An eight-claw clamp for lathe

Abstract

The utility model discloses an eight-jaw clamp for a lathe, comprising a main body, four jaw seats are evenly arranged at the edge of the front side of the main body in a circumferential direction, a first wedge block is slidably inserted into the side surface of the main body corresponding to the position of the jaw seat, the bottom of the jaw seat is fixedly connected to the first wedge block, a telescopic spring is inserted into the interior of the main body along the sliding direction of the first wedge block, one end of the telescopic spring is fixedly connected to the first wedge block, and the other end of the telescopic spring is fixedly connected to the main body; a central connecting column is slidably inserted into the center of the interior of the main body, and a pull rod connecting plate is arranged at one end of the central connecting column; the utility model forms an eight-jaw clamp by cooperating with four groups of pressure plate seats and four jaw seats, which can better realize self-centering clamping of cylindrical workpieces, complete multi-point contact clamping, reduce clamping deformation, and improve production quality.

Description

Technical Field

[0001] The utility model relates to the technical field of lathe clamps, in particular to an eight-claw clamp for a lathe. Background Art

[0002] When processing cylindrical workpieces, they need to be clamped with a clamp. The clamps used to clamp cylindrical workpieces usually include three-jaw, four-jaw, and six-jaw clamps. Three-jaw, four-jaw, and six-jaw clamps can cover the clamping of most round products, but the jaws are rigid. If the difference in the workpiece blanks is too large, some jaws will not be able to achieve good contact, affecting the clamping effect. Utility Model Content

[0003] The purpose of the utility model is to provide an eight-claw clamp for a lathe to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an eight-claw clamp for a lathe, comprising a main body, four claw seats are evenly arranged at the edge of the front side of the main body along the circumferential direction, a first wedge block is slidably inserted at the side of the main body corresponding to the position of the claw seat, the bottom of the claw seat is fixedly connected to the first wedge block, a telescopic spring is inserted inside the main body along the sliding direction of the first wedge block, one end of the telescopic spring is fixedly connected to the first wedge block, and the other end of the telescopic spring is fixedly connected to the main body;

[0005] A central connecting column is slidably inserted in the center of the main body, one end of the central connecting column is provided with a pull rod connecting plate, and the other end of the central connecting column is provided with a fourth wedge block, and one end of the first wedge block extending into the main body cooperates with the inclined edge of the fourth wedge block;

[0006] A pressure plate seat is provided at the front edge of the main body between two adjacent clamping claw seats, and pressure plates are provided on both sides of the pressure plate seat. A second wedge block is slidably installed on the inner side of the pressure plate seat, and both sides of the second wedge block extend to the outside of the pressure plate seat, and the second wedge block is located on both sides of the outside of the pressure plate seat and is respectively fixedly connected to the two pressure plates, and a positioning spring is inserted into the bottom of the pressure plate seat along the sliding direction of the second wedge block, one end of the positioning spring is fixedly connected to the second wedge block, and the other end of the positioning spring is fixedly connected to the pressure plate seat.

[0007] Wherein, a base is fixedly installed at the bottom of the main body by bolts, and a transition plate is fixedly installed at the bottom of the base.

[0008] Wherein, a baffle is provided at the center of the front side of the main body.

[0009] Wherein, a damping vibration isolator is provided between the central connecting column and the fourth wedge-shaped block.

[0010] Wherein, a nylon insert for clamping is provided on the top of the clamping jaw seat.

[0011] Wherein, third wedge blocks are formed on both sides of the second wedge block, the third wedge blocks extend into the pressure plate, and the pressure plate is fixedly connected to the second wedge block through the third wedge blocks.

[0012] Wherein, a second nylon chuck is rotatably mounted on the bottom of the pressing plate through a latch, and a first nylon chuck is fixedly mounted on the top of the pressing plate.

[0013] Wherein, a stop block is provided at a position on the surface of the pressure plate corresponding to the third wedge-shaped block, and a buffer spring is provided between the stop block and the third wedge-shaped block.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The utility model is connected with the driving connecting rod of the lathe through the connecting rod connecting plate, and then the fourth wedge block can be driven to move in the axial direction through the central connecting column. Since the end of the first wedge block extending to the inside of the main body cooperates with the inclined edge of the fourth wedge block, when the fourth wedge block is pushed, the first wedge block can be pushed to slide outward, thereby expanding the clamping claw seat. When the fourth wedge block is pulled inward, the first wedge block is driven to slide inward under the action of the telescopic spring, thereby contracting the clamping claw seat to play a clamping role. When clamping the cylindrical workpiece, the annular pressure plate is pushed by the second wedge block to position the cylindrical workpiece to ensure that the cylindrical workpiece is located at the center of the clamping disk. The four groups of pressure plate seats and the four clamping claw seats cooperate to form an eight-jaw clamp, which can better realize the self-centering clamping of the cylindrical workpiece, and complete multi-point contact clamping, reduce clamping deformation, and improve production quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the axonometric structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the main structure of the utility model;

[0018] Figure 3 for Figure 2 Schematic diagram of the CC cross-section structure.

[0019] In the figure: 1. main body; 2. base; 3. transition plate; 4. baffle; 5. first wedge block; 6. clamping jaw seat; 7. nylon insert; 8. pressure plate; 9. pressure plate seat; 10. second wedge block; 11. third wedge block; 12. first nylon chuck; 13. second nylon chuck; 14. baffle; 15. latch; 16. fourth wedge block; 17. center connecting column; 18. pull rod connecting plate; 19. damping shock absorber. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0021] See also Figure 1-3 The utility model provides a technical solution: an octagonal clamp for a lathe, comprising a main body 1, four claw seats 6 are evenly arranged at the edge of the front side of the main body 1 in the circumferential direction, a first wedge block 5 is slidably inserted at the position of the claw seat 6 on the side of the main body 1, the bottom of the claw seat 6 is fixedly connected to the first wedge block 5, a telescopic spring is inserted in the sliding direction of the first wedge block 5 inside the main body 1, one end of the telescopic spring is fixedly connected to the first wedge block 5, and the other end of the telescopic spring is fixedly connected to the main body 1, a central connecting column 17 is slidably inserted at the center of the main body 1, one end of the central connecting column 17 is provided with a pull rod connecting plate 18, and the other end of the central connecting column 17 is provided with a fourth wedge block 16, the first wedge block 5 extends to one end of the main body 1 and is connected to the first wedge block 5. The inclined edges of the four wedge blocks 16 cooperate with each other, and a base 2 is fixedly installed at the bottom of the main body 1 by bolts. A transition plate 3 is fixedly installed at the bottom of the base 2. The clamp is connected to the mechanical arm of the lathe through the transition plate 3, and is connected to the driving connecting rod of the lathe through the connecting rod connecting plate 18. Then, the fourth wedge block 16 can be driven to move in the axial direction through the central connecting column 17. Since one end of the first wedge block 5 extending to the inside of the main body 1 cooperates with the inclined edge of the fourth wedge block 16, when the fourth wedge block 16 is pushed forward, the first wedge block 5 can be pushed to slide outward, thereby expanding the clamping claw seat 6. When the fourth wedge block 16 is pulled inward, the first wedge block 5 is driven to slide inward under the action of the telescopic spring, thereby contracting the clamping claw seat 6 to play a clamping role.

[0022] Among them, a pressure plate seat 9 is provided between two adjacent clamping claw seats 6 at the front edge of the main body 1, and four pressure plate seats 9 are provided. Pressure plates 8 are provided on both sides of the pressure plate seat 9. A second wedge block 10 is slidably installed on the inner side of the pressure plate seat 9. Both sides of the second wedge block 10 extend to the outside of the pressure plate seat 9, and the second wedge block 10 is located on both sides of the outside of the pressure plate seat 9 and is fixedly connected to the two pressure plates 8 respectively. A positioning spring is inserted at the bottom of the pressure plate seat 9 along the sliding direction of the second wedge block 10, one end of the positioning spring is fixedly connected to the second wedge block 10, and the other end of the positioning spring is fixedly connected to the pressure plate seat 9;

[0023] When clamping the cylindrical workpiece, the annular pressing plate 8 is pushed by the second wedge block 10 to position the cylindrical workpiece, ensuring that the cylindrical workpiece is located at the center of the clamping disk.

[0024] A baffle 4 is provided at the center of the front side of the main body 1 . When a cylindrical workpiece is clamped, the end of the cylindrical workpiece will contact the baffle 4 , and the baffle 4 will separate the cylindrical workpiece from the structure inside the main body 1 .

[0025] Among them, a damping shock absorber 19 is provided between the central connecting rod 17 and the fourth wedge block 16. When the central connecting rod 17 pushes the fourth wedge block 16 to move, the damping shock absorber 19 plays a buffering role to avoid rigid impact, prevent rigid clamping when the clamping jaw seat 6 clamps the cylindrical workpiece, and avoid damage to the clamping part of the cylindrical workpiece.

[0026] Among them, a nylon insert 7 for clamping is provided on the top of the clamping jaw seat 6. When the clamping jaw seat 6 clamps the cylindrical workpiece, the nylon insert 7 on the top of the clamping jaw seat 6 contacts the surface of the cylindrical workpiece to avoid causing indentations on the surface of the cylindrical workpiece.

[0027] Among them, third wedge blocks 11 are formed on both sides of the second wedge block 10, and the third wedge block 11 extends into the pressure plate 8. The pressure plate 8 is fixedly connected to the second wedge block 10 through the third wedge block 11. After the clamping jaw seat 6 clamps the cylindrical workpiece, the cylindrical workpiece will squeeze the pressure plate 8. Since the second wedge block 10 is slidably installed in the pressure plate seat 9, and there is a positioning spring between the pressure plate seat 9 and the second wedge block 10, the second wedge block 10 will be squeezed on the positioning spring. Through the elastic seat of the positioning spring, the second wedge block 10 is driven to drive the third wedge block 11 and the pressure plate 8 to react on the cylindrical workpiece. The annular pressure plate 8 is pushed by the second wedge block 10 to position the cylindrical workpiece to ensure that the cylindrical workpiece is located at the center of the clamping disk.

[0028] Among them, a second nylon chuck 13 is rotatably installed at the bottom of the pressing plate 8 through a pin 15, and a first nylon chuck 12 is fixedly installed on the top of the pressing plate 8. When clamping the cylindrical workpiece, the first nylon chuck 12 and the second nylon chuck 13 on the pressing plate 8 are in contact with the surface of the cylindrical workpiece to avoid causing indentations on the surface of the cylindrical workpiece.

[0029] A stopper 14 is provided at a position on the surface of the pressure plate 8 corresponding to the third wedge block 11 , and a buffer spring is provided between the stopper 14 and the third wedge block 11 , so as to support the third wedge block 11 through the buffer spring.

[0030] Working principle: When in use, it is connected to the driving connecting rod of the lathe through the connecting rod connecting plate 18, and then the fourth wedge block 16 can be driven to move in the axial direction through the central connecting column 17. Since the end of the first wedge block 5 extending to the inside of the main body cooperates with the inclined edge of the fourth wedge block 16, when the fourth wedge block 16 is pushed in, the first wedge block 5 can be pushed to slide outward, thereby opening the clamping claw seat 6. When the fourth wedge block 16 is pulled inward, the first wedge block 5 is driven to slide inward under the action of the telescopic spring, thereby contracting the clamping claw seat 6 to play a clamping role; when clamping the cylindrical workpiece, the annular pressure plate 8 is pushed by the second wedge block 10 to position the cylindrical workpiece to ensure that the cylindrical workpiece is located at the center of the clamping disk; through the cooperation of four groups of pressure plate seats 9 and four clamping claw seats 6, an eight-jaw clamp is formed, which can better realize the self-centering clamping of the cylindrical workpiece, and complete multi-point contact clamping, reduce clamping deformation, and improve production quality.

[0031] Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present utility model.

Claims

1. A lathe eight-claw clamp, comprising a main body (1), characterized in that: Four clamping claw seats (6) are evenly arranged along the circumferential direction at the edge of the front side of the main body (1); a first wedge block (5) is slidably inserted into the side of the main body (1) corresponding to the position of the clamping claw seat (6); the bottom of the clamping claw seat (6) is fixedly connected to the first wedge block (5); a telescopic spring is inserted into the inside of the main body (1) along the sliding direction of the first wedge block (5); one end of the telescopic spring is fixedly connected to the first wedge block (5), and the other end of the telescopic spring is fixedly connected to the main body (1); A central connecting column (17) is slidably inserted at the center of the main body (1), one end of the central connecting column (17) is provided with a pull rod connecting plate (18), and the other end of the central connecting column (17) is provided with a fourth wedge block (16), and one end of the first wedge block (5) extending to the inside of the main body (1) cooperates with the inclined edge of the fourth wedge block (16); A pressure plate seat (9) is provided between two adjacent clamping claw seats (6) at the front edge of the main body (1), and pressure plates (8) are provided on both sides of the pressure plate seat (9). A second wedge block (10) is slidably installed on the inner side of the pressure plate seat (9), and both sides of the second wedge block (10) extend to the outside of the pressure plate seat (9), and the second wedge block (10) is located on both sides of the outside of the pressure plate seat (9) and is fixedly connected to the two pressure plates (8) respectively. A positioning spring is inserted at the bottom of the pressure plate seat (9) along the sliding direction of the second wedge block (10), and one end of the positioning spring is fixedly connected to the second wedge block (10), and the other end of the positioning spring is fixedly connected to the pressure plate seat (9).

2. The lathe eight-claw clamp according to claim 1, characterized in that: A base (2) is fixedly mounted on the bottom of the main body (1) by means of bolts, and a transition plate (3) is fixedly mounted on the bottom of the base (2).

3. The lathe eight-claw clamp according to claim 1, characterized in that: A baffle (4) is provided at the center of the front side of the main body (1).

4. The lathe eight-claw clamp according to claim 1, characterized in that: A damping vibration isolator (19) is provided between the central connecting column (17) and the fourth wedge-shaped block (16).

5. The lathe eight-claw clamp according to claim 1, characterized in that: A nylon insert (7) for clamping is provided on the top of the clamping jaw seat (6).

6. The lathe eight-claw clamp according to claim 1, characterized in that: A third wedge block (11) is formed on both sides of the second wedge block (10), and the third wedge block (11) extends into the pressure plate (8). The pressure plate (8) is fixedly connected to the second wedge block (10) through the third wedge block (11).

7. The lathe eight-claw clamp according to claim 1, characterized in that: A second nylon chuck (13) is rotatably mounted on the bottom of the pressing plate (8) via a latch (15), and a first nylon chuck (12) is fixedly mounted on the top of the pressing plate (8).

8. The lathe eight-claw clamp according to claim 6, characterized in that: A stopper (14) is provided on the surface of the pressure plate (8) at a position corresponding to the third wedge-shaped block (11), and a buffer spring is provided between the stopper (14) and the third wedge-shaped block (11).

Images