A precision high-speed internal thread grinder

Abstract

The application discloses a precision high-speed internal thread grinder, and relates to the field of machining, comprising a U-shaped frame and a grinding head, wherein the U-shaped frame is provided with a clamping assembly for fixing workpieces of different sizes and a fixing assembly for fixing and connecting different types of grinding heads; the fixing assembly comprises a gas cylinder fixedly connected to the top end of the U-shaped frame; the application is provided through cooperation of structures such as a connecting seat, a first gear and a first toothed plate; during use, workpieces of different sizes are clamped through the clamping assembly, then, according to the different sizes of the workpieces, a connecting block with a matched grinding head is inserted into a connecting groove, the first toothed plate is engaged with the first gear, the first gear is unable to rotate through a locking assembly, the first toothed plate is fixed, the connecting block is installed, and the problem that, when the grinding head is replaced, the fixed bolt and a plurality of reinforcing bolts need to be rotated, the grinding rod is fixedly connected with the cross block and the reinforcing plate, and the grinding rod cannot be quickly replaced, thereby reducing work efficiency, is avoided.

Description

Technical Field

[0001] This application relates to the field of machining, and in particular to a precision high-speed internal thread grinding machine. Background Technology

[0002] Planetary ball screws and nuts, as high-precision transmission components, are widely used in CNC machine tools, automation equipment, and other fields. Their high transmission efficiency and accurate positioning ensure stable operation and precise control of equipment. However, machining the internal threads of planetary ball screw nuts is quite challenging, requiring highly sophisticated machining equipment and processes.

[0003] The invention patent with announcement number CN119747766A proposes a vertical internal thread grinding machine, including a machining bed, a planetary ball screw nut blank, and a fixed frame fixedly mounted on the machining bed. A material transfer and fixing mechanism is provided at the center of the bottom of the fixed frame, and a grinding mechanism is provided at the top of the fixed frame. The material transfer and fixing mechanism includes a rotating disk rotatably connected to the bottom of the fixed frame, and an installation groove is provided at the bottom of the fixed frame.

[0004] The vertical internal thread grinding machine described above requires rotating the fixing bolts and multiple reinforcing bolts to fix the grinding rod to the cross block and reinforcing plate when changing the grinding head, which makes it impossible to change quickly and reduces work efficiency. Utility Model Content

[0005] To address the aforementioned problems, this application provides a precision high-speed internal thread grinding machine.

[0006] This application provides a precision high-speed internal thread grinding machine using the following technical solution:

[0007] A precision high-speed internal thread grinding machine includes a U-shaped frame and a grinding head. The U-shaped frame is provided with a clamping assembly for fixing workpieces of different sizes and a fixing assembly for fixing and connecting different types of grinding heads. The fixing assembly includes a cylinder fixedly connected to the top of the U-shaped frame. The output end of the cylinder passes through the U-shaped frame and is fixedly connected to a connecting seat. A connecting groove is opened at the bottom end of the connecting seat. A through groove communicating with the connecting groove is opened on one side wall of the connecting seat. A plurality of first gears are rotatably connected in the through groove. A connecting block is slidably arranged in the connecting groove. A first toothed plate that meshes with the first gears is fixedly connected to one side wall of the connecting block. A grinding rod is fixedly connected to the bottom end of the connecting block. The grinding head is fixedly connected to the side wall of the grinding rod away from the connecting block.

[0008] By adopting the above technical solution, during use, workpieces of different sizes are clamped by the clamping assembly. Then, according to the different sizes of the workpieces, the connecting block with the matching grinding head is inserted into the connecting groove, so that the first toothed plate meshes with the first gear. Then, the locking assembly prevents the first gear from rotating, fixing the first toothed plate and installing the connecting block. This avoids the problem of needing to rotate the fixing bolts and multiple reinforcing bolts to fix the grinding rod to the cross block and reinforcing plate when changing the grinding head, which makes it difficult to change quickly and reduces work efficiency.

[0009] Preferably, the locking assembly includes a second toothed plate disposed on one side of the connecting seat, with fixing blocks fixedly connected to both ends of one side wall of the second toothed plate, and fixing slots opened above and below the through groove on one side wall of the connecting seat, with the fixing blocks respectively inserted into the fixing slots, the second toothed plate meshing with a plurality of first gears, and two fixing rods disposed at the top of the connecting seat, the bottom ends of the fixing rods passing through the connecting seat, and the fixing blocks respectively sleeved on the fixing rods.

[0010] By adopting the above technical solution, when changing the grinding head, the fixing rod is pulled out, causing the fixing block to move in the fixing groove, which in turn moves the second toothed plate, disengaging the second toothed plate from the first gear and causing the first gear to rotate. The connecting block can then be pulled out from the connecting groove, and then a connecting block with different grinding heads can be inserted. After inserting the connecting block, the second toothed plate is pushed to mesh with the first gear, causing the fixing block to be inserted into the fixing groove. Finally, the fixing rod is inserted.

[0011] Preferably, the clamping assembly includes a placement block rotatably connected to the upper surface of the U-shaped frame and located below the grinding rod. The upper surface of the placement block has four cross-shaped moving grooves, each containing a threaded rod rotatably connected to and a clamping plate slidably connected to. The clamping plates are threadedly connected to the threaded rods, and a second gear is fixedly connected to one end of each threaded rod that is far apart from the other. A fixing ring is fixedly connected to the upper surface of the placement block, and a toothed ring is rotatably connected to the inner wall of the fixing ring. The toothed ring meshes with the second gear.

[0012] By adopting the above technical solution, the workpiece is placed on the placement block, so that the clamping plates are located on the four sides of the workpiece. Then, by rotating the gear ring, the gear ring drives the second gear to rotate, so that multiple threaded rods rotate simultaneously, bringing multiple clamping plates closer to each other, which facilitates clamping workpieces of different sizes.

[0013] Preferably, a guide rod is fixedly connected to the top wall of the connecting groove, and a guide hole adapted to the guide rod is opened at the top of the connecting block.

[0014] By adopting the above technical solution, when the connecting block is inserted into the connecting groove, the guide rod is inserted into the guide hole, which can improve the stability of the connecting block and prevent shaking.

[0015] Preferably, each of the fixing grooves is provided with a plurality of springs arranged at equal intervals, and the two ends of the springs are respectively fixedly connected to the fixing block and the side wall of the fixing groove.

[0016] By adopting the above technical solution, when the fixing block is inserted into the fixing slot, the spring contracts. When the fixing rod is pulled out, the spring can push the fixing block out of the fixing slot, making it easy to remove the connecting block from the connecting slot, while preventing the second toothed plate from falling off.

[0017] Preferably, each spring is provided with a positioning rod, one end of which is fixedly connected to the side wall of the fixing groove, and the other end of which abuts against the fixing block.

[0018] By adopting the above technical solution, when the fixing block is inserted into the fixing slot, the fixing block abuts against the positioning rod, which can prevent the fixing block from being pushed in too much or too little, and facilitates the fixing rod to pass through the fixing block when it is inserted.

[0019] In summary, this application includes at least one of the following beneficial technical effects:

[0020] 1. This application utilizes the cooperative arrangement of structures such as the connecting seat, the first gear, and the first toothed plate. In use, workpieces of different sizes are clamped by the clamping assembly. Then, according to the different sizes of the workpieces, the connecting block with the matching grinding head is inserted into the connecting groove, so that the first toothed plate meshes with the first gear. Then, the locking assembly prevents the first gear from rotating, fixing the first toothed plate and installing the connecting block. This avoids the problem of needing to rotate the fixing bolts and multiple reinforcing bolts to fix the grinding rod to the cross block and reinforcing plate when changing the grinding head, which makes it difficult to change quickly and reduces work efficiency.

[0021] 2. By placing the workpiece on the placement block, the clamping plates are positioned on all four sides of the workpiece. Then, by rotating the gear ring, the gear ring drives the second gear to rotate, causing multiple threaded rods to rotate simultaneously. This brings multiple clamping plates closer together, making it convenient to clamp workpieces of different sizes. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of a precision high-speed internal thread grinding machine according to an embodiment of this application;

[0023] Figure 2 This is a schematic diagram illustrating the main structure of the connector in the embodiments of this application;

[0024] Figure 3This is a schematic diagram illustrating the internal structure of the connector, which is a key feature of this application.

[0025] Figure 4 The embodiments of this application mainly embody Figure 3 A schematic diagram of the enlarged structure of region A in the middle;

[0026] Figure 5 This is a schematic diagram illustrating the placement block structure, which is the main feature of this application embodiment.

[0027] Reference numerals: 1. U-shaped frame; 2. Grinding head; 3. Cylinder; 4. Connecting seat; 5. Connecting groove; 6. Through groove; 7. First gear; 8. Connecting block; 9. First toothed plate; 10. Grinding rod; 11. Second toothed plate; 12. Fixing block; 13. Fixing groove; 14. Fixing rod; 15. Placement block; 16. Moving groove; 17. Threaded rod; 18. Clamping plate; 19. Second gear; 20. Fixing ring; 21. Gear ring; 22. Guide rod; 23. Guide hole; 24. Spring; 25. Positioning rod. Detailed Implementation

[0028] The following is in conjunction with the appendix Figures 1-5 This application will be described in further detail.

[0029] This application discloses a precision high-speed internal thread grinding machine.

[0030] Reference Figure 1 , Figure 2 and Figure 3 A precision high-speed internal thread grinding machine includes a U-shaped frame 1 and multiple grinding heads 2 of different types. The U-shaped frame 1 is provided with a clamping assembly for fixing workpieces of different sizes and a fixing assembly for fixing and connecting different types of grinding heads 2. The fixing assembly includes a cylinder 3, a connecting seat 4, a connecting groove 5, a through groove 6, a first gear 7, a connecting block 8, a first toothed plate 9, and a grinding rod 10.

[0031] Cylinder 3 is fixedly connected to the top of U-shaped frame 1. The output end of cylinder 3 passes through U-shaped frame 1 and is fixedly connected to connecting seat 4. Connecting groove 5 is opened at the bottom of connecting seat 4. Through groove 6 is connected to one side wall of connecting seat 4 and communicates with connecting groove 5. Multiple first gears 7 are provided and are rotatably connected in through groove 6 and are distributed at equal intervals. Multiple connecting blocks 8 are provided. The top of connecting block 8 is slidably set in connecting groove 5. First tooth plate 9 is fixedly connected to one side wall of connecting block 8 and meshes with multiple first gears 7. Multiple grinding rods 10 are provided and are fixedly connected to the bottom of connecting block 8. Different types of grinding heads 2 are fixedly connected to the side wall of grinding rod 10 away from connecting block 8. Connecting seat 4 is provided with locking components to prevent the first gears 7 from rotating.

[0032] Reference Figure 2 , Figure 3 and Figure 4 The locking assembly includes a second toothed plate 11 disposed on one side of the connecting seat 4. Fixing blocks 12 are fixedly connected to both ends of one side wall of the second toothed plate 11. Fixing grooves 13 are opened above and below the through groove 6 on one side wall of the connecting seat 4. The fixing blocks 12 are respectively inserted into the fixing grooves 13. The second toothed plate 11 meshes with multiple first gears 7. Two fixing rods 14 are provided at the top of the connecting seat 4. The bottom ends of the fixing rods 14 penetrate the connecting seat 4, and the fixing blocks 12 are respectively sleeved on the fixing rods 14. When changing the grinding head 2, by pulling out the fixing rods 14, the fixing blocks 12 move in the fixing grooves 13, driving the second toothed plate 11 to move, so that the second toothed plate 11 disengages from the first gears 7, and the first gears 7 rotate. The connecting block 8 can be pulled out from the connecting groove 5, and then the connecting block 8 with different grinding heads 2 can be inserted. After the connecting block 8 is inserted, the second toothed plate 11 is pushed to mesh with the first gears 7, so that the fixing blocks 12 are inserted into the fixing grooves 13. Then the fixing rods 14 are inserted.

[0033] Reference Figure 1 and Figure 5 The clamping assembly includes a placement block 15 rotatably connected to the upper surface of the U-shaped frame 1 and located below the grinding rod 10. A motor (not shown in the figure) is installed at the bottom of the U-shaped frame 1 to drive the placement block 15 to rotate. The upper surface of the placement block 15 has four cross-shaped moving grooves 16. Each moving groove 16 is rotatably connected to a threaded rod 17, and each moving groove 16 is slidably connected to a clamping plate 18. The clamping plates 18 are threadedly connected to the threaded rods 17 respectively. The ends of the threaded rods 17 that are far apart from each other are fixedly connected to a second gear 19. A fixing ring 20 is fixedly connected to the upper surface of the placement block 15. A toothed ring 21 is rotatably connected to the inner wall of the fixing ring 20. The toothed ring 21 meshes with the second gear 19 respectively. By placing the workpiece on the placement block 15, the clamping plates 18 are located on the four sides of the workpiece. Then, by rotating the toothed ring 21, the toothed ring 21 drives the second gear 19 to rotate, causing multiple threaded rods 17 to rotate simultaneously, bringing multiple clamping plates 18 closer together, which is convenient for clamping workpieces of different sizes.

[0034] Reference Figure 3 A guide rod 22 is fixedly connected to the top wall of the connecting groove 5. A guide hole 23 adapted to the guide rod 22 is opened at the top of the connecting block 8. When the connecting block 8 is inserted into the connecting groove 5, the guide rod 22 is inserted into the guide hole 23, which can improve the stability of the connecting block 8 and prevent shaking.

[0035] Reference Figure 3 and Figure 4Multiple springs 24 are provided in the fixing groove 13 at equal intervals. The two ends of the springs 24 are fixedly connected to the fixing block 12 and the side wall of the fixing groove 13, respectively. When the fixing block 12 is inserted into the fixing groove 13, the springs 24 are contracted. When the fixing rod 14 is pulled out, the fixing block 12 can be pushed out of the fixing groove 13 by the springs 24, which makes it easy to remove the connecting block 8 from the connecting groove 5, and at the same time prevents the second toothed plate 11 from falling off.

[0036] Reference Figure 4 Each spring 24 is equipped with a positioning rod 25. One end of the positioning rod 25 is fixedly connected to the side wall of the fixing groove 13, and the other end of the positioning rod 25 abuts against the fixing block 12. When the fixing block 12 is inserted into the fixing groove 13, the fixing block 12 abuts against the positioning rod 25, which can prevent the fixing block 12 from being pushed in too much or too little, and facilitates the insertion of the fixing rod 14 through the fixing block 12.

[0037] The implementation principle of a precision high-speed internal thread grinding machine according to an embodiment of this application is as follows: In use, the workpiece is placed on the placement block 15, with the clamping plates 18 positioned on all four sides of the workpiece. Then, by rotating the gear ring 21, the gear ring 21 drives the second gear 19 to rotate, causing multiple thread rods 17 to rotate simultaneously. This brings the multiple clamping plates 18 closer together, clamping workpieces of different sizes. Then, depending on the size of the workpiece, by pulling out the fixing rod 14, the fixing block 12 moves in the fixing groove 13, driving the second gear plate 11 to move, disengaging the second gear plate 11 from the first gear 7, and causing the first gear... 7. Rotate to pull the connecting block 8 out of the connecting groove 5. Then, insert the connecting block 8 with the grinding head 2 that is adapted to the workpiece size into the connecting groove 5. Then, push the second tooth plate 11 to mesh with the first gear 7, so that the fixing block 12 is inserted into the fixing groove 13. Then, insert the fixing rod 14 to fix the second tooth plate 11 and lock the first gear 7. Different grinding heads 2 can be replaced. This avoids the problem of needing to rotate the fixing bolts and multiple reinforcing bolts to fix the grinding rod 10 to the cross block and reinforcing plate when replacing the grinding head 2, which makes it difficult to replace quickly and reduces work efficiency.

[0038] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A precision high-speed internal thread grinding machine, comprising a U-shaped frame (1) and a grinding head (2), wherein the U-shaped frame (1) is provided with a clamping assembly for fixing workpieces of different sizes and a fixing assembly for fixing and connecting different types of grinding heads (2), characterized in that: The fixing component includes a cylinder (3) fixedly connected to the top of the U-shaped frame (1). The output end of the cylinder (3) passes through the U-shaped frame (1) and is fixedly connected to a connecting seat (4). A connecting groove (5) is provided at the bottom of the connecting seat (4). A through groove (6) communicating with the connecting groove (5) is provided on one side wall of the connecting seat (4). Multiple first gears (7) are rotatably connected in the through groove (6). A connecting block (8) is slidably arranged in the connecting groove (5). A first tooth plate (9) meshing with multiple first gears (7) is fixedly connected to one side wall of the connecting block (8). A grinding rod (10) is fixedly connected to the bottom of the connecting block (8). The grinding head (2) is fixedly connected to the side wall of the grinding rod (10) away from the connecting block (8). A locking component for preventing the first gears (7) from rotating is provided on the connecting seat (4).

2. The precision high-speed internal thread grinding machine according to claim 1, characterized in that: The locking assembly includes a second toothed plate (11) disposed on one side of the connecting seat (4). Fixing blocks (12) are fixedly connected to both ends of one side wall of the second toothed plate (11). Fixing grooves (13) are provided on one side wall of the connecting seat (4) above and below the through groove (6). The fixing blocks (12) are respectively inserted into the fixing grooves (13). The second toothed plate (11) meshes with a plurality of first gears (7). Two fixing rods (14) are provided at the top of the connecting seat (4). The bottom ends of the fixing rods (14) all penetrate the connecting seat (4), and the fixing blocks (12) are respectively sleeved on the fixing rods (14).

3. A precision high-speed internal thread grinding machine according to claim 2, characterized in that: The clamping assembly includes a placement block (15) rotatably connected to the upper surface of the U-shaped frame (1) and located below the grinding rod (10). The upper surface of the placement block (15) is provided with four cross-shaped moving grooves (16). Each moving groove (16) is rotatably connected with a threaded rod (17). Each moving groove (16) is slidably connected with a clamping plate (18). The clamping plate (18) is threadedly connected to the threaded rod (17).

4. A precision high-speed internal thread grinding machine according to claim 3, characterized in that: The threaded rod (17) is fixedly connected to a second gear (19) at one end away from each other. A fixing ring (20) is fixedly connected to the upper surface of the placement block (15). A toothed ring (21) is rotatably connected to the inner wall of the fixing ring (20). The toothed ring (21) meshes with the second gear (19).

5. A precision high-speed internal thread grinding machine according to claim 4, characterized in that: The top wall of the connecting groove (5) is fixedly connected to a guide rod (22), and the top of the connecting block (8) is provided with a guide hole (23) that matches the guide rod (22).

6. A precision high-speed internal thread grinding machine according to claim 5, characterized in that: Each of the fixing grooves (13) is provided with a plurality of springs (24) arranged at equal intervals, and the two ends of the springs (24) are fixedly connected to the fixing block (12) and the side wall of the fixing groove (13) respectively.

7. A precision high-speed internal thread grinding machine according to claim 6, characterized in that: Each spring (24) is provided with a positioning rod (25). One end of the positioning rod (25) is fixedly connected to the side wall of the fixing groove (13), and the other end of the positioning rod (25) abuts against the fixing block (12).

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