Universal fixture for pitch circle gear shaping

Abstract

The utility model belongs to the technical field of clamp, and disclose a kind of small section round gear cutting universal fixture, comprising: workbench, the upper end surface of workbench is equipped with base, base is equipped with positioning sleeve, positioning sleeve is equipped with blank, gasket is installed between blank and base, the upper end of gasket is equipped with nut, and the nut is connected and installed between base, base is integrated with: bearing plate, bearing rod, mounting plate and tension thread hole, bearing rod and mounting plate are respectively fixed in the outer wall both ends of bearing plate, the lateral wall of mounting plate is opened in tension thread hole, the utility model can satisfy the processing demand of various specifications few teeth number, small modulus special gear external tooth shape by replacing different specifications positioning sleeve, with very high versatility;The mounting and dismounting process of clamp is simple and fast, and operator can quickly replace blank and positioning sleeve, improve production efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of clamping technology, specifically relating to a general-purpose clamp for small-section round teeth. Background Technology

[0002] In the machining of external gear teeth with few teeth and small module, gear shaping has become a necessary alternative due to the limitations of conventional gear hobbing equipment. However, existing gear shaping equipment and fixtures have the following problems:

[0003] The central mounting hole of the rotary table is relatively large, requiring conversion and installation using an external gear clamp.

[0004] The fixture has poor versatility and can only be used to position gear blanks of specific sizes, making it difficult to adapt to changes in the positioning reference.

[0005] This situation limits the flexibility and efficiency of gear machining, and increases production costs and operational complexity. Therefore, developing a versatile external gear shaping fixture that can adapt to various positioning reference changes is of great significance for improving the accuracy and efficiency of gear machining. Utility Model Content

[0006] The purpose of this utility model is to provide a universal fixture for small-section round teeth to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a universal fixture for small-section round teeth, comprising: a worktable, a base mounted on the upper surface of the worktable, a positioning sleeve fitted on the outer side of the base, a tooth blank fitted on the outer side of the positioning sleeve, a washer installed between the tooth blank and the base, a nut installed on the upper end of the washer, and the nut being connected and installed with the base.

[0008] Preferably, the base integrates a support plate, a support rod, a mounting plate, and a tensioning threaded hole. The support rod and the mounting plate are respectively fixed to both ends of the outer wall of the support plate. The tensioning threaded hole is opened on the side wall of the mounting plate. The outer surface of the support rod is in a mating relationship with the inner wall of the positioning sleeve and the nut. The mounting plate is adapted to the positioning surface of the worktable.

[0009] Through the above technical solution:

[0010] When using it, first, firmly install the base on the workbench, and use the bottom pull rod to tighten and fix the base on the workbench to ensure that it will not shift during the processing.

[0011] Select and replace the appropriate positioning sleeve according to the specifications of the gear blank to be processed. The outer diameter of the positioning sleeve matches the inner hole of the gear blank to ensure the positioning of the gear blank. Insert the selected positioning sleeve into the base.

[0012] The gear blank to be machined is fitted into the positioning sleeve. The gear blank mates with the outer circle of the positioning sleeve to ensure the positioning of the gear blank. It is crucial to ensure the accurate installation position of the gear blank on the positioning sleeve to guarantee the precision of subsequent machining.

[0013] A clamping shim is placed on the upper end of the gear blank. The shim is used to adjust the clearance and provide additional support to ensure the gear blank remains stable during machining.

[0014] Secure the gear blank and washer to the base using a clamping nut. The nut is threaded to the base, ensuring the gear blank is firmly clamped. When tightening the nut, be careful to maintain appropriate force to prevent over-clamping that could cause deformation or damage.

[0015] The positioning accuracy of this fixture is achieved through the cooperation between the bearing rod and the positioning sleeve. This cooperation ensures that the fixture can meet the positioning requirements of level 7 accuracy when machining the external tooth profile of special gears with few teeth and small module.

[0016] This small-section universal gear shaping fixture is mainly suitable for small-sized gear shaping machines, such as CNC gear shaping machines. Its compact design and reasonable structure enable efficient gear machining within a limited space.

[0017] By replacing the positioning sleeves of different specifications, this fixture can meet the machining needs of special gears with a small number of teeth and a small module, exhibiting high versatility. The precise fit and strict design tolerances ensure the fixture's positioning during machining, meeting the requirements of grade 7 accuracy. The fixture's installation and disassembly process is simple and quick, allowing operators to rapidly change gear blanks and positioning sleeves, improving production efficiency. The reasonable structural design and high-quality material selection ensure the fixture's stability and durability during use.

[0018] The support rod has multiple mounting slots on its upper side wall, and each mounting slot has a movable plate movably connected to it. When the movable plates are located in the mounting slots, they are coaxial with the support rod. Each mounting slot has a receiving slot on its inner wall, and each receiving slot is connected to the side wall of the movable plate with a spring.

[0019] Through the above technical solution:

[0020] During use, when installing the nut onto the support rod, the movable plates need to be squeezed to allow each plate to smoothly enter the mounting slot. At this time, the multiple movable plates remain coaxial with the support rod within the mounting slot, ensuring that the mounting slot does not obstruct or interfere with the nut installation process.

[0021] After installation, the movable plate rests above the nut. At this point, under the elastic force of the spring, the end of the movable plate near the nut will tilt and protrude from the mounting groove. This tilted design obstructs the movement path of the nut, effectively preventing the nut from loosening or falling off due to vibration or external forces during equipment operation. Specifically, the tilted movable plate acts like a "stop," creating a "barrier" in the nut's movement path. This obstruction can only be released under specific operations, thus achieving the locking function of the nut. This design effectively prevents the nut from loosening or falling off. This structure not only ensures a smooth installation process but also improves the stability and reliability of the entire clamp, ensuring a good locking effect under various working conditions.

[0022] Each of the mounting slots has a secondary slot on one side, and each of the movable plates has a secondary rope connected to its side wall, the secondary rope passing through the secondary slot.

[0023] Preferably, the support rod has a main groove, which is connected to the auxiliary groove. A main rope passes through the main groove and is connected to the auxiliary rope. A lifting plate is installed at one end of the main rope outside the main groove.

[0024] An oil injection groove is provided on the upper side wall of the bearing rod, and the oil injection groove is connected to the main groove.

[0025] Through the above technical solution:

[0026] In some situations, when it is inconvenient or impossible to operate the movable plate by hand, it can be controlled by pulling the lifting plate. The specific operation is as follows: Pull the lifting plate, and the lifting plate transmits tension through the main rope connected to it. The movement of the main rope further pulls the auxiliary rope, which in turn applies tension to the side wall of the movable plate. This force transmission allows the movable plate to smoothly enter the mounting slot, thus enabling remote control of the movable plate. This design is particularly practical when space is limited or when precise control of the movable plate's position is required, ensuring ease and flexibility of operation.

[0027] Furthermore, the design of the oil injection groove further enhances the reliability of the entire system. The oil injection groove is connected to the main and auxiliary grooves, facilitating the injection of lubricating oil into these grooves. Regularly adding lubricating oil to the oil injection groove effectively prevents jamming or wear of the main and auxiliary ropes during operation, ensuring smooth operation of the rope system. This lubrication mechanism not only extends the service life of the rope but also improves the stability and durability of the entire clamp.

[0028] Compared with the prior art, the beneficial effects of this utility model are:

[0029] (1) By replacing the positioning sleeves of different specifications, this utility model can meet the processing requirements of special gears with a small number of teeth and a small module, and has high versatility. The installation and disassembly process of the fixture is simple and quick, and the operator can quickly replace the gear blank and the positioning sleeve to improve production efficiency.

[0030] (2) This utility model prevents the nut from falling off by setting a movable plate and spring. When in use, the movable plate stays above the nut. Under the elastic action of the spring, the end of the movable plate near the nut will tilt and protrude out of the mounting groove. This tilted design makes the movable plate block the movement path of the nut, effectively preventing the nut from loosening or falling off due to vibration or external force during the operation of the equipment. Attached Figure Description

[0031] Figure 1 This is a basic structural diagram of the universal tooth-shaping fixture of this utility model;

[0032] Figure 2 This is a schematic diagram of the structure of the base of this utility model;

[0033] Figure 3 This is a schematic diagram of the positioning sleeve of this utility model;

[0034] Figure 4 This is a schematic diagram of the structure of the lifting plate of this utility model;

[0035] Figure 5 This is a schematic diagram of the structure of the movable plate of this utility model;

[0036] Figure 6 This is a schematic diagram of the structure of the spring of this utility model;

[0037] In the diagram: 1. Workbench; 2. Base; 21. Bearing plate; 22. Bearing rod; 23. Mounting plate; 24. Tensioning threaded hole; 3. Positioning sleeve; 4. Gear blank; 5. Washer; 6. Nut; 7. Mounting groove; 8. Movable plate; 9. Receiving groove; 10. Spring; 11. Secondary groove; 12. Secondary rope; 13. Main groove; 14. Main rope; 15. Lifting plate; 16. Oil filling groove. Detailed Implementation

[0038] The present invention will now be described in further detail with reference to the accompanying drawings, but the present invention is not limited thereto.

[0039] Please see Figures 1-3 As shown, this utility model provides the following technical solution: a universal fixture for small-section round teeth, comprising: a workbench 1, a base 2 mounted on the upper surface of the workbench 1, a positioning sleeve 3 fitted on the outer side of the base 2, a tooth blank 4 fitted on the outer side of the positioning sleeve 3, a washer 5 installed between the tooth blank 4 and the base 2, a nut 6 installed on the upper end of the washer 5, and the nut 6 is connected to the base 2.

[0040] Furthermore, the base 2 integrates a bearing plate 21, a bearing rod 22, a mounting plate 23, and a tension threaded hole 24. The bearing rod 22 and the mounting plate 23 are respectively fixed to the two ends of the outer wall of the bearing plate 21. The tension threaded hole 24 is opened on the side wall of the mounting plate 23. The outer surface of the bearing rod 22 is in a mating relationship with the inner wall of the positioning sleeve 3 and the nut 6. The mounting plate 23 is adapted to the positioning surface of the worktable 1.

[0041] Through the above technical solution:

[0042] When using it, first, firmly install the base 2 on the workbench 1, and use the bottom pull rod to tighten and fix the base 2 on the workbench 1 to ensure that it will not shift during the processing.

[0043] According to the specifications of the gear blank 4 to be processed, select a suitable positioning sleeve 3 for replacement. The outer diameter of the positioning sleeve 3 matches the inner hole of the gear blank 4 to ensure the positioning of the gear blank 4. Install the selected positioning sleeve 3 into the base 2. The outer diameter of the positioning sleeve 3 is φD, and its tolerance range is φD0-0.015, ensuring that the fit clearance with the inner hole of the gear blank 4 is within the allowable range.

[0044] The gear blank 4 to be machined is fitted into the positioning sleeve 3. The inner diameter of the gear blank 4 is φD, with a tolerance range of φD+0.02+0.01, which matches the outer circle of the positioning sleeve 3 to ensure the positioning of the gear blank 4. It is essential to ensure that the gear blank 4 is accurately positioned on the positioning sleeve 3 to guarantee the accuracy of subsequent machining.

[0045] A clamping shim 5 is placed on the upper end of the gear blank 4. The shim 5 is used to adjust the clearance and provide additional support to ensure that the gear blank 4 remains stable during machining.

[0046] Secure the tooth blank 4 and the washer 5 to the base 2 using the clamping nut 6. The nut 6 is connected to the base 2 by threads to ensure that the tooth blank 4 is firmly clamped. When tightening the nut 6, be careful to maintain an appropriate force to prevent over-clamping that could cause deformation or damage.

[0047] The positioning accuracy of the fixture is achieved through the precise fit between the bearing rod 22 and the positioning sleeve 3. This precise fit ensures that the fixture can meet the positioning requirements of level 7 accuracy when machining the external tooth profile of special gears with few teeth and small module.

[0048] This small-section universal gear shaping fixture is mainly suitable for small-sized gear shaping machines, such as the YKS5132 (m8X320) CNC gear shaping machine. Its compact design and reasonable structure enable efficient gear machining within a limited space.

[0049] By replacing the positioning sleeve 3 with different specifications, this fixture can meet the machining needs of special gears with a small number of teeth and a small module, and has high versatility. The precise fit and strict design tolerances ensure the positioning of the fixture during the machining process and meet the requirements of grade 7 accuracy. The installation and disassembly of the fixture are simple and quick, and operators can quickly replace the gear blank 4 and the positioning sleeve 3 to improve production efficiency. The reasonable structural design and high-quality material selection ensure the stability and durability of the fixture during use.

[0050] Please see Figures 1-6 As shown, multiple mounting slots 7 are provided on the upper side wall of the support rod 22. Movable plates 8 are movably connected in each of the multiple mounting slots 7. When the multiple movable plates 8 are located in the mounting slots 7, they are coaxial with the support rod 22. Receiving slots 9 are provided on the inner walls of the multiple mounting slots 7. A spring 10 is connected between each receiving slot 9 and the side wall of the movable plate 8.

[0051] Through the above technical solution:

[0052] During use, when the nut 6 is fitted onto the support rod 22, the movable plates 8 need to be squeezed to allow each movable plate 8 to smoothly enter the mounting groove 7. At this time, the multiple movable plates 8 remain coaxial with the support rod 22 within the mounting groove 7, ensuring that the mounting groove 7 does not obstruct or interfere with the fitting process of the nut 6.

[0053] After installation, the movable plate 8 rests above the nut 6. At this time, under the elastic action of the spring 10, the end of the movable plate 8 near the nut 6 will tilt and protrude from the mounting groove 7. This tilted design causes the movable plate 8 to block the movement path of the nut 6, effectively preventing the nut 6 from loosening or falling off due to vibration or external force during equipment operation. Specifically, the tilted movable plate 8 acts like a "stop," setting a "barrier" in the movement path of the nut 6. This obstruction can only be released under specific operations, thereby achieving the locking function of the nut 6. This design effectively prevents the nut 6 from loosening or falling off. This structure not only ensures a smooth installation process but also improves the stability and reliability of the entire clamp, ensuring a good locking effect under various working conditions.

[0054] Please see Figures 1-5 As shown, each mounting slot 7 has a secondary slot 11 on one side, and each movable plate 8 has a secondary rope 12 connected to its side wall, with the secondary rope 12 passing through the secondary slot 11.

[0055] Furthermore, a main groove 13 is provided inside the support rod 22, which is connected to the auxiliary groove 11. A main rope 14 passes through the main groove 13 and is connected to the auxiliary rope 12. A lifting plate 15 is installed at one end of the main rope 14 outside the main groove 13.

[0056] An oil injection groove 16 is provided on the upper side wall of the bearing rod 22, and the oil injection groove 16 is connected to the main groove 13.

[0057] Through the above technical solution:

[0058] In use, when it is inconvenient or impossible to operate the movable plate 8 by hand, it can be controlled by pulling the lifting plate 15. The specific operation is as follows: Pulling the lifting plate 15 transmits tension through the main rope 14 connected to it. The movement of the main rope 14 further pulls the auxiliary rope 12, which in turn applies tension to the side wall of the movable plate 8. This force transmission allows the movable plate 8 to smoothly enter the mounting slot 7, thereby achieving remote control of the movable plate 8. This design is particularly practical when space is limited or precise control of the movable plate 8's position is required, ensuring ease and flexibility of operation.

[0059] Furthermore, the design of the oil injection groove 16 further enhances the reliability of the entire system. The oil injection groove 16 is connected to the main groove 13 and the auxiliary groove 11, facilitating the injection of lubricating oil into these grooves. By periodically adding lubricating oil to the oil injection groove 16, jamming or wear of the main rope 14 and auxiliary rope 12 during operation can be effectively prevented, ensuring the smooth operation of the rope system. This lubrication mechanism not only extends the service life of the rope but also improves the stability and durability of the entire clamp.

Claims

1. A universal clamp for small-section round teeth, characterized in that, include: A workbench (1) is provided with a base (2) installed on its upper surface. A positioning sleeve (3) is fitted over the base (2). A tooth blank (4) is fitted over the positioning sleeve (3). A gasket (5) is installed between the tooth blank (4) and the base (2). A nut (6) is installed on the upper end of the gasket (5), and the nut (6) is connected to the base (2).

2. The universal fixture for small-section round teeth according to claim 1, characterized in that: The base (2) integrates a bearing plate (21), a bearing rod (22), a mounting plate (23), and a tension threaded hole (24). The bearing rod (22) and the mounting plate (23) are respectively fixed to the two ends of the outer wall of the bearing plate (21). The tension threaded hole (24) is opened on the side wall of the mounting plate (23). The outer surface of the bearing rod (22) is in a mating relationship with the inner wall of the positioning sleeve (3) and the nut (6). The mounting plate (23) is adapted to the positioning surface of the worktable (1).

3. The universal clamp for small-section round teeth according to claim 2, characterized in that: The support rod (22) has multiple mounting slots (7) on its upper side wall. Each mounting slot (7) is movably connected to a movable plate (8). When the movable plate (8) is located in the mounting slot (7), it is coaxial with the support rod (22). Each mounting slot (7) has a receiving slot (9) on its inner wall. Each receiving slot (9) is connected to the side wall of the movable plate (8) by a spring (10).

4. A universal fixture for small-section round teeth according to claim 3, characterized in that: Each of the mounting slots (7) has a secondary slot (11) on one side, and each of the movable plates (8) has a secondary rope (12) connected to its side wall, the secondary rope (12) passing through the secondary slot (11).

5. A universal fixture for small-section round teeth according to claim 4, characterized in that: The support rod (22) has a main groove (13) inside, which is connected to the auxiliary groove (11). A main rope (14) passes through the main groove (13) and is connected to the auxiliary rope (12). A lifting plate (15) is installed at one end of the main rope (14) outside the main groove (13).

6. A universal fixture for small-section round teeth according to claim 5, characterized in that: An oil injection groove (16) is provided on the upper side wall of the bearing rod (22), and the oil injection groove (16) is connected to the main groove (13).

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