Anti-pinching claw structure for CNC lathe for processing plastics

Abstract

The invention provides an anti-pinching claw structure of a numerically controlled lathe for processing plastics, which relates to the technical field of plastic processing equipment and comprises a claw plate, wherein fixed cylinders are evenly and equidistantly fixedly installed inside the claw plate, four side walls of the fixed cylinders are each provided with a first slide groove, a mounting frame is fixedly installed on the side wall of the claw plate, a driving motor is fixedly installed in the inner wall of the claw plate, a fixing bar is fixedly installed on the output shaft of the driving motor, and a fixed plate is fixedly installed on the side wall of the claw plate away from the mounting frame; an adjusting mechanism is slidably installed inside the four first slide grooves; the adjusting mechanism comprises an inner cylinder, four inner cylinders are respectively slidably installed in the four first slide grooves, connecting rods are arranged between the four inner cylinders, and the slide frame can be moved inside the clamping plate according to the size of the plastic product to be grasped before grasping, so that the clamping plate has a rebound space when grasping the plastic product, effectively avoiding hard contact between the claw and the plastic product to cause damage, and enhancing the service life of the claw.

Description

Technical Field

[0001] The invention belongs to the technical field of plastic processing equipment, and more specifically, particularly relates to an anti-pinching claw structure of a numerically controlled lathe for processing plastics. Background Art

[0002] Plastic processing, also known as plastic molding processing, is a general term for various processes that convert synthetic resins or plastics into plastic products. Plastic processing generally includes plastic batching, molding, machining, joining, modification and assembly. The last four processes are carried out after the plastic has been molded into finished products or semi-finished products, also known as plastic secondary processing.

[0003] However, the anti-pinching jaws of the existing CNC lathes for processing plastics still have the following shortcomings when used:

[0004] 1. Existing clamps usually adopt a fixed clamp structure and gripping method, which is difficult to adapt to plastic products of different shapes and sizes. During the gripping process, due to the limited and uneven contact area between the clamp and the plastic product, it is easy to cause local pressure concentration, resulting in clamp marks and even damage to the plastic product, affecting product quality;

[0005] 2. When the working gripper is damaged, the equipment often needs to be shut down for replacement, which not only wastes production time and reduces production efficiency, but may also affect the stability and continuity of the entire production line due to frequent shutdowns.

[0006] Therefore, in view of this, the existing structure and defects are studied and improved, and an anti-pinching claw structure of a CNC lathe for processing plastics is provided. Summary of the invention

[0007] In order to solve the above technical problems, the present invention provides an anti-pinching claw structure for a CNC lathe for processing plastics to solve the above problems.

[0008] A clamping claw structure for preventing pinch marks of a CNC lathe for processing plastics, comprising a clamping claw plate, wherein fixed cylinders are evenly and equidistantly fixedly installed inside the clamping claw plate, and first slide grooves are provided on the side walls of the four fixed cylinders, and a mounting frame is fixedly installed on the side wall of the clamping claw plate, and a driving motor is fixedly installed in the inner wall of the clamping claw plate, and a fixing strip is fixedly installed on the output shaft of the driving motor, and a fixing plate is fixedly installed on the side wall of the clamping claw plate away from the mounting frame;

[0009] An adjustment mechanism is slidably installed inside each of the four first slide grooves;

[0010] The adjustment mechanism comprises an inner cylinder, four inner cylinders are slidably mounted in four first sliding grooves respectively, connecting rods are arranged between two of the four inner cylinders, and the four inner cylinders are hinged together two by two through the four connecting rods.

[0011] Preferably, slots are provided on the side walls of the four inner cylinders, first screws are fixedly installed in the inner walls of the four slots, and first threaded rings are threadedly installed on the four first screws.

[0012] Preferably, the four first screw rods are sleeved with a first spring, the four first springs are respectively fixedly installed in the inner walls of the four slots, and the upper ends of the four first springs are fixedly installed with a pressure plate, which is respectively sleeved on the four first screw rods.

[0013] Preferably, the four slots are all inserted with mounting rods, the upper and lower ends of the four mounting rods are symmetrically provided with mounting grooves, and the upper and lower ends of the four mounting rods are all fixedly installed with fixing blocks.

[0014] Preferably, the four groups of fixed blocks are all fixedly installed with second screws, both ends of the four groups of second screws are threadedly installed with threaded barrels, and the eight groups of threaded barrels are all threadedly installed with second threaded rings.

[0015] Preferably, U-shaped frames are inserted into the four groups of installation grooves, and inner grooves are symmetrically opened on the four U-shaped frames, and the four groups of inner grooves are adapted to the threaded barrels.

[0016] Preferably, heat dissipation holes are opened inside the four U-shaped frames, and a clamping plate is provided on one side of the four U-shaped frames close to the middle of the clamping claw plate. The third screws are symmetrically fixedly installed on the four clamping plates, and the third threaded rings are threadedly installed on the four groups of the third screws.

[0017] Preferably, a second spring is fixedly installed between the four U-shaped frames and the clamps, four groups of the second springs are respectively mounted on four groups of third screws, L-shaped grooves are symmetrically opened on the four clamps, and a limiting block is fixedly installed on one side of the middle of the clamping claw disk near the four clamps.

[0018] Preferably, slides are symmetrically and slidably mounted inside the four clamping plates, rubber plates are fixedly mounted on one end of the four slides close to the middle of the clamping claw disc, and rubber balls are fixedly mounted on one end of the four rubber plates away from the four slides.

[0019] Preferably, the four groups of slide frames are symmetrically fixed with sliders, the eight groups of sliders are respectively slidably installed in four groups of L-shaped grooves, the eight groups of slider side walls are fixedly installed with fourth screws, and the eight groups of fourth screws are threadedly installed with fourth threaded rings.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] In the present invention, by providing a clamping claw disk, a fixed cylinder, a fixed bar, an inner cylinder, a connecting rod, a mounting rod and a clamping plate, the four connecting rods always keep in a fitting state under the rotation of the fixed bar. When the fixed bar is in a vertical state, the two inner cylinders at the upper and lower ends will slide inside the fixed cylinder toward the upper and lower ends of the clamping claw disk. At the same time, the two inner cylinders at the left and right ends will approach the middle of the clamping claw disk inside the fixed cylinder. At this time, the two inner cylinders at the left and right ends will drive the mounting rod and the clamping plate to approach the middle of the clamping claw disk, thereby completing the grasping of the plastic product. By designing four clamping claws and grasping the plastic product by two relative clamping claws, the device always has two clamping claws in an idle state when in use. Therefore, when the two operating clamping claws are damaged, they can be grasped by two spare clamping claws without stopping for replacement, which can ensure the continuity of production and reduce the time waste caused by downtime, thereby significantly improving production efficiency.

[0022] In the present invention, by providing a first screw rod, a first threaded ring, a first spring, a pressure plate, a mounting rod, a mounting groove, a second screw rod, a threaded barrel, a second threaded ring, a U-shaped frame and an inner groove, the first threaded ring will press the mounting rod downward during installation, and at this time the mounting rod will synchronously press the pressure plate downward, and at this time the pressure plate will slide downward on the first screw rod, and at this time the first spring will also be compressed accordingly, and after the mounting rod is installed, the U-shaped frame can be inserted into the mounting groove, and then the two threaded barrels can be rotated on the second screw rod, and the two threaded barrels will slide toward both ends under the rotation of the two threaded barrels, and at this time the two threaded barrels will slide into the two inner grooves accordingly, and then the two second threaded rings can be installed on the two threaded barrels to complete the positioning, so that the installation and disassembly of the mounting rod and the U-shaped frame are more convenient when the device is in use, which saves operation time and helps to improve the overall work efficiency;

[0023] In the present invention, by providing a mounting rod, a mounting groove and a U-shaped frame, since the mounting groove is symmetrically opened on the mounting rod, the U-shaped frame can be installed on the end of the mounting rod that is close to each other, and is used to grab the plastic product from the outside to the inside. Similarly, the U-shaped frame can be installed on the end of the mounting rod that is far away from each other, and the plastic product will be grabbed from the inside to the outside. This makes the device suitable for grabbing different plastic products. The same device can realize multiple grabbing functions through different installation methods, giving full play to the potential of the device and improving the utilization rate of the device.

[0024] In the present invention, a U-shaped frame, a clamping plate, a third screw, a second spring, an L-shaped groove, a sliding frame, a rubber plate, a slider, a fourth screw and a fourth threaded ring are provided. When the sliding frame moves, the slider and the fourth screw fixed thereto are driven to move inside the L-shaped groove. When the positions of the two rubber plates are adjusted, the fourth threaded ring can be rotated on the fourth screw to complete the position limiting fixation. When grasping, the force applied to the rubber plate will drive the clamping plate to be subjected to force. At this time, the clamping plate will drive the third screw to slide in the U-shaped frame. At this time, the two second springs will generate elastic force, so that the clamping plate has a rebound space when grasping the plastic product, effectively avoiding the hard contact between the clamping claw and the plastic product, thereby causing damage, and enhancing the service life of the clamping claw.

[0025] In the present invention, the contact part of the clamp is divided into two sections, and the working position of each section is independently adjustable, so that it can adapt to different shapes of workpieces, thereby increasing the overall contact area and uniformity. The rubber plate is designed with multiple rubber balls, which are distributed in the contact area of ​​the clamp, so that the pressure is dispersed to multiple points or surfaces, so that the contact area between the clamp and the plastic product is larger and more uniform, which can disperse the gripping pressure and reduce the risk of clamp marks caused by local pressure concentration. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0027] Figure 2 It is a schematic diagram of the explosion structure of the mounting rod connection of the present invention;

[0028] Figure 3 This is a schematic diagram of the inner cylinder connection explosion structure of the present invention;

[0029] Figure 4 It is a schematic diagram of the connecting rod connection structure of the present invention;

[0030] Figure 5 It is a schematic diagram of the connection structure of the pressing plate of the present invention;

[0031] Figure 6 This is a schematic diagram of the U-shaped frame connection explosion structure of the present invention;

[0032] Figure 7 It is a schematic diagram of the splint connection structure of the present invention;

[0033] Figure 8 It is a schematic diagram of the explosion structure of the slide connection of the present invention.

[0034] In the figure, the corresponding relationship between the names of the components and the numbers of the accompanying drawings is: 11, clamping claw plate; 12, fixing cylinder; 13, first slide groove; 14, mounting frame; 15, driving motor; 16, fixing strip; 17, fixing plate; 21, inner cylinder; 22, connecting rod; 23, slot; 24, first screw rod; 25, first threaded ring; 26, first spring; 27, pressing plate; 31, mounting rod; 32, mounting groove; 33, fixing block; 34, second screw rod; 35, threaded cylinder; 36, second threaded ring; 41, U-shaped frame; 42, inner groove; 43, heat dissipation hole; 44, clamping plate; 45, third screw rod; 46, third threaded ring; 47, second spring; 48, L-shaped groove; 49, limit block; 51, sliding frame; 52, rubber plate; 53, rubber ball; 54. Sliding block; 55. Fourth screw rod; 56. Fourth threaded ring. DETAILED DESCRIPTION

[0035] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0036] See also Figure 1 - Figure 8 The present invention provides an anti-pinching claw structure of a CNC lathe for processing plastics, comprising a claw plate 11, fixed cylinders 12 are evenly and equidistantly fixedly installed inside the claw plate 11, first slide grooves 13 are opened on the side walls of the four fixed cylinders 12, a mounting frame 14 is fixedly installed on the side wall of the claw plate 11, a driving motor 15 is fixedly installed in the inner wall of the claw plate 11, a fixing bar 16 is fixedly installed on the output shaft of the driving motor 15, and a fixing plate 17 is fixedly installed on the side wall of the claw plate 11 away from the mounting frame 14;

[0037] Adjustment mechanisms are slidably installed inside the four first slide grooves 13;

[0038] The adjusting mechanism comprises an inner cylinder 21, and the four inner cylinders 21 are respectively slidably installed in the four first slide grooves 13, and the four inner cylinders 21 are provided with connecting rods 22 between each other, and the four inner cylinders 21 are hinged together in pairs through the four connecting rods 22. The side walls of the four inner cylinders 21 are provided with slots 23, and the inner walls of the four slots 23 are fixedly installed with first screw rods 24, and the four first screws 24 are threadedly installed with first threaded rings 25, and the four first screws 24 are sleeved with first springs 26, and the four first springs 26 are respectively fixedly installed in the inner walls of the four slots 23, and the upper ends of the four first springs 26 are fixedly installed with pressure plates 27, and the four pressure plates 27 are respectively sleeved on the four first screws 24, and the four slots 23 are inserted with mounting rods 31, and the upper and lower ends of the four mounting rods 31 are symmetrically provided with mounting grooves 32, and the four mounting rods 31 are symmetrically provided with mounting grooves 32. The upper and lower ends are fixedly installed with fixing blocks 33, and the inside of the four groups of fixing blocks 33 are fixedly installed with second screw rods 34. The two ends of the four groups of second screw rods 34 are threadedly installed with threaded barrels 35, and the eight groups of threaded barrels 35 are threadedly installed with second threaded rings 36. The insides of the four groups of mounting grooves 32 are all plugged with U-shaped frames 41. When installing the U-shaped frames 41, since the mounting grooves 32 are symmetrically opened on the mounting rods 31, the U-shaped frames 41 can be installed on the ends of the mounting rods 31 that are close to each other, and are used to grab plastic products from the outside to the inside. Similarly, the U-shaped frames 41 can be installed on the ends of the mounting rods 31 that are far away from each other. At this time, the plastic products will be grabbed from the inside to the outside, so that the device is suitable for grabbing different plastic products. The same device can realize multiple grabbing functions through different installation methods, give full play to the potential of the device, and improve the utilization rate of the device;

[0039] The four U-shaped frames 41 are symmetrically provided with inner grooves 42, and the four groups of inner grooves 42 are all adapted to the threaded tubes 35. When in use, the mounting rod 31 can be first inserted into the slot 23, and the mounting rod 31 will also be synchronously inserted into the first screw rod 24. At this time, the first threaded ring 25 can be installed on the first screw rod 24. Since the two are threadedly connected, the first threaded ring 25 will press the mounting rod 31 downward during installation, and the mounting rod 31 will synchronously press the pressure plate 27 downward, and the pressure plate 27 will slide downward on the first screw rod 24. At this time, the first spring The spring 26 will also be compressed accordingly. After the mounting rod 31 is installed, the U-shaped frame 41 can be inserted into the mounting groove 32. Then, the two threaded barrels 35 can be rotated on the second screw rod 34. Under the rotation of the two threaded barrels 35, they will slide to both ends. At this time, the two threaded barrels 35 will slide into the two inner grooves 42. Then, two second threaded rings 36 can be installed on the two threaded barrels 35 to complete the positioning, so that the installation and disassembly of the mounting rod 31 and the U-shaped frame 41 are more convenient when the device is used, which saves operation time and helps to improve the overall work efficiency.

[0040] The four U-shaped frames 41 are each provided with a heat dissipation hole 43, and a clamping plate 44 is provided on one side of the four U-shaped frames 41 near the middle of the clamping claw plate 11. When in use, the mounting frame 14 can be first installed on the CNC lathe, and then the clamping claw plate 11 can be moved to the plastic grabbing position by the CNC lathe. At this time, the CNC lathe can control the drive motor 15 to start, and under the action of the drive motor 15, the drive motor 15 connected to its output shaft will be driven to rotate accordingly, and under the rotation of the fixing bar 16, the four connecting rods 22 will always keep in contact with each other. When the fixing bar 16 is in a vertical state, the two inner cylinders 21 at the upper and lower ends will be inside the fixing cylinder 12 to the upper and lower sides of the clamping claw plate 11. The two inner cylinders 21 at the left and right ends will slide, and at the same time, the two inner cylinders 21 at the left and right ends will move closer to the middle of the clamping claw plate 11 inside the fixed cylinder 12. At this time, the two inner cylinders 21 at the left and right ends will drive the mounting rod 31 and the clamping plate 44 to move closer to the middle of the clamping claw plate 11, thereby completing the grasping of the plastic product. By designing four clamps and grasping the plastic product by two relative clamps, the device always has two clamps in an idle state when in use. Therefore, when the two operating clamps are damaged, they can be grasped by two spare clamps without stopping for replacement, which can ensure the continuity of production and reduce the time waste caused by downtime, thereby significantly improving production efficiency.

[0041] The four clamping plates 44 are symmetrically fixedly installed with third screws 45, and the four groups of third screws 45 are threadedly installed with third threaded rings 46. The four U-shaped frames 41 and the clamping plates 44 are fixedly installed with second springs 47, and the four groups of second springs 47 are respectively sleeved on the four groups of third screws 45. The four clamping plates 44 are symmetrically provided with L-shaped grooves 48. The four clamping plates 44 are fixedly installed with limited blocks 49 on one side of the middle of the clamping claw plate 11. The four clamping plates 44 are symmetrically slidably installed with slides 51 inside. The four groups of slides 51 are on one end near the middle of the clamping claw plate 11. A rubber plate 52 is fixedly installed on each of the four groups of rubber plates 52, and a rubber ball 53 is fixedly installed on one end away from the four groups of slides 51. By dividing the contact part of the clamping jaw into two sections, each section can be adjusted to an independent working position, so that it can adapt to different shapes of workpieces, thereby increasing the overall contact area and uniformity. The rubber plate 52 is designed with multiple rubber balls 53, which are distributed in the contact area of ​​the clamping jaws, so that the pressure is dispersed to multiple points or surfaces, so that the contact area between the clamping jaws and the plastic product is larger and more uniform, which can disperse the grasping pressure and reduce the risk of clamp marks caused by local pressure concentration;

[0042] The four sets of slides 51 are symmetrically fixed with sliders 54, and the eight sets of sliders 54 are slidably installed in the four sets of L-shaped grooves 48, respectively. The side walls of the eight sets of sliders 54 are fixedly installed with fourth screws 55, and the eight sets of fourth screws 55 are threadedly installed with fourth threaded rings 56. Before grabbing, the slide 51 can be moved inside the clamping plate 44 according to the size of the grabbed plastic products. The movement of the slide 51 will drive the sliders 54 and the fourth screws 55 fixed thereto to move inside the L-shaped groove 48. When the two rubber products are aligned, the sliders 54 and the fourth screws 55 are moved. After the position adjustment of the plate 52 is completed, the fourth threaded ring 56 can be rotated on the fourth screw 55 to complete the limit fixation. When grabbing, the rubber plate 52 will be subjected to force, which will drive the clamping plate 44 to be subjected to force. At this time, the clamping plate 44 will drive the third screw 45 to slide in the U-shaped frame 41. At this time, the two second springs 47 will generate elastic force, so that the clamping plate 44 has rebound space when grabbing the plastic product, which effectively avoids the hard contact between the clamping claw and the plastic product, thereby causing damage, and enhancing the service life of the clamping claw.

[0043] Working principle:

[0044] In the first step, the mounting frame 14 can be installed on the CNC lathe first, and then the clamping plate 11 can be moved to the plastic grabbing position by the CNC lathe. At this time, the CNC lathe can control the drive motor 15 to start, and the drive motor 15 connected to its output shaft will be driven to rotate under the action of the drive motor 15, and the four connecting rods 22 will always keep in contact with each other under the rotation of the fixed bar 16. When the fixed bar 16 is in a vertical state, the two inner cylinders 21 at the upper and lower ends will slide inside the fixed cylinder 12 toward the upper and lower ends of the clamping plate 11. At the same time, the two inner cylinders at the left and right ends 21 will approach the middle of the clamping plate 11 inside the fixed cylinder 12, and at this time, the two inner cylinders 21 at the left and right ends will drive the mounting rod 31 and the clamping plate 44 to approach the middle of the clamping plate 11, thereby completing the grasping of the plastic product. By designing four clamping jaws and grasping the plastic product by two relative clamping jaws, the device always has two clamping jaws in an idle state when in use. Therefore, when the two operating clamping jaws are damaged, the two spare clamping jaws can be used for grasping without stopping the machine for replacement, which can ensure the continuity of production and reduce the time waste caused by downtime, thereby significantly improving production efficiency.

[0045] The second step is to insert the mounting rod 31 into the slot 23 when using it. At this time, the mounting rod 31 will also be synchronously inserted into the first screw rod 24. At this time, the first threaded ring 25 can be installed on the first screw rod 24. Since the two are threadedly connected, the first threaded ring 25 will press the mounting rod 31 downward during installation. At this time, the mounting rod 31 will synchronously press the pressure plate 27 downward. At this time, the pressure plate 27 will slide downward on the first screw rod 24, and the first spring 26 will also be compressed accordingly. After the mounting rod 31 is installed, the U-shaped frame 41 can be inserted into the mounting groove 32, and then the two threaded barrels 35 can be rotated on the second screw rod 34. Under the rotation of the two threaded barrels 35, they will slide toward both ends. At this time, the two threaded barrels 35 will slide into the two inner grooves 42, and then the two second threaded rings 36 can be installed on the two threaded barrels 35 to complete the positioning, so that the installation and disassembly of the mounting rod 31 and the U-shaped frame 41 are more convenient when the device is in use, which saves operation time and helps to improve the overall work efficiency.

[0046] The third step is to install the U-shaped frame 41. Since the mounting grooves 32 are symmetrically opened on the mounting rods 31, the U-shaped frame 41 can be installed on the ends of the mounting rods 31 that are close to each other, so as to grab the plastic products from the outside to the inside. Similarly, the U-shaped frame 41 can be installed on the ends of the mounting rods 31 that are far away from each other. In this case, the plastic products will be grabbed from the inside to the outside, so that the device is suitable for grabbing different plastic products. The same device can realize multiple grabbing functions through different installation methods, giving full play to the potential of the device and improving the utilization rate of the device.

[0047] The fourth step is to move the slide 51 inside the clamping plate 44 according to the size of the plastic product to be grasped before grasping. The movement of the slide 51 will drive the slider 54 and the fourth screw 55 fixed thereto to move inside the L-shaped groove 48. When the position adjustment of the two rubber plates 52 is completed, the fourth threaded ring 56 can be rotated on the fourth screw 55 to complete the limit fixation. When grasping, the force on the rubber plate 52 will drive the clamping plate 44 to be forced. At this time, the clamping plate 44 will drive the third screw 45 to slide in the U-shaped frame 41. At this time, the two second springs 47 will generate elastic force, so that the clamping plate 44 has a rebound space when grasping the plastic product, which effectively avoids the hard contact between the clamping claw and the plastic product, thereby causing damage, and enhancing the service life of the clamping claw;

[0048] The fifth step is to divide the contact part of the clamp into two sections, each section has an independent working position that is adjustable so that it can adapt to different shapes of workpieces, thereby increasing the overall contact area and uniformity. The rubber plate 52 is designed with multiple rubber balls 53, which are distributed in the contact area of ​​the clamp so that the pressure is dispersed to multiple points or surfaces, making the contact area between the clamp and the plastic product larger and more uniform, which can disperse the gripping pressure and reduce the risk of clamp marks caused by local pressure concentration.

[0049] The embodiments of the present invention are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A clamping jaw structure for preventing pinch marks of a CNC lathe for processing plastics, comprising a clamping jaw plate (11), wherein fixing cylinders (12) are evenly and equidistantly fixedly installed inside the clamping jaw plate (11), characterized in that: A first slide groove (13) is formed on the side walls of the four fixed cylinders (12); a mounting frame (14) is fixedly mounted on the side wall of the clamping claw plate (11); a driving motor (15) is fixedly mounted in the inner wall of the clamping claw plate (11); a fixing bar (16) is fixedly mounted on the output shaft of the driving motor (15); and a fixing plate (17) is fixedly mounted on the side wall of the clamping claw plate (11) away from the mounting frame (14); An adjustment mechanism is slidably mounted inside each of the four first sliding grooves (13); The adjustment mechanism comprises an inner cylinder (21), four inner cylinders (21) are slidably mounted in four first slide grooves (13), connecting rods (22) are arranged between the four inner cylinders (21), the four inner cylinders (21) are hinged together in pairs through the four connecting rods (22), slots (23) are provided on the side walls of the four inner cylinders (21), mounting rods (31) are inserted in the four slots (23), mounting grooves (32) are symmetrically provided at the upper and lower ends of the four mounting rods (31), U-shaped frames (41) are inserted in the four groups of mounting grooves (32), and a clamping plate (44) is provided on one side of the four U-shaped frames (41) close to the middle of the clamping claw plate (11). The clamping plates (44) are symmetrically provided with L-shaped grooves (48), and slides (51) are symmetrically slidably installed inside the four clamping plates (44). A rubber plate (52) is fixedly installed on one end of the four groups of slides (51) close to the middle of the clamping claw plate (11), and a rubber ball (53) is fixedly installed on one end of the four groups of rubber plates (52) away from the four groups of slides (51). Slide blocks (54) are symmetrically fixedly installed on the four groups of slides (51). Eight groups of slide blocks (54) are respectively slidably installed in the four groups of L-shaped grooves (48). Fourth screw rods (55) are fixedly installed on the side walls of the eight groups of slide blocks (54), and fourth threaded rings (56) are threadedly installed on the eight groups of fourth screw rods (55).

2. The anti-pinching claw structure of a CNC lathe for processing plastics as claimed in claim 1, characterized in that: A first screw rod (24) is fixedly mounted in the inner walls of the four slots (23); Wherein, each of the four first screw rods (24) is threadedly mounted with a first threaded ring (25).

3. The anti-pinching claw structure of a CNC lathe for processing plastics as claimed in claim 2, characterized in that: The four first screw rods (24) are each sleeved with a first spring (26), and the four first springs (26) are respectively fixedly mounted in the inner walls of the four slots (23); A pressure plate (27) is fixedly mounted on the upper ends of the four first springs (26), and the four pressure plates (27) are respectively sleeved on the four first screw rods (24).

4. The anti-pinching claw structure of a CNC lathe for processing plastics as claimed in claim 3, characterized in that: Fixing blocks (33) are fixedly mounted at both upper and lower ends of the four mounting rods (31).

5. The anti-pinching claw structure of a CNC lathe for processing plastics as claimed in claim 4, characterized in that: The four groups of fixed blocks (33) are all fixedly mounted with second screw rods (34), and both ends of the four groups of second screw rods (34) are threadedly mounted with threaded barrels (35); Wherein, the eight groups of threaded barrels (35) are all threadedly mounted with a second threaded ring (36).

6. The anti-pinching claw structure of a CNC lathe for processing plastics as claimed in claim 5, characterized in that: The four U-shaped frames (41) are symmetrically provided with inner grooves (42); The four groups of inner grooves (42) are all compatible with the threaded barrel (35).

7. The anti-pinching claw structure of a CNC lathe for processing plastics as claimed in claim 6, characterized in that: The four U-shaped frames (41) are each provided with a heat dissipation hole (43); The four clamping plates (44) are all symmetrically fixedly mounted with third screw rods (45), and the four groups of third screw rods (45) are all threadedly mounted with third threaded rings (46).

8. The anti-pinching claw structure of a CNC lathe for processing plastics as claimed in claim 7, characterized in that: A second spring (47) is fixedly installed between the four U-shaped frames (41) and the clamping plate (44), and the four groups of the second springs (47) are respectively sleeved on the four groups of third screw rods (45); Wherein, a limiting block (49) is fixedly mounted on one side of the four clamping plates (44) close to the middle of the clamping jaw plate (11).

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