A pneumatic clamp for CNC machine tool production of workpieces
By converting the cylinder power into the movement of the clamping rod through the transmission plate, the jamming problem caused by the elastic component driving the clamping component in traditional pneumatic clamps is solved, thus achieving smoothness and reliability of the clamp.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENYANG JITAI HENGDA AUTOMATION EQUIP CO LTD
- Filing Date
- 2025-06-26
- Publication Date
- 2026-05-26
AI Technical Summary
Traditional pneumatic clamps require additional elastic components to drive the clamping components away from the workpiece after processing. This reciprocating opening and closing stroke can easily lead to failure of the elastic components, causing the clamp to jam.
The power of the cylinder is converted into the movement of the clamping rod by a transmission plate. The workpiece is clamped and released by the cooperation of the clamping rod and the guide plate, which avoids the need for additional elastic parts and ensures the smoothness of the fixture.
It avoids the failure of elastic components during long-term reciprocating motion, ensures the smooth operation of the fixture, and improves the reliability and service life of the fixture.
Smart Images
Figure CN224274241U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of pneumatic clamping technology, specifically to a pneumatic clamping fixture for CNC machine tool production of workpieces. Background Technology
[0002] Pneumatic clamps are clamping devices that use compressed air as a power source. They achieve rapid clamping and release of workpieces through a cylinder-driven mechanical structure. Widely used in machining, automated production lines, and assembly, their core advantages lie in their fast response speed, stable clamping force, and overload protection – automatically releasing pressure to protect the workpiece in case of abnormal air pressure. Traditional pneumatic clamps apply clamping force through cylinders. After workpiece processing is complete, an additional elastic component is needed to move the clamping mechanism away from the workpiece. However, the reciprocating opening and closing strokes can easily cause this additional elastic component to fail, leading to clamp jamming. Utility Model Content
[0003] The purpose of this utility model is to provide a pneumatic clamp for CNC machine tool production, in order to solve the problem mentioned in the background art that the traditional pneumatic clamp applies clamping force through a cylinder. After the workpiece is processed, an additional elastic component is needed to drive the clamping component away from the workpiece. However, the reciprocating opening and closing stroke can easily cause the additional elastic component to fail, resulting in the clamp running stuck.
[0004] To achieve the above objectives, this utility model provides the following technical solution: a pneumatic clamp for CNC machine tool workpiece production, comprising a base plate, a transmission seat fixedly connected to one side of the upper surface of the base plate by bolts, a through groove opened in the front-back direction and extending downwards inside the transmission seat, a limiting groove opened in the middle of the inner side wall of the transmission seat, the limiting groove communicating with the through groove, a clamping rod slidably connected inside the limiting groove, a transmission wheel rotatably connected to one end of the clamping rod above and below and inside the transmission seat by bearings, a guide plate provided inside the through groove and at the upper and lower ends of the clamping rod, a guide groove opened on the guide plate, the transmission wheel rollingly connected to the inside of the guide groove, a clamping seat fixedly connected to the other side of the upper surface of the base plate by bolts, and clamping plates being bolted to the inner ends of the clamping seat and the clamping rod.
[0005] Preferably, the upper surface of the base plate is provided with a support protrusion at a position corresponding to the limiting groove. The support protrusion extends into the interior of the limiting groove and abuts against the lower surface of the clamping rod. The clamping rod is slidably connected to the limiting groove and the support protrusion.
[0006] Preferably, there are two guide plates, and a clamping connecting seat is bolted to the front of the two guide plates, and an end plate is bolted to the rear of the two guide plates.
[0007] Preferably, the guide groove is set at a 27° angle with the long side of the guide plate, and the front and rear ends of the two guide plates extend to the outside of the transmission seat through the through groove.
[0008] Preferably, the base plate is a cuboid plate structure, and the supporting protrusion is integrally formed with the base plate through a cutting process.
[0009] Compared with the prior art, the beneficial effects of this utility model are: it replaces the traditional pneumatic clamping fixture that applies clamping force through a cylinder and drives the clamping component to leave the workpiece through the force of an additional elastic component. The power of the cylinder is converted into the movement of the clamping rod to clamp the workpiece through the transmission plate. After the workpiece is processed, the power of the cylinder is converted into the movement of the clamping rod to leave the workpiece again through the transmission plate. After a long period of reciprocating opening and closing strokes, the failure of the additional elastic component is avoided, ensuring the smooth operation of the clamping fixture. Attached Figure Description
[0010] Figure 1 This is an isometric view of the main structure of this utility model;
[0011] Figure 2 This is an isometric sectional view of the main structure of this utility model;
[0012] Figure 3 This is an isometric dissection diagram of the main structure of this utility model;
[0013] Figure 4 This is a front view schematic diagram of the main structure of this utility model;
[0014] Figure 5 This is a top view of the main structure of this utility model.
[0015] In the figure: 1-base plate, 2-transmission seat, 3-through groove, 4-limiting groove, 5-clamping rod, 6-transmission wheel, 7-guide plate, 8-guide groove, 9-clamping seat, 10-clamping plate, 11-support protrusion, 12-clamping connecting seat, 13-end plate. Detailed Implementation
[0016] 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.
[0017] Please see Figure 1-5This utility model provides a pneumatic clamping fixture for CNC machine tool production, including a base plate 1. A transmission seat 2 is fixedly connected to one side of the upper surface of the base plate 1 by bolts. A through groove 3 is formed inside the transmission seat 2 in the front-to-back direction and extending downward. A limiting groove 4 is formed in the middle of the inner side wall of the transmission seat 2. The limiting groove 4 is connected to the through groove 3. A clamping rod 5 is slidably connected inside the limiting groove 4. A transmission wheel 6 is rotatably connected to one end of the clamping rod 5 above and below and inside the transmission seat 2 by bearings. A guide plate 7 is provided inside the through groove 3 and at the upper and lower ends of the clamping rod 5. A guide groove 8 is formed on the guide plate 7. The transmission wheel 6 is rotatably connected to the inside of the guide groove 8. A clamping seat 9 is fixedly connected to the other side of the upper surface of the base plate 1 by bolts. A clamping plate 10 is bolted to both the clamping seat 9 and the inner end of the clamping rod 5.
[0018] In use, the base plate 1 is fixed to the CNC machine tool processing platform by passing bolts through the base plate 1 and setting corresponding openings on the base plate 1. The movable end of the cylinder is connected to two guide plates 7 through the connecting component. The workpiece to be clamped and fixed is placed between the two clamping plates 10 on the base plate 1. The cylinder drives the guide plate 7 to move in the through groove 3 inside the transmission seat 2. The clamping rod 5 is rolled and connected to the guide groove 8 on the guide plate 7 through the transmission wheel 6. When the guide plate 7 moves, the rolling connection between the transmission wheel 6 and the guide groove 8 drives the clamping rod 5 to move inside the limiting groove 4, thereby driving the clamping plate 10 and the clamping plate 10 on the clamping seat 9 to clamp and fix the workpiece. After the processing is completed, the cylinder moves in the opposite direction, so that the clamping rod 5 drives the clamping plate 10 away from the workpiece, so that the workpiece can be loosened and disassembled.
[0019] The upper surface of the base plate 1 is provided with a support protrusion 11 at the position corresponding to the limiting groove 4. The support protrusion 11 extends into the interior of the limiting groove 4 and abuts against the lower surface of the clamping rod 5. The clamping rod 5 is slidably connected to the limiting groove 4 and the support protrusion 11. By providing the support protrusion 11 on the base plate 1, the lower end of the clamping rod 5 is supported, and the installation and disassembly of the specific components of the overall pneumatic clamp are convenient.
[0020] There are two guide plates 7. A clamping connecting seat 12 is bolted between the front sides of the two guide plates 7. The clamping connecting seat 12 connects the two guide plates 7 to the movable end of the cylinder. An end plate 13 is bolted between the rear sides of the two guide plates 7. The end plate 13 fixes the rear sides of the two guide plates 7.
[0021] The guide groove 8 and the long side of the guide plate 7 are set at a 27° angle. The front and rear ends of the two guide plates 7 extend to the outside of the transmission seat 2 through the through groove 3, so that when the cylinder drives the guide plate 7 to move in the through groove 3 inside the transmission seat 2, it can drive the clamping rod 5 to move inside the limiting groove 4.
[0022] The base plate 1 is a cuboid plate structure, and the support protrusion 11 is integrally formed with the base plate 1 through a cutting process, thereby improving the connection strength between the support protrusion 11 and the base plate 1.
[0023] 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 pneumatic clamping fixture for producing workpieces on a CNC machine tool, characterized in that: The device includes a base plate (1), on one side of the upper surface of the base plate (1) a transmission seat (2) is fixedly connected by bolts. The transmission seat (2) has a through groove (3) extending from the front to the back and down. A limiting groove (4) is opened in the middle of the inner side wall of the transmission seat (2). The limiting groove (4) is connected to the through groove (3). A clamping rod (5) is slidably connected inside the limiting groove (4). A transmission wheel (6) is rotatably connected to one end of the clamping rod (5) above and below and inside the transmission seat (2) by bearings. A guide plate (7) is provided inside the through groove (3) and at the upper and lower ends of the clamping rod (5). A guide groove (8) is opened on the guide plate (7). The transmission wheel (6) is rotatably connected to the inside of the guide groove (8). A clamping seat (9) is fixedly connected to the other side of the upper surface of the base plate (1) by bolts. A clamping plate (10) is bolted to both the clamping seat (9) and the inner end of the clamping rod (5).
2. The pneumatic fixture for CNC machine tool workpiece production according to claim 1, characterized in that: The upper surface of the base plate (1) is provided with a support protrusion (11) at the position corresponding to the limiting groove (4). The support protrusion (11) extends into the interior of the limiting groove (4) and abuts against the lower surface of the clamping rod (5). The clamping rod (5) is slidably connected to the limiting groove (4) and the support protrusion (11).
3. The pneumatic fixture for producing workpieces on a CNC machine tool according to claim 1, characterized in that: There are two guide plates (7). A clamping connecting seat (12) is bolted between the two guide plates (7) on the front side, and an end plate (13) is bolted between the two guide plates (7) on the rear side.
4. A pneumatic fixture for producing workpieces on a CNC machine tool according to claim 1, characterized in that: The guide groove (8) is set at a 27° angle with the long side of the guide plate (7), and the front and rear ends of the two guide plates (7) extend to the outside of the transmission seat (2) through the through groove (3).
5. A pneumatic fixture for producing workpieces on a CNC machine tool according to claim 2, characterized in that: The base plate (1) is a rectangular plate structure, and the supporting protrusion (11) is integrally formed with the base plate (1) through a cutting process.