Radial positioning structure for machining large gear ring and positioning method thereof

Abstract

The application discloses a radial positioning structure for machining a big gear ring and a positioning method thereof, which comprises a base and a gear ring, the gear ring is coaxially arranged above the base, a driving assembly for supporting rotation of the gear ring is fixed to the top of the base, a positioning tooth block which extends into the inside of the gear ring and is engaged with the internal gear on the inner circumference of the gear ring is fixed to the top of the base, a movable assembly is arranged above the base, a supporting assembly for supporting the movable assembly and the positioning tooth block to move up and down is arranged on the inside of the base, and an auxiliary assembly is arranged between the supporting assembly and the movable assembly. The application has the beneficial effect that a plurality of press rollers for supporting rotation of the gear ring are arranged above the base, the positions of the plurality of press rollers can be synchronously adjusted by the locking motor in the middle, thereby the gear ring placed in the middle of the plurality of press rollers is automatically centered and locked and clamped, manual adjustment of the supporting position of the clamp is not needed, clamping is more convenient, the initial distance between the adjacent internal gears is kept consistent, and the quality of the gear ring is ensured.

Description

Technical Field

[0001] This invention relates to the field of machining equipment, and specifically to a radial positioning structure and positioning method for machining large gear rings. Background Technology

[0002] Gear rings are fundamental components of machines or parts, connecting related parts into a whole, maintaining their correct relative positions, and enabling them to work in coordination. Therefore, the manufacturing precision of gear rings directly affects the assembly quality of machines or parts, and consequently, the machine's performance and lifespan. Consequently, gear rings generally have high technical requirements. Due to the structural characteristics of machines and the different functions of gear rings within them, gear rings have various structural forms, but they all share the common characteristic of having a cavity-like internal structure. When machining large gear rings, the inner cavity must first be cut out, the inner hole bored, and then the inner tooth grooves machined. However, currently used large gear rings, during the axial cutting of the inner teeth, rely entirely on a rotating component that fixes the entire large gear ring for control of the angle between adjacent inner teeth. Because of the large overall structure of the large gear ring, it is inconvenient to clamp it in fixtures such as three-jaw chucks. Furthermore, due to the large weight of the large gear ring, its stability during rotation is poor, making it prone to producing defective products or even scrapping due to angular deviations during the rotating cutting process. This results in poor precision in the gear ring machining process. Summary of the Invention

[0003] The purpose of this invention is to provide a radial positioning structure and positioning method for machining large gear rings in order to solve the above-mentioned problems. It automatically centers and locks the gear ring placed in the middle of multiple sets of pressure rollers, eliminating the need for manual adjustment of the clamp support position and making clamping more convenient. The position of the gear ring can be adjusted by the drive component to perform the grooving action of the next set of internal teeth, ensuring product quality. See the following description for details.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] The present invention provides a radial positioning structure for machining a large gear ring, comprising a base and a gear ring, the gear ring being coaxially disposed above the base, a drive assembly for supporting the rotation of the gear ring being fixed on the top of the base, a positioning tooth block extending into the inner side of the gear ring and meshing with the internal teeth on the inner circumference of the gear ring being fixed on the top of the base, a movable assembly being disposed above the base, a support assembly for supporting the movable assembly and the positioning tooth block for lifting and moving is disposed inside the base, and an auxiliary assembly being disposed between the support assembly and the movable assembly;

[0006] Two vertically extending guide rods run parallel through the inside of the positioning tooth block. The bottom end of the guide rod is bent horizontally and fixed to the top side of the base. A limit plate is fixed to the top of the guide rod. A spring is sleeved on the outside of the guide rod below the limit plate to keep the positioning tooth block pressed downward.

[0007] Preferably, the base includes a disc-shaped support ring, and a disc-shaped mounting plate is coaxially arranged above the support ring. Multiple sets of transmission frames extending radially outward are evenly distributed on the outer circumference of the mounting plate. The transmission frames are rectangular frames, and each set of transmission frames has a support rod vertically connected to the top side of the support ring fixed on its outer side.

[0008] Preferably, each of the multiple sets of transmission frames has a slider that slides within it. The slider is an I-shaped structure adapted to the transmission frame. The mounting plate has multiple mounting slots corresponding to the multiple sets of transmission frames. A screw is rotatably fitted inside the transmission frame. The screw and the transmission frame are rotatably fitted through a bearing. The screw passes through the slider and is threadedly fitted to the slider. One end of the screw extends into the mounting slot, and a synchronizing gear with its bottom side extending out of the mounting slot is fixed to one end of the screw.

[0009] Preferably, a locking motor is fixed at the top center of the mounting plate, the output end of the locking motor extends downward through the mounting plate, and a gear plate meshing with multiple sets of synchronous gears is fixed at the output end of the locking motor. Each of the multiple sets of sliders is rotatably fitted with a pressure roller, and the pressure roller is a grooved wheel structure that is snapped onto the outer circumference of the gear ring.

[0010] Preferably, the drive assembly includes a motor base fixed to the outside of the slider, a drive motor fixed to the top side of the motor base, the output end of the drive motor extending downward to the inside of the motor base and being connected to the pressure roller via a coupling, a fixing seat welded and fixed to the top side of the support ring at the bottom end of the guide rod, a driven rack fixed to the rear side of the positioning tooth block, and an inclined chip discharge surface on the top side of the positioning tooth block to guide the chips to fall into the inside of the support ring.

[0011] Preferably, the support assembly includes a base plate that is laterally fixed to the top side of the support ring. Each of the four corners of the base plate has a fixing hole for connecting the support ring with a screw. The top of the base plate is provided with four sets of rectangularly distributed limiting frames to support the movable components. A locking frame for supporting auxiliary components is fixed to the outside of the base plate.

[0012] Preferably, the movable component includes a cylinder fixed to the top of the limiting frame, the telescopic end of the cylinder extending downward into the interior of the limiting frame, and a rotating frame fixed to the telescopic end of the cylinder. The rotating frame is a C-shaped frame with its opening facing downward. The rotating frame slides vertically with the limiting frame. A slotting motor is provided on the rear side of the rotating frame. An upper gear is fixed to the bottom output end of the slotting motor. A slotting component for cutting out internal teeth is provided at the bottom of the movable component.

[0013] Preferably, the grooving assembly includes a longitudinal shaft rotatably disposed in the middle of the rotating frame, a lower gear meshing with the upper gear fixed at the end of the longitudinal shaft, the upper gear and the lower gear being a meshing bevel gear structure, and a disc-shaped cutter fixed in the middle of the longitudinal shaft.

[0014] Preferably, a vertically extending active rack is fixed to the rear side of the rotating frame, and the auxiliary component includes a stand fixed vertically within the locking frame. An auxiliary shaft is rotatably mounted on the top of the stand, and a central gear is fixed to the outside of the auxiliary shaft, which meshes with the active rack and the driven rack on both sides respectively.

[0015] The positioning method for the radial positioning structure of the large gear ring machining includes the following steps:

[0016] a. When clamping the gear ring to cut the internal teeth, first place the gear ring between multiple sets of pressure rollers. The locking motor drives the gear disc to rotate, and the gear disc meshes with multiple sets of synchronous gears, thereby driving multiple sets of screws to rotate synchronously. Utilizing the threaded engagement between the screws and the slider, the slider is driven to move radially along the gear ring under the guidance of the transmission frame. This synchronously adjusts the spacing of the pressure rollers at the top of the multiple sets of sliders, so that the multiple sets of pressure rollers are simultaneously pressed against the outer circumference of the gear ring. At the same time, it ensures that the gear ring and the support ring automatically maintain a concentric state, completing the self-centering clamping process of the gear ring.

[0017] b. When cutting the inner circumference of the gear ring, the cylinder drives the rotating frame and the grooving assembly to move upward as a whole. The rotating frame drives the active rack to move upward. Under the transmission action of the central gear, the driven rack and the positioning block move downward synchronously. The cylinder extension end retracts and pulls the rotating frame upward until the driven rack moves down to the position of disengaging from the central gear. At this time, under the compression action of the upper spring, the positioning block keeps the driven rack on the rear side of the positioning block pressed downward, thus always keeping the driven rack separated from the central gear.

[0018] c. When the rotating frame is pulled upward to drive the driven rack to move downward and disengage from the central gear, the cylinder pushes the rotating frame downward to drive the grooving assembly to move downward. The grooving motor drives the longitudinal shaft and the cutter head to rotate. During the downward movement of the cutter, the rotation action cuts the inner teeth of the gear ring. The cylinder alternately lifts and lowers the grooving action and the drive motor rotates the pressure roller. After cutting a set of inner teeth, the cutter disengages from the inner teeth. At this time, the drive motor drives the pressure roller to rotate the gear ring by the angle of one inner tooth. This alternating grooving action of multiple inner teeth is then performed.

[0019] d. The gear ring continues to rotate and cut the groove. When the position of the inner tooth cut by the gear ring rotates to the corresponding position of the driven rack, and the cutter is ensured to be above the gear ring and not in contact with the gear ring, the driven rack is pushed upward to mesh with the central gear. At this time, the cylinder moves downward to make the cutter contact the gear ring to perform the cutting action. The downward movement of the rotating frame and the driving rack can cooperate with the central gear to drive the driven rack and the positioning block to move upward, and connect the positioning block with the rotating frame. This ensures that while the rotating frame moves downward to achieve the grooving action, it can also drive the positioning block to move upward and engage in the cut inner tooth.

[0020] e. The positioning tooth block moves upward and engages with the inner tooth to position the rotating cutting action of the gear ring. While ensuring that the angle between the positioning tooth block and the cutter on the horizontal plane remains constant, the positioning tooth block positions the cutter at the groove position on the gear ring. This ensures that the positioning tooth block is correctly engaged in the cut inner tooth position, allowing the cutter to move downward and cut teeth under the support of the rotating frame. In addition, the inclined chip removal surface on the top side of the positioning tooth block pushes out the chips from the inner side of the cut inner tooth, eliminating the need for subsequent chip cleaning of the gear ring.

[0021] The beneficial effects are as follows: This invention sets multiple sets of pressure rollers above the base to support the rotation of the toothed ring, and the positions of the multiple sets of pressure rollers can be adjusted synchronously by the locking motor in the middle, thereby automatically centering and locking the toothed ring placed in the middle of the multiple sets of pressure rollers, without the need for manual adjustment of the clamp support position, making clamping more convenient.

[0022] Additionally, a positioning tooth block that can move in the opposite direction to the cutter is set above the base. While the cutter moves down to perform the internal tooth cutting action, it pushes the positioning tooth block up to engage with the already cut internal tooth, thereby positioning the rotating cutting position of the cutter and ensuring that the spacing between adjacent internal teeth remains consistent, thus guaranteeing the quality of the tooth ring.

[0023] When the cutter moves upward and disengages from the toothed ring, the positioning tooth block moves downward and disengages from the toothed ring simultaneously. At this time, the toothed ring is in a free state and can adjust its position through the drive component to perform the next set of internal tooth cutting actions, ensuring the continuity of toothed ring cutting. In addition, while the positioning tooth block moves up and down periodically, it can use the inclined chip removal surface on its top surface to push out the chips remaining on the inner side of the internal teeth. Thus, the positioning and cleaning actions are automatically completed during the toothed ring rotation cutting process, making it convenient to use. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a front view structural diagram of the present invention;

[0026] Figure 2 This is a three-dimensional structural schematic diagram of the present invention;

[0027] Figure 3 This is a structural breakdown diagram of the present invention;

[0028] Figure 4 This is a three-dimensional structural diagram of the base of the present invention;

[0029] Figure 5 This is a partial structural breakdown diagram of the present invention;

[0030] Figure 6 This is a three-dimensional structural schematic diagram of the invention from another perspective;

[0031] Figure 7 This is a top view of the structure of the present invention.

[0032] The annotations in the attached figures are explained as follows:

[0033] 1. Base; 101. Support ring; 102. Mounting plate; 103. Transmission frame; 104. Support rod; 105. Screw; 105a. Synchronous gear; 106. Slider; 106a. Pressure roller; 107. Locking motor; 107a. Gear plate; 2. Drive assembly; 201. Drive motor; 202. Motor base; 3. Gear ring; 301. Internal gear; 4. Positioning gear block; 401. Guide rod; 402. Limiting plate; 403. Spring; 404. Fixed seat; 405. Driven rack; 40 6. Chip removal surface; 407. Guide hole; 5. Support assembly; 501. Base plate; 502. Limiting frame; 503. Locking frame; 504. Fixing hole; 6. Movable assembly; 601. Cylinder; 602. Rotating frame; 603. Slotting motor; 603a. Side bracket; 604. Upper gear; 605. Drive rack; 7. Slotting assembly; 701. Longitudinal shaft; 701a. Lower gear; 702. Cutter head; 8. Auxiliary assembly; 801. Stand; 802. Auxiliary shaft; 803. Center gear. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0035] See Figures 1-7As shown, the present invention provides a radial positioning structure for machining a large gear ring, including a base 1 and a gear ring 3. The gear ring 3 is coaxially disposed above the base 1. A drive component 2 for supporting the rotation of the gear ring 3 is fixed on the top of the base 1. A positioning tooth block 4 is fixed on the top of the base 1, extending into the inner side of the gear ring 3 and meshing with the internal teeth 301 on the inner circumference of the gear ring 3. The gear ring 3 is fixed above the base 1 for slotting the internal teeth 301. A movable component 6 is disposed above the base 1. A support component 5 for supporting the movable component 6 and the positioning tooth block 4 for lifting and moving is disposed inside the base 1. An auxiliary component 8 is disposed between the support component 5 and the movable component 6. The auxiliary component 8 is used to drive the movable component 6 through the positioning tooth block 4.

[0036] Two vertically extending guide rods 401 extend parallel through the inside of the positioning tooth block 4 to support the vertical sliding of the positioning tooth block 4. A guide hole 407 extends through the positioning tooth block 4, through which the positioning tooth block 4 and the guide rod 401 slide vertically. The bottom end of the guide rod 401 is bent horizontally and fixed to the top side of the base 1. A limit plate 402 is fixed to the top of the guide rod 401. A spring 403 is sleeved on the outside of the guide rod 401 below the limit plate 402 to keep the positioning tooth block 4 pressed downward.

[0037] As an optional implementation, the base 1 includes a disc-shaped support ring 101. A disc-shaped mounting plate 102 is coaxially disposed above the support ring 101. Multiple sets of transmission frames 103 extending radially outward are evenly distributed on the outer circumference of the mounting plate 102. Each transmission frame 103 is a rectangular frame, and each set of transmission frames 103 has a support rod 104 vertically connected to the top side of the support ring 101 fixed to its outer side. Each set of transmission frames 103 has a slider 106 slidably fitted inside it. The slider 106 has an I-shaped structure adapted to the transmission frame 103, ensuring the sliding stability of the slider 106 within the transmission frame 103. Multiple sets of mounting grooves are provided on the mounting plate 102 corresponding to the multiple sets of transmission frames 103. A screw 105 is rotatably fitted inside each transmission frame 103. The rod 105 and the transmission frame 103 are rotatably engaged by a thrust bearing. The screw 105 passes through the slider 106 and is threadedly engaged with the slider 106. One end of the inner side of the screw 105 extends into the mounting groove, and a synchronous gear 105a with its bottom side extending out of the mounting groove is fixed to one end of the inner side of the screw 105. A locking motor 107 is fixed at the top center of the mounting plate 102. The output end of the locking motor 107 extends downward through the mounting plate 102, and a gear disk 107a that meshes with multiple sets of synchronous gears 105a is fixed to the output end of the locking motor 107. Each of the multiple sets of sliders 106 is rotatably engaged with a pressure roller 106a. The pressure roller 106a is a grooved wheel structure that is snapped onto the outer circumference of the gear ring 3 to ensure that the pressure roller 106a can press and lock the outer circumference of the gear ring 3.

[0038] Drive assembly 2 includes a motor base 202 fixed to the outside of slider 106. A drive motor 201 is fixed to the top side of the motor base 202. The output end of the drive motor 201 extends downward to the inside of the motor base 202 and is connected to the pressure roller 106a via a coupling. The drive motor 201 is a servo motor with a built-in brake to ensure that the drive motor 201 can brake and lock the pressure roller 106a, ensuring the positional support stability of the gear ring 3. A fixing seat 404 welded and fixed to the top side of the support ring 101 is provided at the bottom end of the guide rod 401. A driven rack 405 is fixed to the rear side of the positioning gear block 4. A guide for the chips is provided on the top side of the positioning gear block 4 towards the support. The inclined chip removal surface 406 on the inner side of the ring 101 ensures that when the positioning tooth block 4 moves upward and extends into the middle of the inner tooth 301, it can push out the residual chips inside the inner tooth 301 and roll them out along the chip removal surface 406, thus realizing the automatic cleaning action after the inner tooth 301 is processed. The support component 5 includes a base plate 501 that is horizontally fixed to the top side of the support ring 101. The four corners of the base plate 501 are fixed with through screws to connect the fixing holes 504 of the support ring 101. The top of the base plate 501 is provided with four sets of rectangularly distributed limiting frames 502 to support the movable component 6. The outer side of the base plate 501 is fixed with a locking frame 503 that supports the auxiliary component 8.

[0039] The movable component 6 includes a cylinder 601 fixed to the top of the limiting frame 502. The telescopic end of the cylinder 601 extends downward into the limiting frame 502, and a rotating frame 602 is fixed to the telescopic end of the cylinder 601. The rotating frame 602 is a C-shaped frame with its opening facing downward. The rotating frame 602 slides vertically with the limiting frame 502. A slotting motor 603 is provided on the rear side of the rotating frame 602. An upper gear 604 is fixed to the bottom output end of the slotting motor 603. The bottom of the movable component 6 is provided with a tool for cutting out internal teeth 3. The grooving assembly 7 of 01 includes a longitudinal shaft 701 rotatably mounted in the middle of the rotating frame 602. A lower gear 701a meshing with an upper gear 604 is fixed to the end of the longitudinal shaft 701. The upper gear 604 and the lower gear 701a are meshing bevel gears. A disc-shaped cutter is fixed in the middle of the longitudinal shaft 701. The cutter is rotated by a grooving motor 603 so that when the cutter moves downwards, it can cut the inner teeth 301 on the inner side of the gear ring 3. A vertically extending main... The auxiliary component 8 includes a vertically fixed frame 801 within the locking frame 503, with an auxiliary shaft 802 rotatably mounted on the top of the frame 801. A central gear 803 is fixed to the outer side of the auxiliary shaft 802, meshing with the active rack 605 and the driven rack 405 on opposite sides. The central gear 803 drives the active rack 605 and the driven rack 405, ensuring that the active gear can drive the positioning block 4 upwards when the cutter moves downwards. This ensures the cutter and the positioning block 4 are in opposite directions of motion, allowing the positioning block 4 to serve as the cutter for cutting the positioning structure of the inner tooth 301. The top of the positioning block 4 has an arc-shaped transition. When the gear ring 3 rotates to a new position requiring grooving, if there is a deviation in the rotation angle, causing an angular deviation between the positioning block 4 and the inner tooth 301 during upward movement, the arc-shaped transition at the top of the positioning block 4 can be used to push the gear ring 3 to rotate, generating the deviation angle, thus automatically correcting the deviation and improving the machining accuracy and stability of the gear ring 3.

[0040] The positioning method for the radial positioning structure in the machining of a large gear ring includes the following steps:

[0041] a. When it is necessary to clamp the gear ring 3 to cut the internal teeth 301, first place the gear ring 3 between multiple sets of pressure rollers 106a. The locking motor 107 drives the gear disk 107a to rotate. The gear disk 107a meshes with multiple sets of synchronous gears 105a, thereby driving multiple sets of screws 105 to rotate synchronously. The screws 105 and the slider 106 are threaded together, thereby driving the slider 106 to move radially along the gear ring 3 under the guidance of the transmission frame 103. This synchronously adjusts the spacing of the pressure rollers 106a at the top of the multiple sets of sliders 106, so that the multiple sets of pressure rollers 106a are pressed against the outer circumference of the gear ring 3. At the same time, it ensures that the gear ring 3 and the support ring 101 automatically maintain a concentric state, completing the self-centering clamping process of the gear ring 3.

[0042] b. When cutting the inner circumference of the gear ring 3, the cylinder 601 drives the rotating frame 602 and the grooving assembly 7 to move upward as a whole. The rotating frame 602 drives the active rack 605 to move upward. Under the transmission action of the central gear 803, the driven rack 405 and the positioning block 4 are driven to move downward synchronously. The cylinder 601 retracts and pulls the rotating frame 602 upward until the driven rack 405 moves downward to the position where it is separated from the central gear 803. At this time, under the compression action of the upper spring 403, the positioning block 4 keeps the driven rack 405 on the rear side of the positioning block 4 pressed downward, thus keeping the driven rack 405 separated from the central gear 803.

[0043] c. When the rotating frame 602 is pulled upward to drive the driven rack 405 to move downward to disengage from the central gear 803, the cylinder 601 pushes the rotating frame 602 downward to drive the grooving assembly 7 to move downward. The grooving motor 603 drives the longitudinal shaft 701 and the cutter head 702 to rotate. During the downward movement of the cutter, the rotation action cuts the inner circumference of the gear ring 3 into the inner teeth 301. The cylinder 601 alternately performs the lifting and grooving action and the drive motor 201 rotates the pressure roller 106a. After cutting out a set of inner teeth 301, the cutter disengages from the inner teeth 301. At this time, the drive motor 201 drives the pressure roller 106a to rotate to drive the gear ring 3 to rotate by the angle of one inner tooth 301. The grooving action of multiple inner teeth 301 is performed alternately.

[0044] d. The gear ring 3 continues to rotate and cut grooves. When the position of the internal tooth 301 cut by the gear ring 3 rotates to the corresponding position of the driven rack 405, ensure that the cutter is above the gear ring 3 and not in contact with the gear ring 3. At this time, push the driven rack 405 upward to mesh it with the central gear 803. At this time, the cylinder 601 moves downward to make the cutter contact the gear ring 3 to perform the cutting action. The downward movement of the rotating frame 602 and the driving rack 605 can be used to cooperate with the central gear 803 to drive the driven rack 405 and the positioning tooth block 4 to move upward, and connect the positioning tooth block 4 with the rotating frame 602 for transmission. Ensure that the rotating frame 602 moves downward. While performing the grooving action, it can drive the positioning tooth block 4 to move upward and engage with the already cut internal teeth 301. At the same time, during the subsequent alternating up and down grooving of the internal teeth 301 by the cutter and the positioning tooth block 4, it ensures that the cylinder 601 will not pull the cutter to the highest position, thus preventing the central gear 803 from separating from the driven rack 405 again. This ensures that after the positioning tooth block 4 completes the grooving of several sets of internal teeth 301 at the initial position on the gear ring 3, it can always be in a transmission state with the cutter. The positioning tooth block 4 is used to position the subsequent grooving of several sets of internal teeth 301 on the gear ring 3, increasing the stability and accuracy of the gear ring 3 processing.

[0045] e. The positioning tooth block 4 moves upward and engages with the inner tooth 301 to position the rotating cutting action of the gear ring 3. While ensuring that the angle between the positioning tooth block 4 and the cutter on the horizontal plane remains constant, the positioning tooth block 4 positions the cutting groove of the cutter on the gear ring 3. This ensures that the positioning tooth block 4 is correctly engaged in the position of the cut inner tooth 301, so that the cutter can move downward and cut teeth under the support of the rotating frame 602. In addition, the inclined chip removal surface 406 on the top side of the positioning tooth block 4 pushes and discharges the chips inside the cut inner tooth 301, eliminating the need for subsequent chip cleaning of the gear ring 3.

[0046] By setting multiple sets of pressure rollers 106a above the base 1 to support the rotation of the toothed ring 3, and the positions of the multiple sets of pressure rollers 106a can be adjusted synchronously by the locking motor 107 in the middle, the toothed ring 3 in the middle of the multiple sets of pressure rollers 106a is automatically centered and locked, without the need for manual adjustment of the clamp support position, making clamping more convenient.

[0047] Additionally, a positioning tooth block 4 that can move in the opposite direction to the cutter is provided above the base 1. While the cutter moves down to perform the grooving action of the inner tooth 301, the positioning tooth block 4 is pushed up to engage with the already cut inner tooth 301, so as to position the rotating grooving position of the cutter and ensure that the spacing between adjacent inner teeth 301 remains consistent, thus ensuring the quality of the tooth ring 3.

[0048] When the cutter moves upward and disengages from the toothed ring 3, the positioning tooth block 4 moves downward and disengages from the toothed ring 3 simultaneously. At this time, the toothed ring 3 is in a free state and can adjust the position of the toothed ring 3 through the drive component 2 to perform the next set of grooving actions of the inner teeth 301, ensuring the continuity of the toothed ring 3's cutting action. In addition, while the positioning tooth block 4 moves up and down periodically, it can use the inclined chip removal surface 406 on its top surface to push out the chips remaining on the inner side of the inner teeth 301. Thus, the positioning and cleaning actions are automatically completed during the toothed ring 3's rotation and cutting action, making it convenient to use.

[0049] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A radial positioning structure for a large ring gear machining, characterized by: Includes a base (1) and a gear ring (3). The gear ring (3) is coaxially disposed above the base (1). A drive assembly (2) for supporting the rotation of the gear ring (3) is fixed on the top of the base (1). A positioning tooth block (4) is fixed on the top of the base (1) and extends into the inside of the gear ring (3) and meshes with the internal teeth (301) on the inner circumference of the gear ring (3). A movable assembly (6) is disposed above the base (1). A support assembly (5) for supporting the movable assembly (6) and the positioning tooth block (4) for lifting and moving is disposed inside the base (1). An auxiliary assembly (8) is disposed between the support assembly (5) and the movable assembly (6). The positioning tooth block (4) has two vertically extending guide rods (401) running parallel inside. The bottom end of the guide rod (401) is bent horizontally and fixed to the top side of the base (1). The top end of the guide rod (401) is fixed with a limiting plate (402). A spring (403) is sleeved on the outside of the guide rod (401) below the limiting plate (402) to keep the positioning tooth block (4) pressed downward. The positioning tooth block (4) is fixed with a driven rack (405) on the rear side. The base (1) includes a disc-shaped support ring (101). The support assembly (5) includes a base plate (501) that is horizontally fixed to the top side of the support ring (101). The base plate (501) has fixing holes (504) with screws for connecting the support ring (101) at all four corners. The base plate (501) has four sets of rectangularly distributed limiting frames (502) on the top to support the movable assembly (6). The base plate (501) has a locking frame (503) for supporting the auxiliary assembly (8) fixed on the outside. The movable component (6) includes a cylinder (601) fixed to the top of the limiting frame (502). The telescopic end of the cylinder (601) extends downward into the interior of the limiting frame (502), and a rotating frame (602) is fixed to the telescopic end of the cylinder (601). The rotating frame (602) is a C-shaped frame with the opening facing downward. The rotating frame (602) slides vertically with the limiting frame (502). A slotting motor (603) is provided on the rear side of the rotating frame (602). An upper gear (604) is fixed to the bottom output end of the slotting motor (603). A grooving component (7) for cutting out internal teeth (301) is provided at the bottom of the movable component (6). The grooving assembly (7) includes a longitudinal shaft (701) rotatably disposed in the middle of the rotating frame (602), and a lower gear (701a) meshing with the upper gear (604) is fixed at the end of the longitudinal shaft (701). The upper gear (604) and the lower gear (701a) are bevel gears that mesh with each other. A disc-shaped cutter is fixed in the middle of the longitudinal shaft (701). The rotating frame (602) has a vertically extending active rack (605) fixed to its rear side. The auxiliary component (8) includes a stand (801) vertically fixed in the locking frame (503). An auxiliary shaft (802) is rotatably provided on the top of the stand (801). A central gear (803) is fixed on the outside of the auxiliary shaft (802) and meshes with the active rack (605) and the driven rack (405) on both sides respectively.

2. The radial location structure for machining of a large toothed ring according to claim 1, characterized in that: A disc-shaped mounting plate (102) is coaxially arranged above the support ring (101). Multiple sets of transmission frames (103) extending radially outward are evenly distributed on the outer circumference of the mounting plate (102). The transmission frame (103) is a rectangular frame, and a support rod (104) vertically connected to the top side of the support ring (101) is fixed on the outer side of each set of transmission frames (103).

3. The radial location structure for machining of a large toothed ring according to claim 2, characterized in that: Each of the multiple sets of transmission frames (103) has a slider (106) slidably fitted inside. The slider (106) is an I-shaped structure adapted to the transmission frame (103). The mounting plate (102) is provided with multiple mounting slots corresponding to the multiple sets of transmission frames (103). A screw (105) is rotatably fitted inside the transmission frame (103). The screw (105) is rotatably fitted to the transmission frame (103) through a bearing. The screw (105) passes through the slider (106) and is threadedly fitted to the slider (106). One end of the inner side of the screw (105) extends into the mounting slot, and a synchronous gear (105a) with its bottom side extending out of the mounting slot is fixed to one end of the inner side of the screw (105).

4. The radial location structure for machining of a large toothed ring according to claim 3, characterized in that: A locking motor (107) is fixed at the top center of the mounting plate (102). The output end of the locking motor (107) extends downward through the mounting plate (102). The output end of the locking motor (107) is fixed with a gear disc (107a) that meshes with multiple sets of synchronous gears (105a). The tops of multiple sets of sliders (106) are rotatably fitted with pressure rollers (106a). The pressure rollers (106a) are grooved wheel structures that are snapped onto the outer circumference of the gear ring (3).

5. The radial location structure for machining of a large toothed ring according to claim 4, characterized in that: The drive assembly (2) includes a motor base (202) fixed to the outside of the slider (106). A drive motor (201) is fixed to the top side of the motor base (202). The output end of the drive motor (201) extends downward to the inside of the motor base (202) and is connected to the pressure roller (106a) via a coupling. A fixing seat (404) is welded and fixed to the top side of the support ring (101) at the bottom end of the guide rod (401). An inclined chip discharge surface (406) is provided on the top side of the positioning tooth block (4) to guide the chips to fall into the inside of the support ring (101).

6. The positioning method for the radial positioning structure in the machining of a large gear ring according to claim 5, characterized in that, Includes the following steps: a. When it is necessary to clamp the gear ring (3) to cut the internal teeth (301), first place the gear ring (3) between multiple sets of pressure rollers (106a), drive the gear disc (107a) to rotate by locking motor (107), use the gear disc (107a) to mesh with multiple sets of synchronous gears (105a) to drive multiple sets of screws (105) to rotate synchronously, use the threaded engagement between the screws (105) and the slider (106) to drive the slider (106) to move radially along the gear ring (3) under the guidance of the transmission frame (103), thereby synchronously adjusting the spacing of the pressure rollers (106a) at the top of the multiple sets of sliders (106) to synchronously press the multiple sets of pressure rollers (106a) against the outer circumference of the gear ring (3), while ensuring that the gear ring (3) and the support ring (101) automatically maintain a concentric state, and complete the self-centering clamping process of the gear ring (3); b. When cutting the inner circumference of the gear ring (3), the cylinder (601) drives the rotating frame (602) and the grooving assembly (7) to move upward as a whole. The rotating frame (602) drives the active rack (605) to move upward. Under the transmission action of the central gear (803), the driven rack (405) and the positioning block (4) move downward synchronously. The cylinder (601) retracts and pulls the rotating frame (602) upward until the driven rack (405) moves down to the position of disengaging from the central gear (803). At this time, under the compression action of the upper spring (403), the positioning block (4) keeps the driven rack (405) on the back side of the positioning block (4) pressed downward, thus keeping the driven rack (405) separated from the central gear (803). c. When the rotating frame (602) is pulled upward to drive the driven rack (405) to move down to disengage from the central gear (803), the cylinder (601) pushes the rotating frame (602) downward to drive the grooving assembly (7) to move down. The grooving motor (603) drives the longitudinal shaft (701) and the cutter head (702) to rotate. During the downward movement of the cutter, the rotation action cuts out the inner teeth (301) of the inner circumference of the gear ring (3). The cylinder (601) performs the lifting and grooving action and the drive motor (201) rotates the pressure roller (106a) alternately. After cutting out a set of inner teeth (301), the cutter disengages from the inner teeth (301). At this time, the drive motor (201) drives the pressure roller (106a) to rotate to drive the gear ring (3) to rotate by the angle of one inner tooth (301). The grooving action of multiple inner teeth (301) is performed alternately. d. The gear ring (3) rotates continuously to cut grooves. When the position of the inner tooth (301) cut by the gear ring (3) rotates to the position of the corresponding driven rack (405), and ensures that the cutter is above the gear ring (3) and does not contact the gear ring (3), the driven rack (405) is pushed upward to mesh with the central gear (803). At this time, the cylinder (601) moves downward to make the cutter contact the gear ring (3) to perform the cutting action. The downward movement of the rotating frame (602) and the driving rack (605) can be used to cooperate with the central gear (803) to drive the driven rack (405) and the positioning tooth block (4) to move upward, and connect the positioning tooth block (4) with the rotating frame (602) to ensure that the rotating frame (602) moves downward to achieve the grooving action while driving the positioning tooth block (4) to move upward and engage in the cut inner tooth (301). e. Positioning the rotating cutting action of the gear ring (3) by moving the positioning tooth block (4) upward and engaging it in the inner tooth (301). Under the condition that the angle between the positioning tooth block (4) and the cutter on the horizontal plane is always constant, the positioning tooth block (4) is used to position the cutting groove of the cutter on the gear ring (3) to ensure that the positioning tooth block (4) is correctly engaged in the position of the cut inner tooth (301) that has been cut. Only then can the cutter move downward and cut teeth under the support of the rotating frame (602). In addition, the inclined chip removal surface (406) on the top side of the positioning tooth block (4) is used to push and discharge the chips inside the cut inner tooth (301), so that the subsequent chip cleaning of the gear ring (3) is not required.

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