A special fixture for numerical control lathe
The hydraulically driven clamping plate sliding and semi-circular block rotation structure solves the problems of wobbling and shape adaptability of CNC lathe fixtures during clamping, achieving stable and flexible workpiece fixation and improving machining accuracy.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HANGZHOU ZHISHENG INTELLIGENT MANUFACTURING CO LTD
- Filing Date
- 2025-08-07
- Publication Date
- 2026-07-07
AI Technical Summary
Existing CNC lathe fixtures are prone to shaking and instability during clamping, and are not convenient for flexibly clamping workpieces of different shapes.
The clamping plate is driven to slide by a hydraulic rod. Combined with the rotating structure of the semicircular block and the clamping block, the clamping plate slides outside the support rod through the hydraulic rod. The semicircular block drives the clamping block to abut against the workpiece and rotate according to the shape of the workpiece, so as to achieve stable clamping.
It improves the stability and flexibility of clamping, can adapt to the clamping requirements of workpieces with different shapes, avoids shaking, and ensures machining accuracy.
Smart Images
Figure CN224464224U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of CNC lathe technology, specifically a special fixture for CNC lathes. Background Technology
[0002] CNC lathe fixtures are tools used to fix and support workpieces on CNC lathes. Their main function is to ensure that the workpiece does not shift or deform during machining, thereby guaranteeing machining accuracy.
[0003] The existing technology has the following defects or problems: The existing technology disclosed in CN214489663U discloses a special fixture for CNC lathes, including a slide rail and a slider that slides and is fixed on the slide rail. A clamping seat is installed on the slider, and a screw is connected to the clamping seat by a motor drive. The motor is controlled to rotate forward and backward by a second switch. The axis of the screw is perpendicular to the direction of movement of the slider. A left-handed slide is screwed to the left side of the screw, and a right-handed slide is screwed to the right side of the screw. The top of the left-handed slide and the right-handed slide are symmetrically provided with V-shaped mounting seats. Rollers are movably connected to the side walls of the two sets of mounting seats in the V-shaped structure.
[0004] During use, the above-mentioned equipment uses rollers on two sets of mutually symmetrical V-shaped mounting bases to support long rotating bodies, preventing them from bending easily when they are long. The two sets of mounting bases moving closer or further apart at the same time are conducive to clamping rotating bodies with different outer diameters, and the movable rollers are prevented from being scratched by the rotating bodies.
[0005] The clamping structure described above relies solely on the threaded rod for clamping during use, which can easily cause the clamp to wobble during clamping, resulting in unstable clamping. Furthermore, it is not convenient to clamp and fix workpieces of different shapes, making it inconvenient to use flexibly.
[0006] Therefore, a special fixture for CNC lathes is proposed to solve the problems mentioned above. Utility Model Content
[0007] To address the shortcomings of existing technologies, this utility model provides a special fixture for CNC lathes. It solves the problems that fixtures relying solely on threaded rods for clamping during use are prone to shaking, resulting in unstable clamping and making it difficult to clamp and fix workpieces of different shapes, thus hindering flexible use.
[0008] To achieve the above objectives, this utility model provides the following technical solution: A base is included, at least two support plates are fixedly connected to the upper surface of the base, a support rod is fixedly connected between the at least two support plates, a sliding sleeve is slidably connected to the outer surface of the support rod, a clamping plate is fixedly connected to the upper surface of the sliding sleeve, a hydraulic rod is fixedly connected to the lower surface of the clamping plate, a fixing plate is fixedly connected to the upper surface of the base, a fixing shaft is fixedly connected to the upper surface of the fixing plate, a sector plate is rotatably connected to the outer surface of the fixing shaft, a first connecting shaft is fixedly connected to both ends of the sector plate, a second connecting shaft is fixedly connected to the upper surface of the clamping plate, and a rotating rod is rotatably connected between the second connecting shaft and the first connecting shaft.
[0009] Preferably, a semicircular block is fixedly connected to the upper surface of the clamping plate, and at least two first limiting grooves are opened inside the semicircular block. At least two rotating blocks are rotatably connected inside the semicircular block.
[0010] Preferably, at least two second limiting grooves are provided inside each of the at least two rotating blocks, and at least two clamping blocks are rotatably connected inside the rotating blocks.
[0011] Preferably, at least two of the clamping blocks are provided with abutment blocks inside, and a second limiting ring is fixedly connected to the outer surface of the clamping block, the second limiting ring being rotatably connected inside the second limiting groove.
[0012] Preferably, a first limiting ring is fixedly connected to the outer surface of the rotating block, and the first limiting ring is rotatably connected inside the first limiting groove.
[0013] Preferably, a fixing frame is fixedly connected to the upper surface of the fixing plate, and the interior of the fixing frame is fixedly connected to the support rod.
[0014] Preferably, the output end of the hydraulic rod is rotatably connected to the upper surface of the fixed plate.
[0015] Compared with the prior art, this utility model provides a special fixture for CNC lathes, which has the following characteristics:
[0016] Beneficial effects:
[0017] 1. By setting up a hydraulic rod, the clamping plate slides outside the support rod under the drive of the hydraulic rod, so that the two semi-circular blocks drive the clamping blocks to fix the workpiece in place. This achieves more stable fixation of the workpiece in the CNC lathe, avoids shaking during the clamping process, and prevents unstable clamping, thereby improving the clamping effect.
[0018] 2. By setting up a clamping block and an abutment block, when the semicircular block drives the abutment block to abut the workpiece, the rotating block and the clamping block will rotate according to the shape of the workpiece, so that the abutment block can clamp the workpiece completely. This enables clamping according to different workpieces and improves the flexibility of use. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0020] Figure 2 This is a schematic diagram of the bottom structure of the clamping plate of this utility model;
[0021] Figure 3 This is a schematic diagram of the upper structure of the fixing plate of this utility model;
[0022] Figure 4 This is a schematic diagram of the internal structure of the semicircular block of this utility model;
[0023] Figure 5 This utility model Figure 4 Enlarged view of point A in the middle.
[0024] In the diagram: 1. Base; 2. Support plate; 3. Support rod; 4. Sliding sleeve; 5. Clamping plate; 6. Hydraulic rod; 7. Fixing plate; 8. Fixing shaft; 9. Sector plate; 10. First connecting shaft; 11. Second connecting shaft; 12. Rotating rod; 13. Semicircular block; 14. First limiting groove; 15. Rotating block; 16. Second limiting groove; 17. Clamping block; 18. Abutting block; 19. First limiting ring; 20. Second limiting ring; 21. Fixing frame. Detailed Implementation
[0025] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.
[0026] 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.
[0027] Example:
[0028] Please see Figure 1 - Figure 5A CNC lathe fixture in this embodiment includes a base 1. At least two support plates 2 are fixedly connected to the upper surface of the base 1. A support rod 3 is fixedly connected between the at least two support plates 2. A sliding sleeve 4 is slidably connected to the outer surface of the support rod 3. A clamping plate 5 is fixedly connected to the upper surface of the sliding sleeve 4. A hydraulic rod 6 is fixedly connected to the lower surface of the clamping plate 5. A fixing plate 7 is fixedly connected to the upper surface of the base 1. A fixing shaft 8 is fixedly connected to the upper surface of the fixing plate 7. A sector plate 9 is rotatably connected to the outer surface of the fixing shaft 8. A first connecting shaft 10 is fixedly connected to both ends of the sector plate 9. A second connecting shaft 11 is fixedly connected to the upper surface of the clamping plate 5. A rotating rod 12 is rotatably connected between the second connecting shaft 11 and the first connecting shaft 10.
[0029] A fixing frame 21 is fixedly connected to the upper surface of the fixing plate 7. The inside of the fixing frame 21 is fixedly connected to the support rod 3. The output end of the hydraulic rod 6 is rotatably connected to the upper surface of the fixing plate 7.
[0030] The hydraulic rod 6 is connected to the upper surface of the fixed plate 7 through its output end. When the hydraulic rod 6 is running, the sliding sleeve 4 drives the clamping plate 5 to slide on the outer surface of the support rod 3, causing the semicircular block 13 to move together. The movement of the clamping plate 5 causes the rotating rod 12 to rotate between the first connecting shaft 10 and the second connecting shaft 11. The sector plate 9 rotates on the outer surface of the fixed shaft 8 to maintain the balance between the two rotating rods 12 and the clamping plate 5. The support rod 3 is fixed by the fixing frame 21 so that the support rod 3 will not shake, thus ensuring the sliding stability of the sliding sleeve 4 and the clamping plate 5.
[0031] At this time, the support plate 2 is fixed by the base 1, and the support rod 3 is supported by the support plate 2.
[0032] A semicircular block 13 is fixedly connected to the upper surface of the clamping plate 5. At least two first limiting grooves 14 are opened inside the semicircular block 13. At least two rotating blocks 15 are rotatably connected inside the semicircular block 13. At least two second limiting grooves 16 are opened inside the at least two rotating blocks 15. At least two clamping blocks 17 are rotatably connected inside the rotating blocks 15.
[0033] At least two clamping blocks 17 are provided with abutment blocks 18 inside. A second limiting ring 20 is fixedly connected to the outer surface of the clamping block 17. The second limiting ring 20 is rotatably connected to the inside of the second limiting groove 16. A first limiting ring 19 is fixedly connected to the outer surface of the rotating block 15. The first limiting ring 19 is rotatably connected to the inside of the first limiting groove 14.
[0034] When the semicircular block 13 moves to the outside of the workpiece, it abuts against the outer surface of the workpiece through the abutting block 18. According to the shape of the workpiece, the abutting block 18 rotates. At the same time, the clamping block 17 and the second limiting ring 20 rotate inside the second limiting groove 16 and the rotating block 15, so that the rotating block 15 and the first limiting ring 19 rotate inside the semicircular block 13 and the first limiting groove 14, thus completely enclosing and clamping the workpiece. The rotation of the first limiting ring 19 and the rotating block 15 is stabilized by the first limiting groove 14, and the rotation of the second limiting ring 20 and the clamping block 17 is stabilized by the second limiting groove 16.
[0035] The working principle of the above embodiment is as follows: When in use, the hydraulic rod 6 at the lower part of the clamping plate 5 is activated, and the output end of the hydraulic rod 6 is connected to the upper surface of the fixed plate 7. When the hydraulic rod 6 is running, the sliding sleeve 4 causes the clamping plate 5 to slide on the outer surface of the support rod 3, causing the semicircular block 13 to move together. The movement of the clamping plate 5 causes the rotating rod 12 to rotate between the first connecting shaft 10 and the second connecting shaft 11. The sector plate 9 rotates on the outer surface of the fixed shaft 8 to maintain the balance between the two rotating rods 12 and the clamping plate 5. The support rod 3 is fixed by the fixing frame 21 so that the support rod 3 will not shake, thus ensuring the sliding stability of the sliding sleeve 4 and the clamping plate 5.
[0036] When the semicircular block 13 moves to the outside of the workpiece, it abuts against the outer surface of the workpiece through the abutting block 18. According to the shape of the workpiece, the abutting block 18 rotates. At the same time, the clamping block 17 and the second limiting ring 20 rotate inside the second limiting groove 16 and the rotating block 15, so that the rotating block 15 and the first limiting ring 19 rotate inside the semicircular block 13 and the first limiting groove 14, thus completely enclosing and clamping the workpiece. The rotation of the first limiting ring 19 and the rotating block 15 is stabilized by the first limiting groove 14, and the rotation of the second limiting ring 20 and the clamping block 17 is stabilized by the second limiting groove 16.
[0037] The support plate 2 is fixed by the base 1, and the support rod 3 is supported by the support plate 2.
[0038] The installation, connection, or setting methods disclosed in this embodiment are all common mechanical connection methods. As long as they can achieve their beneficial effects, they can be implemented. Therefore, this embodiment will not elaborate on their specific structural composition and working principle.
[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A special fixture for CNC lathes, characterized in that: The system includes a base (1), at least two support plates (2) are fixedly connected to the upper surface of the base (1), a support rod (3) is fixedly connected between the at least two support plates (2), a sliding sleeve (4) is slidably connected to the outer surface of the support rod (3), a clamping plate (5) is fixedly connected to the upper surface of the sliding sleeve (4), a hydraulic rod (6) is fixedly connected to the lower surface of the clamping plate (5), a fixing plate (7) is fixedly connected to the upper surface of the base (1), a fixing shaft (8) is fixedly connected to the upper surface of the fixing plate (7), a fan-shaped plate (9) is rotatably connected to the outer surface of the fixing shaft (8), a first connecting shaft (10) is fixedly connected to both ends of the fan-shaped plate (9), a second connecting shaft (11) is fixedly connected to the upper surface of the clamping plate (5), and a rotating rod (12) is rotatably connected between the second connecting shaft (11) and the first connecting shaft (10).
2. The special fixture for CNC lathes according to claim 1, characterized in that: The upper surface of the clamp (5) is fixedly connected to a semi-circular block (13), and at least two first limiting grooves (14) are opened inside the semi-circular block (13). At least two rotating blocks (15) are rotatably connected inside the semi-circular block (13).
3. A special fixture for CNC lathes according to claim 2, characterized in that: At least two of the rotating blocks (15) have at least two second limiting grooves (16) inside, and at least two clamping blocks (17) are rotatably connected inside the rotating blocks (15).
4. A special fixture for CNC lathes according to claim 3, characterized in that: At least two of the clamping blocks (17) are provided with abutment blocks (18) inside. A second limiting ring (20) is fixedly connected to the outer surface of the clamping block (17), and the second limiting ring (20) is rotatably connected inside the second limiting groove (16).
5. A special fixture for CNC lathes according to claim 2, characterized in that: The outer surface of the rotating block (15) is fixedly connected to a first limiting ring (19), which is rotatably connected inside the first limiting groove (14).
6. A special fixture for CNC lathes according to claim 1, characterized in that: A fixing frame (21) is fixedly connected to the upper surface of the fixing plate (7), and the interior of the fixing frame (21) is fixedly connected to the support rod (3).
7. A special fixture for CNC lathes according to claim 1, characterized in that: The output end of the hydraulic rod (6) is rotatably connected to the upper surface of the fixed plate (7).