite directions via a worm gear structure, adjusting the fulcrum angle of the centering plate to accommodate guide rail flanges of different radii. The rotating column, through a spiral guide groove, drives the connecting column to move vertically. The connecting column then drives the mounting block and dial indicator to move. After adjusting to the appropriate height, the locking studs are tightened to secure the rotating column, fixing its position. This allows for precise and continuous adjustment of the dial indicator height, covering the inspection of various large-module segmented gears and reducing the cost for companies to configure dedicated inspection equipment for different workpieces. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of a large module segmented gear pitch circle detection and adjustment device according to this application;

[0032] Figure 2 This is a structural schematic diagram of the support arm, centering plate, fixing frame, and adjustment assembly of this application;

[0033] Figure 3 This is a top sectional view of the C-shaped plate of this application.

[0034] Figure 4 This is a structural schematic diagram of the mounting rod and locating pin in this application;

[0035] Figure 5 This is a structural schematic diagram of the mounting rod, limiting plate, and positioning hole of this application;

[0036] Figure 6 This is a schematic diagram of the rotating column structure in this application;

[0037] Figure 7 This is a top sectional view of the fixing frame and adjustment assembly of this application.

[0038] Explanation of reference numerals in the attached drawings: 1. Guide rail flange; 101. Arc groove; 2. Support arm; 21. Long arm; 211. Mounting hole; 22. Short arm; 23. Fastening screw; 3. Dial indicator; 4. Measuring rod; 5. Segmented gear; 6. Centering angle plate; 61. C-shaped plate; 62. Worm gear; 63. Worm wheel; 64. Support leg; 641. Connecting shaft; 642. Small bearing; 7. Fixing frame; 71. Groove plate; 711. T-groove; 712. Dovetail groove; 713. Dovetail slider; 72. Mounting block; 8. Adjustment assembly; 81. Mounting plate; 82. Rotating column; 821. Spiral guide groove; 83. Locking stud; 84. Connecting column; 9. Positioning pin; 10. Mounting rod; 11. Sleeve one; 12. Cover plate; 13. Spring; 14. Sleeve two; 15. Limiting plate; 16. Positioning hole. Detailed Implementation

[0039] The following will be described in conjunction with embodiments of this application. Figures 1-7The technical solutions of the embodiments of this application are clearly and completely described herein. Obviously, the described embodiments are only a part of the embodiments of this application, not all of them. All other embodiments obtained by those skilled in the art based on the described embodiments of this application are within the scope of protection of this application.

[0040] Reference Figure 1 and Figure 2 This embodiment provides a large module segmented gear pitch circle detection and adjustment device, including a guide rail flange 1, a support arm 2, a dial indicator 3 and a measuring rod 4. A centering angle plate 6 is installed at the left end of the support arm 2, and a fixing frame 7 is installed at the right end of the support arm 2. The dial indicator 3 is installed on the fixing frame 7, and the measuring rod 4 is a standard measuring rod adapted to the module of the segmented gear 5.

[0041] The segmented gear 5 is initially fixed to the guide flange 1 using multiple fixing bolts (the fixing bolts are not fully tightened, and the segmented gear 5 can be finely adjusted). The guide flange 1 is pre-fixed to the testing platform, ensuring that its axis is perpendicular to the testing reference plane. The measuring rod 4 is manually placed in the tooth groove of the segmented gear 5, so that both fulcrums of the centering angle plate 6 abut against the outer arc surface of the guide flange 1. At this time, the axis of the support arm 2 is collinear with the radial direction of the guide flange 1 (the radial direction passing through the center of the guide flange 1). The probe of the dial indicator 3 can contact the cylindrical surface of the measuring rod 4. Keeping both fulcrums of the centering angle plate 6 abut against the outer arc surface of the guide flange 1, the centering angle plate 6 slides. The centering angle plate 6... The dial indicator 3 is moved by the support arm 2 and the fixing frame 7, so that the probe of the dial indicator 3 moves to the farthest point from the center of the segmented gear 5 on the outer arc surface of the measuring rod 4. The pointer reading of the dial indicator 3 is recorded. Then, the measuring rod 4 is manually moved to the next tooth groove, and the above operation is repeated. Since the measuring rod 4 is matched with the module of the segmented gear 5, the highest radial point of the outer arc surface of the measuring rod 4 is on the same radial plane as the gear pitch circle. By detecting the maximum difference in the radial position of the measuring rod 4 in each tooth groove, the runout of the gear pitch circle can be indirectly obtained. The runout of the pitch circle is compared with the allowable runout tolerance of the pitch circle in the design. If the runout of the pitch circle is not greater than the allowable tolerance, it is judged to meet the requirements; otherwise, it does not meet the requirements.

[0042] Reference Figure 1 and Figure 2The support arm 2 includes a long arm 21 and a short arm 22. The right end of the long arm 21 has multiple mounting holes 211 arranged linearly along its own axis. The short arm 22 is threaded with two fastening screws 23, which are respectively inserted into the two mounting holes 211 of the long arm 21. A centering plate 6 is installed on the left end of the long arm 21, and a fixing bracket 7 is installed on the right end of the short arm 22. The fastening screws 23 are passed through the mounting holes 211 on the long arm 21 and threadedly connected to the short arm 22. Tightening the fastening screws 23 makes the long arm 21 and the short arm 22 fit tightly together, thereby fixing the long arm 21 and the short arm 22 and keeping their axes collinear. The multiple mounting holes 211 can flexibly adjust the relative position of the short arm 22 and the long arm 21 to adapt to guide rail flanges 1 and segmented gears 5 of different sizes.

[0043] Reference Figure 2 and Figure 3 The centering plate 6 includes an inverted plate 61, a worm gear 62, worm wheels 63, and support legs 64. The inverted plate 61 is fixedly installed on the left end of the long arm 21. The left end of the worm gear 62 is rotatably connected to a pre-set through hole in the left side plate of the inverted plate 61. There are two worm wheels 63, both rotatably mounted between the upper and lower plates of the inverted plate 61 via pins. The two worm wheels 63 are distributed symmetrically on the front and rear sides of the worm gear 62. The worm gear 62 meshes with the two worm wheels 63 respectively. Support legs 64 are fixedly mounted on each worm wheel 63. A connecting shaft 641 is fixedly mounted on the right end of each support leg 64. A small bearing 642 is fixedly mounted on each connecting shaft 641. The inner ring of bearing 642 is fixedly connected to the outer arc surface of connecting shaft 641. The outer arc surface of the outer ring of small bearing 642 abuts against the outer arc surface of guide flange 1. When switching guide flanges 1 with different radii, worm 62 is rotated. Worm 62 drives two support legs 64 to rotate synchronously in opposite directions through meshing with two worm wheels 63. The included angle between the two support legs 64 is adjusted so that the two small bearings 642 are always in close contact with the outer arc surface of guide flange 1, thereby improving the stability of contact with the outer arc surface of guide flange 1. The setting of small bearing 642 changes the sliding friction between support leg 64 and outer arc surface of guide flange 1 to rolling contact, improving the flexibility during movement.

[0044] Reference Figure 2 , Figure 4 and Figure 5A mounting rod 10 slides vertically on the long arm 21 and can rotate around its own axis. The mounting rod 10 has an L-shaped structure. A sleeve 11 is rotatably mounted on the vertical part of the mounting rod 10. The sleeve 11 rolls in contact with the inner arc surface of the arc groove 101 opened at the left end of the guide rail flange 1. The sleeve 11 abuts against the inner arc surface of the arc groove 101, and the small bearing 642 abuts against the outer arc surface of the guide rail flange 1. The two form a bidirectional limiting in the left and right directions, thereby limiting the centering angle plate 6 in the left and right directions. A sleeve 2 14 is rotatably mounted on the horizontal part of the mounting rod 10. The outer arc surface of the sleeve 2 14 abuts against the lower surface of the guide rail flange 1. The sleeve 2 14 and the long arm 21 are fitted together. The centering plate 6 is used to limit the vertical movement of the mounting rod 10. The top of the vertical part of the mounting rod 10 is threaded with a cover plate 12. A spring 13 is sleeved on the upper end of the vertical part of the mounting rod 10. The two ends of the spring 13 abut against the lower surface of the cover plate 12 and the upper surface of the long arm 21, respectively. The spring 13 keeps the sleeve 14 and the long arm 21 clamped to the guide rail flange 1. A limiting plate 15 is fixedly installed on the vertical part of the mounting rod 10. Four positioning holes 16 are evenly opened in the circumference of the limiting plate 15. A positioning pin 9 is fixedly installed on the lower surface of the long arm 21. The positioning pin 9 is inserted into the vertically corresponding positioning hole 16 to limit the direction of the sleeve 14.

[0045] In use, keep the axis of sleeve 2 14 in the front-back direction, place the long arm 21 on the upper surface of the guide flange 1, so that sleeve 1 11 is located on the right side of the inner arc surface of the arc groove 101, and the two small bearings 642 are located on the left side of the outer arc surface of the guide flange 1. Rotate the worm 62, and the worm 62 drives the two support legs 64 to rotate synchronously in opposite directions through meshing with the two worm wheels 63, reducing the included angle between the two support legs 64. Since the outer arc surface of the outer ring of the small bearing 642 abuts against the outer arc surface of the guide flange 1, the left end of the long arm 21 slides to the left relative to the guide flange 1 until the outer arc surface of sleeve 1 11 abuts against the inner arc surface of the arc groove 101 opened at the left end of the guide flange 1. At this time, the small bearing 642 and sleeve 1 11 cooperate to clamp the left side of the guide flange 1. During the process of pushing the support arm 2 to move, the phenomenon of the support arm 2 and the center of the guide flange 1 not coinciding is effectively avoided, ensuring the detection accuracy. Pull down sleeve 2 14. Sleeve 2 14 drives the limiting plate 15 to move down through the mounting rod 10 and separate from the positioning pin 9. At this time, spring 13 is compressed by cover plate 12. Rotate sleeve 2 14 90 degrees so that sleeve 2 14 is directly below guide rail flange 1. Then release it. Under the action of elastic force, spring 13 pushes mounting rod 10 upward to reset through cover plate 12. Positioning pin 9 is inserted into the vertically corresponding positioning hole 16 again, so that sleeve 2 14 and long arm 21 cooperate to clamp guide rail flange 1 in the vertical direction, so as to avoid the long arm 21 being slightly stressed and causing vertical displacement, which would affect the detection accuracy of dial indicator 3.

[0046] Reference Figure 1 , Figure 2 and Figure 7 The mounting bracket 7 includes a slotted plate 71, a mounting block 72, and an adjusting assembly 8. The slotted plate 71 is fixedly mounted on the right end of the short arm 22. A T-shaped slot 711 is formed inside the slotted plate 71. The mounting block 72 is vertically slidably disposed on the inner wall of the T-shaped slot 711. A dovetail groove 712 is formed on the front side wall of the T-shaped slot 711. A dovetail slider 713 is fixedly disposed on the front side of the mounting block 72. The dovetail slider 713 slides in contact with the inner wall of the dovetail groove 712. The dovetail slider 713 improves the stability of the mounting block 72 when it moves vertically. The dial indicator 3 is fixed. The dial indicator 3 is fixedly installed on the mounting block 72. An adjustment component 8 is located at the rear end of the slot plate 71. The adjustment component 8 cooperates with the mounting block 72, allowing for vertical adjustment of the dial indicator 3's height via vertical sliding of the mounting block 72. The adjustment component 8 includes a mounting plate 81, a rotating column 82, and a locking stud 83. There are two mounting plates 81, fixedly installed at the upper and lower ends of the rear side of the slot plate 71 respectively. The rotating column 82 is rotatably positioned between the two mounting plates 81. A spiral guide groove 821 is formed on the outer arc surface of the rotating column 82 (see reference). Figure 6 The mounting block 72 is fixedly provided with a connecting post 84 on its side wall. The rear end of the connecting post 84 slides in contact with the inner wall of the spiral guide groove 821. The rotating post 82 extends to the upper mounting plate 81. The upper mounting plate 81 has a threaded hole on its side wall. The locking stud 83 is threaded into the inside of the threaded hole and abuts against the outer arc surface of the rotating post 82. The mounting block 72 is driven to slide vertically by the adjusting component 8, so that the height of the dial indicator 3 can be continuously and flexibly adjusted.

[0047] Loosen the locking stud 83 and manually rotate the rotating column 82. During the rotation, the rotating column 82 drives the connecting column 84 to move vertically through the spiral guide groove 821, which in turn drives the dial indicator 3 to move vertically through the mounting block 72. Adjust the vertical height of the dial indicator 3. After the probe of the dial indicator 3 is in contact with the measuring rod 4, the adjustment is complete. Rotate the locking stud 83 in the opposite direction again. The locking stud 83 presses against the outer arc surface of the rotating column 82 to lock and fix the rotating column 82, thereby fixing the height of the dial indicator 3.

[0048] The implementation principle of the large module segmented gear pitch circle detection and adjustment device in this application embodiment is as follows:

[0049] First, the segmented gear 5 is initially fixed to the guide flange 1 using multiple fixing bolts. The guide flange 1 is pre-fixed to the testing platform, ensuring its axis is perpendicular to the testing reference plane. Based on the dimensions of the guide flange 1 and the segmented gear 5, the corresponding mounting hole 211 on the long arm 21 is selected. The fastening screw 23 is passed through the mounting hole 211 and threaded onto the short arm 22. The fastening screw 23 is tightened to ensure the long arm 21 and short arm 22 are tightly fitted and their axes are collinear. The worm gear 62 of the centering plate 6 is manually rotated. The worm gear 62 drives the two worm wheels 63 to rotate synchronously in opposite directions. Through the support leg 64, the small bearing 642 is brought into contact with the outer arc surface of the guide flange 1. Simultaneously, the outer arc surface of the sleeve 11 on the mounting rod 10 is brought into contact with the inner wall of the arc groove 101 at the left end of the guide flange 1. This, in conjunction with the small bearing 642, limits the long arm 21 in the left-right direction, ensuring that the axis of the support arm 2 is collinear with the radial direction of the guide flange 1. Pull down sleeve 14 to compress spring 13 and separate limit plate 15 from positioning pin 9. Rotate sleeve 14 to the lower surface of guide flange 1 and then release it. Spring 13 returns to its original position and pushes mounting rod 10 upward. Positioning pin 9 is inserted into the corresponding positioning hole 16 to fix the angle of mounting rod 10. Sleeve 14 is pulled by spring 13 to fit the long arm 21 against the upper surface of guide flange 1.

[0050] Subsequently, the measuring rod 4 is placed in the first tooth groove of the segmented gear 5. The locking stud 83 is manually rotated, and the rotating column 82 is rotated. The rotating column 82 drives the connecting column 84 to move vertically through the spiral guide groove 821. The connecting column 84 drives the mounting block 72 to slide along the T-slot 711 and the dovetail groove 712, thereby adjusting the height of the dial indicator 3 so that the probe of the dial indicator 3 contacts the cylindrical surface of the measuring rod 4. After the adjustment is completed, the locking stud 83 is tightened in the opposite direction to fix the position of the rotating column 82. The two small bearings 642 of the centering plate 6 are kept in contact with the outer arc surface of the guide flange 1, and the centering plate 6 is slowly slid, driving the dial indicator 3 to move along the outer arc surface of the measuring rod 4. When the reading of the dial indicator 3 reaches the maximum value, it is the farthest distance between the outer arc surface of the measuring rod 4 and the center of the segmented gear 5. The reading of the dial indicator 3 at this time is recorded.

[0051] Next, the measuring rod 4 is manually removed from the first tooth groove and placed into the next tooth groove. The operation of sliding the centering plate 6, positioning the measuring rod 4 at its farthest position, and recording the dial indicator 3 reading is repeated. This process is repeated to complete the inspection of all tooth grooves. During the inspection, the small bearing 642 rolls against the outer arc surface of the guide flange 1, and the sleeve 11 rolls against the inner arc surface of the arc groove 101. This ensures that the axis of the support arm 2 is always collinear with the radial direction of the guide flange 1, ensuring the consistency of the inspection benchmark for each tooth groove and avoiding reading errors caused by device misalignment.

[0052] Finally, summarize the dial indicator readings for all tooth slots, calculate the difference between the maximum and minimum values, and compare this difference with the design allowable pitch circle runout tolerance. If the difference is within the tolerance range, the pitch circle accuracy of the segmented gear 5 is deemed to meet the requirements, and no further adjustment is needed. If the difference exceeds the tolerance range, fine-tune the installation posture of the segmented gear 5 according to the reading deviation of each tooth slot. After adjustment, repeat the above inspection steps until the pitch circle runout tolerance meets the design requirements, thus completing the pitch circle inspection and adjustment work for the entire large module segmented gear 5.

[0053] Furthermore, in the description of this application, the terms "installation", "connection", "linking", and "setting" should be interpreted broadly, and those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

Claims

1. A device for detecting and adjusting the pitch circle of a large module segmented gear, characterized in that, The device includes a guide rail flange, a support arm, a dial indicator, and a measuring rod. A segmented gear is initially fixed to the guide rail flange by multiple fixing bolts. A centering plate is installed at the left end of the support arm. When both fulcrums of the centering plate are in contact with the outer arc surface of the guide rail flange, the axis of the support arm is collinear with the radial direction of the guide rail flange. A fixing frame is installed at the right end of the support arm, and a dial indicator is installed on the fixing frame. The measuring rod can be placed in the tooth groove of the segmented gear, and the probe of the dial indicator can contact the cylindrical surface of the measuring rod. The support arm includes a long arm and a short arm; The centering plate includes an inverted plate and support legs; Each of the outriggers has a connecting shaft fixedly installed on its right end, and each connecting shaft has a small bearing fixedly installed on its connecting shaft. The outer arc surface of each small bearing abuts against the outer arc surface of the guide rail flange. A mounting rod is vertically installed on the long arm. The mounting rod has an L-shaped structure. A sleeve is rotatably installed on the mounting rod. The sleeve can roll into contact with the arc surface inside the arc groove opened at the left end of the guide rail flange. The horizontal part of the mounting rod is rotatably equipped with a second sleeve, the outer arc surface of which abuts against the lower surface of the guide rail flange; The mounting bracket includes a slotted plate, a mounting block, and an adjustment assembly; The groove plate is fixedly installed on the right end of the short arm. A T-shaped groove is opened inside the groove plate. The mounting block is vertically slidably disposed on the inner wall of the T-shaped groove. The dial indicator is fixedly installed on the mounting block. An adjustment component is provided at the rear end of the groove plate. The adjustment component is configured to cooperate with the mounting block. The adjustment assembly includes a mounting plate, a rotating column, and a locking stud. There are two mounting plates, which are fixedly installed at the upper and lower ends of the rear side of the slot plate, respectively. The rotating column is rotatably disposed between the two mounting plates. The outer arc surface of the rotating column has a spiral guide groove. A connecting column is fixedly disposed on the side wall of the mounting block. The rear end of the connecting column slides in contact with the inner wall of the spiral guide groove. The rotating column extends above the upper mounting plate. The side wall of the upper mounting plate has a threaded hole. The locking stud is threaded into the inside of the threaded hole and abuts against the outer arc surface of the rotating column.

2. The device for detecting and adjusting the pitch circle of a large module segmented gear according to claim 1, characterized in that: The right end of the long arm has multiple mounting holes arranged linearly along its own axis. The short arm has two fastening screws threadedly connected to it, and the fastening screws are respectively inserted into the mounting holes. The left end of the long arm is equipped with a centering plate, and the fixing bracket is installed on the right end of the short arm.

3. The device for detecting and adjusting the pitch circle of a large module segmented gear according to claim 2, characterized in that: The centering plate also includes a worm and worm wheels. The C-shaped plate is fixedly installed at the left end of the long arm. The left end of the worm is rotatably connected to a pre-set through hole on the left side of the C-shaped plate. There are two worm wheels, both of which are rotatably set between the upper and lower plates of the C-shaped plate via pins. The worm meshes with the two worm wheels respectively. Each worm wheel is fixedly equipped with a support leg. When the worm rotates, it can drive the two worm wheels to drive the two support legs to rotate synchronously in opposite directions, so that the two support legs are matched with the outer arc surface of the guide rail flange.

4. The device for detecting and adjusting the pitch circle of a large module segmented gear according to claim 1, characterized in that: The vertical part of the mounting rod is vertically slidably connected to the inside of the long arm. A cover plate is threaded to the top of the vertical part of the mounting rod. A spring is sleeved on the upper end of the vertical part of the mounting rod. The two ends of the spring abut against the lower surface of the cover plate and the upper surface of the long arm, respectively.

5. The device for detecting and adjusting the pitch circle of a large module segmented gear according to claim 4, characterized in that: The vertical part of the mounting rod can rotate around its own axis. A limiting plate is fixedly installed on the vertical part of the mounting rod. Four positioning holes are evenly opened in the circumferential direction inside the limiting plate. A positioning pin is fixedly installed on the lower surface of the long arm. The positioning pin is inserted into the vertically corresponding positioning hole.

6. The device for detecting and adjusting the pitch circle of a large module segmented gear according to claim 1, characterized in that: The front side wall of the T-shaped groove is provided with a dovetail groove, and a dovetail slider is fixedly provided on the front side of the mounting block. The dovetail slider slides in contact with the inner wall of the dovetail groove.

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