A machining tool for large modulus worm

Abstract

This utility model discloses a machining fixture suitable for large module worm gears, including a spindle turntable. A spindle is fixedly installed at the center of the outer surface of the spindle turntable. The outer surface of the spindle has several guide grooves, which are circumferentially distributed at equal intervals around the center point of the spindle. Each guide groove has a fixing hole at its tail end and a square groove at its front end. A limit spring is fixedly installed inside the square groove, and a limit block is fixedly installed at the top of the limit spring. A spindle sleeve is fitted around the spindle, and a guide strip adapted to the guide groove is installed on the inner wall of the spindle sleeve. A positioning hole is opened at the tail end of the spindle sleeve, and a three-jaw chuck is fixedly installed at the top of the spindle sleeve. This utility model improves the existing screw clamping and fixing design by replacing it with a three-jaw chuck for clamping and fixing the worm gear, thereby effectively improving the clamping stability of the worm gear, improving the clamping effect, and exhibiting better high-stability clamping characteristics.

Description

Technical Field

[0001] This utility model relates to the field of worm gear processing technology, specifically to a processing fixture suitable for large module worm gears. Background Technology

[0002] A worm gear is a special type of gear with one or more helical teeth. It is usually paired with a worm wheel to form an interlocking gear pair, used to transmit motion and power between two spatially interlocking shafts. It is commonly found in mechanical transmission systems. A worm gear with holes refers to a worm gear with locating holes of a certain size drilled along the axial direction at one or both ends. In the past, when machining large-module worm gears using small machine tools, the clamping force of the spring collet that drives the worm gear to rotate was insufficient. During the milling process, the worm gear was prone to slipping relative to the spring collet, and the worm gear would stop rotating under the obstruction of the cutting tool, thus affecting the machining of the worm gear. In severe cases, it could even cause the worm gear blank to be scrapped. Existing publicly available patent CN202222240723.1 discloses a tooling suitable for machining large module worm gears, including a mandrel, a set screw, and a connecting sleeve. In this prior art, the mandrel can be keyed to the positioning hole at the end of the worm gear via a keyway. The worm gear is essentially limited by the mandrel in the circumferential direction, thereby allowing the worm gear to rotate under the drive of the mandrel. Furthermore, the connecting sleeve is fixed relative to the mandrel. After the set screw passes through the connecting sleeve and comes into contact with the worm gear, the worm gear is essentially clamped by the set screw and the connecting sleeve. By tightening the set screw, the worm gear can obtain a large clamping force. Based on the search and application of the above-mentioned existing technologies, it was found that the mandrel and worm are only limited by a keyway. In the process of high-intensity processing, this connection method is not firm. At the same time, the method of tightening the worm with screws also has a certain degree of instability, which affects the processing stability of large module worms. Utility Model Content

[0003] The purpose of this invention is to provide a machining fixture suitable for large module worm gears, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a machining fixture suitable for large module worm gears, comprising a spindle turntable, a spindle fixedly mounted at the center of the outer surface of the spindle turntable, a plurality of guide grooves being formed on the outer surface of the spindle, the plurality of guide grooves being circumferentially distributed at equal intervals through the center point of the spindle, a fixing hole being formed at the tail end of each guide groove, a square groove being formed at the front end of each guide groove, a limit spring being fixedly mounted inside the square groove, a limit block being fixedly mounted at the top end of the limit spring, a spindle sleeve being fitted around the spindle, a guide strip adapted to the guide groove being installed on the inner wall of the spindle sleeve, a positioning hole being formed at the tail end of the spindle sleeve, a limit groove adapted to the limit block being formed at the front end of the spindle sleeve, and a three-jaw chuck being fixedly mounted at the top end of the spindle sleeve.

[0005] Preferably, the shaft sleeve and the guide strip adopt an integral molding structure design.

[0006] Preferably, both the fixing hole and the positioning hole are threaded holes, and the fixing hole and the positioning hole are provided with fixing bolts that are adapted to their diameters.

[0007] Preferably, the outer wall of the spindle is provided with a plurality of evenly distributed external teeth.

[0008] Preferably, the outer surface of the shaft core turntable away from the shaft core has a plurality of connecting holes, and the plurality of connecting holes are circumferentially distributed at equal intervals through the center point of the shaft core turntable.

[0009] Preferably, the guide groove has a long, linear structure design.

[0010] Compared with the prior art, the beneficial effects of this utility model are: This utility model relates to a large-module worm gear machining fixture. Through the cooperation of a core sleeve and a core, the core sleeve can be used to limit and fix the installation. The worm gear being machined can then be fixed using a three-jaw chuck on the core sleeve, improving machining efficiency and providing better worm gear clamping stability. Simultaneously, the core sleeve can be easily separated and disassembled from the core. This detachable design allows for convenient periodic disassembly and maintenance of the core sleeve, offering convenient maintenance and repair. Assembly is also easy, enhancing overall practicality. The combination of the core and core sleeve provides both initial installation limitation and subsequent bolt fixing, resulting in more convenient assembly and higher stability in use. Meanwhile, when the three-jaw chuck is used in this utility model, it can clamp one end of a large-module worm gear by rotating and tightening it, thereby effectively improving the clamping stability. This utility model improves the existing screw clamping and fixing design by using a three-jaw chuck to clamp and fix the worm gear, thereby effectively improving the clamping stability of the worm gear, improving the clamping effect, and having better high-stability clamping characteristics, improving the processing effect and processing quality of large-module worm gears, and improving the stability of the processing process. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall assembly state of the tooling according to an embodiment of the present utility model; Figure 2 This is a right-side perspective three-dimensional structural diagram of the shaft core and shaft core sleeve in a separated state according to an embodiment of the present utility model; Figure 3 This is a left-side perspective three-dimensional structural diagram of the shaft core and shaft core sleeve in a separated state according to an embodiment of this utility model; Figure 4 This is a schematic diagram of the internal structure of the shaft sleeve according to an embodiment of the present utility model; Figure 5 This is a schematic diagram of the internal cross-sectional structure of the shaft core according to an embodiment of the present utility model.

[0012] In the diagram: 1. Shaft core turntable; 2. External gear; 3. Coupling hole; 4. Shaft core; 5. Guide groove; 6. Fixing hole; 7. Square groove; 8. Limiting spring; 9. Limiting block; 10. Shaft core sleeve; 11. Guide strip; 12. Positioning hole; 13. Limiting groove; 14. Three-jaw chuck. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0014] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0015] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0016] Please see Figure 1-5 This utility model provides an embodiment of a machining fixture suitable for large module worm gears, including a spindle turntable 1. A spindle 4 is fixedly installed at the center of the outer surface of the spindle turntable 1. A plurality of guide grooves 5 are formed on the outer surface of the spindle 4. The guide grooves 5 are designed as long strips with linear structure. The plurality of guide grooves 5 are circumferentially distributed at equal intervals through the center point of the spindle 4. A fixing hole 6 is formed at the tail end of each guide groove 5. A square groove 7 is formed at the front end of each guide groove 5. A limit spring 8 is fixedly installed inside the square groove 7. A limit block 9 is fixedly installed at the top of the limit spring 8. In this structure, by pressing the limit block 9, the limit spring 8 at the bottom can be compressed and the limit block 9 can be retracted into the square groove 7. When the external force of pressing is removed, the compressed limit spring 8 can be elastically reset, thereby popping out the limit block 9. Furthermore, a shaft sleeve 10 is fitted on the outside of the shaft core 4, and a guide strip 11 adapted to the guide groove 5 is installed on the inner wall of the shaft core sleeve 10. A positioning hole 12 is opened at the tail end of the shaft core sleeve 10, and a limiting groove 13 adapted to the limiting block 9 is opened at the front end of the shaft core sleeve 10. A three-jaw chuck 14 is fixedly installed at the top end of the shaft core sleeve 10. In order to fix the fixing hole 6 and the positioning hole 12 with bolts, both the fixing hole 6 and the positioning hole 12 are threaded holes, and the fixing hole 6 and the positioning hole 12 are equipped with fixing bolts that are adapted to their hole diameters. The three-jaw chuck 14 is a mature existing technology product. The three-jaw chuck 14 is a mechanical device used on machine tools to clamp and position workpieces. It achieves workpiece clamping through the radial movement of three movable jaws. It is widely used in machining tools. The working principle of the three-jaw chuck 14 is that the planar thread is driven to rotate by three bevel gears, so that the jaws move concentrically in the radial direction, thereby clamping workpieces of different diameters. This is a mature existing technology product, and this manual will not elaborate on it further. When used in this invention, the three-jaw chuck 14 can clamp a large-module worm gear by rotating and tightening one end of the worm gear, thereby effectively improving the clamping stability. This invention improves the existing screw clamping design by using a three-jaw chuck to clamp and fix the worm gear, thereby effectively improving the clamping stability of the worm gear, enhancing the clamping effect, and exhibiting good high-stability clamping characteristics. This improves the processing effect and quality of large-module worm gears and enhances the stability of the processing process.

[0017] In this utility model, the shaft sleeve 10 can be fitted onto the outside of the shaft core 4. When it is necessary to fit, the four guide strips 11 inside the shaft sleeve 10 can be aligned with the guide grooves 5 of the shaft core 4 respectively. Then, the four limiting blocks 9 are pressed to retract the four limiting blocks 9 into the square groove 7. After that, the shaft sleeve 10 is slid into the top of the shaft core 4. This utility model uses the guide strip 11 and the guide groove 5 in a structural cooperation, which can play a better limiting and guiding role during the sliding insertion of the shaft core sleeve 10, prevent the shaft core sleeve 10 from rotating, and improve the structural limiting effect. After the shaft sleeve 10 is completely fitted onto the outside of the shaft core 4, the limiting block 9 is no longer blocked by the shaft sleeve 10. The limiting spring 8 compressed at its tail end can be reset. After the reset, the limiting spring 8 can pop out the limiting block 9, so that the limiting block 9 can be inserted into the limiting groove 13 of the shaft sleeve 10. In this way, through the structural cooperation between the limiting block 9 and the limiting groove 13, the shaft sleeve 10 can be effectively limited to prevent it from sliding out automatically, thus having the corresponding anti-falling limiting effect. After the limiting block 9 is inserted into the limiting groove 13, the fixing hole 6 and the positioning hole 12 are aligned with each other. Then, fixing bolts are installed in the four aligned holes respectively, so as to complete the limiting and fixing connection between the shaft sleeve 10 and the shaft 4. When it is necessary to disassemble the shaft sleeve 10, simply fix the bolts in the fixing hole 6 and the positioning hole 12 first, then press the four corresponding limiting blocks 9 through the limiting groove 13 to make the limiting blocks 9 retract into the square groove 7 again, and then pull out the shaft sleeve 10 to complete the quick disassembly of the sleeve rod. The assembly is simple and the disassembly is convenient.

[0018] In this embodiment, in order to improve the integrated use effect of the shaft core sleeve 10 and the guide strip 11, the shaft core sleeve 10 and the guide strip 11 adopt an integral molding structure design.

[0019] In this embodiment, in order to facilitate the connection of the shaft core turntable 1 of this utility model to the external drive shaft, a plurality of connecting holes 3 are provided on the outer surface of the end of the shaft core turntable 1 away from the shaft core 4. The plurality of connecting holes 3 are circumferentially distributed at equal intervals through the central point of the shaft core turntable 1. A coupling can be connected through the coupling hole 3, and an external rotary drive shaft can be connected through the coupling, thereby driving the machining fixture of this utility model to rotate as a whole. The outer wall of the shaft core turntable 1 is provided with several evenly distributed external teeth 2. When the shaft core turntable 1 rotates, the external teeth 2 on its outer wall can rotate synchronously. In actual use, the outer side of the external teeth 2 can mesh with the transmission gear. Thus, the shaft core turntable 1 can drive the external transmission gear to rotate through the external teeth 2, which has a good rotational transmission effect and improves the versatility of the structure. At the same time, the external transmission gear can also drive the shaft core turntable 1 to rotate, which has a certain bidirectional transmission effect.

[0020] Working principle: The machining fixture of this utility model can be connected to a coupling through the coupling hole 3 provided in the shaft core turntable 1. The coupling can then be connected to an external rotary drive shaft, thereby driving the machining fixture of this utility model to rotate as a whole. In actual use, the spindle turntable 1 and the spindle sleeve 10 are covered with a mounting box, so that the machining fixture of this utility model can be installed as a whole on the worm gear machining machine tool through the mounting box, thereby ensuring normal use effect. The machining fixture of this utility model is equipped with a three-jaw chuck 14. When used in this utility model, the three-jaw chuck 14 can clamp one end of a large-module worm gear by rotating and tightening, thereby effectively improving the clamping stability. This utility model improves the existing screw clamping and fixing design by replacing it with a three-jaw chuck for clamping and fixing the worm gear, thereby effectively improving the clamping stability of the worm gear, improving the clamping effect, and having better high-stability clamping characteristics. This enhances the machining effect and quality of large-module worm gears and improves the stability of the machining process. Meanwhile, the shaft sleeve 10 of this utility model is designed with a detachable limiting structure between the shaft core 4 and the shaft core sleeve 10. The shaft core sleeve 10 can be sleeved on the outside of the shaft core 4. When it is necessary to sleeve it, the four guide strips 11 inside the shaft core sleeve 10 can be aligned with the guide grooves 5 of the shaft core 4 respectively. Then, press the four limiting blocks 9 to retract the four limiting blocks 9 into the square groove 7. Then, slide the shaft core sleeve 10 into the top of the shaft core 4. This utility model uses the guide strip 11 and the guide groove 5 in a structural cooperation, which can play a better limiting and guiding role during the sliding insertion of the shaft core sleeve 10, prevent the shaft core sleeve 10 from rotating, and improve the structural limiting effect. After the shaft sleeve 10 is completely fitted onto the outside of the shaft core 4, the limiting block 9 is no longer blocked by the shaft sleeve 10. The limiting spring 8 compressed at its tail end can be reset. After the reset, the limiting spring 8 can pop out the limiting block 9, so that the limiting block 9 can be inserted into the limiting groove 13 of the shaft sleeve 10. In this way, through the structural cooperation between the limiting block 9 and the limiting groove 13, the shaft sleeve 10 can be effectively limited to prevent it from sliding out automatically, thus having the corresponding anti-falling limiting effect. After the limiting block 9 is inserted into the limiting groove 13, the fixing hole 6 and the positioning hole 12 are aligned with each other. Then, fixing bolts are installed in the four aligned holes respectively, so as to complete the limiting and fixing connection between the shaft sleeve 10 and the shaft 4. When it is necessary to disassemble the shaft sleeve 10, simply fix the bolts in the fixing hole 6 and the positioning hole 12 first, then press the four corresponding limiting blocks 9 through the limiting groove 13 to make the limiting blocks 9 retract into the square groove 7 again, and then pull out the shaft sleeve 10 to complete the quick disassembly of the sleeve rod. The assembly is simple and the disassembly is convenient.

[0021] This utility model relates to a large-module worm gear machining fixture. Through the cooperation of the shaft core sleeve 10 and the shaft core 4, the shaft core sleeve 10 can be used to limit and fix the installation. The worm gear being machined can then be fixed by the three-jaw chuck 14 on the shaft core sleeve 10, improving the machining effect and providing better worm gear clamping stability. Simultaneously, the shaft core sleeve 10 can be easily separated and disassembled from the shaft core 4. This detachable structural design facilitates regular disassembly and maintenance of the shaft core sleeve 10, providing convenient maintenance and repair. Assembly is also convenient, enhancing overall practicality. The use of the shaft core 4 and the shaft core sleeve 10 for limiting and cooperating provides both initial installation limitation and subsequent bolt fixing, making assembly more convenient and improving operational stability.

[0022] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A machining fixture suitable for large module worm gears, comprising a spindle (1), characterized in that, A shaft core (4) is fixedly installed at the center of the outer surface of the shaft core turntable (1). A plurality of guide grooves (5) are opened on the outer surface of the shaft core (4). The plurality of guide grooves (5) are circumferentially distributed at equal intervals through the center point of the shaft core (4). A fixing hole (6) is opened at the tail end of each guide groove (5). A square groove (7) is opened at the front end of each guide groove (5). A limit spring (8) is fixedly installed inside the square groove (7). A limit block (9) is fixedly installed at the top of the limit spring (8). A shaft core sleeve (10) is sleeved on the outside of the shaft core (4). A guide strip (11) adapted to the guide groove (5) is installed on the inner wall of the shaft core sleeve (10). A positioning hole (12) is opened at the tail end of the shaft core sleeve (10). A limit groove (13) adapted to the limit block (9) is opened at the front end of the shaft core sleeve (10). A three-jaw chuck (14) is fixedly installed at the top end of the shaft core sleeve (10).

2. The machining fixture for large module worm gears according to claim 1, characterized in that: The shaft sleeve (10) and the guide strip (11) adopt an integrated molding structure design.

3. The machining fixture for large module worm gears according to claim 1, characterized in that: The fixing hole (6) and the positioning hole (12) are both threaded holes, and the fixing hole (6) and the positioning hole (12) are provided with fixing bolts that are adapted to their hole diameters.

4. The machining fixture for large module worm gears according to claim 1, characterized in that: The outer wall of the spindle (1) is provided with a number of evenly distributed external teeth (2).

5. The machining fixture for large module worm gears according to claim 1, characterized in that: The outer surface of the shaft core turntable (1) away from the shaft core (4) is provided with a plurality of connecting holes (3), and the plurality of connecting holes (3) are distributed circumferentially at equal intervals through the center point of the shaft core turntable (1).

6. The machining fixture for large module worm gears according to claim 1, characterized in that: The guide groove (5) is a long strip linear structure design.

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